CN114811942A - Water storage type electric water heater - Google Patents

Water storage type electric water heater Download PDF

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Publication number
CN114811942A
CN114811942A CN202210468374.0A CN202210468374A CN114811942A CN 114811942 A CN114811942 A CN 114811942A CN 202210468374 A CN202210468374 A CN 202210468374A CN 114811942 A CN114811942 A CN 114811942A
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CN
China
Prior art keywords
water
heater
pipe
tank
assembly
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Granted
Application number
CN202210468374.0A
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Chinese (zh)
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CN114811942B (en
Inventor
侯全舵
曾艳
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Xiamen Aquasu Electric Shower Co ltd
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Xiamen Aquasu Electric Shower Co ltd
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Priority to CN202210468374.0A priority Critical patent/CN114811942B/en
Publication of CN114811942A publication Critical patent/CN114811942A/en
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Publication of CN114811942B publication Critical patent/CN114811942B/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18Water-storage heaters
    • F24H1/20Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
    • F24H1/201Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00Details
    • F24H9/16Arrangements for water drainage 
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00Details
    • F24H9/18Arrangement or mounting of grates or heating means
    • F24H9/1809Arrangement or mounting of grates or heating means for water heaters
    • F24H9/1818Arrangement or mounting of electric heating means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00Details
    • F24H9/20Arrangement or mounting of control or safety devices
    • F24H9/2007Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2014Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
    • F24H9/2021Storage heaters

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

The invention discloses a water storage type electric water heater, comprising: a water storage tank, wherein a heater is arranged in the water storage tank; the instant heating type water heater is arranged in the shell; the water path assembly comprises a water inlet pipe communicated with the instant water heater and two normally closed assemblies connected to the water inlet pipe, wherein a tee joint is fixed on one normally closed assembly, one end of the tee joint is communicated with the water storage tank through a through pipe, the other end of the tee joint is communicated with a pressure conveying structure with an electromagnetic valve, a normally open assembly is arranged in the middle section of the other end of the tee joint in an extending mode, and the other normally closed assembly is communicated with the water storage tank through a conducting pipe; an inductor is arranged on a water inlet pipe of the instant water heater and is respectively and electrically connected with the normally closed assembly, the normally open assembly and the pressure conveying structure; the expansion water tank is communicated with the normally-open assembly and the electromagnetic valve of the pressure conveying structure through a transmission pipe, so that the storage and the output of water in the expansion water tank are independently controlled through two water paths without mutual interference, and multi-path water supply is realized.

Description

Water storage type electric water heater
Technical Field
The invention relates to a water heater, in particular to a water storage type electric water heater.
Background
The water heater is a device for heating municipal water into hot water through an electric heating assembly, the existing market is that water storage type electric water heaters are of two types, namely closed type and open type, the closed type can supply water in multiple ways, but a water tank of the water heater is pressed for a long time, the water tank needs to be made of pressed materials, and water leakage is easy to occur in the using process; although the open type can solve the problem that the water tank is pressed, the water outlet is constantly communicated with the atmosphere, only one path of water using requirement can be met, a single water heater cannot meet two requirements at the same time, and when the back pressure of equipment is too large, the water in the expansion water tank is difficult to take out.
Disclosure of Invention
The invention provides a water storage type electric water heater, which can effectively solve the problems.
The invention is realized by the following steps:
an electric storage water heater comprising:
a water storage tank arranged in the shell, wherein a heater is arranged in the water storage tank;
an instantaneous water heater disposed within the housing;
the water path assembly comprises a water inlet pipe communicated with the instant water heater and two normally closed assemblies connected to the water inlet pipe, wherein a tee joint is fixed on one normally closed assembly, one end of the tee joint is communicated with the water storage tank through a through pipe, the other end of the tee joint is communicated with a pressure conveying structure with an electromagnetic valve, a normally open assembly is arranged in the middle section of the other end of the tee joint in an extending mode, and the other normally closed assembly is communicated with the water storage tank through a conducting pipe;
an inductor is arranged on a water inlet pipe of the instant heating type water heater and is respectively and electrically connected with the normally closed assembly, the normally open assembly and the pressure conveying structure;
and the expansion water tank is respectively communicated with the normally open assembly and the electromagnetic valve of the pressure conveying structure through a transmission pipe.
As a further improvement, the expansion tank is provided with an exhaust hole.
As a further improvement, the expansion tank further comprises a high water level sensor and a low water level sensor, the high water level sensor is electrically connected with the controller of the heater, and the low water level sensor is electrically connected with the electromagnetic valve of the pressure conveying structure.
As a further improvement, a first temperature sensor is arranged on the water inlet pipe, a second temperature sensor is arranged on the water inlet pipe of the instant water heater, and a third temperature sensor is arranged on the water outlet pipe of the instant water heater.
As a further improvement, a controllable silicon is fixed on the water inlet pipe.
As a further improvement, a plurality of protection clamping seats are clamped on the circulating pipe.
As a further improvement, the transmission pipe is respectively connected with the normally open assembly and the solenoid valve of the pressure transmission structure through a three-branch pipe.
The invention has the beneficial effects that:
the water storage tank is characterized in that the normally open component is in an open state and the normally closed component is in a closed state under the condition of no water inflow, expansion water formed by a heater in the water storage tank enters the normally open component through the circulating pipe and then enters the expansion water tank through the normally open component through the transmission pipe for storage, the entering water is sensed by the sensor under the condition of water inflow, the normally closed component is started by the sensor to close the normally open component, the water in the water storage tank does not enter the expansion water tank any more at the moment, the water in the expansion water tank is pumped out by the pressure transmission structure through the transmission pipe and is mixed with the water in the water storage tank from the conduction pipe to be heated and output in the instant heating water heater, the storage and the output of the water in the expansion water tank are independently controlled through two ways without mutual interference, and multi-way water supply is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic view of an internal structure of a water storage type electric water heater provided by the invention with a housing removed.
Fig. 2 is a rear view of an electric water storage heater according to the present invention.
Fig. 3 is a top view of a water storage type electric water heater provided by the invention.
Fig. 4 is a cross-sectional view taken at a-a of fig. 3 in accordance with the present invention.
Fig. 5 is a schematic structural view of a waterway assembly provided by the present invention.
Fig. 6 is a schematic view of the connection of the waterway assembly with the water storage tank and the expansion tank.
Fig. 7 is a schematic structural diagram of an electric water storage heater according to the present invention.
Detailed Description
The embodiments of the present invention are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating the purposes, technical solutions and advantages of the embodiments of the present invention, which will be described in detail and fully with reference to the accompanying drawings in the embodiments of the present invention. All other implementations that can be derived by one of ordinary skill in the art based on the embodiments of the present invention show or imply relative importance or implicitly indicate the number of technical features indicated, without inventive step. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1-7, an electric storage water heater includes: a water storage tank 1 arranged in the housing Z, wherein a heater (not shown in the figure) is arranged in the water storage tank 1; an instantaneous water heater 2 disposed within the housing Z; the water path assembly 3 comprises a water inlet pipe 31 communicated with the instantaneous water heater 2 and two normally closed assemblies 32 connected to the water inlet pipe 31, wherein a tee 33 is fixed on one normally closed assembly 32, one end of the tee 33 is communicated with the water storage tank 1 through a through pipe 12, the other end of the tee 33 is communicated with a pressure conveying structure 35 with an electromagnetic valve, a normally open assembly 34 is arranged in the middle section of the other end of the tee 33 in an extending manner, and the other normally closed assembly 32 is communicated with the water storage tank 1 through a conducting pipe 13; an inductor 21 is arranged on a water inlet pipe of the instant heating type water heater 2, and the inductor 21 is respectively and electrically connected with the normally closed assembly 32, the normally open assembly 34 and the pressure conveying structure 35; expansion tank 4, expansion tank 4 through a transfer line 14 respectively with normally open subassembly 34, pressure conveying structure 35's solenoid valve communicates with each other, and wherein, the back of storage water tank 1 is provided with the mounting bracket, can install the mounting bracket in treating the installed part of mounted position pre-installation, the installed part if inflation screw, buckle etc..
In the water storage type electric water heater, there are two groups of heating structures, one group is the heater carried in the water storage tank 1, and the other group is the instant heating type water heater 2, wherein, the water storage tank 1 is a group of independent water supply system, no matter what state the water heater is in, all be in independent state, wherein, the water heater has two kinds of states, one kind of state is the heating state, the water heater is in the stage that does not go out water this moment, the second kind of state is the water use state, the water heater is in the stage that goes out water this moment, it is specific:
when the water heater is not used, in order to facilitate a user to use hot water when needed, the heater of the water storage tank 1 needs to be in a heating state all the time, redundant expansion water can be formed in the heating state, at the moment, because no external water inlet signal exists, the normally closed assembly 32 is in a normally closed state, the normally open assembly 34 is in a normally open state, and one end of a tee 33 connected with the normally open assembly 34 is communicated with the water storage tank 1 through the circulating pipe 12, the expansion water formed in the water storage tank 1 can enter the normally open assembly 34 and then enters the expansion water tank 4 through the conveying pipe 14 through the normally open assembly 34 to be stored in the expansion water tank 4, so that the water storage pressure of the water storage tank 1 is eliminated, and the phenomenon that the water storage tank 1 is expanded and deformed is avoided.
When the water heater needs to discharge water, the water inlet pipe 31 is filled with water, and the cold water entering the instant water heater 2 triggers the inductor 21, the inductor 21 immediately starts the two normally closed assemblies 32 and the pressure transmission structure 35, and closes the normally open assembly 34, and once the normally open assembly 34 is closed, the expansion water of the water storage tank 1 does not enter the normally open assembly 34 through the flow pipe 12 any more, the water storage tank 1 is communicated with the normally closed assembly 32 after being opened through the conduction pipe 13, and enters the instant water heater 2 through the normally closed assembly 32 to be mixed with the cold water and then outputs hot water, meanwhile, due to the opening of the normally closed assembly 32 and the pressure transmission structure 35, the pressure transmission structure 35 pumps the water in the expansion water tank 4 through the transmission pipe 14 to be mixed with the cold water in the water inlet pipe 31 and enters the water heater 2, and the other normally closed assembly 32 pumps the hot water in the water storage tank 1 through the conduction pipe 13, at this time, the cold water in the instantaneous water heater 2, the water in the expansion water tank 4 and the water in the water storage tank 1 are mixed and heated, and then the hot water is output through the water outlet pipe of the instantaneous water heater 2.
Through foretell two kinds of forms, at first, can guarantee that storage water tank 1 inflation water can be through a water route storage to expansion tank 4 in the heating, and when needs water, can extract the water use in expansion tank 4 through another water route, makes the water in expansion tank 4 be in the active state, can not appear the phenomenon fully loaded, can both take out the water wherein completely when using at every turn, can save again in the heating process next time.
In addition, it should be emphasized that in the above two technical solutions, the normally closed component 32 and the normally open component 34 are changed according to different opening and closing states, and the multi-waterway circulation is realized by a single waterway structure, if different waterways are separated and realized by different waterway structures, a plurality of groups of different waterway structures are needed, so that the whole water heater becomes too bulky, the overall cost is increased, the number of distributed water pipes is increased, and the water heater is obviously unsuitable in some installation environments with a small area.
The sensor 21 is a water quantity sensor, no water flows through the water inlet pipe of the instant water heater 2 under the condition that the water inlet pipe 31 is not filled with water and the normally closed assembly 32 is closed, and the water quantity sensor cannot give an opening and closing signal to the normally closed assembly 32 and the pressure conveying structure 35 on the premise that no water flows through the water inlet pipe 31, so that the normally open assembly 34 and the normally closed assembly 32 are not interfered with each other, and the normally closed assembly 32 is immediately started immediately after the water enters the water inlet pipe 31, so that the response effect is rapid.
In this embodiment, normally closed assembly 32 is normally closed solenoid valve, is in the state of closing all the time under the amazing condition of no signal, namely under the driven condition of no water level sensor, it is in normally closed state all the time, and normally open assembly 34 is normally open solenoid valve, is in the state of opening all the time under the amazing condition of no signal, so the inflation water can get into expansion tank 4 in through normally open solenoid valve, and in case water level sensor transmits drive signal, then normally open solenoid valve closes, no longer carries the inflation water to expansion tank 4.
The control mode of the water quantity sensor for changing and transmitting the signal to the chip and starting or closing the normally closed electromagnetic valve, the normally open electromagnetic valve and the pressure conveying structure through the chip is common technology in the field, and detailed description is omitted here.
In this embodiment, the pressure delivery structure 35 is a water pump, the water pump can pump the water in the expansion tank 4, in the existing structure of extracting the expansion water in the expansion tank 4, basically, the venturi effect is utilized, the negative pressure generated when water is introduced through the water inlet pipe 31 or the negative pressure generated when water is pumped from the water storage tank 1 sucks the water in the expansion tank 4, but in the middle of the actual operation, when the back pressure in the water path is too large, the water in the expansion tank 4 is difficult to be extracted through the venturi effect, or only part of the expansion water can be extracted, and if the water in the expansion tank 4 cannot be emptied, it is difficult to avoid that the expansion tank 4 can overflow by interference or even be fully loaded, in order to solve the problem: the pressure conveying structure 35 is arranged on the normally closed assembly 32, and after the normally closed assembly 32 is driven, the pressure conveying structure 35 can apply large pumping force to the expansion water tank 4 to completely empty and take out the expansion water in the expansion water tank to vacate the volume for the next time, and the pressure conveying structure 35 plays a role in emptying the expansion water tank 4 instead of purely conveying and conveying.
In order to avoid the siphon phenomenon in the expansion water tank 4, all the water in the water path is reversely pumped into the expansion water tank 4, so that the expansion water tank 4 is provided with an exhaust hole 41, and the exhaust hole 41 is communicated with the atmosphere, thereby avoiding the siphon phenomenon which may occur.
In order to cope with different situations when the water level of the expansion tank 4 is too low or too high during use, the expansion tank 4 further includes a high water level sensor 42 and a low water level sensor 43, the high water level sensor 42 is electrically connected to the controller of the heater, and the low water level sensor 43 is electrically connected to the solenoid valve of the pressure delivery structure 35.
When the expansion water tank 4 has a high water level phenomenon, the high water level sensor 42 in the expansion water tank 4 cuts off a controller of the heater to stop heating the water storage tank 1 and not generate expansion water for safety, and the heater is restarted after the water level of the expansion water tank 4 is reduced, wherein a large amount of expansion water is generated because the heater in the water storage tank 1 runs for a long time at the moment, and the expansion water tank 4 is difficult to accommodate the expansion water again;
when the expansion tank 4 has a low water level, it represents that the expansion water in the expansion tank 4 has been actually extracted almost, if the pressure conveying structure 35 extracts again, only air is extracted, if a small amount of expansion water is mixed with air, the water-consuming part will have the phenomenon of intermittent water spraying, which causes adverse effects on the user experience, so when the low water level sensor 43 detects that the water level is too low, a closing signal will be sent to the electromagnetic valve of the pressure conveying structure 35, so that the passage of the expansion tank 4 is closed, and the water in the water passage at this time will only be collected to the instant water heater 2 through the water inlet pipe 31 and the water flowing from the water storage tank 1.
In the middle of intaking, muddy water, the different stages of going out water, the temperature in each region is different, in order to understand the temperature between every region to and in order can in time learn when water route circulation mistake or muddy water temperature are not up to standard, be provided with first temperature sensor 311 on the oral siphon 31, be provided with second temperature sensor 21 on the inlet tube of instant hot water heater 2, be provided with third temperature sensor 22 on the outlet pipe of instant hot water heater 2, can understand the temperature between each stage, can in time automatically regulated or manual regulation when the unmatched condition of temperature reappears.
In another embodiment, the temperatures of the first temperature sensor 311, the second temperature sensor 21 and the third temperature sensor 22 can be fed back to the control terminal, and the control terminal can be a display interface of the water heater, or a mobile phone, a computer, a tablet of a user, and the like.
Further, a controllable silicon 36 is fixed on the water inlet pipe 31, wherein the controllable silicon 36 is electrically connected with the heater of the water storage tank 1, so that the constant temperature output of the heater can be ensured.
In order to protect the circulation pipe 12 and limit and fix the installation position of the circulation pipe, a plurality of protection clamping seats 37 are clamped on the circulation pipe 12, and the corresponding protection clamping seats 37 can be arranged at the corners of the pipeline or in a long-distance arrangement mode to prevent the pipeline from being damaged.
In order to avoid mutual interference between the normally open component 34 and the pressure conveying structure 35, the transmission pipe 14 is respectively connected with the solenoid valves of the normally open component 34 and the pressure conveying structure 35 through a branch pipe 38, and different paths can be selectively opened according to requirements by branching the branch pipe 38 and combining the normally open component 34 and the pressure conveying structure 35 with opening and closing characteristics, so that the integration effect is better.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. An electric water storage heater, comprising:
the water storage tank (1), wherein a heater is arranged in the water storage tank (1);
a tankless water heater (2) disposed within said housing (Z);
the water path assembly (3) comprises a water inlet pipe (31) communicated with the instant water heater (2) and two normally closed assemblies (32) connected to the water inlet pipe (31), wherein one normally closed assembly (32) is fixed with a tee joint (33), one end of the tee joint (33) is communicated with the water storage tank (1) through a through pipe (12), the other end of the tee joint (33) is communicated with a pressure conveying structure (35) with an electromagnetic valve, the middle section of the other end of the tee joint (33) is provided with a normally open assembly (34) in an extending mode, and the other normally closed assembly (32) is communicated with the water storage tank (1) through a conducting pipe (13);
an inductor (21) is arranged on a water inlet pipe of the instant heating type water heater (2), and the inductor (21) is respectively and electrically connected with the normally closed assembly (32), the normally open assembly (34) and the pressure conveying structure (35);
the expansion water tank (4) is communicated with the normally open assembly (34) and the electromagnetic valve of the pressure conveying structure (35) through a transmission pipe (14).
2. An electric storage water heater according to claim 1, characterized in that the expansion tank (4) is provided with a vent (41).
3. An electric water storage heater according to claim 2, characterized in that the expansion tank (4) further comprises a high water level sensor (42) and a low water level sensor (43), the high water level sensor (42) is electrically connected with the controller of the heater, and the low water level sensor (43) is electrically connected with the solenoid valve of the pressure delivery structure (35).
4. A water storage type electric water heater according to claim 1, wherein the water inlet pipe (31) is provided with a first temperature sensor (311), the water inlet pipe of the instantaneous water heater (2) is provided with a second temperature sensor (21), and the water outlet pipe of the instantaneous water heater (2) is provided with a third temperature sensor (22).
5. An electric storage water heater according to claim 4, characterized in that the inlet pipe (31) is fixed with a thyristor (36).
6. An electric water storage heater according to claim 1, characterized in that the flow pipe (12) is clamped with a plurality of protective clamping seats (37).
7. An electric storage water heater according to claim 1, characterized in that the delivery pipe (14) is connected to the solenoid valve of the normally open assembly (34) and the pressure delivery structure (35) through a branch pipe (38).
CN202210468374.0A 2022-04-29 2022-04-29 Water storage type electric water heater Active CN114811942B (en)

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Application Number Priority Date Filing Date Title
CN202210468374.0A CN114811942B (en) 2022-04-29 2022-04-29 Water storage type electric water heater

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Application Number Priority Date Filing Date Title
CN202210468374.0A CN114811942B (en) 2022-04-29 2022-04-29 Water storage type electric water heater

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CN114811942B CN114811942B (en) 2024-05-14

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0103428D0 (en) * 2000-07-18 2001-03-28 Zip Heaters Uk Ltd Improvements relating to water heaters
CN202024462U (en) * 2011-03-29 2011-11-02 江苏正本净化节水科技实业有限公司 Pipeline machine
CN203518249U (en) * 2013-10-22 2014-04-02 潘昊楠 Water heater capable of not dropping outwards during heating and provided with open-type water tank
DE102015012523A1 (en) * 2015-09-26 2017-03-30 Karl Schmitt Apparatus for intermediate storage and use of sanitary hot water dispensers initially to cold mixed water
CN107060002A (en) * 2017-04-14 2017-08-18 特斯联(北京)科技有限公司 Water purifier waste water recycling system and the method that moisturizing is carried out to electric heater
CN113758022A (en) * 2021-09-13 2021-12-07 厦门阿玛苏电子卫浴有限公司 Constant-temperature integrated efficient water heater and control method thereof
CN217737534U (en) * 2022-04-29 2022-11-04 厦门阿玛苏电子卫浴有限公司 Water storage type electric water heater

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0103428D0 (en) * 2000-07-18 2001-03-28 Zip Heaters Uk Ltd Improvements relating to water heaters
CN202024462U (en) * 2011-03-29 2011-11-02 江苏正本净化节水科技实业有限公司 Pipeline machine
CN203518249U (en) * 2013-10-22 2014-04-02 潘昊楠 Water heater capable of not dropping outwards during heating and provided with open-type water tank
DE102015012523A1 (en) * 2015-09-26 2017-03-30 Karl Schmitt Apparatus for intermediate storage and use of sanitary hot water dispensers initially to cold mixed water
CN107060002A (en) * 2017-04-14 2017-08-18 特斯联(北京)科技有限公司 Water purifier waste water recycling system and the method that moisturizing is carried out to electric heater
CN113758022A (en) * 2021-09-13 2021-12-07 厦门阿玛苏电子卫浴有限公司 Constant-temperature integrated efficient water heater and control method thereof
CN217737534U (en) * 2022-04-29 2022-11-04 厦门阿玛苏电子卫浴有限公司 Water storage type electric water heater

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