CN113048647B - Water return system and water storage type water heater - Google Patents

Water return system and water storage type water heater Download PDF

Info

Publication number
CN113048647B
CN113048647B CN201911364521.4A CN201911364521A CN113048647B CN 113048647 B CN113048647 B CN 113048647B CN 201911364521 A CN201911364521 A CN 201911364521A CN 113048647 B CN113048647 B CN 113048647B
Authority
CN
China
Prior art keywords
water
pipe
pipe section
outlet pipe
water return
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201911364521.4A
Other languages
Chinese (zh)
Other versions
CN113048647A (en
Inventor
黄娟
李博
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Haier Smart Home Co Ltd
Qingdao Economic and Technological Development Zone Haier Water Heater Co Ltd
Qingdao Haier New Energy Electric Appliance Co Ltd
Original Assignee
Haier Smart Home Co Ltd
Qingdao Economic and Technological Development Zone Haier Water Heater Co Ltd
Qingdao Haier New Energy Electric Appliance Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Haier Smart Home Co Ltd, Qingdao Economic and Technological Development Zone Haier Water Heater Co Ltd, Qingdao Haier New Energy Electric Appliance Co Ltd filed Critical Haier Smart Home Co Ltd
Priority to CN201911364521.4A priority Critical patent/CN113048647B/en
Publication of CN113048647A publication Critical patent/CN113048647A/en
Application granted granted Critical
Publication of CN113048647B publication Critical patent/CN113048647B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18—Water-storage heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/12—Hot water central heating systems using heat pumps

Landscapes

  • 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)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)

Abstract

The invention relates to the technical field of household appliances, and particularly discloses a water return system and a water storage type water heater. The water return system comprises a middle pipe, a water outlet pipe and a water return pipe, wherein the hot water source, the water outlet pipe and the water return pipe are sequentially connected to form a loop; the water inlet end of the intermediate pipe is connected with the water return pipe, the water outlet end of the intermediate pipe is connected with the water outlet pipe, and the water outlet pipe is divided into a first water outlet pipe section connected with a hot water source and a second water outlet pipe section connected with the water return pipe; the water return pipe is divided into a first water return pipe section connected with the water outlet pipe and a second water return pipe section connected with the hot water source; the middle pipe is provided with a first one-way valve which allows water flow to the water outlet end of the middle pipe; and a second one-way valve allowing water flow to the hot water source is arranged on the second water return pipe section. The water return system and the water storage type water heater provided by the invention reduce the energy consumption of the water storage type water heater, reduce the impact of the water return system on the water temperature stratification in the water tank and improve the available hot water quantity in the water tank.

Description

Water return system and water storage type water heater
Technical Field
The invention relates to the technical field of household appliances, in particular to a water return system and a water storage type water heater.
Background
Zero-cold water functions of water storage type water heaters such as air source heat pump water heaters and electric water heaters have become a new consumption trend. Among the prior art, the realization of zero cold water function is through in flowing back the water tank completely with the cold water in the pipeline, and the hot water in the water tank flows into the pipeline to be full of whole pipeline, this function can make the water in the pipeline remain higher temperature throughout, when opening tap, hot water in the pipeline will have comfortable warm water to flow out with the cold water mixture back that the cold water source provided.
However, the water heater with the zero-cold-water function has the following problems: in the process of circulating water in the pipeline and the water tank, because a large amount of cold water in the pipeline flows into the water tank, the impact on the water temperature stratification inside the water tank is large, the water temperature in the water tank is seriously reduced, and the available hot water quantity is greatly reduced; the water temperature in the water tank is higher, and the high-water-temperature hot water is in the pipeline when returning water, so that the heat loss is fast. The two problems cause the problem that the energy consumption of the water storage type water heater using the zero-cold-water function is high.
Disclosure of Invention
The invention aims to provide a water return system and a water storage type water heater, so as to reduce the energy consumption of the water storage type water heater, reduce the impact of the water return system on the water temperature stratification in a water tank and improve the available hot water quantity in the water tank.
In order to achieve the purpose, the invention adopts the following technical scheme:
a water return system comprises an intermediate pipe, a water outlet pipe and a water return pipe, wherein a hot water source, the water outlet pipe and the water return pipe are sequentially connected to form a loop;
the water inlet end of the middle pipe is connected with the water return pipe, the water outlet end of the middle pipe is connected with the water outlet pipe, and the water outlet pipe is divided into a first water outlet pipe section connected with the hot water source and a second water outlet pipe section connected with the water return pipe; the water return pipe is divided into a first water return pipe section connected with the water outlet pipe and a second water return pipe section connected with the hot water source;
the middle pipe is provided with a first one-way valve which allows water flow to the water outlet end of the middle pipe;
and a second one-way valve allowing water flow to the hot water source is arranged on the water return pipe.
Preferably, the first water outlet pipe section and/or the intermediate pipe is/are provided with a water quantity adjusting piece for adjusting the ratio of cold water and hot water entering the first water outlet pipe section.
Preferably, the water quantity regulating part is a proportional regulating valve and is arranged at the joint of the first water outlet pipe section, the middle pipe and the second water outlet pipe section.
Preferably, a first water quantity regulating valve is arranged on the first water outlet pipe section, and a second water quantity regulating valve is arranged on the middle pipe.
Preferably, the total length of the first water outlet pipe section and the second water return pipe section is equal to the total length of the second water outlet pipe section and the first water return pipe section.
Preferably, a booster pump is arranged on the second water outlet pipe section or the first water return pipe section.
Preferably, the return water pipe section is connected with a cold water pipe, and the cold water pipe is connected with a cold water source.
Preferably, at least one of the second water outlet pipe section, the first water return pipe section and the intermediate pipe is provided with a useful water point, and the second water outlet pipe section, the first water return pipe section or the intermediate pipe is provided with a first temperature sensor.
A water storage type water heater comprises a water tank and the water return system which is communicated with the water tank.
Preferably, a second temperature sensor is arranged at the water outlet of the water tank.
The invention has the beneficial effects that: and one part of water flows in the second water outlet pipe section, the first water return pipe section and the intermediate pipe to form a first circulation loop, and along with the other part of water in the water return system, the water is continuously injected into the water tank and the water in the water tank flows into the water return system, the water temperature in the first circulation loop is gradually increased and reaches a preset temperature, so that the function of zero cold water is realized.
When the water return system provided by the invention realizes the zero cold water function, part of cold water is remained in the first circulation loop, so that only part of cold water flows into the water tank, the cold water amount entering the water outlet tank is reduced, the impact of the cold water on the water temperature stratification of the water tank is reduced, and the influence on the change of the whole water temperature in the water tank is small. Because the amount of cold water injected into the water tank is reduced and the outflow of hot water from the water tank is reduced, the influence on the amount of hot water available in the water tank is reduced. In addition, after the hot water in the water tank is mixed with the cold water in the first circulation loop, the water temperature in the first circulation loop is lower than the water temperature in the water tank, so that compared with the prior art, the water temperature in the first circulation loop is reduced, the heat loss of a water return system can be further reduced, and the energy consumption of the water storage type water heater is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a water storage type water heater according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another water storage type water heater according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a first storage water heater according to an embodiment of the present invention when performing a zero-cold-water function;
fig. 4 is a schematic structural diagram of a first water storage type water heater according to a second embodiment of the present invention, when a user continues to use water;
fig. 5 is a schematic structural view of a second water storage type water heater according to a second embodiment of the present invention;
fig. 6 is a schematic structural diagram of a third water storage type water heater according to the second embodiment of the present invention.
In the figure:
1. an intermediate pipe; 2. a first water outlet pipe section; 3. a second water outlet pipe section; 4. a first water return pipe section; 5. a second return water pipe section; 6. a first check valve; 7. a second check valve; 8. a proportional regulating valve; 9. a booster pump; 10. water consumption; 11. a first temperature sensor; 12. a water tank; 13. a second temperature sensor; 14. a third temperature sensor; 15. a cold water pipe.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the present invention, the directional terms such as "upper", "lower", "left", "right", "inner" and "outer" are used for easy understanding without making a contrary explanation, and thus do not limit the scope of the present invention.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
The embodiment provides a water return system which is mainly used in a water storage type water heater to reduce the energy consumption of the water storage type water heater, reduce the impact of the water return system on the water temperature stratification in a water tank 12 and increase the available hot water quantity in the water tank 12. In the embodiment, a water return system is used for a water storage type water heater as an example for explanation. Of course, it can be understood that the water return system provided by the embodiment can also be used in other water supply equipment with a zero-cold-water function.
As shown in fig. 1, the water return system provided in this embodiment includes an intermediate pipe 1, a water outlet pipe, and a water return pipe, and the hot water source, the water outlet pipe, and the water return pipe are connected in sequence to form a loop. The water outlet end of the middle pipe 1 is connected with a water outlet pipe, and the water outlet pipe is divided into a first water outlet pipe section 2 connected with a hot water source and a second water outlet pipe section 3 connected with a water return pipe; the water inlet end of the middle pipe 1 is connected with a water return pipe, and the water return pipe is divided into a first water return pipe section 4 connected with the water outlet pipe and a second water return pipe section 5 connected with a hot water source.
The water outlet pipe and the water return pipe can be of an integrated structure, connectors are arranged at the connection positions of the water outlet pipe and the water return pipe and the middle pipe 1, and the middle pipe 1 is connected with the water outlet pipe and the water return pipe through the two connectors respectively. Of course, the water outlet pipe and the water return pipe may be of a split structure, wherein the first water outlet pipe section 2, the second water outlet pipe section 3 and the intermediate pipe 1 are connected through a three-way joint, and the first water return pipe section 4, the second water return pipe section 5 and the intermediate pipe 1 are connected through another three-way joint.
The middle tube 1 is provided with a first one-way valve 6 allowing water to flow towards its outlet end. The return pipe is provided with a second check valve 7 that allows water to flow to the hot water source, and specifically, as shown in fig. 1 and 2, the second check valve 7 is provided on the second return pipe section 5.
The water using point 10 can be arranged on the second water outlet pipe section 3, the first water return pipe section 4 or the middle pipe 1, when the temperature of the pipeline attached to the water using point 10 is lower, the first one-way valve 6 and the second one-way valve 7 of the water return system can be opened, one part of low-temperature cold water in the water return system flows into the water tank 12 through the second water return pipe section 5, the other part of low-temperature cold water flows back into the second water outlet pipe section 3 again through the middle pipe 1, meanwhile, hot water in the water tank 12 flows out from the first water outlet pipe section 2 and also flows into the second water outlet pipe section 3, and therefore, the hot water in the water tank 12 and the original cold water in the water return system are mixed in the second water outlet pipe section 3. One part of water flows in the second water outlet pipe section 3, the first water return pipe section 4 and the intermediate pipe 1 to form a first circulation loop, and along with the other part of water in the water return system, the water is continuously injected into the water tank 12 and the water in the water tank 12 flows into the water return system, the water temperature in the first circulation loop is gradually increased and reaches a preset temperature, and therefore the function of zero cold water is achieved.
When the water return system realizes the zero cold water function, part of cold water is remained in the first circulation loop, so that only part of cold water flows into the water tank 12, the cold water amount entering the water outlet tank 12 is reduced, the impact of the cold water on the water temperature stratification of the water tank 12 is reduced, and the influence on the change of the whole water temperature in the water tank 12 is small. The influence on the amount of hot water available in the water tank 12 is reduced because the amount of cold water filled into the water tank 12 is reduced and at the same time the amount of hot water flowing out of the water tank 12 is reduced. Moreover, after the hot water in the water tank 12 is mixed with the cold water in the first circulation loop, the water temperature in the first circulation loop is inevitably lower than the water temperature in the water tank 12, so that compared with the prior art, the water temperature in the first circulation loop is reduced, the heat loss of a water return system can be further reduced, and the energy consumption of the water storage type water heater is reduced.
Preferably, the total length of the first water outlet pipe section 2 and the second water return pipe section 5 in this embodiment is equal to the total length of the second water outlet pipe section 3 and the first water return pipe section 4, so that the full length of hot water in the water return system is half of the total length of the water return system, which can meet the requirement of a user on water consumption, and can also reduce the length of a pipeline for radiating heat to the outside in the water return system, thereby achieving the purpose of energy saving.
The energy saving effect of the water return system and the influence of the temperature of the water in the water tank 10 provided in the present embodiment will be described below by way of specific examples.
For an existing water return system:
assuming that the volume of the water tank 12 is 100L, the water tank 12 is filled with hot water of 55 ℃, and the temperature of the water in the pipeline of the water return system is 10 ℃. The total length of the pipeline of the water return system is 40m, the inner diameter of the pipeline is 20mm, and the mass m of cold water needing to be returned in the pipeline of the whole water return system 1 ＝3.14*0.01*0.01*40*1000＝12.56kg。
Mass m 1 The cold water enters the water tank 12, and the discharge mass m of the water outlet of the water tank 12 1 The remaining weight in the water tank 10 is (100 kg-m) 1 ) Hot water and m 1 The temperature of the water in the water tank 12 is T after the cold water is mixed 1 : according to the conservation of heat, the method comprises the following steps: 10 m 1 +55*100-m 1 ＝100*T 1 Then T is 1 At 49.3 deg.c, the temperature drop of the water in the tank 12 is Δ T 1 ＝55-T 1 ＝5.7℃。
For the water return system in this embodiment:
still assuming that the volume of the water tank 12 is 100L, the water tank 12 is filled with hot water of 55 ℃, and the temperature of the water in the pipeline of the water return system is 10 ℃. The total length of the pipeline of the water return system is 40m, the inner diameter of the pipeline is 20mm, and the mass m of cold water needing to return in the pipeline of the whole water return system 1 ＝3.14*0.01*0.01*40*1000＝12.56kg。
The mass of cold water which only needs to return to the water tank 12 by the half-way length of 20m of the pipeline of the water return system is m 2 ＝m 1 6.28 kg/2. If the water temperature in the first circulation loop needs to reach 40 ℃ after water return, the weight m is needed in the pipeline o The cold water is circulated back to the first circulation loop, 10 m o +55*(6.28-m o ) 40 x 6.28, then m o 2.09 kg. I.e. 2.09kg of cold water in the return system's pipeline is used, the cold water m in the first circulation loop entering the water tank 12 2 6.28-2.09-4.19 kg. The temperature of the water tank 12 is T 2 ：10*m 2 +55*(100-m 2 )＝100*T 2 Then T is 2 54.05 deg.C, temperature drop is DeltaT 2 ＝55-T 2 ＝0.95℃。
Therefore, after the water return system is adopted, the temperature of hot water in the water tank 12 is reduced to 5.7 ℃ after the water of the existing water return system returns water, and after the water of the water return system returns water, the temperature of the hot water in the water tank 12 is reduced to only 0.95 ℃, the reduction of the temperature of the water in the water tank 12 is obviously reduced, and the amount of available hot water in the water tank 12 is obviously increased. In addition, the temperature of water in the existing water return system is 50 ℃, hot water in the first circulation loop is 40 ℃ in the embodiment, and cold water is still in the second water return pipe section 5, so that the water return system provided by the invention reduces the heat dissipation temperature difference and the length of a heat dissipation pipeline, and plays a role in energy conservation. In order to control the amount of hot water entering the first circulation loop and the amount of cold water circulating back to the first circulation loop, water amount adjusting pieces are arranged on the first water outlet pipe section 2 and the intermediate pipe 1 and used for adjusting the proportion of cold water and hot water entering the second water outlet pipe section 2. Specifically, the hot water comes from the first water outlet pipe section 2, and the cold water directly comes from the intermediate pipe 1, and it can be understood that the second water outlet pipe section 3 and the first water return pipe section 4 can both provide cold water for the intermediate pipe 1. Furthermore, in order to quickly realize the temperature rise of the cold water in the first circulation loop, when the temperature of the cold water is relatively low, more hot water can enter the second water outlet pipe section 3 by controlling the water quantity adjusting piece, and less cold water enters the second water outlet pipe section 3; when the temperature of the cold water is relatively high, less hot water can enter the second water outlet pipe section 3 by controlling the water quantity adjusting piece, and more cold water enters the second water outlet pipe section 3, so that the influence of the hot water in the water passing tank 12 is reduced.
Preferably, the water quantity regulating member is a proportional regulating valve 8, and the proportional regulating valve 8 is arranged at the connection part of the first water outlet pipe section 2, the second water outlet pipe section 3 and the intermediate pipe 1. Wherein, two water inlets of the proportional control valve 8 are respectively connected with the first water outlet pipe section 2 and the intermediate pipe 1, and the water outlet is connected with the second water outlet pipe section 3. The opening sizes of the two water inlets can be respectively adjusted. The proportional control valve 8 is a common control valve on the market, is easy to obtain, and is connected at the joint of the first water outlet pipe section 2 and the intermediate pipe 1, so that openings for installing water quantity adjusting parts do not need to be formed at other positions of the first water outlet pipe section 2 and the intermediate pipe 1, and the possibility of water leakage of the first water outlet pipe section 2 and the intermediate pipe 1 is reduced. And the proportional control valve 8 can be installed on the premise of not increasing the number of the pipe sections of the water return system, the assembly difficulty of the water return system cannot be increased, and the assembly efficiency of the water return system is ensured. In addition, the water temperature in the first circulation loop can be adjusted at any time according to the requirements of users by arranging the proportion adjusting valve 8. The proportional regulating valve 8 is prior art, and therefore, the detailed structure and regulating principle thereof will not be described herein.
Of course, in other embodiments, the water quantity adjusting member may also be a water quantity adjusting valve, the first water outlet pipe section 2 is provided with a first water quantity adjusting valve, the middle pipe 1 is provided with a second water quantity adjusting valve, and the ratio of the cold water and the hot water entering the second water outlet pipe section 3 is adjusted by adjusting the opening degrees of the first water quantity adjusting valve and the second water quantity adjusting valve.
Of course, in other embodiments, the amount of the cold water in the intermediate pipe 1 entering the second water outlet pipe section 3 may be kept constant, and only the first water outlet pipe section 2 is provided with a water amount adjusting valve, so as to adjust the amount of the hot water entering the second water outlet pipe section 3, thereby achieving the purpose of adjusting the ratio of the cold water and the hot water entering the second water outlet pipe section 3. Or the quantity of the hot water in the first water outlet pipe section 2 entering the second water outlet pipe section 3 is kept unchanged, and only the middle pipe 1 is provided with the water quantity regulating valve, so that the quantity of the cold water entering the second water outlet pipe section 3 is regulated, and the aim of regulating the proportion of the cold water and the hot water entering the second water outlet pipe section 3 is fulfilled. The water quantity regulating valve is the prior art, and therefore, the specific structure and the regulating principle are not described in detail herein.
In order to improve the water return efficiency of the water return system, a booster pump 9 is arranged on the second water outlet pipe section 3 or the first water return pipe section 4, and the booster pump 9 can pump water into the intermediate pipe 1 and the second water return pipe section 5. Of course, in other embodiments, a booster pump 9 may be disposed on the first water outlet pipe section 2 to increase the rate of hot water entering the water return system. A booster pump 9 may also be provided in the second water return pipe section 5 to increase the rate of return of cold water into the water tank 12. The addition of a pump is prior art and will not be described in detail herein.
The return water pipe section is connected with a cold water pipe 15, the cold water pipe 15 is connected with a cold water source, and a valve for opening the cold water pipe 15 can be arranged on the cold water pipe. The cold water pipe 15 may supply water to at least one of the water tank 12 and the water usage point 10. Specifically, as shown in fig. 1, the connection point of the cold water pipe 15 and the return water pipe is located downstream of the second check valve 7, i.e., between the second check valve 7 and the water tank 12, and at this time, the cold water pipe 15 supplies water to the water tank 12. Of course, it is also possible, as shown in fig. 2, that the connection point is located upstream of the second non return valve 7, and further, that the connection point is located between the second non return valve 7 and the second outlet pipe section 3, in which case the cold water pipe 15 can supply both the water tank 12 and the water usage point 10.
The first circulation circuit, i.e., at least one of the second outlet pipe section 3 and the first return pipe section 4, is provided with a water spot 10 such as a shower head or a washing faucet, but the water spot 10 may be provided in the intermediate pipe 1. When the user opens the water consumption point 10, the hot water in the first circulation system can flow into the water consumption point 10, so that the user can use the hot water at any time. In order to detect the water consumption of the user in time, a flow sensor may be provided at the water consumption point 10. The flow sensor is prior art and will not be described herein.
In order to enable the water return system to circulate timely and avoid unnecessary circulation of the water return system, the second water outlet pipe section 3, the first water return pipe section 4 or the intermediate pipe 1 are provided with a first temperature sensor 11. When the first temperature sensor 11 senses that the temperature of the water in the first circulation loop is lower than the preset temperature, the water return system starts circulation.
The embodiment also provides a water storage type water heater, which comprises a water tank 12 and the water return system, wherein the water inlet end of the water outlet pipe of the water return system and the water outlet end of the water return pipe are both connected with the water tank 12, hot water in the water tank 12 flows into the water return system from the water inlet end of the water outlet pipe, cold water in the water return system flows into the water tank 12 from the water outlet end of the water return pipe, the water tank 12, the water outlet pipe and the water return pipe are sequentially connected and enclose into an annular structure, and the annular structure forms a second circulation loop. The water storage type water heater has low energy consumption, and the water return system has little influence on the water temperature in the water tank 12.
In order to facilitate the determination of the opening degree of the water amount adjusting member, a second temperature sensor 13 is provided at the water outlet of the water tank 12. In order to accurately detect and control the temperature of water in the water tank 12, a third temperature sensor 14 is provided at the middle of the water tank 12. In this embodiment, the temperature sensor is a thermal bulb, but in other embodiments, the temperature sensor may be of other types.
In order to realize the automatic control of the water quantity regulating part, the first one-way valve 6 and the second one-way valve 7, the water storage type water heater also comprises a controller, and the flow sensor, the first temperature sensor 11, the second temperature sensor 13, the third temperature sensor 14, the water quantity regulating part, the first one-way valve 6 and the second one-way valve 7 are all electrically connected with the controller. The controller can be a centralized or distributed controller, for example, the controller can be an independent single-chip microcomputer or a plurality of distributed single-chip microcomputers, and a control program can be run in the single-chip microcomputers to control the flow sensor, the first temperature sensor 11, the second temperature sensor 13, the third temperature sensor 14, the water quantity regulating part, the first check valve 6 and the second check valve 7 to realize the functions.
The working process of the water storage type water heater that this embodiment still provided does:
step 1, a first temperature sensor 11 detects the water temperature in a first circulation loop and transmits a signal to a controller, the controller judges whether the water temperature is lower than a preset temperature, and if the water temperature is not lower than the preset temperature, the existing state is maintained; if the temperature is lower than the preset temperature, entering the step 2;
step 2, the controller controls and receives the water temperature in the water tank 12 detected by the second temperature sensor 13, selects the opening degree of the proportional control valve 8 according to the water temperature in the first circulation loop and the water temperature in the water tank 12, and opens the booster pump 9, the first check valve 6 and the second check valve 7;
step 3, detecting whether the water temperature in the first circulation loop reaches a preset temperature or not by the first temperature sensor 11, if so, closing the booster pump 9, the first one-way valve 6 and the second one-way valve 7; if not, the booster pump 9, the first one-way valve 6 and the second one-way valve 7 are continuously started until the water temperature in the first circulation loop reaches the preset temperature.
Example two
As shown in fig. 3 and 4, the second embodiment is different from the first embodiment in that the second check valve 7 is disposed on the first water return pipe section 4, the cold water pipe 15 is preferably disposed on the second water return pipe section 5, and the water return system may have a zero cold water function, and when the water return system does not perform the zero cold water function, the water return system has a function of adjusting the water temperature at the water usage point 10. Specifically, as shown in fig. 3, when the zero cold water function is performed, the cold water pipe 15 is closed, and the first check valve 6, the second check valve 7, and the water amount adjusting member are opened, thereby implementing the zero cold water function. As shown in fig. 4, when the user continues to use water, the cold water pipe 15 is opened, the cold water provided by the cold water pipe 15 enters the intermediate pipe 1 from the second water return pipe section 5, the hot water in the water tank 12 enters the first water outlet pipe section 2, and the ratio of the hot water to the cold water is adjusted by the water amount adjusting member to reach the water temperature required by the user.
As shown in fig. 5, the cold water pipe 15 may also be disposed in the first water return pipe section 4 and located between the middle pipe 1 and the second check valve 7, when the user continues to use water, the cold water pipe 15 is opened, the cold water provided by the cold water pipe 15 enters the middle pipe 1 from the first water return pipe section 4, the hot water in the water tank 12 enters the first water outlet pipe section 2, and the ratio of the hot water to the cold water is adjusted by the water amount adjusting member to reach the water temperature required by the user.
As shown in fig. 6, the cold water pipe 15 may also be disposed in the first water return pipe section 4 and between the second water outlet pipe section 3 and the second check valve 7, at this time, the cold water pipe 15 directly provides cold water for the water consumption point 10, when the user continues to consume water, the first check valve 6 and the second check valve 7 are closed, and the water temperature of the water consumption point 10 is adjusted by adjusting the amount of hot water. However, the adjustment effect of this arrangement is inferior to the two adjustment effects of fig. 4 and 5.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (9)

1. A water return system is characterized by comprising a middle pipe (1), a water outlet pipe and a water return pipe, wherein a hot water source, the water outlet pipe and the water return pipe are sequentially connected to form a loop;
the water inlet end of the middle pipe (1) is connected with the water return pipe, the water outlet end of the middle pipe (1) is connected with the water outlet pipe, and the water outlet pipe is divided into a first water outlet pipe section (2) connected with the hot water source and a second water outlet pipe section (3) connected with the water return pipe; the water return pipe is divided into a first water return pipe section (4) connected with the water outlet pipe and a second water return pipe section (5) connected with the hot water source;
the middle pipe (1) is provided with a first one-way valve (6) allowing water flow to a water outlet end of the middle pipe;
a second one-way valve (7) allowing water flow to the hot water source is arranged on the water return pipe;
the total length of the first water outlet pipe section (2) and the second water return pipe section (5) is equal to the total length of the second water outlet pipe section (3) and the first water return pipe section (4).
2. The water return system according to claim 1, characterized in that the first outlet pipe section (2) and/or the intermediate pipe (1) is/are provided with a water quantity adjusting element for adjusting the ratio of cold water and hot water entering the first outlet pipe section (2).
3. The water return system according to claim 2, characterized in that the water quantity regulating element is a proportional regulating valve (8) arranged at the junction of the first outlet pipe section (2), the intermediate pipe (1) and the second outlet pipe section (3).
4. The water return system according to claim 2, characterized in that a first water quantity regulating valve is arranged on the first water outlet pipe section (2), and a second water quantity regulating valve is arranged on the intermediate pipe (1).
5. The water return system according to claim 1, characterized in that a booster pump (9) is arranged on the second outlet pipe section (3) or the first water return pipe section (4).
6. The water return system of claim 1, wherein a cold water pipe (15) is connected to the water return pipe section, and the cold water pipe (15) is connected to a cold water source.
7. The water return system according to claim 1, characterized in that at least one of the second outlet pipe section (3), the first return pipe section (4) and the intermediate pipe (1) is provided with a useful water point (10), and the second outlet pipe section (3), the first return pipe section (4) or the intermediate pipe (1) is provided with a first temperature sensor (11).
8. A storage water heater, characterized by comprising a water tank (12) and a water return system according to any one of claims 1-7 communicating with the water tank (12).
9. A storage water heater according to claim 8, wherein a second temperature sensor (13) is provided at the outlet of the tank (12).
CN201911364521.4A 2019-12-26 2019-12-26 Water return system and water storage type water heater Active CN113048647B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911364521.4A CN113048647B (en) 2019-12-26 2019-12-26 Water return system and water storage type water heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911364521.4A CN113048647B (en) 2019-12-26 2019-12-26 Water return system and water storage type water heater

Publications (2)

Publication Number Publication Date
CN113048647A CN113048647A (en) 2021-06-29
CN113048647B true CN113048647B (en) 2022-08-16

Family

ID=76505894

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911364521.4A Active CN113048647B (en) 2019-12-26 2019-12-26 Water return system and water storage type water heater

Country Status (1)

Country Link
CN (1) CN113048647B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010249418A (en) * 2009-04-16 2010-11-04 Morihiro Kasamatsu Heat source water supply system
CN204611925U (en) * 2015-01-29 2015-09-02 东莞热道节能设备有限公司 A kind of hot water circuit supply system
CN106196571A (en) * 2016-07-06 2016-12-07 何家源 A kind of high-efficiency water-saving water heater

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1687653A (en) * 2005-04-30 2005-10-26 郝海鹏 All blast heating system of electricity-water internal circulation
US20140033993A1 (en) * 2012-08-06 2014-02-06 Irena Jozie McDowell Hydrogen gas buildup prevention in hot water heaters
CN103090440A (en) * 2013-02-19 2013-05-08 北京唯绿建筑节能科技有限公司 Thermal station energy saving device with double adjustment functions
KR101488472B1 (en) * 2013-08-23 2015-02-03 주식회사 경동나비엔 Drain device control system of waste heat using mixing valve and the mehtod thereof
CN205669880U (en) * 2016-06-01 2016-11-02 武汉华商低碳能源股份有限公司 A kind of anti-siphon open tank hot water apparatus
CN205678767U (en) * 2016-06-15 2016-11-09 北京同怀远洋科贸有限公司 Heat exchange station intelligent controlling device
CN207279949U (en) * 2017-06-15 2018-04-27 青岛海尔智能技术研发有限公司 A kind of electric heater
CN208222812U (en) * 2018-04-17 2018-12-11 广东史麦斯电器有限公司 A kind of storage-type electric water heater of zero cold water

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010249418A (en) * 2009-04-16 2010-11-04 Morihiro Kasamatsu Heat source water supply system
CN204611925U (en) * 2015-01-29 2015-09-02 东莞热道节能设备有限公司 A kind of hot water circuit supply system
CN106196571A (en) * 2016-07-06 2016-12-07 何家源 A kind of high-efficiency water-saving water heater

Also Published As

Publication number Publication date
CN113048647A (en) 2021-06-29

Similar Documents

Publication Publication Date Title
CN101701730B (en) Two-stage circulation and two-stage water distribution heat supply device
CN106969495A (en) Intelligent constant-temperature water-saving water heater and control method
CN106940091A (en) Zero cold water gas heater system
CN106091365A (en) A kind of Apparatus and method for keeping far point hot water constant temperature
CN113048647B (en) Water return system and water storage type water heater
CN201628366U (en) Gas water heater with a built-in circulation pump
CN111102740A (en) Wall-mounted furnace system capable of being used for heating and bathing simultaneously
CN216744898U (en) Water storage type constant temperature electric water heater for heating hot water pipeline terminal
CN205956444U (en) Automatic thermostatic water mixing valve
CN113606655B (en) Control method for multi-energy heat supply waterway multi-circulation system
US20220205682A1 (en) Smart circulation control instantaneous-heating storage heat exchanger
WO2021012832A1 (en) Heating and hot-water apparatus and control method therefor
CN201606961U (en) Circulating system for showering and water saving
CN112283948B (en) Gas heating water heater with zero cold water function
CN108759105A (en) A kind of control method of electric water heater and water heater
CN212081415U (en) Intelligent shower system
CN205425411U (en) Electric water heater
CN209558683U (en) It is distributed the heat storage type domestic hot-water circulatory system
CN111089325A (en) Boiler heat supply system and heat supply method thereof
TWM547648U (en) Heating control device of energy-saving and heat-storing electric water heater
CN207262520U (en) A kind of central hot-water system
CN111550917A (en) Improved constant temperature gas water heater
CN206656494U (en) Graphene carbon electric boiler
CN221076584U (en) Multi-return double-outlet water boiler central heating system
CN206055943U (en) Fast regulating temperature formula electric heater

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant