CN205980345U - Hot water circulating device - Google Patents
Hot water circulating device Download PDFInfo
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- CN205980345U CN205980345U CN201620827139.8U CN201620827139U CN205980345U CN 205980345 U CN205980345 U CN 205980345U CN 201620827139 U CN201620827139 U CN 201620827139U CN 205980345 U CN205980345 U CN 205980345U
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Abstract
The utility model relates to a hot water circulating device, it includes controller, cold water pipe, flow sensor, circulating pipe, gas heater, electric water heater, water pump, a temperature sensor, the 2nd temperature sensor, first ooff valve and second switch valve. The utility model discloses hot water circulating device can be be effectively utilized to realize that the user can acquire the hot water of high temperature more, use hot water and uninterruptedly to use hot water immediately.
Description
Technical field
This utility model is related to hot water facility field, more particularly to a kind of hot water circulating device.
Background technology
Existing hot water circulating device generally includes gas heater, circulating pump, circulating water pipe and electric heater, electric hot water
Device is provided with water inlet and outlet, and the two ends of circulating water pipe are connected to water inlet and the outlet of electric heater, gas heater
Outlet be connected with the water inlet of electric heater, circulating water pipe arranges multiple outlets.The hot water circulating device of this structure
Although zero cold water function can be realized, have the drawback that：The water of gas heater is all supply after electric heater
To user, heat can be disperseed, lead to water temperature will not very high it is impossible to meet some demands of user；Further, since electric heater
Water be all through gas heater, when gas heater can not normally use, above-mentioned hot water circulating device just cannot be to
User provides hot water.In order to solve the defect that existing hot water circulating device exists, the application changes to hot water circulating device
Enter.
Utility model content
Technical problem to be solved in the utility model is to provide for a kind of hot water circulating device, and it can be effectively utilized
Hot water at higher temperature can be obtained, immediately use hot water and incessantly using hot water to realize user.
Above-mentioned technical problem is solved by the following technical programs：
A kind of hot water circulating device, including controller, cold water pipe, flow transducer, circulating water pipe, gas heater, electricity
Water heater, water pump, the first temperature sensor, second temperature sensor, first switch valve and second switch valve；
Described cold water pipe is provided with cold water inlet, the first supply outlet, the second supply outlet and multiple colod-application water and goes out
The mouth of a river, the first supply outlet is located between cold water inlet and multiple colod-application water outlet；
Described flow transducer be arranged on cold water pipe and be located at first supply outlet and multiple colod-application water outlet it
Between；
Described electric heater is provided with the first water inlet and the first outlet, and the first water inlet passes through first switch valve connection the
One supply outlet；
Described circulating water pipe is sequentially provided with the first water inlet of hot water, the second water inlet of hot water, multiple hot water outlet and
Individual water return outlet, corresponding the first water inlet connecting electric heater of the first water inlet of hot water, water return outlet, the first outlet；
Described gas heater is provided with the second water inlet and the second outlet, and the second water inlet passes through the second electromagnetic valve connection
Second supply outlet, the second outlet connects the second water inlet of hot water；
Described first temperature sensor is used for detecting the water temperature of the second outlet of gas heater；
Described water pump is on circulating water pipe, and is located between water return outlet and multiple hot water outlet；
Described second temperature sensor located at circulating water pipe and is located between water pump and multiple hot water outlet；
Described controller electrical connection flow transducer, electric heater, water pump, the first temperature sensor, second temperature sensing
Device, first switch valve and second switch valve.
Wherein in an embodiment, described hot water circulating device also includes operation control panel, operation control panel and control
Device carries out data communication by electric lines of force.
Wherein in an embodiment, described hot water circulating device also includes wireless telecommunication module and mobile terminal,
Wireless telecommunication module is electrically connected with the controller, and wireless telecommunication module is connected with mobile terminal wireless telecommunications.
Wherein in an embodiment, described hot water circulating device also includes the first check valve；First check valve is located at following
On ring water pipe and positioned between the first water inlet of hot water and the second water inlet of hot water.
Wherein in an embodiment, described hot water circulating device also includes the second check valve；Second check valve is located at following
On ring water pipe and positioned between water return outlet and water pump.
Wherein in an embodiment, described electric heater is provided with storage tank and the 3rd temperature sensing in storage tank
Device, liquid level sensor, controller electrical connection three-temperature sensor, liquid level sensor.
Wherein in an embodiment, described hot water circulating device also includes the indicator being connected with controller.
Wherein in an embodiment, described gas heater is additionally provided with air inlet；Described hot water circulating device also includes
The 3rd switch valve being connected with controller, it is used for being arranged on the Gas Pipe being connected with air inlet.
Wherein in an embodiment, described second supply outlet is located at the first supply outlet and several colod-application water
Between outlet.
Wherein in an embodiment, described first switch valve and described second switch valve are electromagnetic valve.
Hot water circulating device described in the utility model compared with prior art, has the advantages that：
Due to gas heater, electric heater being arranged on the circulating water pipe being provided with multiple hot water outlets, and according to stream
Quantity sensor controlling the operation of gas heater, electric heater, in user's water by gas heater without electric heater
Ground directly hot-water supply, realizes user and can obtain hot water at higher temperature, gas heater when user's water can not be normal
When heating, can change by electric heater hot-water supply it is ensured that user can be incessantly using hot water；By arranging recirculated water
On pipe, setting second temperature sensor and water pump, can guarantee when user is without water that the coolant-temperature gage in circulating water pipe meets each
The coolant-temperature gage of individual hot water water end (W.E.) requires, so that user can timely use hot water, realizes the function of zero cold water.Therefore, originally
Hot water circulating device described in utility model can be effectively utilized to be realized user and can obtain hot water at higher temperature, immediately use
Hot water and incessantly using hot water.
Brief description
Fig. 1 is the structural representation of hot water circulating device；
A kind of flow chart of the control method of Fig. 2 hot water circulating device；
Another kind of flow chart of the control method of Fig. 3 hot water circulating device.
Specific embodiment
In the description of the present application, term " first ", " second " are only used for describing purpose, by multiple attribute identical skills
Art feature makes a distinction, and it is not intended that indicating or imply relative importance or implying the technical characteristic indicated by indicating
Quantity.Thus, define " first ", the feature of " second " can be expressed or implicitly include this technology one or more
Feature.Unless otherwise stated, " multiple " are meant that two or more.
In the description of the present application, unless otherwise clearly defined and limited, term " located at ", " connection " should do broad sense reason
Solution is for example, it may be being fixedly connected or being detachably connected or integral；Can be to be mechanically connected or electricity
Connect；Can be to be joined directly together or there are centering elements.For the ordinary skill in the art, can be managed with concrete condition
Solve above-mentioned term concrete meaning in this application.
As shown in figure 1, a kind of hot water circulating device, including controller 1, cold water pipe 2, flow transducer 3, circulating water pipe 4,
Gas heater 5, electric heater 6, water pump 7, the first temperature sensor 8, second temperature sensor 9, first switch valve 10 and
Two switch valves 11；
Cold water pipe 2 is provided with cold water inlet 21, first supply outlet 22, second supply outlet 23 and multiple colod-application water
Outlet 24, the first supply outlet 22 is located between cold water inlet 21 and multiple colod-application water outlet 24；
Flow transducer 3 is arranged on cold water pipe 2 and is located at the first supply outlet 22 and multiple colod-application water outlet 24
Between；
Electric heater 6 is provided with the first water inlet 61 and the first outlet 62, and the first water inlet 61 passes through first switch valve 10
Connection the first supply outlet 22；
Circulating water pipe 4 is sequentially provided with the first water inlet of hot water 41, the second water inlet of hot water 42, multiple hot water outlet 43 and
One water return outlet 44, the first water inlet of hot water 41, water return outlet 44 be corresponding to be connected the first water inlet 61 of electric heater 6, first goes out
The mouth of a river 62；
Gas heater 5 is provided with the second water inlet 51 and the second outlet 52, and the second water inlet 51 passes through second switch valve
11 connection the second supply outlets 23, the second outlet 52 connects the second water inlet of hot water 42；
First temperature sensor 8 is used for detecting the water temperature of the second outlet 52 of gas heater 5；
Water pump 7 is on circulating water pipe 4, and is located between water return outlet 44 and multiple hot water outlet 43；
Second temperature sensor 9 located at circulating water pipe 4 and is located between water pump 7 and multiple hot water outlet 43；It is will
Second temperature sensor 9 is arranged on along current direction and farthest uses the rear of water end (W.E.) it can be ensured that the coolant-temperature gage in circulating water pipe 4 is full
The coolant-temperature gage of each hot water water end (W.E.) of foot requires；
Controller 1 electrical connection flow transducer 3, electric heater 6, water pump 7, the first temperature sensor 8, second temperature sensing
Device 9, first switch valve 10 and second switch valve 11.
Wherein in an embodiment, the second supply outlet 23 is located at the first supply outlet 22 and several colod-application water
Between outlet 24.In actual design, the second supply outlet 23 can be between cold water inlet 21 and flow transducer 3
Setting.
Wherein in an embodiment, first switch valve 10 and second switch valve 11 can be electromagnetic valve.
Wherein, above-mentioned hot water circulating device also includes the first check valve 12, the first check valve 12 on circulating water pipe 4 simultaneously
Between the first water inlet of hot water 41 and the second water inlet of hot water 42, to prevent water from flowing backwards toward in electric heater 6.
Wherein, above-mentioned hot water circulating device also includes the second check valve 13, the second check valve 13 on circulating water pipe 4 simultaneously
Between water return outlet 44 and water pump 7, to prevent water from flowing backwards toward in water pump 7, thus avoiding damaging water pump 7.
Above-mentioned electric heater 6 is the same with existing electric heater, is designed with storage tank 63 and adding in storage tank 63
Warmware 64, three-temperature sensor 65.Controller 1 electrical connection heating member 64, three-temperature sensor 65.
Because the hot water circulating device of the application is in the case that gas heater 5 is unable to normal heating running, Ke Yiti
For carrying out hot-water supply by electric heater 6, in order to better control over the running of electric heater 6, in this application one specifically real
Apply in example, above-mentioned electric heater 6 is additionally provided with the liquid level sensor 66 in storage tank 63, controller 1 electrically connects level sensing
Device 66.
Wherein, above-mentioned hot water circulating device also includes the 3rd switch valve 14 and Gas Pipe 15, and above-mentioned gas heater 5 also sets
There is air inlet 53, Gas Pipe 15 connects with being connected air inlet 53, the 3rd switch valve 14 connects in Gas Pipe 15 and with controller 1
Connect.
Wherein, above-mentioned hot water circulating device also includes the indicator 16 being connected with controller 1, can not be just in gas heater
When often heating, controller 1 controls indicator 16 to carry out bulletin.Indicator 16 can be voice bulletin, or voice and display
Combination bulletin.
Wherein, above-mentioned hot water circulating device also includes the control command input module 30 being connected with controller 1 communication.User
Can carry out inputting control command by control command input module 30, with the use of control device.
Wherein in an embodiment, control command input module 30 includes operation control panel 31, operation control panel 31 with
Controller 1 carries out data communication by electric lines of force.This embodiment can reduce wiring, can also be arranged on operation control panel 17
At any one plug indoor, using flexible.
Wherein in an embodiment, control command input module 30 includes wireless telecommunication module 32 and mobile terminal
33, wireless telecommunication module 32 is electrically connected with controller 1, and wireless telecommunication module 32 is with mobile terminal 33 wireless telecommunications even
Connect.This embodiment can realize this device of remotely control, brings great convenience to the use of user.Wireless telecommunication module
32 can be GPRS communication module or 4G communication module or 3G communication module.
In this application, controller 1, cold water pipe 2, flow transducer 3, circulating water pipe 4, gas heater 5, electric heater
6th, water pump 7, the first temperature sensor 8, second temperature sensor 9, first switch valve 10 and second switch valve 11 can adopt phase
The existing device answered.
Above-mentioned hot water circulating device, when using, the cold water inlet 21 of cold water pipe 2 is connected to running water pipe, by cold water
Multiple hot water outlets 43 of the multiple colod-application water outlet 24 of pipe 2 and circulating water pipe 4 are connected to multiple water mixing valve 17
Hot and cold water inlet.
As shown in Fig. 2 the control method of above-mentioned hot water circulating device, comprise the following steps：
Step 100：Start；
Step 101：Judging whether the detected value of flow transducer 3 is more than the first preset value A, if being more than, going to step
102, if being not more than, go to step 105；
Step 102：First switch valve 10 is opened, and the first temperature sensor 8 and gas heater 5 work；Water pump 7 stops,
Second switch valve 11 closes；Subsequently into step 103；This step 102 represents once user carries out using water by water mixing valve, just by
Gas heater 5 carries out running and supplies water；In this step process, electric heater 6 does not heat, second temperature sensor 9 is not detected as
Most preferably；
Step 103：Judging whether the detected value of the first temperature sensor 8 is more than the second preset value B, if being more than, going to step
Rapid 101, if being not more than, go to step 104；
Step 104：First switch valve 10 cuts out, and second switch valve 11 is opened, and electric heater 6 carries out heating running, goes to
Step 108；This step represents that gas heater 5 decommissions when user is with water and when gas heater 5 breaks down,
Change and running water supply is carried out by electric heater 6；
Step 105：Including sub-step 1051, sub-step 1051 is：Judge whether the detected value of second temperature sensor 9 is big
In the 3rd preset value C, if being more than, going to step 106, if being not more than, going to step 107；
Step 106：Water pump 7 stops, and goes to step 108；This step represents that the current direction along circulating water pipe 4 farthest uses water
The coolant-temperature gage at end reaches requirement, that is, represent that each reaches requirement with the coolant-temperature gage of water end (W.E.), can be no longer necessary to in circulating water pipe 4
Water carry out warm-up cycle；
Step 107：Water pump 7 is opened, that is, enter warm-up cycle, go to step 101；This step represents along circulating water pipe 4
Current direction farthest is not up to require with the coolant-temperature gage of water end (W.E.), needs to carry out warm-up cycle to the water in circulating water pipe 4；
Step 108：Terminate.
The control method of above-mentioned hot water circulating device, based on above-mentioned hot water circulating device, can by flow transducer 3
Judge whether user uses water, in user's water, by gas heater 5 without the direct hot-water supply in electric heater 6 ground, can make
Obtain user and obtain hot water at higher temperature；When gas heater 5 occurring when user's water and is unable to normal heating, can change by
Electric heater 6 hot-water supply is it is ensured that user can be incessantly using hot water；When user is without water, by electric heater 6, second
Temperature sensor 9 and water pump 7 is operated it is ensured that the coolant-temperature gage in circulating water pipe 4 meets the water temperature of each hot water water end (W.E.)
Degree requires, so that user can timely use hot water, realizes the function of zero cold water.
Therefore, above-mentioned hot water circulating device can be effectively utilized and to realize user and can obtain hot water at higher temperature, i.e.
When using hot water with incessantly using hot water.
Wherein in an embodiment, in above-mentioned steps 104, indicator can also be included before going to step 108
16 carry out bulletin.
Wherein in an embodiment, in above-mentioned steps 105, before sub-step 1051, also include sub-step
1051’：Electric heater 6 is carried out with the running of liquid level, lower water temperature.The present embodiment passes through to arrange in step 105 sub-step
1051 ', carry out while with respect to " liquid level, lower water temperature are carried out to electric heater 6 " and " being circulated by water pump 7 ", can
To reduce the operation of water pump 7, reducing energy consumption；It may also be ensured that there being the abundant water yield of uniform temperature in electric heater 6, such that it is able to
Preferably meet the situation using electric heater 6 hot-water supply.
Wherein, sub-step 1051 ' is preferably the running that electric heater 6 is carried out with first liquid level regulation, rear lower water temperature, specifically
Including：
Step 1511：Judging whether the detected value of liquid level sensor 66 is more than the 4th preset value D1, if being more than, going to step
Rapid 1515, if being not more than, go to step 1512；
Step 1512：Second switch valve 11 is opened；Then go to step 1513；
Step 1513：Judge whether the detected value of liquid level sensor 66 is more than the 5th preset value D2, the 5th preset value D2 ＞
4th preset value D1, if being more than, goes to step 1514, if being not more than, goes to step 1512；
Step 1514：Second switch valve 11 cuts out, and goes to step 1511；
Step 1515：Judging whether the detected value of three-temperature sensor 65 is more than the 6th preset value E1, if being more than, turning
To sub-step 1051, if being not more than, go to step 1516；
Step 1516：Electric heater 6 carries out heating running, and water pump 7 stops；Then go to step 1517；
Step 1517：Judge whether the detected value of three-temperature sensor 65 is more than the 7th preset value E2, the 7th preset value
E2 ＞ the 6th preset value E1, if being more than, goes to step 1518, if being not more than, goes to step 1516；
Step 1518：Electric heater 6 stops heating, and water pump 7 stops, and goes to step 1515.
Certainly, sub-step 1051 ' can be that electric heater 6 is carried out simultaneously with the running of liquid level regulation, lower water temperature.
First preset value A, the second preset value B, the 3rd preset value C, the 4th preset value D1, the 5th preset value D2, the 6th pre-
If value E1 and the equal ＞ 0 of the 7th preset value E2, respective specific size can be set with realizing the technology of the present invention effect by practical application
Fixed；Here provides some suitable spans, A：1L/min-1.2L/min；B：60℃-65℃；C：35℃-38℃；D1：1/
The total height of the liquid-retaining volume of 2 electric heaters 6；D2：The total height of the liquid-retaining volume of electric heater 6；E1：42℃-
45℃；E2：70℃-75℃.
Wherein in an embodiment, when above-mentioned steps 105 include sub-step 1051 and do not include sub-step 1051 ',
Also included sub-step 1051 before sub-step 1051 "：Analyse whether to need to enter warm-up cycle, if desired then go to sub-step
1051, if not needing, go to step 101.
Wherein in an embodiment, as shown in figure 3, when above-mentioned steps 105 include sub-step 1051 and sub-step 1051 '
When, above-mentioned steps 105 also included sub-step 1051 before sub-step 1051 ' "：Analyse whether to need to enter warm-up cycle, if
Needing, go to sub-step 1051 ', if not needing, going to step 101.
Above-mentioned two embodiment, is mainly in view of the situation that some places can will not use water in one section of longer time,
By setting up sub-step 1051 ", can avoid frequently carrying out water temperature control to the water in circulating water pipe 4.
As to whether needing to enter implementing of warm-up cycle, Ke Yishi：By above-mentioned control command input module 30
In controller 1, setting needs to enter the corresponding conditionses of warm-up cycle, for example, it is desired to enter the time period of warm-up cycle, at this
Time period just can enter warm-up cycle.
In the particular content of above-mentioned specific embodiment, each technical characteristic can carry out arbitrarily reconcilable combination, is
Make description succinct, all possible combination is not all described to each technical characteristic above-mentioned, as long as however, these technical characteristics
Combination there is not contradiction, be all considered to be this specification record scope.
The particular content of above-mentioned specific embodiment only have expressed several embodiments of the present utility model, and its description is more
Concrete and detailed, but therefore can not be interpreted as the restriction to this utility model the scope of the claims.It should be pointed out that for this
For the those of ordinary skill in field, without departing from the concept of the premise utility, can also make and some deform and change
Enter, these broadly fall into protection domain of the present utility model.Therefore, the protection domain of this utility model patent should be wanted with appended right
Ask and be defined.
Claims (10)
1. a kind of hot water circulating device it is characterised in that：Including controller (1), cold water pipe (2), flow transducer (3), circulation
Water pipe (4), gas heater (5), electric heater (6), water pump (7), the first temperature sensor (8), second temperature sensor
(9), first switch valve (10) and second switch valve (11)；
Described cold water pipe (2) is provided with cold water inlet (21), the first supply outlet (22), the second supply outlet (23) and many
Individual colod-application water outlet (24), the first supply outlet (22) is located at cold water inlet (21) and multiple colod-application water outlet (24)
Between；
Described flow transducer (3) is arranged on cold water pipe (2) and above and positioned at the first supply outlet (22) and multiple colod-application water goes out
Between the mouth of a river (24)；
Described electric heater (6) is provided with the first water inlet (61) and the first outlet (62), and the first water inlet (61) passes through first
Switch valve (10) connection first supply outlet (22)；
Described circulating water pipe (4) is sequentially provided with the first water inlet of hot water (41), the second water inlet of hot water (42), multiple hot water effluent
Mouth (43) and a water return outlet (44), the first water inlet of hot water (41), water return outlet (44) are corresponding to connect the first of electric heater (6)
Water inlet (62), the first outlet (61)；
Described gas heater (5) is provided with the second water inlet (51) and the second outlet (52), and the second water inlet (51) passes through the
Two switch valves (11) connection second supply outlet (23), the second outlet (52) connects the second water inlet of hot water (42)；
Described first temperature sensor (8) is used for detecting the water temperature of second outlet (52) of gas heater (5)；
Described water pump (7) is on circulating water pipe (4), and is located between water return outlet (44) and multiple hot water outlet (43)；
Described second temperature sensor (9) located at circulating water pipe (4) and be located at water pump (7) and multiple hot water outlet (43) it
Between；
Described controller (1) electrical connection flow transducer (3), electric heater (6), water pump (7), the first temperature sensor (8), the
Two temperature sensors (9), first switch valve (10) and second switch valve (11).
2. hot water circulating device according to claim 1 it is characterised in that：Described hot water circulating device also includes operation control
Making sheet (31), operation control panel (31) and controller (1) carry out data communication by electric lines of force.
3. hot water circulating device according to claim 1 it is characterised in that：Described hot water circulating device also includes wirelessly
Remote communication module (32) and mobile terminal (33), wireless telecommunication module (32) is electrically connected with controller (1), wireless remote
Communication module (32) is connected with mobile terminal (33) wireless telecommunications.
4. the hot water circulating device according to claims 1 to 3 any one it is characterised in that：Described hot water circulating device
Also include the first check valve (12)；First check valve (12) above and is located at the first water inlet of hot water (41) located at circulating water pipe (4)
And the second water inlet of hot water (42) between.
5. the hot water circulating device according to claims 1 to 3 any one it is characterised in that：Described hot water circulating device
Also include the second check valve (13)；Second check valve (13) above and is located at water return outlet (44) and water pump (7) located at circulating water pipe (4)
Between.
6. the hot water circulating device according to claims 1 to 3 any one it is characterised in that：Described electric heater (6) sets
There are storage tank (63) and the three-temperature sensor (65) in storage tank (63), liquid level sensor (66), controller (1) electricity
Connect three-temperature sensor (65), liquid level sensor (66).
7. the hot water circulating device according to claims 1 to 3 any one it is characterised in that：Described hot water circulating device
Also include the indicator (16) being connected with controller (1).
8. the hot water circulating device according to claims 1 to 3 any one it is characterised in that：Described gas heater (5)
It is additionally provided with air inlet (53)；Described hot water circulating device also includes the 3rd switch valve (14) being connected with controller (1), and it is used for
It is arranged in the Gas Pipe (15) being connected with air inlet (53).
9. the hot water circulating device according to claims 1 to 3 any one it is characterised in that：Described second supply water outlet
Mouth (23) is located between the first supply outlet (22) and several colod-application water outlets (24).
10. the hot water circulating device according to claims 1 to 3 any one it is characterised in that：Described first switch valve
And described second switch valve (11) is electromagnetic valve (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620827139.8U CN205980345U (en) | 2016-07-29 | 2016-07-29 | Hot water circulating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620827139.8U CN205980345U (en) | 2016-07-29 | 2016-07-29 | Hot water circulating device |
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| Publication Number | Publication Date |
|---|---|
| CN205980345U true CN205980345U (en) | 2017-02-22 |
Family
ID=58029578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620827139.8U Active CN205980345U (en) | 2016-07-29 | 2016-07-29 | Hot water circulating device |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106247625A (en) * | 2016-07-29 | 2016-12-21 | 广东万和新电气股份有限公司 | Hot water circulating device and control method thereof |
| CN107272435A (en) * | 2017-07-31 | 2017-10-20 | 上海工程技术大学 | The multiple utilization control system of water circulation based on smart home |
-
2016
- 2016-07-29 CN CN201620827139.8U patent/CN205980345U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106247625A (en) * | 2016-07-29 | 2016-12-21 | 广东万和新电气股份有限公司 | Hot water circulating device and control method thereof |
| CN106247625B (en) * | 2016-07-29 | 2022-04-08 | 广东万和新电气股份有限公司 | Hot water circulating device and control method thereof |
| CN107272435A (en) * | 2017-07-31 | 2017-10-20 | 上海工程技术大学 | The multiple utilization control system of water circulation based on smart home |
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