CN206191879U - Zero cold water gas heater and system thereof - Google Patents
Zero cold water gas heater and system thereof Download PDFInfo
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- CN206191879U CN206191879U CN201621142070.1U CN201621142070U CN206191879U CN 206191879 U CN206191879 U CN 206191879U CN 201621142070 U CN201621142070 U CN 201621142070U CN 206191879 U CN206191879 U CN 206191879U
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Abstract
The utility model discloses a zero cold water gas heater, it includes circulating water pump, water pump inlet tube, pump exhalent siphon, cold water pipe, cold water water inlet tap, hot water faucet, heat exchanger, first check valve, controller, first water flow sensor and second water flow sensor, cold water water inlet tap, cold water pipe, heat exchanger and hot water faucet communicate in proper order, the water pump inlet tube passes through circulating water pump and pump exhalent siphon are connected, and pump exhalent siphon and cold water piping connection and form first water pipe node in the junction, first water flow sensor installs in water pump inlet tube or pump exhalent siphon department, and one section cold water pipe department between first water pipe node and cold water water inlet tap is all installed to second water flow sensor and first check valve, circulating water pump, first water flow sensor all are connected with the controller electricity with second water flow sensor. The utility model discloses can correctly judge user's water, have good user experience and can practice thrift the electric energy and extension water pump life.
Description
Technical field
The utility model is related to gas utensil technical field, more particularly to a kind of zero cold water gas heater and its system.
Background technology
This shortcoming of running water can be flowed out first with water spot when in use in order to solve gas heater, occur in that at present
Zero cold water gas heater, the water circulation including being made up of water circulating pump and return pipe etc. heats pipeline, water circulation heating pipeline
One end and be connected the cold water inlet connection of heat exchanger, the other end of water circulation heating pipeline is with and with the combustion that is connected of water spot
Hot water outlet pipe's connection of gas water heater.Its operation principle is：When the water temperature in hot water outlet pipe is less than preset temperature, circulation
Water pump begins to work, by return pipe by the cold-water reflux in hot water outlet pipe to cold water inlet, and is entered by cold water
Water pipe enters into heat exchanger Zhang Jinhang heating, can so realize the preheating of the cold water in hot water outlet pipe, so that
User is in the water used with water spot by heating in advance.Additionally, existing zero cold water gas heater is also included located at described
Water flow sensor in cold water pipe, when user is in normal water utilizing process, has water flowing, at this moment water in the cold water pipe
The flow velocity of current can be changed into electric signal and electric signal is sent to the control that is electrically connected with water flow sensing unit by flow sensor
Device, then controller can judge there is water to flow in cold water pipe, show user with water, at this moment controller can control zero cold water
The heating work of gas heater, and the water after heating is sent to user's water spot, enable a user to just commonly use water.
But because the circulation heating tube of zero current cold water gas heater is connected with cold water inlet, and water-carrying capacity
Sensor is arranged on the one section of cold water water inlet between circulation heating tube and the connectivity part and the heat exchanger of cold water inlet
Guan Zhong, this can cause that circulation heating tube shares a water flow sensor with cold water inlet, when cold water preheating is carried out,
Water circulation heating pipeline has water to flow, and water flow sensor will produce water-flow signal；When user carries out bath water, cold water
Water inlet pipe also has water flowing, and water flow sensor can also produce water-flow signal；Such that controller is difficult to sentence exactly
Break and the water flowing of user's cold water pipe caused by bath water or water circulation heating is carried out, so that when user needs
Zero cold water gas heater may carry out water circulation heating on the contrary during with water so that user can not just commonly use water (because working as
User also when carrying out water circulation and heating, can be caused with water spot and pipeline in zero cold water gas heater during with water
Hydraulic pressure is not sufficiently stable, simultaneously as the unstable control program that can also cause zero cold water gas heater of hydraulic pressure in pipeline is answered
It is miscellaneous, so that sequential operation easily malfunctions and causes the water heater working unstable), and then have impact on the experience of user；
And user can waste electric energy with water water pump also if work, while also have impact on the working life of water pump.
Utility model content
Regarding to the issue above, the purpose of this utility model is to provide a kind of situation that can correctly judge user's water
So as to there is good Consumer's Experience and electric energy can be saved and extend zero cold water gas heater of water pump service life with
And zero cold water gas heater system.
To achieve these goals, the utility model provide a kind of zero cold water gas heater, it include water circulating pump,
Pump water inlet, pumping line, cold water pipe, cold water water inlet tap, hot water effluent's mouth, heat exchanger, the first check valve, control
Device, the first water flow sensor and the second water flow sensor；The cold water pipe is connected with the cold water water inlet tap, and described
Cold water pipe is connected with the water inlet end of the heat exchanger；The water side of the heat exchanger connects with hot water effluent's mouth；Institute
Stating the first end of pump water inlet is used to be connected with hot water effluent's mouth, the second end and the circulation of the pump water inlet
The water inlet end connection of water pump；The first end of the pumping line is connected with the water side of the water circulating pump, and the water pump
Second end of outlet pipe is connected to form the first water pipe node with the cold water pipe；First water flow sensor is installed on described
At pump water inlet or at the pumping line, second water flow sensor is mounted on institute with first check valve
State at one section of cold water pipe between the first water pipe node and the cold water water inlet tap；The entrance of first check valve is cold with described
Water water inlet tap is connected, and the outlet of first check valve is connected with the first water pipe node；The water circulating pump, described first
Water flow sensor is electrically connected with second water flow sensor with the controller.
Preferably, the zero cold water gas heater also includes the 3rd check valve；3rd check valve is arranged on described
At pumping line, and the entrance of the 3rd check valve is connected with the first end of the pumping line, and the described 3rd is unidirectional
The outlet of valve is connected with the second end of the pumping line；Or, the 3rd check valve is arranged on the pump water inlet
Place, and the entrance of the 3rd check valve connect with the first end of the pump water inlet, the outlet of the 3rd check valve and
The second end connection of the pump water inlet.
Preferably, the zero cold water gas heater also include hot water storage tank, the water inlet end of the hot water storage tank with
The water side connection of the heat exchanger, the water side of the hot water storage tank connects with hot water effluent's mouth.
Preferably, the zero cold water gas heater also includes the backwater mouth for being connected with hot water effluent's mouth, institute
Backwater mouth is stated to be connected with the first end of the pump water inlet.
The utility model additionally provides the first zero cold water gas heater system, including the first running water pipe, second are certainly
Come water pipe, the mouth of a river from the beginning, the water mixing valve of at least one connection water spot, the 4th check valve, backwater connecting tube, hot water outlet pipe,
Connecting tube and zero cold water gas heater as described above；The backwater mouth is by the connecting tube and the cold water water inlet tap
Connection；The hot water mouth of the water mixing valve is connected by the hot water outlet pipe with hot water effluent's mouth, the hot water outlet pipe
It is connected with first running water pipe by the backwater connecting tube for being provided with the 4th check valve；4th check valve
Entrance connected with the hot water outlet pipe, the outlet of the 4th check valve is connected with first running water pipe；It is described mixed
The cold water outlet of water valve is connected with one end of first running water pipe, and the other end of first running water pipe is with described second certainly
Carry out one end connection of water pipe, the other end of second running water pipe is connected with the cold water water inlet tap；The mouth of a river from the beginning is equal
It is connected with first running water pipe and second running water pipe.
The utility model additionally provides second zero cold water gas heater systems, including the first running water pipe, second are certainly
Come water pipe, the mouth of a river from the beginning, the water mixing valve of at least one connection water spot, backwater connecting tube, hot water outlet pipe and as described above
Zero cold water gas heater；The hot water mouth of the water mixing valve is connected by the hot water outlet pipe with hot water effluent's mouth,
The hot water outlet pipe is connected by the backwater connecting tube with the backwater mouth；The cold water outlet of the water mixing valve and described first
One end connection of running water pipe, the other end of first running water pipe is connected with the mouth of a river from the beginning, second running water
One end of pipe is connected with the cold water water inlet tap, and the other end of second running water pipe is connected with the mouth of a river from the beginning.
Preferably, the first end of the pump water inlet is connected with the cold water pipe to form the second water pipe node, described
Second water pipe node is located at one end cold water pipe between the cold water water inlet tap and the first water pipe node, second water
Flow sensor is specifically to be mounted on being located at the first water pipe node and the second water pipe section with first check valve
At one section of cold water pipe between point.
The utility model additionally provides the third zero cold water gas heater system, including the first running water pipe, second are certainly
Come water pipe, the mouth of a river from the beginning, the water mixing valve of at least one connection water spot, the 4th check valve, backwater connecting tube, hot water outlet pipe with
And zero cold water gas heater as described above；The hot water mouth of the water mixing valve is gone out by the hot water outlet pipe with the hot water
Water nozzle is connected, the hot water outlet pipe by the backwater connecting tube that is provided with the 4th check valve with described first originally
Water pipe is connected；The entrance of the 4th check valve is connected with the hot water outlet pipe, the outlet of the 4th check valve with it is described
First running water pipe is connected；The cold water outlet of the water mixing valve is connected with one end of first running water pipe, and described first originally
The other end of water pipe is connected with one end of second running water pipe, and the other end and the cold water of second running water pipe enter
Water nozzle is connected；The mouth of a river from the beginning is connected with first running water pipe and second running water pipe.
Further, the zero cold water gas heater also includes that connecting tube, second be installed at the connecting tube are single
Backwater mouth to valve and for being connected with hot water effluent's mouth, the backwater mouth is by the connecting tube and positioned at described
One section of cold water pipe connection between two water pipe nodes and the cold water water inlet tap；The entrance of second check valve and the backwater
Mouth is connected, and the outlet of second check valve is connected with the cold water water inlet tap.
The utility model additionally provides the 4th kind of zero cold water gas heater system, including the first running water pipe, second are certainly
Come water pipe, the mouth of a river from the beginning, the water mixing valve of at least one connection water spot, backwater connecting tube, hot water outlet pipe and as described above
Zero cold water gas heater；The hot water mouth of the water mixing valve is connected by the hot water outlet pipe with hot water effluent's mouth,
The hot water outlet pipe is connected by the backwater connecting tube with the backwater mouth；The cold water outlet of the water mixing valve and described first
One end connection of running water pipe, the other end of first running water pipe is connected with the mouth of a river from the beginning, second running water
One end of pipe is connected with the cold water water inlet tap, and the other end of second running water pipe is connected with the mouth of a river from the beginning.
The zero cold water gas heater and the zero cold water gas heater system that the utility model is provided, pass through
The first end of the pumping line is connected with the water side of the water circulating pump, and by the second end of the pumping line
It is connected to form the first water pipe node with the cold water pipe, and the cold water pipe passes through the heat exchanger and hot water effluent's mouth
Connection, and first water flow sensor is installed at the pump water inlet or at the pumping line；So when
For the pump water inlet, the water circulating pump, the pumping line, the cold water that are connected with hot water effluent's mouth
(the water circulating pump work when water circulation heating pipeline that pipe, the heat exchanger and hot water effluent's mouth are constituted works
Make), be sprayed onto the water come in from the pump water inlet in the pumping line by the water circulating pump, then by described cold
Water pipe enters into and heating is circulated in the heat exchanger, and this when, first water flow sensor can produce current
Signal, but second water flow sensor does not produce water-flow signal (because the entrance of first check valve and institute
The connection of cold water water inlet tap is stated, the outlet of first check valve is connected with the first water pipe node, and first check valve
It is installed at one section of cold water pipe between the first water pipe node and the cold water water inlet tap, so the pumping line stream
The water for going out is can not to be flowed back to the direction of the cold water water inlet tap, therefore is installed on the first water pipe node and the cold water
Second water flow sensor at the cold water pipe between water inlet tap would not produce water-flow signal), the at this moment control
Device processed will judge that the zero cold water gas heater carries out water circulation heating；And when user needs to use water, at this moment without
Whether worked by the water circulating pump, the cold water water inlet tap has water and flows into and reach the heat exchange by the cold water pipe
Device heat and after the heating from hot water effluent's mouth outflow, so that the cold water pipe has water to flow, it is at this moment described
Second water flow sensor will produce water-flow signal, and the controller judges that user uses according to the water-flow signal
Water, then the controller allows the water circulating pump to be stopped, and the controller is sensed according to first water-carrying capacity
Device calculates the total water current amount of the zero cold water gas heater, Ran Housuo with the water-flow signal of second water flow sensor
State the heating work that controller controls the zero cold water gas heater according to the total water current amount so that user can just commonly use
Water, overcomes and cause sequential operation easily zero cold water combustion gas heat caused by error because single current quantity sensor control program is complicated
The problem of hydrophone job insecurity, therefore the utility model has good Consumer's Experience；And because pass through second water
Flow sensor just allows the water circulating pump to be stopped when judging user with water, can save electric energy and extension institute
State the service life of water circulating pump.
Brief description of the drawings
In order to illustrate more clearly of the technical solution of the utility model, below will be attached to what is used needed for implementation method
Figure is briefly described, it should be apparent that, drawings in the following description are only some implementation methods of the present utility model, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is a kind of structural representation of zero cold water gas heater that the utility model embodiment is provided；
Fig. 2 is the structural representation of another zero cold water gas heater that the utility model embodiment is provided；
Fig. 3 is the structural representation of another zero cold water gas heater that the utility model embodiment is provided；
Fig. 4 is a kind of structural representation of zero cold water gas heater system that the utility model embodiment is provided；
Fig. 5 is another structural representation of zero cold water gas heater system shown in Fig. 4；
Fig. 6 is the structural representation of another zero cold water gas heater system that the utility model embodiment is provided；
Fig. 7 is the structural representation of another zero cold water gas heater system that the utility model embodiment is provided；
Fig. 8 is the structural representation of another zero cold water gas heater system that the utility model embodiment is provided.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of the utility model protection.
Fig. 1, Fig. 2 and Fig. 3 are referred to, on the one hand the utility model provides a kind of zero cold water gas heater, including follows
Ring water pump 1, pump water inlet 2, pumping line 3, cold water pipe 4, cold water water inlet tap 5, hot water effluent's mouth 6, heat exchanger 7,
One check valve 8, controller 9, the first water flow sensor 10 and the second water flow sensor 11；The cold water pipe 4 with it is described
Cold water water inlet tap 5 is connected, and the cold water pipe 4 is connected with the water inlet end of the heat exchanger 7；The water outlet of the heat exchanger 7
End connects with hot water effluent's mouth 6；The first end of the pump water inlet 2 is used to be connected with hot water effluent's mouth 6, described
Second end of pump water inlet 2 is connected with the water inlet end of the water circulating pump 1；The first end of the pumping line 3 with it is described
The water side connection of water circulating pump 1, and the second end of the pumping line 3 is connected the first water pipe of formation with the cold water pipe 4
Node；First water flow sensor 10 is installed at the pump water inlet 2 or at the pumping line 3, and described
Two water flow sensors 11 and first check valve 8 be mounted on the first water pipe node and the cold water water inlet tap 5 it
Between one section of cold water pipe 4 at；The entrance of first check valve 8 is connected with the cold water water inlet tap, first check valve 8
Outlet is connected with the first water pipe node；The water circulating pump 1, first water flow sensor 10 and second current
Quantity sensor 11 is electrically connected with the controller 9.
Preferably, Fig. 1 is referred to, the zero cold water gas heater also includes the 3rd check valve 30, and the described 3rd is unidirectional
Valve 30 is installed at the pumping line 3；3rd check valve 30 is arranged at the pumping line 3, and described the
The entrance of three check valves 30 is connected with the first end of the pumping line 3, the outlet of the 3rd check valve 30 and the water
The second end connection of water pump outlet pipe 3；Or, the 3rd check valve 30 is arranged at the pump water inlet 2, and the described 3rd
The entrance of check valve 30 is connected with the first end of the pump water inlet 2, the outlet of the 3rd check valve 30 and the water pump
The second end connection of water inlet pipe 2.Can so prevent water from flowing to the water by the pump water inlet 2 from the cold water pipe 4
Pump water inlet pipe 2, it is described so as to allow current more intensively to be flowed to by the cold water pipe 4 being connected with the cold water water inlet tap 5
Heat exchanger 7.
Preferably, Fig. 1, Fig. 2 and Fig. 3 are referred to, the zero cold water gas heater also includes hot water storage tank 31, described
The water inlet end of hot water storage tank 31 is connected with the water side of the heat exchanger 7, the water side of the hot water storage tank 31 and institute
Hot water effluent's mouth 6 is stated to connect.So from the hot water out of the heat exchanger 7 be temporarily stored in the hot water storage tank 31
Hot water mixed, the range of temperature of hot water effluent's mouth 6 hot water out is reduced, so as to avoid the heat
The water out of water faucet 6 is sometimes hot and sometimes cold, and then improves the experience of user.It should be noted that the hot water water storage
Can connect logical by one or more pipelines between case 31 and the heat exchanger 7, the hot water storage tank 31 with it is described
Can be by one or many with pipeline communication between hot water effluent's mouth 6, it is not specifically limited herein.
In the utility model embodiment, by going out the first end of the pumping line 3 and the water circulating pump 1
Water end (W.E.) is connected, and the second end of the pumping line 3 is connected to form the first water pipe node with the cold water pipe 4, and described
Cold water pipe 4 is connected by the heat exchanger 7 with hot water effluent's mouth 6, and first water flow sensor 10 is installed
At the pump water inlet 2 or at the pumping line 3；So described in connected with hot water effluent's mouth 6
Pump water inlet 2, the water circulating pump 1, the pumping line 3, the cold water pipe 4, the heat exchanger 7 and the heat
When the water circulation heating pipeline that water faucet 6 is constituted works (water circulating pump 1 works), the water circulating pump 1 will be from institute
State the water that pump water inlet 2 comes in be sprayed onto in the pumping line 3, then entering into the heat by the cold water pipe 4 hands over
It is circulated heating, this when in parallel operation 7, first water flow sensor 10 can produce water-flow signal, but described
Two water flow sensors 11 do not produce water-flow signal (because the entrance and the cold water water inlet tap of first check valve 8
Connection, the outlet of first check valve connects with the first water pipe node, and first check valve 8 is installed on described the
At one section of cold water pipe 4 between one water pipe node and the cold water water inlet tap 5, so the water of the outflow of the pumping line 3 is
Can not be flowed back to the direction of the cold water water inlet tap 5, therefore be installed on the first water pipe node with the cold water water inlet tap 5
Between the cold water pipe 4 at second water flow sensor 11 would not produce water-flow signal), the at this moment controller
9 will judge that the zero cold water gas heater carries out water circulation heating；And when user needs to use water, at this moment no matter institute
State whether water circulating pump 1 works, the cold water water inlet tap 5 has water and flows into and reach the heat exchange by the cold water pipe 4
Device 7 is heated and flowed out from hot water effluent's mouth 6 after the heating, so that the cold water pipe 4 has water to flow, at this moment institute
Stating the second water flow sensor will produce water-flow signal, and the controller 9 judges user just according to the water-flow signal
With water, then the controller 9 allows the water circulating pump 1 to be stopped, and the controller 9 is according to first current
Quantity sensor 10 calculates total water of the zero cold water gas heater with the water-flow signal of second water flow sensor 11
Flow, then heating work of the controller 9 according to the total water current amount control zero cold water gas heater so that use
Family can just commonly use water, overcome and caused because single current quantity sensor control program is complicated caused by the easy error of sequential operation
The unstable problem of zero cold water gas water heater working, therefore the utility model has good Consumer's Experience；And it is because logical
Crossing when second water flow sensor 11 judges user with water just allows the water circulating pump 1 to be stopped, Ke Yijie
About electric energy and extend the service life of the water circulating pump 1.
For the ease of to understanding of the present utility model, herein, there is provided some preferred embodiments of the present utility model：
The first preferred embodiment：
Fig. 1 is referred to, the zero cold water gas heater also includes the backwater mouth for being connected with hot water effluent's mouth 6
13, the backwater mouth 13 is connected with the first end of the pump water inlet 2.
In the preferred embodiment, by will be used for the backwater mouth 13 that is connected with hot water effluent's mouth 6 with it is described
The first end connection of pump water inlet 2, so described backwater mouth 13, the pump water inlet 2, the water circulating pump 1, the water
Water pump outlet pipe 3, the cold water pipe 4, the heat exchanger 7 and hot water effluent's mouth 6 may be constructed water circulation heating pipeline,
So that the zero cold water gas heater has the function that water circulation is heated.
Second preferred embodiment：
Fig. 2 is referred to, the first end of the pump water inlet 2 is connected with the cold water pipe 4 to form the second water pipe node,
The second water pipe node is located at one section of cold water pipe 4 between the cold water water inlet tap 5 and the first water pipe node, described
Second water flow sensor 11 and first check valve 8 are specifically to be mounted on being located at the first water pipe node with described the
At one section of cold water pipe 4 between two water pipe nodes.
In the preferred embodiment, it is connected with the cold water pipe 4 to be formed by by the first end of the pump water inlet 2
Second water pipe node, so when the pump water inlet 2 being connected with the cold water pipe 4 is connected by with the cold water pipe 4
The cold water water inlet tap 5 when being connected with hot water effluent's mouth 6, the cold water water inlet tap 5, the pump water inlet 2, institute
Stating water circulating pump 1, the pumping line 3, the cold water pipe 4, the heat exchanger 7 and hot water effluent's mouth 6 can be with
Constitute water circulation heating pipeline so that the zero cold water gas heater has the function that water circulation is heated.
The third preferred embodiment is provided on the basis of second preferred embodiment：
Refer to Fig. 3, the zero cold water gas heater also includes connecting tube 14, be installed at the connecting tube 14 the
Two check valves 15 and the backwater mouth 13 for being connected with hot water effluent's mouth 6, the backwater mouth 13 is by the connecting tube
14 and one section of cold water pipe 4 between the second water pipe node and the cold water water inlet tap 5 connect；Second check valve
15 entrance is connected with the backwater mouth 13, and the outlet of second check valve 15 is connected with the cold water water inlet tap 5.
In the preferred embodiment, it is connected with the cold water pipe 4 to be formed by by the first end of the pump water inlet 2
Second water pipe node, and the backwater mouth 13 entered with positioned at the second water pipe node by the connecting tube 14 with the cold water
One section of cold water pipe 4 between water nozzle 5 is connected；So when the pump water inlet 2 being connected with the cold water pipe 4 be by with institute
The cold water water inlet tap 5 of the connection of cold water pipe 4 is stated when being connected with hot water effluent's mouth 6, it is the cold water water inlet tap 5, described
Pump water inlet 2, the water circulating pump 1, the pumping line 3, the cold water pipe 4, the heat exchanger 7 and the heat
Water faucet 6 may be constructed water circulation heating pipeline；Or be when the pump water inlet 2 be by the backwater mouth 13 come
When being connected with hot water effluent's mouth 6, the backwater mouth 13, the connecting tube 14, the pump water inlet 2, the recirculated water
Pump 1, the pumping line 3, the cold water pipe 4, the heat exchanger 7 and hot water effluent's mouth 6 may be constructed water and follow
Ring heats pipeline；Therefore cause that the zero cold water gas heater has the function of water circulation heating simultaneously by this preferred embodiment
Can allow user according to actual conditions carry out water circulation heat pipeline design, improve the experience of user.
On the other hand the utility model provides a kind of zero cold water gas heater system, refers to Fig. 4, including first from
Come water pipe 20, the second running water pipe 21, the mouth of a river from the beginning 22, the water mixing valve 23 of at least one connection water spot, the 4th check valve 24,
Backwater connecting tube 25, hot water outlet pipe 26, connecting tube 14 and the zero cold water gas and hot water as described in the first preferred embodiment
Device；The backwater mouth 13 is connected by the connecting tube 14 with the cold water water inlet tap 5；The hot water mouth of the water mixing valve 23 passes through
The hot water outlet pipe connects with hot water effluent's mouth 6, and the hot water outlet pipe is by being provided with the 4th check valve 24
The backwater connecting tube 25 be connected with first running water pipe 20；The entrance of the 4th check valve 24 goes out with the hot water
Water pipe 26 is connected, and the outlet of the 4th check valve 24 is connected with first running water pipe 20；The cold water of the water mixing valve 23
Mouthful it is connected with one end of first running water pipe 20, the other end of first running water pipe 20 and second running water pipe
21 one end connection, the other end of second running water pipe 21 is connected with the cold water water inlet tap 5；The mouth of a river from the beginning 22 is equal
It is connected with first running water pipe 20 and second running water pipe 21.
In the utility model embodiment, the hot water outlet pipe 26 connected with hot water effluent's mouth 6 is by installing
The backwater connecting tube 25 for having the 4th check valve 24 is connected with first running water pipe 20, and first running water
Pipe 20 is connected by second running water pipe 21 with the cold water water inlet tap 5, so described hot water outlet pipe 26, the backwater
Connecting tube 25, first running water pipe 20, second running water pipe 21, the cold water water inlet tap 5, the connecting tube 14,
Backwater mouth 13, the pump water inlet 2, the water circulating pump 1, the pumping line 3, the cold water pipe 4, the heat exchange
Device 7 and hot water effluent's mouth 6 may be constructed water circulation heating pipeline so that the zero cold water gas heater system has
The function of water circulation heating, i.e., ought be arranged on temperature biography that is in the hot water outlet pipe 26 and electrically connect with the controller 9
When the water temperature that sensor detects in the hot water outlet pipe 26 is less than default requirement, the controller 9 will control described following
The startup of ring water pump 1 so that the water in the hot water outlet pipe 26 constantly passes through backwater connecting tube 25, first running water pipe
20th, second running water pipe 21, the cold water water inlet tap 5, the connecting tube 14, backwater mouth 13, the pump water inlet 2,
The water circulating pump 1, the pumping line 3, the cold water pipe 4 enter into the heat exchanger 7 and are heated, and in heating
Flowed out from hot water effluent's mouth 6 afterwards, so as to realize the circulating-heating of the water in hot water outlet pipe 26.And working as user needs to use water
When, at this moment no matter whether the water circulating pump 1 works, and the cold water water inlet tap 5 has water and flows into and arrived by the cold water pipe 4
Heated up to the heat exchanger 7 and flowed out from hot water effluent's mouth 6 after the heating, so that the cold water pipe 4 has
Water flows, and at this moment second water flow sensor will produce water-flow signal, and the controller 9 according to the water-flow signal
Judge that user uses water, then the controller 9 allows the water circulating pump 1 to be stopped, and the basis of the controller 9
First water flow sensor 10 calculates the zero cold water combustion gas with the water-flow signal of second water flow sensor 11
The total water current amount of water heater, then the controller 9 according to the total water current amount control the zero cold water gas heater plus
Thermal technology makees so that user can just commonly use water, overcomes and sequential operation is caused because single current quantity sensor control program is complicated
The unstable problem of zero cold water gas water heater working caused by easily malfunctioning, therefore the utility model has good user's body
Test；And because just allow the water circulating pump 1 to stop when judging user with water by second water flow sensor 11
Only work, electric energy can be saved and extend the service life of the water circulating pump 1.
It should be noted that Fig. 5 is referred to, the connection in the zero cold water gas heater system of the present embodiment
Pipe can be removed, and at this moment, second running water pipe 21 can directly be connected (i.e. described second running water with the backwater mouth 13
Pipe 21 is no longer connected with the cold water water inlet tap 5)；So described hot water outlet pipe 26, the backwater connecting tube 25, described first
It is running water pipe 20, second running water pipe 21, the backwater mouth 13, the pump water inlet 2, the water circulating pump 1, described
Pumping line 3, the cold water pipe 4, the heat exchanger 7 and hot water effluent's mouth 6 may be constructed water circulation heating tube
Road so that the zero cold water gas heater system has the function that water circulation is heated, i.e., ought be arranged on the hot water outlet pipe
Water temperature that is in 26 and being detected with the temperature sensor that the controller 9 is electrically connected in the hot water outlet pipe 26 is less than default
Requirement when, the controller 9 will control the startup of the water circulating pump 1 so that the water in the hot water outlet pipe 26 is not
It is open close to cross backwater connecting tube 25, first running water pipe 20, second running water pipe 21, the backwater mouth 13, the water
Pump water inlet pipe 2, the water circulating pump 1, the pumping line 3, the cold water pipe 4 enter into the heat exchanger 7 and are added
Heat, and flow out from hot water effluent's mouth 6 after the heating, so as to realize the circulating-heating of the water in the hot water outlet pipe 26.
After water in the hot water outlet pipe 26 realizes circulating-heating, when user with water spot when the water mixing valve 23 is opened, water is used
Point outflow can pass through the water for heating first, and at this moment the running water in the mouth of a river from the beginning 22 can also be by described second originally
Water pipe 21, backwater mouth 13, the pump water inlet 2, the water circulating pump 1, the pumping line 3, the cold water pipe 4 enter
Heated to the heat exchanger 7, and be flowed into the hot water outlet pipe 26 from hot water effluent's mouth 6 after the heating,
Then again by being connected with the hot water outlet pipe 26 with water spot outflow, so as to realize the continuous supply of hot water.Therefore this reality
Applying example can realize the function of the cold water of gas heater zero, overcome because the water in the hot water outlet pipe 26 can not add in advance
Heat and cause to flow out the shortcoming that temperature does not reach the running water of bathing requirement first during user's use, so as to improve
The bathing experience of user.
On the other hand the utility model provides a kind of zero cold water gas heater system again, refers to Fig. 6, including first
Running water pipe 20, the second running water pipe 21, the mouth of a river from the beginning 22, the water mixing valve 23 of at least one connection water spot, backwater connecting tube
25th, hot water outlet pipe and the zero cold water gas heater as described in the first preferred embodiment；The hot water of the water mixing valve 23
Mouth is connected by the hot water outlet pipe with hot water effluent's mouth 6, and the hot water outlet pipe is by the backwater connecting tube 25
It is connected with the backwater mouth 13；The cold water outlet of the water mixing valve 23 is connected with one end of first running water pipe 20, and described
The other end of one running water pipe 20 is connected with the mouth of a river from the beginning 22, and one end and the cold water of second running water pipe 21 enter
Water nozzle 5 is connected, and the other end of second running water pipe 21 is connected with the mouth of a river from the beginning 22.
In the utility model embodiment, the hot water outlet pipe connected with hot water effluent's mouth 6 is returned by described
Water connecting tube 25 is connected with the backwater mouth 13, so described hot water outlet pipe, the backwater connecting tube 25, the backwater mouth
13rd, the pump water inlet 2, the water circulating pump 1, the pumping line 3, the cold water pipe 4, the heat exchanger 7 with
And hot water effluent's mouth 6 may be constructed water circulation heating pipeline so that there is the zero cold water gas heater system water to follow
The function of ring heating, i.e., ought be arranged on temperature sensor that is in the hot water outlet pipe 26 and being electrically connected with the controller 9
When detecting the water temperature in the hot water outlet pipe 26 less than default requirement, the controller 9 will control the recirculated water
The startup of pump 1 so that the water in the hot water outlet pipe 26 is constantly entered by backwater connecting tube 25, backwater mouth 13, the water pump
Water pipe 2, the water circulating pump 1, the pumping line 3, the cold water pipe 4 enter into the heat exchanger 7 and are heated, and
Flowed out from hot water effluent's mouth 6 after the heating, so as to realize the circulating-heating of the water in hot water outlet pipe 26.And working as user needs
When using water, at this moment no matter whether the water circulating pump 1 works, and the cold water water inlet tap 5 has water and flows into and by described cold
Water pipe 4 reaches the heat exchanger 7 and is heated and flowed out from hot water effluent's mouth 6 after the heating, so that described cold
Water pipe 4 has water to flow, and at this moment second water flow sensor will produce water-flow signal, and the controller 9 according to this
Water-flow signal judges that user uses water, and then the controller 9 allows the water circulating pump 1 to be stopped, and the control
Device processed 9 calculates described zero according to first water flow sensor 10 with the water-flow signal of second water flow sensor 11
The total water current amount of cold water gas heater, then the controller 9 is according to the total water current amount control zero cold water combustion gas warm
The heating work of hydrophone so that user can just commonly use water, overcomes and is caused because single current quantity sensor control program is complicated
The unstable problem of zero cold water gas water heater working caused by the easy error of sequential operation, therefore the utility model is with good
Consumer's Experience；And because the circulation is just allowed when judging user with water by second water flow sensor 11
Water pump 1 is stopped, and can save electric energy and extend the service life of the water circulating pump 1.
On the other hand the utility model provides a kind of zero cold water gas heater system again, refers to Fig. 7, including first
Running water pipe 20, the second running water pipe 21, the mouth of a river from the beginning 22, the water mixing valve 23 of at least one connection water spot, the 4th check valve
24th, backwater connecting tube 25, hot water outlet pipe and the zero cold water gas heater as described in second preferred embodiment；It is described mixed
The hot water mouth of water valve 23 is connected by the hot water outlet pipe with hot water effluent's mouth 6, and the hot water outlet pipe is by installing
The backwater connecting tube 25 for having the 4th check valve 24 is connected with first running water pipe 20；4th check valve 24
Entrance connected with the hot water outlet pipe 26, the outlet of the 4th check valve 24 is connected with first running water pipe 20；
The cold water outlet of the water mixing valve 23 is connected with one end of first running water pipe 20, the other end of first running water pipe 20
One end with second running water pipe 21 is connected, and the other end of second running water pipe 21 connects with the cold water water inlet tap 5
Connect；The mouth of a river from the beginning 22 is connected with first running water pipe 20 and second running water pipe 21.
In the utility model embodiment, the hot water outlet pipe connected with hot water effluent's mouth 6 is by being provided with
The backwater connecting tube 25 of the 4th check valve 24 is connected with first running water pipe 20, with first running water pipe
The other end of second running water pipe 21 of 20 connections is connected with the cold water water inlet tap 5；So when the pump water inlet 2
Be by the cold water water inlet tap 5 being connected with the cold water pipe 4 to be connected with hot water effluent's mouth 6 when, the hot water goes out
Water pipe, the backwater connecting tube 25, first running water pipe 20, second running water pipe 21, the cold water water inlet tap 5,
The pump water inlet 2, the water circulating pump 1, the pumping line 3, the cold water pipe 4, the heat exchanger 7 and institute
State hot water effluent's mouth 6 and may be constructed water circulation heating pipeline so that there is the zero cold water gas heater system water circulation to add
The function of heat, i.e., ought be arranged on temperature sensor that is in the hot water outlet pipe 26 and electrically connect with the controller 9 and detect
When being less than default requirement to the water temperature in the hot water outlet pipe 26, the controller 9 will control the water circulating pump 1
Start so that water in the hot water outlet pipe 26 is constantly by backwater connecting tube 25, first running water pipe 20, described the
Two running water pipes 21, the cold water water inlet tap 5, the pump water inlet 2, the water circulating pump 1, the pumping line 3, institute
State cold water pipe 4 and enter into the heat exchanger 7 and heated, and flow out from hot water effluent's mouth 6 after the heating, so as to realize
The circulating-heating of the water in hot water outlet pipe 26.And when user needs to use water, at this moment no matter the water circulating pump 1 whether work
Make, the cold water water inlet tap 5 have water flow into and by the cold water pipe 4 reach the heat exchanger 7 heated and plus
Flowed out from hot water effluent's mouth 6 after heat, so that the cold water pipe 4 has water to flow, at this moment second water-carrying capacity is sensed
Device will produce water-flow signal, and the controller 9 judges user with water, the then control according to the water-flow signal
Device processed 9 allows the water circulating pump 1 to be stopped, and the controller 9 according to first water flow sensor 10 with it is described
The water-flow signal of the second water flow sensor 11 calculates the total water current amount of the zero cold water gas heater, then the control
Device 9 controls the heating work of the zero cold water gas heater according to the total water current amount so that user can just commonly use water, gram
Take and cause sequential operation easily zero cold water gas heater caused by error because single current quantity sensor control program is complicated
The problem of job insecurity, therefore the utility model has good Consumer's Experience；And because by second water-carrying capacity
Sensor 11 just allows the water circulating pump 1 to be stopped when judging user with water, can save electric energy and extension institute
State the service life of water circulating pump 1.
On the other hand the utility model additionally provides a kind of zero cold water gas heater system, refers to Fig. 8, including first
Running water pipe 20, the second running water pipe 21, the mouth of a river from the beginning 22, the water mixing valve 23 of at least one connection water spot, backwater connecting tube
25th, hot water outlet pipe and the zero cold water gas heater as described in the third preferred embodiment；The hot water of the water mixing valve 23
Mouth is connected by the hot water outlet pipe with hot water effluent's mouth 6, and the hot water outlet pipe is by the backwater connecting tube 25
It is connected with the backwater mouth 13；The cold water outlet of the water mixing valve 23 is connected with one end of first running water pipe 20, and described
The other end of one running water pipe 20 is connected with the mouth of a river from the beginning 22, and one end and the cold water of second running water pipe 21 enter
Water nozzle 5 is connected, and the other end of second running water pipe 21 is connected with the mouth of a river from the beginning 22.
In the utility model embodiment, the hot water outlet pipe connected with hot water effluent's mouth 6 is returned by described
Water connecting tube 25 is connected with the backwater mouth 13, so described hot water outlet pipe, the backwater connecting tube 25, the backwater mouth
13rd, the connecting tube 14, the pump water inlet 2, the water circulating pump 1, the pumping line 3, the cold water pipe 4, institute
State heat exchanger 7 and hot water effluent's mouth 6 may be constructed water circulation heating pipeline so that the zero cold water gas heater
System has the function that water circulation is heated, i.e., ought be arranged in the hot water outlet pipe 26 and be electrically connected with the controller 9
Temperature sensor when detecting water temperature in the hot water outlet pipe 26 less than default requirement, the controller 9 will be controlled
Make the startup of the water circulating pump so that water in the hot water outlet pipe 26 constantly by backwater connecting tube 25, backwater mouth 13,
The connecting tube 14, the pump water inlet 2, the water circulating pump 1, the pumping line 3, the cold water pipe 4 are entered into
The heat exchanger 7 is heated, and is flowed out from hot water effluent's mouth 6 after the heating, so as in realizing hot water outlet pipe 26
Water circulating-heating.And when user needs to use water, at this moment no matter whether the water circulating pump 1 works, the cold water water inlet
Mouth 5 has water and flows into and reach the heat exchanger 7 by the cold water pipe 4 and heated and gone out from the hot water after the heating
Water nozzle 6 flows out, so that the cold water pipe 4 has water to flow, at this moment second water flow sensor will produce current to believe
Number, and the controller 9 judges user with water according to the water-flow signal, and then the controller 9 allows the circulation
Water pump 1 is stopped, and the controller 9 is according to first water flow sensor 10 and second water flow sensor
11 water-flow signal calculates the total water current amount of the zero cold water gas heater, and then the controller 9 is according to total water
Flow controls the heating work of the zero cold water gas heater so that user can just commonly use water, overcomes because single current amount
Sensor control program is complicated and cause sequential operation easily zero cold water gas water heater working be unstable caused by error to ask
Topic, therefore the utility model has good Consumer's Experience；And because judged by second water flow sensor 11
User with water when just allow the water circulating pump 1 to be stopped, can save electric energy and extend the water circulating pump 1 makes
Use the life-span.
, it is necessary to explanation, first check valve 8, the second check valve the 15, the 3rd are single in the utility model embodiment
Can be for one or multiple to the check valve 24 of valve 30 and the 4th, it is not specifically limited herein.The pumping line 3
Can be connected with the cold water pipe 4 by three-way connection, the pumping line 3 and the cold water pipe 4 can also be one into
Type is connected, and is also not specifically limited herein.
The above, specific embodiment only of the present utility model, but protection domain of the present utility model do not limit to
In this, any those skilled in the art in technical scope disclosed in the utility model, the change that can be readily occurred in
Change or replace, should all cover within protection domain of the present utility model.Therefore, protection domain of the present utility model should be with described
Scope of the claims is defined.
Claims (10)
1. a kind of zero cold water gas heater, including water circulating pump, pump water inlet, pumping line, cold water pipe, cold water water inlet
Mouth, hot water effluent's mouth, heat exchanger and controller, it is characterised in that also including the first water flow sensor and the second water
Flow sensor；
The cold water pipe is connected with the cold water water inlet tap, and the cold water pipe is connected with the water inlet end of the heat exchanger；Institute
The water side for stating heat exchanger connects with hot water effluent's mouth；
The first end of the pump water inlet is used to be connected with hot water effluent's mouth, the second end of the pump water inlet and institute
State the water inlet end connection of water circulating pump；
The first end of the pumping line is connected with the water side of the water circulating pump, and the pumping line the second end
It is connected to form the first water pipe node with the cold water pipe；First water flow sensor be installed at the pump water inlet or
At the pumping line, second water flow sensor is mounted on the first water pipe node with first check valve
At one section of cold water pipe between the cold water water inlet tap；The entrance of first check valve is connected with the cold water water inlet tap,
The outlet of first check valve is connected with the first water pipe node；
The water circulating pump, first water flow sensor are electrically connected with second water flow sensor with the controller
Connect.
2. zero cold water gas heater according to claim 1, it is characterised in that also including for the hot water effluent
The backwater mouth of mouth connection, the backwater mouth is connected with the first end of the pump water inlet.
3. zero cold water gas heater according to claim 1, it is characterised in that the first end of the pump water inlet with
To form the second water pipe node, the second water pipe node is located at the cold water water inlet tap and described first for the cold water pipe connection
At one section of cold water pipe between water pipe node；Second water flow sensor is specifically to be mounted on first check valve
At one section of cold water pipe between the first water pipe node and the second water pipe node.
4. zero cold water gas heater according to claim 3, it is characterised in that also including connecting tube, be installed on it is described
The second check valve at connecting tube and the backwater mouth for being connected with hot water effluent's mouth, the backwater mouth pass through the company
Adapter and the connection of one section of cold water pipe between the second water pipe node and the cold water water inlet tap；Second check valve
Entrance connected with the backwater mouth, the outlet of second check valve is connected with the cold water water inlet tap.
5. zero cold water gas heater according to claim 1, it is characterised in that also including the 3rd check valve；Described
Three check valves are arranged at the pumping line, and entrance and the pumping line of the 3rd check valve first end
Connection, the outlet of the 3rd check valve is connected with the second end of the pumping line；Or,
3rd check valve be arranged on the pump water inlet at, and the 3rd check valve entrance and the water feeding of water pump
The first end connection of pipe, the outlet of the 3rd check valve is connected with the second end of the pump water inlet.
6. the gas heater according to any one of Claims 1 to 5, it is characterised in that described also including hot water storage tank
The water inlet end of hot water storage tank is connected with the water side of the heat exchanger, the water side of the hot water storage tank and the hot water
Faucet is connected.
7. a kind of zero cold water gas heater system, it is characterised in that including the first running water pipe, the second running water pipe, originally
The mouth of a river, the water mixing valve of at least one connection water spot, the 4th check valve, backwater connecting tube, hot water outlet pipe, connecting tube and such as
Zero cold water gas heater described in claim 2；The backwater mouth is connected by the connecting tube with the cold water water inlet tap；
The hot water mouth of the water mixing valve is connected by the hot water outlet pipe with hot water effluent's mouth, and the hot water outlet pipe is led to
Cross and the backwater connecting tube of the 4th check valve is installed is connected with first running water pipe；4th check valve
Entrance is connected with the hot water outlet pipe, and the outlet of the 4th check valve is connected with first running water pipe；
The cold water outlet of the water mixing valve is connected with one end of first running water pipe, the other end of first running water pipe with
One end connection of second running water pipe, the other end of second running water pipe is connected with the cold water water inlet tap；It is described
The mouth of a river from the beginning is connected with first running water pipe and second running water pipe.
8. a kind of zero cold water gas heater system, it is characterised in that including the first running water pipe, the second running water pipe, originally
The mouth of a river, the water mixing valve of at least one connection water spot, backwater connecting tube, hot water outlet pipe and as claimed in claim 2 zero
Cold water gas heater；
The hot water mouth of the water mixing valve is connected by the hot water outlet pipe with hot water effluent's mouth, and the hot water outlet pipe is led to
The backwater connecting tube is crossed to be connected with the backwater mouth；
The cold water outlet of the water mixing valve is connected with one end of first running water pipe, the other end of first running water pipe with
The mouth of a river from the beginning connection, one end of second running water pipe is connected with the cold water water inlet tap, second running water pipe
The other end connected with the mouth of a river from the beginning.
9. a kind of zero cold water gas heater system, it is characterised in that including the first running water pipe, the second running water pipe, originally
The mouth of a river, the water mixing valve of at least one connection water spot, the 4th check valve, backwater connecting tube, hot water outlet pipe and as right will
Seek zero cold water gas heater described in 3；
The hot water mouth of the water mixing valve is connected by the hot water outlet pipe with hot water effluent's mouth, and the hot water outlet pipe is led to
Cross and the backwater connecting tube of the 4th check valve is installed is connected with first running water pipe；4th check valve
Entrance is connected with the hot water outlet pipe, and the outlet of the 4th check valve is connected with first running water pipe；
The cold water outlet of the water mixing valve is connected with one end of first running water pipe, the other end of first running water pipe with
One end connection of second running water pipe, the other end of second running water pipe is connected with the cold water water inlet tap；It is described
The mouth of a river from the beginning is connected with first running water pipe and second running water pipe.
10. a kind of zero cold water gas heater system, it is characterised in that including the first running water pipe, the second running water pipe, originally
The mouth of a river, the water mixing valve of at least one connection water spot, backwater connecting tube, hot water outlet pipe and as claimed in claim 4 zero
Cold water gas heater；
The hot water mouth of the water mixing valve is connected by the hot water outlet pipe with hot water effluent's mouth, and the hot water outlet pipe is led to
The backwater connecting tube is crossed to be connected with the backwater mouth；
The cold water outlet of the water mixing valve is connected with one end of first running water pipe, the other end of first running water pipe with
The mouth of a river from the beginning connection, one end of second running water pipe is connected with the cold water water inlet tap, second running water pipe
The other end connected with the mouth of a river from the beginning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621142070.1U CN206191879U (en) | 2016-10-20 | 2016-10-20 | Zero cold water gas heater and system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621142070.1U CN206191879U (en) | 2016-10-20 | 2016-10-20 | Zero cold water gas heater and system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206191879U true CN206191879U (en) | 2017-05-24 |
Family
ID=58731801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621142070.1U Withdrawn - After Issue CN206191879U (en) | 2016-10-20 | 2016-10-20 | Zero cold water gas heater and system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206191879U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106369807A (en) * | 2016-10-20 | 2017-02-01 | 广东万和新电气股份有限公司 | Zero-cold-water gas water heater and system thereof |
| CN107420971A (en) * | 2017-07-27 | 2017-12-01 | 安徽信息工程学院 | A kind of solar energy shower device |
| CN107860120A (en) * | 2017-12-01 | 2018-03-30 | 信宜市家加美不锈钢制品有限公司 | One kind is saved water and energy combustion gas shower system and its control method |
| CN109631320A (en) * | 2018-10-31 | 2019-04-16 | 中山市恒乐电器有限公司 | A kind of zero cold water gas heater with water tank |
| CN110207388A (en) * | 2018-10-26 | 2019-09-06 | 华帝股份有限公司 | Intelligent shutdown control method for gas water heater |
| CN111520912A (en) * | 2020-04-08 | 2020-08-11 | 吴小洪 | Zero-cold-water heater system |
-
2016
- 2016-10-20 CN CN201621142070.1U patent/CN206191879U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106369807A (en) * | 2016-10-20 | 2017-02-01 | 广东万和新电气股份有限公司 | Zero-cold-water gas water heater and system thereof |
| CN106369807B (en) * | 2016-10-20 | 2019-07-16 | 广东万和新电气股份有限公司 | Zero cold water gas heater of one kind and its system |
| CN107420971A (en) * | 2017-07-27 | 2017-12-01 | 安徽信息工程学院 | A kind of solar energy shower device |
| CN107860120A (en) * | 2017-12-01 | 2018-03-30 | 信宜市家加美不锈钢制品有限公司 | One kind is saved water and energy combustion gas shower system and its control method |
| CN110207388A (en) * | 2018-10-26 | 2019-09-06 | 华帝股份有限公司 | Intelligent shutdown control method for gas water heater |
| CN109631320A (en) * | 2018-10-31 | 2019-04-16 | 中山市恒乐电器有限公司 | A kind of zero cold water gas heater with water tank |
| CN111520912A (en) * | 2020-04-08 | 2020-08-11 | 吴小洪 | Zero-cold-water heater system |
| CN111520912B (en) * | 2020-04-08 | 2021-06-15 | 江苏诺温特热能设备有限公司 | Zero-cold-water heater system |
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| AV01 | Patent right actively abandoned |
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