CN107883573A - Air energy heat pump - Google Patents
Air energy heat pump Download PDFInfo
- Publication number
- CN107883573A CN107883573A CN201711139348.9A CN201711139348A CN107883573A CN 107883573 A CN107883573 A CN 107883573A CN 201711139348 A CN201711139348 A CN 201711139348A CN 107883573 A CN107883573 A CN 107883573A
- Authority
- CN
- China
- Prior art keywords
- water
- water storage
- storage cavity
- tank
- heat pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
Abstract
The invention discloses a kind of air energy heat pump, it is advantageous that water in the higher water tank of water storage water temperature and not needing magnetic valve frequent switching.A kind of air energy heat pump, including multiple water tanks and connected compressor and evaporator, the compressor is provided with connected heating tube, the heating tube is by inside water tank, one end that the heating tube passes water tank is provided with restricting element, each water tank is provided with water inlet and delivery port, the water inlet and delivery port are respectively equipped with water intaking valve and outlet valve, the inside of the water tank is provided with the water storage cavity of annular, two pieces are provided with the water storage cavity can move in a circle and the movable sealing plate closed with water storage cavity side along water storage cavity, water storage cavity is separated to form two regions by two blocks of movable sealing plates, in the water storage cavity temperature sensor is provided with close to water outlet end, the heating tube penetrates in water tank and is located proximate to water outlet.
Description
Technical field
The present invention relates to temperature adjusting field, more particularly to a kind of air energy heat pump.
Background technology
Air energy heat pump is by compressor assembly operation, heat manufacture hot water in absorption air.Detailed process is：Pressure
Contracting machine compresses refrigerant, the elevated refrigerant of temperature after compression, and hot water, the refrigerant after heat exchange are manufactured by the condenser in water tank
Return to compressor and carry out subsequent cycle, in this course, atmospheric heat is absorbed by evaporator to be imported in refrigerant, and refrigerant is again
Import in water, produce hot water.
As long as air energy heat pump has air, temperature is more than zero degrees celsius, it is possible to 24 hours round-the-clock bearing operations.Together
When it can be inherently eliminated electric heater electric leakage, to produce the safety such as pernicious gas when dry combustion method and gas heater use hidden
Suffer from, overcome the shortcomings of solar water heater can not use and install inconvenience rainy days, have high safety, high energy-conservation, long lifespan,
Not the advantages that not discharging poison gas.
Authorization Notice No. is that CN205351767U utility model patent discloses a kind of air energy heat pump.The utility model
By setting three water tanks, and the first magnetic valve and second corresponding to temperature highest water tank is selected with temperature sensor
Magnetic valve is opened to avoid the too low situation of the coolant-temperature gage of output.But there is problems with the utility model：Due to only exporting
Water in temperature highest water tank, in the case where persistently entering cold water output hot water, water temperature highest water tank is becoming always
Change, cause magnetic valve frequent switching, be easily damaged.
The content of the invention
It is an object of the invention to provide a kind of air energy heat pump, it is advantageous that in the higher water tank of preferential output water temperature
Hot water and magnetic valve frequent switching will not be caused.
The present invention above-mentioned technical purpose technical scheme is that：A kind of air energy heat pump, including
Multiple water tanks and connected compressor and evaporator, the compressor are provided with connected heating tube, and the heating tube is passed through
Inside water tank, one end that the heating tube passes water tank is provided with restricting element, each water tank be provided with water inlet and
Delivery port, the water inlet and delivery port are respectively equipped with water intaking valve and outlet valve, and the inside of the water tank is provided with the storage of annular
Water cavity, two pieces are provided with the water storage cavity can move in a circle and the movable sealing closed with water storage cavity side along water storage cavity
Water storage cavity is separated to form two regions, is provided with the water storage cavity close to water outlet end warm by plate, two blocks of movable sealing plates
Sensor is spent, the heating tube penetrates in water tank and is located proximate to water outlet.
By using above-mentioned technical proposal, vaporization forms low temperature to liquid refrigerant after absorption air heat energy in evaporator
The steam of low pressure, compressor suction low-temp low-pressure steam after compression formed HTHP steam enter heating tube in, pass through
Heating tube heats to the water in multiple water tanks, while the high pressure high temperature vapor in heating tube is condensed into normal temperature high voltage liquid
Body, the liquid refrigerant of formation low-temp low-pressure, which is again introduced into evaporator, after throttling forms circulation constantly to multiple water storages
Water in tank is heated.When hot water is discharged, corresponding to temperature highest water tank that temperature sensor is detected
Water intaking valve and outlet valve are opened, and the water in hydrothermal area is emitted by delivery port, cold water is transported to from water inlet by cold water
Qu Zhong.Hydrothermal area constantly reduces during this, cold water area is continuously increased, and is covered in the installation site of temperature sensor by cold water area
Gai Shi, water intaking valve and outlet valve are closed.Because in this process into water storage cavity cold water will not directly and hot water contacts, and
During hot water is constantly discharged, the cumulative volume of water is reduced in hydrothermal area, and firing rate compares other water tanks faster, because
This temperature that the temperature sensor detects before the hot water of heated completion is completely exhausted out is highest all the time, water intaking valve
Also would not frequent switching with outlet valve.
The present invention is further arranged to：The water storage cavity is provided with embedded temperature sensor close to the inwall of water outlet
Mounting groove and the common heating tank for crossing heating tube.
By using above-mentioned technical proposal, temperature sensor and the heating tube being passed through in water storage cavity are separately positioned on installation
In groove and heating tank, it can thus avoid heating tube and temperature sensor from rotating movable sealing plate and cause to hinder.
The present invention is further arranged to：The mounting groove and heating tank pass through the water storage cavity center of circle, the work along its length
The thickness of dynamic sealing plate is more than the width of mounting groove and heating tank.
By using above-mentioned technical proposal, because mounting groove and heating tank pass through the water storage cavity center of circle and width along its length
Less than movable sealing plate thickness, therefore movable sealing plate can still reach close when by the position of mounting groove and heating tank
Envelope state.And movable sealing plate thickness it is thicker can also cause movable sealing plate move when it is more steady.
The present invention is further arranged to：The water inlet and delivery port are located at the same side of water storage cavity, the mounting groove and
Heating tank is respectively positioned on delivery port backwards to water inlet side.
By using above-mentioned technical proposal, heating tank and mounting groove are arranged on delivery port backwards to water inlet side so that
Just contacted when cold water area does not connect with delivery port with temperature sensor, close water intaking valve and outlet valve in time, avoided cold
Water discharges.
The present invention is further arranged to：The water tank is made up of nonmagnetic substance, and the movable sealing plate is by magnetic material
Material is made, and the outside of the water tank is provided with electromagnet, and the electromagnet is provided with band motor magnet centered on the water storage cavity center of circle
The dynamical element of circumferential movement.
By using above-mentioned technical proposal, the hot water in water storage cavity leads to after the first discharge and when reheating completion
Cross dynamical element band motor magnet to move, electromagnet absorption movable sealing plate simultaneously drives movable sealing plate to move together so that two
Block movable sealing plate moves to one piece between water inlet and delivery port again, and another piece positioned at water inlet backwards to delivery port
The original state of side.
The present invention is further arranged to：The dynamical element includes the point centered on the water storage cavity center of circle and rotates company with water tank
The rotating bar connect, the one end of the rotating bar away from pivot are provided with mounting blocks, and the water tank side is distinguished provided with both ends
The cylinder being rotatablely connected with water tank, mounting blocks, the electromagnet are located on mounting blocks.
By using above-mentioned technical proposal, with mounting blocks come fixed electromagnet, mounting blocks are limited around water storage by rotating bar
Chamber center of circle circular motion, the power of rotating bar rotation is provided by cylinder.
The present invention is further arranged to：The same side of the movable sealing plate is provided with plastics and abuts post.
By using above-mentioned technical proposal, pass through modeling when electromagnet adsorbs and drives one of movable sealing plate to rotate
Material abuts post and moved together to prop up another block of movable sealing plate so that cylinder single motion is with regard to that can make two blocks of movable sealing plates one
Step motion is in place.
The present invention is further arranged to：The rail groove of twice annular, the rail are respectively provided with the side wall of the water storage cavity both sides
Using same axis as the center of circle, the both sides of the movable sealing plate are respectively provided with the guiding in two insertion rail grooves for road groove and water storage cavity
Post.
By using above-mentioned technical proposal, the tracks of movable sealing plate are coordinated more by lead and rail groove
Add accurately, ensure that movable sealing plate is spaced all the time in the hot water during motion in two regions and cold water.
The present invention is further arranged to：The surface of the movable sealing plate and lead is equipped with rubber layer.
By using above-mentioned technical proposal, rubber layer is set cause movable sealing plate and water storage cavity side wall, lead and
All in sealing state between rail groove.
In summary, beneficial effects of the present invention are：
1st, water storage cavity is separated to form hydrothermal area and cold water area by two blocks of movable sealing plates, the hot water emission in hydrothermal area is complete
Outlet valve is closed afterwards, and then original cold water area is changed into hydrothermal area into the heated perimeter of heating tube；
2nd, temperature sensor and the heating tube being passed through in water storage cavity be separately positioned in mounting groove and heating tank avoid heating tube and
Temperature sensor rotates to movable sealing plate and causes to hinder.
Brief description of the drawings
Fig. 1 is the structural representation of embodiment；
Fig. 2 is the schematic cross-sectional view of water tank in embodiment；
Fig. 3 is the schematic cross-sectional view of movable sealing plate in embodiment；
Fig. 4 is the structural representation of water tank in embodiment.
Reference：1st, compressor；2nd, evaporator；3rd, heating tube；4th, water tank；5th, restricting element；6th, water inlet；7th, go out
The mouth of a river；8th, water intaking valve；9th, outlet valve；10th, water storage cavity；11st, mounting groove；12nd, heating tank；13rd, temperature sensor；14th, activity is close
Shrouding；15th, rail groove；16th, lead；17th, rubber layer；18th, rotating bar；19th, mounting blocks；20th, electromagnet；21st, cylinder；22、
Plastics abut post.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
This specific embodiment is only explanation of the invention, and it is not limitation of the present invention, people in the art
Member can make the modification of no creative contribution to the present embodiment as needed after this specification is read, but as long as at this
All protected in the right of invention by Patent Law.
As shown in figure 1, a kind of air energy heat pump, including connected compressor 1 and evaporator 2, the outlet of compressor 1 is connected with
Heating tube 3 is connected by connecting restricting element 5, restricting element 5 after multiple water tanks 4 with evaporator 2.
As shown in figure 1, vaporization forms the steaming of low-temp low-pressure to liquid refrigerant after absorption air heat energy in evaporator 2
Gas, compressor 1 suck low-temp low-pressure steam after compression formed HTHP steam enter heating tube 3 in, pass through heating tube 3
Water in multiple water tanks 4 is heated, while the high pressure high temperature vapor in heating tube 3 is condensed into normal temperature high voltage liquid, warp
Cross throttling after formed low-temp low-pressure liquid refrigerant be again introduced into evaporator 2 formed circulation constantly to multiple water tanks 4
In water heated.
As shown in Figures 2 and 3, the water inlet 6 of each water tank 4 and delivery port 7 are separately installed with water intaking valve 8 and outlet valve
9, water inlet and water outlet are controlled by water intaking valve 8 and outlet valve 9.The water storage cavity 10 of annular, water storage cavity 10 are formed in water tank 4
Close to both sides side wall of the delivery port 7 at the water inlet 6 respectively on be provided with mounting groove 11 and heating tank 12, installed in mounting groove 11
There is temperature sensor 13, pass through heating tube 3 in heating tank 12.Two annular rails are respectively formed on the both sides inwall of water storage cavity 10
Road groove 15, the diameter correspondent equal of rail groove 15 on rail groove 15 and the concentric of water storage cavity 10 and two side.Positioned at water storage cavity 10
The both sides of two blocks of interior movable sealing plates 14 form lead 16 and inserted in rail groove 15 so that movable sealing plate 14 is merely able to
Moved along the direction of rail groove 15, the surface of movable sealing plate 14 and lead 16 all forms one layer of rubber layer 17 and storage
The inwall of water cavity 10 abuts to form sealing.In order to avoid movable sealing plate 14 by mounting groove 11 and heating tank 12 when without
Method reaches sealing effectiveness, and mounting groove 11 and heating tank 12 are arranged to the state for passing through the center of circle of water storage cavity 10 on length direction, and close
The thickness of shrouding is more than the width of mounting groove 11 and heating tank 12.
As shown in Figures 2 and 3, the water inlet 6 of water tank 4 and delivery port 7 are adjacent, are opened in water intaking valve 8 and outlet valve 9
Before, position of one of movable sealing plate 14 between water inlet 6 and delivery port 7, another block of movable sealing plate 14 is located at
Water inlet 6 is backwards to the side of delivery port 7.After sensor feedback detection temperature, the He of water intaking valve 8 of water temperature highest water tank 4
Outlet valve 9 is opened, and the water filling of water intaking valve 8 will be far from water storage cavity 10 of the movable sealing plate 14 of delivery port 7 along annular and move, by
The water of heated mistake is discharged from delivery port 7.Because the cold water for entering water storage cavity 10 in this process directly will not connect with hot water
Touch, and during hot water is constantly discharged, the cumulative volume for the water that heating tube 3 is heated to is reduced, and firing rate compares other
Faster, therefore the temperature sensor 13 detects before the hot water of heated completion is completely exhausted out temperature begins water tank 4
It is highest eventually, water intaking valve 8 and outlet valve 9 also would not frequent switchings.
As shown in Figure 2 and Figure 4, the side of water tank 4 is rotatably connected to using the home position of water storage cavity 10 as rotating joint
Rotating bar 18, the one end of rotating bar 18 away from the center of water tank 4 is connected with mounting blocks 19, electromagnet is provided with mounting blocks 19
20.Cylinder 21 is also equipped with the outer wall of water tank 4, the both ends of cylinder 21 rotate with water tank 4 and mounting blocks 19 respectively to be connected
Connect.The water tank 4 is made up of nonmagnetic substance, and movable sealing plate 14 is made up of metal material, is connected with movable sealing plate 14
Plastics towards the side of water inlet 6 when between water inlet 6 and delivery port 7 abut post 22.
The course of work：When water intaking valve 8 and outlet valve 9 are opened, electromagnet 20 be just pointed to water inlet 6 and delivery port 7 it
Between movable sealing plate 14 and be in "on" position, at this time electromagnet 20 holds the movable sealing plate 14 so that water inlet 6
Only have another block of movable sealing plate 14 to move when water inlet.After delivery finishes, electromagnet 20 powers off cylinder
21 shrink the position for causing electromagnet 20 to be moved to another block of movable sealing plate 14.When temperature sensor 13 detects the storage again
When water in water pot 4 is temperature highest water, electromagnet 20 is powered and holds the movable sealing plate 14, and cylinder 21 stretches out and this is lived
The position that dynamic sealing plate 14 is moved between water inlet 6 and delivery port 7, and another block of movable sealing plate 14 abuts post 22 by plastics
Water inlet 6 is shifted onto backwards to the side of delivery port 7.
Claims (9)
1. a kind of air energy heat pump, including multiple water tanks (4) and connected compressor (1) and evaporator (2), the compression
Machine (1) is provided with connected heating tube (3), and the heating tube (3) is internal by water tank (4), and the heating tube (3) passes water storage
One end of tank (4) is provided with restricting element (5), and each water tank (4) is provided with water inlet (6) and delivery port (7), the water inlet
Mouth (6) and delivery port (7) are respectively equipped with water intaking valve (8) and outlet valve (9), it is characterized in that：The inside of the water tank (4) is provided with
The water storage cavity (10) of annular, two pieces are provided with the water storage cavity (10) can move in a circle and and water storage along water storage cavity (10)
Water storage cavity (10) is separated to form two by the closed movable sealing plate (14) in chamber (10) side, two pieces of movable sealing plates (14)
Region, temperature sensor (13) is provided with close to delivery port (7) end in the water storage cavity (10), the heating tube (3) penetrates water storage
Delivery port (7) place is located proximate in tank (4).
2. air energy heat pump according to claim 1, it is characterized in that：The water storage cavity (10) is close to delivery port (7) place
Inwall is provided with the mounting groove (11) of embedded temperature sensor (13) and the common heating tank (12) for crossing heating tube (3).
3. air energy heat pump according to claim 2, it is characterized in that：The mounting groove (11) and heating tank (12) are along length
Water storage cavity (10) center of circle is passed through in direction, and the thickness of the movable sealing plate (14) is more than the width of mounting groove (11) and heating tank (12)
Degree.
4. air energy heat pump according to claim 3, it is characterized in that：The water inlet (6) and delivery port (7) are located at water storage
The same side of chamber (10), the mounting groove (11) and heating tank (12) are respectively positioned on delivery port (7) backwards to water inlet (6) side.
5. air energy heat pump according to claim 4, it is characterized in that：The water tank (4) is made up of nonmagnetic substance, institute
State movable sealing plate (14) to be made up of magnetic material, the outside of the water tank (4) is provided with electromagnet (20), the electromagnet
(20) it is provided with the dynamical element with motor magnet (20) circumferential movement centered on water storage cavity (10) center of circle.
6. air energy heat pump according to claim 5, it is characterized in that：The dynamical element is included with water storage cavity (10) center of circle
Centered on point and the rotating bar (18) of water tank (4) rotation connection, the rotating bar (18) be provided with away from one end of pivot
Mounting blocks (19), water tank (4) side are provided with the cylinder that both ends are rotatablely connected with water tank (4), mounting blocks (19) respectively
(21), the electromagnet (20) is located on mounting blocks (19).
7. air energy heat pump according to claim 6, it is characterized in that：The same side of the movable sealing plate (14) is provided with modeling
Material abuts post (22).
8. air energy heat pump according to claim 7, it is characterized in that：Two are respectively provided with the side wall of water storage cavity (10) both sides
The rail groove (15) of road annular, the rail groove (15) and water storage cavity (10) are using same axis as the center of circle, the movable sealing plate
(14) both sides are respectively provided with the lead (16) in two insertion rail grooves (15).
9. air energy heat pump according to claim 8, it is characterized in that：The movable sealing plate (14) and lead (16)
Surface is equipped with rubber layer (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711139348.9A CN107883573B (en) | 2017-11-16 | 2017-11-16 | Air energy heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711139348.9A CN107883573B (en) | 2017-11-16 | 2017-11-16 | Air energy heat pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107883573A true CN107883573A (en) | 2018-04-06 |
| CN107883573B CN107883573B (en) | 2019-12-24 |
Family
ID=61777503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711139348.9A Active CN107883573B (en) | 2017-11-16 | 2017-11-16 | Air energy heat pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107883573B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GR1004877B (en) * | 2004-02-16 | 2005-05-06 | Παντελης Δημητριου Δονακης | System of moving thermally-insulated hot water separator for geysers and selector of the desired water quantity to be heated |
| CN1735776A (en) * | 2003-01-13 | 2006-02-15 | 开利公司 | Storage tank for hot water systems |
| CN1761841A (en) * | 2003-03-21 | 2006-04-19 | Bsh博施及西门子家用器具有限公司 | Water heater |
| WO2015022693A1 (en) * | 2013-08-15 | 2015-02-19 | Chromagen Agricultural Cooperative Society Ltd. | Expandable boiler |
| CN104848541A (en) * | 2015-05-25 | 2015-08-19 | 李新华 | Multi-liner air energy water heater |
| CN205351767U (en) * | 2016-02-02 | 2016-06-29 | 广东明鑫机电工程有限公司 | Air -source heat pump |
| CN205593159U (en) * | 2016-04-16 | 2016-09-21 | 上海连章热水器设备有限公司 | Novel circulation water heater |
-
2017
- 2017-11-16 CN CN201711139348.9A patent/CN107883573B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1735776A (en) * | 2003-01-13 | 2006-02-15 | 开利公司 | Storage tank for hot water systems |
| CN1761841A (en) * | 2003-03-21 | 2006-04-19 | Bsh博施及西门子家用器具有限公司 | Water heater |
| GR1004877B (en) * | 2004-02-16 | 2005-05-06 | Παντελης Δημητριου Δονακης | System of moving thermally-insulated hot water separator for geysers and selector of the desired water quantity to be heated |
| WO2015022693A1 (en) * | 2013-08-15 | 2015-02-19 | Chromagen Agricultural Cooperative Society Ltd. | Expandable boiler |
| CN104848541A (en) * | 2015-05-25 | 2015-08-19 | 李新华 | Multi-liner air energy water heater |
| CN205351767U (en) * | 2016-02-02 | 2016-06-29 | 广东明鑫机电工程有限公司 | Air -source heat pump |
| CN205593159U (en) * | 2016-04-16 | 2016-09-21 | 上海连章热水器设备有限公司 | Novel circulation water heater |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107883573B (en) | 2019-12-24 |
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