CN208765263U - A kind of air energy water heater unit - Google Patents
A kind of air energy water heater unit Download PDFInfo
- Publication number
- CN208765263U CN208765263U CN201821260450.4U CN201821260450U CN208765263U CN 208765263 U CN208765263 U CN 208765263U CN 201821260450 U CN201821260450 U CN 201821260450U CN 208765263 U CN208765263 U CN 208765263U
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- CN
- China
- Prior art keywords
- coil pipe
- water heater
- air energy
- evaporator
- heater unit
- 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.)
- Expired - Fee Related
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 239000003507 refrigerant Substances 0.000 claims abstract description 17
- 239000012530 fluid Substances 0.000 claims abstract description 8
- 238000005452 bending Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 238000010257 thawing Methods 0.000 description 46
- 239000002826 coolant Substances 0.000 description 9
- 238000001704 evaporation Methods 0.000 description 8
- 230000008020 evaporation Effects 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 206010037660 Pyrexia Diseases 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- VNFVKWMKVDOSKT-LREBCSMRSA-N (2r,3r)-2,3-dihydroxybutanedioic acid;piperazine Chemical compound C1CNCCN1.OC(=O)[C@H](O)[C@@H](O)C(O)=O VNFVKWMKVDOSKT-LREBCSMRSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
The utility model discloses a kind of air energy water heater units, comprising: heat pump system and water tank, the heat pump system include evaporator, gas-liquid filteration device, compressor, condenser, refrigerant fluid reservoir, kinetic pump, filter and throttle valve；The coil pipe that the evaporator includes shell, is set to the intracorporal fin of shell and is interspersed between the fin, the coil pipe include upper end coil pipe and lower end coil pipe, and the lower end coil pipe caliber is less than the upper end coil pipe caliber；The design of upper and lower side coil pipe different tube diameters reduces the pressure loss of the refrigerant in evaporator, reduces the operational load of compressor；The erroneous judgement of control system is prevented by the setting of the first temperature sensor, second temperature sensor, first pressure sensor and second pressure sensor；Adding wind generator system makes evaporator operation more efficient, and heat pump system working efficiency is stablized, energy conservation and environmental protection.
Description
Technical field
The utility model relates to technical field of heat pumps, more particularly, to a kind of air energy water heater unit.
Background technique
Air source heat pump generally uses hot gas defrosting method, and four-way Vavle switching when defrosting, heating mode switchs to refrigerating operaton, wing
Piece coil pipe becomes condenser, and hot water side heat exchanger becomes evaporator, and heat is absorbed from hot water by refrigeration cycle, along with pressure
Contracting machine wasted work finally enters finned coil from the high-temperature high-pressure gas refrigerant that compressor is discharged, and melts finned coil surface
Frost layer.It follows that not only unit does not heat normally to heat to hot water when defrosting, the heat of hot water will be consumed instead,
Lead to the reduction of hot water water temperature.
When outside air temperature or lower relative air humidity, finned coil frosting is slower, due to fin disk under micro- ice-lolly part
Pipe heat exchange property is still in higher state, and heating capacity and heat efficiency are not influenced by frost layer actually, still can normally be made
Heat, if entering defrosting mode at this time, although fin surface frost layer is relatively thin, since outside air temperature is lower, finned coil temperature
Rising still have a process, it is still necessary to consume the heat of hot water with after finned coil temperature rising after can just exit defrosting mode, show
It is so extremely uneconomical.
Utility model content
The utility model for overcome the deficiencies in the prior art, provides a kind of energy saving, highly effective defrosting air energy water heater
Unit.
To achieve the goals above, the utility model uses a kind of following technical scheme: air energy water heater unit, packet
Include: heat pump system and water tank, the heat pump system include evaporator, gas-liquid filteration device, compressor, condenser, refrigerant fluid reservoir,
Kinetic pump, filter and throttle valve；The evaporator includes shell, is set to the intracorporal fin of shell and is interspersed between the fin
Coil pipe, the coil pipe includes upper end coil pipe and lower end coil pipe, and the lower end coil pipe caliber is less than the upper end coil pipe caliber.
The utility model device realizes that the refrigerant in refrigerant fluid reservoir absorbs the heat in air by evaporator and vaporizes,
Without providing extra heat source, cost is lower, obtains higher temperature and pressure by compressor after refrigerant vaporization, the coil pipe pipeline
When middle lower end coil pipe caliber is less than the design of upper end coil pipe caliber so that coolant media is in coils gas by liquid evaporation, no
It can speed because of the increase of volume, coolant media flow velocity and lead to the excessive pressure loss, reduce the workload of compressor, add
The thermal efficiency is higher.
Further, the fin is wavy, and the waveform includes the first bending section and the second bending section；The design
So that fin obtains bigger heat transfer area, and two panels is Wavelike finned complements each other to form channel, so that air is evaporating
Residence time in device is longer, so that coil pipe and fin more effectively absorb the heat in air, it is higher to the utilization rate of the energy.
Further, first bending section is equipped with the heater being fixedly connected with first bending section；Setting hair
Hot body can provide more heats to the evaporator, accelerate the speed of evaporation, and the detour of coil pipe is arranged so that in the evaporation
More coil pipes are accommodated in device, are increased the time for absorbing heat to obtain more heats, are guaranteed effective evaporation；In fin knot
When white, fever body running defrosting guarantees the working efficiency of evaporator.
Further, the upper end coil pipe is connected with the lower end coil pipe by pipe fitting, the upper and lower end coil pipe with
The pipe fitting screw thread connection, the pipe fitting and upper and lower end coil pipe junction are equipped with sealing ring；Two disks are realized by pipe fitting
The connection of pipe, reduces the pressure loss that cold media gas is generated by upper end coil pipe, and the workload of compressor after reduction is saved
Energy consumption.
Further, the air energy thermal water dispenser group further includes wind power supply system, and the wind power supply system includes wind
Power generator, the distribution box being connected with the wind-driven generator and the battery in the distribution box；The wind-force supplies
Electric system is electrically connected with the heater, and electric power caused by wind-driven generator is supplied to the heater in evaporator, realization pair
The auxiliary heat supplying of evaporator, accelerates vaporization rate of the refrigerant in evaporator, and heat defrosting is provided when fin frosting, guarantees heat
The working efficiency of pumping system；Electric power can be stored in spare in battery in heat pump heat supply abundance, supplying heat source environmental protection does not produce
Raw surcharge.
Further, be additionally provided with economizer between the filter and the refrigerant fluid reservoir, the economizer with it is described
A gas-guide tube is equipped between compressor；The economizer makes refrigerant itself throttling and evaporation absorb heat to make another part system
Cryogen is subcooled, and when defrosting operation, in the insufficient situation of heat pump system heat supply, check valve is opened in control system control, is made
The compression pump pressurization will be delivered directly to by gas-guide tube by obtaining gaseous parts, guarantee the heating efficiency under defrosting operation.
Further, the control system includes temperature sensor, pressure sensor and central controller；The temperature passes
Sensor is electrically connected with central controller with pressure sensor；Pass through the temperature sensor, pressure sensor and center control
Full-automatic heating and intelligent defrosting operation are realized in electrical connection between device, there is measurement error in reduction, control system judge by accident into
The probability of row defrosting operation avoids the occurrence of " defrosting in advance " or " lag defrosting ", the phenomenon that even " defrosting not clean ", the control
System processed can avoid defrosting operation from excessively wasting according to practical defrosting time and Defrost operation time adjustment defrosting time interval
The energy.
Further, the temperature sensor includes the first temperature sensor at the coil pipe and is set to the shell
The second temperature sensor of external wall；Control system passes through the data to the first temperature sensor and second temperature sensor collection
The change rate and real time temperature of the decline of finned coil temperature are calculated, more acurrate judgement finned coil frosting situation prevents coil pipe temperature
Spend erroneous judgement caused by the sensing deviation or failure of sensor.
Further, the pressure sensor includes being set to the first pressure sensor of evaporator air side-entrance and being set to
The second pressure sensor of evaporator air side outlet；Control system is prevented by the pressure difference of the calculating evaporator import and export
The only erroneous judgement under erroneous judgement and certain abnormal operational conditions caused by the sensing deviation or failure of coil temperature sensor.
In conclusion the utility model has the advantage that the design of upper and lower side coil pipe different tube diameters reduces refrigerant and exists
The pressure loss in evaporator reduces the operational load of compressor；Pass through the first temperature sensor, second temperature sensor,
The setting of one pressure sensor and second pressure sensor prevents the erroneous judgement of control system；Wind generator system is added to evaporate
Device working efficiency is higher, and heat pump system working efficiency is stablized, energy conservation and environmental protection.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of utility model.
Fig. 2 is the evaporator cross-sectional view of utility model.
Fig. 3 is the structural schematic diagram of coil pipe in utility model.
Fig. 4 is the structural schematic diagram of fin in utility model.
Fig. 5 is enlarged drawing at A in Fig. 2.
Specific embodiment
In order to make those skilled in the art better understand the utility model, below in conjunction with the utility model reality
The attached drawing in example is applied, the technical solutions in the embodiments of the present invention are clearly and completely described.
As shown in Figs. 1-5, a kind of air energy water heater unit, comprising: heat pump system, wind generator system, control system
And water tank 4；The heat pump system includes that the evaporator 1 for connecing forming circuit, gas-liquid filteration device 15, compression are sequentially connected by pipeline
Machine 2, condenser 13, refrigerant fluid reservoir 6, economizer 19, filter 7, throttle valve 14 and with the 13 lower section pipeline phase of condenser
Water pump 18 even；Wherein evaporator 1 includes that shell 11, the fin 12 being set in shell 11 and detour are interspersed in the fin 12
Between coil pipe 13, the set-up mode of fin 12 keeps its wavy, so that fin 12 possesses bigger heat transfer area, and adjacent
Two panels Wavelike finned 12 complements each other to form airflow channel, so that residence time of the air in evaporator 1 is longer, so that disk
Pipe 13 and fin 12 more effectively absorb the heat in air, higher to the utilization rate of the energy；Wavelike finned 12 include first
Bending section 121 and the second bending section 122, the first bending section 121 are equipped with cylindrical heater 123, and heater 123 is
Commercially available PTC fever tablet is simultaneously connect with 121 pin of the first bending section, and coil pipe 13 is made of metallic copper, and copper has
Good thermal conductivity and corrosion resistance, fin 12 are made of metallic aluminium, and aluminium not only possesses good thermal conductivity, and aluminium can
Plasticity is good, so that the thermal efficiency that coolant media absorbs in air in evaporator 1 is higher.
Specifically, coil pipe 13 divides for upper end coil pipe 14 and lower end coil pipe 15.Coil pipe 15 caliber in lower end is less than the upper end plate
14 caliber of pipe, different caliber settings avoid coolant media in evaporator 1 from becoming gas from liquid after absorbing the heat in air
State, volume increase cause flow velocity to increase and generate the excessive pressure loss, and the setting is so that 2 operating power source of compressor consumes
Reduce；Upper end coil pipe 14 is connected to lower end coil pipe 15 by pipe fitting 131, and one is additionally provided in the pipe fitting 131 in the slow of broadening formation
Room is rushed, which is greater than 14 caliber of upper end coil pipe, when coolant media enters in pipe fitting 131 from lower end coil pipe 15,
Due to the Wall-Thickness Difference of upper end coil pipe 14 and surge chamber, obstruction portion 133, cold media are formed in surge chamber and 14 connecting place of upper end coil pipe
By vortex is formed after a reverse impact power when matter strikes the obstruction portion 133, lead to coolant media reduced velocity flow, it is corresponding single
The fluid of position volume overcomes energy consumed by flow resistance to reduce, and reduces the coolant media pressure loss；Upper and lower coil pipe port point
The port threads connection of pipe fitting 131 is not corresponded to, and is equipped with sealing rubber ring 132 in port junction, and seal rubber is set
Circle 132 had not only prevented the leakage of coolant media, but also can guarantee that pressure is stablized in pipe fitting 131.
Wind power supply system includes wind-driven generator 21, the distribution box 22 being connected with the wind-driven generator 21 and is set to
Battery 23 in the distribution box 22；The evaporator 1 is matched with the wind generator system, is specifically evaporator 1
In heater 123 be electrically connected with distribution box 22, control system includes temperature sensor, pressure sensor and central controller；
The temperature sensor is electrically connected with central controller with pressure sensor, and the first temperature sensor 311 is equipped at coil pipe 13,
Second temperature sensor 312 is equipped at 11 outer wall of shell；The pressure sensor includes set on the of 1 air side-entrance of evaporator
One pressure sensor 321 and second pressure sensor 322 set on 1 air side outlet of evaporator；In weather cold, in air
Heat it is few, will lead to evaporator 1 supply shortage of heat；Solenoid valve 51 is opened, and the electric power that wind-driven generator 21 generates passes through
Circuitron 54 is transported to the heater 123 in evaporator 1, and heater 123 is powered on fever and inhales for coolant media in coil pipe 13
Heat, to guarantee heat pump system heating efficiency；When 12 surface frosting of fin, 123 heat supply of heater defrosting guarantees heat pump system
Normal work；When heat pump system heat is in liberal supply, solenoid valve 51 is closed, the power Transmission that wind-driven generator 21 generates
It is stored in into battery 23；When battery 23 is filled with electricity, feedback information opens solenoid valve 51, to evaporation to control system
The auxiliary heating of device 1.
The gas-guide tube 55 that the economizer 19 is equipped with check valve 52 by one is connected with compressor 2, and economizer 19 makes
Refrigerant itself throttling and evaporation absorbs heat to make another part refrigerant be subcooled, and when defrosting operation, heat pump system is supplied
In the insufficient situation of heat, control system opens check valve 52, so that gaseous parts will be delivered directly to the compression by pipeline
Machine 2 pressurizes, and guarantees the heating efficiency under defrosting operation.Central controller is PLC, and PLC is by calculating 13 temperature change of coil pipe
Rate, can more acurrate judgement fin 12,13 working condition of coil pipe, prevent the sensing deviation or failure of temperature sensor at coil pipe 13
Caused erroneous judgement；The pressure difference of air side inlet and outlet is calculated, one prevents the sensing deviation or failure of temperature sensor at coil pipe 13
Caused erroneous judgement, so that the judgement of control system is more accurate, prevents secondly preventing the erroneous judgement under certain abnormal operational conditions
Unnecessary energy consumption generates, and central processing unit can carry out the adjustment at defrosting time interval according to the practical defrosting time monitored,
Unnecessary defrosting operation is avoided, energy consumption is saved.
Specifically, the PLC is commercially available Mitsubishi FX1N, the temperature sensor and the pressure sensor
It is commercially available component.Control system concrete operating principle are as follows: at the coil pipe 13 that the first temperature sensor 311 monitors
Temperature T1, the evaporator 1 that monitors of the outdoor temperature T2 that monitors of second temperature sensor 312, first pressure sensor 321
The 1 air side outlet pressure P2 of evaporator that air side inlet pressure P1 and second pressure sensor 322 monitor is anti-by signal
Feed PLC；PLC analytical calculation is carried out to obtained data and compared with setting value after carry out judgement processing.If specifically: room
When the temperature difference Δ T1 of external environment temperature and 13 temperature of coil pipe is less than setting value Δ T0, every 13 temperature of detection cycle (Δ C) coil pipe
Decline change rate whether is greater than V1 DEG C of preset change rate/Δ C or whether 13 temperature drop-out value of certain time inner coil pipe has been greater than T0；
If the temperature difference of outdoor environment temperature and 13 temperature of coil pipe is more than or equal to setting value Δ T0, every detection cycle (Δ C) coil pipe 13
Whether greatly whether temperature decline change rate be greater than V2 DEG C of preset change rate/Δ C or 13 temperature drop-out value of certain time inner coil pipe
In T3；If outdoor environment temperature T2 has reached defrosting interval time t0 lower than runing time t1 after pre-seting temperature T4 and defrosting,
Then enter defrosting mode；If outdoor environment temperature T2 is had reached lower than runing time t1 after pre-seting temperature T4 and defrosting between defrosting
Every time t0, but it is unsatisfactory for above-mentioned condition, then further checks 13 air side inlet outlet pressure differential Δ P0 of coil pipe；If 13 temperature of coil pipe
When lower than set temperature T4,13 air side inlet outlet pressure differential of coil pipe is greater than the set value Δ P1, then enters defrosting mode；When defrosting
Between t1 reach defrosting time t0 or 13 air side inlet outlet pressure differential Δ P0 of coil pipe less than pressure difference Δ P2 or 13 temperature T1 of coil pipe and be
The no set temperature T5 that is greater than then exits defrosting mode.When terminating defrosting, PLC obtains the practical defrosting time of this defrosting
T2, and compared with setting value t0, when the practical defrosting time t2 of this defrosting is shorter, increases defrosting interval time t0, make
For one of the entry condition of defrosting next time；As the practical defrosting time t2 longer of this defrosting, defrosting interval time t0 is reduced,
One of entry condition as defrosting next time；When the practical defrosting time t2 of this defrosting is suitable for that then next time defrosts interval time
T0 is remained unchanged.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.
Claims (9)
1. a kind of air energy water heater unit, comprising: heat pump system and control system, the heat pump system include for absorbing sky
The evaporator (1) of heat, refrigerant fluid reservoir (6), compressor (2) and filter (7) for the refrigerant that pressurizes in gas；Its feature exists
In: between the evaporator (1) includes shell (11), the fin (12) being set in shell (11) and is interspersed in the fin (12)
Coil pipe (13);The coil pipe (13) includes upper end coil pipe (14) and lower end coil pipe (15), and lower end coil pipe (15) caliber is small
In upper end coil pipe (14) caliber.
2. air energy water heater unit according to claim 1, it is characterised in that: the fin (12) is wavy, institute
Stating waveform includes the first bending section (121) and the second bending section (122).
3. air energy water heater unit according to claim 2, it is characterised in that: set on first bending section (121)
There is the heater (123) being fixedly connected with first bending section (121).
4. air energy water heater unit according to claim 1, it is characterised in that: the upper end coil pipe (14) and it is described under
End plate pipe (15) is connected by pipe fitting (131), and the upper and lower end coil pipe is threadedly coupled with the pipe fitting (131)；The pipe
Part (131) and upper and lower end coil pipe junction are equipped with sealing ring (132).
5. air energy water heater unit according to claim 1, it is characterised in that: the air energy thermal water dispenser group further includes
Wind power supply system, the wind power supply system include wind-driven generator (21), are connected with the wind-driven generator (21)
Distribution box (22) and the battery being set in the distribution box (22).
6. air energy water heater unit according to claim 1, it is characterised in that: the filter (7) and the refrigerant
It is additionally provided between fluid reservoir (6) economizer (19), a gas-guide tube is equipped between the economizer (19) and the compressor (2)
(55).
7. air energy water heater unit according to claim 1, it is characterised in that: the control system includes temperature sensing
Device, pressure sensor and central controller；The temperature sensor is electrically connected with central controller with pressure sensor.
8. air energy water heater unit according to claim 7, it is characterised in that: the temperature sensor includes being set to institute
It states the first temperature sensor (311) at coil pipe (13) and is set to the second temperature sensor (312) of the shell (11) outer wall.
9. air energy water heater unit according to claim 7, it is characterised in that: the pressure sensor includes being set to steam
The first pressure sensor (321) for sending out device (1) air side-entrance and the second pressure for being set to evaporator (1) air side outlet sense
Device (322).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821260450.4U CN208765263U (en) | 2018-08-07 | 2018-08-07 | A kind of air energy water heater unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821260450.4U CN208765263U (en) | 2018-08-07 | 2018-08-07 | A kind of air energy water heater unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208765263U true CN208765263U (en) | 2019-04-19 |
Family
ID=66130472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821260450.4U Expired - Fee Related CN208765263U (en) | 2018-08-07 | 2018-08-07 | A kind of air energy water heater unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208765263U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111750569A (en) * | 2020-07-04 | 2020-10-09 | 河北华航新能源开发集团有限公司 | Air source heat pump system |
| CN113669857A (en) * | 2020-05-13 | 2021-11-19 | 广东美的制冷设备有限公司 | Air conditioner sterilization method, air conditioner and storage medium |
| CN114777337A (en) * | 2022-04-27 | 2022-07-22 | 广东万和新电气股份有限公司 | Gas water heater and control method thereof |
-
2018
- 2018-08-07 CN CN201821260450.4U patent/CN208765263U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113669857A (en) * | 2020-05-13 | 2021-11-19 | 广东美的制冷设备有限公司 | Air conditioner sterilization method, air conditioner and storage medium |
| CN111750569A (en) * | 2020-07-04 | 2020-10-09 | 河北华航新能源开发集团有限公司 | Air source heat pump system |
| CN111750569B (en) * | 2020-07-04 | 2022-01-28 | 河北华航新能源开发集团有限公司 | Air source heat pump system |
| CN114777337A (en) * | 2022-04-27 | 2022-07-22 | 广东万和新电气股份有限公司 | Gas water heater and control method thereof |
| CN114777337B (en) * | 2022-04-27 | 2024-04-12 | 广东万和新电气股份有限公司 | Gas water heater and control method thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190419 |
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| CF01 | Termination of patent right due to non-payment of annual fee |