CN110207392A - Method for correcting current function relationship between fan and proportional valve - Google Patents
Method for correcting current function relationship between fan and proportional valve Download PDFInfo
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- CN110207392A CN110207392A CN201811277542.8A CN201811277542A CN110207392A CN 110207392 A CN110207392 A CN 110207392A CN 201811277542 A CN201811277542 A CN 201811277542A CN 110207392 A CN110207392 A CN 110207392A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 75
- 238000002485 combustion reaction Methods 0.000 claims abstract description 28
- 238000002715 modification method Methods 0.000 claims description 15
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 240000002853 Nelumbo nucifera Species 0.000 claims description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims description 2
- 235000006510 Nelumbo pentapetala Nutrition 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 description 52
- 239000000567 combustion gas Substances 0.000 description 12
- 230000005611 electricity Effects 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 229960004424 carbon dioxide Drugs 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 239000002510 pyrogen Substances 0.000 description 1
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
- 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
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
Abstract
The invention discloses a method for correcting a current functional relation between a fan and a proportional valve, which comprises the steps of respectively determining the maximum combustion load Qmax and the minimum combustion load Qmin of a water heater under the current atmospheric pressure by combining the maximum current and the minimum current of the proportional valve in the water heater, and correcting a fan current and proportional valve current functional relation curve F (I) according to the maximum combustion load Qmax and the minimum combustion load Qmin. According to the method, the load of the water heater is calculated when the maximum output and the minimum output of the proportional valve are achieved under the current environment, the maximum output and the minimum output of the proportional valve are compared and replaced with the preset maximum output and the preset minimum output of the proportional valve, the corresponding relation between the output magnitude of the proportional valve control signal and the output load of the water heater is adjusted, and the fan current of the water heater is accurately adjusted according to the corresponding relation between the output load and the fan current.
Description
Technical field
The present invention relates to gas heater control fields, and in particular to a kind of blower and proportioning valve current function relationship
Modification method.
Background technique
Thermostatic water heaters combustibility is wherein each by multiple factors restriction (height above sea level, gas supply pressure, gas component)
The influence of a factor can all lead to the drift of water heater initial parameter.The actual load of the excessively high gas heater of height above sea level can be relatively low;
Gas supply hypotony, which will lead to air-fuel ratio discomfort combination burning, to be caused to stop working, and gas component deviation is excessive to will lead to water heater
Actual demand is not achieved in burning load and air-fuel specific force is improper caused flame-out.Inspection is passed through to this existing gas heater
It surveys the secondary pressure of gas nozzle and calculates corresponding load, but there are many influence for influencing gas water heater working efficiency, including
The air pressure of ambient atmosphere pressure gas supply and combustion gas quality etc. can be generated according to the adjusting of secondary voltage-controlled proportioning valve processed merely
Error influences the accurate control of comparative example valve and blower.
Summary of the invention
For overcome the deficiencies in the prior art, the purpose of the present invention be intended to provide it is a kind of can be in various influence factors
The lower accurate method for adjusting proportional valve control parameter of effect.
Method provided by the invention is as follows:
A kind of modification method of blower and proportioning valve current function relationship, this method include depressing and combining in current atmospheric
Proportioning valve maximum current and minimum current in water heater determine maximum combustion load Qmax and the minimum burning of water heater respectively
Load Qmin, according to the maximum combustion load Qmax and minimum burning load Qmin, to blower electric current and proportioning valve electric current letter
Number relation curve F (I) is modified.
Further, blower electric current and proportioning valve current function relation curve F (I) are modified, are specifically included:
In the state of determining that gas source and standard gas source differ greatly, according to the proportionate relationship of Qmax and default maximum combustion load Qmax0
Or the proportionate relationship j=Qmax/Qmax0 or j=Qmin/Qmin0 of Qmin and default maximum combustion load Qmin0 corrects ratio
The linear relationship of valve electric current and blower electric current is jF (I).
Further, correct proportioning valve electric current and blower electric current linear relationship be jF (I) after, this method comprises:
In the state that the secondary extruded of gas nozzle shows deviation, according to secondary pressure and the proportionate relationship i=P2/ between secondary pressure is preset
The linear relationship of Pmax0 or i=P21/Pmin0 amendment proportioning valve electric current and blower electric current is ijF (I).
Further, the judgment method that the secondary extruded of the gas nozzle shows the state of deviation specifically includes: according to combustion
The difference of the maximum gas pressure P1 and current atmospheric pressure P0 of gas jets determine current gas nozzle maximum secondary pressure, and according to combustion gas
The difference of the minimum air pressure P2 and current atmospheric pressure P0 of nozzle determine the secondary pressure of minimum of current gas nozzle, according to default heat
The secondary pressure of hydrophone load and the corresponding relationship of secondary pressure and current gas nozzle compares, and determines the secondary extruded of gas nozzle
Show deviation and deviation within a preset range.
Further, the judgment method that gas source and standard gas source differ greatly, specifically includes: according to Qmax and default heat
Difference between hydrophone maximum load Qmax0 or Qmin and default water heater minimum load Qmin0 is greater than preset value, determines gas
Source differs greatly with standard gas source.
Further, blower electric current and proportioning valve current function relation curve F (I) are modified, and are specifically included: according to
Maximum combustion load Qmax is corresponding with proportioning valve maximum current, and minimum burning load Qmin and proportioning valve minimum current
It is corresponding, determine the linear relationship of proportioning valve electric current and water heater load, and according to preset water heater load and blower electricity
Preset corresponding relationship is flowed, determines the corresponding relationship of proportioning valve electric current and blower electric current.
Further, this method further includes determining current gas pressure P1 relative to coefficient k=P1/ between standard pressure P0
P0 is less than preset value according to the difference between kQmax and default maximum combustion load Qmax0, and kQmin and default maximum combustion are negative
Difference between lotus Qmin0 is less than preset value, corresponding with proportioning valve maximum current according to kQmax, and kQmin and proportioning valve are most
Low current is corresponding.
Further, it is determined that the maximum combustion load Qmax of water heater and minimum burning load Qmin, specifically includes: root
According to the water and inflow temperature and leaving water temperature heated in preset time, load of the water heater under maximum power is determined
Load Qmin under Qmax and minimum power.
Further, it is determined that this method is also after the maximum combustion load Qmax of water heater and minimum burning load Qmin
Current gas pressure P1 is comprised determining that relative to coefficient k=P1/P0 between standard pressure P0, according to kQmax and default maximum combustion
The difference burnt between load Qmax0 is greater than preset value, determines that gas supply is abnormal.
Further, it is determined that this method is also after the maximum combustion load Qmax of water heater and minimum burning load Qmin
It comprises determining that under maximum output current and minimum output current, the output pressure Pmax and Pmin and current atmospheric of gas nozzle
The difference of pressure determines current gas pressure anomaly except the value range of the secondary pressure of gas nozzle.
Compared with prior art, the present invention is by calculating under current environment, when the maximum output and minimum of proportioning valve export
The load of water heater, and compare and replace with preset proportioning valve maximum output and minimum output, adjust Proportional Valve-controlled
The output size of signal processed and the corresponding relationship of water heater output loading, and closed according to output loading and the corresponding of blower electric current
System, the accurate blower electric current for adjusting water heater.
Detailed description of the invention
Fig. 1 is a kind of modification method flow chart of blower and proportioning valve current function relationship of the present invention.
Fig. 2 is the flow chart of the modification method makeover process of a kind of blower of the present invention and proportioning valve current function relationship.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments,
The present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used to explain this hair
It is bright, it is not intended to limit the present invention.
As shown in Figure 1, the embodiment of the invention provides a kind of control and regulation methods of proportioning valve, this method comprises: ratio
Valve is under the control of maximum current, and when being in maximum combustion gas output quantity, water heater is run under maximum power, determines most
High-power lower gas nozzle output end air pressure is maximum power lower water-heater operating air pressure Pmax, and according in preset time
The size and inflow temperature Lmax1 and leaving water temperature Lmax2 of water flow, determine gas heater in current environment maximum work
Load Qmax under rate.
Proportioning valve is under the control of minimum current, and when being in the smallest combustion gas output quantity, water heater is under minimum power
Operation determines that the air pressure of gas nozzle output end is minimum power lower water-heater operating air pressure Pmin under maximum power, and according to
The size of water flow and inflow temperature Lmin1 and leaving water temperature Lmin2, determine gas heater current in preset time
Load Qmin under environment minimum power.
Water heater determines blower electric current and proportioning valve electric current according to the corresponding relationship of preset load and blower electric current
Corresponding relationship.
Gas heater usually passes through the output quantity of the form control combustion gas of proportioning valve, and the flow of proportioning valve passes through electric current
Size is controlled, the corresponding relationship of predetermined current and proportioning valve opening-closing size in water heater, because under standard environment,
The opening-closing size of proportioning valve directly determine combustion gas generate load, and load caused by the size and combustion gas of electric current it
Between be linear relationship, so gas heater is stored with the linear relationship between electric current and preset value, held according to water heater needs
The size of the load adjustment proportioning valve of load, in actual use, because of the variation of height above sea level, supply gas pressure is too low to be led
Cause the different thermal efficiency for leading to combustion gas itself of quality of secondary pressure different in different time period and combustion gas itself
Difference, when being opened by current control proportioning valve to default size, gas nozzle can not provide suitable fuel gas, lead
The load of pyrogenicity hydrophone generates difference with preset value.
Exhaust fan is used to help the circulation of air, provides suitable air for burning, and exhaust gas is discharged, prevents one
The pernicious gases such as carbonoxide retain, and current control of the revolution of exhaust fan by load on blower, carry with water heater
Load be adapted, one provides suitable air inflow and capacity, and the electricity loaded on the load and proportioning valve of water heater carrying
Cleanliness is related, so the revolution of exhaust fan can determine that water heater is preset with exhaust fan by the electric current loaded on proportioning valve
Revolution s=F (I) wherein I is electric current of the load on proportioning valve, row is adjusted according to the proportionate relationship between Qmax and Qmax0
The revolution s of gas fan, so that s=jF (I).In this way, exhaust fan can work in the case where meeting the revolution to match with water heater.
Further, water heater determines that current gas pressure P1 is that sea-level atmosphere is pressed under p0 and maximum power, water heater work
Make under air pressure Pmax and minimum power, water heater working air pressure Pmin is in the upper and lower limits of the secondary pressure of proportioning valve.
Water heater makes according to the load adjustment preset value under the load and minimum power under maximum power under environment in the ban
Obtain Qmax0=Qmax and Qmin0=Qmin.
Water heater is according to the load under the load Qmax and current environment minimum power under current environment maximum power
Gap between Qmin and preset value is greater than first threshold, according to the load absolute presupposition value under current environment maximum power
Coefficient j=Qmax/Qmax0 or j=Qmin/Qmin0 adjust the corresponding relationship of preset blower electric current and proportioning valve electric current.
According to the operating air pressure Pmax and Pmin and air pressure P1 of current environment, determine water heater in the maximum electricity of shut-off valve
Secondary pressure Pmin1 of the secondary pressure Pmax1 and water heater flowed down under shut-off valve minimum current, and according to Pmax1 with
The difference of preset value Pmax0 is within 50 percent, and according to the difference of Pmin1 and preset value Pmin0 5 percent
Within ten, according to the proportionality coefficient of Pmax1 and Pmax0 or the proportionality coefficient of Pmin1 and Pmin0, i=Pmax1/Pmax0 or i
=Pmin1/Pmin0 adjusts the corresponding relationship of blower electric current and proportioning valve electric current, so as to adjust rotation speed of the fan and proportioning valve electric current
Corresponding relationship so that s=iF (I).
Water heater obtains current gas pressure in debugging mode first, determines that current gas pressure is sea-level atmosphere pressure,
Threshold value is preset in practical operation, when the pressure that pressure sensor detects is within preset threshold range, it is determined that current
Air pressure is sea-level atmosphere pressure, and later, water heater is run under maximum power, and pressure sensor detects the pressure of combustion gas nozzle
Power size is maximum power lower water-heater operating air pressure Pmax, and according to the water flow heated in preset time period, and
The temperature change of inlet and outlet determines the load Qmax of water heater;Similarly water heater determines minimum power lower water-heater
Operating air pressure Pmin and Qmin, and it is hidden not generate safety within the pressure limit that water heater is set by Pmax and Pmin
Suffer from, then adjusts the water heater upper loading limit in preset value and make Qmax0=Qmax and adjust the load of the water heater in preset value
Lower limit Qmin0=Qmin redefines the linear relationship between the electric current on proportioning valve and the load of water heater carrying.Reach
Accurately control the effect of combustible gas output quantity and effectively control hot water water temperature.
When the coefficient j of load absolute presupposition value under current environment maximum power is greater than preset value, illustrate that water heater is being worked as
Under preceding gaseous-pressure, the load of generation and default load are inconsistent, and water heater uses combustion gas and standard combustion gas the combustion heat it
It is upper that there is larger difference, it keeps original rotation speed of the fan that can cause the hidden danger of extinguishing of flame at this time, adjusts proportioning valve electric current and wind
Corresponding relationship between electromechanics stream, adjusting blower electric current according to coefficient j influences rotation speed of fan, matches with water heater load.
The secondary pressure that revolving speed of the exhaust fan in work and water heater generate is adapted, and too fast revolving speed may cause
Flame-out, under use environment, the revolving speed of exhaust fan is corresponding with electric current of the load on proportioning valve, corresponding with secondary pressure,
Load when the electric current on proportioning valve and the corresponding relationship between secondary pressure generate variation, water heater adjust exhaust fan revolving speed and
The preset value for loading the corresponding relationship between the electric current on proportioning valve, when load is in the electric current on proportioning valve and between secondary pressure
Corresponding relationship produce large change, then illustrate supply end gas supply produce exception, lead to pressure anomaly, need using
Person is handled.
It is as shown in Figure 2:
Step S100: the load of proportioning valve maximum output and minimum output under current environment is determined.
Step S200: the proportionate relationship k of current atmospheric pressure and standard atmospheric pressure is determined.
Step S300: the corresponding relationship of load and proportioning valve electric current is determined.
Step S400: the bound ratio j of water heater load and default load is determined.
Step S500: it determines the secondary pressure of gas nozzle and presets secondary pressure bound ratio i.
Step S600: the relationship between blower electric current and proportioning valve electric current is modified according to payload.
In another embodiment, water heater determines that current gas pressure is not equal to sea-level pressure, and determines current gas
Press coefficient k=P1/P0 relative to sea-level pressure, coefficient k and preset value according to current gas pressure relative to sea-level pressure
Load Qmax is compared under the product kQmax0 of load under maximum power and current environment maximum power, determine kQmax0 with
Difference between Qmax is less than preset value, then corrects preset value according to load Qmax under current environment maximum power, so that
Qmax0=Qmax.According to current gas pressure relative to the coefficient k of sea-level pressure and multiplying for the load under preset value minimum power
Product kQmin0 is compared with load Qmin under current environment maximum power, and it is default to determine that the difference between kQmin0 and Qmin is less than
Value then corrects preset value according to load Qmin under current environment maximum power, so that Qmin0=Qmin.
In another embodiment, the operating air pressure Pmax and Pmin under water heater maximum power is the two of proportioning valve
Except secondary pressure upper and lower limits, determine for unsaturated vapor.
In actual use, because design of pipe networks is lack of standardization and concentrated with gas and can generate the phenomenon of air pressure deficiency,
By judging under water heater maximum power with the operating air pressure under minimum power not in the upper and lower limits of proportioning valve, especially
It is less than the low pressure limit of proportioning valve, is determined currently for unsaturated vapor.Controller can be sent out in such a way that Feng Ming, display screen are shown etc.
Early warning requires user maintenance out.
In another embodiment, according to the operating air pressure Pmax and Pmin and air pressure P1 of current environment, heat is determined
Secondary pressure Pmax1 and water heater secondary pressure under shut-off valve minimum current of the hydrophone under shut-off valve maximum current
Pmin1, and it is greater than 50 percent or Pmin1's and preset value Pmin0 according to the difference of Pmax1 and preset value Pmax0
Difference is greater than 50 percent, determines gaseous-pressure exception.
In another embodiment, difference between kQmax0 and Qmax be greater than preset value or kQmin0 and Qmin it
Between difference be greater than preset value, determine that Qmax or Qmin are abnormal.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited to
This, anyone skilled in the art in the technical scope disclosed by the present invention, the variation that can readily occur in or replaces
It changes, should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection of claim
Subject to range.
Claims (10)
1. the modification method of a kind of blower and proportioning valve current function relationship, it is characterised in that: this method includes, in current atmospheric
Pressure combines proportioning valve maximum current and minimum current in water heater, determines the maximum combustion load Qmax and most of water heater respectively
Small burning load Qmin, according to the maximum combustion load Qmax and minimum burning load Qmin, to blower electric current and proportioning valve
Current function relation curve F (I) is modified.
2. the modification method of a kind of blower according to claim 1 and proportioning valve current function relationship, it is characterised in that: right
Blower electric current and proportioning valve current function relation curve F (I) are modified, and are specifically included: determining that gas source and standard gas source are poor
It is different it is larger in the state of, according to the proportionate relationship of Qmax and default maximum combustion load Qmax0 or Qmin and default maximum combustion
Load Qmin0 proportionate relationship j=Qmax/Qmax0 or j=Qmin/Qmin0 amendment proportioning valve electric current and blower electric current it is linear
Relationship is j F (I).
3. the modification method of a kind of blower according to claim 2 and proportioning valve current function relationship, it is characterised in that: repair
After the linear relationship of direct proportion valve electric current and blower electric current is j F (I), this method comprises: in the secondary extruded of gas nozzle
In the state of existing deviation, according to secondary pressure and the proportionate relationship i=P2/Pmax0 or i=P21/Pmin0 between secondary pressure are preset
The linear relationship for correcting proportioning valve electric current and blower electric current is ij F (I).
4. the modification method of a kind of blower according to claim 3 and proportioning valve current function relationship, it is characterised in that: institute
The judgment method for the state that the secondary extruded for stating gas nozzle shows deviation specifically includes: according to the maximum gas pressure P1 of gas nozzle with
The difference of current atmospheric pressure P0, determines current gas nozzle maximum secondary pressure, and according to the minimum air pressure P2 of gas nozzle with work as
The difference of preceding atmospheric pressure P0 determines the secondary pressure of minimum of current gas nozzle, according to pair of default water heater load and secondary pressure
It should be related to and be compared with the secondary pressure of current gas nozzle, determine that the secondary extruded of gas nozzle shows deviation and deviation in preset range
It is interior.
5. the modification method of a kind of blower according to claim 2 and proportioning valve current function relationship, it is characterised in that: gas
The judgment method that source and standard gas source differ greatly, specifically includes: according to Qmax and default water heater maximum load Qmax0 or
Difference between Qmin and default water heater minimum load Qmin0 is greater than preset value, determines that gas source differs greatly with standard gas source.
6. according to claim 1 to the modification method of a kind of blower described in 5 any one and proportioning valve current function relationship,
Be characterized in that: blower electric current and proportioning valve current function relation curve F (I) are modified, and are specifically included: negative according to maximum combustion
Lotus Qmax is corresponding with proportioning valve maximum current, and minimum burning load Qmin is corresponding with proportioning valve minimum current, determines
The linear relationship of proportioning valve electric current and water heater load, and it is preset corresponding with blower electric current according to preset water heater load
Relationship determines the corresponding relationship of proportioning valve electric current and blower electric current.
7. the modification method of a kind of blower according to claim 6 and proportioning valve current function relationship, it is characterised in that: should
Method further includes determining that current gas pressure P1 relative to coefficient k=P1/P0 between standard pressure P0, according to kQmax and is preset most
Difference between large-scale combustion load Qmax0 is less than preset value, and the difference between kQmin and default maximum combustion load Qmin0 is small
In preset value, corresponding with proportioning valve maximum current according to kQmax, kQmin is corresponding with proportioning valve minimum current.
8. according to claim 1 to the modification method of a kind of blower described in 5 any one and proportioning valve current function relationship,
It is characterized in that: determining the maximum combustion load Qmax and minimum burning load Qmin of water heater, specifically include: according to preset time
The water and inflow temperature and leaving water temperature of interior heating determine load Qmax and least work of the water heater under maximum power
Load Qmin under rate.
9. the modification method of a kind of blower according to claim 1 and proportioning valve current function relationship, it is characterised in that: really
After the maximum combustion load Qmax and minimum burning load Qmin that determine water heater, this method further include: determine current gas pressure P1
Relative to coefficient k=P1/P0 between standard pressure P0, according to the difference between kQmax and default maximum combustion load Qmax0
Greater than preset value, determine that gas supply is abnormal.
10. the modification method of a kind of blower according to claim 1 and proportioning valve current function relationship, it is characterised in that:
After the maximum combustion load Qmax and minimum burning load Qmin that determine water heater, this method further include: determine maximum output
Under electric current and minimum output current, the output pressure Pmax and Pmin of gas nozzle and the difference of current atmospheric pressure, in gas injection
Except the value range of the secondary pressure of mouth, current gas pressure anomaly is determined.
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CN110926032A (en) * | 2019-11-01 | 2020-03-27 | 华帝股份有限公司 | Fan air volume adjusting method for gas water heater and gas water heater |
CN111578525A (en) * | 2019-10-18 | 2020-08-25 | 华帝股份有限公司 | Calibration method of proportional valve of gas water heater |
CN111609560A (en) * | 2020-04-20 | 2020-09-01 | 芜湖美的厨卫电器制造有限公司 | Control method of gas water heater, gas water heater and computer readable storage medium |
CN111964269A (en) * | 2020-07-27 | 2020-11-20 | 广东万和新电气股份有限公司 | Gas water heater and automatic judgment and control method for rotating speed precision of fan of gas water heater |
CN113485466A (en) * | 2021-06-30 | 2021-10-08 | 深圳市科曼医疗设备有限公司 | Proportional valve control method and device, computer equipment and readable storage medium |
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