CN110030737A - A kind of triple valve and plate change formula burnt gas wall hanging furnace - Google Patents
A kind of triple valve and plate change formula burnt gas wall hanging furnace Download PDFInfo
- Publication number
- CN110030737A CN110030737A CN201910276023.8A CN201910276023A CN110030737A CN 110030737 A CN110030737 A CN 110030737A CN 201910276023 A CN201910276023 A CN 201910276023A CN 110030737 A CN110030737 A CN 110030737A
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- water
- bathing
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- passage
- heating
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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
- F24H9/14—Arrangements for connecting different sections, e.g. in water heaters
- F24H9/142—Connecting hydraulic components
- F24H9/144—Valve seats, piping and heat exchanger connections integrated into a one-piece hydraulic unit
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Devices For Medical Bathing And Washing (AREA)
Abstract
The present invention discloses a kind of triple valve, comprising: water inlet, the first water outlet, the second water outlet, shifting axle and stepper motor on the valve body is arranged in valve body, and the intake antrum being connected to the water inlet is equipped in the valve body；First water outlet and second water outlet pass through the first passage of coaxial arrangement respectively and second channel is connected to the intake antrum；The shifting axle is arranged on the axis of the first passage and second channel, the first water pond and the second water pond are fixed on the shifting axle, first water pond and second water pond are corresponding with the first passage and second channel respectively, and can seal the first passage and the second channel respectively with the mobile of the shifting axle.When first water pond seals the first passage, the second channel is opened, and when second water pond seals the second channel, the first passage is opened, to realize three kinds of single-pass, bilateral states.The present invention also provides a kind of plates to change formula burnt gas wall hanging furnace.
Description
Technical field
The present invention relates to fluid heater technical field more particularly to a kind of triple valve and the plate with the triple valve changes formula
Burnt gas wall hanging furnace.
Background technique
Currently, wall-hung boiler in the market is mostly dual-purpose wall-hung boiler, it can be used for bathing for heating.Now
On the market with household it is most be that plate changes heat exchange type wall-hung boiler, principle be the heating water outlet of wall-hung boiler install one it is electronic
Triple valve, one end flow to hot duct, and the other end is connect with plate switching heat-exchanger, for exchanging heat with bath water, to generate
Bath hot water.
But plate changes heat exchange type wall-hung boiler and has a problem that and is: cannot be worked at the same time for warm bathing, being typically designed is
Bathing is prior to heating, and when there is water-flow signal in bathing water outlet, heating end will stop heating.For having the wall of immediate thermal function
Hang furnace, i.e. the circulating line of 36 meters of heat needs 10 minutes time for the first time, for longer circulating line and lagging facility not
In the case where good, required duration can also be longer.It will stop heating during this, uncomfortable experience sense can be caused to user.Therefore
The approval in market must can be obtained by developing a burnt gas wall hanging furnace that can be carried out heating during bathing while also.
Summary of the invention
The purpose of the present invention is to provide the triple valves that two water outlets of one kind are able to achieve three kinds of single-pass, bilateral states.
The present invention also provides a kind of plates with above-mentioned triple valve to change formula burnt gas wall hanging furnace.
To achieve the above objectives, the present invention adopts the following technical scheme that.
A kind of triple valve, comprising: valve body, be arranged in water inlet on the valve body, the first water outlet, the second water outlet,
Shifting axle and stepper motor are equipped with the intake antrum being connected to the water inlet in the valve body；It is characterized in that, described first
Water outlet and second water outlet pass through the first passage of coaxial arrangement respectively and second channel is connected to the intake antrum；Institute
It states shifting axle to be arranged on the axis of the first passage and second channel, the first water pond and is fixed on the shifting axle
Two water ponds, first water pond and second water pond are corresponding with the first passage and second channel respectively, and with the shifting
The mobile of moving axis can seal the first passage and the second channel respectively；The stepper motor and the mobile axis connection,
For driving the shifting axle to be moved back and forth；When first water pond seals the first passage, the second channel
It opens, when second water pond seals the second channel, the first passage is opened.
As a further illustration of the above scheme, the first passage and the second channel are all funnel hole and each institute
Big opening one end of funnel hole is stated both facing to the intake antrum；The shape of first water pond and the big funnel of the first passage
Hole shape is consistent, and the shape of second water pond and the small funnel hole shape of the second channel are consistent；First water pond and
Spacing between the second water pond outermost be greater than the big funnel hole of the first passage and the second channel it is most short between
Away from and be less than the first passage and the second channel small funnel hole most short spacing.
As a further illustration of the above scheme, the stepper motor is arranged far from one end of the second channel,
The positioning device cooperated with the shifting axle is equipped in the second channel.The positioning device is preferably positioning ring, the shifting
One end of moving axis 5 is plugged in the positioning ring.
As a further illustration of the above scheme, being equipped with sealing ring on first water pond and second water pond.
As a further illustration of the above scheme, being additionally provided on first water outlet and/or the second water outlet corresponding
Connector.
A kind of plate changes formula burnt gas wall hanging furnace, comprising: shell, and setting in the intracorporal main heat exchanger of the shell, board-like change
Hot device is connected with hot duct on the main heat exchanger, and bathing pipeline is connected on the plate heat exchanger, in the confession
Heating coil road is equipped with three-way device, heating circulation pump, and a water outlet of the three-way device is heating port, another water outlet
End is bathing port, and the bathing port is connect by the minor loop that heats with the plate heat exchanger；It is characterized in that, described three
Exchange device is triple valve as described above, and the first water outlet of the triple valve serves as bathing port, the second of the triple valve
Water outlet serves as heating port.
As a further illustration of the above scheme, the bypass pipe for being shorted the hot duct is equipped in the shell,
By-passing valve is equipped on the bypass pipe；The by-passing valve is opened when heating loop blocking, realizes interior circulation.
As a further illustration of the above scheme, being connected with moisturizing between the bathing pipeline and the heating loop
Pipe is equipped with water compensating valve on the water supply pipe.
As a further illustration of the above scheme, the plate, which changes formula burnt gas wall hanging furnace, summer mode and two kinds of winter mode
Selection: in the case where summer does not need heating function and only requires bathing, being arranged to summer mode, and port of heating at this time is by second
Water pond is blocked completely, and the aperture of bathing port reaches maximum value；In the case where needing heating in winter, it is arranged to winter mould
Formula, the initial conditions bathing end cut-off of winter mode, the position by changing the shifting axle are realized while for warm bathings.
As a further illustration of the above scheme, changing the master control of formula burnt gas wall hanging furnace using plate before starting bathing function
Device processed judges whether to need to be transferred to peak load state, when peak load state cannot reach target temperature, increases bathing end
The aperture of mouth, so that the hot water after main heat exchanger heating more enters the plate heat exchanger；In winter for warm
In the case that bathing works at the same time, if when peak load, bathing port maximum opening are all unable to reach target temperature, cut-off
Heating port keeps bathing preferential.
The beneficial effects of the present invention are:
One, a kind of triple valve provided by the invention, be able to achieve the first water outlet and the second water outlet single-pass, three kinds of bilateral
State, and in single-pass, bilateral, the changeable water flow for flowing to two water outlets is particularly suited for use in plate and changes formula fuel wall hanging
On furnace.
Two, by the way that first passage, second channel to be arranged funnel, and configure the first water pond of respective shapes, second
Water pond, can regulating water flow size when proportioning valve use and play the role of turn-on deadline as triple valve.
Three, a kind of plate provided by the invention changes formula burnt gas wall hanging furnace, using above-mentioned specific triple valve, can make wall-hung boiler
It will not stop heating while bathing, improve comfort level；Formula wall-hung boiler is changed for the plate with immediate thermal function, can be efficiently modified by
In i.e. hot overlong time or the problem of excessively frequent switching triple valve is to user's bring discomfort.Meanwhile the present invention provides
A kind of plate change the ratio that formula burnt gas wall hanging furnace is also adjustable the water flow of course plate formula heat exchanger and hot duct, can improve
Due to user family's hydraulic pressure, the unstable bring bath water temperature overshot of air pressure or not hot problem；There can be effectively save energy consumption.
Detailed description of the invention
Fig. 1 show triple valve structural schematic diagram provided by the invention.
Fig. 2 show burnt gas wall hanging furnace structural schematic diagram provided by the invention.
Fig. 3 show triple valve partial structural diagram.
Fig. 4 show burnt gas wall hanging furnace operation control flow chart provided by the invention.
Description of symbols:
1: valve body, 2: water inlet, 3: the first water outlets, 4: the second water outlets, 5: shifting axle, 6: stepper motor, 7: water inlet
Chamber, 8: first passage, 9: second channel, 10: the first water ponds, 11: the second water ponds, 12: connector.
21: main heat exchanger, 22: plate heat exchanger, 23: hot duct, 24: bathing pipeline, 25: three-way device, 26: heating
Circulating pump, 27: heating minor loop, 28: shell, 29: bypass pipe, 210: by-passing valve, 211: water supply pipe, 212: water compensating valve.
Specific embodiment
In the description of the present invention, it should be noted that " transverse direction ", " vertical if any term " center " for the noun of locality
To ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top",
The indicating positions such as "bottom", "inner", "outside", " clockwise ", " counterclockwise " and positional relationship are orientation based on the figure or position
Relationship is set, the narration present invention is merely for convenience of and simplifies description, rather than the device or element of indication or suggestion meaning are necessary
It constructs and operates with specific orientation, with particular orientation, should not be understood as limiting specific protection scope of the invention.
In addition, being used for description purposes only if any term " first ", " second ", it is not understood to indicate or imply relatively heavy
The property wanted or the quantity for implicitly indicating technical characteristic." first " is defined as a result, " second " feature can be expressed or implicit include
One or more this feature, in the present description, " at least " are meant that one or more, unless otherwise clearly having
The restriction of body.
In the present invention, except as otherwise clear stipulaties and restriction, should make if any term " assembling ", " connected ", " connection " term
Broad sense goes to understand, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It is also possible to mechanical connect
It connects；It can be directly connected, be also possible to be connected by intermediary, can be and be connected inside two elements.For ability
For the those of ordinary skill of domain, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In invention, unless otherwise specified and limited, fisrt feature second feature "upper" or "lower" may include
First and second features directly contact, also may include fisrt feature and second feature be not direct contact but by them it
Between other characterisation contact.Moreover, fisrt feature second feature " on ", " under " and " above " include fisrt feature
Right above two features and oblique upper, or be only to indicate that first feature horizontal height is higher than the height of second feature.Fisrt feature
Second feature " on ", " under " and " below " include that fisrt feature is directly under or diagonally below the second feature, or only table
Show first feature horizontal height lower than second feature.
Below with reference to the attached drawing of specification, a specific embodiment of the invention is further described, is made of the invention
Technical solution and its benefits are clearer.It describes embodiment below with reference to attached drawing to be exemplary, it is intended to solve
The present invention is released, and is not considered as limiting the invention.
Embodiment one
As shown in Figure 1, a kind of triple valve, comprising: water inlet 2, the first water outlet on the valve body 1 is arranged in valve body 1
3, the second water outlet 4, shifting axle 5 and stepper motor 6 are equipped with the intake antrum 7 being connected to the water inlet 2 in the valve body 1,
First water outlet 3 and second water outlet 4 respectively by the first passage 8 of coaxial arrangement and second channel 9 with it is described
Intake antrum 7 is connected to；The shifting axle 5 is arranged on the axis of the first passage 8 and second channel 9, on the shifting axle 5
Be fixed with the first water pond 10 and the second water pond 11, first water pond 10 and second water pond 11 respectively with the first passage
8 and second channel 9 it is corresponding, and the first passage 8 and the second channel 9 can be sealed with the mobile of the shifting axle 5；It is described
Stepper motor 6 is connect with the shifting axle 5, for driving the shifting axle 5 to be moved back and forth.When 10 envelope of the first water pond
When first passage 8 is stated in residence, the second channel 9 is opened, described when second water pond 11 seals the second channel 9
First passage 8 is opened.In this way, the list of the first water outlet 3 and the second water outlet 4 may be implemented in the moving process of shifting axle 5
Logical, three kinds of states of bilateral.
In the present embodiment, the preferably described shifting axle 8 is copper axis.
Preferably, first water pond 10 and second water pond 11 are all located in the intake antrum 7；In other embodiment party
In formula, first water pond and second water pond are all located at outside the intake antrum, are equally able to achieve the first water outlet and second
Three kinds of single-pass of water outlet, bilateral states；It is not limited to the present embodiment.
It is further preferred that the first passage 8 and second channel 9 are all big opening one end of funnel hole and funnel hole
Both facing to intake antrum 7；The shape of first water pond 10 is consistent with the big funnel hole shape of the first passage 8, and described second
The shape of water pond 11 is consistent with the small funnel hole shape of the second channel 9；First water pond 10 and second water pond 11
Spacing between outside is greater than the most short spacing of the big funnel hole of the first passage 8 and the second channel 9 and is less than described
The most short spacing of the small funnel hole of first passage 8 and the second channel 9.In this way, in the moving process of the shifting axle 8,
Three kinds of single-pass, bilateral states of the first water outlet 3 and the second water outlet 4 not only may be implemented, but also can be under bilateral state
Adjust the water flow for flowing into the first water outlet 3 and the second water outlet 4 respectively.
Further, the stepper motor 6 is arranged far from one end of the second channel 9, in the second channel 9
It is interior equipped with the positioning device cooperated with the shifting axle 5.The positioning device is preferably positioning ring, one end of the shifting axle 5
It is plugged in the positioning ring.
To ensure sealing effect, sealing ring is additionally provided on first water pond 10 and second water pond 11.
For the installation convenient for triple valve, corresponding connection is additionally provided on first water outlet and/or the second water outlet
First 12.
A kind of triple valve provided in this embodiment, be able to achieve the first water outlet and the second water outlet single-pass, three kinds of bilateral
State, and in single-pass, bilateral, the changeable water flow for flowing to two water outlets is particularly suited for use in plate and changes formula fuel wall hanging
On furnace, with when plate changes on formula burnt gas wall hanging furnace, bath hot water amount not only can change, but also may be implemented to supply for warm simultaneously
Bath water.
Embodiment two
As shown in Fig. 2, a kind of plate changes formula burnt gas wall hanging furnace, comprising: shell 28, and the master being arranged in the shell 28
Heat exchanger 21, plate heat exchanger 22 are connected with hot duct 23 on the main heat exchanger 21, on the plate heat exchanger 22
It is connected with bathing pipeline 24, three-way device 25, heating circulation pump 26, the three-way device 25 are equipped on the hot duct 23
A water outlet be heating port, another water outlet is bathing port, by the heating minor loop 27 and plate-type heat-exchange
Device 22 connects；It is characterized in that, the three-way device 25 is the triple valve as described in embodiment one, the first of the triple valve goes out
Bathing port is served as at the mouth of a river, and the second water outlet of the triple valve serves as heating port.
A kind of plate provided in this embodiment changes formula burnt gas wall hanging furnace, there is summer mode and two kinds of winter mode selections.
As shown in connection with fig. 3, in the case where summer does not need heating function and only requires bathing function, it can be provided summer
Mode, the master controller of burnt gas wall hanging furnace rotate in the forward direction control stepper motor after receiving signal, and shifting axle will be radial to the right
It is mobile that until C, E point are overlapped, port of heating at this time is blocked completely by the second water pond, and the aperture of bathing port reaches maximum value,
Hot water after main heat exchanger heats can only flow to plate heat exchanger for heating the cold water in bathing pipe from bathing port.
When C point moves between E, D two o'clock, heating pipe is not turned on, and the aperture of bathing port will change, i.e., with
The movement of C point can adjust the water into bathing end to adjust bath water-temperature.
In the case where needing heating function in winter, it can be provided the initial conditions of winter mode, winter mode are exactly
Original state, A, B two o'clock are overlapped, the state of bathing end cut-off.Master controller has determined whether bathing signal or bathing signal
Power control the rotation step number of motor forward or backwards, shifting axle radial can move right to the left, i.e. bath water
Needed when water flow is big more hot water flow through plate heat exchanger and exchange heat, the step number that stepper motor will be made to rotate in the forward direction at this time
Increase, the lengthening distance that copper axis moves right, so that the hot water for flowing to plate heat exchanger increases；When bathing signal subtracts
Hour, stepper motor will reversely rotate, and shifting axle moves downward, and the hot water for flowing to plate heat exchanger will be reduced；When
After bathing blackout, motor and shifting axle can all be restored to initial position.
As shown in connection with fig. 4, to guarantee that burnt gas wall hanging furnace bath water can be heated rapidly to target temperature, master control before activation
Device processed can all judge whether to need to be transferred to peak load state, will will increase when peak load state cannot reach target temperature
The aperture at bathing end, so that the hot water after main heat exchanger heats more enters plate heat exchanger.In winter for warm bathing
It can work at the same time, in the case where working at the same time for warm bathing, bath water is all in peak load and in adjustable extent
When being unable to reach target temperature, keep bathing preferential cut-off heating.It can effectively improve user by above-mentioned control flow and use and relax
Adaptive.
To avoid failure, the step of the maximal regulated step number of stepper motor and bathing, heating while adjustable range when running
Number needs to be defined, and specifically, measures limit value by testing accordingly according to the difference of equipment.
Further, the bypass pipe 29 for being shorted the hot duct 23 is additionally provided in the shell 28, on the side
Siphunculus 29 is equipped with by-passing valve 210.By-passing valve 210 is opened when heating loop blocking, interior circulation is realized, prevents heating loop
Water temperature sharply increases.
Further, it is connected with water supply pipe 211 between the bathing pipeline and the heating loop, in the moisturizing
Pipe 211 is equipped with water compensating valve 212, in order to be heating loop moisturizing.
A kind of plate provided in this embodiment changes formula burnt gas wall hanging furnace, using specific triple valve, has both been adjustable course plate formula
The ratio of the water flow of heat exchanger and hot duct, and cut-off can be played the role of.In the case where summer not needing heating, heating
Port is ended, and bathing end aperture will be transferred to maximum, and the hot water at this moment heated through main heat exchanger will fully enter plate-type heat-exchange
Device is for heating bath water, moreover it is possible to the aperture of bathing port is adjusted according to the size of bath water, control enters board-like change
The water of hot device；In the case where needing heating in winter, bathing port will be ended safely when bathing is not used, through main heat exchanger
The hot water of heating will be completely used for heating, and when having bathing signal, judge the strong and weak of signal through master controller and then adjust to flow to two
The ratio for holding water flow, had both been able to satisfy the requirement of user's bathing in this way or had been able to satisfy demand of the user to heating, can significantly mention
Rise the comfort of user.
From the foregoing description of structures and principles it should be understood by those skilled in the art that, the present invention not office
It is limited to above-mentioned specific embodiment, this hair is all fallen within using the improvement of techniques well known and substitution on the basis of the present invention
Bright protection scope, protection scope of the present invention should limit it by each claim and its equivalent.In specific embodiment
The part not illustrated is the prior art or common knowledge.
Claims (10)
1. a kind of triple valve, comprising: valve body, the water inlet being arranged on the valve body, the second water outlet, move the first water outlet
Moving axis and stepper motor are equipped with the intake antrum being connected to the water inlet in the valve body；It is characterized in that, described first goes out
The mouth of a river and second water outlet pass through the first passage of coaxial arrangement respectively and second channel is connected to the intake antrum；It is described
Shifting axle is arranged on the axis of the first passage and second channel, and the first water pond and second are fixed on the shifting axle
Water pond, first water pond and second water pond are corresponding with the first passage and second channel respectively, and with the movement
The mobile of axis can seal the first passage and the second channel respectively；The stepper motor and the mobile axis connection are used
To drive the shifting axle to be moved back and forth；When first water pond seals the first passage, the second channel is opened
It opens, when second water pond seals the second channel, the first passage is opened.
2. a kind of triple valve according to claim 1, which is characterized in that the first passage and the second channel are all
Big opening one end of funnel hole and each funnel hole is both facing to the intake antrum；The shape of first water pond and described the
The big funnel hole shape in one channel is consistent, and the shape of second water pond and the small funnel hole shape of the second channel are consistent；
Spacing between first water pond and the second water pond outermost is greater than the big of the first passage and the second channel
The most short spacing of funnel hole and be less than the first passage and the second channel small funnel hole most short spacing.
3. a kind of triple valve according to claim 1, which is characterized in that the stepper motor is arranged far from described second
The one end in channel is equipped with the positioning device cooperated with the shifting axle in the second channel.The positioning device is preferably
One end of positioning ring, the shifting axle 5 is plugged in the positioning ring.
4. a kind of triple valve according to claim 3, which is characterized in that on first water pond and second water pond
Equipped with sealing ring.
5. a kind of triple valve according to claim 1, which is characterized in that be discharged in first water outlet and/or second
Corresponding connector is additionally provided on mouthful.
6. a kind of plate changes formula burnt gas wall hanging furnace, comprising: shell, and be arranged in the intracorporal main heat exchanger of the shell, plate-type heat-exchange
Device is connected with hot duct on the main heat exchanger, and bathing pipeline is connected on the plate heat exchanger, in the heating
Pipeline is equipped with three-way device, heating circulation pump, and a water outlet of the three-way device is heating port, another water outlet
For bathing port, the bathing port is connect by the minor loop that heats with the plate heat exchanger；It is characterized in that, the threeway
Device is the triple valve as described in any one of claim 1-5, and the first water outlet of the triple valve serves as bathing port,
Second water outlet of the triple valve serves as heating port.
7. a kind of plate according to claim 6 changes formula burnt gas wall hanging furnace, which is characterized in that be equipped in the shell by institute
The bypass pipe for stating hot duct short circuit is equipped with by-passing valve on the bypass pipe；The bypass is opened when heating loop blocking
Valve realizes interior circulation.
8. a kind of plate according to claim 6 changes formula burnt gas wall hanging furnace, which is characterized in that in the bathing pipeline and described
It is connected with water supply pipe between heating loop, water compensating valve is equipped on the water supply pipe.
9. a kind of plate according to claim 6 changes formula burnt gas wall hanging furnace, which is characterized in that the plate changes formula burnt gas wall hanging furnace
There are summer mode and two kinds of winter mode selections: in the case where summer does not need heating function and only requires bathing, being arranged to the summer
Season mode, port of heating at this time blocked completely by the second water pond, and the aperture of bathing port reaches maximum value；It needs to supply in winter
In the case where warm, it is arranged to winter mode, the initial conditions bathing end cut-off of winter mode, by the position for changing the shifting axle
Set realization while for warm bathing.
10. a kind of plate according to claim 6 changes formula burnt gas wall hanging furnace, which is characterized in that before starting bathing function, benefit
Judged whether to need to be transferred to peak load state with the master controller that plate changes formula burnt gas wall hanging furnace, when peak load state cannot reach
When to target temperature, increase the aperture of bathing port so that the hot water after main heat exchanger heating more enter it is described
Plate heat exchanger；In the case where being worked at the same time in winter for warm bathing, if peak load, bathing port maximum opening all
When being unable to reach target temperature, cut-off heating port keeps bathing preferential.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910276023.8A CN110030737A (en) | 2019-04-08 | 2019-04-08 | A kind of triple valve and plate change formula burnt gas wall hanging furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910276023.8A CN110030737A (en) | 2019-04-08 | 2019-04-08 | A kind of triple valve and plate change formula burnt gas wall hanging furnace |
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| CN110030737A true CN110030737A (en) | 2019-07-19 |
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| CN201910276023.8A Pending CN110030737A (en) | 2019-04-08 | 2019-04-08 | A kind of triple valve and plate change formula burnt gas wall hanging furnace |
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Application publication date: 20190719 |
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