CN111121131A - Expansion tank capable of automatically inflating - Google Patents
Expansion tank capable of automatically inflating Download PDFInfo
- Publication number
- CN111121131A CN111121131A CN201811275583.3A CN201811275583A CN111121131A CN 111121131 A CN111121131 A CN 111121131A CN 201811275583 A CN201811275583 A CN 201811275583A CN 111121131 A CN111121131 A CN 111121131A
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- Prior art keywords
- sleeve
- box
- expansion tank
- water
- port
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 82
- 239000010985 leather Substances 0.000 claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 13
- 230000006978 adaptation Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 description 15
- 239000012528 membrane Substances 0.000 description 13
- 239000008236 heating water Substances 0.000 description 8
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000008399 tap water Substances 0.000 description 4
- 235000020679 tap water Nutrition 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1008—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system expansion tanks
Landscapes
- 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)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model provides a can automatic gas filled expansion tank, includes box (1), and this box (1) has a port, its characterized in that be equipped with involucra (2) with the port intercommunication in box (1), form air cavity (11) between this involucra (2) outer wall and box (1) inner wall, and involucra (2) inside water storage chamber (21) that forms, be equipped with the detection mechanism of involucra (2) height in box (1), this expansion tank still includes aerating device (5), and the one end of this aerating device (5) forms into water the end, and the other end forms the end of aerifing of being connected with aforementioned box (1), and this end of aerifing is equipped with aerifys check valve (57) with the junction of box (1), aerating device (5) can aerify to air cavity (11) under the state that the end of intaking has water pressure. The height of the leather diaphragm is detected, the box body is automatically inflated by combining water pressure with the inflation device, and the air inflation process is simple, energy-saving and reliable. Great convenience is brought to customers.
Description
Technical Field
The invention relates to a water tank, in particular to an expansion water tank applied to a dual-purpose furnace.
Background
In the prior art, an expansion water tank is installed in a waterway system and is mainly used for relieving the expansion and contraction amount of circulating water in a heating loop and a domestic water loop, and related documents can refer to a domestic gas heating and hot water dual-purpose stove (with an authorization publication number of CN2424413Y) with a patent number of 00214321.6; reference may also be made to the "floor water storage type heating/hot water gas dual-purpose stove" of the chinese utility model patent No. ZL200720056386.3 (the publication No. CN201104017 YY).
Due to the micro leakage of the air cavity in the expansion water tank, the air quantity in the expansion water tank is reduced after the expansion water tank is used for a period of time, and the pressure balance effect of the expansion water tank on a heating water pipeline is greatly reduced due to the reduction of the air quantity. So that insufficient air in the expansion tank often occurs. Now, when this happens, the user has to call a professional to go to the door to inflate the expansion tank. Bringing great inconvenience to the user. Meanwhile, because the air pressure in the expansion water tank is equal to the heating water pressure all the time, the phenomenon of insufficient air quantity in the expansion water tank is difficult to find, and therefore the heating pipeline is often operated in a dangerous state.
Disclosure of Invention
The invention aims to provide an expansion tank capable of automatically inflating aiming at the technical current situation.
The present invention provides an expansion tank that can automatically inflate by using water pressure, in view of the above technical situation.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a can automatic gas filled expansion tank, includes the box, and this box has a port, its characterized in that be equipped with the involucra with the port intercommunication in the box, form the air cavity between this involucra outer wall and the box inner wall, and the inside water storage chamber that forms of involucra, be equipped with the detection mechanism of involucra height in the box, this expansion tank still includes aerating device, and this aerating device's one end forms into water the end, and the other end forms the end of aerifing of being connected with aforementioned box, should aerify the end and be equipped with the check valve of aerifing with the junction of box, aerating device can aerify to the air cavity under the end of intaking has.
The inflator can comprise
One side of the first sleeve is provided with an opening to form the water inlet end;
the second sleeve is provided with an air inlet one-way valve, an air outlet end of the second sleeve is connected with the box body, and the caliber of the second sleeve is smaller than that of the first sleeve;
the large end of the conical sleeve is connected with the first sleeve, the small end of the conical sleeve is connected with the second sleeve, and the conical sleeve is provided with an air hole; and
the piston rod can locate in aforementioned first sleeve with axial displacement, and one end is equipped with the first piston that can with first sleeve inner chamber adaptation, and the other end is equipped with the second piston with second sleeve inner chamber adaptation, and aforementioned first piston corresponds the end setting of intaking and can turn into water pressure and drive the air in the second sleeve of power drive second piston compression second sleeve.
The water inlet end of the first sleeve is provided with a supporting seat which can be connected with a water pipe, and the inner end of the supporting seat extends out of the inner wall of the first sleeve. When the piston rod descends to the bottommost surface, the end face of the first piston cannot be attached to the inner wall surface of the first sleeve due to the existence of the supporting seat, and the effect area of water pressure is enough when the subsequent inflation is started.
The inner wall of the second sleeve is provided with a contact switch, and the second piston can touch the contact switch when moving to the extreme position.
The detection mechanism may comprise
The shell is hermetically connected with the port of the box body and is provided with a connecting port, and the outer wall of the shell is provided with a Hall element;
the wire wheel can be rotatably arranged in the shell;
the pull rope is arranged in the leather membrane, one end of the pull rope is connected with the top of the leather membrane, and the other end of the pull rope is connected with the wire wheel;
a spiral spring which is arranged in the shell and can provide a tension force to the wire wheel so as to keep the pull rope in a tension state all the time; and
and the magnet is arranged on the wire wheel and can be matched with the Hall element to transmit signals.
The sealing assembly structure of the shell and the box body is preferably arranged as follows: the shell connecting port is provided with a convex ring, the front end face and the outer end face of the convex ring are respectively provided with a first sealing ring and a second sealing ring, the other side face of the first sealing ring is in sealing contact with the port of the box body, and the convex ring and the second sealing ring are fixedly arranged on the port of the box body by a nut.
Preferably, both ends of the wire wheel are provided with a clockwork spring.
Compared with the prior art, the invention has the advantages that: the height of the leather diaphragm is detected, the box body is automatically inflated by combining water pressure with the inflation device, and the air inflation process is simple, energy-saving and reliable. Great convenience is brought to customers.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment.
Fig. 2 is a cross-sectional view of fig. 1.
FIG. 3 is a reference diagram of the usage status of the embodiment.
FIG. 4 is a control schematic block diagram of the embodiment in use.
FIG. 5 is a control flow diagram of an embodiment.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1 and 2, the expansion tank capable of automatically inflating in this embodiment includes a tank body 1 and an inflator 5, the tank body 1 has a port, a membrane 2 communicated with the port is provided in the tank body 1, an air cavity 11 is formed between an outer wall of the membrane 2 and an inner wall of the tank body 1, a water storage cavity 21 is formed inside the membrane 2, a detection mechanism 3 for the height of the membrane 2 is provided in the tank body 1, one end of the inflator 5 forms a water inlet end, the other end forms an inflation end connected with the tank body 1, an inflation check valve 57 is provided at a connection between the inflation end and the tank body 1, and the inflator 5 can inflate the air cavity 11 in a state that the water inlet end has water pressure.
The inflation device 5 comprises a first sleeve 51, a second sleeve 52, a conical sleeve 53 and a piston rod 54, wherein an opening on one side of the first sleeve 51 forms a water inlet end, the water inlet end of the first sleeve 51 is provided with a supporting seat 551 capable of being connected with a water pipe, and the inner end of the supporting seat 551 extends out of the inner wall of the first sleeve 51. The second sleeve 52 is provided with an air inlet one-way valve 58 and the air outlet end is connected with the box body 1, and the caliber of the second sleeve 52 is smaller than that of the first sleeve 51; the big end of the conical sleeve 53 is connected with the first sleeve 51, the small end is connected with the second sleeve 52, and the conical sleeve 53 is provided with an air hole 511; the piston rod 54 is axially movably arranged in the first sleeve 51, one end of the piston rod is provided with a first piston 55 which can be matched with the inner cavity of the first sleeve 51, the other end of the piston rod is provided with a second piston 56 which is matched with the inner cavity of the second sleeve 52, and the first piston 55 is arranged corresponding to the water inlet end and can convert water pressure into driving force to drive the second piston 56 to compress air in the second sleeve 52.
The inner wall of the second sleeve 52 is provided with a contact switch 59 (see fig. 4), which contact switch 59 can be touched when the second piston 56 moves to the extreme position.
The detection mechanism 3 comprises a shell 31, a reel 33, a pull rope 32, a clockwork spring 34 and a magnet 35, wherein the shell 31 is hermetically connected with a port of the box body 1 and is provided with a connecting port, and the outer wall of the shell 31 is provided with a Hall element 35; the reel 33 is rotatably arranged in the shell 31; the pull rope 32 is arranged in the leather membrane 2, one end of the pull rope is connected with the top of the leather membrane 2, and the other end of the pull rope is connected with the wire wheel 33; two spiral springs 34 which are respectively arranged at two ends of the reel and can give tension to the reel 33 so as to keep the pull rope 32 in a tension state all the time; the magnet 35 is arranged on the wire wheel 33 and can be matched with the Hall element 35 to transmit signals.
The assembly structure of the shell and the box body is as follows: the connecting port of the housing 31 has a convex ring 36, a first seal ring 42 and a second seal ring 43 are respectively arranged on the front end surface and the outer end surface of the convex ring 36, the other side surface of the first seal ring 42 is in sealing contact with the port of the box body 1, and the convex ring 36 and the second seal ring 43 are fixed on the port of the box body 1 by a nut 41.
Referring to fig. 3 and 4, in the heating pipeline used in this embodiment, a water pressure detecting element 63 is disposed on the heating pipeline 8, the heating pipeline 8 is connected to a connection port of the detecting mechanism 3, the water pipe 7 is connected to a water inlet end of the inflator 5, the water pipe 7 has a first branch pipe 71 and a second branch pipe 72 connected in parallel, a water inlet valve 61 is disposed on the first branch pipe 71, a water discharge valve 62 is disposed on the second branch pipe 72, and the controller 10 is connected to the water inlet valve 61, the water discharge valve 62, the hall element 36, the water pressure detecting element 63, and the contact switch 59.
The operation process comprises the following steps:
in the initial state of the expansion tank, the leather membrane is at the lowest position under the action of air pressure, and the controller records the point as the origin through the water pressure sensor. Heating pipeline water pressure increases afterwards, and heating water begins to get into expansion tank, and the involucra upwards expandes to it is rotatory to drive the line wheel through the cotton rope, and the controller passes through the rotatory number of times and the direction of rotation of magnet that the hall element detected. The current position of the diaphragm can be obtained, so that the heating water pressure which should be obtained under the condition that the air quantity of the expansion water tank is normal is obtained, and the comparison with the currently acquired heating water pressure can be carried out, so that whether the air content of the air cavity in the expansion water tank is low or not can be judged. If the pressure is lower than the preset value, the water inlet valve is opened to perform the inflation action, and the inflation can be stopped until the position of the leather membrane and the pressure of the heating water reach the matching standard.
The elastic force of the clockwork spring always enables the thread rope to be in a tensioning state, so that the thread wheel rotates and rolls under the action of the elastic force of the clockwork spring and the tension of the skin membrane along with the charging and the extrusion of the heating water. Because the periphery of the wire wheel is provided with a plurality of magnets, the shell is also provided with the Hall element, the wire wheel drives the magnets to rotate, the controller senses the rotating times and the rotating direction of the wire wheel through the Hall element, and finally the top end of the leather membrane is positioned at a certain height. And then, judging whether the air quantity in the current expansion water tank is normal or not according to a matching curve of the height of the leather membrane and the water pressure recorded in the controller. The pressure sensor of the heating loop is a necessary detecting device of the heating stove, so the controller can know the pressure of the heating water at any time.
And when the air quantity of the expansion water tank is judged to be insufficient, the water inlet valve is opened, tap water is introduced into the air charging device, and the water pressure of the tap water acts on the end face of the first piston. Thereby promote the piston rod upward movement, the terminal surface of the in-process second piston that moves up will extrude the air in the second sleeve, and when pressure in the second sleeve was greater than expansion tank current pressure, the air will be extruded into expansion tank's air cavity through the inflation check valve of expansion tank top inflation head department, and the gas in the first sleeve will escape from the gas pocket. When the piston rod rises to the top, the first piston is tightly attached to the sealing edge, so that water is prevented from flowing into the second sleeve, and the second piston touches the contact switch at the top of the small cavity. The controller receives the contact signal, then closes the water inlet valve, opens the drain valve, and the water in the first sleeve will be drained completely, and the piston rod descends to the lowest place, and the in-process that descends is through gas pocket external air supplement, and the second sleeve will be through admitting air check valve external air supplement. When the piston rod descends to the bottommost surface, the end face of the first piston cannot be attached to the inner wall surface of the first sleeve due to the existence of the supporting seat, and the effect area of water pressure is enough when the subsequent inflation is started. The air pressure in the expansion water tank can be filled to a standard range by reciprocating according to the actions above, and automatic inflation is realized.
Referring to fig. 5, the controller obtains the water pressure of the heating pipeline through the pressure detection element, and reads the initial height of the skin through the detection mechanism; judging whether the water pressure in the heating pipeline is lower than a set value lower limit or not under the current height of the leather diaphragm, if so, closing a drain valve by a controller, opening a water inlet valve, enabling tap water to enter a water pipe, and automatically inflating by an inflating device; after inflation, continuously judging whether the water pressure in the heating pipeline reaches the upper limit of a set value under the current height of the leather diaphragm, if so, closing the water inlet valve, opening the drain valve, and completing inflation; if not, the second piston touches the contact switch, the controller closes the water inlet valve, opens the water discharge valve for 30s, the piston rod returns to the lowest position, the controller closes the water discharge valve and opens the water inlet valve, the air charging device automatically charges air until the water pressure in the heating pipeline reaches the upper limit of the set value, and the air charging is finished.
The air quantity of the expansion water tank is judged by detecting the positions of the leather films inside the expansion water tank and the water pressure of the heating pipeline. The judgment is accurate, and reasonable judgment conditions are provided for the air supplement.
The automatic air supply of the expansion water tank is realized, and the power source of the automatic air supply is the water pressure of tap water. The air supply process is simple, energy-saving and reliable. Great convenience is brought to customers.
Claims (7)
1. The utility model provides a can automatic charging's expansion tank, includes box (1), and this box (1) has a port, its characterized in that be equipped with involucra (2) with the port intercommunication in box (1), form air cavity (11) between this involucra (2) outer wall and box (1) inner wall, and involucra (2) inside water storage chamber (21) that forms, be equipped with detection mechanism (3) of involucra (2) height in box (1), this expansion tank still includes aerating device (5), and the one end of this aerating device (5) forms into water the end, and the other end forms the end of aerifing of being connected with aforementioned box (1), and this end of aerifing is equipped with aerifys check valve (57) with the junction of box (1), aerating device (5) can aerify to air cavity (11) under the end of intaking has hydraulic state.
2. Self-inflating expansion tank according to claim 1, characterized in that the inflating device (5) comprises
A first sleeve (51) with one side open to form the water inlet end;
the second sleeve (52) is provided with an air inlet one-way valve (58) and an air outlet end is connected with the box body (1), and the caliber of the second sleeve (52) is smaller than that of the first sleeve (51);
a conical sleeve (53), wherein the large end is connected with the first sleeve (51), the small end is connected with the second sleeve (52), and the conical sleeve (53) is provided with an air hole (511); and
piston rod (54), can locate foretell first sleeve (51) axially movable, one end is equipped with first piston (55) that can with first sleeve (51) inner chamber adaptation, and the other end is equipped with second piston (56) with second sleeve (52) inner chamber adaptation, and foretell first piston (55) correspond the end setting of intaking and can turn into water pressure and drive the air in second piston (52) compression second sleeve (52).
3. The automatic inflatable expansion tank as claimed in claim 2, wherein the water inlet end of the first sleeve (51) is provided with a support base (551) capable of connecting with a water pipe, and the inner end of the support base (551) protrudes out of the inner wall of the first sleeve (51).
4. The self-inflating expansion tank as claimed in claim 2, characterized in that the inner wall of the second sleeve (52) is provided with a contact switch (59), the second piston (56) being able to touch the aforementioned contact switch (59) when moving to the extreme position.
5. Self-inflatable expansion tank as claimed in claim 1, characterized in that said detection means (3) comprise
A housing (31) hermetically connected to the port of the case (1) and having a connection port, wherein a hall element (35) is provided on the outer wall of the housing (31);
a reel (33) rotatably provided in the housing (31);
a pull rope (32) which is arranged in the leather film (2), one end of which is connected with the top of the leather film (2), and the other end of which is connected with the wire wheel (33);
a spring (34) which is provided in the case (31) and can apply a tension to the reel (33) to keep the cord (32) in a tensioned state at all times; and
and the magnet (35) is arranged on the wire wheel (33) and can be matched with the Hall element (35) to transmit signals.
6. The automatic inflatable expansion tank of claim 5, wherein the connecting port of the housing (31) is provided with a convex ring (36), the front end surface and the outer end surface of the convex ring (36) are respectively provided with a first sealing ring (42) and a second sealing ring (43), the other side surface of the first sealing ring (42) is in sealing contact with the port of the tank body (1), and a nut (41) fixes the convex ring (36) and the second sealing ring (43) on the port of the tank body (1).
7. The automatic inflatable expansion tank of claim 5, characterized in that both ends of the wire wheel (33) are provided with a spring (34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811275583.3A CN111121131B (en) | 2018-10-30 | 2018-10-30 | Expansion tank capable of automatically inflating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811275583.3A CN111121131B (en) | 2018-10-30 | 2018-10-30 | Expansion tank capable of automatically inflating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111121131A true CN111121131A (en) | 2020-05-08 |
| CN111121131B CN111121131B (en) | 2021-05-18 |
Family
ID=70484284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811275583.3A Active CN111121131B (en) | 2018-10-30 | 2018-10-30 | Expansion tank capable of automatically inflating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111121131B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1404495A (en) * | 1972-11-04 | 1975-08-28 | Bosch Gmbh Robert | Pressure accumulator |
| EP0016316A1 (en) * | 1979-03-19 | 1980-10-01 | Winkelmann & Pannhoff GmbH | Compressor-controlled expansion tank |
| CN86210945U (en) * | 1986-12-27 | 1987-10-31 | 肖超 | Automatic pressure regulator by means of expansion device for water heating system |
| EP0790411A1 (en) * | 1996-02-15 | 1997-08-20 | Amtrol Inc. | A corrosion resistant expansion tank |
| CN2521262Y (en) * | 2001-09-17 | 2002-11-20 | 西安兰环水处理技术有限责任公司 | Automatic adding air & supplying water apparatus for bag type expansion water tank |
| CN2833422Y (en) * | 2005-11-08 | 2006-11-01 | 无锡威勒电气设备有限公司 | Expansion water tank |
| CN201104017Y (en) * | 2007-08-30 | 2008-08-20 | 广东万和集团有限公司 | Standing water storage type warming/ water heating gas dual-purpose furnace |
| CN102943957A (en) * | 2012-10-25 | 2013-02-27 | 浙江大学宁波理工学院 | Tidal energy gas supply apparatus |
| CN103615588A (en) * | 2013-11-25 | 2014-03-05 | 罗彬� | Water consumption control device |
| CN105042070A (en) * | 2015-06-25 | 2015-11-11 | 张家港市顺佳隔热技术有限公司 | Rapidly-inflating type bag type expansion drum |
| CN205062894U (en) * | 2015-10-20 | 2016-03-02 | 北京凌锐能源技术有限公司 | Circulating water system softens moisturizing level pressure exhaust apparatus |
| CN207001383U (en) * | 2017-05-04 | 2018-02-13 | 武汉奥克化学有限公司 | Expansion drum for methyl allyl polyoxyethylene ether |
| CN207527849U (en) * | 2017-11-29 | 2018-06-22 | 河北中迪热能科技有限公司 | A kind of wall-hung boiler expansion tank |
-
2018
- 2018-10-30 CN CN201811275583.3A patent/CN111121131B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1404495A (en) * | 1972-11-04 | 1975-08-28 | Bosch Gmbh Robert | Pressure accumulator |
| EP0016316A1 (en) * | 1979-03-19 | 1980-10-01 | Winkelmann & Pannhoff GmbH | Compressor-controlled expansion tank |
| CN86210945U (en) * | 1986-12-27 | 1987-10-31 | 肖超 | Automatic pressure regulator by means of expansion device for water heating system |
| EP0790411A1 (en) * | 1996-02-15 | 1997-08-20 | Amtrol Inc. | A corrosion resistant expansion tank |
| CN2521262Y (en) * | 2001-09-17 | 2002-11-20 | 西安兰环水处理技术有限责任公司 | Automatic adding air & supplying water apparatus for bag type expansion water tank |
| CN2833422Y (en) * | 2005-11-08 | 2006-11-01 | 无锡威勒电气设备有限公司 | Expansion water tank |
| CN201104017Y (en) * | 2007-08-30 | 2008-08-20 | 广东万和集团有限公司 | Standing water storage type warming/ water heating gas dual-purpose furnace |
| CN102943957A (en) * | 2012-10-25 | 2013-02-27 | 浙江大学宁波理工学院 | Tidal energy gas supply apparatus |
| CN103615588A (en) * | 2013-11-25 | 2014-03-05 | 罗彬� | Water consumption control device |
| CN105042070A (en) * | 2015-06-25 | 2015-11-11 | 张家港市顺佳隔热技术有限公司 | Rapidly-inflating type bag type expansion drum |
| CN205062894U (en) * | 2015-10-20 | 2016-03-02 | 北京凌锐能源技术有限公司 | Circulating water system softens moisturizing level pressure exhaust apparatus |
| CN207001383U (en) * | 2017-05-04 | 2018-02-13 | 武汉奥克化学有限公司 | Expansion drum for methyl allyl polyoxyethylene ether |
| CN207527849U (en) * | 2017-11-29 | 2018-06-22 | 河北中迪热能科技有限公司 | A kind of wall-hung boiler expansion tank |
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| Publication number | Publication date |
|---|---|
| CN111121131B (en) | 2021-05-18 |
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