CN214501745U - Secondary heat exchanger for condensing boiler - Google Patents
Secondary heat exchanger for condensing boiler Download PDFInfo
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- CN214501745U CN214501745U CN202120245096.3U CN202120245096U CN214501745U CN 214501745 U CN214501745 U CN 214501745U CN 202120245096 U CN202120245096 U CN 202120245096U CN 214501745 U CN214501745 U CN 214501745U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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Abstract
The utility model particularly relates to a secondary heat exchanger for condensing boiler belongs to condensing boiler technical field, and the problem that solve provides one kind and conveniently carries out abluent secondary heat exchanger for condensing boiler to secondary heat exchanger's inner chamber and the laying dust on the heat exchange tube, and the scheme of adoption is: the outer shell is sleeved outside the inner shell, a smoke inlet pipe, a water adding pipe, a cooling water outlet pipe, a liquid level observation pipe, a smoke exhaust pipe, a cooling water inlet pipe, a water exhaust pipe and a smoke inlet, a water adding port, a cooling water inlet, a liquid level pipe communication port, a smoke exhaust port, a cooling water outlet and a water outlet of the inner shell are communicated in a one-to-one correspondence mode through hoses, a plurality of vibrating motors are arranged on the outer wall of the inner shell, and a plurality of balls are connected to the lower portion of the inner shell in a rolling mode; the utility model discloses the effectual heat exchange efficiency who guarantees secondary heat exchanger.
Description
Technical Field
The utility model belongs to the technical field of the condensation boiler, concretely relates to secondary heat exchanger for condensation boiler.
Background
The secondary heat exchanger for the condensing boiler recovers sensible heat in the combusted flue gas and condensation latent heat of water vapor, condenses the flue gas, fully recycles energy and greatly improves the heat efficiency of the boiler. Inside through setting up a plurality of horizontally baffles of current secondary heat exchanger, separate into a plurality of return strokes with secondary heat exchanger' S inner chamber, a plurality of return strokes are the intercommunication in proper order and are formed the flue of S-shaped, increase the length of flue, and the heat exchange tube is vertical runs through the baffle setting in each return stroke of flue, increases the contact time of flue gas and heat exchange tube for the heat transfer is more abundant. However, because the heat exchange tubes penetrate through the partition plate and are distributed in each return stroke of the flue, the traditional cleaning water tube is difficult to clean the heat exchange tubes in the return stroke of the flue, so that dust is accumulated on the outer surfaces of the heat exchange tubes, and the heat exchange efficiency is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes prior art exists not enough, provides a secondary heat exchanger for condensing boiler, washs secondary heat exchanger's inner chamber and heat exchange tube, avoids heat exchange tube surface deposition, the effectual heat exchange efficiency who guarantees secondary heat exchanger.
In order to solve the technical problem, the utility model discloses a technical scheme be: a secondary heat exchanger for a condensing boiler, comprising:
the heat exchanger comprises a heat exchanger body and a heat exchanger body, wherein the heat exchanger body comprises an outer shell and an inner shell, and the outer shell is sleeved outside the inner shell;
the shell body is provided with: the smoke inlet pipe is arranged on one side of the upper part of the outer shell, the liquid level observation pipe is arranged on the other side of the upper part of the outer shell, the water adding pipe and the cooling water delivery pipe are arranged on the upper part of the outer shell, the smoke exhaust pipe is arranged on one side of the lower part of the outer shell, the cooling water inlet pipe and the water exhaust pipe are arranged on the lower part of the outer shell, and the smoke inlet pipe, the water adding pipe, the cooling water delivery pipe, the liquid level observation pipe, the smoke exhaust pipe, the cooling water inlet pipe and the water exhaust pipe all penetrate through the outer shell and extend to the inside of the outer shell;
the inner shell is provided with a pipeline corresponding to the outer shell: the smoke inlet, the water inlet, the cooling water inlet, the liquid level pipe communicating port, the smoke outlet, the cooling water guiding outlet and the water outlet, wherein the smoke inlet pipe, the water feeding pipe, the cooling water guiding pipe, the liquid level observation pipe, the smoke exhaust pipe, the cooling water inlet pipe and the water outlet are communicated with the smoke inlet, the water inlet, the liquid level pipe communicating port, the smoke exhaust port, the cooling water guiding outlet and the water outlet through hoses in a one-to-one correspondence manner, namely the smoke inlet pipe is communicated with the smoke inlet through a hose, the smoke inlet pipe provides smoke to be condensed in the inner shell cavity through the smoke inlet, the water feeding pipe is communicated with the water inlet through a hose, the water feeding pipe provides cleaning dust accumulation water for the inner shell through the water inlet, the cooling water guiding pipe is communicated with the cooling water inlet through a hose, the cooling water guiding pipe provides cooling water for heat exchange for the inner shell through the cooling water inlet, the liquid level observation pipe is communicated with the liquid level pipe communication port through a hose, the liquid level observation pipe is used for observing the addition amount of cleaning water for the inner shell, the smoke exhaust pipe is communicated with the smoke exhaust port through a hose, smoke subjected to secondary cooling enters the smoke exhaust pipe through the smoke exhaust port and is then exhausted to the outside of the heat exchanger body, the cooling water inlet pipe is communicated with the cooling water outlet through a hose, cooling water subjected to heat exchange enters the cooling water inlet pipe through the cooling water outlet and then provides hot water to the outside, the drain pipe is communicated with the drain port through a hose, and the cleaned water enters the drain pipe through the drain port and is then exhausted to the outside of the heat exchanger body;
the lower part of the inner shell is symmetrically provided with a plurality of pairs of supporting columns, the lower ends of the supporting columns are all in rolling clamping connection with balls, a plurality of pairs of limiting grooves are fixed on the outer shell in one-to-one correspondence with the balls, the balls can roll in the corresponding limiting grooves, the outer wall of the inner shell is provided with a plurality of vibrating motors, the bodies of the vibrating motors are fixed with the outer shell, and the accumulated dust cleaning effect is improved through the vibration effect of the vibrating motors; the inside of interior casing is provided with: the heat exchange tube runs through the partition plate is fixed in the inner shell, the upper end of the heat exchange tube is communicated with the cooling water inlet, and the lower end of the heat exchange tube is communicated with the cooling water outlet.
The hoses are all stainless steel hoses. The inner shell is in when the outer shell is internally vibrated, the cleaning of the inner part of the outer shell and the heat exchange tube is convenient, and the connection stability of each pipeline is ensured.
The separator includes a plurality of: the left end of the left baffle plate is fixed with the inner wall of the inner shell, the right end of the left baffle plate is a flue gas channel, the left baffle plate is arranged by inclining from left to right, the right end of the right baffle plate is fixed with the inner wall of the inner shell, the left end of the right baffle plate is a flue gas channel, the right baffle plate is arranged by inclining from right to left, and the left baffle plate and the right baffle plate are alternately arranged at intervals. The baffle that the slope set up can accelerate the speed of washout when the washing water flows, further improves the inside abluent effect of interior casing.
And an opening and closing button for controlling the opening and closing of the vibration motor is arranged on the outer shell. The device can be assembled in a skid-mounted condensing boiler, and is convenient and independent to clean and maintain the secondary heat exchanger.
And a sealing valve for sealing the liquid level observation pipe is arranged at the upper end of the liquid level observation pipe. When the secondary heat exchanger is used, the sealing valve is closed to prevent the liquid level observation tube from leaking smoke, and when the secondary heat exchanger is cleaned, the sealing valve is opened to observe the addition amount of cleaning water through the liquid level in the liquid level observation tube.
The vibration motors are two in number and are symmetrically arranged on two sides of the inner shell.
The support column adopts two pairs, two pairs the support column symmetry set up in the both sides of interior casing.
And valves are arranged on the smoke inlet pipe, the water adding pipe, the cooling water delivery pipe, the smoke exhaust pipe, the cooling water inlet pipe and the water discharge pipe.
Compared with the prior art, the utility model following beneficial effect has.
The utility model discloses a set up interconnect and can be at relative motion's in the certain limit shell body and interior casing again, including the inside heat recovery system that sets up the flue gas of casing, set up the vibrating motor of drive interior casing vibration between shell body and interior casing, through pack the laying dust in the washing water washing heat recovery system including in the casing, the cleaning performance is good, avoids heat exchange tube surface laying dust, the effectual heat exchange efficiency who guarantees secondary heat exchanger.
Two, the utility model discloses including the lower extreme of casing be provided with matched with gyro wheel and spacing groove, the gyro wheel rolls at the spacing inslot, because the motion that the inertia of interior casing itself arouses and vibrating motor's vibration, washing water and the striking of interior shell inner wall and heat transfer outer wall accelerate, what accumulated dust drops with higher speed and dissolves, further reinforcing cleaning performance.
Thirdly, the utility model discloses simple structure, this device can be assembled in the condensing boiler of sled dress, and convenient solitary washs and maintains convenient to use to secondary heat exchanger.
Drawings
The present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a front view of the secondary heat exchanger for a condensing boiler of the present invention.
Fig. 2 is the internal structure schematic diagram of the secondary heat exchanger for the condensing boiler of the present invention.
Fig. 3 is the schematic diagram of the internal structure of the secondary heat exchanger for the condensing boiler of the present invention.
In the figure: the heat exchanger comprises a heat exchanger body 1, a smoke inlet pipe 2, a water feeding pipe 3, a cooling water delivery pipe 4, a sealing valve 5, a liquid level observation pipe 6, an on-off button 7, a smoke exhaust pipe 8, a cooling water inlet pipe 9, a water discharge pipe 10, an outer shell 11, an inner shell 12, a vibration motor 13, a support column 14, a ball 15, a limiting groove 16, a smoke inlet 17, a water feeding port 18, a cooling water inlet 19, a liquid level pipe communicating port 20, a smoke exhaust port 21, a cooling water delivery port 22, a water discharge port 23, a heat exchange pipe 24, a left partition plate 25 and a right partition plate 26.
Detailed Description
The following is a further description with reference to specific examples.
A secondary heat exchanger for a condensing boiler, comprising:
the heat exchanger comprises a heat exchanger body 1, wherein the heat exchanger body 1 comprises an outer shell 11 and an inner shell 12, and the outer shell 11 is sleeved outside the inner shell 12;
the outer shell 11 is provided with: the smoke inlet pipe 2, the water feeding pipe 3, the cooling water outlet pipe 4, the liquid level observation pipe 6, the smoke exhaust pipe 8, the cooling water inlet pipe 9 and the water exhaust pipe 10 are arranged, the smoke inlet pipe 2 is arranged on one side of the upper portion of the outer shell 11, the liquid level observation pipe 6 is arranged on the other side of the upper portion of the outer shell 11, the water feeding pipe 3 and the cooling water outlet pipe 4 are arranged on the upper portion of the outer shell 11, the smoke exhaust pipe 8 is arranged on one side of the lower portion of the outer shell 11, the cooling water inlet pipe 9 and the water exhaust pipe 10 are arranged on the lower portion of the outer shell 11, and the smoke inlet pipe 2, the water feeding pipe 3, the cooling water outlet pipe 4, the liquid level observation pipe 6, the smoke exhaust pipe 8, the cooling water inlet pipe 9 and the water exhaust pipe 10 all penetrate through the outer shell 11 and extend to the inside of the outer shell 11;
the inner shell 12 is provided with: a smoke inlet 17, a water filling port 18, a cooling water inlet 19, a liquid level pipe communicating port 20, a smoke outlet 21, a cooling water leading-out port 22 and a water draining port 23, wherein the smoke inlet pipe 2, the water filling pipe 3, the cooling water leading-out pipe 4, the liquid level observation pipe 6, the smoke exhaust pipe 8, the cooling water inlet pipe 9, the water draining pipe 10 are communicated with the smoke inlet 17, the water filling port 18, the cooling water inlet 19, the liquid level pipe communicating port 20, the smoke outlet 21, the cooling water leading-out port 22 and the water draining port 23 in a one-to-one correspondence manner through hoses, namely, the smoke inlet pipe 2 is communicated with the smoke inlet 17 through a hose, the smoke inlet pipe 2 provides smoke to be condensed into the cavity of the inner shell 12 through the smoke inlet 17, the water filling pipe 3 is communicated with the water filling port 18, the water filling pipe 3 provides water for cleaning accumulated dust to the inner shell 12 through the water filling port 18, the cooling water leading-out pipe 4 is communicated with the cooling water inlet 19 through a hose, the cooling water delivery pipe 4 is connected with the inner shell 12 through the cooling water inlet 19 and provides cooling water for heat exchange, the liquid level observation pipe 6 is connected with the liquid level pipe connecting port 20 through a hose, the liquid level observation pipe 6 is used for observing the addition amount of cleaning water for the inner shell 12, the smoke exhaust pipe 8 is connected with the smoke exhaust port 21 through a hose, smoke subjected to secondary cooling enters the smoke exhaust pipe 8 through the smoke exhaust port 21 and is discharged to the outside of the heat exchanger body 1, the cooling water inlet pipe 9 is connected with the cooling water delivery port 22 through a hose, cooling water subjected to heat exchange enters the cooling water inlet pipe 9 through the cooling water delivery port 22 and then provides hot water to the outside, the drain pipe 10 is connected with the drain port 23 through a hose, and water subjected to cleaning enters the drain pipe 10 through the drain port 23, then discharged to the outside of the heat exchanger body 1;
a plurality of pairs of supporting columns 14 are symmetrically arranged at the lower part of the inner shell 12, balls 15 are clamped at the lower ends of the supporting columns 14 in a rolling manner, a plurality of pairs of limiting grooves 16 are fixed on the outer shell 11 in a one-to-one correspondence manner with the balls 15, the balls 15 can roll in the corresponding limiting grooves 16, a plurality of vibration motors 13 are arranged on the outer wall of the inner shell 12, the bodies of the vibration motors 13 are fixed with the outer shell 11, and the accumulated dust cleaning effect is improved through the vibration effect of the vibration motors 13; the inside of the inner housing 12 is provided with: baffle and heat exchange tube 24, the baffle is a plurality of, and is a plurality of the baffle is used for with S type' S flue is separated into to the inner chamber of interior casing 12, and is a plurality of heat exchange tube 24 runs through the baffle is fixed in inside the interior casing 12, the upper end of heat exchange tube 24 with cooling water inlet 19 intercommunication, the lower extreme of heat exchange tube 24 with cooling water outlet 22 intercommunication is led.
The hoses are all stainless steel hoses. When the inner shell 12 vibrates in the outer shell 11, the cleaning of the inside of the outer shell 11 and the heat exchange tube 24 is facilitated, and the connection stability of each pipeline is also ensured.
The separator includes a plurality of: left baffle 25 and right baffle 26, the left end of left side baffle 25 with the inner wall of interior casing 12 is fixed mutually, the right-hand member of left side baffle 25 is flue gas channel, left side baffle 25 is by left right side slope setting, the right-hand member of right side baffle 26 with the inner wall of interior casing 12 is fixed mutually, the left end of right side baffle 26 is flue gas channel, right side baffle 26 is by right left side slope setting, left side baffle 25 and the interval of right side baffle 26 set up in turn. The inclined partition plate can accelerate the flushing speed of the flowing cleaning water, and further improve the cleaning effect of the interior of the inner shell 12.
And an on-off button 7 for controlling the on-off of the vibration motor 13 is mounted on the outer shell 11. The device can be assembled in a skid-mounted condensing boiler, and is convenient and independent to clean and maintain the secondary heat exchanger.
And a sealing valve 5 for sealing the liquid level observation pipe 6 is arranged at the upper end of the liquid level observation pipe 6. When the secondary heat exchanger is used, the sealing valve 5 is closed to prevent the liquid level observation tube 6 from leaking smoke, and when the secondary heat exchanger is cleaned, the sealing valve 5 is opened to observe the addition amount of cleaning water through the liquid level in the liquid level observation tube 6.
The number of the vibration motors 13 is two, and the two vibration motors 13 are symmetrically arranged on two sides of the inner shell 12.
Two pairs of the supporting columns 14 are adopted, and the two pairs of the supporting columns 14 are symmetrically arranged on two sides of the inner shell 12.
And valves are arranged on the smoke inlet pipe 2, the water adding pipe 3, the cooling water outlet pipe 4, the smoke exhaust pipe 8, the cooling water inlet pipe 9 and the water discharge pipe 10.
The using method comprises the following steps:
1. when the secondary heat exchanger is used in normal times, the valves on the water adding pipe 3, the water discharging pipe 10 and the sealing valve 5 of the liquid level observation pipe 6 are closed, the valves on the smoke inlet pipe 2, the cooling water leading-out pipe 4, the smoke discharging pipe 8 and the cooling water inlet pipe 9 are opened, smoke forms a smoke flowing channel through the smoke inlet pipe 2, the inner shell 12 and the smoke discharging pipe 8, cooling water forms a heat exchange water channel through the cooling water leading-out pipe 4, the heat exchange pipe 24 and the cooling water inlet pipe 9, and the cooling water recovers the heat of the smoke;
2. when the secondary heat exchanger needs to be cleaned, the valves on the smoke inlet pipe 2, the cooling water outlet pipe 4, the smoke outlet pipe 8 and the cooling water inlet pipe 9 are closed, the valve on the water inlet pipe 3 and the sealing valve 5 of the liquid level observation pipe 6 are opened, cleaning water is input into the inner shell 12, the addition amount of the cleaning water is observed through the liquid level observation pipe 6, when the height of the water in the liquid level observation pipe 6 is higher than that of the inner shell 12, the cleaning water is full, then the valve on the water inlet pipe 3 is closed, and the motor of the vibration motor 13 is started, so that the vibration motor 13 vibrates at high speed in the outer shell 11 for 1-3 minutes, and dust accumulated on the inner wall of the inner shell 12 and the outer wall of the heat exchange pipe 24 are fully dissolved in the cleaning water;
3. opening a valve on the drain pipe 10, discharging the cleaned water to the outside of the heat exchanger body 1, and repeating the operation for 2 to 3 times to thoroughly clean the accumulated dust;
4. after cleaning, the valve on the water discharge pipe 10 and the sealing valve 5 on the liquid level observation pipe 6 are closed, and the valves on the smoke inlet pipe 2, the cooling water delivery pipe 4, the smoke exhaust pipe 8 and the cooling water inlet pipe 9 are opened for heat exchange.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. It will be apparent to those skilled in the art that modifications and improvements can be made to the above-described embodiments without departing from the spirit and scope of the invention. Accordingly, it will be appreciated that those skilled in the art, upon attaining an understanding of the foregoing may readily produce alterations to, variations of, and equivalents to these embodiments without departing from the spirit and scope of the present invention as defined by the appended claims.
Claims (8)
1. A secondary heat exchanger for a condensing boiler, comprising:
the heat exchanger comprises a heat exchanger body (1), wherein the heat exchanger body (1) comprises an outer shell (11) and an inner shell (12), and the outer shell (11) is sleeved outside the inner shell (12);
the outer shell (11) is provided with: a smoke inlet pipe (2), a water adding pipe (3), a cooling water outlet pipe (4), a liquid level observation pipe (6), a smoke exhaust pipe (8), a cooling water inlet pipe (9) and a water discharge pipe (10), the smoke inlet pipe (2) is arranged on one side of the upper part of the outer shell (11), the liquid level observation pipe (6) is arranged on the other side of the upper part of the outer shell (11), the water feeding pipe (3) and the cooling water delivery pipe (4) are arranged at the upper part of the outer shell (11), the smoke exhaust pipe (8) is arranged on one side of the lower part of the outer shell (11), the cooling water inlet pipe (9) and the drain pipe (10) are arranged at the lower part of the outer shell (11), the smoke inlet pipe (2), the water adding pipe (3), the cooling water outlet pipe (4), the liquid level observation pipe (6), the smoke exhaust pipe (8), the cooling water inlet pipe (9) and the water discharge pipe (10) penetrate through the outer shell (11) and extend to the inside of the outer shell (11);
the inner shell (12) is provided with a plurality of pipes corresponding to the outer shell (11): the smoke inlet (17), the water inlet (18), the cooling water inlet (19), the liquid level pipe communication port (20), the smoke outlet (21), the cooling water guide outlet (22) and the water outlet (23), wherein the smoke inlet pipe (2) is communicated with the smoke inlet (17) through a hose, the water inlet pipe (3) is communicated with the water inlet (18) through a hose, the cooling water guide pipe (4) is communicated with the cooling water inlet (19) through a hose, the liquid level observation pipe (6) is communicated with the liquid level pipe communication port (20) through a hose, the smoke exhaust pipe (8) is communicated with the smoke outlet (21) through a hose, the cooling water inlet pipe (9) is communicated with the cooling water guide outlet (22) through a hose, and the water outlet pipe (10) is communicated with the water outlet (23) through a hose;
a plurality of pairs of supporting columns (14) are symmetrically arranged at the lower part of the inner shell (12), balls (15) are clamped at the lower ends of the supporting columns (14) in a rolling manner, a plurality of pairs of limiting grooves (16) are fixed on the outer shell (11) in a one-to-one correspondence with the balls (15), the balls (15) can roll in the corresponding limiting grooves (16), a plurality of vibrating motors (13) are arranged on the outer wall of the inner shell (12), and the bodies of the vibrating motors (13) are fixed with the outer shell (11); the inner housing (12) is internally provided with: baffle and heat exchange tube (24), the baffle is a plurality of, and is a plurality of the baffle is used for with the flue of S type is separated into to the inner chamber of interior casing (12), and is a plurality of heat exchange tube (24) run through the baffle is fixed in inside casing (12), the upper end of heat exchange tube (24) with cooling water inlet (19) intercommunication, the lower extreme of heat exchange tube (24) with cooling water outlet (22) intercommunication is led.
2. The secondary heat exchanger for a condensing boiler according to claim 1, wherein said hoses are stainless steel hoses.
3. A secondary heat exchanger for a condensing boiler according to claim 1 or 2, wherein said partition comprises a plurality of: left baffle (25) and right baffle (26), the left end of left side baffle (25) with the inner wall of interior casing (12) is fixed mutually, the right-hand member of left side baffle (25) is flue gas channel, left side baffle (25) is by left right side slope setting, the right-hand member of right side baffle (26) with the inner wall of interior casing (12) is fixed mutually, the left end of right side baffle (26) is flue gas channel, right side baffle (26) is by right side left side slope setting, left side baffle (25) and right baffle (26) interval set up in turn.
4. A secondary heat exchanger for a condensing boiler according to claim 3, characterized in that an on-off button (7) for controlling the on-off of the vibration motor (13) is installed on the outer shell (11).
5. A secondary heat exchanger for a condensing boiler according to claim 1 or 4, wherein the upper end of the liquid level observing tube (6) is provided with a sealing valve (5) for sealing the liquid level observing tube (6).
6. The secondary heat exchanger for a condensing boiler according to claim 5, wherein two vibration motors (13) are used, and the two vibration motors (13) are symmetrically installed at both sides of the inner case (12).
7. A secondary heat exchanger for a condensing boiler according to claim 6, characterized in that said supporting columns (14) are provided in two pairs, and said two pairs of supporting columns (14) are symmetrically disposed on both sides of said inner shell (12).
8. The secondary heat exchanger for a condensing boiler according to claim 1 or 7, characterized in that valves are installed on the smoke inlet pipe (2), the water feeding pipe (3), the cooling water outlet pipe (4), the smoke exhaust pipe (8), the cooling water inlet pipe (9) and the water discharge pipe (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120245096.3U CN214501745U (en) | 2021-09-22 | 2021-09-22 | Secondary heat exchanger for condensing boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120245096.3U CN214501745U (en) | 2021-09-22 | 2021-09-22 | Secondary heat exchanger for condensing boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214501745U true CN214501745U (en) | 2021-10-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120245096.3U Active CN214501745U (en) | 2021-09-22 | 2021-09-22 | Secondary heat exchanger for condensing boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214501745U (en) |
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2021
- 2021-09-22 CN CN202120245096.3U patent/CN214501745U/en active Active
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