CN214120411U

CN214120411U - Full premix heat exchanger and have its gas hot water system

Info

Publication number: CN214120411U
Application number: CN202022197424.5U
Authority: CN
Inventors: 卢宇轩; 龙延山
Original assignee: Guangdong Vanward New Electric Co Ltd
Current assignee: Guangdong Vanward New Electric Co Ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-09-03
Anticipated expiration: 2030-09-29

Abstract

The utility model discloses a full premix heat exchanger, including shell, combustor subassembly, annular heat exchanger and the pipe of discharging fume, the combustor subassembly is installed in the one end of shell and is located the shell, annular heat exchanger is installed in the shell and is located the outside of combustor subassembly, annular heat exchanger is equipped with second water inlet and heating water delivery port, the pipe of discharging fume locates the other end of shell and is linked together with the shell is inside, be provided with airtight water storage shell in the shell and below the annular heat exchanger, be provided with first water inlet, first delivery port on the water storage shell, first delivery port is linked together with the second water inlet; a plurality of turbulent flow smoke pipes are arranged in the water storage shell, one ends of the turbulent flow smoke pipes are communicated with the inside of the shell, and the other ends of the turbulent flow smoke pipes are communicated with the smoke exhaust pipe. The utility model discloses in, hot flue gas can preheat the cold water in the water storage casing, has increased the heat transfer time of cold water and vortex tobacco pipe, has improved the utilization ratio of heat transfer effect and hot flue gas.

Description

Full premix heat exchanger and have its gas hot water system

Technical Field

The utility model relates to a hanging stove technical field, more specifically relates to a full premix heat exchanger and have its gas hot water system.

Background

When current hanging stove is in the use, the hot flue gas that the combustor produced carries out the heat exchange with the heat exchanger, and hot flue gas contacts the back with the heat exchanger for a short time, and hot flue gas is discharged through the pipe of discharging fume immediately, and hot flue gas is short with the heat exchanger contact time to there is the not high problem of heat exchange efficiency. Chinese patent application, publication No. CN206420160U, discloses a main heat exchanger of a fully premixed gas heating water heater, comprising a rear shell and a front cover mounted on the rear shell; the rear shell and the front cover form a closed space, the radial section of the rear shell is circular, a spiral annular coil is installed in the rear shell, two joints of the annular coil are downward, an annular flue is formed between the outer side wall of the annular coil and the inner side wall of the rear shell, and the rear shell is provided with a smoke exhaust port communicated with the flue; the front cover is provided with a burner extending into the annular center of the annular coil pipe, and the side wall of the burner is provided with uniformly arranged air outlet holes; the front cover is provided with an air inlet communicated with the interior of the combustor; and an ignition electrode is arranged on the front cover. In the technical scheme, hot flue gas generated by the combustor is subjected to heat exchange with the annular coil pipe and then is rapidly discharged through the smoke outlet. This patent has hot flue gas and heat exchanger contact time weak point equally to lead to the not high problem of heat exchanger heat exchange efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a when overcoming among the above-mentioned prior art heat exchanger and hot flue gas heat exchange, the problem that the heat exchange efficiency is low of existence provides a full premix heat exchanger.

In order to solve the technical problem, the utility model discloses a technical scheme is: a full-premix heat exchanger comprises a shell, a burner assembly, an annular heat exchanger and a smoke exhaust pipe, wherein the burner assembly is installed at one end of the shell and is positioned in the shell, the annular heat exchanger is installed in the shell and is positioned on the outer side of the burner assembly, the annular heat exchanger is provided with a second water inlet and a heating water outlet, the smoke exhaust pipe is arranged at the other end of the shell and is communicated with the interior of the shell, a closed water storage shell is arranged in the shell and below the annular heat exchanger, a first water inlet and a first water outlet are formed in the water storage shell, and the first water outlet is communicated with the second water inlet; the water storage shell is internally provided with a plurality of turbulent flow smoke pipes, one ends of the turbulent flow smoke pipes are communicated with the inside of the shell, and the other ends of the turbulent flow smoke pipes are communicated with the smoke discharge pipe.

In one embodiment, the water storage shell is internally provided with an injection pipe communicated with the first water inlet, and the outer peripheral surface of the injection pipe is provided with a plurality of injection holes.

In one embodiment, the turbulent smoke tube penetrates through the upper end surface and the lower end surface of the water storage shell.

In one embodiment, the turbulator tubes are corrugated.

In one embodiment, a heat insulation plate is arranged in a ring of the annular heat exchanger, a support column is arranged between the heat insulation plate and the water storage shell, one end of the support column is connected with the water storage shell, and the other end of the support column is connected with the heat insulation plate.

In one embodiment, the annular heat exchanger is a coil, fins are arranged on the outer wall of the coil, and spoilers are arranged in the pipe of the annular heat exchanger.

In one embodiment, an annular heat insulation layer is arranged inside the shell and is positioned on the outer sides of the annular heat exchanger and the water storage shell.

In one embodiment, the first water inlet is disposed at the bottom of the housing and the heating water outlet is disposed at the top of the burner assembly.

In one embodiment, the shell comprises an upper shell, a middle shell and a bottom shell which are sequentially connected, the smoke exhaust pipe is arranged on the bottom shell, and the turbulent smoke pipe is communicated with the smoke exhaust pipe through the bottom shell; and a water outlet for draining condensed water is formed in the bottom shell.

The utility model discloses another aspect provides a gas hot water system, include as above the full premix heat exchanger.

The utility model discloses a full premix heat exchanger compares with the background art, and the beneficial effect of production is: when the fully premixed heat exchanger is used, cold water flows into the water storage shell from the first water inlet, flows into the annular heat exchanger from the second water inlet communicated with the first water outlet, and finally flows out from the heating water outlet. In the combustion process of the burner assembly, a large amount of hot flue gas generated firstly exchanges heat with the annular heat exchanger to heat cold water in the annular heat exchanger; the hot flue gas after exchanging heat with the annular hot heat exchanger flows into the turbulent flow tobacco pipe, and the hot flue gas exchanges heat with the cold water in the water storage shell and preheats the cold water in the water storage shell, so that the cold water filled into the water storage shell can exchange heat with the turbulent flow tobacco pipe, the heat exchange time of the cold water and the turbulent flow tobacco pipe is prolonged, and the heat exchange effect and the utilization efficiency of the hot flue gas are improved.

Drawings

FIG. 1 is a schematic structural view of a fully premixed heat exchanger of the present invention;

FIG. 2 is an exploded view of the fully premixed heat exchanger of the present invention;

FIG. 3 is a perspective view of the fully premixed heat exchanger of the present invention;

FIG. 4 is a partially exploded view of the fully premixed heat exchanger of the present invention;

FIG. 5 is a schematic structural view of a ring heat exchanger in the fully premixed heat exchanger of the present invention;

FIG. 6 is a schematic structural view of a spoiler in the fully premixed heat exchanger of the present invention;

FIG. 7 is a schematic structural view of a turbulent flue tube in the fully premixed heat exchanger of the present invention;

fig. 8 is a schematic structural diagram of a bottom shell in the fully premixed heat exchanger of the present invention;

fig. 9 is an exploded view of the mounting cover of the fully premixed heat exchanger of the present invention.

In the drawings: 1-shell, 2-burner component, 3-annular heat exchanger, 4-smoke exhaust pipe, 5-water storage shell, 6-turbulent flow smoke pipe, 7-injection pipe, 8-injection hole, 9-heat insulation plate, 10-support column, 11-upper shell, 12-middle shell, 13-bottom shell, 14-annular heat insulation layer, 15-water outlet, 16-counter bore, 17-screw structure, 18-temperature sensor, 19-first sealing ring, 20-second sealing ring, 21-mounting cover, 22-burner, 23-gas inlet, 24-ignition needle component, 25-third sealing ring, 26-channel, 27-cavity, 31-second water inlet, 32-heating water outlet, 33-fin, etc, 34-spoiler, 35-shell, 51-first water inlet, 52-first water outlet, 53-screw column, 211-upper cover and 212-lower cover.

Detailed Description

As shown in fig. 1 to 9, a fully premixed heat exchanger comprises a shell 1, a burner assembly 2, an annular heat exchanger 3 and a smoke exhaust pipe 4, wherein the burner assembly 2 is installed at one end of the shell 1 and is located in the shell 1, the annular heat exchanger 3 is installed in the shell 1 and is located on the outer side of the burner assembly 2, the annular heat exchanger 3 is provided with a second water inlet 31 and a heating water outlet 32, the smoke exhaust pipe 4 is installed at the other end of the shell 1 and is communicated with the inside of the shell 1, a closed water storage shell 5 is arranged in the shell 1 and below the annular heat exchanger 3, a first water inlet 51 and a first water outlet 52 are arranged on the water storage shell 5, and the first water outlet 52 is communicated with the second water inlet 31; a plurality of turbulent flow smoke pipes 6 are arranged in the water storage shell 5, one end of each turbulent flow smoke pipe 6 is communicated with the inside of the shell 1, and the other end of each turbulent flow smoke pipe 6 is communicated with the smoke exhaust pipe 4. The bottom of the water storage shell 5 is provided with a screw post 53, and the screw post 53 is installed in a counter bore 16 arranged at the bottom of the shell 1 and connected through a screw. The burner assembly 2 includes a mounting cover 21 mounted on one end of the housing 1, a burner 22 and an ignition needle assembly 24 mounted on the mounting cover 21, the mounting cover 21 is connected to the housing 1 by a screw structure 17, a gas inlet 23 is disposed on the mounting cover 21, and a heating water outlet 32 is exposed from the mounting cover 21. The mounting cover 21 includes an upper cover 211 and a lower cover 212 connected to each other, the gas inlet 23 is provided on the upper cover 211, and the burner 22 is mounted on the lower cover 212. It should be noted that a cavity 27 is formed between the bottom of the housing 1 and the bottom of the water storage housing 5, and the cavity 27 is favorable for the hot flue gas to flow out of the turbulent flue pipe 6 and then to be discharged from the smoke discharge pipe 4 after passing through the cavity.

In the embodiment, when the fully premixed heat exchanger is used, cold water flows into the water storage shell 5 from the first water inlet 51, flows into the annular heat exchanger 3 from the second water inlet 31 communicated with the first water outlet 52, and finally flows out from the heating water outlet 32. In the combustion process of the burner assembly 2, a large amount of hot flue gas generated firstly exchanges heat with the annular heat exchanger 3 to heat cold water in the annular heat exchanger 3; the hot flue gas after exchanging heat with the annular hot heat exchanger flows into the turbulent flow tobacco pipe 6, the hot flue gas exchanges heat with the cold water in the water storage shell 5, and the cold water in the water storage shell 5 is preheated, and after the cold water enters the water storage shell 5, the cold water fully poured into the water storage shell 5 can exchange heat with the turbulent flow tobacco pipe 6, so that the heat exchange time of the cold water and the turbulent flow tobacco pipe 6 is prolonged, and the heat exchange effect and the utilization efficiency of the hot flue gas are improved.

In one embodiment, as shown in fig. 1, a spray pipe 7 communicating with the first water inlet 51 is disposed in the water storage housing 5, and a plurality of spray holes 8 are disposed on an outer circumferential surface of the spray pipe 7. In the embodiment, external cold water enters from the first water inlet 51 and is then sprayed out from the spraying hole 8 through the spraying pipe 7, so that the cold water is dispersedly injected into the water storage shell 5, and the heat exchange between the cold water and the turbulent smoke pipe 6 is more balanced.

In one embodiment, as shown in fig. 1, 4 and 7, the turbulent smoke tube 6 is disposed through the upper and lower end surfaces of the water storage housing 5. In this embodiment, the turbulent smoke tube 6 can be vertically disposed between the upper and lower end surfaces of the water storage housing 5. Similarly, the turbulent smoke tube 6 can be obliquely arranged between the upper end surface and the lower end surface of the water storage shell 5. In addition, the turbulent smoke tube 6 can also be arranged on the upper and lower end surfaces of the water storage shell 5 in a spiral structure. Specifically, two ends of the turbulent smoke tube 6 are flush with the upper end surface and the lower end surface of the water storage shell 5, so that hot smoke can smoothly enter the turbulent smoke tube 6.

In one embodiment, as shown in fig. 1, 4 and 7, the burbling smoke tube 6 is corrugated, on one hand, the resistance of the hot smoke flowing in the burbling smoke tube 6 is increased, the flowing speed of the hot smoke is slowed down, and the heat exchange time between the hot smoke and the cold water in the water storage shell 5 is prolonged; on the other hand, the surface area of the turbulent smoke tube 6 is increased, so that the contact area between the turbulent smoke tube 6 and cold water in the water storage shell 5 is increased, and the heat exchange efficiency between hot smoke and the cold water is improved.

In one embodiment, as shown in fig. 1 and 4, a heat insulation plate 9 is arranged in a ring of the annular heat exchanger 3, a support column 10 is arranged between the heat insulation plate 9 and the water storage shell 5, one end of the support column 10 is connected with the water storage shell 5, and the other end of the support column 10 is connected with the heat insulation plate 9. In the embodiment, the heat insulation plate 9 increases the flow resistance of the hot flue gas and slows down the flow speed of the hot flue gas, thereby prolonging the heat exchange time between the hot flue gas and the annular heat exchanger 3. It should be noted that the heat insulating plate 9 is preferably disposed at a position below the axially middle portion of the annular heat exchanger 3. The arrangement of the heat insulation plate 9 enables most of hot flue gas generated by the burner 22 to enter a channel 26 formed by the outer side of the annular heat exchanger 3 and the shell 1 from gaps among the layers of pipes of the annular heat exchanger 3 after heat exchange with the middle upper part of the annular heat exchanger 3, and then the hot flue gas continuously flows in the channel 26 and finally enters the turbulent flue pipe 6. And a small part of hot flue gas flows towards the direction of the turbulent flue pipe 6 from a gap between the inner side of the annular heat exchanger 3 and the outer edge of the heat insulation plate 9 and finally enters the turbulent flue pipe 6.

In one embodiment, as shown in fig. 5, the annular heat exchanger 3 is a coil, fins 33 are arranged on the outer wall of the coil, and the fins 33 increase the heat exchange area between the annular heat exchanger 3 and the hot flue gas, thereby improving the heat exchange efficiency and the heat exchange effect between the hot flue gas and the annular heat exchanger 3. It should be noted that the fins 33 may be welded to the outer wall of the coil. As shown in fig. 6, a spoiler 34 is disposed inside the pipe of the annular heat exchanger 3, and the spoiler 34 can generate a disturbing effect on the cold water flowing in the annular heat exchanger 3, thereby facilitating the cold water to be heated evenly. It should be noted that the spoiler 34 is installed in the tube of the annular heat exchanger 3, and since the openings of the second water inlet 31 and the heating water outlet 32 of the annular heat exchanger 3 are smaller than the transverse dimension of the spoiler 34, the spoiler 34 is not easily separated from the tube of the annular heat exchanger 3.

In one embodiment, as shown in fig. 1 and 2, an annular heat insulation layer 14 is arranged inside the shell 1, and the annular heat insulation layer 14 is positioned outside the annular heat exchanger 3 and the water storage shell 5. In this embodiment, the annular heat insulating layer 14 can prevent heat exchange between the hot flue gas and the housing 1, reduce heat loss of the hot flue gas, and improve utilization efficiency of the hot flue gas. It should be noted that the outer side of the annular heat exchanger 3 is provided with a plate shell 35 connected with the circumferential surface of the water storage shell 6, and the plate shell 35 surrounds the annular heat exchanger 3 therein, so that the heat exchange effect between the hot flue gas and the annular heat exchanger 3 is ensured.

In one embodiment, as shown in fig. 1 and 3, the first water inlet 51 is disposed at the bottom of the housing 1, and the heating water outlet 32 is disposed at the top of the burner assembly 2. In this embodiment, external cold water flows into the water storage housing 5 through the first water inlet 51, and then flows out through the heating water outlet 32.

In one embodiment, as shown in fig. 1 to 3, the housing 1 includes an upper shell 11, a middle shell 12 and a bottom shell 13 connected in sequence, the smoke exhaust pipe 4 is disposed on the bottom shell 13, and the turbulent smoke pipe 6 is communicated with the smoke exhaust pipe 4 through the bottom shell 13; the bottom case 13 is provided with a drain port 15 for draining condensed water. It should be noted that the upper shell 11 and the middle shell 12 are also connected by a screw structure 17, a first sealing ring 19 is disposed at a joint between the upper shell 11 and the burner assembly 2, a second sealing ring 20 is disposed at a joint between the upper shell 11 and the middle shell 12, and a third sealing ring 25 is disposed at a joint between the middle shell 12 and the bottom shell 13. In order to detect the temperature of the exhaust gas in the exhaust pipe 4, a temperature sensor 18 is provided in the exhaust pipe 4.

Example 2

A gas-fired water heating device comprising the fully premixed heat exchanger of embodiment 1. The gas water heater may be a wall-mounted boiler, a gas water heater, or the like.

In the detailed description of the embodiments, various technical features may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a full premix heat exchanger, includes shell (1), combustor subassembly (2), annular heat exchanger (3) and discharges fume tub (4), install combustor subassembly (2) the one end of shell (1) is located in shell (1), install annular heat exchanger (3) in shell (1) and be located the outside of combustor subassembly (2), annular heat exchanger (3) are equipped with second water inlet (31) and heating water delivery port (32), discharge fume pipe (4) and locate the other end of shell (1) and with shell (1) inside is linked together, its characterized in that: a closed water storage shell (5) is arranged in the shell (1) and below the annular heat exchanger (3), a first water inlet (51) and a first water outlet (52) are formed in the water storage shell (5), and the first water outlet (52) is communicated with the second water inlet (31); the water storage shell (5) is internally provided with a plurality of turbulent flow smoke pipes (6), one ends of the turbulent flow smoke pipes (6) are communicated with the inside of the shell (1), and the other ends of the turbulent flow smoke pipes (6) are communicated with the smoke exhaust pipe (4).

2. A fully premixed heat exchanger according to claim 1 wherein: the water storage shell (5) is internally provided with an injection pipe (7) communicated with the first water inlet (51), and the peripheral surface of the injection pipe (7) is provided with a plurality of injection holes (8).

3. A fully premixed heat exchanger according to claim 1 wherein: the turbulent flow smoke pipe (6) penetrates through the upper end face and the lower end face of the water storage shell (5).

4. A fully premixed heat exchanger according to claim 3 wherein: the turbulent smoke tube (6) is corrugated.

5. A fully premixed heat exchanger according to claim 1 wherein: the ring of the annular heat exchanger (3) is internally provided with a heat insulation plate (9), a support column (10) is arranged between the heat insulation plate (9) and the water storage shell (5), one end of the support column (10) is connected with the water storage shell (5), and the other end of the support column (10) is connected with the heat insulation plate (9).

6. A fully premixed heat exchanger according to claim 1 wherein: the annular heat exchanger (3) is a coil pipe, fins (33) are arranged on the outer wall of the coil pipe, and spoilers (34) are arranged in the pipe of the annular heat exchanger (3).

7. A fully premixed heat exchanger according to claim 1 wherein: an annular heat insulation layer (14) is arranged inside the shell (1), and the annular heat insulation layer (14) is located on the outer sides of the annular heat exchanger (3) and the water storage shell (5).

8. A fully premixed heat exchanger according to claim 1 wherein: the first water inlet (51) is arranged at the bottom of the shell (1), and the heating water outlet (32) is arranged at the top of the burner assembly (2).

9. A fully premixed heat exchanger according to any one of claims 1 to 8 wherein: the shell (1) comprises an upper shell (11), a middle shell (12) and a bottom shell (13) which are sequentially connected, the smoke exhaust pipe (4) is arranged on the bottom shell (13), and the turbulent smoke pipe (6) is communicated with the smoke exhaust pipe (4) through the bottom shell (13); a drain outlet (15) for draining condensed water is arranged on the bottom shell (13).

10. A gas water heater is characterized in that: comprising a fully premixed heat exchanger according to any of claims 1 to 9.