Heat exchanger of water heater

Abstract

The utility model discloses a water heater exchanger, and particularly relates to the field of water heater exchangers, and the water heater exchanger is sequentially provided with a burner, a main heat exchanger, at least one middle condenser and a last condenser from top to bottom; the main heat exchanger comprises two first water mixing boxes, a plurality of first finned tubes are installed and communicated between the two first water mixing boxes, and a first water outlet and a first water inlet are formed in the two first water mixing boxes respectively; the middle condenser comprises two second water mixing boxes, a plurality of second finned tubes are installed and communicated between the two second water mixing boxes, and a second water outlet and a second water inlet are formed in the two second water mixing boxes respectively. The water mixing box I, the water mixing box II and the water mixing box III are arranged, so that condensate water flows in the water mixing box I, the water mixing box II and the water mixing box III, the sides, close to gas combustion, of the water mixing box I, the water mixing box II and the water mixing box III can also absorb heat, heat absorption is not limited to finned tubes, and the heat utilization rate is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to hot water machine exchanger technical field more specifically, the utility model relates to a kind of hot water machine exchanger. BACKGROUND

[0002] Hot water machine exchanger is the equipment that cold water is heated into hot water, it is heated using gas, for people to use, mainly for domestic, hotel, hospital, school and the like place's life hot water system.

[0003] The existing hot water machine exchanger mainly includes burner, heat exchanger and condenser, burner burns to heat the water in heat exchanger and condenser, heat exchanger and condenser are evenly arranged with multiple finned tubes, and the communication mode of multiple finned tubes is to adopt elbow to communicate adjacent finned tubes, which makes the heat absorption of heat exchanger and condenser limited to finned tube, and the utilization rate of heat is not high. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of hot water machine exchanger, the problem to be solved is that the heat absorption of heat exchanger and condenser of the existing hot water machine exchanger is limited to finned tube, and the utilization rate of heat is not high.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of hot water machine exchanger, burner, main heat exchanger, at least one middle condenser, last condenser are sequentially installed from top to bottom;Main heat exchanger includes two water mixing boxes one, a plurality of finned tubes one are installed and communicated between the two water mixing boxes one, and water outlet one and water inlet one are respectively arranged on the two water mixing boxes one;Middle condenser includes two water mixing boxes two, a plurality of finned tubes two are installed and communicated between the two water mixing boxes two, and water outlet two and water inlet two are respectively arranged on the two water mixing boxes two;Last condenser includes two water mixing boxes three, a plurality of finned tubes three are installed and communicated between the two water mixing boxes three, and water inlet three and water outlet three are respectively arranged on the two water mixing boxes three;Water outlet three is communicated between the water inlet two of adjacent upper side, water outlet two is communicated with the water inlet one of adjacent upper side, and in adjacent two middle condensers, the water inlet two of upper side middle condenser is communicated with the water outlet two of lower side middle condenser.

[0006] In a preferred embodiment, cooling water pipe one is arranged and communicated on both sides between the two water mixing boxes one, and finned tube one is located between the two cooling water pipes one;Cooling water pipe two is arranged and communicated on both sides between the two water mixing boxes two, and finned tube two is located between the two cooling water pipes two;Cooling water pipe three is arranged and communicated on both sides between the two water mixing boxes one, and finned tube three is located between the two cooling water pipes three.

[0007] In a preferred implementation, the bottom between the two cooling water pipes one is provided with a flow equalizing plate one, the bottom between the two cooling water pipes two is provided with a flow equalizing plate two, and the bottom between the two cooling water pipes three is provided with a flow equalizing plate three.

[0008] In a preferred implementation, the water mixing box one comprises a box body and an end plate, a plurality of pipe openings one are arranged on the end plate, the end portions of the plurality of finned pipes one are inserted into the pipe openings one, and pipe openings two are arranged at both ends of the end plate, and the end portions of the cooling water pipes one are inserted into the pipe openings two.

[0009] In a preferred implementation, the side of the box body close to the end plate is provided with a female opening, the side of the end plate close to the box body is provided with a male opening and a sealing clamping groove one, a sealing ring one is arranged in the sealing clamping groove one, and the male opening is clamped in the female opening.

[0010] In a preferred implementation, the inside of the pipe opening one is provided with a sealing clamping groove two, a sealing ring three is arranged in the sealing clamping groove two, the sealing ring three is used for sealing the end plate and the finned pipe one, a compression nut is threadedly connected to the outer wall of the pipe opening one, the compression nut has an open structure at both ends, the end portion of the inner side of the compression nut is provided with a sealing ring two, and the sealing ring two is used for sealing the compression nut and the finned pipe one.

[0011] In a preferred implementation, the pipe opening two is provided with a sealing clamping groove three, the sealing clamping groove three is provided with a sealing ring four, and the sealing ring four is used for sealing the pipe opening two and the cooling water pipe one.

[0012] In a preferred implementation, the burner comprises an outer shell, the outer shell is fixedly installed at the top of the main heat exchanger, the bottom of the outer shell is provided with a combustion net, the inside of the outer shell is provided with an upper flow equalizing plate, the periphery of the outer shell is provided with a heat insulation plate, one end of the outer shell is connected with a premixer, and the premixer is used for sending a mixture of gas and air into the outer shell.

[0013] In a preferred implementation, the bottom of the last condenser is fixedly provided with a water collecting box, the bottom of the water collecting box is provided with a water outlet, and one side of the water collecting box is provided with a smoke outlet.

[0014] The beneficial effects of the present application are as follows:

[0015] 1. The water mixing box one, the water mixing box two and the water mixing box three are arranged, the condensate water flows in the water mixing box one, the water mixing box two and the water mixing box three, the side close to the gas combustion of the water mixing box one, the water mixing box two and the water mixing box three can also absorb heat, so that the heat absorption is not limited to the finned pipe, and the heat utilization rate is higher.

[0016] 2. The cooling water pipes are arranged, the heat utilization rate can be further improved, and a heat insulation member does not need to be arranged at the position of the cooling water pipes to prevent heat loss.

[0017] 3. The utility model discloses a dismounting structure, if the finned tube or cooling water pipe is damaged, can conveniently replace. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is whole structure schematic diagram of the utility model.

[0019] Figure 2 It is structure schematic diagram of the utility model burner.

[0020] Figure 3 It is sectional view of the utility model burner.

[0021] Figure 4 It is main heat exchanger structure schematic of the utility model Figure 1 .

[0022] Figure 5 It is main heat exchanger structure schematic of the utility model Figure 2 .

[0023] Figure 6 It is condenser structure schematic in the utility model Figure 1 .

[0024] Figure 7 It is condenser structure schematic in the utility model Figure 2 .

[0025] Figure 8 It is last condenser structure schematic in the utility model Figure 1 .

[0026] Figure 9 It is last condenser structure schematic in the utility model Figure 2 .

[0027] Figure 10 It is the schematic diagram of the utility model box body and end plate installation.

[0028] Figure 11 It is the schematic diagram of the utility model finned tube one and end plate installation.

[0029] Figure 12 It is the schematic diagram of the utility model cooling water pipe one and end plate installation.

[0030] The reference signs are: 1, burner; 11, shell; 12, premixer; 121, fan; 122, Venturi; 123, gas valve; 13, combustion net; 14, upper flow uniformizing plate; 15, heat insulation plate; 2, main heat exchanger; 21, water mixing box one; 22, finned tube one; 23, water inlet one; 24, water outlet one; 25, cooling water pipe one; 26, flow uniformizing plate one; 201, ignition needle; 202, flame sensing needle; 211, box body; 2111, female port; 212, end plate; 2121, pipe port one; 2122, pipe port two; 2123, sealing clamping groove one; 2124, male port; 2125, sealing clamping groove two; 2126, sealing clamping groove three; 213, sealing ring one; 214, compression nut; 215, sealing ring two; 216, sealing ring three; 217, sealing ring four; 3, intermediate condenser; 31, water mixing box two; 32, finned tube two; 33, water inlet two; 34, water outlet two; 35, cooling water pipe two; 36, flow uniformizing plate two; 4, final condenser; 41, water mixing box three; 42, finned tube three; 43, water outlet three; 44, water inlet three; 45, cooling water pipe three; 46, flow uniformizing plate three; 5, water collecting box; 51, water outlet; 52, smoke outlet. DETAILED DESCRIPTION

[0031] The application will be further described in detail below with reference to the drawings. It is necessary to point out here that the following detailed description is only used to further illustrate the application and cannot be understood as limiting the protection scope of the application. Those skilled in the art can make some non-essential improvements and adjustments to the application according to the above application content.

[0032] The description is accompanied by Figures 1-12 A hot water machine exchanger, from top to bottom, is sequentially provided with a burner 1, a main heat exchanger 2, at least one intermediate condenser 3, and a final condenser 4.

[0033] In the embodiment, the main heat exchanger 2 comprises two water mixing boxes one 21, a plurality of finned tubes one 22 are installed and communicated between the two water mixing boxes one 21, and the two water mixing boxes one 21 are respectively provided with a water outlet one 24 and a water inlet one 23.

[0034] In the embodiment, the intermediate condenser 3 comprises two water mixing boxes two 31, a plurality of finned tubes two 32 are installed and communicated between the two water mixing boxes two 31, and the two water mixing boxes two 31 are respectively provided with a water outlet two 34 and a water inlet two 33.

[0035] In the embodiment, the final condenser 4 comprises two water mixing boxes three 41, a plurality of finned tubes three 42 are installed and communicated between the two water mixing boxes three 41, and the two water mixing boxes three 41 are respectively provided with a water inlet three 44 and a water outlet three 43.

[0036] Among them, the outlet 3 43 is connected to the adjacent inlet 2 33 above, and the outlet 2 34 is connected to the adjacent inlet 1 23 above. In the two adjacent intermediate condensers 3, the inlet 2 33 of the upper intermediate condenser 3 is connected to the outlet 2 34 of the lower intermediate condenser 3.

[0037] Furthermore, a water collection tank 5 is fixedly installed at the bottom of the final condenser 4, and a water outlet 51 is provided at the bottom of the water collection tank 5. A flue gas outlet 52 is provided on one side of the water collection tank 5.

[0038] like Figure 4 and Figure 5 As shown, the outlet 24 is located on one side of the mixing box 21, and the inlet 23 is located below the mixing box 21. Figure 6 and Figure 7 As shown, outlet 2 34 is located above mixing box 2 31, and inlet 2 33 is located below mixing box 2 31, as... Figure 8 and Figure 9 As shown, the inlet 344 is located on one side of the mixing box 341, and the outlet 343 is located above the mixing box 341.

[0039] In this embodiment, the specific implementation method is as follows: Figure 1 As shown, there are two intermediate condensers 3. The condensate enters the interior of one of the mixing boxes 3 41 from the inlet 3 44, then enters the interior of the other mixing box 3 41 through the finned tube 3 42, and then enters the interior of the mixing box 3 31 from the outlet 3 43 on the mixing box 3 41 through the inlet 2 33, that is, it flows into the interior of the intermediate condenser 3 located below. Then, the condensate flows from mixing box 2 31 through finned tube 2 32 into the interior of another mixing box 2 31, and then from the outlet 2 34 on this mixing box 2 31 upwards through the inlet 2 33 into the interior of the upper mixing box 2 31, which is to say, it flows into the interior of the upper intermediate condenser 3. Similarly, the condensate then flows from mixing box 2 31 through finned tube 2 32 into the interior of another mixing box 2 31, and then from the outlet 2 34 on this mixing box 2 31 upwards through the inlet 1 23 into the interior of mixing box 1 21, and then from mixing box 1 21 through finned tube 1 22 into another mixing box 1 21, and then flows out from the outlet 1 24 on this mixing box 1 21. In other words, the condensate flows in from the inlet 3 44 of the lowest final condenser 4, flows through the two intermediate condensers 3 and the main heat exchanger 2 in sequence, and then flows out from the outlet 1 24. The same principle applies when there is one, three, four or even more intermediate condensers 3.

[0040] After the mixture of fuel gas and air is burned in burner 1, the flue gas flows downwards, passing sequentially through the main heat exchanger 2, the intermediate condenser 3, and the final condenser 4, and is finally discharged from the exhaust port 52. The condensate produced during the downward flow of the flue gas is discharged from the water outlet 51. During this process, finned tube 1 22, finned tube 2 32, and finned tube 3 42 absorb heat, thereby heating the condensate.

[0041] The above technical solution, by setting up mixing box 1 21, mixing box 2 31 and mixing box 3 41, allows condensate to flow inside them. The side of mixing box 1 21, mixing box 2 31 and mixing box 3 41 that is close to the gas combustion can also absorb heat, so the heat absorption is not limited to the finned tube, and the heat utilization rate is higher.

[0042] In this embodiment, as Figures 4-9 As shown, cooling water pipes 25 are provided and connected to both sides between the two mixing boxes 21, and finned tube 22 is located between the two cooling water pipes 25; cooling water pipes 35 are provided and connected to both sides between the two mixing boxes 31, and finned tube 32 is located between the two cooling water pipes 35; cooling water pipes 45 are provided and connected to both sides between the two mixing boxes 21, and finned tube 42 is located between the two cooling water pipes 45.

[0043] It should be noted that the water in mixing box 1 21 can flow into another mixing box 1 21 through cooling water pipe 1 25, the water in mixing box 2 31 can flow into another mixing box 2 31 through cooling water pipe 2 35, and the water in mixing box 3 41 can flow into another mixing box 3 41 through cooling water pipe 3 45. The side of cooling water pipe 1 25, cooling water pipe 2 35, and cooling water pipe 3 45 that is close to the combustion of the gas can also absorb heat, thereby further improving the heat utilization rate, and there is no need to install heat insulation components at the location of the cooling water pipes to prevent heat loss.

[0044] Furthermore, such as Figure 5 , Figure 7 and Figure 9 As shown, a flow equalization plate 26 is installed at the bottom between two cooling water pipes 25, a flow equalization plate 36 is installed at the bottom between two cooling water pipes 35, and a flow equalization plate 46 is installed at the bottom between two cooling water pipes 45.

[0045] It should be noted that the flow equalization plate 26, flow equalization plate 36 and flow equalization plate 46 can make the downward flowing flue gas evenly distributed, which is more conducive to the absorption of the corresponding finned tube.

[0046] In this embodiment, as Figure 10As shown, the mixing box 21 includes a box body 211 and an end plate 212. The end plate 212 is provided with a number of pipe openings 2121. The ends of a number of finned tubes 22 are inserted into the pipe openings 2121. Both ends of the end plate 212 are provided with pipe openings 2122. The ends of cooling water pipes 25 are inserted into the pipe openings 2122.

[0047] Furthermore, such as Figure 10 As shown, the box body 211 is provided with a female opening 2111 on the side near the end plate 212, and the end plate 212 is provided with a male opening 2124 and a sealing groove 2123 on the side near the box body 211. A sealing ring 213 is provided in the sealing groove 2123, and the male opening 2124 is locked in the female opening 2111.

[0048] It should be noted that when installing the box body 211 and the end plate 212, first place the sealing ring 213 into the sealing groove 2123, then close the box body 211 and the end plate 212, insert the female opening 2124 into the female opening 2111, and then tighten the box body 211 and the end plate 212 with screws to achieve the installation and sealing of both.

[0049] Furthermore, such as Figure 11 As shown, a sealing groove 2125 is provided inside the pipe opening 2121, and a sealing ring 216 is provided inside the sealing groove 2125. The sealing ring 216 is used to seal the end plate 212 and the finned tube 22. A clamping nut 214 is threadedly connected to the outer wall of the pipe opening 2121. The clamping nut 214 has an open structure at both ends. A sealing ring 215 is provided at the inner end of the clamping nut 214. The sealing ring 215 is used to seal the clamping nut 214 and the finned tube 22.

[0050] It should be noted that when installing finned tube 22, first place sealing ring 216 in the position of sealing groove 2125, then insert finned tube 22 into pipe opening 2121, then press sealing ring 215 into the inside of clamping nut 214, and then thread clamping nut 214 onto the outside of pipe opening 2121 to press the end of finned tube 22, thereby achieving the installation positioning and sealing of finned tube 22.

[0051] Furthermore, such as Figure 12 As shown, a sealing groove 2126 is provided on the pipe opening 2122, and a sealing ring 217 is provided on the sealing groove 2126. The sealing ring 217 is used to seal the pipe opening 2122 and the cooling water pipe 25.

[0052] It should be noted that when installing cooling water pipe 25, first put sealing ring 217 on sealing groove 2126, and then put cooling water pipe 25 on pipe opening 2122 to achieve the installation and sealing of cooling water pipe 25.

[0053] In this embodiment, the structures of mixing box 2 31 and mixing box 3 41 can be designed as those of mixing box 1 21. The installation of finned tube 2 32 and mixing box 2 31, and finned tube 3 42 and mixing box 3 41, can both adopt the installation method of finned tube 1 22 and mixing box 1 21. Similarly, the installation of cooling water pipe 2 35 and mixing box 2 31, and cooling water pipe 3 45 and mixing box 3 41, can both adopt the installation method of cooling water pipe 1 25 and mixing box 1 21. With the above-mentioned disassembly and assembly structure, if the finned tube or cooling water pipe is damaged, it can be easily replaced.

[0054] In this embodiment, as Figures 1-3 As shown, the burner 1 includes a housing 11, which is fixedly installed on the top of the main heat exchanger 2. A combustion mesh 13 is installed at the bottom of the housing 11. An upper flow equalization plate 14 is installed inside the housing 11. A heat insulation plate 15 is installed around the housing 11. A premixer 12 is connected to one end of the housing 11. The premixer 12 is used to send a mixture of fuel gas and air into the housing 11.

[0055] It should be noted that the premixer 12 adopts the existing technology structure, which mainly consists of a fan 121, a venturi 122 and a gas valve 123. The gas enters the fan 121 through the gas valve 123 and the venturi 122. After mixing with air in the fan 121, it enters the outer casing 11. An ignition needle 201 and a flame sensor 202 are installed on the side wall of the mixing box 21, that is, on one of the cooling water pipes 25. The ignition needle 201 ignites the gas, causing it to burn. The flame sensor 202 senses the high temperature of the flame and generates an electrical signal. The electrical signal is then transmitted to the control system. Once the sensing needle senses an abnormality in the flame, the control system will receive this signal and trigger the automatic intake shut-off mechanism.

[0056] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A heat exchanger for a hot water machine, comprising, from top to bottom, a burner (1), a main heat exchanger (2), at least one intermediate condenser (3), and a final condenser (4), characterized in that: The main heat exchanger (2) includes two mixing boxes (21), and a number of finned tubes (22) are installed and connected between the two mixing boxes (21). The two mixing boxes (21) are respectively provided with an outlet (24) and an inlet (23). The intermediate condenser (3) includes two mixing boxes (31), and a number of finned tubes (32) are installed and connected between the two mixing boxes (31). The two mixing boxes (31) are respectively provided with an outlet (34) and an inlet (33). The final condenser (4) includes two mixing boxes (41), and a number of finned tubes (42) are installed and connected between the two mixing boxes (41). The two mixing boxes (41) are respectively provided with an inlet (44) and an outlet (43). The outlet 3 (43) is connected to the adjacent inlet 2 (33) above, and the outlet 2 (34) is connected to the adjacent inlet 1 (23) above. In the two adjacent intermediate condensers (3), the inlet 2 (33) of the upper intermediate condenser (3) is connected to the outlet 2 (34) of the lower intermediate condenser (3).

2. A water heater heat exchanger according to claim 1, characterized in that: Cooling water pipes (25) are provided and connected on both sides between the two mixing boxes (21), and the finned tube (22) is located between the two cooling water pipes (25). Cooling water pipes (35) are provided and connected on both sides between the two mixing boxes (31), and the finned tube (32) is located between the two cooling water pipes (35); Cooling water pipes (45) are provided and connected on both sides between the two mixing boxes (21), and the finned tube (42) is located between the two cooling water pipes (45).

3. A water heater heat exchanger according to claim 2, characterized in that: A flow equalization plate 1 (26) is installed at the bottom between the two cooling water pipes 1 (25), a flow equalization plate 2 (36) is installed at the bottom between the two cooling water pipes 2 (35), and a flow equalization plate 3 (46) is installed at the bottom between the two cooling water pipes 3 (45).

4. A water heater exchanger according to claim 2, characterized in that: The mixing box (21) includes a box body (211) and an end plate (212). The end plate (212) is provided with a plurality of pipe openings (2121). The ends of a plurality of finned tubes (22) are inserted into the pipe openings (2121). Both ends of the end plate (212) are provided with pipe openings (2122). The ends of the cooling water pipes (25) are inserted into the pipe openings (2122).

5. A water heater exchanger according to claim 4, characterized in that: The box body (211) has a female opening (2111) on the side near the end plate (212), and the end plate (212) has a female opening (2124) and a sealing groove (2123) on the side near the box body (211). A sealing ring (213) is provided in the sealing groove (2123), and the female opening (2124) is locked in the female opening (2111).

6. A water heater heat exchanger according to claim 5, characterized in that: The inner part of the first pipe opening (2121) is provided with a second sealing groove (2125), and a third sealing ring (216) is provided in the second sealing groove (2125). The third sealing ring (216) is used to seal the end plate (212) and the first finned tube (22). A clamping nut (214) is threaded on the outer wall of the first pipe opening (2121). The clamping nut (214) has an open structure at both ends. A second sealing ring (215) is provided at the inner end of the clamping nut (214). The second sealing ring (215) is used to seal the clamping nut (214) and the first finned tube (22).

7. A water heater heat exchanger according to claim 6, characterized in that: The second pipe opening (2122) is provided with a sealing groove three (2126), and the sealing groove three (2126) is provided with a sealing ring four (217), which is used to seal the second pipe opening (2122) and the first cooling water pipe (25).

8. A water heater heat exchanger according to claim 1, characterized in that: The burner (1) includes a housing (11), which is fixedly installed on the top of the main heat exchanger (2). A combustion mesh (13) is installed at the bottom of the housing (11). An upper flow equalization plate (14) is installed inside the housing (11). A heat insulation plate (15) is installed around the housing (11). A premixer (12) is connected to one end of the housing (11). The premixer (12) is used to send a mixture of fuel gas and air into the housing (11).

9. A water heater heat exchanger according to claim 1, characterized in that: A water collection tank (5) is fixedly installed at the bottom of the final condenser (4). A water outlet (51) is provided at the bottom of the water collection tank (5), and a flue gas outlet (52) is provided on one side of the water collection tank (5).

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