Condensing heat exchanger and gas water heater

Abstract

The utility model belongs to the technical field of heat supply, and particularly discloses a condensing heat exchanger and a gas water heater. The condensation heat exchanger comprises a shell and a condensation pipe assembly. A containing cavity is formed in the shell, a smoke inlet and a smoke outlet which are communicated with the containing cavity are formed in the shell, the smoke outlet is located in the side face of the shell, a flow guide plate is arranged in the containing cavity, a smoke inlet channel is defined by one side face of the flow guide plate and the inner wall of the shell, and a smoke outlet is formed in the other side face of the flow guide plate. An inlet of the smoke inlet channel is communicated with the smoke inlet, and the flow area of the smoke inlet channel is gradually reduced in the flowing direction of smoke; the condensation pipe assembly is arranged in the shell and located between the outlet of the smoke inlet channel and the smoke outlet. The condensing heat exchanger can be installed outdoors and is high in heat exchange efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of heating, in particular to a condensing heat exchanger and a gas water heater. Background Art

[0002] Condensing gas water heaters are generally equipped with a condensing heat exchanger, which can recycle the heat in the flue gas, transfer the heat in the flue gas to cold water, heat the water flow, and thus make full use of the waste heat of the flue gas.

[0003] The condensing heat exchanger generally includes a shell (also called a condensing box), a housing is provided in the shell, and a condensing pipe assembly is provided in the housing. The smoke generated by the combustion of the gas enters the shell from the smoke inlet of the shell, exchanges heat with the condensing heat exchange assembly, and then flows out from the smoke outlet of the shell.

[0004] However, in the above-mentioned condensing heat exchanger, since the flow velocity of the flue gas in the shell is slow, the heat exchange efficiency of the condensing heat exchanger is low. Utility Model Content

[0005] One of the technical problems solved by the utility model is to provide a condensing heat exchanger, which can effectively solve the technical problem of low heat exchange efficiency of the condensing heat exchanger in the prior art.

[0006] The second technical problem solved by the present invention is to provide a gas water heater, which can effectively solve the technical problem of low heat exchange efficiency of the condensing heat exchanger of the gas water heater in the prior art.

[0007] The first technical problem mentioned above is solved by the following technical solution:

[0008] Condensing heat exchanger, including:

[0009] A shell, wherein a receiving cavity is arranged in the shell, a smoke inlet and a smoke exhaust port connected to the receiving cavity are arranged on the shell, the smoke exhaust port is located on the side of the shell, a guide plate is arranged in the receiving cavity, one side of the guide plate and the inner wall of the shell are surrounded to form a smoke inlet channel, the entrance of the smoke inlet channel is connected to the smoke inlet, and the flow area of ​​the smoke inlet channel gradually decreases along the flow direction of the smoke;

[0010] A condenser tube assembly is arranged in the shell, and the condenser tube assembly is located between the outlet of the smoke inlet channel and the smoke exhaust port.

[0011] The condensing heat exchanger described in the utility model has the following beneficial effects:

[0012] The condensing heat exchanger is provided with a guide plate in the accommodating cavity, and one side of the guide plate is surrounded by the inner wall of the shell to form a smoke inlet channel, the entrance of the smoke inlet channel is connected with the smoke inlet port, and the flow area of ​​the smoke inlet channel gradually decreases along the flow direction of the smoke. With such a configuration, when the smoke from the outside enters the smoke inlet channel, the smoke inlet channel has a structure in which the flow area gradually decreases from the smoke inlet port along the flow direction of the smoke, so that the smoke flow rate gradually increases, and when the smoke flows to the outlet of the smoke inlet channel, its flow rate reaches the maximum, so that the smoke can quickly flow through the condenser tube assembly and exchange heat with the condenser tube assembly; because the smoke flow rate is fast, more smoke can flow through the condenser tube assembly and exchange heat with the condenser tube assembly in the same time, thereby improving the heat exchange efficiency.

[0013] At the same time, the rapid flow of flue gas in the smoke inlet channel can also avoid the flue gas losing a lot of energy during the flow before reaching the condenser tube assembly, further ensuring the heat exchange efficiency of the condensing heat exchanger.

[0014] The smoke exhaust port is located on the side of the shell, so that the condensing heat exchanger can be suitable for gas water heaters installed outdoors. Compared with the upward setting of the smoke exhaust port, the smoke exhaust port located on the side of the shell can prevent falling rain and snow from falling directly into the shell, improve the waterproof performance of the product, and ensure the stable operation and normal use of the product.

[0015] In one embodiment, the housing comprises:

[0016] A shell body, wherein the housing cavity having openings at upper and lower ends is provided in the shell body, and the lower end opening of the shell body is the smoke inlet;

[0017] A cover body, the cover body is arranged to cover the upper end opening of the shell body;

[0018] The smoke exhaust port is arranged on a side surface of the shell body or on a side surface of the cover body.

[0019] In one of the embodiments, the condensing heat exchanger further includes a smoke hood assembly, wherein the smoke hood assembly is disposed on the side of the shell where the smoke exhaust port is disposed, and the smoke hood assembly includes a baffle disposed at an angle to the side where the smoke exhaust port is disposed, and projected in a direction perpendicular to the side, the baffle at least partially covers the smoke exhaust port.

[0020] In one embodiment, the angle is 40°-60°.

[0021] In one embodiment, the fume hood assembly comprises:

[0022] A smoke hood mounting plate is mounted on the side surface, and the baffle is arranged on the smoke hood mounting plate;

[0023] A smoke outlet plate is installed on the smoke hood mounting plate, and a smoke outlet nozzle formed by a flange is arranged on the smoke outlet plate. Both ends of the smoke outlet nozzle are opened and communicated with the smoke exhaust port. The baffle extends into the smoke outlet nozzle, and a sealing member is sleeved on the outer periphery of the smoke outlet nozzle.

[0024] In one of the embodiments, the other side surface of the guide plate and the inner wall of the shell are formed to form a partition cavity connected to the outlet of the smoke inlet channel, the condenser tube assembly is installed in the partition cavity, and the condensing heat exchanger also includes a drain pipe, which is located outside the accommodating cavity and the inlet of the drain pipe is connected to the partition cavity.

[0025] In one of the embodiments, a partition is further provided in the partition cavity, and the partition divides the partition cavity into a condenser tube assembly installation cavity and a smoke outlet channel. The condenser tube assembly is installed in the condenser tube assembly installation cavity, and the inlet of the condenser tube assembly installation cavity is connected with the outlet of the smoke inlet channel, and the outlet of the condenser tube assembly installation cavity is connected with the inlet of the smoke outlet channel, and the outlet of the smoke outlet channel is connected with the smoke exhaust port. The inlet of the smoke outlet channel and the smoke exhaust port are staggered in the vertical direction.

[0026] In one of the embodiments, the inner wall of the accommodating cavity is provided with a partition card slot which is engaged with the partition.

[0027] In one of the embodiments, a disturbance plate is provided in the installation cavity of the condenser assembly, one end of the disturbance plate is fixedly provided on the inner wall of the accommodating cavity, and the other end passes through the condenser assembly and forms a smoke hole between the condenser assembly and the guide plate. In the vertical direction, the smoke hole is offset from the inlet of the installation cavity of the condenser assembly and is offset from the outlet of the installation cavity of the condenser assembly.

[0028] The above second technical problem is solved by the following technical solution:

[0029] The gas water heater comprises a combustion chamber and a main heat exchanger, and also comprises the above-mentioned condensing heat exchanger, wherein the combustion chamber, the main heat exchanger and the accommodating chamber of the condensing heat exchanger are connected in sequence.

[0030] Compared with the background technology, the gas water heater of the utility model has the following beneficial effects:

[0031] The gas water heater includes the above-mentioned condensing heat exchanger, and a guide plate is arranged in the accommodating cavity of the condensing heat exchanger, and one side of the guide plate is surrounded by the inner wall of the shell to form a smoke inlet channel, and the entrance of the smoke inlet channel is connected with the smoke inlet port, and the flow area of ​​the smoke inlet channel gradually decreases along the flow direction of the smoke. In this way, when the smoke from the outside enters the smoke inlet channel, the smoke inlet channel has a structure in which the flow area gradually decreases from the smoke inlet port along the flow direction of the smoke, so that the smoke flow rate gradually increases, and when the smoke flows to the outlet of the smoke inlet channel, its flow rate reaches the maximum, so that the smoke can quickly flow through the condensing tube assembly and exchange heat with the condensing tube assembly; because the smoke flow speed is fast, more smoke can flow through the condensing tube assembly and exchange heat with the condensing tube assembly in the same time, thereby improving the heat exchange efficiency.

[0032] At the same time, the rapid flow of flue gas in the smoke inlet channel can also avoid the flue gas losing a lot of energy during the flow before reaching the condenser tube assembly, further ensuring the heat exchange efficiency of the condensing heat exchanger.

[0033] The smoke exhaust port is located on the side of the shell, so that the gas water heater can be installed outdoors. Compared with the upward setting of the smoke exhaust port, the smoke exhaust port located on the side of the shell can prevent falling rain and snow from falling directly into the shell, improve the waterproof performance of the product, and ensure the stable operation and normal use of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of the structure of a condensing heat exchanger provided in Embodiment 1 of the present utility model;

[0035] Figure 2 A schematic diagram of the exploded structure of the condensing heat exchanger provided in the first embodiment of the utility model;

[0036] Figure 3 A schematic cross-sectional structure diagram of a condensing heat exchanger provided in Embodiment 1 of the present utility model;

[0037] Figure 4 A schematic diagram of the structure of the housing body provided in the first embodiment of the utility model;

[0038] Figure 5 A schematic cross-sectional structure diagram of a housing body provided in Embodiment 1 of the present utility model;

[0039] Figure 6 This is a schematic diagram of the exploded structure of the cover provided in the first embodiment of the present utility model;

[0040] Figure 7 A schematic diagram of the cross-sectional structure of a cover body provided in Embodiment 1 of the present utility model;

[0041] Figure 8 This is a schematic diagram of the exploded structure of the smoke hood assembly provided in the first embodiment of the utility model;

[0042] Fig. 9 A schematic cross-sectional structure diagram of a smoke hood mounting plate provided in Embodiment 1 of the present utility model;

[0043] Fig.10 A schematic diagram of the flow direction of flue gas in a condensing heat exchanger provided in the second embodiment of the present utility model;

[0044] Fig.11 A schematic diagram of the flow direction of flue gas in a condensing heat exchanger provided in Embodiment 3 of the present utility model;

[0045] Fig.12 A schematic diagram of the flow direction of flue gas in a condensing heat exchanger provided in the fourth embodiment of the present utility model;

[0046] Fig.13 This is a schematic diagram of a water heater housing and a water heater body provided in Embodiment 5 of the present utility model when they are not installed in place;

[0047] Fig.14 A cross-sectional schematic diagram of a water heater housing and a water heater body provided in Embodiment 5 of the present utility model when they are installed in place;

[0048] Fig.15 This is a front schematic diagram of the water heater surface shell and the water heater body provided in the fifth embodiment of the utility model when they are installed in place.

[0049] Description of labels:

[0050] 10. Combustion chamber; 20. Main heat exchanger; 30. Surface shell;

[0051] 1. Shell; 11. Accommodating chamber; 111. Smoke inlet channel; 112. Partition chamber; 1121. Condenser assembly installation chamber; 1122. Smoke outlet channel; 113. Partition plate slot; 114. Disturbing plate slot; 12. Smoke inlet; 13. Smoke outlet; 14. Guide plate; 151. Partition plate; 152. Disturbing plate; 16. Cover body; 161. Cover body fixing frame;

[0052] 2. Condenser assembly;

[0053] 3. Drain pipe;

[0054] 4. Smoke hood assembly; 41. baffle; 42. smoke hood mounting plate; 43. smoke outlet plate; 431. smoke outlet nozzle; 44. sealing element; 45. sealing gasket. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0056] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "vertical", "horizontal", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0057] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0058] Embodiment 1

[0059] See also Figure 1-Figure 3 This embodiment provides a condensing heat exchanger, which includes a shell 1 and a condenser tube assembly 2.

[0060] A accommodating chamber 11 is provided in the shell 1, and a smoke inlet 12 and a smoke exhaust port 13 connected to the accommodating chamber 11 are provided on the shell 1. The smoke exhaust port 13 is located on the side of the shell 1. A guide plate 14 is provided in the accommodating chamber 11. One side of the guide plate 14 and the inner wall of the shell 1 are surrounded to form a smoke inlet channel 111. The entrance of the smoke inlet channel 111 is connected to the smoke inlet port 12. Along the flow direction of the smoke, the flow area of ​​the smoke inlet channel 111 gradually decreases.

[0061] The condenser tube assembly 2 is disposed in the housing 1 , and the condenser tube assembly 2 is located between the outlet of the smoke inlet channel 111 and the smoke exhaust port 13 .

[0062] The structure of the condenser tube assembly 2 and the installation of the condenser tube assembly 2 in the housing 1 belong to the prior art and will not be described in detail here.

[0063] The condensing heat exchanger provided in this embodiment has a guide plate 14 arranged in the accommodating cavity 11, and one side of the guide plate 14 is surrounded by the inner wall of the shell 1 to form a smoke inlet channel 111, and the entrance of the smoke inlet channel 111 is connected to the smoke inlet 12, and the flow area of ​​the smoke inlet channel 111 gradually decreases along the flow direction of the smoke. In this way, when the smoke from the outside enters the smoke inlet channel 111, since the smoke inlet channel 111 is a structure in which the flow area gradually decreases from the smoke inlet 12 along the flow direction of the smoke, the smoke flow rate gradually increases, and when the smoke flows to the outlet of the smoke inlet channel 111, its flow rate reaches the maximum, so that the smoke can quickly flow through the condensing tube assembly 2 and exchange heat with the condensing tube assembly 2; because the smoke flow speed is fast, more smoke can flow through the condensing tube assembly 2 and exchange heat with the condensing tube assembly 2 in the same time, thereby improving the heat exchange efficiency.

[0064] At the same time, the flue gas flows quickly through the smoke inlet channel 111, which can also prevent the flue gas from losing a lot of energy during the flow between the condenser tube components 2, further ensuring the heat exchange efficiency of the condensing heat exchanger.

[0065] The smoke exhaust port 13 is located on the side of the shell 1, so that the condensing heat exchanger can be suitable for gas water heaters installed outdoors. Compared with the upward setting of the smoke exhaust port 13, the smoke exhaust port 13 located on the side of the shell 1 can prevent falling rain and snow from falling directly into the shell 1, thereby improving the waterproof performance of the product and ensuring the stable operation and normal use of the product.

[0066] Preferably, in this embodiment, the guide plate 14 is curved, and the outlet flow area of ​​the smoke inlet channel 111 is much smaller than the inlet flow area of ​​the smoke inlet channel 111. The flow area of ​​the smoke inlet channel 111 gradually decreases from the smoke inlet 12 along the flow direction of the smoke, and the change rate of the flow area is not a constant value.

[0067] Specifically, the housing 1 includes a housing body and a cover 16 .

[0068] A receiving cavity 11 with openings at upper and lower ends is arranged in the shell body, and the lower end opening of the shell body is a smoke inlet 12 .

[0069] The cover 16 covers the upper opening of the housing body.

[0070] Optionally, the smoke exhaust port 13 is disposed on a side surface of the housing body or on a side surface of the cover body 16 .

[0071] Specifically, see Figure 3-Figure 5In this embodiment, the smoke exhaust port 13 is arranged on the side of the shell body. More specifically, the smoke exhaust port 13 is formed by opening the side of the shell body in the length direction. The smoke exhaust port 13 is a narrow and long opening extending in the horizontal direction, which can ensure the smooth exhaust of smoke on the one hand, and prevent rain and snow from entering the smoke exhaust port 13 as much as possible on the other hand.

[0072] Specifically, in order to facilitate the rapid discharge of condensed water in the housing 1, see Figure 3-Figure 5 The other side of the guide plate 14 and the inner wall of the shell 1 are arranged to form a partition chamber 112 connected to the outlet of the smoke inlet channel 111. The condensing pipe assembly 2 is installed in the partition chamber 112. The condensing heat exchanger also includes a drain pipe 3, which is located outside the accommodating chamber 11 and the inlet of the drain pipe 3 is connected to the partition chamber 112.

[0073] The inlet of the drain pipe 3 is connected to the partition chamber 112. In this configuration, during the heat exchange process of the condenser tube assembly 2, condensed water condensed on the condenser tube assembly 2 drops into the partition chamber 112 and is directly discharged through the drain pipe.

[0074] The guide plate 14 is curved, and the lower end of the guide plate 14 is located at the lowest point of the partition chamber 112. The condensed water dripping from the condenser pipe assembly 2 first falls on the guide plate 14, and then flows along the curved surface of the guide plate 14 to the lowest point of the partition chamber 112. This arrangement facilitates the rapid collection of condensed water. It can be understood that the inlet of the drain pipe 3 is located at the lowest point of the partition chamber 112, which facilitates the rapid discharge of the collected condensed water.

[0075] In order to further increase the wind and water resistance of the condensing heat exchanger, see Figure 3 In this embodiment, a partition 151 is further provided in the partition chamber 112, and the partition 151 divides the partition chamber 112 into a condenser tube assembly installation chamber 1121 and a smoke outlet channel 1122. The condenser tube assembly 2 is installed in the condenser tube assembly installation chamber 1121, and the inlet of the condenser tube assembly installation chamber 1121 is connected to the outlet of the smoke inlet channel 111, and the outlet of the condenser tube assembly installation chamber 1121 is connected to the inlet of the smoke outlet channel 1122, and the outlet of the smoke outlet channel 1122 is connected to the smoke exhaust port 13, and the inlet of the smoke outlet channel 1122 and the smoke exhaust port 13 are staggered in the vertical direction.

[0076] The partition 151 separates the condenser tube assembly 2 from the smoke outlet 13, and the entrance of the smoke outlet channel 1122 is staggered with the smoke outlet 13 in the vertical direction. Even if a small amount of wind and rain enters the smoke outlet 13, the wind and rain will first contact the partition 151, and will not contact the condenser tube assembly 2; the rainwater entering the smoke outlet channel 1122 will eventually be discharged through the drain pipe 3; the wind entering the smoke outlet channel 1122 is blocked by the partition 151. That is, the partition 151 can separate the entering wind and rain from the condenser tube assembly 2.

[0077] Optionally, the partition 151 is spaced apart from the smoke exhaust port 13; or

[0078] The partition plate 151 and the smoke exhaust port 13 are arranged horizontally with a spacing therebetween and vertically staggered.

[0079] Specifically, in this embodiment, see Figure 3 The partition 151 is spaced apart from the smoke outlet 13, and the lower end of the partition 151 is lower than the lowest point of the smoke outlet 13. When a small amount of wind, rain or snow from the outside enters from the smoke outlet 13, the wind, rain or snow entering laterally will be blocked by the partition 151 in the smoke outlet channel 1122, and finally discharged through the drain pipe 3.

[0080] Specifically, in this embodiment, the partition 151 is disposed on the cover 16 and extends downward into the accommodating cavity 11 to be spaced apart from the smoke outlet 13. The outlet of the condenser assembly installation cavity 1121 is formed between the lower end of the partition 151 and the guide plate 14.

[0081] Further, see Figure 5 In order to ensure the accuracy of the installation position of the partition 151, the inner wall of the accommodating chamber 11 is provided with a partition slot 113 that is engaged with the partition 151. Specifically, there are two partition slots 113, and the two partition slots 113 are engaged with the two ends of the partition 151 in a one-to-one correspondence. The provision of the partition slots 113 can also prevent the partition 151 from being deformed by the impact of fast-flowing smoke.

[0082] Specifically, see Figure 6 and Figure 7 The cover body 16 is provided with a cover body fixing frame 161, and the cover body fixing frame 161 is used for installation and fixing with the bottom shell of the gas water heater.

[0083] Specifically, a flange is provided on the circumference of the upper end opening of the shell body, and a flange is also provided on the circumference of the cover body 16, so as to realize the connection of the cover body 16 to the upper end opening of the shell body.

[0084] A flange is also provided around the lower opening of the shell body to facilitate the connection between the shell body and the main heat exchanger of the gas water heater.

[0085] See also Figure 8 and Fig. 9 In order to further prevent wind and rain from entering the smoke exhaust port 13 and to quickly discharge the smoke, in this embodiment, the condensing heat exchanger also includes a smoke hood assembly 4, which is arranged on the side of the shell 1 where the smoke exhaust port 13 is provided. The smoke hood assembly 4 includes a baffle 41 arranged at an angle to the side where the smoke exhaust port 13 is provided. When projected in a direction perpendicular to the side, the baffle 41 at least partially covers the smoke exhaust port 13.

[0086] The baffle 41 is arranged at an angle to the side where the smoke exhaust port 13 is provided, and is projected in a direction perpendicular to the side. The baffle 41 at least partially covers the smoke exhaust port 13. With this arrangement, the baffle 41 can block most of the wind and rain from being blown into the smoke exhaust port 13, further preventing wind and rain from entering the smoke exhaust port 13, thereby improving the windproof and waterproof capabilities of the product and ensuring the normal use of the product.

[0087] Preferably, in this embodiment, the angle is 40°-60°. Fig. 9 α represents the inclination angle of the baffle 41 relative to the side of the housing 1, and α is 40°-60°.

[0088] Exemplarily, when the gas water heater is installed in place, α represents the angle between the baffle 41 and the vertical direction.

[0089] More specifically, the smoke hood assembly 4 includes a smoke hood mounting plate 42 and a smoke outlet plate 43 .

[0090] The smoke hood mounting plate 42 is mounted on the side, and the baffle 41 is disposed on the smoke hood mounting plate 42 .

[0091] The smoke outlet plate 43 is mounted on the smoke hood mounting plate 42. The smoke outlet plate 43 is provided with a smoke outlet nozzle 431 formed by a flange. Both ends of the smoke outlet nozzle 431 are open and communicated with the smoke exhaust port 13. The baffle plate 41 extends into the smoke outlet nozzle 431. A seal 44 is sleeved on the outer periphery of the smoke outlet nozzle 431. When the condensing heat exchanger is assembled with the face shell of the gas water heater, the seal 44 can abut against the circumference of the opening on the face shell of the gas water heater to prevent external rainwater from entering the gas water heater through the gap between the seal 44 and the face shell of the gas water heater, thereby ensuring the windproof and waterproof performance of the gas water heater.

[0092] Specifically, the sealing member 44 is an elastic sealing ring, and its material may be rubber or silicone.

[0093] Furthermore, a sealing gasket 45 is provided between the smoke hood mounting plate 42 and the smoke outlet plate 43. When the smoke hood assembly 4 is actually assembled, the sealing member 44 is sleeved on the outer periphery of the smoke outlet nozzle 431; then the smoke hood mounting plate 42, the sealing gasket 45 and the smoke outlet plate 43 are stacked in sequence, and the connecting member passes through the smoke outlet plate 43, the sealing gasket 45 and the smoke hood mounting plate 42 in sequence and is locked on the side of the housing 1.

[0094] For example, see Figure 3 , Figure 3The arrows in the figure indicate the flow direction of the flue gas. In this embodiment, when the condensing heat exchanger is working, the flue gas enters the smoke inlet channel 111 from the smoke inlet port 12 at the lower end of the shell body. As the flow cross-sectional area of ​​the smoke inlet channel 111 gradually decreases, the flow velocity of the flue gas in the smoke inlet channel 111 gradually increases, and enters the condenser tube assembly installation cavity 1121 from the outlet of the smoke inlet channel 111; the flue gas entering the condenser tube assembly installation cavity 1121 exchanges heat with the condenser tube assembly 2; the outlet of the condenser tube assembly installation cavity 1121 is formed between the lower end of the partition 151 and the guide plate 14, and the flow direction of the flue gas in the condenser tube assembly installation cavity 1121 is from top to bottom; the flue gas that has completed the heat exchange flows out from the outlet of the smoke inlet channel 111 and flows upward, and is finally discharged from the side smoke exhaust port 13 and the smoke outlet 431.

[0095] For example, see Figure 3 In windy and rainy weather, part of the wind and rain will be blocked by the inclined baffle 41 and cannot pass through the smoke outlet 13. Even if a small part of the wind and rain passes through the smoke outlet 13 from the gap at the lower end of the baffle 41, due to the setting of the partition 151, the wind and rain entering the accommodating chamber 11 cannot directly contact the condensation pipe assembly 2. The entering rainwater will flow along the partition 151 to the lowest point of the partition chamber 112 and finally be discharged through the drain pipe 3.

[0096] Embodiment 2

[0097] See also Fig.10 , this embodiment provides a condensing heat exchanger, wherein the components identical or corresponding to those in the first embodiment are denoted by the corresponding figure marks in the first embodiment. For the sake of simplicity, only the differences between the second embodiment and the first embodiment are described. The difference lies in that the installation structure of the partition 151 is different from that in the first embodiment, and a disturbance plate 152 is further provided in the installation cavity 1121 of the condenser tube assembly. One end of the disturbance plate 152 is fixedly provided on the inner wall of the accommodating cavity 11, and the other end passes through the condenser tube assembly 2 and forms a smoke hole with the guide plate 14. Along the second direction, the smoke hole is offset from the inlet of the installation cavity 1121 of the condenser tube assembly and is offset from the outlet of the installation cavity 1121 of the condenser tube assembly.

[0098] It should be noted that the condenser tube assembly 2 includes a plurality of tube bodies arranged at intervals, there are gaps between adjacent tube bodies, and the disturbance plates 152 are arranged through these gaps.

[0099] The tube bodies of the condenser tube assembly 2 are arranged on both sides of the disturbance plate 152 .

[0100] The setting of the disturbance plate 152 can change the flow trajectory of the flue gas entering the condenser tube assembly installation cavity 1121.

[0101] Specifically, in this embodiment, the upper end of the disturbance plate 152 is fixedly arranged on the lower surface of the cover body 16, and the lower end extends to the condenser assembly installation cavity 1121, and a smoke hole is formed between the lower end of the disturbance plate 152 and the guide plate 14. Further, in order to ensure the stability of the disturbance plate 152, the inner wall of the accommodating cavity 11 is provided with a disturbance plate slot 114 that is engaged with the disturbance plate 152. When the cover body 16 is installed on the shell body, the disturbance plate 152 is first installed on the cover body 16.

[0102] In this embodiment, the partition 151 is inserted in the accommodating cavity 11, the upper end of the partition 151 is a free end, and the lower end abuts against the guide plate 14. The upper end of the partition 151 and the lower surface of the cover 16 form an outlet of the condenser assembly installation cavity 1121.

[0103] Specifically, the inner wall of the accommodating cavity 11 is provided with a partition slot 113 which is engaged with the partition 151. The lower end of the partition slot 113 extends to the guide plate 14; when the partition 151 is installed in place, the cover body 16 is installed.

[0104] In this embodiment, a partition plate 151 and a disturbance plate 152 are disposed in the accommodating chamber 11 .

[0105] For example, see Fig.10 , Fig.10 The arrows in the figure indicate the flow direction of the flue gas. In this embodiment, when the condensing heat exchanger is working, the flue gas enters the smoke inlet channel 111 from the smoke inlet port 12 at the lower end of the shell body. As the flow cross-sectional area of ​​the smoke inlet channel 111 gradually decreases, the flow velocity of the smoke in the smoke inlet channel 111 gradually increases, and the smoke enters the condenser tube assembly installation cavity 1121 from the outlet of the smoke inlet channel 111.

[0106] The flue gas entering the condenser tube assembly installation cavity 1121 exchanges heat with the condenser tube assembly 2; in the condenser tube assembly installation cavity 1121, the flow path of the flue gas is: first flowing from top to bottom to the smoke hole, and then flowing from the smoke hole from bottom to top to the outlet of the condenser tube assembly installation cavity 1121.

[0107] An outlet of the condenser assembly installation cavity 1121 is formed between the upper end of the partition 151 and the cover body 16 . The smoke at the outlet of the condenser assembly installation cavity 1121 flows from top to bottom to the smoke exhaust port 13 and is discharged through the smoke outlet nozzle 431 .

[0108] Embodiment 3

[0109] See also Fig.11, this embodiment provides a condensing heat exchanger, wherein the components identical or corresponding to those in the first embodiment are marked with the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences between the third embodiment and the first embodiment are described, and the difference is that in this embodiment, a disturbance plate 152 is provided in the accommodating chamber 11 and no partition plate 151 is provided, and the smoke exhaust port 13 is provided on the side of the cover body 16. Correspondingly, the smoke hood assembly 4 is also provided on the side of the cover body 16.

[0110] A disturbance plate 152 is arranged in the condenser assembly installation cavity 1121, one end of the disturbance plate 152 is fixedly arranged on the inner wall of the accommodating cavity 11, and the other end passes through the condenser assembly 2 and forms a smoke hole between the condenser assembly 2 and the guide plate 14. Along the second direction, the smoke hole is offset from the entrance of the condenser assembly installation cavity 1121 and is offset from the exit of the condenser assembly installation cavity 1121.

[0111] More specifically, the cover body 16 is not a plate-shaped structure, but is provided with a cavity with an open lower end therein, and one end of the disturbance plate 152 is fixedly disposed on the inner side wall of the cavity of the cover body 16 .

[0112] It should be noted that the condenser tube assembly 2 includes a plurality of tube bodies arranged at intervals, there are gaps between adjacent tube bodies, and the disturbance plates 152 are arranged through these gaps.

[0113] The tube bodies of the condenser tube assembly 2 are arranged on both sides of the disturbance plate 152 .

[0114] In this embodiment, the upper end of the disturbance plate 152 is arranged on the inner side of the cover body 16, and the lower end extends to the condenser assembly installation cavity 1121, and a smoke hole is formed between the lower end of the disturbance plate 152 and the guide plate 14. Optionally, in order to ensure the stability of the disturbance plate 152, the inner wall of the accommodating cavity 11 is provided with a disturbance plate slot that is engaged with the disturbance plate 152.

[0115] For example, see Fig.11 , Fig.11 The arrows in the figure indicate the flow direction of the flue gas. In this embodiment, when the condensing heat exchanger is working, the flue gas enters the smoke inlet channel 111 from the smoke inlet port 12 at the lower end of the shell body. As the flow cross-sectional area of ​​the smoke inlet channel 111 gradually decreases, the flow velocity of the smoke in the smoke inlet channel 111 gradually increases, and the smoke gas enters the installation cavity 1121 of the condensing tube assembly from the outlet of the smoke inlet channel 111.

[0116] The flue gas entering the condenser tube assembly installation cavity 1121 exchanges heat with the condenser tube assembly 2; in the condenser tube assembly installation cavity 1121, the flow path of the flue gas is: first flowing from top to bottom to the smoke hole, and then flowing from the smoke hole from bottom to top to the outlet of the condenser tube assembly installation cavity 1121.

[0117] The connection between the cavity of the cover body 16 and the condenser assembly installation cavity 1121 is the outlet of the condenser assembly installation cavity 1121. The smoke at the outlet of the condenser assembly installation cavity 1121 flows horizontally to the smoke exhaust port 13 and is discharged through the smoke outlet nozzle 431.

[0118] Embodiment 4

[0119] See also Fig.12 This embodiment provides a condensing heat exchanger, wherein the components identical or corresponding to those in the first embodiment are marked with the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the difference between the fourth embodiment and the first embodiment is described, and the difference is that in this embodiment, the smoke exhaust port 13 is arranged on the side of the cover body 16. Correspondingly, the smoke hood assembly 4 is also arranged on the side of the cover body 16.

[0120] More specifically, the cover body 16 is not a plate-shaped structure, but is provided with a cavity with an open lower end.

[0121] One end of the partition 151 is arranged on the inner side surface of the cavity of the cover body 16, and the partition 151 includes a horizontal plate and a vertical plate. The horizontal plate is spaced relative to the lower surface of the cover body 16, and the horizontal plate, the vertical plate and the guide plate 14 are arranged to form a condenser tube assembly installation cavity 1121, and the surface of the vertical plate located outside the condenser tube assembly installation cavity 1121 and the inner wall of the accommodating cavity are arranged to form a smoke outlet channel 1122.

[0122] For example, see Fig.12 , Fig.12 The arrows in the figure indicate the flow direction of the flue gas. When the condensing heat exchanger is working, the flue gas enters the smoke inlet channel 111 from the smoke inlet port 12 at the lower end of the shell body. As the flow cross-sectional area of ​​the smoke inlet channel 111 gradually decreases, the flow velocity of the flue gas in the smoke inlet channel 111 gradually increases, and the flue gas enters the condensing tube assembly installation cavity 1121 from the outlet of the smoke inlet channel 111.

[0123] The flue gas entering into the condenser tube assembly installation cavity 1121 exchanges heat with the condenser tube assembly 2 ; in the condenser tube assembly installation cavity 1121 , the flow path of the flue gas is: flowing from top to bottom to the smoke outlet channel 1122 .

[0124] In the smoke outlet channel 1122 , smoke flows from bottom to top between the horizontal plate and the lower surface of the cover body 16 , and finally flows horizontally along the cavity of the cover body 16 to the smoke outlet 13 , and is discharged through the smoke outlet nozzle 431 .

[0125] Embodiment 5

[0126] See also Figure 13-Figure 15 This embodiment provides a gas water heater, which includes a combustion chamber 10 and a main heat exchanger 20, and also includes a condensing heat exchanger of any one of embodiments 1 to 4.

[0127] The combustion chamber 10, the main heat exchanger 20 and the accommodating chamber 11 of the condensing heat exchanger are connected in sequence.

[0128] The gas water heater provided in this embodiment includes the above-mentioned condensing heat exchanger.

[0129] The condensing heat exchanger is provided with a guide plate 14 in the accommodating chamber 11. One side of the guide plate 14 is surrounded by the inner wall of the shell 1 to form a smoke inlet channel 111. The entrance of the smoke inlet channel 111 is connected to the smoke inlet port 12. Along the flow direction of the smoke, the flow area of ​​the smoke inlet channel 111 gradually decreases. In this way, when the smoke from the outside enters the smoke inlet channel 111, the smoke inlet channel 111 is a structure in which the flow area gradually decreases from the smoke inlet port 12 along the flow direction of the smoke, so that the smoke flow rate gradually increases. When the smoke flows to the outlet of the smoke inlet channel 111, its flow rate reaches the maximum, so that the smoke can quickly flow through the condensing tube assembly 2 and exchange heat with the condensing tube assembly 2; because the smoke flow speed is fast, more smoke can flow through the condensing tube assembly 2 and exchange heat with the condensing tube assembly 2 in the same time, thereby improving the heat exchange efficiency.

[0130] At the same time, the rapid flow of flue gas through the smoke inlet channel 111 can also prevent the flue gas from losing a lot of energy during the flow before reaching the condenser tube assembly 2, further ensuring the heat exchange efficiency of the condensing heat exchanger.

[0131] The smoke exhaust port 13 is located on the side of the shell 1, so that the gas water heater can be installed outdoors. Compared with the smoke exhaust port 13 being set upward, the smoke exhaust port 13 located on the side of the shell 1 can prevent falling rain and snow from falling directly into the shell 1, ensuring the stable operation and normal use of the product.

[0132] Specifically, in this embodiment, a burner is disposed in the combustion chamber 10. The burner generates flue gas during combustion, and the gas flows through the main heat exchanger 20 and the condensing heat exchanger in sequence.

[0133] Furthermore, in this embodiment, the gas water heater further includes a surface shell 30 , and an opening corresponding to the smoke exhaust port 13 is provided on the surface shell 30 .

[0134] When the condensing heat exchanger is assembled with the face shell 30 of the gas water heater, the seal 44 can be in circumferential contact with the opening on the face shell 30 of the gas water heater to prevent external rainwater from entering the interior of the gas water heater through the gap between the seal 44 and the face shell of the gas water heater, thereby ensuring the waterproof performance of the gas water heater.

[0135] The gas water heater provided in this embodiment has good waterproof and windproof performance.

[0136] For example, see Fig.14 The gas water heater includes the condensing heat exchanger of the first embodiment or the second embodiment, Fig.14 The middle arrow points to the flow of wind and rain from the outside; the wind and rain from the outside first enter the smoke outlet 431, and part of the wind and rain will be blocked outside by the baffle 41; the other part of the wind and rain will enter the partition chamber 112, be blocked by the partition 151, and will be discharged from the drain pipe 3.

[0137] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0138] The specific contents of the above specific implementations only express several implementations of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. Condensing heat exchanger, characterized in that: include: A shell (1), wherein a receiving chamber (11) is arranged in the shell (1), a smoke inlet (12) and a smoke exhaust port (13) which are in communication with the receiving chamber (11) are arranged on the shell (1), the smoke exhaust port (13) is located on a side of the shell (1), a guide plate (14) is arranged in the receiving chamber (11), one side of the guide plate (14) and an inner wall of the shell (1) are arranged to form a smoke inlet channel (111), an inlet of the smoke inlet channel (111) is in communication with the smoke inlet port (12), and a flow area of ​​the smoke inlet channel (111) gradually decreases along a flow direction of smoke; A condenser tube assembly (2) is arranged in the shell (1), and the condenser tube assembly (2) is located between the outlet of the smoke inlet channel (111) and the smoke exhaust port (13).

2. The condensing heat exchanger according to claim 1, characterized in that: The housing (1) comprises: A shell body, wherein the housing cavity (11) having openings at upper and lower ends is arranged in the shell body, and the lower end opening of the shell body is the smoke inlet (12); A cover body (16), the cover body (16) is arranged to cover the upper end opening of the shell body; The smoke exhaust port (13) is arranged on a side surface of the shell body or on a side surface of the cover body (16).

3. The condensing heat exchanger according to claim 1, characterized in that: The condensing heat exchanger further comprises a smoke hood assembly (4), wherein the smoke hood assembly (4) is arranged on the side of the shell (1) on which the smoke exhaust port (13) is arranged, and the smoke hood assembly (4) comprises a baffle (41) arranged at an angle with the side on which the smoke exhaust port (13) is arranged, and when projected in a direction perpendicular to the side, the baffle (41) at least partially covers the smoke exhaust port (13).

4. The condensing heat exchanger according to claim 3, characterized in that: The angle is 40°-60°.

5. The condensing heat exchanger according to claim 3, characterized in that: The smoke hood assembly (4) comprises: A smoke hood mounting plate (42) is mounted on the side surface, and the baffle (41) is arranged on the smoke hood mounting plate (42); A smoke outlet plate (43) is mounted on the smoke hood mounting plate (42); a smoke outlet nozzle (431) formed by a flange is arranged on the smoke outlet plate (43); both ends of the smoke outlet nozzle (431) are open and communicated with the smoke exhaust port (13); the baffle (41) extends into the smoke outlet nozzle (431); and a sealing member (44) is sleeved on the outer periphery of the smoke outlet nozzle (431).

6. The condensing heat exchanger according to claim 1, characterized in that: The other side surface of the guide plate (14) and the inner wall of the shell (1) are arranged to form a partition chamber (112) connected to the outlet of the smoke inlet channel (111); the condenser pipe assembly (2) is installed in the partition chamber (112); the condensing heat exchanger also includes a drain pipe (3); the drain pipe (3) is located outside the accommodating chamber (11) and the inlet of the drain pipe (3) is connected to the partition chamber (112).

7. The condensing heat exchanger according to claim 6, characterized in that: A partition (151) is also provided in the partition chamber (112), and the partition (151) divides the partition chamber (112) into a condenser tube assembly installation chamber (1121) and a smoke outlet channel (1122). The condenser tube assembly (2) is installed in the condenser tube assembly installation chamber (1121), and the inlet of the condenser tube assembly installation chamber (1121) is connected to the outlet of the smoke inlet channel (111), and the outlet of the condenser tube assembly installation chamber (1121) is connected to the inlet of the smoke outlet channel (1122), and the outlet of the smoke outlet channel (1122) is connected to the smoke exhaust port (13). The inlet of the smoke outlet channel (1122) and the smoke exhaust port (13) are staggered in the vertical direction.

8. The condensing heat exchanger according to claim 7, characterized in that: The inner wall of the accommodating cavity (11) is provided with a partition plate clamping groove (113) which is clamped with the partition plate (151).

9. The condensing heat exchanger according to claim 7, characterized in that: A disturbance plate (152) is arranged in the installation cavity (1121) of the condenser assembly, one end of the disturbance plate (152) is fixedly arranged on the inner wall of the accommodating cavity (11), and the other end passes through the condenser assembly (2) and forms a smoke hole between the condenser assembly and the guide plate (14). In the vertical direction, the smoke hole is offset from the inlet of the installation cavity (1121) of the condenser assembly and is offset from the outlet of the installation cavity (1121) of the condenser assembly.

10. A gas water heater, comprising a combustion chamber (10) and a main heat exchanger (20), characterized in that: It also comprises a condensing heat exchanger as claimed in any one of claims 1 to 9, wherein the combustion chamber (10), the main heat exchanger (20) and the accommodating chamber (11) of the condensing heat exchanger are sequentially connected.

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