Condensation heat exchanger and condensation type gas water heater

Abstract

The utility model discloses a condensation heat exchanger and a condensation type gas water heater, the condensation heat exchanger comprises a box body provided with a smoke inlet and a smoke outlet, a baffle plate is arranged in the box body, the baffle plate divides an inner cavity of the box body into a smoke inlet flow channel communicated with the smoke inlet and a smoke outlet flow channel communicated with the smoke outlet, and the smoke inlet flow channel is communicated with the smoke outlet. A water collecting cavity for communicating the smoke inlet flow channel with the smoke exhaust flow channel is also arranged in the box body; the condensation heat exchange pipe is arranged in the smoke inlet flow channel and is separated from the smoke exhaust flow channel through the baffle plate, and the water collecting cavity is used for collecting condensate water generated by the condensation heat exchange pipe; and the atomization module is arranged in the box body, and the atomization module is used for atomizing the condensate water in the water collecting cavity. According to the technical scheme, condensate water can be drained without being externally connected with a drain pipe, and when the condensate water pipe is applied to the condensation type gas water heater, the installation convenience of the condensation type gas water heater and the appearance integrity of the whole machine can be improved.

Description

Technical Field

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

[0002] Under the background of energy conservation and emission reduction, improving the energy efficiency of gas water heaters has become a trend in the industry. Traditional condensing gas water heaters generally set up condensation heat exchangers to make full use of the latent heat of vaporization of flue gas to achieve high energy efficiency. However, a large amount of condensed water will be generated during the process of using the latent heat of vaporization of flue gas by the condensation heat exchanger. Therefore, during installation, an additional drain pipe usually needs to be connected externally to drain the condensed water into the sewer or pool, making the installation of the condensing gas water heater inconvenient, and the externally connected drain pipe will also affect the overall appearance integrity of the machine. Content of the Utility Model

[0003] The main purpose of the utility model is to propose a condensation heat exchanger, aiming to discharge condensed water without externally connecting a drain pipe. When applied to a condensing gas water heater, it can improve the installation convenience of the condensing gas water heater and the overall appearance integrity of the machine.

[0004] To achieve the above purpose, the condensation heat exchanger proposed by the utility model includes:

[0005] A box body, provided with a smoke inlet and a smoke outlet. A baffle is arranged inside the box body, and the baffle divides the inner cavity of the box body into a smoke inlet flow channel communicated with the smoke inlet and a smoke outlet flow channel communicated with the smoke outlet. A water collecting cavity for communicating the smoke inlet flow channel with the smoke outlet flow channel is also arranged inside the box body;

[0006] Condensation heat exchange tubes, arranged in the smoke inlet flow channel and separated from the smoke outlet flow channel by the baffle. The water collecting cavity is used for collecting the condensed water generated by the condensation heat exchange tubes; and

[0007] An atomization module, arranged in the box body, and the atomization module is used for atomizing the condensed water in the water collecting cavity.

[0008] In one embodiment, the atomization module is oppositely arranged with respect to the inlet end of the smoke outlet flow channel.

[0009] In one embodiment, the smoke inlet flow channel and the smoke outlet flow channel are respectively arranged on both sides of the baffle along a first direction, the water collecting cavity is located below the baffle, the top of the water collecting cavity is open, and the smoke inlet flow channel and the smoke outlet flow channel are respectively communicated with the open top of the water collecting cavity. Wherein, the first direction intersects with the height direction of the box body.

[0010] In one embodiment, a diversion surface is provided at the bottom end of the smoke inlet channel inside the box body. The diversion surface is located on the side of the smoke inlet channel away from the baffle plate, and the diversion surface extends obliquely downward and toward the side close to the smoke exhaust channel.

[0011] In one embodiment, a partition is provided in the water collection cavity. The partition divides the water collection cavity into a first cavity and a second cavity arranged side by side along the first direction. The first cavity is located below the smoke inlet channel, and the second cavity is located on the side of the first cavity close to the smoke exhaust channel. The partition is provided with a water passing opening for communicating the first cavity and the second cavity. The atomization module is correspondingly arranged in the second cavity for atomizing the condensed water in the second cavity.

[0012] In one embodiment, an installation opening is provided on the bottom wall of the second cavity. The atomization module includes a base and an atomizing member arranged on the top of the base. The base is fixed to the bottom side of the box body, and the atomizing member is placed into the second cavity from the installation opening.

[0013] In one embodiment, a drain opening communicating with the water collection cavity is provided on the bottom wall of the box body. The drain opening is used to be opened or closed under the control of a drain valve.

[0014] In one embodiment, the box body includes a first side wall and a second side wall oppositely arranged along the first direction. The smoke inlet is provided on the first side wall, and the smoke exhaust port is provided on the top wall of the box body. The baffle plate includes a first plate body oppositely arranged with the smoke exhaust port, a second plate body oppositely arranged with the smoke inlet, and an intermediate plate body connected between the first plate body and the second plate body. The intermediate plate body is arranged as an arc-shaped plate arched away from the smoke inlet side.

[0015] In one embodiment, the box body further includes a third side wall and a fourth side wall oppositely arranged along the second direction. The condensation heat exchange tubes are arranged to extend circuitously between the third side wall and the fourth side wall and are arranged in multiple rows along the height direction of the box body. The third side wall is provided with a water inlet interface communicating with the water inlet end of the condensation heat exchange tubes and a water outlet interface communicating with the water outlet end of the condensation heat exchange tubes. Among them, the first direction, the second direction, and the height direction of the box body intersect pairwise.

[0016] In one embodiment, the condensation heat exchanger further includes a liquid level detection device for detecting the liquid level in the water collection chamber. The atomization module is configured to be turned on when the liquid level in the water collection chamber reaches a first preset liquid level and turned off when the liquid level in the water collection chamber reaches a second preset liquid level. Wherein, the first preset liquid level is higher than the second preset liquid level, and the second preset liquid level is higher than the atomization module.

[0017] The present utility model further provides a condensing gas water heater, comprising:

[0018] A water heater body; and

[0019] The condensation heat exchanger as described above, wherein the smoke inlet of the condensation heat exchanger is communicated with the flue of the water heater body.

[0020] In one embodiment, the water heater body includes a burner, a main heat exchanger, and a blower sequentially arranged from bottom to top. The burner is communicated with the smoke inlet end of the flue. The main heat exchanger includes main heat exchange tubes at least partially arranged in the flue. The air inlet of the blower is communicated with the smoke outlet end of the flue, and the air outlet of the blower is communicated with the smoke inlet. The water outlet end of the condensation heat exchange tube is communicated with the water inlet end of the main heat exchange tube.

[0021] In the technical solution of the present utility model, flue gas is conveyed to the smoke inlet channel through the smoke inlet to exchange heat with the condensation heat exchange tube to heat the water in the condensation heat exchange tube. The condensed water generated on the surface of the condensation heat exchange tube is collected in the water collection chamber. The water in the water collection chamber is atomized by the atomization module and then flows with the flue gas to the smoke exhaust channel and is finally discharged from the smoke outlet. And the condensation heat exchange tube is located in the smoke inlet channel and separated from the smoke exhaust channel by a baffle plate, that is, the condensation heat exchange tube will not cross the baffle plate to occupy the internal space of the smoke exhaust channel. In this way, the inside of the smoke exhaust channel is unobstructed, which can reduce the resistance of the atomized condensed water discharged with the flue gas and avoid the atomized condensed water from being blocked by the condensation heat exchange tube during the discharge process and re-condensing into condensed water, thereby improving the atomization effect of the condensed water and enhancing the discharge efficiency of the condensed water. This technical solution can achieve the efficient discharge of condensed water without an external drain pipe. When applied to a condensing gas water heater, it can improve the installation convenience and the overall appearance integrity of the condensing gas water heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0023] Figure 1 This is a schematic structural diagram of an embodiment of the condensing heat exchanger of the present utility model;

[0024] Figure 2 is Figure 1 a schematic cross-sectional structural diagram of the condensing heat exchanger in

[0025] Figure 3 This is a schematic structural diagram of an embodiment of the condensing gas water heater of the present utility model;

[0026] Figure 4 This is a schematic structural diagram of another embodiment of the condensing gas water heater of the present utility model;

[0027] Figure 5 is Figure 4 a schematic diagram of the flue gas flow when the condensing gas water heater in

[0028] Explanation of the reference numerals in the drawings:

[0029] Reference numeral Name Reference numeral Name 100 Condensing heat exchanger 13 Partition board 10 Cabinet 131 Water inlet 101 Smoke inlet 14 Water box 102 Smoke outlet 10a First side wall 103 Smoke inlet channel 10b Second side wall 104 Smoke outlet channel 10c Third side wall 105 Water collecting chamber 10d Fourth side wall 105a First cavity 20 Condensing heat exchange tube 105b Second cavity 30 Atomization module 106 Drainage port 41 First detection element 107 Water inlet interface 42 Second detection element 108 Water outlet interface 200 Water heater body 11 Baffle plate 210 Burner 111 First plate 220 Main heat exchanger 112 Second plate 230 Fan 113 Intermediate plate 300 Housing 12 Deflecting surface

[0030] The realization, functional features and advantages of the object of the present utility model will be further described in conjunction with the embodiments with reference to the drawings. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0032] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0034] Traditional condensing gas water heaters generally include a main heat exchanger (i.e., a primary heat exchanger) and a condensing heat exchanger (i.e., a secondary heat exchanger) to achieve two-stage heat exchange, so as to make full use of the latent heat of vaporization of flue gas to achieve high energy efficiency. However, a large amount of condensed water is generated during the process of the condensing heat exchanger using the latent heat of vaporization of flue gas. Therefore, when installing a traditional condensing gas water heater, it is usually necessary to externally connect a drain pipe to drain the condensed water into the sewer or pool. In this way, the installation of the condensing gas water heater is inconvenient, and the externally connected drain pipe will also affect the overall appearance integrity of the whole machine and the user experience.

[0035] In related technologies, although there are also some condensing heat exchangers that discharge the condensed water after atomization treatment along with the flue gas. However, the internal flow channel structure of such condensing heat exchangers is usually not reasonably designed. For example, the condensing heat exchange tubes simultaneously occupy the flue gas inlet channel and the flue gas outlet channel, resulting in a large resistance for the atomized condensed water to be discharged along with the flue gas, and the atomized condensed water may condense again to generate condensed water after encountering obstacles, resulting in a low discharge efficiency of the condensed water.

[0036] Based on this, the present utility model proposes a condensing heat exchanger 100, which discharges the condensed water after atomization treatment along with the flue gas, and can realize the discharge of the condensed water without externally connecting a drain pipe; and through the optimized design of the internal flow channel structure of the condensing heat exchanger 100, the atomized condensed water is discharged more smoothly along with the flue gas, improving the discharge efficiency of the condensed water. When the condensing heat exchanger 100 is applied to a condensing gas water heater, since the installation step of externally connecting a drain pipe is omitted, the installation convenience of the condensing gas water heater can be improved, and the overall appearance integrity of the whole machine is better without externally connecting a drain pipe, and the appearance quality is better, thus making the whole machine more beautiful.

[0037] Please refer to Figure 1 and Figure 2, in an embodiment of the present utility model, the condensation heat exchanger 100 includes a box body 10, a condensation heat exchange tube 20, and an atomization module 30. The box body 10 is provided with a smoke inlet 101 and a smoke outlet 102. A baffle 11 is arranged inside the box body 10. The baffle 11 divides the inner cavity of the box body 10 into a smoke inlet flow channel 103 communicated with the smoke inlet 101 and a smoke outlet flow channel 104 communicated with the smoke outlet 102. A water collection cavity 105 for communicating the smoke inlet flow channel 103 with the smoke outlet flow channel 104 is further formed inside the box body 10. The condensation heat exchange tube 20 is arranged inside the smoke inlet flow channel 103. The condensation heat exchange tube 20 is separated from the smoke outlet flow channel 104 by the baffle 11. The water collection cavity 105 is used for collecting the condensed water generated by the condensation heat exchange tube 20. The atomization module 30 is arranged in the box body 10. The atomization module 30 is used for atomizing the condensed water in the water collection cavity 105.

[0038] Please refer to Figures 3 to 5, the condensing heat exchanger 100 can be applied to a condensing gas water heater. The condensing gas water heater may include a water heater body 200 and a condensing heat exchanger 100. Among them, the water heater body 200 is the main component for realizing combustion and heat exchange, and the water heater body 200 has a flue for the flue gas to flow through. The smoke inlet 101 of the condensing heat exchanger 100 is communicated with the flue inside the water heater body 200, and the flue gas generated by the water heater body 200 enters the box body 10 through the smoke inlet 101 to exchange heat with the condensing heat exchange tube 20. Among them, the condensing gas water heater can be a forced-draft gas water heater or a forced-blow gas water heater. Taking the condensing gas water heater as a forced-draft gas water heater as an example, the water heater body 200 may include a burner 210, a main heat exchanger 220, and a fan 230 that are sequentially arranged from bottom to top in the height direction thereof. The burner 210 is communicated with the smoke inlet end of the flue. The main heat exchanger 220 includes at least part of the main heat exchange tubes arranged in the flue. The air inlet of the fan 230 is communicated with the smoke outlet end of the flue, and the air outlet of the fan 230 is communicated with the smoke inlet 101. The water outlet end of the condensing heat exchange tube 20 is communicated with the water inlet end of the main heat exchange tube. Both the condensing heat exchanger 100 and the water heater body 200 are accommodated in the casing 300 of the condensing gas water heater. The bottom of the casing 300 may be provided with a water inlet joint communicated with the water inlet end of the condensing heat exchange tube 20 and a water outlet joint communicated with the water outlet end of the main heat exchange tube. When the condensing gas water heater works, the burner 210 burns to generate high-temperature flue gas. The high-temperature flue gas flows to the main heat exchanger 220 under the action of the fan 230 for primary heat exchange to heat the water in the main heat exchange tube. The flue gas after heat exchange is transported by the fan 230 to the condensing heat exchanger 100 for secondary heat exchange to heat the water in the condensing heat exchange tube 20. And the cold water of the external water circuit system is first preheated through the condensing heat exchange tube 20 and then transported to the main heat exchange tube for heating. In this way, the latent heat of vaporization of the flue gas can be fully utilized, the energy consumption can be saved, and the hot water output efficiency can be improved.

[0039] In this embodiment, the flue gas discharged from the water heater body 200 is conveyed through the smoke inlet 101 of the condensation heat exchanger 100 into the smoke inlet channel 103 for heat exchange with the condensation heat exchange pipes 20, so as to heat the water in the condensation heat exchange pipes 20. The condensed water generated on the surface of the condensation heat exchange pipes 20 is collected in the water collection cavity 105, atomized by the atomization module 30, and then flows with the flue gas into the smoke exhaust channel 104, and finally is discharged from the smoke exhaust port 102; in this way, the discharge of condensed water can be achieved without an external drain pipe. And the condensation heat exchange pipes 20 are located in the smoke inlet channel 103 and separated from the smoke exhaust channel 104 by the baffle plate 11, that is to say, the condensation heat exchange pipes 20 will not cross the baffle plate 11 to occupy the internal space of the smoke exhaust channel 104. In this way, the inside of the smoke exhaust channel 104 is unobstructed, which can reduce the resistance of the atomized condensed water to be discharged with the flue gas, and can avoid the atomized condensed water from being blocked by the condensation heat exchange pipes 20 during the discharge process and re-condensing into condensed water, thereby improving the atomization effect of the condensed water and enhancing the discharge efficiency of the condensed water.

[0040] It should be noted that the baffle plate 11 can be integrally formed with the box body 10, or the baffle plate 11 can also be an independent component assembled and connected to the box body 10. Optionally, both the box body 10 and the baffle plate 11 are made of sheet metal. The baffle plate 11 and the box body 10 can be assembled and connected by welding, screw connection and other methods. Of course, the box body 10 and the baffle plate 11 can also be integrally injection molded with a high-temperature resistant plastic material. The condensation heat exchange pipes 20 can be single heat exchange pipes or multiple heat exchange pipes, and the multiple heat exchange pipes can be connected to the water circuit system in series or in parallel. In addition, there are various ways for the atomization module 30 to realize the atomization of condensed water. The atomization module 30 can adopt ultrasonic atomization, jet atomization, vibrating sieve hole atomization and other ways to realize atomization. For example, the atomization module 30 can atomize the condensed water in the water collection cavity 105 through an ultrasonic atomization sheet; or for example, the atomization module 30 can suck the condensed water in the water collection cavity 105 and atomize and spray it through an atomizing nozzle. Of course, the atomization module 30 can also adopt other atomization methods, as long as it can atomize the condensed water in the water collection cavity 105, and no specific limitation is made here. The number of the atomization modules 30 can be set to one, two, three or more according to actual needs. In order to ensure the atomization effect, the total atomization capacity of all the atomization modules 30 should generally be higher than the maximum condensed water generation amount in the whole machine working condition.

[0041] In order to enable the atomized condensed water to be discharged more smoothly, optionally, the atomization module 30 is disposed opposite to the inlet end of the smoke exhaust channel 104. In this way, the condensed water atomized by the atomization module 30 can enter the smoke exhaust channel more smoothly from the inlet end of the smoke exhaust channel 104, and then be discharged from the smoke exhaust port 102 together with the flue gas.

[0042] For the convenience of collecting condensed water, as Figure 2 shown, in one embodiment, the smoke inlet flow channel 103 and the smoke exhaust flow channel 104 are disposed on both sides of the baffle 11 along a first direction, the water collection cavity 105 is located below the baffle 11, the top of the water collection cavity 105 is open, the bottom ends of the smoke inlet flow channel 103 and the smoke exhaust flow channel 104 are respectively communicated with the open top of the water collection cavity 105, wherein the first direction intersects with the height direction of the box body 10.

[0043] In this embodiment, the box body 10 is generally in a cylindrical shape extending vertically, the height direction of the box body 10 is also the up and down direction, and the first direction can be the left and right direction or the front and back direction. When the condensing heat exchanger 100 is applied to a condensing gas water heater, the first direction can be the width direction or the thickness direction of the condensing gas water heater. Taking the first direction as the left and right direction as an example, the smoke inlet flow channel 103 and the smoke exhaust flow channel 104 are disposed on the left and right sides of the baffle 11 respectively, and the water collection cavity 105 is located below the smoke inlet flow channel 103 and the smoke exhaust flow channel 104. For example, the baffle 11 is generally in an inverted "L" shape structure, the baffle 11 extends downward from the top of the box body 10 and there is a certain interval between the baffle 11 and the bottom wall of the box body 10. In this way, the smoke inlet flow channel 103 and the smoke exhaust flow channel 104 are defined between the left and right sides of the baffle 11 and the two side walls of the box body 10 respectively, and the water collection cavity 105 is defined between the bottom side of the baffle 11 and the bottom wall of the box body 10. The flue gas in the smoke inlet flow channel 103 exchanges heat with the condensing heat exchange tube 20 and flows downward to the water collection cavity 105, and the flue gas blows the atomized condensed water in the water collection cavity 105 to the smoke exhaust flow channel 104, so that the atomized condensed water flows upward along the smoke exhaust flow channel 104 together with the flue gas to be discharged from the smoke exhaust port 102. Since the water collection cavity 105 is located below the smoke inlet flow channel 103, in this way, the condensed water on the surface of the condensing heat exchange tube 20 can drip into the water collection cavity 105 under the action of gravity, and there is no need to set other power devices for transporting the condensed water. And the downward flowing direction of the flue gas in the smoke inlet flow channel 103 is generally consistent with the dripping direction of the condensed water, so that the dripping of the condensed water on the surface of the condensing heat exchange tube 20 can be accelerated under the blowing action of the flue gas, and no water film will be formed on the surface of the condensing heat exchange tube 20, which can improve the heat exchange efficiency between the condensing heat exchange tube 20 and the flue gas.

[0044] Optionally, the casing 10 includes a casing body and a smoke exhaust pipe extending upward from the top of the casing body. A baffle 11 is provided inside the casing body, a smoke inlet 101 is provided on the side of the casing body, and a smoke outlet 102 is provided at the top of the smoke exhaust pipe. The cross-sectional area of the casing body is larger than that of the smoke exhaust pipe, so that there is enough space inside the casing body to divide into a smoke inlet flow channel 103, a smoke exhaust flow channel 104 and a water collection cavity 105; the cross-sectional area of the smoke exhaust pipe is relatively small, and the top of the casing body is in a tapered structure that tapers towards the smoke exhaust pipe, which can help gather and guide the flue gas to the smoke exhaust pipe and finally discharge it through the smoke exhaust pipe. When applied to a condensing gas water heater, the condensing heat exchanger 100 can be installed at a position near the upper left corner or the upper right corner inside the casing 300. A through hole opposite to the smoke exhaust pipe is provided at the top of the casing 300 to facilitate connecting the smoke exhaust pipe to the smoke exhaust duct.

[0045] As Figure 2 shown, in one embodiment, a guiding surface 12 is provided at the bottom end of the smoke inlet flow channel 103 inside the casing 10. The guiding surface 12 is located on the side of the smoke inlet flow channel 103 away from the baffle 11, and the guiding surface 12 extends obliquely downward towards the side close to the smoke exhaust flow channel 104. In this embodiment, by providing the inclined guiding surface 12, on the one hand, the flue gas at the outlet end of the smoke inlet flow channel 103 can be guided to the smoke exhaust flow channel 104, and on the other hand, when the condensed water drops onto the guiding surface 12, it can flow down more smoothly into the water collection cavity 105.

[0046] As Figure 2 shown, in one embodiment, a partition 13 is provided in the water collection cavity 105. The partition 13 divides the water collection cavity 105 into a first cavity 105a and a second cavity 105b arranged side by side along the first direction. The first cavity 105a is located below the smoke inlet flow channel 103, and the second cavity 105b is located on the side of the first cavity 105a close to the smoke exhaust flow channel 104. The partition 13 is provided with a water passing hole 131 that communicates the first cavity 105a with the second cavity 105b. The atomization module 30 is correspondingly arranged for the second cavity 105b to atomize the condensed water in the second cavity 105b.

[0047] In this embodiment, a partition 13 is provided in the water collection cavity 105. The water collection cavity 105 is separated into a first cavity 105a and a second cavity 105b by the partition 13. The first cavity 105a is located below the smoke inlet channel 103. In this way, most of the condensed water on the surface of the condensation heat exchange tube 20 in the smoke inlet channel 103 can drip into the first cavity 105a under the action of gravity and gather. Since the condensed water usually contains a certain amount of impurities, the condensed water containing impurities can be purified by natural sedimentation in the first cavity 105a. The purified condensed water enters the second cavity 105b through the water passing port 131, and then the atomization module 30 atomizes the condensed water in the second cavity 105b. In this way, a large amount of impurities can be avoided from contacting the atomization module 30 and affecting the atomization effect.

[0048] In one embodiment, an installation opening is provided on the bottom wall of the second cavity 105b. The atomization module 30 includes a base and an atomizing member provided on the top of the base. The base is fixed to the bottom side of the box body 10, and the atomizing member is placed in the second cavity 105b from the installation opening. In this way, by accommodating the atomizing member in the second cavity 105b, the atomizing member can come into large-area contact with the condensed water in the second cavity 105b for atomization, which can improve the atomization effect. Among them, the atomizing member can adopt an ultrasonic atomizing sheet. Optionally, the atomizing member is disposed opposite to the inlet end of the smoke exhaust channel, so that the atomized condensed water can enter the smoke exhaust channel more smoothly along with the smoke, further improving the discharge efficiency of the condensed water. To further improve the atomization efficiency, optionally, a plurality of atomization modules 30 are provided. For example, two atomization modules 30 can be arranged side by side below the inlet end of the smoke exhaust channel. Optionally, the atomization module 30 is detachably connected to the box body 10. In this way, the disassembly and maintenance of the atomization module 30 can be facilitated. For example, the base can be connected and fixed to the box body 10 through fasteners (such as screws, bolts, etc.). Specifically, the base can be set as a square seat, and the four corners of the base are respectively connected and fixed to the box body 10 through fasteners. In addition, to prevent the condensed water in the second cavity 105 from leaking out from the installation opening, optionally, a sealing member is provided between the base and the box body 10, and the sealing member can seal the periphery of the installation opening and the base.

[0049] It can be understood that in actual applications, there may be a small amount of residual condensed water in the water collection cavity 105 due to incomplete atomization. When the condensing gas water heater is not used for a long time, the residual condensed water will corrode the condensation heat exchanger 100 due to its acidity. Based on this, as Figure 2As shown, in one embodiment, the bottom wall of the box body 10 is provided with a drain port 106 connected to the water collecting chamber 105, and the drain port 106 is used to be opened or closed under the control of a drain valve. When the condensing gas water heater works normally, the drain port 106 is closed by the drain valve, and the condensed water in the water collecting chamber 105 is atomized by the atomizing module 30 and then discharged with the flue gas. When the condensing gas water heater is not used for a long time, the drain port 106 can be opened by the drain valve to discharge the condensed water in the water collecting chamber 105 to avoid corrosion to the condensing heat exchanger 100. Among them, the drain valve can be a drain valve on the water heater body 200. When the condensing heat exchanger 100 and the water heater body 200 are assembled, the drain valve on the water heater body 200 can be used to open or close the drain port 106. Alternatively, the drain valve can also be a drain valve provided by the condensing heat exchanger 100. In addition, the drain valve can be a mechanical valve or a solenoid valve.

[0050] Please refer to Figure 1 and Figure 2 In one embodiment, the box body 10 includes a first side wall 10a and a second side wall 10b arranged opposite to each other along the first direction, the smoke inlet 101 is arranged on the first side wall 10a, the smoke exhaust port 102 is arranged on the top wall of the box body 10, and the baffle 11 includes a first plate body 111 arranged opposite to the smoke exhaust port 102, a second plate body 112 arranged opposite to the smoke inlet 101, and an intermediate plate body 113 connected between the first plate body 111 and the second plate body 112, and the intermediate plate body 113 is an arc-shaped plate arched toward the side away from the smoke inlet 101.

[0051] Specifically, the baffle 11 includes a first plate 111, an intermediate plate 113, and a second plate 112 connected in sequence, one side of the first plate 111 is connected to the first side wall 10a and is located on the upper side of the smoke inlet 101, the other side of the first plate 111 extends to the middle of the box body 10 in the transverse direction, the intermediate plate 113 is bent downward relative to the first plate 111, the second plate 112 extends downward from the bottom side of the intermediate plate 113, and a certain gap is formed between the bottom side of the second plate 112 and the bottom wall of the box body 10. The intermediate plate 113 is an arc-shaped plate arched toward the side away from the smoke inlet 101, and the smoke entering from the smoke inlet 101 can smoothly change its flow direction under the guidance of the arc surface of the intermediate plate 113, and then flow downward along the second plate 112. Optionally, the first plate body 111 , the middle plate body 113 , and the second plate body 112 are integrally formed, for example, they may be integrally formed by bending a sheet metal part.

[0052] Please refer to Figure 1 and Figure 2, in one embodiment, the casing 10 further includes a third side wall 10c and a fourth side wall 10d oppositely arranged in the second direction. The condensation heat exchange tube 20 is arranged to extend circuitously between the third side wall 10c and the fourth side wall 10d, and is arranged in multiple rows along the height direction of the casing 10. The third side wall 10c is provided with a water inlet interface 107 communicating with the water inlet end of the condensation heat exchange tube 20, and a water outlet interface 108 communicating with the water outlet end of the condensation heat exchange tube 20. Wherein, the first direction, the second direction, and the height direction of the casing 10 intersect pairwise. Thus, the cold water in the external water circuit system is conveyed into the condensation heat exchange tube 20 through the water inlet interface 107, and after being heated by the flue gas, it is output from the water outlet interface 108 to other pipelines (such as the main heat exchange tube). The condensation heat exchange tube 20 is arranged to extend circuitously between the third side wall 10c and the fourth side wall 10d, and is arranged in multiple rows along the height direction of the casing 10. Thus, the length of the condensation heat exchange tube 20 can be extended as much as possible within a limited space, thereby improving the heat exchange efficiency.

[0053] For example, in one embodiment, the condensation heat exchange tube 20 includes a plurality of sub heat exchange tubes arranged along the height direction of the casing 10. Each sub heat exchange tube is arranged to extend circuitously between the third side wall 10c and the fourth side wall 10d (for example, it can be arranged in a U-shaped tube or an M-shaped tube). The adjacent two rows of sub heat exchange tubes are arranged in a staggered manner. A water box 14 is provided outside the third side wall 10c. An inlet chamber and an outlet chamber are formed inside the water box 14 and are separated from each other. The water box 14 is provided with a water inlet interface 107 communicating with the inlet chamber, and a water outlet interface 108 communicating with the outlet chamber. The water inlet end of each sub heat exchange tube is communicated with the water inlet interface 107 through the inlet chamber, and the water outlet end of each sub heat exchange tube is communicated with the water outlet interface 108 through the outlet chamber. Thus, the condensation heat exchange tube 20 is formed by connecting a plurality of sub heat exchange tubes in parallel. Of course, in some embodiments, the condensation heat exchange tube 20 can also be formed by connecting a plurality of sub heat exchange tubes in series.

[0054] Based on the above embodiments, in one embodiment, the condensation heat exchanger 100 further includes a liquid level detection device. The liquid level detection device is used to detect the liquid level in the water collection chamber 105. The atomization module 30 is used to be turned on when the liquid level in the water collection chamber 105 reaches a first preset liquid level, and is used to be turned off when the liquid level in the water collection chamber 105 reaches a second preset liquid level; wherein, the first preset liquid level is higher than the second preset liquid level, and the second preset liquid level is higher than the atomization module 30.

[0055] In this embodiment, the liquid level detection device and the atomization module 30 can be electrically connected to the controller respectively. When the liquid level detection device detects that the liquid level in the water collection chamber 105 reaches the first preset liquid level, it sends a first signal to the controller. The controller controls the atomization module 30 to start according to the first signal. Then, the atomization module 30 can atomize the condensed water in the water collection chamber 105, so that the atomized condensed water is discharged along with the flue gas. In this way, the atomization function can be started in time when the liquid level of the condensed water in the water collection chamber 105 is relatively high, avoiding the formation of a liquid seal at the inlet end of the smoke exhaust passage due to too high a liquid level and affecting the normal discharge of the flue gas. When the liquid level detection device detects that the liquid level in the water collection chamber 105 reaches the second preset liquid level, it sends a second signal to the controller. The controller controls the atomization module 30 to close according to the second signal and stops atomization. In this way, the atomization function can be closed in time when the liquid level of the condensed water in the water collection chamber 105 is relatively low, thus preventing the atomization module 30 from dry burning and being damaged. Among them, the liquid level detection device can adopt a contact type liquid level detection device (such as a differential pressure type liquid level sensor, a float type liquid level sensor, etc.), or a non-contact type liquid level detection device (such as an ultrasonic liquid level sensor, a laser liquid level sensor, etc.).

[0056] As Figure 4 shown, in one embodiment, the liquid level detection device includes a first detection element 41 disposed at the first preset liquid level and a second detection element 42 disposed at the second preset liquid level. The first detection element 41 is used to detect whether the liquid level in the water collection chamber 105 reaches the first preset liquid level, and the second detection element 42 is used to detect whether the liquid level in the water collection chamber 105 reaches the second preset liquid level. In this way, when the first detection element 41 detects that the liquid level in the water collection chamber 105 reaches the first preset liquid level, it sends a first signal to the controller. The controller controls the atomization module 30 to start according to the first signal. Then, the atomization module 30 can atomize the condensed water in the water collection chamber 105, so that the atomized condensed water is discharged along with the flue gas. When the second detection element 42 detects that the liquid level in the water collection chamber 105 reaches the second preset liquid level, it sends a second signal to the controller. The controller controls the atomization module 30 to close according to the second signal and stops atomization. Among them, the first detection element 41 and the second detection element 42 can adopt contact type liquid level sensors (such as differential pressure type liquid level sensors, float type liquid level sensors, etc.).

[0057] As Figures 3 to 5 shown, the present utility model also provides a condensing gas water heater, which includes a water heater body 200 and a condensing heat exchanger 100. The flue gas inlet 101 of the condensing heat exchanger 100 is communicated with the flue of the water heater body 200. The specific structure of the condensing heat exchanger 100 refers to the above embodiment. Since this condensing gas water heater adopts all the technical solutions of the above all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated one by one here.

[0058] In this embodiment, the condensing gas water heater includes a condensing heat exchanger 100, a water heater body 200, and a casing 300 for accommodating the condensing heat exchanger 100 and the water heater body 200. Among them, the water heater body 200 is the main component for realizing combustion and heat exchange, and the water heater body 200 has a flue for the flue gas to flow through. The smoke inlet 101 of the condensing heat exchanger 100 is communicated with the flue inside the water heater body 200, and the flue gas generated by the water heater body 200 enters the box body 10 through the smoke inlet 101 to exchange heat with the condensing heat exchange tubes 20. Among them, the condensing gas water heater can be a forced exhaust type gas water heater or a forced draft type gas water heater. The flue gas discharged from the water heater body 200 is conveyed to the smoke inlet flow channel 103 through the smoke inlet 101 of the condensing heat exchanger 100 to exchange heat with the condensing heat exchange tubes 20, so as to heat the water in the condensing heat exchange tubes 20. The condensed water generated on the surface of the condensing heat exchange tubes 20 is collected in the water collection cavity 105, atomized by the atomization module 30, and then flows with the flue gas to the smoke exhaust flow channel 104 and is finally discharged from the smoke exhaust port 102; in this way, the discharge of condensed water can be realized without connecting an external drain pipe. And the condensing heat exchange tubes 20 are located in the smoke inlet flow channel 103 and are separated from the smoke exhaust flow channel 104 by the baffle plate 11, that is to say, the condensing heat exchange tubes 20 will not cross the baffle plate 11 to occupy the internal space of the smoke exhaust flow channel 104. In this way, the inside of the smoke exhaust flow channel 104 is unobstructed, which can reduce the resistance of the atomized condensed water to be discharged with the flue gas, and can avoid the atomized condensed water from being blocked by the condensing heat exchange tubes 20 during the discharge process and condensing into condensed water again, so as to improve the atomization effect of the condensed water and enhance the discharge efficiency of the condensed water; and it can improve the installation convenience of the condensing gas water heater, and the whole machine is more beautiful without connecting an external drain pipe.

[0059] In one of the embodiments, the water heater body 200 includes a burner 210, a main heat exchanger 220, and a blower 230 arranged in sequence from bottom to top. The burner 210 is communicated with the smoke inlet end of the flue. The main heat exchanger 220 includes main heat exchange tubes at least partially arranged in the flue. The air inlet of the blower 230 is communicated with the smoke outlet end of the flue. The air outlet of the blower 230 is communicated with the smoke inlet 101. The water outlet end of the condensing heat exchange tube 20 is communicated with the water inlet end of the main heat exchange tube.

[0060] In this embodiment, the condensing gas water heater specifically relates to a strongly exhausted gas water heater. The condensing heat exchanger 100 and the water heater body 200 are both accommodated in the casing 300 of the condensing gas water heater. An inlet joint communicating with the water inlet end of the condensing heat exchange pipe 20 and an outlet joint communicating with the water outlet end of the main heat exchange pipe may be provided at the bottom of the casing 300. Among them, the main heat exchanger 200 can be a non-coiled heat exchanger or a coiled heat exchanger. When the main heat exchanger 200 is a non-coiled heat exchanger, its main heat exchange pipe is accommodated in the flue. When the main heat exchanger 200 is a coiled heat exchanger, a part of its main heat exchange pipe can be accommodated in the flue, and the other part is wound around the outer wall surface of the flue. When the condensing gas water heater works, the burner 210 burns to generate high-temperature flue gas. The high-temperature flue gas flows under the action of the fan 230 to exchange heat with the main heat exchanger 220 for the first time to heat the water in the main heat exchange pipe. The flue gas after heat exchange is transported by the fan 230 to the condensing heat exchanger 100 for the second heat exchange to heat the water in the condensing heat exchange pipe 20. And the cold water of the external water circuit system is first preheated through the condensing heat exchange pipe 20 and then transported to the main heat exchange pipe for heating. In this way, the latent heat of vaporization of the flue gas can be fully utilized, energy consumption can be saved, and the hot water output efficiency can be improved.

[0061] The above are only the optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A condensing heat exchanger, characterized in that: include: A box body is provided with a smoke inlet and a smoke exhaust port, a baffle is provided in the box body, the baffle divides the inner cavity of the box body into a smoke inlet channel connected to the smoke inlet and a smoke exhaust channel connected to the smoke exhaust port, and a water collecting chamber is also provided in the box body to connect the smoke inlet channel with the smoke exhaust channel; A condensation heat exchange tube is arranged in the smoke inlet flow channel and is separated from the smoke exhaust flow channel by the baffle plate, and the water collecting chamber is used to collect condensed water generated by the condensation heat exchange tube; as well as An atomization module is arranged in the box body, and is used to atomize the condensed water in the water collecting chamber.

2. The condensing heat exchanger according to claim 1, characterized in that: The atomization module is arranged opposite to the inlet end of the smoke exhaust channel.

3. The condensing heat exchanger according to claim 1, characterized in that: The smoke inlet channel and the smoke exhaust channel are arranged on both sides of the baffle along a first direction, the water collecting chamber is located below the baffle, the top of the water collecting chamber is open, and the smoke inlet channel and the smoke exhaust channel are respectively connected to the top opening of the water collecting chamber, wherein the first direction intersects with the height direction of the box body.

4. The condensing heat exchanger according to claim 3, characterized in that: A guide surface is provided in the box body at the bottom end of the smoke inlet channel. The guide surface is located on a side of the smoke inlet channel away from the baffle plate. The guide surface is inclined and extends from top to bottom toward a side close to the smoke exhaust channel.

5. The condensing heat exchanger according to claim 3, characterized in that: A partition is provided in the water collecting chamber, and the partition divides the water collecting chamber into a first cavity and a second cavity arranged side by side along the first direction. The first cavity is located below the smoke inlet channel, and the second cavity is located on a side of the first cavity close to the smoke exhaust channel. The partition is provided with a water outlet connecting the first cavity with the second cavity, and the atomization module is arranged corresponding to the second cavity for atomizing the condensed water in the second cavity.

6. The condensing heat exchanger according to claim 5, characterized in that: The bottom wall of the second cavity is provided with an installation opening, the atomization module includes a base and an atomization component arranged on the top of the base, the base is fixed to the bottom side of the box, and the atomization component is placed in the second cavity through the installation opening.

7. The condensing heat exchanger according to claim 3, characterized in that: The bottom wall of the box body is provided with a drain port communicated with the water collecting chamber, and the drain port is used to be opened or closed under the control of a drain valve.

8. The condensing heat exchanger according to claim 3, characterized in that: The box body includes a first side wall and a second side wall arranged opposite to each other along the first direction, the smoke inlet is arranged on the first side wall, the smoke exhaust port is arranged on the top wall of the box body, the baffle includes a first plate body arranged opposite to the smoke exhaust port, a second plate body arranged opposite to the smoke inlet, and an intermediate plate body connected between the first plate body and the second plate body, and the intermediate plate body is arranged in the form of an arc-shaped plate arched toward a side away from the smoke inlet.

9. The condensing heat exchanger according to claim 8, characterized in that: The box body also includes a third side wall and a fourth side wall arranged opposite to each other along the second direction, the condensation heat exchange tube is arranged to extend between the third side wall and the fourth side wall, and is arranged in multiple rows along the height direction of the box body, the third side wall is provided with a water inlet interface connected to the water inlet end of the condensation heat exchange tube, and a water outlet interface connected to the water outlet end of the condensation heat exchange tube, wherein the first direction, the second direction, and the height direction of the box body intersect each other.

10. The condensing heat exchanger according to any one of claims 1 to 9, characterized in that: The condensing heat exchanger also includes a liquid level detection device, which is used to detect the liquid level in the water collecting chamber. The atomization module is used to turn on when the liquid level in the water collecting chamber reaches a first preset liquid level, and is used to turn off when the liquid level in the water collecting chamber reaches a second preset liquid level; wherein the first preset liquid level is higher than the second preset liquid level, and the second preset liquid level is higher than the atomization module.

11. A condensing gas water heater, characterized in that: include: Water heater body; as well as The condensing heat exchanger according to any one of claims 1 to 10, wherein the smoke inlet of the condensing heat exchanger is connected to the flue of the water heater body.

12. The condensing gas water heater according to claim 11, characterized in that: The water heater body includes a burner, a main heat exchanger and a fan which are arranged in sequence from bottom to top, the burner is connected to the smoke inlet end of the flue, the main heat exchanger includes a main heat exchange pipe which is at least partially arranged in the flue, the air inlet of the fan is connected to the smoke outlet end of the flue, the air outlet of the fan is connected to the smoke inlet, and the water outlet end of the condensing heat exchange pipe is connected to the water inlet end of the main heat exchange pipe.

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