Condensation heat exchanger, condensation heat exchange system and water heater

Abstract

The utility model relates to the field of household appliances, and discloses a condensation heat exchanger, a condensation heat exchange system and a water heater. According to the condensation heat exchanger, the condensation heat exchange system and the water heater, the heat efficiency of a conventional gas water heater can be improved, installation is convenient and fast, the improvement cost is low, and normal use of gas heating equipment is not affected. The condensing heat exchanger comprises a body, a heat exchange mechanism, a connecting mechanism and a smoke guide mechanism, a body smoke inlet is formed in the bottom of the body, and a body smoke outlet is formed in the top of the body; the heat exchange mechanism and the smoke guide mechanism are arranged in the body, and the heat exchange mechanism is used for conducting heat exchange on a cold medium circulating in the heat exchange mechanism; the connecting mechanism is arranged at the body smoke inlet, and the body smoke inlet is detachably connected with an outlet of a smoke discharging mechanism of the gas heating device in a sealed mode through the connecting mechanism. The smoke guide mechanism is located between the body smoke inlet and the body smoke outlet and used for changing the flowing direction of smoke in the body, prolonging the convection path of high-temperature smoke and improving the heat exchange efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of household electrical appliances, and in particular to a condensing heat exchanger, a condensing heat exchange system and a water heater. Background Art

[0002] Gas water heaters are a common household hot water preparation device. They use gas as fuel, transfer heat to cold water flowing through a heat exchanger through combustion heating, and achieve the purpose of preparing hot water. During the use of gas water heaters, gas combustion will produce a lot of exhaust gas, which needs to be discharged to the outside or public flue through the exhaust pipe to prevent exhaust gas from polluting indoor air and ensure personal safety. However, the flue gas discharged through the exhaust pipe has a certain amount of heat. Directly discharging these flue gases to the outside will cause heat loss, which is not conducive to energy conservation and environmental protection, and also affects the thermal efficiency of the gas water heater.

[0003] Therefore, a condensing gas water heater has emerged, which absorbs the latent heat in the high-temperature flue gas through a built-in condensing heat exchange device, and has the advantages of high thermal efficiency, environmental protection and energy saving. However, for users who have already used conventional gas water heaters, if they want to save energy and improve thermal efficiency, they can only replace the water heater as a whole, which is costly and cumbersome, and will also affect daily use, causing great inconvenience to users. Utility Model Content

[0004] In view of this, the utility model provides a condensing heat exchanger, a condensing heat exchange system and a water heater to solve the problem that if the thermal efficiency of the existing conventional gas water heater is to be improved, it can only be replaced as a whole, which is costly, cumbersome and affects normal use.

[0005] In a first aspect, the utility model provides a condensing heat exchanger, comprising:

[0006] A body, having a body smoke inlet at the bottom and a body smoke exhaust at the top;

[0007] A heat exchange mechanism is disposed in the body, and is used to exchange heat for a cold medium circulating inside the body;

[0008] A connecting mechanism is arranged at the smoke inlet of the main body, and the smoke inlet of the main body is detachably and hermetically connected to the outlet of the smoke exhaust mechanism of the gas heating equipment through the connecting mechanism;

[0009] A smoke guiding mechanism is arranged in the body, and the smoke guiding mechanism is located between the smoke inlet of the body and the smoke exhaust port of the body, and the smoke guiding mechanism is used to change the flow direction of the smoke entering the body from the smoke inlet of the body.

[0010] Beneficial effects: The condensing heat exchanger of the utility model includes a body, a heat exchange mechanism, a connecting mechanism and a smoke guide mechanism. The body has a body smoke inlet at the bottom and a body smoke exhaust at the top. The body smoke inlet is detachably and sealably connected to the exhaust mechanism outlet of the gas heating equipment through the connecting mechanism. The body smoke exhaust port of the condensing heat exchanger of the utility model is arranged at the top of the body and connected to the exhaust pipe assembly of the conventional water heater; and the body smoke inlet is arranged at the bottom of the body, and the body smoke inlet also has a connecting mechanism, which is convenient for the installation and connection of the condensing heat exchanger with the exhaust mechanism outlet of the conventional gas water heater, and can conveniently realize the modification of the conventional gas water heater with the condensing heat exchanger, thereby improving the thermal efficiency of the conventional gas water heater, saving energy, and being easy to operate without affecting the normal use of the user. In addition, the condensing heat exchanger of the present invention also has a smoke guiding mechanism. The smoke exhausted by the gas heating equipment enters the condensing heat exchanger body from bottom to top. The smoke guiding mechanism can change the flow direction of the smoke entering the body from the smoke inlet of the body, increase the path length of the smoke in the body, and increase the heat exchange time between the smoke and the cold medium in the heat exchange mechanism, thereby achieving full utilization of the thermal energy of the high-temperature smoke and further improving the thermal efficiency.

[0011] In an optional embodiment, the smoke guiding mechanism is arranged close to the smoke inlet of the main body.

[0012] Beneficial effect: The condensing heat exchanger of the utility model arranges the smoke guiding mechanism at a position close to the smoke inlet of the main body, so that the smoke can be guided by the smoke guiding mechanism as soon as it enters the main body from the smoke inlet, thereby changing the flow direction, increasing the path length of the smoke in the main body, and increasing the heat exchange time between the smoke and the cold medium in the heat exchange mechanism, thereby fully utilizing the thermal energy of the high-temperature smoke and further improving the thermal efficiency.

[0013] In an optional embodiment, the smoke guiding mechanism includes a smoke guiding inlet and a smoke guiding exhaust port, the smoke guiding inlet is the main body smoke inlet, and the smoke inlet direction of the main body smoke inlet is perpendicular to the smoke exhaust direction of the smoke guiding exhaust port.

[0014] Beneficial effect: In the condensing heat exchanger of the utility model, the smoke inlet direction of the main body smoke inlet is perpendicular to the smoke exhaust direction of the smoke guide and exhaust port, so that the flow direction of the smoke entering the main body from the main body smoke inlet can be changed by nearly 90°, so that the smoke flow path is maximized, the heat exchange is most sufficient, and the thermal efficiency is highest.

[0015] In an optional embodiment, the smoke guiding mechanism further includes a smoke guiding cavity, the bottom of which is connected to the bottom of the body, and the bottom of the smoke guiding cavity has the smoke guiding inlet, and the smoke guiding exhaust port is arranged on the side wall of the smoke guiding cavity.

[0016] Beneficial effect: The smoke guiding mechanism of the condensing heat exchanger of the utility model also includes a smoke guiding cavity. All smoke entering the main body through the smoke inlet needs to be guided and then discharged from the smoke guiding and exhaust port. It can reliably guide all smoke, ensure heat exchange efficiency, and avoid waste of heat energy of smoke.

[0017] In an optional embodiment, part of the structure of the heat exchange mechanism is arranged between the inner wall of the body and the outer wall of the smoke guiding cavity.

[0018] Beneficial effects: In the condensing heat exchanger of the utility model, there is a spacing space between the inner wall of the body and the outer wall of the smoke guide cavity, and part of the structure of the heat exchange mechanism is arranged between the inner wall of the body and the outer wall of the smoke guide cavity, so as to fully utilize the internal space of the body and facilitate the structural layout.

[0019] In an optional embodiment, it further includes a condensate discharge mechanism, which is disposed on the main body and is used to discharge condensate generated by heat exchange in the main body.

[0020] Beneficial effect: The condensing heat exchanger of the utility model will produce condensed water during the heat exchange process of the cold medium. The condensed water generated by the heat exchange in the body can be discharged in time through the condensed water discharge mechanism, avoiding the accumulation of condensed water in the body and affecting the subsequent heat exchange process of the cold medium.

[0021] In an optional embodiment, the condensate discharge mechanism includes a condensate discharge outlet, which is arranged on the side wall of the bottom of the main body and connected to the interior of the main body, and a water diversion structure is arranged at the bottom of the main body near the condensate discharge outlet.

[0022] Beneficial effect: In the condensing heat exchanger of the utility model, a water diversion structure is arranged at a position near the condensed water discharge port at the bottom of the main body, so that the condensed water can be discharged from the main body more promptly and smoothly.

[0023] In an optional embodiment, the water diversion structure includes a water diversion slope, and the water diversion slope slopes downward from a side away from the condensed water discharge outlet toward a side close to the condensed water discharge outlet.

[0024] Beneficial effect: The water diversion structure of the condensing heat exchanger of the utility model includes a water diversion slope, which is obliquely arranged at the bottom of the main body, and can guide the condensed water to the condensed water discharge outlet, so as to realize timely and thorough discharge of the condensed water.

[0025] In an optional embodiment, the main body smoke inlet and the main body smoke exhaust port are axially parallel, and the main body is also provided with a cold medium inlet and a cold medium outlet axially parallel, and the axial directions of the cold medium inlet and the cold medium outlet are perpendicular to the axial directions of the main body smoke inlet and the main body smoke exhaust port.

[0026] Beneficial effect: In the condensing heat exchanger of the utility model, the axes of the smoke inlet and the smoke exhaust port are parallel, so that the smoke can be discharged to the outside smoothly, and the axes of the cold medium inlet and the cold medium outlet are perpendicular to the axes of the main body smoke inlet and the main body smoke exhaust port to avoid interference with the pipeline structure and facilitate pipeline connection.

[0027] In an optional embodiment, the connection mechanism is a plug-in connection mechanism, a clamp connection mechanism, or a screw connection mechanism.

[0028] Beneficial effects: The connection mechanism of the condensing heat exchanger of the utility model is a plug-in connection mechanism, a clamp connection mechanism or a spiral connection mechanism. The above connection mechanism has a simple structure, is easy to install and operate, and has good connection reliability.

[0029] In an optional embodiment, the connecting mechanism includes a sealing component, and the sealing component is used to seal the gap between the smoke inlet of the body and the outlet of the smoke exhaust mechanism.

[0030] Beneficial effect: The connection mechanism of the condensing heat exchanger of the utility model also includes a sealing component to ensure the sealing between the smoke inlet of the main body and the outlet of the smoke exhaust mechanism of the gas heating equipment to avoid leakage of high-temperature smoke.

[0031] In an optional embodiment, it further includes a heat exchange gear adjustment mechanism, which is disposed on the main body and is used to adjust an effective heat exchange path of the heat exchange mechanism.

[0032] Beneficial effect: The heat exchange gear adjustment mechanism of the condensing heat exchanger of the utility model can adjust the effective heat exchange path of the heat exchange mechanism according to the actual operation of the gas heating equipment, so as to reduce the influence of the effective heat exchange path of the heat exchange mechanism on the water resistance and improve the user comfort.

[0033] In an optional embodiment, the heat exchange gear adjustment mechanism adjusts the effective heat exchange path of the heat exchange mechanism by changing the height position at which the cold medium enters the heat exchange mechanism.

[0034] Beneficial effect: In the condensing heat exchanger of the utility model, the heat exchange gear adjustment mechanism adjusts the effective heat exchange path of the heat exchange mechanism by changing the height position of the cold medium passing into the heat exchange mechanism. After the cold medium enters the heat exchange mechanism, it will flow from the water inlet end to the water outlet end under the action of the water supply pressure of the tap water pipe, that is, it flows from top to bottom in the heat exchange mechanism of the utility model. The height position at which the cold medium passes into the heat exchange mechanism determines the distance the cold medium flows in the heat exchange mechanism. The longer the distance the cold medium flows in the heat exchange mechanism and the greater the water resistance, the smaller the water outlet flow rate will be, and vice versa. The effective heat exchange path of the heat exchange mechanism is adjusted by changing the height position at which the cold medium passes into the heat exchange mechanism. The adjustment method is simple and the adjustment effect is significant.

[0035] In an optional embodiment, the heat exchange gear adjustment mechanism includes a first cold medium channel and a second cold medium channel arranged on the side wall of the main body, the first cold medium channel and the second cold medium channel respectively correspond to different height positions of the heat exchange mechanism, and the two ends of the first cold medium channel and the second cold medium channel are respectively connected to the cold medium inlet of the heat exchange mechanism and the main body.

[0036] Beneficial effect: The condensing heat exchanger of the utility model, the heat exchange gear adjustment mechanism includes a first cold medium channel and a second cold medium channel arranged on the side wall of the main body. The cold medium can enter the heat exchange mechanism from the cold medium inlet through the first cold medium channel or the second cold medium channel. Since the first cold medium channel and the second cold medium channel respectively correspond to different height positions of the heat exchange mechanism, that is, the first cold medium channel and the second cold medium channel respectively correspond to different effective heat exchange paths of the heat exchange mechanism, thereby realizing the adjustment of the effective heat exchange path. This heat exchange gear adjustment mechanism has a simple structure, is easy to implement, and has low processing and manufacturing costs.

[0037] In an optional embodiment, the first cold medium channel and the second cold medium channel of the heat exchange gear adjustment mechanism are arranged sequentially from top to bottom along the height direction of the heat exchange mechanism, and the first cold medium channel corresponds to the first gear heat exchange of the condensing heat exchanger, and the second cold medium channel corresponds to the second gear heat exchange of the condensing heat exchanger.

[0038] In an optional embodiment, the heat exchange gear adjustment mechanism also includes a channel switch structure, which is arranged at the channel entrances of the first cold medium channel and the second cold medium channel, and the channel switch structure is used to control the opening / closing of the first cold medium channel and the second cold medium channel.

[0039] Beneficial effects: In the condensing heat exchanger of the utility model, the heat exchange gear adjustment mechanism also includes a channel switch structure, and the channel switch structure is used to control the opening / closing of the first cold medium channel and the second cold medium channel. The structure of this heat exchange gear adjustment mechanism is reliable.

[0040] In an optional embodiment, the channel switch structure includes a channel switching component, and when the channel switching component opens the first cold medium channel, the second cold medium channel is closed, and when the channel switching component opens the second cold medium channel, the first cold medium channel is closed.

[0041] Beneficial effect: In the condensing heat exchanger of the utility model, when the channel switching component opens the first cold medium channel, the second cold medium channel is closed, and when the channel switching component opens the second cold medium channel, the first cold medium channel is closed. The structure of this heat exchange gear adjustment mechanism is simple and reliable.

[0042] In an optional embodiment, the channel switching component is movably disposed between the channel entrances of the first cold medium channel and the second cold medium channel and the cold medium inlet along the height direction of the heat exchange mechanism.

[0043] Beneficial effects: In the condensing heat exchanger of the utility model, the channel switching component is movably arranged between the channel entrances of the first cold medium channel and the second cold medium channel and the cold medium inlet along the height direction of the heat exchange mechanism. The structure of this heat exchange gear adjustment mechanism is simple, reliable and easy to implement.

[0044] In an optional embodiment, a temperature detection device is further included, and the temperature detection device is arranged on the main body, and the temperature detection device is used to detect the smoke temperature in the main body.

[0045] Beneficial effects: The condensing heat exchanger of the utility model can detect the flue gas temperature in the main body through the temperature detection device, providing a basis for the subsequent control of the heat exchange gear adjustment mechanism.

[0046] In a second aspect, the utility model further provides a condensation heat exchange system, comprising:

[0047] Cold medium flow detection device;

[0048] A condensing heat exchanger as described above;

[0049] A controller, wherein a signal input end of the controller is connected to a signal output end of the cold medium flow detection device, and a signal output end of the controller is connected to a signal input end of a heat exchange gear adjustment mechanism of the condensing heat exchanger, and the controller controls the heat exchange gear adjustment mechanism to adjust an effective heat exchange path of the heat exchange mechanism according to the cold medium flow detected by the cold medium flow detection device.

[0050] Beneficial effect: The condensing heat exchange system of the utility model can adjust the effective heat exchange path of the heat exchange mechanism according to the actual operation of the gas heating equipment, that is, the flow rate of the cold medium. When the flow rate of the cold medium is small, the user experience is not good. At this time, the effective heat exchange path of the heat exchange mechanism is reduced to reduce water resistance, reduce the impact of the condensation heat exchange process on the flow rate of the cold medium, and improve the user experience. When the flow rate of the cold medium is large, the user experience can be guaranteed. At this time, the effective path of the heat exchange mechanism is increased (or the effective path of the heat exchange mechanism is maintained at a larger level) to improve the heat exchange efficiency, make full use of the flue gas temperature, and save energy.

[0051] In an optional embodiment, the signal input end of the controller is also connected to the signal output end of the temperature detection device in the condensing heat exchanger, and the controller controls the heat exchange gear adjustment mechanism to adjust the effective heat exchange path of the heat exchange mechanism according to the cold medium flow rate and the flue gas temperature detected by the temperature detection device.

[0052] Beneficial effects: The condensing heat exchange system of the utility model obtains the flue gas temperature in the condensing heat exchanger body through the temperature detection device. The controller can control the heat exchange gear adjustment mechanism to adjust the effective heat exchange path of the heat exchange mechanism according to the cold medium flow rate and the flue gas temperature. On the one hand, when the cold medium flow rate is small, the user experience is not good. At this time, the effective heat exchange path of the heat exchange mechanism is reduced to reduce water resistance, reduce the influence of the condensation heat exchange process on the cold medium flow rate, and improve the user experience. When the cold medium flow rate is large, the user experience can be guaranteed. At this time, the effective path of the heat exchange mechanism is increased (or the effective path of the heat exchange mechanism is maintained at a larger effective path) to improve the heat exchange efficiency, make full use of the flue gas temperature, and save energy. On the other hand, when the flue gas temperature is high, the flue gas contains more heat energy. At this time, the effective path of the heat exchange mechanism is increased (or the effective path of the heat exchange mechanism is maintained at a larger effective path) to improve the heat exchange efficiency, make full use of the flue gas temperature, and save energy. When the delay temperature is low, the flue gas contains less heat energy. At this time, reducing the effective path of the heat exchange mechanism can reduce water resistance and improve user experience while ensuring that the flue gas heat energy is fully utilized.

[0053] In a third aspect, the utility model further provides a water heater, comprising:

[0054] case;

[0055] A smoke exhaust mechanism is disposed in the housing;

[0056] The condensing water heat exchanger or the condensing heat exchange system as described above is arranged in the shell, the smoke inlet of the body of the condensing heat exchanger in the condensing heat exchange system is detachably and sealedly connected to the outlet of the smoke exhaust mechanism, and the smoke exhaust port of the body of the condensing heat exchanger is connected to the outside;

[0057] A cold water inlet mechanism is arranged on the shell, and a water outlet of the cold water inlet mechanism is connected to a cold medium inlet of the condensing heat exchanger;

[0058] The main heat exchanger is arranged in the shell, and the water inlet end of the main heat exchanger is connected to the cold medium outlet of the condensing heat exchanger.

[0059] Beneficial effects: The water heater of the utility model includes the above-mentioned condensation heat exchange system, and has the same beneficial effects as the above-mentioned condensation heat exchange system, so it is not repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0061] Figure 1 It is an overall schematic diagram of the condensing heat exchanger of the utility model;

[0062] Figure 2 It is a cross-sectional view of the condensing heat exchanger of the utility model;

[0063] Figure 3 This is an exploded schematic diagram of the condensing heat exchanger of the utility model;

[0064] Figure 4 This is a schematic diagram of the utility model water heater;

[0065] Figure 5 The utility model is a flow chart of the heat exchange control method.

[0066] Figure 6 This is an overall schematic diagram of a condensing heat exchanger according to another embodiment of the utility model;

[0067] Figure 7 A cross-sectional view of a condensing heat exchanger according to another embodiment of the present invention Figure 1 ;

[0068] Figure 8 A cross-sectional view of a condensing heat exchanger according to another embodiment of the present invention Figure 2 ;

[0069] Fig. 9 This is an exploded schematic diagram of a condensing heat exchanger according to another embodiment of the utility model;

[0070] Fig.10 This is a schematic diagram of a water heater according to another embodiment of the present utility model.

[0071] Description of reference numerals:

[0072] 1. Main body; 101. Main body smoke inlet; 102. Main body smoke outlet; 103. Cold medium inlet; 104. Cold medium outlet; 105. First cold medium channel; 106. Second cold medium channel; 107. Smoke exhaust pipe;

[0073] 108, cover plate; 109, first mounting protrusion; 110, second mounting protrusion; 111, mounting buckle plate; 112, mounting groove; 113, body protrusion; 114, sealing slot;

[0074] 201, smoke guide and exhaust port; 202, smoke guide cavity; 203, limiting rib;

[0075] 301, condensate outlet; 302, water diversion slope; 303, condensate outlet joint;

[0076] 4. Sealing component; 401. Sealing surface; 402. Assembly groove; 403. Outer wall of sealing component;

[0077] 5. Electric two-way valve; 501. Channel switching component; 502. Sliding slot; 503. Water inlet slot;

[0078] 6. Shell;

[0079] 7. Main heat exchanger;

[0080] 8. Exhaust pipe assembly;

[0081] 9. Cold water inlet pipeline;

[0082] 10. Cold water outlet pipeline;

[0083] 11. Domestic hot water outlet pipeline;

[0084] 12. Condensate discharge pipeline;

[0085] 13. Gas pipeline;

[0086] 14. Heat exchange coil;

[0087] 15. Temperature detection device. DETAILED DESCRIPTION

[0088] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0089] The exhaust outlet of a conventional gas water heater is directly connected to the exhaust pipe assembly, and the high-temperature flue gas is discharged to the outdoors or a public flue through the exhaust pipe assembly. The high-temperature flue gas has high thermal energy, and directly discharging the high-temperature flue gas will cause a waste of thermal energy.

[0090] The condensing heat exchangers on the market are generally installed inside gas water heaters, forming condensing gas water heater products. If users who have already used conventional gas water heaters want to save energy and improve thermal efficiency, they can only replace the conventional gas water heaters with condensing gas water heaters. The replacement cost is high, the replacement process is cumbersome, and it will also affect the normal use of users.

[0091] Based on this, a condensing heat exchanger, a condensing heat exchange system, a water heater and a heat exchange control method of the present invention are proposed.

[0092] Combine the following Figure 1-Figure 10 , describing embodiments of the utility model of a condensing heat exchanger, a condensing heat exchange system, a water heater and a heat exchange control method.

[0093] According to an embodiment of the utility model, in a first aspect, a condensing heat exchanger is provided, comprising: a main body 1, a heat exchanging mechanism, a connecting mechanism and a smoke guiding mechanism, the main body 1 having a main body smoke inlet 101 at the bottom and a main body smoke exhaust port 102 at the top; the heat exchanging mechanism is arranged in the main body 1, and the heat exchanging mechanism is used to exchange heat for a cold medium circulating inside the main body; the connecting mechanism is arranged at the main body smoke inlet 101, and the main body smoke inlet 101 is detachably and sealably connected to an outlet of a smoke exhaust mechanism of a gas heating and heating equipment through the connecting mechanism; the smoke guiding mechanism is arranged in the main body 1, and the smoke guiding mechanism is located between the main body smoke inlet 101 and the main body smoke exhaust port 102, and the smoke guiding mechanism is used to change the flow direction of the smoke entering the main body 1 from the main body smoke inlet 101.

[0094] The smoke inlet 101 of the main body of this condensing heat exchanger is arranged at the bottom of the main body, and the smoke inlet 101 of the main body has a connecting mechanism, which is convenient for the installation and connection of the condensing heat exchanger and the smoke exhaust mechanism outlet of the gas heating equipment (such as a conventional gas water heater). The conventional gas water heater can be easily modified to add a condensing heat exchanger, thereby improving the thermal efficiency of the conventional gas water heater and saving energy. It is also easy to operate and does not affect the normal use of users.

[0095] In addition, the condensing heat exchanger of the utility model also has a smoke guiding mechanism. The smoke exhausted by the gas heating equipment enters the condensing heat exchanger body 1 from bottom to top. The smoke guiding mechanism can change the flow direction of the smoke entering the body from the smoke inlet 101 of the body, increase the path length of the smoke in the body 1, and increase the heat exchange time between the smoke and the cold medium in the heat exchange mechanism, thereby achieving full utilization of the thermal energy of the high-temperature smoke and further improving the thermal efficiency.

[0096] The body 1 is a bearing structure for the internal and external structures of the condensing water heater, has a certain structural strength, and is usually made of high temperature resistant and corrosion resistant materials, such as stainless steel or equivalent plastic, aluminum alloy, etc. The body 1 has a receiving cavity inside, which is used to set structures such as heat exchange mechanism and smoke guide mechanism.

[0097] In this embodiment, the main body 1 is a columnar structure as a whole, and the upper part of the main body 1 is the smoke exhaust pipe 107, which is also a columnar structure. Specifically, the smoke exhaust pipe 107 is a cylindrical structure, and the diameter of the upper part of the main body 1 is smaller than the diameter of the lower part, that is, the diameter of the smoke exhaust pipe 107 is smaller than the diameter of the lower part of the main body 1.

[0098] The height and diameter of the lower part of the main body 1 and the smoke exhaust pipe 107 can be set according to the use requirements, and this embodiment does not impose any limitation on this.

[0099] Of course, in other embodiments, the cross-sectional shapes of the main body 1 and the smoke exhaust pipe 107 perpendicular to the axial direction can be set as needed, such as triangle, rectangle, polygon, etc.

[0100] Specifically, the top of the lower half of the main body 1 is open, and the bottom of the smoke exhaust pipe 107 is provided with a cover plate 108, which is arranged around the bottom of the smoke exhaust pipe 107, and the outer diameter of the cover plate 108 matches the inner diameter of the top opening of the lower half of the main body 1, and the cover plate 108 is suitable for covering the top opening of the lower half of the main body 1.

[0101] The upper edge of the lower half of the main body 1 is formed with a plurality of mounting grooves 112, which are arranged at intervals. Correspondingly, the outer edge of the cover plate 108 has a plurality of first mounting protrusions 109, which are arranged at intervals, and the positions of the mounting grooves 112 and the first mounting protrusions 109 correspond one to one. The first mounting protrusions 109 are suitable for being inserted into the mounting grooves 112 to realize the installation of the cover plate 108 and the lower half of the main body 1.

[0102] The bottom of the body 1 has a body smoke inlet 101, and the top has a body smoke outlet 102. The smoke is suitable for entering the body 1 from the body smoke inlet 101 and then being discharged from the body smoke outlet 102. The flow direction of the smoke is as follows: Figure 2 and Figure 3 As shown by the arrows B and B' in the middle. The main body smoke inlet 101 is formed by enclosing the smoke exhaust pipe 107, and the internal accommodating cavity of the main body 1 is connected with the outside through the main body smoke inlet 101 and the main body smoke exhaust port 102. The inner diameters of the main body smoke inlet 101 and the main body smoke exhaust port 102 can be the same or different, but in order to ensure smooth smoke discharge, the inner diameters of the main body smoke inlet 101 and the main body smoke exhaust port 102 should be relatively close. In the present embodiment, the inner diameter of the main body smoke inlet 101 is slightly larger than the inner diameter of the main body smoke exhaust port 102. The main body smoke inlet 101 and the main body smoke exhaust port 102 are arranged in parallel in the axial direction, and preferably, the main body smoke inlet 101 and the main body smoke exhaust port 102 coincide in the axial direction.

[0103] The body 1 is also provided with a cold medium inlet 103 and a cold medium outlet 104 arranged in parallel with the axial direction. The cold medium inlet 103 and the cold medium outlet 104 are both connected to the heat exchange mechanism. The cold medium is suitable for entering the heat exchange mechanism from the cold medium inlet 103, and then flowing out from the cold medium outlet 104 after heat exchange with the high-temperature flue gas. The flow direction of the cold medium is as follows: Figure 2 and Figure 3 As shown by arrows A and A' in the middle. In this embodiment, the cold medium is cold water, specifically tap water.

[0104] In this embodiment, the cold medium inlet 103 and the cold medium outlet 104 are arranged on the side wall of the body 1. Specifically, the side wall of the body 1 is formed with a U-shaped notch, the upper end of the U-shaped notch is open, and the outer wall of the U-shaped notch protrudes from the side wall of the body 1 to form a body protrusion 113. A sealing groove 114 is formed between the body protrusion 113 and the side wall of the body 1. The mounting plate 111 is suitable for inserting into the sealing groove 114. The cold medium inlet 103 and the cold medium outlet 104 are both arranged on the mounting plate 111. The mounting plate 111 is suitable for inserting into the sealing groove 114 and tightly installing to prevent smoke leakage.

[0105] The outer edge of the cover plate 108 also has a second mounting protrusion 110 , the size of which matches the size of the upper opening of the U-shaped notch. The second mounting protrusion 110 can seal the upper opening of the U-shaped notch to prevent smoke leakage.

[0106] The axial directions of the cold medium inlet 103 and the cold medium outlet 104 are perpendicular to the axial directions of the main body smoke inlet 101 and the main body smoke outlet 102. The above structure fully utilizes the space on the main body 1, avoids interference between connecting pipes, and facilitates the arrangement of the pipe structure.

[0107] The heat exchange mechanism is used to exchange heat with the cold medium circulating inside it, that is, to use the heat energy contained in the flue gas to exchange heat with the cold water circulating inside it.

[0108] Furthermore, the heat exchange mechanism includes a heat exchange coil 14, which is spirally wound in the body 1. The heat exchange coil 14 is a pipe structure with a certain inner diameter, and its interior is suitable for the circulation of fluid substances such as water. The specific inner diameter of the heat exchange coil 14 can be selected and set according to actual use needs, and this embodiment does not limit this. The axial direction of the heat exchange coil 14, that is, its height direction, is parallel to or coincides with the axial direction of the body 1.

[0109] In addition, for the convenience of molding and installation, the heat exchange coil 14 is preferably made of metal material, such as stainless steel. The heat exchange coil 14 is spirally wound, and the spiral direction of the heat exchange coil 14 can be counterclockwise or clockwise, which is not limited in this embodiment.

[0110] Each spiral winding of the heat exchange coil 14 forms a circle of coils, and several circles of coils are arranged in parallel. Preferably, adjacent coils are arranged in parallel and closely, so that the structure of the heat exchange coil 14 is more compact.

[0111] The shape of each coil can be circular, rectangular, triangular, polygonal, etc., and can be selected and set according to the use requirements and the installation space. In this embodiment, in order to facilitate processing and subsequent installation and connection, the shape of the coil is circular, that is, the cross-sectional shape of the heat exchange component formed perpendicular to the axial direction is circular.

[0112] Furthermore, in order to facilitate the structural setting, the diameter of the heat exchange coil 14 should be smaller than the inner diameter of the body 1, that is, there should be a certain distance between the heat exchange coil 14 and the inner wall of the body 1 to provide a space for accommodating the high-temperature flue gas, so as to improve the heat exchange efficiency of the high-temperature flue gas. In addition, the height of the heat exchange mechanism is smaller than the height of the body 1, so that the heat exchange mechanism can be placed in the body 1.

[0113] The heat exchange coil 14 has a water inlet pipe end and a water outlet pipe end. The water inlet pipe end is connected to the cold medium inlet 103 , and the water outlet pipe end is connected to the cold medium outlet 104 .

[0114] The connecting mechanism is used to realize a detachable and sealed connection between the condensing heat exchanger and the gas heating equipment, that is, the smoke inlet 101 of the main body is detachably and sealedly connected to the smoke exhaust mechanism outlet of the gas heating equipment through the connecting mechanism.

[0115] Furthermore, the connection mechanism may be a plug-in connection mechanism, a clamp connection mechanism, or a spiral connection mechanism. In this embodiment, the connection mechanism is a plug-in connection mechanism, that is, the smoke inlet 101 of the main body is plug-in connected to the smoke exhaust mechanism outlet of the gas heating equipment, and the diameter of the smoke inlet 101 of the main body matches the diameter of the smoke exhaust mechanism outlet.

[0116] Furthermore, the connection mechanism includes a sealing component 4, which is used to seal the gap between the main body smoke inlet 101 and the smoke exhaust mechanism outlet to ensure the sealing between the main body smoke inlet 101 and the smoke exhaust mechanism outlet to avoid leakage of high-temperature smoke.

[0117] Specifically, the sealing component 4 adopts a sealing ring, and the sealing component 4 includes a sealing surface 401, an assembly groove 402 and a sealing component outer wall 403. The upper end of the assembly groove 402 is open, and the lower edge of the body 1 (the edge of the body smoke inlet 101) is inserted into the assembly groove 402. The sealing component outer wall 403 is placed on the outer wall of the body 1, and the sealing component outer wall 403 protrudes from the outer wall of the body 1, thereby realizing the installation of the sealing component 4 and the body 1. When the body smoke inlet 101 is plugged into the smoke exhaust mechanism outlet, the sealing surface 401 contacts the outer wall of the smoke exhaust mechanism outlet to ensure the sealing between the body smoke inlet 101 and the smoke exhaust mechanism outlet to prevent smoke leakage.

[0118] Furthermore, the smoke guiding mechanism is arranged near the smoke inlet 101 of the main body, so that the smoke can be guided by the smoke guiding mechanism as soon as it enters the main body 1 from the smoke inlet 101 of the main body, changing the flow direction, increasing the path length of the smoke in the main body 1, and increasing the heat exchange time between the smoke and the cold medium in the heat exchange mechanism, thereby achieving full utilization of the thermal energy of the high-temperature smoke and further improving the thermal efficiency.

[0119] The smoke guiding mechanism includes a smoke inlet and a smoke exhaust port 201. The smoke inlet direction of the main body smoke inlet 101 is perpendicular to the smoke exhaust direction of the smoke exhaust port 201, so that the flow direction of the smoke entering the main body 1 from the main body smoke inlet 101 can be changed by nearly 90°, so that the smoke flow path is maximized, the heat exchange is most complete, and the thermal efficiency is highest.

[0120] Furthermore, the smoke guiding mechanism includes a smoke guiding cavity 202, which is a columnar structure, preferably a cylindrical structure, and the radial dimension of the smoke guiding cavity 202 is smaller than the inner diameter dimension of the main body 1. In the present embodiment, the axial direction of the smoke guiding cavity 202 is arranged parallel to the axial direction of the main body 1, preferably overlapping.

[0121] Specifically, the bottom of the smoke guiding cavity 202 is connected to the bottom of the main body 1, and the bottom of the smoke guiding cavity 202 has a smoke guiding inlet, and a smoke guiding exhaust port 201 is arranged on the side wall of the smoke guiding cavity 202. The smoke guiding inlet is the main body smoke inlet 101, and the smoke guiding exhaust port 201 is arranged near the top of the smoke guiding cavity 202. In the present embodiment, four smoke guiding exhaust ports 201 are arranged, and the four smoke guiding exhaust ports 201 are evenly spaced along the circumferential direction on the side wall of the smoke guiding cavity 202, and the four smoke guiding exhaust ports 201 are arranged opposite to each other in pairs.

[0122] The smoke enters the smoke guiding cavity 202 from the smoke guiding inlet, and then enters the space between the outer wall of the smoke guiding cavity 202 and the inner wall of the body 1 from the smoke guiding exhaust port 201. The smoke then continues to flow upward and finally exits the body 1 from the body exhaust port 102.

[0123] The inner wall of the smoke guide cavity 202 is provided with a limiting rib 203, which is arranged in a ring shape along the inner wall of the smoke guide cavity 202, and the limiting rib 203 protrudes from the inner wall of the smoke guide cavity. After the smoke exhaust mechanism outlet of the gas heating equipment is inserted into the smoke inlet 101 of the body, the top of the smoke exhaust mechanism outlet abuts against the limiting rib 203 and is inserted into place, so as to prevent the top of the smoke exhaust mechanism outlet from being inserted into the transition and blocking the smoke guide and exhaust port 201, thereby affecting smoke emission.

[0124] Furthermore, part of the structure of the heat exchange mechanism is arranged between the inner wall of the body 1 and the outer wall of the smoke guide cavity 202. There is a spacing space between the inner wall of the body 1 and the outer wall of the smoke guide cavity 202. Arranging part of the structure of the heat exchange mechanism between the inner wall of the body 1 and the outer wall of the smoke guide cavity 202 can make full use of the internal space of the body 1, which is beneficial to the structural layout. In addition, in order to circulate the flue gas inside the body 1, make the heat exchange of the cold medium uniform and facilitate the discharge of condensed water, the bottom of the heat exchange mechanism does not contact the bottom of the body 1.

[0125] Furthermore, the condensate heat exchanger of this embodiment also includes a condensate discharge mechanism, which is arranged on the main body 1. The condensate discharge mechanism is used to discharge the condensate generated by the heat exchange in the main body 1 to avoid the accumulation of condensate in the main body 1 and affect the subsequent heat exchange process of the cold medium. Moreover, since the condensate is acidic water, the condensate is discharged from the main body 1 in time, which can reduce the corrosion of the internal structure of the main body 1 by the acidic condensate and extend its service life.

[0126] During the heat exchange process, condensed water will be generated on the outer wall of the heat exchange coil 14 of the heat exchange mechanism, and the condensed water will be discharged through the condensed water discharge mechanism after being collected. A part of the heat exchange coil 14 structure is provided above the smoke guide cavity 202, and the top of the smoke guide cavity 202 is closed to prevent the condensed water from dripping into the smoke guide cavity 202, so as not to affect the normal operation of the gas water heater and cause corrosion.

[0127] Furthermore, the condensate discharge mechanism includes a condensate discharge port 301, which is arranged on the side wall of the bottom of the body 1 and communicated with the inside of the body 1. A water diversion structure is arranged at the bottom of the body 1 near the condensate discharge port 301. By arranging the water diversion structure, the condensate can be discharged from the body more timely and smoothly.

[0128] In order to allow the condensed water to be discharged smoothly and not flow downward along the outer wall of the main body 1 , a condensed water outlet joint 303 is plugged into the condensed water outlet 301 .

[0129] Furthermore, the water diversion structure includes a water diversion slope 302, which slopes downward from a side away from the condensed water outlet 301 toward a side close to the condensed water outlet 301. This water diversion slope is inclined at the bottom of the body 1, and can guide the condensed water to the condensed water outlet 301, so as to achieve timely and thorough discharge of the condensed water.

[0130] Furthermore, the condensing heat exchanger of this embodiment also includes a heat exchange gear adjustment mechanism, which is disposed on the main body 1 and is used to adjust the effective heat exchange path of the heat exchange mechanism.

[0131] The effective heat exchange path of the heat exchange mechanism refers to the path that the cold medium (such as cold water) actually flows in the heat exchange mechanism. Under the condition of a certain water flow rate, the longer the effective heat exchange path is, the longer the heat exchange time of the cold water in the heat exchange mechanism is, the more fully the heat exchange with the flue gas heat energy is, and accordingly, the greater the water resistance of the pipeline is; conversely, the shorter the effective heat exchange path is, the shorter the heat exchange time of the cold water in the heat exchange mechanism is, the less fully the heat exchange between the cold water and the flue gas heat energy is, and accordingly, the smaller the water resistance of the pipeline is.

[0132] Furthermore, the heat exchange gear adjustment mechanism adjusts the effective heat exchange path of the heat exchange mechanism by changing the height position of the cold medium entering the heat exchange mechanism.

[0133] After the cold medium enters the heat exchange mechanism, it will flow downward under the action of gravity. The height position at which the cold medium enters the heat exchange mechanism determines the distance the cold medium flows in the heat exchange mechanism. The longer the distance the cold medium flows in the heat exchange mechanism, the more complete the heat exchange, the greater the water resistance, and the smaller the water flow rate, and vice versa. The effective heat exchange path of the heat exchange mechanism can be adjusted by changing the height position at which the cold medium enters the heat exchange mechanism. The adjustment method is simple and the adjustment effect is significant.

[0134] Specifically, the heat exchange mechanism is formed by spirally winding the heat exchange coil 14, and each circle of the coil is closely arranged along the height direction (axial direction) of the heat exchange mechanism. Taking the heat exchange mechanism with five layers of coils in the figure as an example, the five layers of coils are the first layer of coils, the second layer of coils, the third layer of coils, the fourth layer of coils and the fifth layer of coils from bottom to top. Under the condition of constant water flow velocity, when cold water flows through the three layers of coils below (the third layer coil, the second layer coil, and the first layer coil in sequence) and when cold water flows through all five layers of coils in sequence (the fifth layer coil, the fourth layer coil, the third layer coil, the second layer coil, and the first layer coil in sequence), the effective heat exchange path is shorter when cold water flows through the three layers of coils below, the heat exchange time of cold water in the heat exchange mechanism is shorter, the heat exchange between cold water and flue gas is less sufficient, and accordingly, the water resistance of the pipeline is smaller, while when cold water flows through all five layers of coils, the effective heat exchange path is longer, the heat exchange time of cold water in the heat exchange mechanism is longer, the heat exchange between cold water and flue gas is sufficient, and accordingly, the water resistance of the pipeline is larger. Therefore, the effective heat exchange path of the heat exchange mechanism can be conveniently adjusted by changing the height position of the cold medium entering the heat exchange mechanism.

[0135] Furthermore, the heat exchange gear adjustment mechanism includes a first cold medium channel 105 and a second cold medium channel 106 arranged on the side wall of the main body 1, the first cold medium channel 105 and the second cold medium channel 106 respectively correspond to different height positions of the heat exchange mechanism, and the two ends of the first cold medium channel 105 and the second cold medium channel 106 are respectively connected to the heat exchange mechanism and the cold medium inlet 103 of the main body 1.

[0136] The first cold medium channel 105 and the second cold medium channel 106 are used to connect the heat exchange mechanism and the cold medium inlet 103 of the body 1. The first cold medium channel 105 and the second cold medium channel 106 can be straight channels or channels of other shapes, as long as they can connect the heat exchange mechanism and the cold medium inlet 103. When the first cold medium channel 105 and the second cold medium channel 106 are both straight channels, the axes of the two can be parallel or non-parallel.

[0137] In this embodiment, if Figure 2As shown, a first cold medium channel 105 and a second cold medium channel 106 are provided on the side wall of the body 1 , the first cold medium channel 105 and the second cold medium channel 106 are both straight channels and the axes of the two are parallel, and the first cold medium channel 105 and the second cold medium channel 106 are both arranged perpendicular to the axis of the body 1 .

[0138] Furthermore, the first cold medium channel 105 and the second cold medium channel 106 are arranged in sequence from top to bottom along the height direction of the heat exchange mechanism. The first cold medium channel 105 corresponds to the first gear heat exchange (full gear) of the condensing heat exchanger, and the second cold medium channel 106 corresponds to the second gear heat exchange of the condensing heat exchanger.

[0139] In this embodiment, the first cold medium channel 105 is connected to the fifth layer of coils of the heat exchange mechanism, and the second cold medium channel 106 is connected to the third layer of coils of the heat exchange mechanism.

[0140] Furthermore, the heat exchange gear adjustment mechanism also includes a channel switch structure, which is arranged at the channel entrances of the first cold medium channel 105 and the second cold medium channel 106, and the channel switch structure is used to control the opening / closing of the first cold medium channel 105 and the second cold medium channel 106.

[0141] The channel switch structure is used to control the opening / closing of the first cold medium channel 105 and the second cold medium channel 106 , thereby adjusting the effective heat exchange path of the heat exchange mechanism.

[0142] Further, the channel switch structure includes a channel switching component 501. When the channel switching component 501 opens the first cold medium channel 105, the second cold medium channel 106 is closed. When the channel switching component 501 opens the second cold medium channel 106, the first cold medium channel 105 is closed. In addition, the channel switching component 501 is movably disposed between the channel entrances of the first cold medium channel 105 and the second cold medium channel 106 and the cold medium inlet 103 along the height direction of the heat exchange mechanism.

[0143] In this embodiment, an electric two-way valve 5 is arranged at the position of the cold medium inlet 103 on the side wall of the main body 1. The electric two-way valve 5 has a water inlet groove 503 inside. The water inlet groove 503 is continuously connected with the cold medium inlet 103. The water inlet groove 503 is parallel to the axial direction of the first cold medium channel 105 and the second cold medium channel 106. The electric two-way valve 5 also has a positioning groove 502 inside. The positioning groove 502 is movably arranged along the axial direction of the main body 1, and the channel switching component 501 is arranged in the positioning groove 502. When the channel switching component 501 moves downward to the bottom of the row slot 502, the water inlet slot 503 is connected with the first cold medium channel 105, and the cold water entering the water inlet slot 503 from the cold medium inlet 103 enters the heat exchange mechanism through the first cold medium channel 105; when the channel switching component 501 moves upward to the top of the row slot 502, the water inlet slot 503 is connected with the second cold medium channel 106, and the cold water entering the water inlet slot 503 from the cold medium inlet 103 enters the heat exchange mechanism through the second cold medium channel 106, thereby realizing the adjustment of the effective heat exchange path of the heat exchange mechanism.

[0144] Furthermore, the condensing heat exchanger of this embodiment further includes a temperature detection device 15 , which is disposed on the body 1 and is used to detect the flue gas temperature in the body 1 .

[0145] In this embodiment, the temperature detection device 15 is disposed on the top of the body 1 . The temperature detection device 15 adopts a temperature sensor. The detection probe of the temperature detection device 15 is placed in the body 1 and can detect the smoke temperature inside the body 1 .

[0146] The present embodiment also provides a condensing heat exchange system, comprising: a cold medium flow detection device, the above-mentioned condensing heat exchanger and a controller, wherein the cold medium flow detection device is used to detect the flow of the cold medium, the signal input end of the controller is connected to the signal output end of the cold medium flow detection device, the signal output end of the controller is connected to the signal input end of the heat exchange gear adjustment mechanism of the condensing heat exchanger, and the controller controls the heat exchange gear adjustment mechanism to adjust the effective heat exchange path of the heat exchange mechanism according to the cold medium flow detected by the cold medium flow detection device.

[0147] This condensing heat exchange system can adjust the effective heat exchange path of the heat exchange mechanism according to the actual operation of the gas heating equipment, that is, the flow rate of the cold medium. When the flow rate of the cold medium is small, the user experience is not good. At this time, the effective heat exchange path of the heat exchange mechanism is reduced to reduce water resistance, reduce the impact of the condensation heat exchange process on the flow rate of the cold medium, and improve the user experience; when the flow rate of the cold medium is large, the user experience can be guaranteed. At this time, the effective path of the heat exchange mechanism is increased (or the effective path of the heat exchange mechanism is maintained larger) to improve the heat exchange efficiency, make full use of the flue gas temperature, and save energy.

[0148] In this embodiment, the cold medium flow detection device is a water flow sensor, and the water flow sensor is arranged in a gas heating equipment (such as a gas water heater).

[0149] Furthermore, the signal input end of the controller is also connected to the signal output end of the temperature detection device 15 in the condensing heat exchanger. The controller controls the heat exchange gear adjustment mechanism to adjust the effective heat exchange path of the heat exchange mechanism according to the cold medium flow rate and the flue gas temperature detected by the temperature detection device 15.

[0150] The condensing heat exchange system of this embodiment can also adjust the effective heat exchange path of the heat exchange mechanism according to the flue gas temperature in the condensing heat exchanger, that is, consider both the cold medium flow rate and the flue gas temperature at the same time.

[0151] When the flue gas temperature is high, the flue gas contains more heat energy. At this time, the effective path of the heat exchange mechanism is increased (or the effective path of the heat exchange mechanism is maintained at a larger value) to improve the heat exchange efficiency, make full use of the flue gas temperature, and save energy. When the extended temperature is low, the flue gas contains less heat energy. At this time, reducing the effective path of the heat exchange mechanism can reduce water resistance and improve user experience while ensuring that the flue gas heat energy is fully utilized.

[0152] like Figure 4 As shown, this embodiment also provides a water heater, including: a shell 6, a smoke exhaust mechanism (fan), the above-mentioned condensing heat exchange system, a cold water inlet mechanism and a main heat exchanger 7, the smoke exhaust mechanism is arranged in the shell 6, the condensing heat exchange system is arranged above the outside of the shell 6, the main smoke inlet 101 of the condensing heat exchanger in the condensing heat exchange system is detachably and hermetically connected with the outlet of the smoke exhaust mechanism of the water heater, the main smoke exhaust port 102 of the condensing heat exchanger is connected to the outside, the cold water inlet mechanism is arranged in the shell 6, the water outlet end of the cold water inlet mechanism is connected to the cold medium inlet 103 of the condensing heat exchanger, the main heat exchanger 7 is arranged in the shell 6, and the water inlet end of the main heat exchanger is connected to the cold medium outlet 104 of the condensing heat exchanger.

[0153] Furthermore, the smoke exhaust port 102 of the main body of the condensing heat exchanger is connected to the smoke exhaust pipe assembly 8 to achieve communication with the outside world and discharge the smoke after heat exchange.

[0154] In this embodiment, the water heater is specifically a gas water heater, which belongs to a gas heating device. The shell 6 is the bearing structure of the water heater, and the interior of the shell 6 has a containing space. The interior and exterior of the shell 6 are provided with structural components necessary for the water heater. The shell 6 has sufficient structural strength. The shell 6 is usually made of metal material. For the sake of beauty, the shell 6 is usually in the shape of a cuboid.

[0155] The cold water inlet mechanism includes a cold water inlet pipeline 9, the water inlet end of the cold water inlet pipeline 9 is connected to the tap water network, and the water outlet end of the cold water inlet pipeline 9 is connected to the cold medium inlet 103. Tap water (cold water) enters the heat exchange coil 14 from the cold water inlet pipeline 9, and then absorbs the heat of the high-temperature flue gas in the condensing heat exchanger body 1, so that the temperature of the water increases. This process is an auxiliary heat exchange process.

[0156] The main heat exchanger 7 is arranged inside the water heater housing 6, and the water inlet end of the main heat exchanger is connected to the cold medium outlet 104 through the cold water outlet pipe 10. The water that has undergone auxiliary heat exchange in the condensing heat exchanger flows to the main heat exchanger 7 through the cold water outlet pipe 10 to perform the main heat exchange process, further increasing the water temperature to meet the user's use needs. The heated water is discharged through the domestic hot water outlet pipe 11 for user use.

[0157] Since the water entering the main heat exchanger 7 is no longer cold water, but warm water with a certain temperature, when the main heat exchanger 7 further increases the water temperature, it can greatly save heating time and improve heating efficiency. At the same time, since the thermal energy of the high-temperature flue gas is fully utilized, the purpose of saving energy is achieved.

[0158] The condensed water generated during the auxiliary heat exchange process enters the condensed water outlet joint 303 from the condensed water outlet 301 and is then discharged to a designated location, such as a sewer, through the condensed water discharge pipeline 12 .

[0159] The shell 6 is also connected to a gas pipeline 13, which is connected to the burner of the water heater. The gas enters the burner for combustion. Since the process of using the gas for main heat exchange is the same as the prior art, it will not be described in detail.

[0160] The smoke exhaust mechanism includes a fan, and the exhaust gas (high-temperature smoke) discharged from the main heat exchanger 7 is drawn to the main smoke inlet 101 of the condensing heat exchanger through the fan, and then discharged to the outside from the main smoke exhaust port 102. The main smoke inlet 101 is detachably and sealably connected to the smoke exhaust mechanism outlet through a connecting mechanism, so that users can easily install a condensing heat exchanger on a conventional gas water heater. After installing the condensing heat exchanger of this embodiment, the conventional gas water heater has auxiliary heat exchange capacity, greatly improves the heat exchange efficiency, and achieves environmental protection and energy saving.

[0161] The controller is arranged in the housing 6, and is also used to receive user instructions and control the entire working process of the water heater.

[0162] The water heater is also provided with a cold medium flow detection device, namely a water flow sensor, for detecting the water flow.

[0163] like Figure 5 As shown, this embodiment also provides a heat exchange control method, which is applied to the above-mentioned condensation heat exchange system, and the heat exchange control method includes:

[0164] start up;

[0165] The condensing heat exchange system starts;

[0166] The condensing heat exchanger is in the first gear for heat exchange;

[0167] After startup, the condensing heat exchanger is in the first gear for heat exchange to fully utilize the thermal energy of the high-temperature flue gas and improve the heat exchange efficiency.

[0168] Get the cold medium flow rate q;

[0169] In this embodiment, the cold medium flow is the water flow, which is usually affected by the water pressure of the water pipe network. The cold medium flow detection device can detect the water flow. When the water flow is large, the user experience is good. If the water flow is too small, it will affect the user experience.

[0170] Determine whether the cold medium flow rate q is greater than the preset cold medium flow rate q0;

[0171] If yes, keep the first gear for heat exchange;

[0172] If not, switch to the second gear for heat exchange.

[0173] In this embodiment, a preset cold medium flow rate q0 is pre-set, and preferably, the preset cold medium flow rate q0 is 5L / min. It is determined whether the cold medium flow rate q is greater than the preset cold medium flow rate q0. If the cold medium flow rate q is greater than the preset cold medium flow rate q0, it means that the water flow rate is large, and the user experience is good at this time. The condensing heat exchanger can maintain the first gear heat exchange; if the cold medium flow rate q is less than or equal to the preset cold medium flow rate q0, it means that the water flow rate is small, and the user experience is not good at this time. The condensing heat exchanger should be switched to the second gear heat exchange to reduce the water resistance of the water channel, reduce the impact of the heat exchange process of the condensing heat exchanger on the water flow, and improve the user experience at this time.

[0174] Further, after the above step of if yes, maintaining the first gear for heat exchange, the method further includes:

[0175] Obtaining the flue gas temperature t in the body 1 of the condensing heat exchanger;

[0176] The temperature of the flue gas entering the condensing heat exchanger body 1 is not constant. When the flue gas temperature is high, it contains more heat energy. At this time, the effective heat exchange path of the heat exchange mechanism should be increased or maintained longer to improve the heat exchange efficiency. When the flue gas temperature is low, it contains less heat energy. At this time, the effective path of the heat exchange mechanism should be reduced. While ensuring that the flue gas heat energy is fully utilized, the water resistance can be reduced to improve the user experience.

[0177] Determine whether the flue gas temperature t is greater than the preset flue gas temperature t0;

[0178] If yes, keep the first gear for heat exchange;

[0179] If not, switch to the second gear for heat exchange.

[0180] In this embodiment, a preset flue gas temperature t0 is pre-set, and preferably, the preset flue gas temperature t0 is 60°C. Determine whether the flue gas temperature t is greater than the preset flue gas temperature t0. If the flue gas temperature t is greater than the preset flue gas temperature t0, it means that the flue gas temperature is relatively high. At this time, the first heat exchange gear should be maintained to make full use of the flue gas heat energy and improve the heat exchange efficiency; when the flue gas temperature t is less than or equal to the preset flue gas temperature t0, the heat energy contained is less, and the cold water does not need to flow a long distance in the heat exchange mechanism to absorb the flue gas temperature, that is, the effective heat exchange path of the heat exchange mechanism does not need to be long. At this time, switching to the second gear for heat exchange can reduce water resistance and improve user experience.

[0181] like Figure 6-Figure 10 As shown, it is a condensing heat exchanger of another embodiment of the utility model. The condensing heat exchanger of this embodiment is different from the previous embodiment in that: the condensing heat exchanger of this embodiment is not provided with a heat exchange gear adjustment mechanism, the cold medium inlet 103 is directly connected to the heat exchange mechanism, and the effective heat exchange path of the heat exchange mechanism is fixed and cannot be adjusted.

[0182] Since the water flow of the tap water network in some communities is large and relatively stable, there is no need to adjust the effective heat exchange path of the heat exchange mechanism to ensure the user's comfort and experience. In addition, the condensing heat exchanger does not have a heat exchange gear adjustment mechanism, which can reduce the controller's data calculation amount, reduce the control difficulty, and help reduce costs.

[0183] The main body smoke inlet 101 of the condensing heat exchanger of the present embodiment is arranged at the bottom of the main body 1, and the main body smoke inlet 101 has a connecting mechanism, which is convenient for the installation and connection of the condensing heat exchanger with the exhaust mechanism outlet of a conventional gas water heater. The conventional gas water heater can be easily modified to add a condensing heat exchanger, thereby improving the thermal efficiency of the conventional gas water heater and saving energy. It is also easy to operate and does not affect the normal use of the user.

[0184] Similarly, this embodiment also provides a water heater, including a shell 6, a smoke exhaust mechanism (fan), a condensing water heat exchanger of this embodiment, a cold water inlet mechanism and a main heat exchanger 7. The smoke exhaust mechanism is arranged in the shell 6, and the condensing heat exchange system is arranged above the shell 6. The main smoke inlet 101 of the condensing heat exchanger in the condensing heat exchange system is detachably and sealedly connected with the outlet of the smoke exhaust mechanism, and the main smoke exhaust port 102 of the condensing heat exchanger is connected to the outside world. The cold water inlet mechanism is arranged in the shell 6, and the water outlet end of the cold water inlet mechanism is connected to the cold medium inlet 103 of the condensing heat exchanger. The main heat exchanger 7 is arranged in the shell 6, and the water inlet end of the main heat exchanger is connected to the cold medium outlet 104 of the condensing heat exchanger.

[0185] Furthermore, the smoke exhaust port 102 of the main body of the condensing heat exchanger is connected to the smoke exhaust pipe assembly 8 to achieve communication with the outside world and discharge the smoke after heat exchange.

[0186] The water heater of this embodiment can fully utilize the heat of the exhausted high-temperature flue gas, has high thermal efficiency, and saves energy and use costs.

[0187] In other embodiments, the gas heating equipment may also be gas heating equipment, such as a wall-mounted boiler.

[0188] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A condensing heat exchanger, characterized in that: include: A body (1) having a body smoke inlet (101) at the bottom and a body smoke outlet (102) at the top; A heat exchange mechanism is arranged in the body (1), and is used to exchange heat with a cold medium circulating inside the body; A connecting mechanism is arranged at the main body smoke inlet (101), and the main body smoke inlet (101) is detachably and hermetically connected to an outlet of a smoke exhaust mechanism of a gas heating device via the connecting mechanism; A smoke guide mechanism is arranged in the body (1), and the smoke guide mechanism is located between the body smoke inlet (101) and the body smoke outlet (102), and the smoke guide mechanism is used to change the flow direction of smoke entering the body (1) from the body smoke inlet (101).

2. The condensing heat exchanger according to claim 1, characterized in that: The smoke guiding mechanism is arranged close to the smoke inlet (101) of the main body.

3. The condensing heat exchanger according to claim 1, characterized in that: The smoke guiding mechanism comprises a smoke guiding inlet and a smoke guiding exhaust port (201), wherein the smoke guiding inlet is the main body smoke inlet (101), and the smoke inlet direction of the main body smoke inlet (101) is perpendicular to the smoke exhaust direction of the smoke guiding exhaust port (201).

4. The condensing heat exchanger according to claim 3, characterized in that: The smoke guiding mechanism further comprises a smoke guiding cavity (202), the bottom of the smoke guiding cavity (202) being connected to the bottom of the body (1), and the bottom of the smoke guiding cavity (202) having the smoke guiding inlet, and the smoke guiding exhaust port (201) being arranged on the side wall of the smoke guiding cavity (202).

5. The condensing heat exchanger according to claim 4, characterized in that: Part of the structure of the heat exchange mechanism is arranged between the inner wall of the main body (1) and the outer wall of the smoke guide cavity (202).

6. The condensing heat exchanger according to claim 1, characterized in that: It also comprises a condensed water discharge mechanism, which is arranged on the main body (1) and is used to discharge condensed water generated by heat exchange in the main body (1).

7. The condensing heat exchanger according to claim 6, characterized in that: The condensate discharge mechanism comprises a condensate discharge outlet (301), wherein the condensate discharge outlet (301) is arranged on the side wall of the bottom of the main body (1) and is connected to the interior of the main body (1), and a water diversion structure is arranged at a position near the condensate discharge outlet (301) at the bottom of the main body (1).

8. The condensing heat exchanger according to claim 7, characterized in that: The water diversion structure comprises a water diversion slope (302), and the water diversion slope (302) slopes downward from a side away from the condensed water discharge outlet (301) toward a side close to the condensed water discharge outlet (301).

9. The condensing heat exchanger according to claim 1, characterized in that: The main body smoke inlet (101) and the main body smoke outlet (102) are axially parallel, and the main body (1) is further provided with a cold medium inlet (103) and a cold medium outlet (104) which are axially parallel, and the axial directions of the cold medium inlet (103) and the cold medium outlet (104) are perpendicular to the axial directions of the main body smoke inlet (101) and the main body smoke outlet (102).

10. The condensing heat exchanger according to claim 1, characterized in that: The connection mechanism is a plug-in connection mechanism, a clamp connection mechanism, or a spiral connection mechanism.

11. The condensing heat exchanger according to claim 10, characterized in that: The connection mechanism comprises a sealing component (4), and the sealing component (4) is used to seal the gap between the smoke inlet (101) of the main body and the outlet of the smoke exhaust mechanism.

12. The condensing heat exchanger according to any one of claims 1 to 11, characterized in that: It also comprises a heat exchange gear adjustment mechanism, which is arranged on the main body (1) and is used to adjust the effective heat exchange path of the heat exchange mechanism.

13. The condensing heat exchanger according to claim 12, characterized in that: The heat exchange gear adjustment mechanism adjusts the effective heat exchange path of the heat exchange mechanism by changing the height position at which the cold medium enters the heat exchange mechanism.

14. The condensing heat exchanger according to claim 13, characterized in that: The heat exchange gear adjustment mechanism comprises a first cold medium channel (105) and a second cold medium channel (106) arranged on the side wall of the body (1); the first cold medium channel (105) and the second cold medium channel (106) respectively correspond to different height positions of the heat exchange mechanism; and both ends of the first cold medium channel (105) and the second cold medium channel (106) respectively connect the heat exchange mechanism and the cold medium inlet (103) of the body (1).

15. The condensing heat exchanger according to claim 14, characterized in that: The first cold medium channel (105) and the second cold medium channel (106) are arranged in sequence from top to bottom along the height direction of the heat exchange mechanism, the first cold medium channel (105) corresponds to the first gear heat exchange of the condensing heat exchanger, and the second cold medium channel (106) corresponds to the second gear heat exchange of the condensing heat exchanger.

16. The condensing heat exchanger according to claim 14, characterized in that: The heat exchange gear adjustment mechanism also includes a channel switch structure, which is arranged at the channel entrances of the first cold medium channel (105) and the second cold medium channel (106), and the channel switch structure is used to control the opening / closing of the first cold medium channel (105) and the second cold medium channel (106).

17. The condensing heat exchanger according to claim 16, characterized in that: The channel switch structure comprises a channel switching component (501), and when the channel switching component (501) opens the first cold medium channel (105), the second cold medium channel (106) is closed; when the channel switching component (501) opens the second cold medium channel (106), the first cold medium channel (105) is closed.

18. The condensing heat exchanger according to claim 17, characterized in that: The channel switching component (501) is movably arranged along the height direction of the heat exchange mechanism between the channel entrances of the first cold medium channel (105) and the second cold medium channel (106) and the cold medium inlet (103).

19. The condensing heat exchanger according to claim 12, characterized in that: It also comprises a temperature detection device (15), wherein the temperature detection device (15) is arranged on the main body (1), and the temperature detection device (15) is used to detect the temperature of the smoke in the main body (1).

20. A condensation heat exchange system, characterized in that: include: Cold medium flow detection device; The condensing heat exchanger according to any one of claims 12 to 19; A controller, wherein a signal input end of the controller is connected to a signal output end of the cold medium flow detection device, and a signal output end of the controller is connected to a signal input end of a heat exchange gear adjustment mechanism of the condensing heat exchanger, and the controller controls the heat exchange gear adjustment mechanism to adjust an effective heat exchange path of the heat exchange mechanism according to the cold medium flow detected by the cold medium flow detection device.

21. The condensation heat exchange system according to claim 20, characterized in that: The signal input end of the controller is also connected to the signal output end of the temperature detection device (15) in the condensing heat exchanger, and the controller controls the heat exchange gear adjustment mechanism to adjust the effective heat exchange path of the heat exchange mechanism according to the cold medium flow rate and the flue gas temperature detected by the temperature detection device (15).

22. A water heater, characterized in that: include: Housing (6); A smoke exhaust mechanism is arranged in the housing (6); The condensing heat exchanger according to any one of claims 1 to 19 or the condensing heat exchange system according to claim 20 or 21, which is arranged on the housing (6), the main smoke inlet (101) of the condensing heat exchanger is detachably sealedly connected to the outlet of the smoke exhaust mechanism, and the main smoke exhaust port (102) of the condensing heat exchanger is connected to the outside; A cold water inlet mechanism is arranged on the housing (6), and a water outlet end of the cold water inlet mechanism is connected to a cold medium inlet (103) of the condensing heat exchanger; A main heat exchanger (7) is arranged in the shell (6), and a water inlet end of the main heat exchanger is connected to a cold medium outlet (104) of the condensing heat exchanger.

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