Spoiler structure and gas water heater with optimized resistance distribution

Abstract

A spoiler structure and a gas water heater for optimizing resistance distribution belong to the technical field of household appliances. In the spoiler structure, the spoiler is arranged between the fan and the heat exchanger, and the spoiler includes: a plurality of through smoke holes; a heat exchange flow channel arranged in the shell of the spoiler, and the heat exchange flow channel is respectively provided with a water inlet and a water outlet, and the heat exchange flow channel is connected with the water flow channel of the heat exchanger. The smoke through hole includes a resistance-reducing smoke through hole located in the first flow area, and the smoke outflow trajectory of the resistance-reducing smoke through hole points to the outflow port. The pre-heat-exchange spoiler structure can balance the flow resistance on the path of the heat exchanger flowing into the fan, and has the advantage of improving the heat exchange efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of household appliances, and in particular relates to a spoiler structure for optimizing resistance distribution and a gas water heater. Background Art

[0002] A gas water heater is a type of gas water heater that uses gas as fuel and transfers heat to cold water flowing through a heat exchanger through combustion heating to achieve the purpose of preparing hot water. For a gas water heater that uses a fan to extract air, the fan assembly guides the high-temperature flue gas generated by combustion to flow through the heat exchanger, to the smoke hood and be discharged, and on the other hand, provides sufficient oxygen for combustion; however, in this type of structure, the fan assembly is asymmetrically distributed in the gas flow path, which will cause uneven drainage of the fan.

[0003] In the prior art, a spoiler is usually provided to balance the drainage effect of the fan, but this will increase the gas flow resistance, which is not conducive to heat exchange and often leads to a decrease in heat exchange efficiency. When users use the water heater, the time waiting for hot water to come out will be extended, reducing the user's experience of the gas water heater. Summary of the invention

[0004] In order to solve the above technical problems, the present application further improves the spoiler-related structure inside the gas water heater, in order to improve the heat exchange efficiency on the basis of drainage balance. One of the purposes of the present invention is to provide a spoiler structure that optimizes the resistance distribution, and the second purpose is to provide a corresponding gas water heater.

[0005] The specific technical solution is described below:

[0006] A spoiler structure for optimizing resistance distribution, the spoiler is arranged between the fan and the heat exchanger, and the spoiler includes:

[0007] A plurality of through smoke holes;

[0008] A heat exchange flow channel is arranged in the shell side of the spoiler, the heat exchange flow channel is respectively provided with a water inlet and a water outlet, and the heat exchange flow channel is connected with the water flow channel of the heat exchanger;

[0009] a smoke collecting channel located between the smoke outlet of the heat exchanger and the air suction port of the fan, the smoke collecting channel including a first flow area located below the fan and other second flow areas, the smoke flows through the spoiler in the first flow area and then flows into the second flow area through the flow outlet;

[0010] The smoke through holes include resistance-reducing smoke through holes located in the first flow area, and smoke outflow trajectories of the resistance-reducing smoke through holes point to the outflow port.

[0011] In the above technical solution, since the first flow area is arranged below the fan, the smoke will be hindered by the lower surface of the fan when flowing upward in this area, that is, the fan constitutes the source of resistance in the first flow area, while there is no fan in the second flow area to hinder the flow of smoke. Therefore, the first flow area has a greater smoke flow resistance than the second flow area.

[0012] After the flue gas passes through the heat exchanger, the temperature is still around 100~200℃. By setting up a heat exchange flow channel, the waste heat of this part of the flue gas is absorbed to achieve water preheating. At the same time, the resistance-reducing flue gas holes pointing to the outflow port avoid the collision between the flue gas and the surface below the fan as much as possible, thereby reducing the flow resistance of the flue gas in the first flow area, making the flow distribution of the flue gas more balanced and improving the heat exchange efficiency.

[0013] Preferably, the drag-reducing smoke through hole has an inclined flow channel so as to point to the outflow port. Compared with the straight up and down smoke through hole, the inclined flow channel also prolongs the contact path and duration between the smoke and the spoiler, making the heat exchange more sufficient.

[0014] Preferably, the fan covers one side of the spoiler.

[0015] Further preferably, the inclination of the flow channel in the resistance-reducing smoke through hole gradually increases in the direction away from the outflow outlet, so as to more accurately point to the outflow outlet and avoid the smoke from colliding with the surface below the fan.

[0016] Preferably, an electric auxiliary heating device for heating is also included and is arranged in the heat exchange flow channel. The electric auxiliary heating device further heats the water, which can greatly reduce the time it takes for the water to be heated to the set temperature. Furthermore, on the basis of the spoiler realizing the drainage balancing function, the heating efficiency of the gas water heater and the user experience are improved.

[0017] Preferably, the electric auxiliary heating device includes a heating pipe arranged in the shell of the spoiler and a heating joint arranged outside the spoiler. Further preferably, the heating pipe is spiraled between a plurality of groups of smoke through holes to form a circuitous heating structure, so as to further increase the heating area and the contact area with water, heat quickly, and further reduce the waiting time of users.

[0018] Preferably, the fan is arranged above the spoiler and partially covers the spoiler, the exhaust direction of the fan is upward, and the heat exchanger is arranged below the spoiler. This arrangement facilitates the fan to exhaust air upward and forms an up and down arrangement direction.

[0019] Preferably, the smoke holes corresponding to the covered part of the fan have a larger aperture than the smoke holes at other places. Further preferably, the aperture of the smoke holes gradually decreases along the direction from the covered part to other places. Due to the covering, there is often a larger flow resistance at the covered part of the fan, and the smoke holes with larger apertures have relatively smaller flow resistance, which is convenient for balancing the flow distribution of the drainage gas.

[0020] Preferably, the outer wall of at least part of the smoke holes has a heat exchange portion for performing heat exchange with the heat exchange channel; further preferably, the heat exchange channel surrounds the outer wall of each of the smoke holes, and the outer wall of the smoke holes and the shell of the heat exchanger together form the flow area of ​​the heat exchange channel to obtain the largest possible heat exchange area and improve the heat exchange efficiency.

[0021] Preferably, the fan has an air suction port, a smoke collecting wall is provided between the air suction port and the upper surface of the spoiler, and the air suction port, the upper surface of the spoiler and the smoke collecting wall constitute the smoke collecting channel.

[0022] Preferably, the water inlet and the water outlet are respectively located on both sides of the spoiler, and form a circuitous heat exchange flow channel to extend the heat exchange time.

[0023] A gas water heater is provided with a spoiler structure as described in any of the above technical solutions.

[0024] In summary, the technical solution of the present invention has the following main beneficial effects:

[0025] Compared with the prior art, the technical solution of the present invention can improve the heat exchange efficiency and reduce the user's waiting time on the basis of the spoiler realizing the drainage balance function, thereby improving the user's experience;

[0026] Specifically, the uneven balance of smoke drainage comes from the obstruction of the fan in the first flow area, while there is no fan in the second flow area to hinder the flow of smoke. Therefore, the first flow area has a greater smoke flow resistance than the second flow area. In addition to absorbing the residual heat of the smoke and realizing the preheating of water, the resistance-reducing smoke through holes pointing to the outflow outlet also try to avoid the collision between the smoke and the surface below the fan in the first flow area, thereby reducing the flow resistance of the smoke in the first flow area, making the flow distribution of the smoke more balanced and improving the heat exchange efficiency.

[0027] Furthermore, the drag-reducing smoke through hole is set as an inclined flow channel, which is convenient for pointing to the outflow port. Compared with the straight up and down smoke through hole, the inclined flow channel also prolongs the contact path and duration between the smoke and the spoiler, making the heat exchange more sufficient.

[0028] Furthermore, the electric auxiliary heating device further heats the water, which can significantly reduce the time it takes for the water to be heated to the set temperature, thereby improving the heating efficiency of the gas water heater and the user experience based on the spoiler's drainage balance function;

[0029] Further or more detailed beneficial effects will be described in detail in conjunction with specific examples in the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the internal structure of a gas water heater with a spoiler structure having an electric auxiliary heating device according to an embodiment;

[0031] Figure 2 yes Figure 1 A schematic diagram of the structure of a smoke collecting channel formed by the fan and the smoke collecting wall;

[0032] Figure 3 is a schematic diagram of the internal structure of the spoiler described in the embodiment;

[0033] Figure 4 2 is a schematic diagram of the cross-sectional structure of the side portion of the spoiler described in the embodiment.

[0034] Reference numerals:

[0035] 1: spoiler, 1.1: smoke channel, 1.11: smoke resistance reduction hole, 1.2: heat exchange channel, 1.3: water inlet, 1.4: water outlet, 1.5: electric auxiliary heating device, 1.51: heating pipe, 1.52: heating joint;

[0036] 2: fan, 3: heat exchanger, 4: smoke collecting wall, 5: burner;

[0037] a: smoke collection channel, a.1: first circulation area, a.11: outflow port, a.2: second circulation area. DETAILED DESCRIPTION

[0038] The present invention is further explained with reference to the following embodiments:

[0039] The core technical problem faced by the technical solution of the embodiment of the present application comes from the inventor's accurate understanding of the prior art. Therefore, how to reduce the user's waiting time and improve the user's experience on the basis of realizing the drainage balance function of the spoiler is a technical problem that the inventor urgently needs to solve.

[0040] It should be noted that the embodiments do not constitute a limitation on the protection scope of the claims of the present invention. According to the technical concepts provided / proven by the embodiments, all technical solutions that can be reasonably anticipated by technicians in the relevant technical field should be included in the protection scope of the claims of the present invention.

[0041] The embodiments are described in detail as follows:

[0042] Please refer to the attached Figures 1 to 4 , this embodiment relates to a spoiler structure for optimizing resistance distribution, in which a fan 2 is arranged on one side above a spoiler 1 and covers the side of the spoiler 1, the fan 2 draws air upward, a heat exchanger 3 is arranged below the spoiler 1, a burner 5 is arranged below the heat exchanger 3, and hot air generated by the burner 5 flows to the spoiler 1 after heat exchange in the heat exchanger 3. This arrangement facilitates the fan 2 to draw air upward and forms an up-and-down arrangement direction;

[0043] The fan 2 has an air suction port, and a smoke collecting wall 4 is arranged between the air suction port and the upper surface of the spoiler 1. The air suction port, the upper surface of the spoiler 1 and the smoke collecting wall 4 constitute a smoke collecting channel a. In the smoke collecting channel a, the area covered by the fan 2 constitutes a first area a.1, and the other areas constitute a second circulation area a.2. The smoke flows through the spoiler 1 in the first circulation area a.1 and then flows to the second circulation area a.2 through the outflow port a.11.

[0044] Since the above-mentioned first flow area a.1 is arranged below the fan 2, the smoke will be hindered by the lower surface of the fan 2 when flowing upward in this area, that is, the fan 2 constitutes the source of resistance in the first flow area a.1, while there is no fan 2 in the second flow area a.2 to hinder the flow of smoke. Therefore, the first flow area a.1 has a greater smoke flow resistance than the second flow area a.2.

[0045] The above-mentioned spoiler 1 includes a plurality of array-arranged and interpenetrating flue gas through holes 1.1. A heat exchange flow channel 1.2 for circulating water is arranged in the shell side of the spoiler 1. An electric auxiliary heating device 1.5 for heating is arranged inside the heat exchange flow channel 1.2. The electric auxiliary heating device 1.5 includes a heating pipe 1.51 arranged in the shell side of the spoiler 1 and a heating joint 1.52 arranged outside the spoiler 1. The heating pipe 1.51 is spiraled between the plurality of groups of flue gas through holes 1.1 to form a circuitous heating structure, so as to further increase the heating area and the contact area with water, and heat quickly.

[0046] In this embodiment, the heat exchange channel 1.2 is provided with a water inlet 1.3 and a water outlet 1.4 on both sides of the spoiler 1, respectively, to form a circuitous heat exchange channel 1.2, so as to extend the water preheat exchange time as much as possible; preferably, the heat exchange channel 1.2 surrounds the outer wall of each flue gas through hole 1.1 to obtain the largest possible heat exchange area and improve the heat exchange efficiency.

[0047] The heat exchange channel 1.2 is connected to the water flow channel of the heat exchanger 3, and the preheated water flows into the heat exchanger 3 for further heat exchange.

[0048] Importantly, the smoke through hole 1.1 includes a resistance-reducing smoke through hole 1.11 located in the first flow area a.1. The smoke outflow trajectory of the resistance-reducing smoke through hole 1.11 points to the flow outlet a.11. The resistance-reducing smoke through hole 1.11 points to the flow outlet a.11 through an inclined flow channel. Compared with the straight up and down part of the smoke through hole 1.11, the inclined flow channel can extend the contact path and duration between the smoke and the spoiler 1, so that the heat exchange is more sufficient.

[0049] In the preferred technical solution, the inclination of the flow channel in the resistance-reducing smoke through hole 1.11 gradually increases in the direction away from the flow outlet a.11, so as to more accurately point to the flow outlet a.11 and avoid the smoke from colliding with the surface below the fan 2.

[0050] In the technical solution of this embodiment, after the flue gas passes through the heat exchanger 3, the temperature is still about 100-200°C. The heat exchange flow channel 1.2 is provided to absorb the residual heat of this part of the flue gas, thereby realizing the preheating of the water. At the same time, the resistance-reducing flue gas through hole 1.11 pointing to the flow outlet a.11 avoids the collision of the flue gas with the surface below the fan 2 as much as possible, thereby reducing the flow resistance of the flue gas in the first flow area a.1, balancing the distribution of the flue gas, and improving the heat exchange efficiency.

[0051] Furthermore, the electric auxiliary heating device 1.5 further heats the water, which can significantly reduce the time it takes for the water to be heated to the set temperature. On the basis of the spoiler 1 realizing the drainage balancing function, the heating efficiency of the gas water heater is improved, the user's waiting time is reduced, and the user experience is improved.

[0052] In a preferred embodiment, the smoke holes 1.1 corresponding to the covered part of the fan 2 - that is, the resistance-reducing smoke holes 1.11 - have a larger aperture relative to the smoke holes 1.1 at other locations, and the aperture of the smoke holes 1.1 gradually decreases along the direction from the covered part to other locations. In this embodiment, due to the covering of the fan 2, there is often a larger flow resistance at the covered part, and the smoke holes 1.1 with a larger aperture have a relatively smaller flow resistance, which is convenient for balancing the flow distribution of the drainage gas.

[0053] In a preferred embodiment, the spoiler 1 has a step portion that sinks toward the heat exchanger 3, and the spoiler 1 is located below the fan 2 in the horizontal direction, and a resistance reduction opening that is not covered by the spoiler 1 is formed in the first flow area a.1. In this embodiment, due to the cover of the fan 2, there is a large flow resistance above the first flow area a.1, so the resistance reduction opening is provided so that the area has a relatively small flow resistance, which is convenient for balancing the flow distribution of the drainage gas and making the gas flow smoother;

[0054] At the same time, in the technical solution of this embodiment, compared with the flat spoiler 1 of the same length, the sunken step portion can extend the flow distance and flow time of water in the heat exchange flow channel 1.2, and increase the contact area between the spoiler 1 and the flue gas, thereby obtaining a more sufficient heat exchange effect;

[0055] The sunken step portion can also prevent the positions of the spoiler 1 and the fan 2 from interfering with each other in the limited internal space of the water heater, and facilitate the arrangement of the spoiler 1. The step portion can extend to the bottom of the fan 2 to extend the length of the spoiler 1 as much as possible, increase the heat exchange area and the distance and duration of fluid flow, and further improve the heat exchange efficiency.

[0056] In a further preferred embodiment, a guide slope is formed at the sinking of the step portion, and the guide slope guides the smoke to flow upward. Due to the existence of the bottom surface of the fan 2, the smoke flows out through the bottom of the fan 2 in a lateral flow state. The lateral flow direction will interfere with the smoke flowing upward from the spoiler 1, which is not conducive to the smoke passing through the spoiler 1. Therefore, the guide slope is set in this embodiment. After the smoke flows out through the bottom of the fan 2, it first flows through the guide slope to change its flow direction, avoids its interference with the smoke flowing upward from the spoiler 1, and reduces the flow resistance of the smoke.

[0057] At the same time, in this embodiment, an induced opening is formed between the guide slope and the smoke outflow side of the fan 2. At this time, the induced opening is formed by the gap between the guide slope and the smoke outflow side of the fan 2. The guide slope guides the smoke upward, and the formed induced airflow can guide the smoke into the fan 2.

[0058] The embodiment also includes a control method for heating with a gas water heater:

[0059] When in standby mode, the following steps are included:

[0060] (S.1): Get the water temperature T at the temperature sensor A A , user-set temperature T 0 The temperature sensor A corresponds to the position where water flows into the electric auxiliary heating device. It detects the temperature before the water flows into the electric auxiliary heating device. The main controller makes a judgment. When T A >T 0 When T A <T 0 When the main controller controls the electric auxiliary heating device 1.5 to heat for a fixed time t A1 ; The main controller calculates P 电 = Q×4.18×(T0-TA), where Q is the flow rate of hot water, and the main controller calculates P 电 The maximum power P that can be achieved with the electric auxiliary heating device 1.5 最大 For comparison, when P 电<P 最大 When the electric auxiliary heating device is 1.5, it is in accordance with P 电 Output, when P 电 ≥P 最大 When the electric auxiliary heating device is 1.5, it is in accordance with P 最大 Output; the temperature sensor A corresponds to the position where water flows into the electric auxiliary heating device, and detects the temperature before the water flows into the electric auxiliary heating device;

[0061] (S.2): Every fixed time t A2 Repeat step (S.1), t A2 Greater than t A1 ;

[0062] When in working state, it includes the following steps:

[0063] (S.1'): Get the water temperature T at the temperature sensor A A , user-set temperature T 0 , the main controller makes a judgment, when T A >T 0 When T A <T 0 When the main controller controls the electric auxiliary heating device 1.5 to heat for a fixed time t A3 ; The main controller calculates P 电 = Q×4.18×(T0-TA), where Q is the flow rate of hot water, and the main controller calculates P 电 The maximum power P that can be achieved with the electric auxiliary heating device 1.5 最大 For comparison, when P 电 <P 最大 When the electric auxiliary heating device is 1.5, it is in accordance with P 电 Output, when P 电 ≥P 最大 When the electric auxiliary heating device is 1.5, it is in accordance with P 最大 Output;

[0064] (S.2'): Get the water temperature T at the temperature sensor A again A , the main controller makes a judgment, when T A >T 0 When T A <T 0 When the main controller controls the burner 5 to heat with a certain heating intensity for a fixed time, the heating intensity of the burner 5 is equivalent to the power P1, P1 = Q × 4.18 × (T0-TA), where Q is the flow rate of hot water. When the main controller receives the signal from the water volume sensor, if it is judged that the water flow rate is the maximum value, the gas proportional valve is fully opened, and if it is judged that the water flow rate is half of the maximum value, the gas valve is half opened, and so on;

[0065] (S.3'): Set a positive number △T=0.5 to obtain the water temperature T at the temperature sensor B B , the temperature sensor B corresponds to the location where the hot water finally flows out, and detects the final temperature of the hot water flowing out. The main controller makes a judgment. When T B -T 0 When the absolute value of ≤△T, the main controller does not make a decision; the temperature sensor B corresponds to the location where the hot water finally flows out, and the temperature detected is the final temperature of the hot water flowing out;

[0066] When T B -T 0 When <-△T, increase the heating intensity of burner 5 for a fixed time to obtain water temperature T again. B , if T B -T 0 <-△T, then continue to increase the heating intensity of the burner 5 for a fixed time, and repeat this cycle until T B -T 0 The absolute value of ≤△T;

[0067] When T B -T 0 >△T, reduce the heating intensity of burner 5 and heat for a fixed time to obtain water temperature T again B , if T B -T 0 > △T, then continue to reduce the heating intensity of the burner 5 for a fixed time, and repeat this cycle until T B -T 0 The absolute value of ≤△T;

[0068] (S.4'): Repeat steps (S.1') to (S.3').

[0069] The embodiment also relates to a gas water heater, in which a spoiler structure with an electric auxiliary heating device as described in any of the above embodiments is arranged.

[0070] In the description of this specification, the description with reference to the terms "embodiment", "basic embodiment", "preferred embodiment", "other embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0071] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0072] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A spoiler structure for optimizing resistance distribution, wherein the spoiler (1) is arranged between the fan (2) and the heat exchanger (3), and is characterized in that: The spoiler (1) comprises: A plurality of through-going smoke holes (1.1); a heat exchange flow channel (1.2) disposed in the shell side of the spoiler (1), the heat exchange flow channel (1.2) being respectively provided with a water inlet (1.3) and a water outlet (1.4), the heat exchange flow channel (1.2) being connected to a water flow channel of the heat exchanger (3); a smoke collecting channel (a) located between the smoke outlet of the heat exchanger (3) and the air intake of the fan (2), the smoke collecting channel (a) comprising a first flow area (a.1) located below the fan (2) and a second flow area (a.2); the smoke flows through the spoiler (1) in the first flow area (a.1) and then flows into the second flow area (a.2) through the flow outlet (a.11); The smoke through hole (1.1) comprises a resistance-reducing smoke through hole (1.11) located in the first flow area (a.1), and the smoke outflow trajectory of the resistance-reducing smoke through hole (1.11) points to the outflow port (a.11).

2. The spoiler structure according to claim 1, characterized in that: The resistance-reducing smoke through hole (1.11) has an inclined flow channel.

3. The spoiler structure according to claim 2, characterized in that: The fan (2) covers one side of the spoiler (1).

4. The spoiler structure according to claim 3, characterized in that: Along the direction away from the outflow port (a.11), the inclination of the flow channel in the resistance-reducing smoke through hole (1.11) gradually increases.

5. The spoiler structure according to claim 1, characterized in that: It also includes an electric auxiliary heating device (1.5) arranged in the heat exchange flow channel (1.2) for heating.

6. The spoiler structure according to claim 1, characterized in that: The fan (2) is arranged above the spoiler (1) and partially covers the spoiler (1); the air suction direction of the fan (2) is upward; and the heat exchanger (3) is arranged below the spoiler (1).

7. The spoiler structure according to claim 1, characterized in that: The outer wall of at least part of the smoke through hole (1.1) comprises a heat exchange portion for performing heat exchange with the heat exchange flow channel (1.2).

8. The spoiler structure according to claim 7, characterized in that: The heat exchange flow channel (1.2) surrounds the outer wall of each of the smoke through holes (1.1), and the outer wall of the smoke through holes (1.1) and the shell of the spoiler (1) together form a flow area of ​​the heat exchange flow channel (1.2).

9. The spoiler structure according to claim 1, characterized in that: The fan (2) has an air suction port, a smoke collecting wall (4) is provided between the air suction port and the upper surface of the spoiler (1), and the air suction port, the upper surface of the spoiler (1) and the smoke collecting wall (4) constitute the smoke collecting channel (a).

10. The spoiler structure according to claim 1, characterized in that: The water inlet (1.3) and the water outlet (1.4) are respectively located on two sides of the spoiler (1), and form a circuitous heat exchange flow channel (1.2).

11. Gas water heater, characterized in that: A spoiler structure according to any one of claims 1 to 10 is arranged inside.

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