Spoiler structure with electric auxiliary heating device and gas water heater

Abstract

The utility model discloses a spoiler structure with an electric auxiliary heating device and a gas water heater, and belongs to the technical field of household appliances. In the spoiler structure, a spoiler is arranged between a fan and a heat exchanger, and the spoiler comprises a plurality of through flue gas through holes, the heat exchange flow channel is arranged in the spoiler shell pass, a water inlet and a water outlet are formed in the heat exchange flow channel, and the heat exchange flow channel is communicated with a water flow channel of the heat exchanger; and the electric auxiliary heating device is arranged in the heat exchange runner and is used for heating. According to the pre-heat-exchange spoiler structure, the waiting time of a user can be shortened on the basis of drainage balance, and the use experience of the user is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of household appliances, and particularly relates to a spoiler structure with an electric auxiliary heating device and a gas water heater. Background Art

[0002] A gas water heater uses gas as fuel, heating the water through combustion, transferring heat to cold water flowing through a heat exchanger to produce hot water. For gas water heaters that use a fan to extract air, the fan assembly not only guides the high-temperature flue gas generated by combustion through the heat exchanger and into the fume hood for exhaust, but also provides sufficient oxygen for combustion. However, in this type of structure, the fan assembly is asymmetrically distributed along the gas flow path, resulting in uneven airflow.

[0003] In the existing technology, spoilers are usually set 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. The time users have to wait for hot water to come out when using the water heater will be extended, reducing the user's experience of the gas water heater. Utility Model Content

[0004] To solve the above technical problems, the present application further improves the spoiler structure inside the gas water heater, in order to improve the heat exchange efficiency on the basis of balanced drainage. One of the purposes of this utility model is to provide a spoiler structure with an electric auxiliary heating device, and the second purpose is to provide a corresponding gas water heater.

[0005] The specific technical solution is described below:

[0006] The spoiler structure with electric auxiliary heating device is arranged between the fan and the heat exchanger, and the spoiler includes:

[0007] A number of through-going smoke holes;

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

[0009] An electric auxiliary heating device is provided in the heat exchange flow channel for heating.

[0010] In the above technical solution, after the flue gas passes through the heat exchanger, the temperature is still around 100-200°C. 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 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.

[0011] Preferably, the electric auxiliary heating device includes a heating tube disposed within the spoiler shell and a heating connector disposed on the exterior of the spoiler. Further preferably, the heating tube spirals between several groups of flue gas holes to form a circuitous heating structure, further increasing the heating area and the contact area with the water, enabling rapid heating and further reducing user waiting time.

[0012] Preferably, the fan is disposed above the spoiler and partially covers the spoiler, the exhaust direction of the fan is upward, and the heat exchanger is disposed below the spoiler. This arrangement facilitates the upward exhaust of the fan and forms an up-and-down arrangement direction. Further preferably, the fan covers one side of the spoiler.

[0013] Preferably, the smoke holes corresponding to the covered area of ​​the fan have a larger aperture than the smoke holes at other locations. Further preferably, the aperture of the smoke holes gradually decreases from the covered area to other locations. Due to the covering, the covered area of ​​the fan often has greater flow resistance, while the larger-diameter smoke holes have relatively less flow resistance, facilitating a balanced flow distribution of the drainage gas.

[0014] Preferably, the outer walls of at least part of the flue gas through holes have 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 flue gas through holes, and the outer walls of the flue gas through 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.

[0015] Preferably, the fan has an air intake, a smoke-collecting wall is provided between the air intake and the upper surface of the spoiler, and the air intake, the upper surface of the spoiler, and the smoke-collecting wall constitute a smoke-collecting channel. Further preferably, the smoke-collecting channel includes a first circulation area, and the first circulation area is located below the fan.

[0016] Since the first flow area is arranged below the fan, the smoke will be obstructed 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. Therefore, the first flow area has a greater smoke flow resistance than other flow areas.

[0017] Preferably, the water inlet and the water outlet are respectively located on both sides of the spoiler, forming a circuitous heat exchange flow channel to extend the heat exchange time.

[0018] A gas water heater is internally provided with a spoiler structure as described in any of the above technical solutions.

[0019] In summary, the technical solution of the present invention has the following main beneficial effects:

[0020] Compared with the existing technology, the technical solution of the utility model can improve the heat exchange efficiency and reduce the user's waiting time on the basis of realizing the drainage balance function of the spoiler, thereby improving the user experience.

[0021] Further or more detailed beneficial effects will be described in conjunction with specific examples in the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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;

[0023] Figure 2 yes Figure 1 The fan and the smoke collecting wall constitute a schematic diagram of the structure of the smoke collecting channel;

[0024] Figure 3 1 is a schematic diagram of the planar structure of the spoiler according to the embodiment;

[0025] Figure 4 Schematic diagram of the internal structure of the spoiler described in the embodiment.

[0026] Reference numerals:

[0027] 1: spoiler, 1.1: flue gas channel, 1.2: heat exchange channel, 1.3: water inlet, 1.4: water outlet, 1.5: electric auxiliary heating device, 1.51: heating tube, 1.52: heating joint;

[0028] 2: fan, 3: heat exchanger, 4: smoke collecting wall, 5: burner;

[0029] a: Smoke collection channel, a.1: First circulation area. DETAILED DESCRIPTION

[0030] The present invention will be further explained with reference to the following embodiments:

[0031] 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 existing technology. 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.

[0032] It should be noted that the embodiments do not constitute a limitation on the scope of protection of the claims of the present utility model. Based on the technical concepts provided / proven by the embodiments, all technical solutions that can be reasonably anticipated by technical personnel in the relevant technical field should be included in the scope of protection of the claims of the present utility model.

[0033] The embodiments are described in detail as follows:

[0034] Please refer to the attached Figures 1 to 3 This embodiment relates to a spoiler structure with an electric auxiliary heating device. In this structure, the fan 2 is arranged on one side above the spoiler 1 and covers this side of the spoiler 1. The fan 2 draws air upward. The heat exchanger 3 is arranged below the spoiler 1. The burner 5 is arranged below the heat exchanger 3. The hot air generated by the burner 5 is heated by the heat exchanger 3 and flows to the spoiler 1. This arrangement facilitates the fan 2 to draw air upward and forms an up-down arrangement direction.

[0035] Among them, 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 the first circulation area a.1.

[0036] The spoiler 1 includes a plurality of flue gas holes 1.1 arranged in an array and extending therethrough. A heat exchange channel 1.2 for circulating water is provided within the shell side of the spoiler 1. An electric auxiliary heating device 1.5 is located within the heat exchange channel 1.2 for heating. The electric auxiliary heating device 1.5 comprises a heating tube 1.51 disposed within the shell side of the spoiler 1 and a heating connector 1.52 disposed on the outside of the spoiler 1. The heating tube 1.51 spirals between the plurality of flue gas holes 1.1, forming a circuitous heating structure. This further increases the heating surface area and the contact area with the water, thereby rapidly heating the water.

[0037] 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, thereby prolonging 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.

[0038] 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.

[0039] In the technical solution of this embodiment, the temperature of the flue gas after passing through the heat exchanger 3 is still around 100-200°C. The purpose of providing the above-mentioned heat exchange flow channel 1.2 is to absorb the waste heat of this part of the flue gas, thereby achieving water preheating. At the same time, 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 drainage balancing function achieved by the spoiler 1, the heating efficiency of the gas water heater is improved, the user's waiting time is reduced, and the user experience is improved.

[0040] In a preferred embodiment, the smoke holes 1.1 corresponding to the covered area of ​​the fan 2 have a larger aperture than 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 area to other locations. In this embodiment, due to the covering of the fan 2, there is often a larger flow resistance at the covered area, 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.

[0041] In a preferred embodiment, the area covered by the fan 2 constitutes a first area a.1, and the remaining area constitutes a second flow area. Flue gas flows through the spoiler 1 in the first flow area a.1 and then flows into the second flow area via the outflow outlet. The flue gas through-holes 1.1 include drag-reducing flue gas through-holes located within the first flow area a.1. The flue gas outflow trajectories of the drag-reducing flue gas through-holes are directed toward the outflow outlet. This is achieved by an inclined flow path. Compared to the straight-up and straight-down portion of the flue gas through-holes 1.1, the inclined flow path prolongs the contact path and duration between the flue gas and the spoiler 1, thereby enhancing heat exchange.

[0042] In the preferred technical solution, 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 prevent the smoke from colliding with the surface below the fan 2;

[0043] In the technical solution of this embodiment, the resistance-reducing flue gas holes pointing to the outflow port avoid 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.

[0044] In a preferred embodiment, the spoiler 1 has a stepped portion that descends toward the heat exchanger 3 and is horizontally positioned below the fan 2. A resistance-reducing opening is formed in the first flow area a.1, which is not covered by the spoiler 1. In this embodiment, due to the obstruction of the fan 2, there is greater flow resistance above the first flow area a.1. Therefore, the provision of the resistance-reducing opening reduces the flow resistance in this area, facilitating a balanced flow distribution of the diverted gas and ensuring smoother gas flow.

[0045] At the same time, in the technical solution of this embodiment, compared with a flat-plate spoiler 1 of the same length, the sunken step 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 achieving a more sufficient heat exchange effect.

[0046] The sunken step can also prevent the spoiler 1 and the fan 2 from interfering with each other in the limited internal space of the water heater, facilitating the arrangement of the spoiler 1. The step can extend to the bottom of the fan 2 to maximize the length of the spoiler 1, increase the heat exchange area and the distance and duration of fluid flow, and further improve the heat exchange efficiency.

[0047] In a further preferred embodiment, a guide slope is formed at the sinking part 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 from the bottom of the fan 2 in a horizontal flow state. The horizontal flow direction interferes with the smoke flowing upward out of the spoiler 1, which is not conducive to the smoke passing through the spoiler 1. Therefore, the guide slope is provided in this embodiment. After flowing out from the bottom of the fan 2, the smoke first flows through the guide slope, changes its flow direction, avoids its interference with the smoke flowing upward out of the spoiler 1, and reduces the flow resistance of the smoke.

[0048] At the same time, in this embodiment, an induced opening is formed between the guide slope and the flue gas outflow side of the fan 2. At this time, the induced opening is formed by the gap between the guide slope and the flue gas outflow side of the fan 2. The guide slope guides the flue gas upward, and the formed induced airflow can guide the flue gas into the fan 2.

[0049] The embodiment also includes a method for controlling heating of a gas water heater:

[0050] When in standby mode, the following steps are included:

[0051] (S.1): Get the water temperature T at temperature sensor A A , the user sets the temperature T0, the temperature sensor A corresponds to the position where the water flows into the electric auxiliary heating device, and detects the temperature before the water flows into the electric auxiliary heating device. The main controller makes a judgment. When T A >T0, the main controller does not make a decision; when T A When <T0, 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 Compare, when P 电 <P 最大 When the electric auxiliary heating device is 1.5, it shall be 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; 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;

[0052] (S.2): Every fixed time t A2 Repeat step (S.1), t A2 Greater than t A1 ;

[0053] When in working state, it includes the following steps:

[0054] (S.1'): Get the water temperature T at temperature sensor A A , the user sets the temperature T0, the main controller makes a judgment, when T A >T0, the main controller does not make a decision; when T A When <T0, 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 Compare, 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;

[0055] (S.2'): Get the water temperature T at the temperature sensor A again A , the main controller makes a judgment, when T A >T0, the main controller does not make a decision and the burner 5 does not work; when T A When <T0, the main controller controls the burner 5 to heat at a certain 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 flow sensor, if it determines that the water flow rate is at the maximum value, the gas proportional valve is fully opened; if it determines that the water flow rate is half of the maximum value, the gas valve is half opened, and so on;

[0056] (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 When the absolute value of -T0 is ≤△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 detects the final temperature of the hot water flowing out;

[0057] When TB When -T0<-ΔT, increase the heating intensity of the burner 5 and heat for a fixed time to obtain the water temperature T again. B , if T B -T0<-△T, then continue to increase the heating intensity of the burner 5 for a fixed time, and repeat this cycle until T B -The absolute value of T0 ≤ △T;

[0058] When T B -T0>△T, reduce the heating intensity of burner 5 and heat for a fixed time to obtain the water temperature T again. B , if T B -T0>△T, then continue to reduce the heating intensity of burner 5 and heat for a fixed time, and repeat this cycle until T B -The absolute value of T0 ≤ △T;

[0059] (S.4'): Repeat steps (S.1') to (S.3').

[0060] The embodiment further relates to a gas water heater, wherein a spoiler structure with an electric auxiliary heating device as described in any of the above embodiments is provided inside the gas water heater.

[0061] Throughout this specification, reference to terms such as "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 that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0062] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional 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.

[0063] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A spoiler structure with an electric auxiliary heating device, 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 flue gas holes (1.1); a heat exchange flow channel (1.2) provided in the shell side of the spoiler (1), the heat exchange flow channel (1.2) being provided with a water inlet (1.3) and a water outlet (1.4), and the heat exchange flow channel (1.2) being connected to the water flow channel of the heat exchanger (3); An electric auxiliary heating device (1.5) for heating is provided in the heat exchange flow channel (1.2).

2. The spoiler structure according to claim 1, characterized in that: The electric auxiliary heating device (1.5) comprises 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).

3. The spoiler structure according to claim 2, characterized in that: The heating tube (1.51) is coiled between a plurality of groups of smoke through holes (1.1) to form a circuitous heating structure.

4. 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 exhaust direction of the fan (2) is upward; and the heat exchanger (3) is arranged below the spoiler (1).

5. The spoiler structure according to claim 4, characterized in that: The fan (2) covers one side of the spoiler (1).

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

7. The spoiler structure according to claim 6, characterized in that: The heat exchange flow channel (1.2) surrounds the outer wall of each of the flue gas through holes (1.1), and the outer wall of the flue gas through holes (1.1) and the shell of the heat exchanger (3) together form the flow area of ​​the heat exchange flow channel (1.2).

8. The spoiler structure according to claim 4, 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 a smoke collecting channel (a).

9. The spoiler structure according to claim 8, characterized in that: The smoke collecting channel (a) comprises a first circulation area (a.1), and the first circulation area (a.1) is located below the fan (2).

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 both sides of the spoiler (1), and form a circuitous heat exchange flow channel (1.2).

11. Gas water heater, characterized by: The spoiler structure according to any one of claims 1 to 10 is provided inside.

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