Anti-interference spoiler structure and gas water heater

Abstract

The utility model discloses an anti-interference spoiler structure and a gas water heater, and belongs to the technical field of household appliances. In the structure, a spoiler is arranged between a fan and a heat exchanger, the fan is arranged above the spoiler, the heat exchanger is arranged below the spoiler, the spoiler comprises a plurality of through flue gas through holes and a heat exchange flow channel arranged in a shell pass of the spoiler, and the heat exchange flow channel is arranged in the shell pass of the spoiler. A water inlet and a water outlet are respectively formed in the heat exchange flow channel, and the heat exchange flow channel is communicated with a water flow channel of the heat exchanger; the spoiler is provided with a step part sinking towards the heat exchanger. According to the spoiler structure, on the basis of drainage balance, interference between the spoiler and the fan can be better prevented, the flowing path of fluid in the heat exchange runner can be increased, the heat exchange time is prolonged, the heat exchange efficiency is further improved, and water preheating is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of household appliances, and particularly relates to an anti-interference spoiler structure 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 prior art, spoilers are usually provided to balance the drainage effect of the fan, but this increases the gas flow resistance, is not conducive to heat exchange, often leads to a decrease in heat exchange efficiency, and the spoiler is prone to spatial interference with the fan. Utility Model Content

[0004] To solve the above technical problems, the present invention further improves the spoiler structure inside the gas water heater, in order to improve the balance of drainage and enhance the heat exchange efficiency. One of the purposes of the present invention is to provide an anti-interference spoiler structure, and the second purpose is to provide a corresponding gas water heater.

[0005] The specific technical solution is described below:

[0006] An anti-interference spoiler structure, wherein the spoiler is arranged between the fan and the heat exchanger, the fan is arranged above the spoiler, and the heat exchanger is arranged below the spoiler;

[0007] The spoiler includes a plurality of through flue gas holes and a heat exchange channel arranged in the shell side of the spoiler, and the heat exchange channel is respectively 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;

[0008] The spoiler has a stepped portion that is sunken toward the heat exchanger.

[0009] The arrangement in the above technical solution facilitates the upward extraction of air by the fan and forms an up-down arrangement direction. The spoiler is used to balance the resistance of the smoke flowing into the air intake.

[0010] After the flue gas passes through the heat exchanger, the temperature is still around 100-200°C. By setting a heat exchange flow channel in the spoiler and providing a sunken step portion, the sinking can better prevent interference between the spoiler and the fan, and can also improve the flow path of the fluid in the heat exchange flow channel, thereby extending the heat exchange time, further improving the heat exchange efficiency, and better absorbing the waste heat of this part of the flue gas, thereby realizing water preheating.

[0011] Preferably, the spoiler also includes an electric auxiliary heating device for heating 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.

[0012] 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 the plurality of smoke through-holes to form a circuitous heating structure, and has a bend structure adapted to the shape of the stepped portion, thereby further increasing the heating area and the contact area with the water, achieving rapid heating and further reducing user waiting time.

[0013] Preferably, the fan has an air intake and covers one side of the spoiler, a smoke-collecting wall is provided between the air intake and the upper surface of the spoiler, the air intake, the upper surface of the spoiler and the smoke-collecting wall constitute a smoke-collecting channel, the smoke-collecting channel includes a first circulation area located below the fan and a second circulation area located in other parts, and the spoiler is provided above the second circulation area. Further preferably, the heating joint, the water inlet and the water outlet are provided on the same side of the spoiler, and the heating joint is located between the water inlet and the water outlet. This technical solution allows the spoiler to avoid the obstruction area below the fan, that is, the first circulation area, allowing the gas to flow more smoothly, and by leaving the spoiler on one side of the first circulation area, it is convenient to install the water inlet, the water outlet and the heating joint.

[0014] Preferably, the spoiler is located below the fan in the horizontal direction.

[0015] Further preferably, an opening is formed between the step portion and the fan for gas to flow from the first flow area to the air intake port, and the sinking of the step portion can expand the above-mentioned opening, further reducing the gas flow resistance.

[0016] 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.

[0017] A gas water heater is internally provided with a spoiler structure as described in any of the above technical solutions.

[0018] In summary, the technical solution of the present invention has the following main beneficial effects:

[0019] Compared with the existing technology, the technical solution of the utility model can improve the heat exchange efficiency and prevent interference between the spoiler and the fan on the basis of the spoiler realizing the drainage balance function.

[0020] At the same time, the electric auxiliary heating device can reduce the user's waiting time and thus improve 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 according to an embodiment;

[0023] Figure 2 yes Figure 1 Schematic diagram of the flow path structure of the flue gas in the smoke collection channel;

[0024] Figure 3 2 is a schematic diagram of the three-dimensional 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 pipe, 1.52: heating joint, 1.6: step;

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

[0029] a: Smoke collection channel, a.1: First circulation area, a.2: Second 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 this application comes from the inventor's accurate understanding of the existing technology. Therefore, how to further improve the thermal efficiency on the basis of the spoiler to achieve the drainage balancing function and prevent interference between the spoiler and the fan is a technical problem that the inventor urgently needs to solve.

[0032] At the same time, how to reduce the user's waiting time and improve the user experience is also a technical problem that the inventor wants to solve simultaneously.

[0033] 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.

[0034] The embodiments are described in detail as follows:

[0035] Please refer to the attached Figures 1 to 4 This embodiment relates to an anti-interference spoiler structure, in which 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, and the burner 5 is arranged below the heat exchanger 3. The 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-down arrangement direction.

[0036] The spoiler 1 includes a plurality of flue gas through-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 for heating is provided within the heat exchange channel 1.2. In this embodiment, the spoiler 1 also has a stepped portion 1.6 that descends toward the heat exchanger 3.

[0037] The electric auxiliary heating device 1.5 comprises a heating tube 1.51 disposed within the shell of the spoiler 1 and a heating connector 1.52 disposed externally of the spoiler 1. The heating tube 1.51 spirals between the groups of flue gas holes 1.1 to form a circuitous heating structure. The heating tube 1.51 also has a bend structure adapted to the shape of the step 1.6 to further increase the heating area and the contact area with the water, thereby rapidly heating the water.

[0038] 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 channel 1.2 is to absorb the residual heat of this part of the flue gas, thereby achieving preheating of the water. The sunken step portion 1.6 can prevent interference between the spoiler 1 and the fan 2, and can also improve the flow path of the fluid in the heat exchange channel 1.2, thereby extending the heat exchange time, further improving the heat exchange efficiency, and better absorbing the residual heat of this part of the flue gas.

[0039] In a preferred embodiment, the side of the spoiler 1 facing away from the fan 2 is equipped with a water inlet 1.3 and a water outlet 1.4, forming a circuitous heat exchange channel. A heating connector 1.52 is also located on this side, positioned between the water inlet 1.3 and the water outlet 1.4. This technical solution, by leaving the spoiler 1 free on one side of the first circulation area a.1, facilitates the installation of the water inlet 1.3, the water outlet 1.4, and the heating connector 1.51.

[0040] In this embodiment, the circuitous heat exchange channel 1.2 can 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 heat exchange efficiency.

[0041] 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.

[0042] Further effects of this embodiment include: 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.

[0043] In a preferred embodiment, a smoke-collecting wall 4 is provided between the air intake of the fan 2 and the upper surface of the spoiler 1. The air intake, the upper surface of the spoiler 1, and the smoke-collecting wall 4 form a smoke-collecting channel a. In the smoke-collecting channel a, the area covered by the fan 2 constitutes a first flow area a.1, and the remaining area constitutes a second flow area a.2. The spoiler 1 is provided above the second flow area a.2.

[0044] Because the first flow area a.1 is located below the fan 2, the smoke flowing upward through this area is obstructed by the lower surface of the fan 2. This means that the fan 2 constitutes the source of resistance in the first flow area a.1. In contrast, the second flow area a.2 does not have the fan 2 to obstruct the smoke flow. Therefore, the first flow area a.1 has a greater smoke flow resistance than the second flow area a.2.

[0045] At the same time, the spoiler 1 is located horizontally below the fan 2, and an opening is formed between the step 1.6 and the fan 2 for gas to flow from the above-mentioned first flow area a.1 to the air intake port. The sinking of the step 1.6 can expand the above-mentioned opening and further reduce the gas flow resistance.

[0046] 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 spoiler 1 avoids this area to form the first flow area a.1. No obstacles are set so that this 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. By leaving the spoiler 1 on one side of the first flow area a.1, it is convenient to install the water inlet 1.3, the water outlet 1.4 and the heating joint 1.52.

[0047] In a preferred embodiment, the spoiler 1 completely covers the burner 3. The flue gas through-holes 1.1 include drag-reducing flue gas through-holes located within the first flow region a.1. The flue gas outflow trajectories of the drag-reducing flue gas through-holes are directed toward the corresponding openings at the stepped portion 1.6. The drag-reducing flue gas through-holes are directed toward the corresponding openings via inclined flow paths. Compared to straight upward and downward flue gas through-holes, the inclined flow paths prolong the contact path and duration between the flue gas and the spoiler 1, thereby enhancing heat exchange.

[0048] Further preferably, the inclination of the flow channel in the resistance-reducing flue gas through hole gradually increases as it moves away from the opening, so as to more accurately direct the flow channel toward the opening and prevent the flue gas from colliding with the surface below the fan 2. This can reduce the flow resistance of the flue gas in the first flow area a.1, balance the distribution of the flue gas, and improve the heat exchange efficiency.

[0049] Further preferably, the smoke holes corresponding to the covered part of the fan 2 have a larger aperture than the smoke holes at other places, and the aperture of the smoke holes gradually decreases along the direction from the covered part to other places. 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 with larger apertures have relatively smaller flow resistance, which is convenient for balancing the flow distribution of the drainage gas.

[0050] The embodiment also includes a method for controlling heating of a gas water heater:

[0051] When in standby mode, the following steps are included:

[0052] (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 AWhen <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 will calculate 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; 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;

[0053] (S.2): Every fixed time t A2 Repeat step (S.1), t A2 Greater than t A1 ;

[0054] When in working state, it includes the following steps:

[0055] (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 will calculate 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;

[0056] (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 AWhen <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;

[0057] (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 final outflow position of hot water, and detects the final outflow temperature of hot water. 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;

[0058] When T B 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;

[0059] 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;

[0060] (S.4'): Repeat steps (S.1') to (S.3').

[0061] The embodiment further relates to a gas water heater, wherein the spoiler structure described in any of the above embodiments is provided inside the gas water heater.

[0062] 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.

[0063] 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.

[0064] 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. An anti-interference spoiler structure, wherein the spoiler (1) is arranged between the fan (2) and the heat exchanger (3), the fan (2) is arranged above the spoiler (1), and the heat exchanger (3) is arranged below the spoiler (1), characterized in that: The spoiler (1) comprises a plurality of through flue gas holes (1.1) and a heat exchange flow channel (1.2) arranged 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), and the heat exchange flow channel (1.2) being connected to the water flow channel of the heat exchanger (3); The spoiler (1) has a stepped portion (1.6) that sinks toward the heat exchanger (3).

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

3. The spoiler structure according to claim 2, 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).

4. The spoiler structure according to claim 3, 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, and has a bending structure adapted to the shape of the step portion (1.6).

5. The spoiler structure according to claim 3, characterized in that: The fan (2) has an air intake and covers one side of the spoiler (1); a smoke collecting wall (4) is provided between the air intake and the upper surface of the spoiler (1); the air intake, the upper surface of the spoiler (1) and the smoke collecting wall (4) constitute a smoke collecting channel (a); the smoke collecting channel (a) includes a first flow area (a.1) located below the fan (2) and a second flow area (a.2) located in other parts; the spoiler (1) is provided above the second flow area (a.2).

6. The spoiler structure according to claim 5, characterized in that: The heating joint (1.52), the water inlet (1.3) and the water outlet (1.4) are arranged on the same side of the spoiler (1), and the heating joint (1.52) is located between the water inlet (1.3) and the water outlet (1.4).

7. The spoiler structure according to claim 1, characterized in that: The spoiler (1) is located below the fan (2) in the horizontal direction.

8. The spoiler structure according to claim 5, characterized in that: An opening is formed between the step portion (1.6) and the fan (2), through which gas flows from the first flow area (a.1) to the air suction port.

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

10. The spoiler structure according to claim 9, 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 a flow area of ​​the heat exchange flow channel (1.2).

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

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