Spoiler structure avoiding draught fan and gas water heater

Abstract

The utility model discloses a spoiler structure avoiding a fan 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, 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, 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 draught fan is provided with an air suction opening and covers one side of the spoiler, a smoke gathering wall is arranged between the air suction opening and the upper surface of the spoiler, the air suction opening, the upper surface of the spoiler and the smoke gathering wall form a smoke gathering channel, and the smoke gathering channel comprises a first circulation area located below the draught fan and a second circulation area located on other parts. The spoiler is arranged above the second circulation area. According to the spoiler structure, on the basis of drainage balance, the spoiler can avoid a shielding area below a fan, and air flows more smoothly.

Description

Technical Field

[0001] The utility model belongs to the technical field of household appliances, and particularly relates to a spoiler structure for avoiding a fan 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 will increase the gas flow resistance, which is not conducive to heat exchange and often leads to a decrease in heat exchange efficiency. Utility Model Content

[0004] To solve the above technical problems, the present invention further improves the structure of the spoiler 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 a spoiler structure that avoids the fan, 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 avoiding a fan, 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, characterized in that:

[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 fan has an air suction port and covers one side of the spoiler, a smoke-collecting wall is arranged between the air suction port and the upper surface of the spoiler, the air suction port, the upper surface of the spoiler and the smoke-collecting wall constitute a smoke-collecting channel, the smoke-collecting channel includes a first flow area located below the fan and a second flow area located in other parts, and the spoiler is arranged above the second flow area.

[0009] The arrangement in the above technical solution facilitates the upward extraction of air by the fan and forms an up-and-down arrangement direction. The spoiler is used to balance the resistance of the smoke flowing into the air intake and to avoid the obstruction area below the fan - that is, the first flow area, so that the gas flow is smoother.

[0010] After the flue gas passes through the heat exchanger, the temperature is still around 100-200℃. By setting a heat exchange flow channel in the spoiler, the waste heat of this part of the flue gas is absorbed, thereby achieving 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 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.

[0013] Preferably, the water inlet and outlet are located on the same side of the spoiler, forming a circuitous heat exchange channel. Further preferably, the heating connector, the water inlet, and the water outlet are located on the same side of the spoiler, with the heating connector located between the water inlet and the water outlet. This technical solution facilitates the installation of the water inlet, water outlet, and heating connector by leaving the spoiler free on one side of the first circulation area.

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

[0015] Further preferably, an opening is formed between the spoiler and the fan, through which gas flows from the first circulation area to the air suction port.

[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 on the basis of the spoiler realizing the drainage balance function, and make the spoiler avoid the blocking area under the fan, so that the gas flow is smoother.

[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 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, 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 the present application comes from the inventor's accurate understanding of the existing technology. Therefore, how to further improve the thermal efficiency on the basis of achieving the drainage balancing function of the spoiler 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 needs 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 a spoiler structure for avoiding fans. 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, 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 and down arrangement direction.

[0036] The fan 2 has an air intake, and 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 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.

[0037] At the same time, the spoiler 1 is located below the fan 2 in the horizontal direction, and an opening is formed between the spoiler 1 and the fan 2 for gas to flow from the first flow area a.1 to the air suction port.

[0038] In this embodiment, due to the cover of the fan 2, there is a large flow resistance above the first flow area a.1. Therefore, 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] The embodiment also includes a method for controlling heating of a gas water heater:

[0045] When in standby mode, the following steps are included:

[0046] (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 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;

[0047] (S.2): Every fixed time t A2 Repeat step (S.1), t A2 Greater than t A1 ;

[0048] When in working state, it includes the following steps:

[0049] (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;

[0050] (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;

[0051] (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 BWhen 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;

[0052] 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;

[0053] 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;

[0054] (S.4'): Repeat steps (S.1') to (S.3').

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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 for avoiding a fan, 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); a water inlet (1.3) and a water outlet (1.4) are respectively provided on the heat exchange flow channel (1.2); the heat exchange flow channel (1.2) is connected to the water flow channel of the heat exchanger (3); 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).

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 water inlet (1.3) and the water outlet (1.4) are located on the same side of the spoiler (1), and form a circuitous heat exchange flow channel (1.2).

5. The spoiler structure according to claim 4, 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).

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

7. The spoiler structure according to claim 6, characterized in that: An opening is formed between the spoiler (1) and the fan (2) for gas to flow from the first flow area (a.1) to the air suction port.

8. 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).

9. The spoiler structure according to claim 8, 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).

10. Gas water heater, characterized by: The spoiler structure according to any one of claims 1 to 9 is provided inside.

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