CN220892556U

CN220892556U - Water heater

Info

Publication number: CN220892556U
Application number: CN202321781388.4U
Authority: CN
Inventors: 周谌; 曾成; 向武; 夏凯
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2023-07-07
Filing date: 2023-07-07
Publication date: 2024-05-03
Anticipated expiration: 2033-07-07

Abstract

The utility model provides a water heater, which comprises a shell, wherein an air inlet is formed in the shell; the heat exchanger is arranged in the shell; the heat exchanger comprises a shell, a flow guiding structure, a heat exchanger and a heat exchange device, wherein the flow guiding structure is arranged in the shell, the heat exchanger is provided with a first end far away from the air inlet and a second end opposite to the first end, the flow guiding structure is arranged at the first end, and the flow guiding structure can enable at least part of gas in the shell to flow to the second end of the heat exchanger. According to the water heater provided by the utility model, the air flow blown to the first end of the heat exchanger at the air inlet is guided by arranging the flow guiding structure at the part of the heat exchanger far away from the air inlet, so that the air flow can be uniformly distributed on the windward side of the heat exchanger, thereby ensuring that all heat exchange pipes of the heat exchanger can perform good heat exchange, and increasing the heat exchange efficiency of the heat exchanger.

Description

Water heater

Technical Field

The utility model relates to the technical field of heating equipment, in particular to a water heater.

Background

Air-source heat pump water heater. The air energy water heater absorbs low-temperature heat in the air, is gasified by a fluorine medium, is heated and pressurized after being compressed by a compressor, and is converted into water for heating by a heat exchanger (the compressed high-temperature heat energy is used for heating the water temperature). The air energy water heater has the characteristics of high efficiency and energy saving, and the same hot water quantity is 4-6 times of that of the electric water heater, so that the energy utilization efficiency is high, and the problems that the solar water heater needs to collect heat by sunlight and is inconvenient to install can be solved.

In the prior art, the second-end air-supply and return type air energy water heater is widely applied. The air inlet area of the existing second-end air-supply and return type air energy water heater in the market is smaller due to the limiting conditions such as an external air pipe and the like. When the fan operates, the local air flow velocity at the air inlet is faster, and the air quantity distribution of the first end pipeline of the heat exchanger is obviously uneven due to inertia factors. When the rotating speed of the fan is high, the non-uniformity of the local air quantity distribution of the heat exchanger is aggravated, and the heat exchange effect of the heat exchanger and the water heater is affected.

Disclosure of utility model

In order to solve the technical problem that the heat exchange effect is affected due to uneven air quantity distribution of the heat exchanger in the prior art, the water heater is provided, which utilizes a flow guiding structure to guide air flowing through the heat exchanger so as to improve heat exchange efficiency.

A water heater, comprising:

the shell is provided with an air inlet;

The heat exchanger is arranged in the shell;

The heat exchanger comprises a shell, a flow guiding structure, a heat exchanger and a heat exchange device, wherein the flow guiding structure is arranged in the shell, the heat exchanger is provided with a first end far away from the air inlet and a second end opposite to the first end, the flow guiding structure is arranged at the first end, and the flow guiding structure can enable at least part of gas in the shell to flow to the second end of the heat exchanger.

The heat exchanger comprises at least two heat exchange tubes, and all the heat exchange tubes are arranged in parallel along the direction from the first end to the second end.

The shell comprises a first side wall and a second side wall which are opposite to each other, the air inlet is formed in the first side wall, and the part, away from the air inlet, of the flow guiding structure is formed in the second side wall.

The flow guiding structure is provided with a flow guiding surface, and a first included angle alpha is formed between the plane of the flow guiding surface and the windward side of the heat exchanger; and/or the plane where the flow guiding surface is located and the plane where the second side wall is located have a second included angle theta.

The angle range of the first included angle alpha is 30-60 degrees; and/or, the second included angle θ is in the range of 30 ° to 60 °.

The flow guiding structure comprises a flow guiding plate, and the side surface of the flow guiding plate, which is far away from the heat exchanger, forms the flow guiding surface.

The guide plate shields part of the heat exchanger, and the guide plate is provided with an overflow hole.

The cross section of the overflow hole is circular, and the relation between the diameter D of the overflow hole and the length L3 of the guide plate is 0.01L3-0.05L3;

And/or the relation between the center distance L1 of two adjacent overflow holes in the length direction of the guide plate and the diameter D of the overflow holes is 1.5D.ltoreq.L1.ltoreq.3D;

and/or the relation between the center distance L2 of the adjacent two overflowing holes in the width direction of the guide plate and the diameter D of the overflowing holes is 1.5D-L2-3D.

The guide plate is far away from the edge of the first end, a rounding structure is arranged on the edge of the guide plate, and the circle center of the rounding structure is located between the guide plate and the heat exchanger.

The flow guiding structure further comprises a side plate, wherein the side plate is arranged at the end part of the flow guiding plate in the length direction, and the side plate is in sealing fit with the flow guiding plate and/or the heat exchanger; and/or, the flow guiding structure further comprises a bottom plate, the flow guiding plate is arranged on the bottom plate, and the bottom plate is arranged on the second side wall.

According to the water heater provided by the utility model, the air flow blown to the first end of the heat exchanger at the air inlet is guided by arranging the flow guiding structure at the part of the heat exchanger far away from the air inlet, so that the air flow can be uniformly distributed on the windward side of the heat exchanger, thereby ensuring that all heat exchange pipes of the heat exchanger can perform good heat exchange, increasing the heat exchange efficiency of the heat exchanger, effectively solving the problem of low heat exchange efficiency at the second end of the heat exchanger caused by the fact that the air flow of the air inlet is concentrated at the first end of the heat exchanger in the prior art, and providing uniform air inlet conditions for the heat exchanger under the condition that the air quantity and the power of a fan are basically unchanged, and further enhancing the heat exchange capacity.

Drawings

FIG. 1 is a perspective view of a water heater provided by the present utility model;

FIG. 2 is a cross-sectional view of a water heater provided by the present utility model;

FIG. 3 is a schematic structural diagram of a water heater according to the present utility model;

FIG. 4 is a cross-sectional view of a flow guiding structure of a water heater provided by the utility model;

In the figure:

1. A housing; 11. an air inlet; 2. a heat exchanger; 3. a flow guiding structure; 21. a first end; 22. a second end; 23. a heat exchange tube; 12. a second sidewall; 31. a flow guiding surface; 32. a side plate; 33. a bottom plate; 4. and the overflow hole.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the utility model described herein are, for example, capable of operation in other environments. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be noted that, in the description of the present utility model, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "configured," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected, can be indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

In the prior art, the second-end air-supply and return type air energy water heater is widely applied. The air can water heater includes the casing, the casing has the roof, be provided with air intake and air outlet on the roof, and be provided with the heat exchanger inside the casing, between air intake and the air outlet, and set up the fan that can axial air inlet and circumference air-out in the below of air outlet, utilize the effect of fan to force the outside gas of casing to get into the casing through the air intake, and exchange heat with the heat exchanger when flowing through the heat exchanger, then be discharging through fan and air outlet, because the fan is the position that the air intake was kept away from at the heat exchanger produces the negative pressure, and because its external limiting conditions such as tuber pipe, the air intake area is less. When the fan operates, the local air flow rate at the air inlet is faster, the air quantity at the first end pipeline of the heat exchanger is larger due to inertia factors, and the air quantity at the second end pipeline of the heat exchanger is smaller, so that the distribution of the air at the windward side of the whole heat exchanger is obviously uneven. When the fan rotational speed is great, the distribution unevenness of heat exchanger first end amount of wind and second end amount of wind further aggravates for the heat exchange efficiency of the heat exchange tube of heat exchanger second end is less than the heat exchange efficiency of the heat exchange tube of heat exchanger first end far away, influences the heat transfer effect of heat exchanger and water heater. To this end, the water heater as shown in fig. 1 to 4 includes: the device comprises a shell 1, wherein an air inlet 11 is formed in the shell 1; a heat exchanger 2, wherein the heat exchanger 2 is arranged in the shell 1; the air guiding structure 3, the air guiding structure 3 is arranged in the shell 1, the heat exchanger 2 is provided with a first end 21 far away from the air inlet 11 and a second end 22 opposite to the first end 21, the air guiding structure 3 is arranged at the first end 21, and the air guiding structure 3 can enable at least part of air in the shell 1 to flow to the second end 22 of the heat exchanger 2. Through setting up water conservancy diversion structure 3 in the part department that heat exchanger 2 kept away from air intake 11, blow air intake 11 department to the air current of heat exchanger 2 first end 21 and lead, make the air current can even distribution on the windward side of heat exchanger 2 to guarantee that all heat exchange tubes of heat exchanger 2 can carry out good heat transfer, increase heat exchange efficiency of heat exchanger 2, effectually overcome among the prior art air intake 11's air current concentrate at heat exchanger 2 first end 21 and cause the problem that heat exchange efficiency is low of heat exchanger 2 second end 22, under the circumstances of guaranteeing fan amount of wind, power is unchangeable basically, provide even air inlet condition for heat exchanger 2, thereby reinforcing water heater's heat transfer ability.

The heat exchanger 2 comprises at least two heat exchange tubes 23, all of the heat exchange tubes 23 being arranged side by side in the direction from the first end 21 to the second end 22. That is, the axial direction of the heat exchange tube 23 is relatively perpendicular to the direction from the first end 21 to the second end 22 of the heat exchanger 2, so that the influence of gravity on the refrigerant in the heat exchanger 2 can be reduced, but when the airflows at the second end 22 and the first end 21 of the heat exchanger 2 are uneven, the heat exchange efficiency of the heat exchanger 2 is also uneven, and therefore, the airflow flowing to the first end 21 of the heat exchanger 2 is guided by adopting the guiding structure 3, so that the airflow flows to the second end 22 of the heat exchanger 2, the overall heat exchange efficiency of the heat exchanger 2 is ensured to be even, and even air inlet conditions are provided for the heat exchanger 2 under the condition that the air quantity and the power of a fan are basically unchanged, so that the heat exchange capacity is enhanced.

It should be noted that the arrangement of the flow guiding structure 3 at the first end 21 of the heat exchanger 2 includes two cases:

The first is that the flow guiding structure 3 is positioned at the edge of the first end 21 of the heat exchanger 2, namely, the flow guiding structure 3 does not shade the heat exchanger 2 at this time, the air flow flowing to the lower part of the heat exchanger 2 flows towards the windward side of the heat exchanger 2 under the action of the flow guiding structure 3, and meanwhile, the air flow flowing to the first end 21 of the heat exchanger 2 can be driven to synchronously flow towards the second end 22 of the heat exchanger 2, so that the problem that the heat exchanger 2 is affected due to uneven distribution of the air flow on the windward side of the heat exchanger 2 is solved, and uniform air inlet conditions are provided for the heat exchanger 2 under the condition that the air quantity and the power of a fan are basically unchanged, thereby enhancing the heat exchange capacity;

The second is that the flow guiding structure 3 is partially overlapped with the first end 21 of the heat exchanger 2, at this time, the flow guiding structure 3 directly guides the air flow of the first end 21 of the heat exchanger 2, part of the air flow can pass through the flow guiding structure 3 and flow to the first end 21 of the heat exchanger 2, and most of the air flow can flow to the second end 22 of the heat exchanger 2 under the guiding action of the flow guiding structure 3, so that the problem that the heat exchanger 2 is affected due to uneven air flow distribution of the windward side of the heat exchanger 2 is solved, and uniform air inlet conditions are provided for the heat exchanger 2 under the condition that the air quantity and the power of a fan are basically unchanged, so that the heat exchange capacity is enhanced.

As an embodiment, the housing 1 includes a first side wall and a second side wall 12 opposite to each other, the air inlet 11 is disposed on the first side wall, and a portion of the air guiding structure 3 away from the air inlet 11 is disposed on the second side wall 12. The air flow flowing into the shell 1 at the air inlet 11 flows towards the second side wall 12 under the action of the air flow velocity, and because the flow guiding structure 3 is arranged on the second side wall 12, the air flow can flow towards the second end 22 of the heat exchanger 2 under the guiding action of the flow guiding structure 3, so that the problem that the heat exchanger 2 is influenced due to uneven distribution of the air flow on the windward side of the heat exchanger 2 is solved, uniform air inlet conditions are provided for the heat exchanger 2 under the condition that the air quantity and the power of a fan are basically unchanged, and the heat exchange capacity is enhanced. As shown in fig. 1, in the figure, the flow guiding structure 3 is located between the air inlet 11 and the heat exchanger 2, the fan is disposed at one side of the heat exchanger 2 far away from the air inlet 11, when the fan works, negative pressure is generated at the air inlet 11 to force air to enter the shell 1 through the air inlet 11, because the fan generates negative pressure in the whole area of the heat exchanger 2, air flow at the air inlet 11 can flow towards the first end 21 of the heat exchanger 2 under the action of inertia, when the air flow flows through the flow guiding structure 3, the flow guiding structure 3 can force the flow direction of the air flow to change and flow towards the second end 22 of the heat exchanger 2, the air quantity of the second end 22 of the heat exchanger 2 is increased to ensure uniform air flow distribution of the windward side of the heat exchanger 2, heat exchange efficiency of the heat exchange tube 23 at the second end 22 is ensured, and heat exchange efficiency of the heat exchanger 2 is improved.

Specifically, the flow guiding structure 3 has a flow guiding surface 31, and a plane where the flow guiding surface 31 is located and a windward side of the heat exchanger 2 have a first included angle α. When the airflow flows through the flow guiding structure 3, the airflow can flow along the flow guiding surface 31 to change the flowing direction, and as the plane of the flow guiding surface 31 and the windward side of the heat exchanger 2 have a first included angle alpha, the airflow has a component flowing in parallel along the windward side of the heat exchanger 2 after flowing through the flow guiding surface 31, and the airflow component just points to the second end 22 of the heat exchanger 2, so that the air quantity at the second end 22 of the heat exchanger 2 is increased.

Optionally, the first included angle α is in an angle range of 30 ° to 60 °, preferably 45 °. When the angle of the first included angle α is smaller than 30 °, the component of parallel flow along the windward side of the heat exchanger 2 generated on the flow guiding surface 31 is smaller, the air volume flowing to the second end 22 of the heat exchanger 2 is lifted less, the air flow distribution on the windward side of the heat exchanger 2 is still uneven, the standard deviation value of the air volume distribution percentage is larger, and the occupied area of the flow guiding structure 3 on the second side wall 12 is larger at this time, interference (e.g. collision with a compressor foot pad) can be generated with other structures in the water heater, the volume of the water heater can be increased, and the installation of the flow guiding structure 3 is limited at this time; when the angle of the first included angle α is greater than 60 °, the component of parallel flow along the windward side of the heat exchanger 2 generated on the flow guiding surface 31 is greater, the air quantity flowing to the second end 22 of the heat exchanger 2 is promoted greatly, but because the component of parallel flow is greater, the flow component perpendicular to the heat exchanger 2 is smaller, that is, the windage resistance of the flow guiding structure 3 is increased, so that the air quantity flowing through the first end 21 of the heat exchanger 2 is seriously attenuated, but the heat exchange efficiency of the heat exchanger 2 is affected, the air flow distribution on the windward side of the heat exchanger 2 is still uneven, and the standard difference value of the air quantity distribution percentage is larger; that is, when the angle of the first included angle α is outside the range of 30 ° to 60 °, both the flow guiding and equalizing effects of the flow guiding structure 3 are deteriorated, and the heat exchanging efficiency of the heat exchanger 2 is adversely affected.

Similarly, the end of the air guiding structure 3 far away from the air inlet 11 is disposed on the second side wall 12, and since the airflow flowing direction of the air inlet 11 is mostly completely perpendicular to the second side wall 12, in order to reduce the wind loss caused by the impact of the airflow on the air guiding structure 3, the plane of the air guiding surface 31 and the plane of the second side wall 12 have a second included angle θ, and the airflow will first turn when flowing through the air guiding surface 31 by using the second included angle θ, so that the wind loss caused by the impact of the airflow on the air guiding structure 3 is reduced, thereby improving the air quantity and pressure reaching the heat exchanger 2, and further achieving the purpose of improving the heat exchange efficiency of the heat exchanger 2.

Particularly, when the first included angle alpha is arranged between the plane of the flow guiding surface 31 and the windward side of the heat exchanger 2, the airflow of the air inlet 11 can sequentially utilize the second included angle theta to conduct primary flow guiding and the first included angle alpha to conduct secondary flow guiding when flowing through the flow guiding surface 31, so that the resistance of the airflow in the process of flowing to the heat exchanger 2 is further reduced, and the heat exchange efficiency of the heat exchanger 2 can be further improved.

Optionally, the second included angle θ may range from 30 ° to 60 °, and preferably is 45 °. When the angle of the second included angle θ is greater than 60 °, the component of parallel flow along the windward side of the heat exchanger 2 generated on the flow guiding surface 31 is smaller, the air volume flowing to the second end 22 of the heat exchanger 2 is lifted less, the air flow distribution on the windward side of the heat exchanger 2 is still uneven, the standard deviation value of the air volume distribution percentage is larger, and the occupied area of the flow guiding structure 3 on the second side wall 12 is larger at this time, interference (e.g. collision with a compressor foot pad) can be generated with other structures in the water heater, the volume of the water heater can be increased, and the installation of the flow guiding structure 3 is limited at this time; when the angle of the second included angle θ is smaller than 30 °, the component of parallel flow along the windward side of the heat exchanger 2 generated on the flow guiding surface 31 is larger, the air quantity flowing to the second end 22 of the heat exchanger 2 is promoted more, but because the component of parallel flow is larger, the flow component perpendicular to the heat exchanger 2 is smaller, that is, the windage resistance of the flow guiding structure 3 is increased, so that the air quantity flowing through the first end 21 of the heat exchanger 2 is seriously attenuated, but the heat exchange efficiency of the heat exchanger 2 is affected, the air flow distribution on the windward side of the heat exchanger 2 is still uneven, and the standard difference value of the air quantity distribution percentage is larger; that is, when the angle of the second included angle θ is outside the range of 30 ° to 60 °, both the flow guiding and equalizing effects of the flow guiding structure 3 are deteriorated, and the heat exchanging efficiency of the heat exchanger 2 is adversely affected.

Preferably, the heat exchanger 2 is disposed on the second side wall 12, at this time, a vortex area is formed between the first end 21 and the second side wall 12 of the heat exchanger 2, the diversion surface 31 and the windward side of the heat exchanger 2 and the second side wall 12 enclose a triangle structure together, an included angle between the first end 21 and the second side wall 12 of the heat exchanger 2 in the vortex area forms a vertex angle of the triangle structure, and the existence of the diversion surface 31 can reduce the air flow flowing into the vortex area, thereby overcoming the problems that wind resistance is caused by vortex generated at the vortex area, and the heat exchange efficiency of the heat exchanger 2 is affected by affecting the flow of air to the second end 22 of the heat exchanger 2.

As an embodiment, the flow guiding structure 3 comprises a flow guiding plate, the side of which facing away from the heat exchanger 2 forms the flow guiding surface 31. When the flow guiding structure 3 is installed, the flow guiding plate is obliquely arranged relative to the heat exchanger 2, so that the flow guiding plate can guide the air flow flowing to the first end 21 of the heat exchanger 2, wherein the flow guiding plate is of a flat plate structure in the figure.

In an embodiment not shown in the drawings, the baffle may also be curved, preferably the cross section is arc, wherein the center of the arc is located between the air inlet 11 and the baffle, and the flow guiding surface 31 of the baffle is the tangent plane at the corresponding position on the baffle, so that the airflow can gradually change the flowing direction when flowing through the curved surface by using the gradual change of the slope of the curved surface, further reducing the generation of wind resistance, and further improving the air quantity and pressure reaching the heat exchanger 2, thereby achieving the purpose of improving the heat exchange efficiency of the heat exchanger 2.

Based on the second situation that the flow guiding structure 3 is arranged at the first end 21 of the heat exchanger 2, at this time, the flow guiding plate shields part of the heat exchanger 2, so that the part of the heat exchanger 2 shielded by the flow guiding plate can perform normal heat exchange, the flow guiding plate is provided with the flow through holes 4, and the part of the gas flowing through the flow guiding plate can flow to the part of the heat exchanger 2 shielded by the flow guiding plate through the flow through holes 4, so that uniform air flow distribution of the windward side of the heat exchanger 2 is ensured, and all positions of the heat exchanger 2 can perform good heat exchange, thereby improving heat exchange efficiency.

The cross section of the overflow hole 4 can be circular, square or regular triangle, and when the overflow hole 4 is non-circular, the cross section can be converted into a circle with the diameter D according to the area equivalent.

In this embodiment, the cross section of the overflow hole 4 is circular, and the relation between the diameter D of the overflow hole 4 and the length L3 of the baffle is 0.01L3-D-0.05L3. That is to say, the diameter D of the overflow hole 4 is adjusted according to the length L3 of the guide plate, so as to ensure that the overflow surface of the overflow hole 4 can meet the heat exchange requirement of the part of the heat exchanger 2 shielded by the guide plate. Preferably, d= 0.016L3.

In order to ensure the structural strength of the baffle and the flow guiding effect on the gas, the relation between the center distance L1 of two adjacent flow-through holes 4 in the length direction of the baffle and the diameter D of the flow-through holes 4 is 1.5D.ltoreq.L1.ltoreq.3D, and preferably, L1=2D.

Similarly, in order to ensure the structural strength of the baffle and the air guiding effect, the relation between the center distance L2 of the adjacent two overflow holes 4 in the width direction of the baffle and the diameter D of the overflow hole 4 is 1.5D less than or equal to L2 less than or equal to 3D. Preferably, l2=2d.

The edge of the guide plate far away from the first end 21 is provided with a rounding structure, and the circle center of the rounding structure is positioned between the guide plate and the heat exchanger 2. The rounded corner structure is utilized to prevent gas from flowing through the guide surface 31 and accumulating at the matched position of the part, close to the second end 22, of the guide structure 3 and the heat exchanger 2, so that uniform gas distribution on the windward side of the heat exchanger 2 is ensured, and all positions of the heat exchanger 2 can perform good heat exchange, and the heat exchange efficiency is improved.

In order to ensure the flow guiding effect of the flow guiding structure 3, the flow guiding structure 3 further comprises a side plate 32, the side plate 32 is arranged at the end part of the length direction of the flow guiding plate, and the side plate 32 is in sealing fit with the flow guiding plate and/or the heat exchanger 2. The end part of the flow guiding structure 3 is sealed by the side plate 32, and all the gas can flow only through the heat exchanger 2, so that the heat exchange efficiency of the heat exchanger 2 is prevented from being influenced by leakage of the gas from the end part of the flow guiding structure 3, and the heat exchange effect of the water heater is ensured.

Likewise, in order to ensure the structural reliability of the flow guiding structure 3, the flow guiding structure 3 further comprises a bottom plate 33, the flow guiding plate is arranged on the bottom plate 33, the bottom plate 33 is arranged on the second side wall 12, the flow guiding plate is fixed on the second side wall 12 by the bottom plate 33, at this time, the fixing structure of the flow guiding plate is the fixing fit between the plate and the plate (the bottom plate 33 and the second side wall 12), the fixing effect is better, the collision damage to the heat exchanger 2 caused by the deflection and the like of the flow guiding plate due to the unreliable fixing is avoided, and the reliable heat exchange and the reliable structure of the heat exchanger 2 are ensured.

The height L4 of the diversion structure 3 is set according to actual needs, and only the bottom plate 33 of the diversion structure 3 is required to be free from interference with other structures of the water heater.

As shown in fig. 2, the heat exchanger 2 includes 18 heat exchange tubes 23, and all the heat exchange tubes 23 are respectively numbered 1 to 18 from the first end 21 to the second end 22 of the heat exchanger 2, the arrow on the left side and the numbers 1 to n in fig. 2 indicate the labeling directions of the heat exchange tubes 23, wherein the lowest heat exchange tube 23 is numbered 1, the uppermost heat exchange tube 23 is numbered 18, then the heat exchanger 2 is divided into 18 equal parts according to the numbers of the heat exchange tubes 23 and the positions of the heat exchange tubes 23, and on the premise of the same fan air quantity and power, the angles (30 ° scheme, 45 ° scheme and 60 ° scheme) of adjusting the first included angle α after the air guide structure 3 is not arranged (before installation) are respectively selected to obtain the data of the air quantity distribution on the heat exchanger 2, as follows:

From the above simulation structure, the standard deviation of the windward side of the heat exchanger 2 in the water heater without the diversion structure 3 is 2.34, and the standard deviation of the windward side of the heat exchanger 2 in the water heater with the diversion structure 3 is less than 2, thereby proving that the diversion structure 3 can effectively promote the uniformity of the air distribution of the windward side of the heat exchanger 2.

Moreover, as can be seen by adjusting the angle of the first included angle alpha, when the angle of the first included angle alpha is 45 degrees, the standard deviation value of the windward side of the heat exchanger 2 reaches the minimum value, which is reduced by 44.87 percent relative to the standard deviation value of the windward side of the heat exchanger 2 in the water heater without the diversion structure 3, and the simulated air quantity difference is 0.4 percent, which is basically negligible;

when the angle of the first included angle alpha is reduced to 30 degrees or increased to 60 degrees, the standard deviation value starts to be increased, which indicates that the uniformity degree of the airflow on the windward side of the heat exchanger 2 starts to be weakened at the moment, but the standard deviation value is smaller than 2, and the heat exchange efficiency of the heat exchanger 2 can be still increased.

The foregoing examples illustrate only a few embodiments of the utility model and are described in detail herein without thereby limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. A water heater, characterized in that: comprising the following steps:

The device comprises a shell (1), wherein an air inlet (11) is formed in the shell (1);

the heat exchanger (2) is arranged in the shell (1);

The air guide structure (3), the air guide structure (3) set up in the casing (1), heat exchanger (2) have keep away from first end (21) of air intake (11) and with second end (22) that first end (21) is relative, air guide structure (3) set up in first end (21) department, just air guide structure (3) can make at least partial gas in casing (1) to second end (22) of heat exchanger (2) flow.

2. The water heater as recited in claim 1, wherein: the heat exchanger (2) comprises at least two heat exchange tubes (23), and all the heat exchange tubes (23) are arranged in parallel along the direction from the first end (21) to the second end (22).

3. The water heater as recited in claim 1, wherein: the shell (1) comprises a first side wall and a second side wall (12) which are opposite to each other, the air inlet (11) is formed in the first side wall, and the part, away from the air inlet (11), of the flow guide structure (3) is formed in the second side wall (12).

4. A water heater as claimed in claim 3, wherein: the flow guiding structure (3) is provided with a flow guiding surface (31), and a plane where the flow guiding surface (31) is positioned and a windward side of the heat exchanger (2) form a first included angle alpha; and/or the plane of the flow guiding surface (31) and the plane of the second side wall (12) have a second included angle theta.

5. The water heater as recited in claim 4, wherein: the angle range of the first included angle alpha is 30-60 degrees; and/or, the second included angle θ is in the range of 30 ° to 60 °.

6. The water heater as recited in claim 4, wherein: the flow guiding structure (3) comprises a flow guiding plate, and the side surface of the flow guiding plate, which is far away from the heat exchanger (2), forms the flow guiding surface (31).

7. The water heater as recited in claim 6, wherein: the flow guide plate shields part of the heat exchanger (2), and the flow guide plate is provided with an overflow hole (4).

8. The water heater as recited in claim 7, wherein: the cross section of the overflow hole (4) is circular, and the relation between the diameter D of the overflow hole (4) and the length L3 of the guide plate is 0.01L3-0.05L3;

And/or, the relation between the center distance L1 of two adjacent overflow holes (4) in the length direction of the guide plate and the diameter D of the overflow holes (4) is 1.5D.ltoreq.L1.ltoreq.3D;

And/or the relation between the center distance L2 of two adjacent overflow holes (4) in the width direction of the guide plate and the diameter D of the overflow holes (4) is 1.5D-L2-3D.

9. The water heater as recited in claim 6, wherein: the edge of the guide plate far away from the first end (21) is provided with a rounding structure, and the circle center of the rounding structure is positioned between the guide plate and the heat exchanger (2).

10. The water heater as recited in claim 6, wherein: the flow guide structure (3) further comprises a side plate (32), the side plate (32) is arranged at the end part of the flow guide plate in the length direction, and the side plate (32) is in sealing fit with the flow guide plate and/or the heat exchanger (2); and/or, the flow guiding structure (3) further comprises a bottom plate (33), the flow guiding plate is arranged on the bottom plate (33), and the bottom plate (33) is arranged on the second side wall (12).