Centrifugal ring-shaped multi-functional heater

Abstract

This utility model provides a centrifugal annular multifunctional heater, belonging to the field of fresh air ventilation heating appliances. It includes a body, a centrifugal fan, a heating element, a switching valve assembly, and a control assembly. The body contains an air inlet chamber, forming an annular air duct between the air inlet chamber and the inner wall of the body. The body also has an air inlet, an air exchange outlet, and a hot air outlet. The air exchange outlet and the hot air outlet are connected to the annular air duct, and the air inlet is connected to the air inlet chamber. The centrifugal fan is located within the air inlet chamber, and its outlet is connected to the annular air duct, with the fan's outlet direction corresponding to the extension direction of the annular air duct. The heating element is located at the hot air outlet. The switching valve assembly is located within the annular air duct and opens / closes at the air exchange outlet. By directly connecting the centrifugal fan's outlet to the extension direction of the annular air duct, right-angle airflow deflections are avoided, reducing turbulence and energy loss. Guide protrusions guide the airflow to flow close to the duct wall, reducing noise generated by airflow impact.

Description

Technical Field

[0001] This utility model relates to the field of fresh air exchange heating appliances, and in particular to a centrifugal ring-shaped multifunctional heater. Background Technology

[0002] In the field of fresh air ventilation and heating, whether it is a bathroom heater, kitchen heater, electric heater or air conditioner, they all use centrifugal fans to heat, blow, ventilate and dehumidify indoor air.

[0003] Centrifugal fan heaters, due to the physical characteristics of their fans, generate airflow through centrifugal ejection, resulting in an air intake direction perpendicular to the air outlet direction. Furthermore, the strong airflow from centrifugal fans easily creates turbulence in small heaters. This turbulent airflow leads to both airflow loss and noise due to impacts. Therefore, how to retain airflow while reducing airflow loss and noise in a compact heater design is a key technical problem that this invention aims to solve. Thus, this invention was developed to address this need. Utility Model Content

[0004] In view of the above, the primary problem to be solved by this utility model is how to retain airflow and reduce wind loss and wind noise in the small-size design of the heater.

[0005] Therefore, this utility model provides a centrifugal ring-shaped multifunctional heater, comprising: The fuselage includes an air intake chamber, which forms an annular air duct with the inner wall of the fuselage. The fuselage also includes an air inlet, an air exchange inlet, and a hot air outlet. The air exchange inlet and the hot air outlet are connected to the annular air duct, and the air inlet is connected to the air intake chamber. A centrifugal fan is installed inside the air inlet chamber, and the outlet end of the centrifugal fan is connected to the annular air duct. The outlet direction of the centrifugal fan corresponds to the extension direction of the annular air duct. A heating component is disposed at the hot air outlet; A switching valve assembly; the switching valve assembly is located within the annular air duct and opens / closes at the air exchange port; A control component is located inside the machine body and controls the centrifugal fan, the heating component, and the switching valve component.

[0006] Preferably, the fuselage is provided with a partition, one side of which forms the air intake chamber with the fuselage, and the other side of which forms the annular air duct with the fuselage.

[0007] Preferably, the partition is an arc-shaped plate, the inner side of the arc-shaped plate and the fuselage form the air intake compartment, and the outer side of the arc-shaped plate and the fuselage form the annular air duct.

[0008] Preferably, the air inlet chamber and the annular air duct are connected through a connecting port, the switching valve assembly is located at the connecting port, the air exchange port is close to the connecting port, and the switching valve assembly selectively realizes at least the following two states: The switching valve assembly opens / closes at the air exchange port; The switching valve assembly opens / closes the communication port.

[0009] Preferably, at least one flow-guiding protrusion is formed on the outer side of the partition, and the flow-guiding protrusion forms an attached flow-guiding surface facing the annular air duct.

[0010] Preferably, one end of the attached guide surface is close to the connecting port, and the other end corresponds to the tail of the annular air duct.

[0011] Preferably, the wall-mounted guide surface includes a steep section near the communication port and a gentle section away from the communication port.

[0012] Preferably, the body is cylindrical, and the cylindrical body includes a top plate, a bottom plate and side panels, with the air inlet and the hot air outlet located on the top plate and the air exchange outlet located on the side panels.

[0013] Preferably, the hot air outlet is an arc-shaped hot air outlet, which is located above the annular air duct and connected to the annular air duct.

[0014] Preferably, the switching valve assembly includes at least a motor and a valve, the valve being rotatably mounted on the machine body via a rotating shaft, and the motor being driven by the rotating shaft.

[0015] The above technical solutions can be expressed individually or in combination to achieve the following beneficial effects: Reduce wind loss and wind noise: Annular air duct design: The outlet of the centrifugal fan is directly connected to the extension direction of the annular air duct to avoid right-angle turns of airflow and reduce turbulence and energy loss; Wall-mounted guide surface (Coanda effect): The guide protrusions (steep section + gentle section) on the outside of the baffle guide the airflow to flow close to the duct wall, reducing the noise generated by airflow impact.

[0016] Compact space utilization for high efficiency: Arc-shaped partition divides the space: The interior of the fuselage is divided into an air intake chamber and an annular air duct by an arc-shaped partition, which maximizes the use of the internal space of the cylindrical fuselage and achieves a miniaturized design; Annular duct static pressure enhancement: The airflow forms a static pressure cavity within the annular duct, improving the uniformity and stability of the airflow. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a front view of the structure of this utility model.

[0019] Figure 3 This is a side view of the structure of this utility model.

[0020] Figure 4 yes Figure 3 Cross-sectional view at point AA.

[0021] Figure 5 yes Figure 3 A stereoscopic view.

[0022] Figure 6 This is a schematic diagram of the valve closure ventilation port in this utility model.

[0023] Figure 7 This is a schematic diagram of the ventilation function of this utility model.

[0024] Figure 8 This is a schematic diagram of the hot air function of this utility model.

[0025] Figure 9 This is a schematic diagram of the dual-function ventilation and hot air system of this utility model.

[0026] The components include: 1. Body; 101. Air inlet; 102. Air exchange outlet; 103. Hot air outlet; 11. Top plate; 12. Side panel; 13. Bottom plate; 14. Air inlet chamber; 15. Annular air duct; 16. Connecting port; 2. Centrifugal fan; 20. Air outlet; 3. Guide protrusion; 30. Attached guide surface; 301. Steep section; 302. Gentle section; 4. Switching valve assembly; 41. Valve; 5. Heating assembly. Detailed Implementation

[0027] The following description is provided to enable those skilled in the art to implement and use the present invention and to incorporate it into specific application contexts. Various modifications and uses in different applications will be readily apparent to those skilled in the art, and the general principles defined herein are applicable to a wide range of embodiments. Therefore, the present invention is not limited to the embodiments given herein, but should be granted the broadest scope consistent with the principles and novel features disclosed herein.

[0028] In the following detailed description, numerous specific details are set forth to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that practice of the present invention is not necessarily limited to these specific details. In other words, well-known structures and devices are shown in block diagram form without detailed representation to avoid obscuring the present invention.

[0029] Readers should note all documents and references submitted concurrently with this specification and open to public inspection, the contents of which are incorporated herein by reference. Unless otherwise expressly stated, all features disclosed in this specification (including any appended claims, abstracts, and drawings) may be replaced by alternative features for the same, equivalent, or similar purposes. Therefore, unless explicitly stated otherwise, each disclosed feature is merely one example of a set of equivalent or similar features.

[0030] Note that, where used, the markings left, right, front, back, top, bottom, front, back, clockwise, and counterclockwise are merely for convenience and do not imply any specific fixed direction. In fact, they are used to reflect the relative position and / or orientation between different parts of an object. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Note that, in practice, "further," "preferably," "even further," and "more preferably" are simply starting points for describing another embodiment based on the foregoing embodiments. The combination of the content following "further," "preferably," "even further," or "more preferably" with the foregoing embodiments constitutes the complete configuration of another embodiment. Any combination of several "further," "preferably," "even further," or "more preferably" settings following the same embodiment can form yet another embodiment.

[0033] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0034] Please refer to Figures 1-6This embodiment describes a centrifugal annular multifunctional heater, including a body 1, a centrifugal fan 2, a heating element 5, a switching valve assembly 4, and a control assembly. The body 1 has an air inlet chamber 14, forming an annular air duct 15 between the air inlet chamber 14 and the inner wall of the body 1. The body 1 also has an air inlet 101, an air exchange port 102, and a hot air outlet 103. The air exchange port 102 and the hot air outlet 103 are connected to the annular air duct 15, and the air inlet 101 is connected to the air inlet chamber 14. The centrifugal fan 2 is located within the air inlet chamber 14, and its outlet 20 is connected to the annular air duct 15. The air outlet direction of the centrifugal fan 2 corresponds to the extension direction of the annular air duct 15. The heating element 5 is located at the hot air outlet 103. The switching valve assembly 4 is located within the annular air duct 15 and opens / closes the air exchange port 102. The control assembly is located within the body 1 and controls the centrifugal fan 2, the heating element 5, and the switching valve assembly 4.

[0035] In a preferred embodiment of this invention, the body 1 is cylindrical, comprising a top plate 11, a bottom plate 13, and side panels 12. An air inlet 101 and a hot air outlet 103 are located on the top plate 11, and an air exchange outlet 102 is located on the side panels 12. Furthermore, the top plate 11 and the bottom plate 13 are circular plates, and the body 1 can be formed using a mold; details will not be elaborated here.

[0036] Furthermore, a partition is installed inside the fuselage 1, which mainly divides the space inside the fuselage 1 into two chambers: one is an air intake chamber 14, and the other is an air outlet plenum chamber, also known as an annular air duct 15. The air intake chamber 14 and the annular air duct 15 are connected at least at their relatively close ends, so that the air from the air intake chamber 14 can be guided into the annular air duct 15 to enter a static pressure state.

[0037] Specifically, one side of the bulkhead forms an air intake compartment 14 with the fuselage 1, and the other side forms an annular air duct 15 with the fuselage 1. Furthermore, the bulkhead is an arc-shaped plate, with the inner side of the arc-shaped plate forming the air intake compartment 14 with the fuselage 1, and the outer side of the arc-shaped plate forming an annular air duct 15 with the fuselage 1.

[0038] As described above, the air inlet 14 is connected to the annular air duct 15. To achieve this, the air inlet 14 and the annular air duct 15 are connected through a connecting port 16. Furthermore, this connecting port 16 is formed between the end of the partition and the inner wall of the fuselage 1, and the outlet end 20 of the centrifugal fan 2 corresponds to this connecting port 16, which is also the beginning of the annular air duct 15. Specifically, the outlet direction of the centrifugal fan 2 corresponds to the extending direction of the beginning of the annular air duct 15, thereby reducing the impact of the airflow at the connecting port 16 (i.e., the beginning of the annular air duct 15).

[0039] Correspondingly, the hot air vent 103 is preferably an arc-shaped hot air vent 103, which is located above the annular air duct 15 and connected to the annular air duct 15, thereby obtaining the maximum area of ​​the hot air vent 103.

[0040] For further details, please refer to Figure 8 and Figure 9 The heating component 5 is a PTC component, which is located at the hot air outlet 103 and can instantly heat the airflow to form warm air.

[0041] The air outlet of centrifugal fan 2 at the connection port 16 is close to the maximum air velocity at the outlet end 20 of centrifugal fan 2, and is the area most in need of turbulence. To achieve this, at least one guide protrusion 3 is formed on the outer side of the partition, forming a wall-mounted guide surface 30 facing the annular duct 15. Specifically, one end of the wall-mounted guide surface 30 is close to the connection port 16, and the other end corresponds to the tail of the annular duct 15.

[0042] Furthermore, the wall-attached guide surface 30 utilizes the Coanda Effect, also known as the wall-attachment effect or Coanda effect. Fluid (water or air) tends to deviate from its original flow direction and instead flow along a convex object surface. When there is surface friction between the fluid and the object surface it flows over, as long as the curvature is not large, the fluid will flow along the object surface. Therefore, when the airflow rushes out from the outlet 20, a portion of the airflow is pulled back by the wall-attached guide surface 30, resulting in a relatively uniform airflow entering the annular duct 15. It should be noted that this embodiment does not limit the curvature of the convex object surface. Given the known principles, those skilled in the art should be able to implement it accordingly, and any curvature within a reasonable design range can be implemented. Specifically, the wall-attached guide surface 30 includes a steep section 301 near the connecting opening 16 and a gentle section 302 away from the connecting opening 16.

[0043] In this embodiment, the ventilation and hot air functions are achieved through a switching valve assembly 4. This switching valve assembly 4 includes at least a motor and a valve 41. The valve 41 is rotatably mounted on the body 1 via a rotating shaft, and the motor drives the rotating shaft. This is a common valve 41 structure found in heaters, and will not be described in detail here. For the sake of illustrating the annular air duct 15, specific illustrations of the motor and rotating shaft are not provided in this embodiment. However, those skilled in the art should understand that the motor is located inside the body 1, the valve 41 is a valve 41 plate, one side of which is pivotally connected to the body 1 via a rotating shaft to form a rotatable structure, and the motor's drive shaft drives the rotation of the rotating shaft through gears or other transmission components. This is existing technology.

[0044] Furthermore, the switching valve assembly 4 is located at the connection port 16, and the air exchange port 102 is close to the connection port 16. The switching valve assembly 4 can selectively achieve at least the following two states: The switching valve assembly 4 opens / closes at the air exchange port 102; Switch valve assembly 4 to open / close the connection port 16.

[0045] Specifically, when the switching valve assembly 4 is closed at the air exchange port 102, the connecting port 16 is opened, and the airflow from the centrifugal fan 2 enters the annular air duct 15 through the connecting port 16, and then blows air through the hot air outlet 103, which is the cooling function at this time; Figure 8 As shown, based on the cooling function, the control component controls the heating component 5 to operate, heating the airflow from the hot air outlet 103 to form hot air; this is the hot air function. When the switching valve component 4 is closed at the connecting port 16, the ventilation port 102 is opened, as shown... Figure 7 As shown, the airflow from centrifugal fan 2 enters the ventilation port 102 through the connecting port 16. The ventilation port 102 is then discharged outdoors through a pipe. This allows indoor air to be drawn in through the air inlet 101 and discharged through the ventilation port 102, thus achieving ventilation. When valve 41 of the switching valve assembly 4 is located between the connecting port 16 and the ventilation port 102, as shown... Figure 9 As shown, both the connecting port 16 and the air exchange port 102 are open at this time, so the functions of air exchange and air outlet can be realized simultaneously.

[0046] It should be noted that this application does not involve the design and improvement of circuits. The control component is an integrated circuit board, which is located inside the body 1 (the integrated circuit board is not shown in the figure to facilitate the expression of the space inside the body 1), as should be known by those skilled in the art.

[0047] The beneficial effects of this embodiment are: Reduce wind loss and wind noise: Annular air duct 15 design: The outlet end 20 of the centrifugal fan 2 is directly connected to the extension direction of the annular air duct 15 to avoid right-angle turn of airflow and reduce turbulence and kinetic energy loss; Wall-mounted guide surface 30 (Coanda effect): The guide protrusions 3 (steep section 301 + gentle section 302) on the outside of the partition guide the airflow to flow close to the duct wall, reducing the noise generated by airflow impact.

[0048] Compact space utilization for high efficiency: Arc-shaped partition divides the space: The interior of the fuselage 1 is divided into an air intake chamber 14 and an annular air duct 15 by an arc-shaped partition, which maximizes the use of the internal space of the cylindrical fuselage 1 and achieves miniaturization design; Static pressure enhancement in annular duct 15: The airflow forms a static pressure chamber within the annular duct 15, improving the uniformity and stability of the airflow.

[0049] Those skilled in the art can make various modifications to this utility model based on the above description. Therefore, without departing from the spirit of the claims, certain details in the embodiments should not be construed as limiting the utility model, and the scope of protection of this utility model shall be defined by the appended claims.

Claims

1. A centrifugal ring-shaped multi-functional heater, characterized in that, include: The fuselage has an air intake chamber inside, and an annular air duct is formed between the air intake chamber and the inner wall of the fuselage. The fuselage is also provided with an air inlet, an air exchange inlet and a hot air outlet, the air exchange inlet and the hot air outlet are connected to the annular air duct, and the air inlet is connected to the air intake compartment; A centrifugal fan is installed inside the air inlet chamber, and the outlet end of the centrifugal fan is connected to the annular air duct. The outlet direction of the centrifugal fan corresponds to the extension direction of the annular air duct. A heating component is disposed at the hot air outlet; A switching valve assembly; the switching valve assembly is located within the annular air duct and opens / closes at the air exchange port; A control component is located inside the machine body and controls the centrifugal fan, the heating component, and the switching valve component.

2. The centrifugal annular multifunctional heater according to claim 1, characterized in that, The fuselage is equipped with a partition, one side of which forms the air intake chamber with the fuselage, and the other side of which forms the annular air duct with the fuselage.

3. The centrifugal annular multifunctional heater according to claim 2, characterized in that, The partition is an arc-shaped plate, the inner side of which forms the air intake compartment with the fuselage, and the outer side of which forms the annular air duct with the fuselage.

4. The centrifugal annular multifunctional heater according to claim 3, characterized in that, The air inlet chamber and the annular air duct are connected through a connecting port. The switching valve assembly is located at the connecting port, and the air exchange port is close to the connecting port. The switching valve assembly can selectively achieve at least two of the following states: The switching valve assembly opens / closes at the air exchange port; The switching valve assembly opens / closes the communication port.

5. The centrifugal annular multifunctional heater according to claim 4, characterized in that, At least one flow-guiding protrusion is formed on the outer side of the partition, and the flow-guiding protrusion forms an attached flow-guiding surface facing the annular air duct.

6. The centrifugal annular multifunctional heater according to claim 5, characterized in that, One end of the attached guide surface is close to the connecting port, and the other end corresponds to the tail of the annular air duct.

7. The centrifugal annular multifunctional heater according to claim 6, characterized in that, The wall-mounted guide surface includes a steep section near the connection port and a gentle section away from the connection port.

8. The centrifugal annular multifunctional heater according to claim 2, characterized in that, The body is cylindrical, and the cylindrical body includes a top plate, a bottom plate and side panels. The air inlet and the hot air outlet are located on the top plate, and the air exchange outlet is located on the side panels.

9. The centrifugal annular multifunctional heater according to claim 8, characterized in that, The hot air outlet is an arc-shaped hot air outlet, which is located above the annular air duct and connected to the annular air duct.

10. The centrifugal annular multifunctional heater according to claim 1, characterized in that, The switching valve assembly includes at least a motor and a valve, the valve being rotatably mounted on the machine body via a rotating shaft, and the motor being driven by the rotating shaft.

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