Double-air-duct warm air blower

Abstract

The utility model discloses a double-air-duct warm air blower, which comprises a shell, a first air duct, a second air duct and a mixed air cavity, wherein the shell is provided with the first air duct, the second air duct and the mixed air cavity; the tail end of the first air duct and the tail end of the second air duct are both communicated with the mixed air cavity; the shell is provided with an air outlet communicating with the mixed air cavity. A first fan and a heating assembly are arranged in the first air duct; the first fan is used for conveying hot air generated by heating of the heating assembly to the mixed air cavity and blowing the hot air outwards; a second fan is arranged in the second air duct; and the second fan is used for conveying external air into the mixed air cavity and blowing out hot air in the mixed air cavity together through the air outlet. According to the utility model, the two air channels are converged in the mixed air cavity and then are subjected to tangential air output, so that concentrated and strong hot air flow can be formed, the heating distance and the air speed are increased, and efficient heat flow circulation and remote heating effects are realized; by means of the two-air-duct shunting design, the hot air rising problem can be effectively relieved, indoor temperature balance is kept, and airflow impact noise can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of heater technology, and in particular to a dual-duct heater. Background Technology

[0002] A fan heater is a device used in homes or commercial settings to deliver warm air and raise the ambient temperature for heating purposes. Typically, a fan heater consists of a PTC (Positive Temperature Coefficient) heater, a resistance wire, and other heating elements, with a fan blowing the warm air generated by the heating elements outwards.

[0003] However, because the heating device obstructs the airflow, the fan's air pressure is insufficient, resulting in a short heating distance and difficulty in covering large spaces. This makes it difficult to heat up quickly and leads to heat accumulation and energy waste. To increase air pressure, the fan is often designed with high speed, but this results in significant noise. Furthermore, hot air rises rapidly, making it difficult to maintain horizontal airflow and leading to poor heating efficiency. Therefore, although some space heaters with multi-speed fan adjustment have appeared on the market to address these issues, they have not effectively solved the problems of heating distance and heat distribution uniformity.

[0004] Therefore, it is necessary to provide a dual-duct warm air heater to overcome the above-mentioned defects. Utility Model Content

[0005] The purpose of this invention is to provide a dual-duct warm air heater, which aims to improve the problems of short heating distance and uneven heat flow in existing warm air heaters, increase heating distance and air speed, and reduce operating noise.

[0006] To achieve the above objectives, this utility model provides a dual-duct warm air blower, comprising: a housing having a first duct, a second duct, and a mixing chamber;

[0007] The ends of the first air duct and the second air duct are both connected to the mixing air cavity;

[0008] The housing has an air outlet that communicates with the mixing air chamber;

[0009] The first air duct is equipped with a first fan and a heating component; the first fan is used to deliver the hot air generated by the heating component to the mixing air cavity and blow it outward.

[0010] The second air duct is equipped with a second fan; the second fan is used to deliver outside air into the mixing air chamber and to blow the hot air in the mixing air chamber out through the air outlet.

[0011] In a preferred embodiment, the housing includes a first cylindrical wall and a second cylindrical wall; the first air duct is opened in the first cylindrical wall, and the first fan and the heating component are both located inside the first cylindrical wall; the air outlet is located on one side of the second cylindrical wall, and the second cylindrical wall has an air inlet on the side away from the air outlet; the first cylindrical wall is located inside the second cylindrical wall.

[0012] In a preferred embodiment, the second cylindrical wall includes an air inlet section, a first connecting section, a fixed section, a second connecting section, and an air outlet section that are connected sequentially and pass through both ends; the first cylindrical wall is located in the fixed section, the mixing air cavity is located in the second connecting section, and the air outlet is located in the air outlet section.

[0013] In a preferred embodiment, a gap is formed between the outer surface of the first cylinder wall and the inner wall of the fixed section, so that the second air duct is arranged around the first air duct at the position of the fixed section.

[0014] In a preferred embodiment, the central axis of the air inlet section, the central axis of the first connecting section, and the central axis of the fixed section are all located on the same straight line, or the central axis of the air inlet section is fixed at a predetermined angle to the central axis of the fixed section by bending the first connecting section.

[0015] In a preferred embodiment, the first cylinder wall has a first air inlet on the side away from the mixing air chamber, and / or a second air inlet at a preset position that communicates with the outside but not with the inside of the second air duct; the first air inlet is used to allow air entering from the air inlet to enter the first air duct; the first fan drives the air entering from the first air inlet and / or the second air inlet to flow to the mixing air chamber after passing through the heating component.

[0016] In a preferred embodiment, the air inlet section is provided with a protective cover at the air inlet, and the second fan is fixed inside the air inlet section.

[0017] In a preferred embodiment, the air outlet section is provided with a guide hood at the air outlet, and the air in the mixing chamber forms an air jet after flowing through the guide hood.

[0018] In a preferred embodiment, both the fixed section and the first cylinder wall are cylindrical, and the side of the first cylinder wall closest to the air inlet section is spherical.

[0019] In a preferred embodiment, the heating element is a ceramic PTC heating element.

[0020] This utility model provides a dual-duct heater that features two independent ducts within the casing, driven by separate fans, creating a dual airflow output. The first duct pushes out hot air, generating a powerful hot air output; the second duct outputs ambient temperature air, creating strong air pressure and enhancing heating distance and airflow speed. Simultaneously, the two ducts converge in a mixing chamber and then cut off the airflow, forming a concentrated and powerful hot air stream with a speed of 3-4 meters per second, further increasing heating distance and airflow speed. This achieves efficient heat circulation and long-range heating, extending the heating range to 2-3 meters, making it suitable for large spaces. For example, in a 10-square-meter room, it can raise the temperature to 24°C within 5 minutes. Furthermore, the dual-duct design effectively mitigates the problem of rising hot air, maintaining a balanced indoor temperature and reducing airflow noise, keeping it within 40-55 decibels, making it suitable for home and office environments. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A perspective view of the dual-duct warm air heater provided by this utility model;

[0023] Figure 2 for Figure 1 A three-dimensional view of the dual-duct heater from another angle;

[0024] Figure 3 for Figure 1 An exploded 3D view of the dual-duct warm air heater shown.

[0025] Figure 4 for Figure 3 An exploded 3D view of the dual-duct heater from another angle;

[0026] Figure 5 for Figure 1 The diagram shows a longitudinal section of a dual-duct warm air heater.

[0027] The diagram is labeled as follows: 100, Dual-duct heater; 102, First duct; 101, Second duct; 103, Mixing chamber; 104, Air outlet; 105, Air inlet.

[0028] 10. Shell; 11. First cylindrical wall; 111. First air inlet; 112. Second air inlet; 12. Second cylindrical wall; 121. Air inlet section; 122. First connecting section; 123. Fixing section; 124. Second connecting section; 125. Air outlet section;

[0029] 21. First fan; 22. Heating component; 31. Second fan; 41. Protective cover; 42. Air guide shroud. Detailed Implementation

[0030] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described in this specification are merely for explaining the present utility model and are not intended to limit the present utility model.

[0031] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0032] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0033] In an embodiment of this utility model, a dual-duct heater 100 is provided, which achieves efficient heat flow circulation and long-distance heating effect by setting two independent air ducts and a dual-fan configuration inside the unit body.

[0034] like Figures 1-5 As shown, the dual-duct warm air heater 100 includes a housing 10 having a first air duct 102, a second air duct 101, and a mixing chamber 103. The housing 10 has an air outlet 104 communicating with the mixing chamber 103.

[0035] The ends of the first air duct 102 and the second air duct 101 are both connected to the mixing chamber 103. That is, the air flow delivered by the first air duct 102 and the air flow delivered by the second air duct 101 merge in the mixing chamber 103 and are then output through the air outlet 104, making the hot air more concentrated and the flow rate higher, thus forming a long-distance heating effect.

[0036] Specifically, the first air duct 102 is equipped with a first fan 21 and a heating component 22. The first fan 21 is used to transport the hot air generated by the heating component 22 to the mixing air chamber 103 and blow it outward, that is, the first fan 21 is responsible for pushing the hot air flow to form a strong hot air output. The heating component 22 includes, but is not limited to, devices with heating functions such as ceramic PTC heating elements, resistance wires, and heating films. Preferably, the heating component 22 uses a ceramic PTC heating element, which has self-limiting temperature characteristics, rapid heating, and uniform and continuous hot air output, ensuring a stable heating effect. It should be noted that the specific structure and implementation principle of the ceramic PTC heating element can be referred to in the prior art, and will not be elaborated here.

[0037] A second fan 31 is installed within the second air duct 101. The second fan 31 can be a pressure fan design, used to deliver outside air into the mixing chamber 103, and to blow the hot air from the mixing chamber 103 out through the air outlet 104. The second fan 31 mainly plays an auxiliary role, enhancing the heating distance and air velocity of the warm air output from the air outlet 104 by outputting ambient temperature air through the peripheral second air duct 101. Therefore, the two fans, one in front and one behind, operate in coordination, and uniform air distribution can be achieved through synchronous control. Both the first fan 21 and the second fan 31 can use noise-reducing fan blades.

[0038] Combination Figures 3-5 As shown, the shell 10 includes a first cylindrical wall 11 and a second cylindrical wall 12. Both the first cylindrical wall 11 and the second cylindrical wall 12 are hollow structures, and their cross-sections can be independently circular, rectangular, or polygonal, etc. They can be obtained by making the cross-section extend vertically along a line (usually, this line is the central axis of the structure), and the material can be conventional plastic.

[0039] The first air duct 102 is formed in the first cylinder wall 11, and the first fan 21 and the heating component 22 are both located inside the first cylinder wall 11. The first fan 21 blows nearby air toward the heating component 22, thereby carrying the hot air heated by the heating component 22 out into the mixing chamber 103.

[0040] An air outlet 104 is located on one side of the second cylindrical wall 12, and an air inlet 105 is provided on the side of the second cylindrical wall 12 away from the air outlet 104. The first cylindrical wall 11 is located inside the second cylindrical wall 12.

[0041] Specifically, the second cylindrical wall 12 includes an air inlet section 121, a first connecting section 122, a fixed section 123, a second connecting section 124, and an air outlet section 125, which are connected in sequence and pass through both ends. The first cylindrical wall 11 is located in the fixed section 123, the mixing chamber 103 is located in the second connecting section 124, and the air outlet 104 is located in the air outlet section 125.

[0042] Furthermore, the air inlet section 121 is equipped with a protective cover 41 at the air inlet 105, and the second fan 31 is fixed inside the air inlet section 121. The protective cover 41 can prevent larger debris from entering the second air duct 101.

[0043] Furthermore, the air outlet section 125 is equipped with a guide hood 42 (air guide mesh) at the air outlet 104. Airflow within the mixing chamber 103 forms an air jet after passing through the guide hood 42. Therefore, by setting up the silent guide hood 42, wind noise can be reduced, and the converging airflow within the mixing chamber 103 can be guided outwards evenly to form an air jet, making the hot air more concentrated and with a higher velocity, effectively improving the heating effect and wind speed stability, thereby effectively alleviating the problem of hot air rising and maintaining a balanced indoor temperature.

[0044] Combination Figure 5 As shown, a gap is formed between the outer surface of the first cylindrical wall 11 and the inner wall of the fixed section 123, so that the second air duct 101 is arranged around the first air duct 102 at the position of the fixed section 123. In this embodiment, both the fixed section 123 and the main body of the first cylindrical wall 11 are cylindrical, and the diameter of the fixed section 123 is larger, so that the air in the second air duct 101 can surround the first air duct 102 from the outside. Thus, when the air flows into the mixing chamber 103, the air in the second air duct 101 can surround and cover the hot air in the first air duct 102 from the outside, thereby forming a strong wind pressure. It can also drive the hot air from all angles to be ejected vertically from the air outlet 104, preventing the hot air from deviating from the ejection at certain angles and maintaining horizontal air delivery, so as to achieve a longer heating distance and a more stable heat flow output.

[0045] Furthermore, both the fixed section 123 and the first cylindrical wall 11 are cylindrical, and the side of the first cylindrical wall 11 closest to the air inlet section 121 is spherical. That is, the gap between the fixed section 123 and the first cylindrical wall 11 gradually decreases, forming a guiding structure, so that when the air in the second air duct 101 blows to the middle of the first cylindrical wall 11, it can slide outwards, reducing the obstruction effect of the first cylindrical wall 11 on the airflow in the second air duct 101.

[0046] In one embodiment, the central axis of the air inlet section 121, the central axis of the first connecting section 122, and the central axis of the fixing section 123 are all located on the same straight line, thus forming an elongated structure. In another embodiment, the central axis of the air inlet section 121 is fixed at a predetermined angle to the central axis of the fixing section 123 by bending the first connecting section 122, for example, the air inlet section 121 is perpendicular to the fixing section 123, forming a vertically bent structure.

[0047] In an embodiment of this utility model, a first air inlet 111 is provided on the side of the first cylindrical wall 11 away from the mixing chamber 103. This first air inlet 111 can be located in the spherical surface of the first cylindrical wall 11 near the air inlet section 121, and is composed of multiple round holes, square holes, or strip-shaped holes. The first air inlet 111 is used to allow air entering from the air inlet 105 to enter the first air duct 102, meaning the first air duct 102 can both receive supplemental air from the second air duct 101 and prevent impurities from entering the first air duct 102. The first cylindrical wall 11 can also have a second air inlet 112 at a preset position, communicating with the outside but not with the inside of the second air duct 101. For example, the side wall of the first cylindrical wall 11 can be connected to the outside through an air inlet pipe passing through a fixed section 123, forming the air inlet portion of the first air duct 102. Therefore, the first fan 21 drives the air entering from the first air inlet 111 and / or the second air inlet 112 to flow into the mixing chamber 103 after passing through the heating assembly 22.

[0048] During operation, the opening and closing of the first fan 21 and the second fan 31, as well as the speed adjustment, and the opening and closing of the heating element 22 can all be remotely controlled via the intelligent control module. For example, users can adjust the fan speed, temperature, and timer via the control panel or remote control. After receiving the signal, the intelligent control module of the heater controls the output power of the two fans and the heating element 22 to ensure constant temperature and low noise operation.

[0049] In summary, the dual-duct heater 100 provided by this utility model forms a dual airflow output by setting independent first air duct 102 and second air duct 101 within the housing 10, and driving them respectively by first fan 21 and second fan 31. The first air duct 102 is responsible for pushing hot air, forming a strong hot air output; the second air duct 101 outputs room temperature air at the periphery, forming strong wind pressure, enhancing the heating distance and wind speed; simultaneously, the two air ducts converge in the mixing chamber 103 and then cut the airflow, forming a concentrated and powerful hot air flow with a wind speed of 3-4 meters per second, further improving the heating distance and wind speed, achieving efficient heat flow circulation and long-distance heating effect, extending the heating range to 2-3 meters, suitable for use in large spaces. For example, in a 10-square-meter room, the temperature can be raised to 24°C within 5 minutes. In addition, the dual-duct design effectively alleviates the problem of hot air rising, maintains a balanced indoor temperature, and effectively reduces airflow impact noise, keeping the noise level within 40-55 decibels, making it suitable for home and office environments.

[0050] This invention is not limited to the description in the specification and embodiments. Therefore, other advantages and modifications can be readily realized by those skilled in the art. Thus, without departing from the spirit and scope of the general concept as defined by the claims and their equivalents, this invention is not limited to the specific details, representative devices and illustrated examples shown and described herein.

Claims

1. A double duct air heater characterized by, include: A housing having a first air duct, a second air duct, and a mixing air chamber; The ends of the first air duct and the second air duct are both connected to the mixing air cavity; The housing has an air outlet that communicates with the mixing air chamber; The first air duct is equipped with a first fan and a heating component; the first fan is used to deliver the hot air generated by the heating component to the mixing air cavity and blow it outward. The second air duct is equipped with a second fan; the second fan is used to deliver outside air into the mixing air chamber and to blow the hot air in the mixing air chamber out through the air outlet.

2. The double duct air heater as set forth in claim 1, wherein The housing includes a first cylindrical wall and a second cylindrical wall; the first air duct is opened in the first cylindrical wall, and the first fan and the heating component are both located inside the first cylindrical wall; the air outlet is located on one side of the second cylindrical wall, and the second cylindrical wall has an air inlet on the side away from the air outlet; the first cylindrical wall is located inside the second cylindrical wall.

3. The double duct air heater as set forth in claim 2, wherein The second cylindrical wall includes an air inlet section, a first connecting section, a fixed section, a second connecting section, and an air outlet section that are connected in sequence and pass through both ends; the first cylindrical wall is located in the fixed section, the mixing air cavity is located in the second connecting section, and the air outlet is located in the air outlet section.

4. The double duct air heater as set forth in claim 3, wherein A gap is formed between the outer surface of the first cylinder wall and the inner wall of the fixed section, so that the second air duct is arranged around the first air duct at the position of the fixed section.

5. The double duct air heater as set forth in claim 3, wherein The central axis of the air inlet section, the central axis of the first connecting section, and the central axis of the fixed section are all located on the same straight line, or the central axis of the air inlet section is fixed at a predetermined angle to the central axis of the fixed section by bending the first connecting section.

6. The double duct air heater as set forth in claim 3, wherein The first cylinder wall has a first air inlet on the side away from the mixing air chamber, and / or a second air inlet at a preset position that communicates with the outside but does not communicate with the inside of the second air duct; the first air inlet is used to allow air entering from the air inlet to enter the first air duct; the first fan drives the air entering from the first air inlet and / or the second air inlet to flow to the mixing air chamber after passing through the heating component.

7. The double duct air heater as set forth in claim 3, wherein The air inlet section is equipped with a protective cover at the air inlet, and the second fan is fixed inside the air inlet section.

8. The double duct air heater as set forth in claim 3, wherein The air outlet section is provided with a guide hood at the air outlet, and the air in the mixing air cavity forms an air jet after flowing through the guide hood.

9. The double duct air heater as set forth in claim 3, wherein Both the fixed section and the first cylinder wall are cylindrical, and the side of the first cylinder wall closest to the air inlet section is spherical.

10. The double duct air heater as set forth in claim 1, wherein The heating element is a ceramic PTC heating element.

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