Centrifugal air duct structure of warmer

Abstract

The centrifugal air duct structure comprises a shell and an end cover which are buckled and connected into an integrated structure, a circular cavity is formed in one end of the shell, a wind wheel with a motor is installed in the circular cavity, a linear air duct is formed in the other end of the shell, and the linear air duct is connected with the end cover. After air formed by the airflow enters the linear air channel, the air continuously penetrates through the air guide holes to enter the enclosure under the action of the air pressure difference of the two sides of the flow uniformizing plate until the air formed by the airflow reaches the backflow air opening and thoroughly enters the enclosure, a large amount of air can be injected into the tail end of the linear air channel, and the air flow is uniform. The air flow attenuation caused by air pressure difference reduction is made up to a certain extent, air blown out by the wind wheel can be evenly guided to the PTC heating block, and therefore the linear air outlet can always keep even air outlet in the high-power operation state and the low-power operation state of the warmer, and more comfortable warming experience is provided.

Description

Technical Field

[0001] This utility model relates to the field of heater technology, and in particular to a centrifugal air duct structure for a heater. Background Technology

[0002] A heater is a household appliance used to provide a warm indoor environment. It converts electrical energy or other forms of energy into heat energy in various ways to raise the indoor temperature.

[0003] Chinese Patent Publication No. CN116182225A discloses a linear heater for ceiling installation, comprising a heater body consisting of a housing and a housing cover. One side of the housing is enclosed by baffles to form a circular chamber, within which a motor-driven fan is installed. An air duct extends from one side of the circular chamber to the other side of the housing. A PTC base frame is installed above the air duct, and a PTC heating element is embedded within the PTC base frame. An air outlet cover is installed above the PTC heating element. The air outlet cover is embedded in the air outlet on the cover plate of the housing, and its surface is parallel to or slightly higher than the air outlet. A circular air inlet is opened on one side of the air outlet above the impeller. In the above technology, the airflow is squeezed and then discharged, which makes the air at the air outlet of the heater uniform and the air pressure and speed are high. However, the squeezed air discharge method is only suitable for high power operation. When the heater is running at low power, it will still cause uneven airflow at the air outlet of the heater. Therefore, this utility model discloses a centrifugal air duct structure for heater to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a centrifugal air duct structure for a heater, in order to solve the problem mentioned in the background art that the traditional method of extruding air from a heater is only suitable for high-power operation, and that uneven airflow at the heater outlet still occurs when the heater is operating at low power.

[0005] To achieve the above objectives, the present invention provides the following solution to the aforementioned technical problems:

[0006] A centrifugal air duct structure for a heater includes a shell and an end cap that are snapped together as an integral structure. A circular chamber is formed inside one end of the shell, and a fan with a motor is installed inside the circular chamber. A linear air duct is formed inside the other end of the shell, and the circular chamber is connected to the linear air duct. A PTC bottom frame is fixed to the top of the linear air duct with screws.

[0007] The upper side of the PTC bottom frame is fitted with a baffle for limiting the PTC heating block. A wind baffle is fixed to the side of the PTC bottom frame. A flow equalizer is fixed to the lower side of the connection between the PTC bottom frame and the wind baffle. One end of the flow equalizer is connected to the circular chamber. A return air port is reserved between the other end of the flow equalizer and the linear air duct, so that the air blown out by the impeller is evenly guided into the baffle limiting the PTC heating block after passing through the flow equalizer and the return air port.

[0008] As a further embodiment of this utility model, multiple air guide plates are fixed at equal intervals on the side of the flow equalizing plate away from the linear air duct. Multiple air guide holes are opened on one side of the air guide plate and on the flow equalizing plate, and the cross-section of the air guide plate is set in an arc-shaped structure.

[0009] As a further embodiment of this utility model, a ventilation duct is provided on one side of the connection position between the circular chamber and the linear air duct, and a stepper motor is provided at the junction of the ventilation duct and the linear air duct. The output end of the stepper motor is fixedly connected to a valve blade used to switch the connection state between the linear air duct and the ventilation duct and the circular chamber.

[0010] As a further embodiment of this utility model, a circular air inlet is provided on the end cover corresponding to the impeller, and a linear air outlet is provided on the end cover corresponding to the enclosure.

[0011] As a further embodiment of this invention, the height of the flow equalizing plate is the same as the depth of the linear air duct.

[0012] As a further embodiment of this utility model, the stepper motor is mounted on the PTC base frame.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The centrifugal air duct structure of this utility model allows the airflow to enter the linear air duct. Under the action of the air pressure difference on both sides of the flow equalizer, the air continuously passes through the air guide hole and enters the enclosure until the airflow reaches the return air inlet and completely enters the enclosure. This can inject a large amount of air at the end of the linear air duct, which to a certain extent compensates for the airflow reduction caused by the reduction of air pressure difference. This allows the air blown out by the impeller to be evenly guided to the PTC heating block, so that the linear air outlet can always maintain a uniform airflow in both high-power and low-power operation of the heater, providing a more comfortable heating experience. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0015] Figure 1 This is a structural exploded view of a centrifugal air duct structure for a heater according to this utility model;

[0016] Figure 2This is a top cross-sectional view of a centrifugal air duct structure for a heater according to this utility model;

[0017] Figure 3 This utility model relates to a centrifugal air duct structure for a heater. Figure 1 Enlarged structural diagram of the structure at point A in the diagram.

[0018] The components represented by each number in the attached diagram are listed below: 1. Housing; 11. Circular chamber; 12. Linear air duct; 13. Ventilation duct; 2. End cap; 21. Circular air inlet; 22. Linear air outlet; 3. Impeller; 4. PTC base frame; 41. Enclosure; 42. Baffle plate; 43. Flow equalizer; 431. Air guide plate; 432. Air guide hole; 44. Return air outlet; 5. Stepper motor; 6. Valve blade. Detailed Implementation

[0019] The present invention will be further described below with reference to the embodiments.

[0020] Please see Figure 1-3 This utility model provides a centrifugal air duct structure for a heater, including a shell 1 and an end cap 2 that are fastened together as an integral structure. A circular chamber 11 is formed inside one end of the shell 1, and a fan 3 with a motor is installed inside the circular chamber 11. A linear air duct 12 is formed inside the other end of the shell 1. A circular air inlet 21 is opened on the end cap 2 corresponding to the fan 3, and a linear air outlet 22 is opened on the end cap 2 corresponding to the enclosure 41.

[0021] Specifically, the impeller 3 can draw in air from the circular air inlet 21, and the air can be discharged directly from the linear air outlet 22 after passing through the PTC heating block. It is worth noting that an air outlet cover with a gradually narrowing air duct can be connected between the linear air outlet 22 and the enclosure 41. This can make the air at the heater outlet uniform and have high air pressure and speed by compressing the air, thus playing a role in secondary airflow uniformity.

[0022] Furthermore, the circular chamber 11 is connected to the linear air duct 12, and a ventilation air duct 13 is provided on one side of the connection position between the circular chamber 11 and the linear air duct 12. A stepper motor 5 is provided at the junction of the ventilation air duct 13 and the linear air duct 12. The output end of the stepper motor 5 is fixedly connected to a valve blade 6 for switching the connection state between the linear air duct 12 and the ventilation air duct 13 and the circular chamber 11.

[0023] Specifically, the stepper motor 5 can precisely control the position of the valve blade 6, thereby cutting off or connecting the linear air duct 12 and the ventilation air duct 13 to the circular chamber 11 when needed. The heater can switch between normal heating and ventilation modes. In normal heating mode, the valve blade 6 can be fully opened or closed to allow air to flow through the linear air duct 12. The heated air is discharged through the enclosure 41 and the linear air outlet 22. In ventilation mode, the valve blade 6 can be adjusted to a position so that air is discharged through the ventilation air duct 13, thereby refreshing the indoor air.

[0024] Furthermore, the stepper motor 5 is mounted on the PTC base frame 4;

[0025] Specifically, the stepper motor 5 is fixed to the PTC base frame 4 with screws, which makes it easy to install or remove the stepper motor 5, and facilitates assembly and maintenance.

[0026] Furthermore, a PTC bottom frame 4 is screwed on the upper part of the linear air duct 12. A baffle 41 for limiting the PTC heating block is embedded on the upper side of the PTC bottom frame 4. A wind baffle 42 is fixed on the side of the PTC bottom frame 4. A flow equalization plate 43 is fixed on the lower side of the connection between the PTC bottom frame 4 and the wind baffle 42. One end of the flow equalization plate 43 is connected to the circular chamber 11. A return air port 44 is reserved between the other end of the flow equalization plate 43 and the linear air duct 12 so that the air blown out by the impeller 3 is evenly guided into the baffle 41 that limits the PTC heating block after passing through the flow equalization plate 43 and the return air port 44.

[0027] Specifically, the airflow first flows in a straight line within the gap between the linear air duct 12 and the flow equalizer 43, resulting in low air resistance. During this process, air continuously passes through the air guide hole 432 and enters the enclosure 41 under the action of the air pressure difference on both sides of the flow equalizer 43. As the air pressure difference decreases, the amount of air passing through the flow equalizer 43 gradually decreases until the airflow reaches the return air outlet 44 and completely enters the enclosure 41. This can inject a large amount of air at the end of the linear air duct 12, which to some extent compensates for the airflow reduction caused by the decrease in air pressure difference. This allows the linear air outlet 22 to discharge air evenly.

[0028] Furthermore, multiple air guide plates 431 are fixed at equal intervals on the side of the flow equalization plate 43 away from the linear air duct 12. Multiple air guide holes 432 are opened on one side of the air guide plate 431 and on the flow equalization plate 43. The cross section of the air guide plate 431 is set in an arc-shaped structure.

[0029] Specifically, through multiple air guide holes 432, air can be dispersed into multiple small airflows, thereby reducing the concentration and unevenness of airflow. The arc-shaped air guide plate 431 can guide the airflow along a smoother path, which can enhance the airflow of the air guide holes 432, reduce energy loss, reduce turbulence and resistance during airflow, and improve the efficiency of airflow. Through the uniformly distributed airflow, the PTC heating block can exchange heat with the air more effectively. The uniform airflow can ensure that each part of the PTC heating block is heated evenly, thereby improving the overall heating efficiency.

[0030] Furthermore, the height of the flow equalization plate 43 is the same as the depth of the linear air duct 12;

[0031] Specifically, the flow equalizer 43 and the linear air duct 12 are closely fitted, so that the flow equalizer 43 can divide the linear air duct 12 into two air ducts, left and right.

[0032] Working principle: During use, the motor drives the impeller 3 to rotate, which can guide the external airflow into the linear air duct 12. The airflow first flows in a straight line in the gap between the linear air duct 12 and the flow equalizer 43, with low wind resistance. During this process, air continuously passes through the air guide hole 432 and enters the enclosure 41 under the action of the air pressure difference on both sides of the flow equalizer 43. As the air pressure difference decreases, the amount of air passing through the flow equalizer 43 gradually decreases until the airflow reaches the return air outlet 44 and completely enters the enclosure 41. This can inject a large amount of air at the end of the linear air duct 12, which to a certain extent compensates for the airflow reduction caused by the decrease in air pressure difference. This allows the linear air outlet 22 to output air evenly. The stepper motor 5 drives the valve blade 6 to block the linear air duct 12, and the airflow can be discharged through the ventilation air duct 13. At this time, the heater is in ventilation mode.

Claims

1. A centrifugal air duct structure for a heater, comprising a shell (1) and an end cap (2) connected as an integral structure by snap-fitting, characterized in that, A circular chamber (11) is formed inside one end of the housing (1), and a fan wheel (3) with a motor is installed inside the circular chamber (11). A linear air duct (12) is formed inside the other end of the housing (1), and the circular chamber (11) is connected to the linear air duct (12). A PTC bottom frame (4) is fixed above the linear air duct (12) with screws. The upper side of the PTC bottom frame (4) is fitted with a baffle (41) for limiting the PTC heating block. A wind baffle (42) is fixed on the side of the PTC bottom frame (4). A flow equalizer (43) is fixed on the lower side of the connection between the PTC bottom frame (4) and the wind baffle (42). One end of the flow equalizer (43) is connected to the circular chamber (11). The other end of the flow equalizer (43) is reserved with a return air port (44) between it and the linear air duct (12). This allows the air blown out by the impeller (3) to be evenly guided into the baffle (41) that limits the PTC heating block after passing through the flow equalizer (43) and the return air port (44).

2. The centrifugal air duct structure for a heater according to claim 1, characterized in that: The flow equalizer (43) has multiple air guide plates (431) fixed at equal intervals on the side away from the linear air duct (12). Each air guide plate (431) has multiple air guide holes (432) on one side of the flow equalizer (43), and the cross section of the air guide plate (431) is set in an arc shape.

3. The centrifugal air duct structure for a heater according to claim 1, characterized in that: A ventilation duct (13) is provided on one side of the connection position between the circular chamber (11) and the linear air duct (12). A stepper motor (5) is provided at the junction of the ventilation duct (13) and the linear air duct (12). A valve blade (6) is fixedly connected to the output end of the stepper motor (5) to switch the connection state between the linear air duct (12) and the ventilation duct (13) and the circular chamber (11).

4. The centrifugal air duct structure for a heater according to claim 1, characterized in that: A circular air inlet (21) is provided on the end cap (2) corresponding to the impeller (3), and a linear air outlet (22) is provided on the end cap (2) corresponding to the enclosure (41).

5. The centrifugal air duct structure for a heater according to claim 1, characterized in that: The height of the flow equalizer (43) is the same as the depth of the linear air duct (12).

6. The centrifugal air duct structure for a heater according to claim 3, characterized in that: The stepper motor (5) is mounted on the PTC base frame (4).

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