Warmer air duct switching device

Abstract

The utility model discloses a warmer air duct switching device which comprises a warmer body, a circular cavity is formed in one end of the warmer body, a wind wheel with a motor is installed in the circular cavity, a linear air duct and an air exchange air duct are further formed in the warmer body, and the linear air duct is communicated with the air exchange air duct. The linear air channel and the ventilation air channel are communicated with the circular cavity through centrifugal air channels, a switching assembly is installed at the junction position of the ventilation air channel and the linear air channel, and the switching assembly is used for driving valve blades to change the communication state of the linear air channel and the ventilation air channel with the circular cavity. The driving motor drives the round wheel to rotate, the arc-shaped outer rack is meshed with one arc-shaped inner rack, the fan-shaped plate can be driven to rotate by a certain angle, the valve blade can be deflected to block the linear air channel or the ventilation air channel, airflow can be discharged through the channel which is not blocked, and compared with the mode that a stepping motor is directly used for controlling state switching of the valve blade, operation is convenient. The manufacturing cost is lower, and the operation is more stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to a heating device technical field, especially is involved in a kind of heating device air duct switching device. BACKGROUND

[0002] The PTC ceramic used by PTC heating device is a kind of composite ceramic material, usually cooperates with fan, this material can heat rapidly after being energized, and is heated by fan and is dissipated, reaches the effect of environmental temperature rise, the advantage of PTC ceramic is that temperature rises fast, can realize directional temperature rise, compared with electric heating tube and resistance wire heating product, PTC heating device can adjust the heat power output of itself according to the change of ambient temperature, optimizes electric energy consumption, improves electric energy utilization efficiency;

[0003] Chinese patent publication No. CN116182225A discloses a linear heating device for ceiling, which comprises a heating device body composed of a box body and a box cover plate arranged above the box body. One side of the box body is surrounded by a baffle to form a circular chamber. A fan wheel with a motor is installed in the chamber. A PTC bottom frame is installed above the circular chamber. A PTC heating block is embedded in the PTC bottom frame. An air outlet upper cover is installed above the PTC heating block and embedded in an air outlet opening in the box cover plate. The surface of the air outlet upper cover is parallel or slightly higher than the air outlet opening. A circular air inlet opening is arranged above the fan wheel on one side of the air outlet opening. The above-mentioned technology can realize real-time switching between heating and ventilation states of the heating device by controlling the rotation of the valve blade with a stepping motor. However, in the case of high wind resistance load, the stepping motor is prone to control errors, which leads to incomplete contact between the valve blade and the inner wall of the air duct and leakage. Moreover, the structure design of the contact position between the valve blade and the inner wall of the air duct is unreasonable, which also causes the appearance of gaps. This leads to the overflow of high-pressure airflow in the air duct from the gaps, which seriously reduces the thermal efficiency and ventilation efficiency of the heating device during operation. Therefore, the utility model discloses a heating device air duct switching device to solve the above-mentioned problems. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of heating device air duct switching device, to solve the problem that the heating device in the background art mentioned above in the case of high wind resistance load, stepping motor is prone to control errors, which leads to incomplete contact between the valve blade and the inner wall of the air duct and leakage, and the structure design of the contact position between the valve blade and the inner wall of the air duct is unreasonable, which also causes the appearance of gaps, which leads to the overflow of high-pressure airflow in the air duct from the gaps, which seriously reduces the thermal efficiency and ventilation efficiency of the heating device during operation.

[0005] To achieve the above object, the utility model discloses the following technical solutions for solving the above technical problems: a warmer air duct switching device, including the warmer body, the warmer body one end inside forms with the circular chamber, install the wind wheel with motor in the circular chamber, the warmer body inside still forms with the linear air duct and the air exchange air duct, the linear air duct and the air exchange air duct with the circular chamber between through centrifugal air duct intercommunication, install switching assembly on the junction position of the air exchange air duct and linear air duct, switching assembly is used to drive the valve blade to change linear air duct and the air exchange air duct and the circular chamber intercommunication state,

[0006] Wherein, the centrifugal air duct's both sides each is provided with a with the valve blade end portion is abutted and meets the countersunk groove, the countersunk groove's back is all bonded fixed with magnet block, and the valve blade's end portion both sides are all fixed and embedded with iron sheet, to make the linear air duct and the air exchange air duct and the circular chamber between the intercommunication state change, the magnet block and adjacent iron sheet magnetism is attracted.

[0007] As a further scheme of the utility model, the countersunk groove towards the valve blade's one side is all bonded fixed with sealing strip, and the sealing strip is provided with vertical convex strip.

[0008] As a further scheme of the utility model, the switching assembly includes the PTC heating frame that is fixed on the linear air duct upside, the motor support is fixed on the PTC heating frame, the driving motor is fixedly installed on the motor support upper end, the output of driving motor is fixedly connected with the round wheel, and one side of the round wheel is fixedly connected with the arc external gear rack.

[0009] As a further scheme of the utility model, the switching assembly still includes the central shaft that rotates and embeds in the air exchange air duct and the linear air duct junction position, the valve blade is fixedly sheathed on the outside of the central shaft, the fan-shaped plate is fixedly connected through the PTC heating frame on the top end of the central shaft, the arc slot is seted up on the fan-shaped plate, the arc internal gear rack is seted up on the two opposite inner walls of the arc slot, and the two arc internal gear racks are engaged with the arc external gear rack in turn.

[0010] As a further scheme of the utility model, the circular air inlet is seted up on the warmer body upside corresponding the wind wheel, the linear air outlet is seted up on the warmer body upside corresponding the PTC heating frame, and the PTC heating module is built-in in the PTC heating frame.

[0011] As a further scheme of the utility model, the centrifugal air duct is gradually narrowed from the circular chamber.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] 1.The heating device air duct switching device of the utility model, when the need for ventilation, drive motor drives the rotation of the round, arc-shaped external gear rack engages one of the arc-shaped internal gear rack, can drive the sector plate to rotate a certain angle, so that the valve leaf can be deflected to the plugging linear air duct or ventilation air duct, airflow can be discharged through the unblocked channel, compared with directly using the stepper motor to control the state switching of the valve leaf, the manufacturing cost is lower, the operation is more stable, the technical difficulty is lower, and the noise and vibration can also be effectively reduced;

[0014] 2.The heating device air duct switching device of the utility model, after the valve leaf is close to the inner wall of the centrifugal air duct, the magnet block is attracted to the iron sheet, so that the valve leaf can be embedded in the countersunk groove, a streamlined air duct inner wall can be formed, the wind resistance and wind noise can be effectively reduced, and the iron sheet presses the sealing strip, so that the valve leaf and the countersunk groove are not leaked, and the heat efficiency and ventilation efficiency of the heating device during operation are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model will be further described in connection with the drawings and examples:

[0016] Figure 1 It is the structure split figure of the utility model heating device air duct switching device;

[0017] Figure 2 It is the overhead section view of the utility model heating device air duct switching device;

[0018] Figure 3 It is the structure enlarged view of the utility model heating device air duct switching device appendix Figure 1 In A place;

[0019] Figure 4 It is the structure enlarged view of the utility model heating device air duct switching device appendix Figure 1 In B place.

[0020] In the drawings, the component list represented by each sign is as follows:

[0021] 1, the heating device body;11, the circular chamber;12, the linear air duct;13, the ventilation air duct;14, the centrifugal air duct;141, the countersunk groove;142, the magnet block;143, the sealing strip;144, the convex strip;15, the circular air inlet;16, the linear air outlet;2, the fan wheel;3, the switching assembly;31, the PTC heating frame;32, the motor support;33, the drive motor;34, the round;35, the arc-shaped external gear rack;36, the center shaft;37, the sector plate;38, the arc-shaped groove;39, the arc-shaped internal gear rack;4, the valve leaf;41, the iron sheet. DETAILED DESCRIPTION

[0022] The utility model will be further described in connection with the drawings and examples:

[0023] Please refer to Figures 1-4 The utility model provides a kind of warmer air duct switching device, including warmer body 1, the one end inside of the warmer body 1 is formed with circular chamber 11, the circular chamber 11 is installed with motor's wind wheel 2, the inside of the warmer body 1 is also formed with linear air duct 12 and ventilation air duct 13, the upper side of the warmer body 1 is opened with circular air inlet 15 corresponding wind wheel 2, the upper side of the warmer body 1 is opened with linear air outlet 16 corresponding PTC heating frame 31, and PTC heating module is built-in in the PTC heating frame 31;

[0024] Specifically, wind wheel 2 is inhaled cold air by rotating from circular air inlet 15.Cold air is transmitted to PTC heating frame 31 after circular chamber 11, centrifugal air duct 14 and linear air duct 12, and enters indoor by linear air outlet 16 after heating by PTC heating module, wherein PTC heating module is a kind of ceramic material, it can rapidly heat after power on, can heat dissipation to wind, realize the effect of environmental temperature rise.

[0025] Further, the linear air duct 12 and ventilation air duct 13 are communicated with the circular chamber 11 by the centrifugal air duct 14, the centrifugal air duct 14 is gradually narrowed in width from the circular chamber 11;

[0026] Specifically, the reduction of air duct width can increase the pressure of airflow, which is beneficial to push air through the air duct and improve the thermal efficiency of the warmer, and can reduce the turbulence and noise of airflow in the air duct.

[0027] Further, each of the two sides of the centrifugal air duct 14 is provided with a countersunk groove 141 which can abut against the end of the valve vane 4, the back surface of the countersunk groove 141 is bonded and fixed with a magnet block 142, and the end of the valve vane 4 is fixedly embedded with an iron sheet 41 on both sides, so that when the communication state between the linear air duct 12 and the ventilation air duct 13 and the circular chamber 11 changes, the magnet block 142 and the adjacent iron sheet 41 are magnetically attracted to each other.

[0028] Specifically, when the communication state between the linear air duct 12 and the ventilation air duct 13 and the circular chamber 11 needs to be changed, the valve vane 4 is moved to the corresponding countersunk groove 141 position under the drive of the switching assembly 3, at this time, the magnet block 142 and the iron sheet 41 are magnetically attracted to each other, helping the valve vane 4 to be stably embedded in the countersunk groove 141, forming a seal, and the integrity of the centrifugal air duct 14 can be maintained to reduce air resistance.

[0029] Further, the side of the countersunk groove 141 towards the valve vane 4 is bonded and fixed with a sealing strip 143, and the sealing strip 143 is provided with a vertical protruding strip 144;

[0030] Specifically, the sealing strip 143 is made of rubber material and has excellent flexibility, when the convex strip 144 is in contact with the valve blade 4, the sealing strip 143 is squeezed to prevent air leakage between the two components, and ensure the heating efficiency and air exchange efficiency of the heater during operation.

[0031] Further, the switching assembly 3 is installed at the junction of the linear air duct 12 and the air exchange air duct 13, which is used to drive the valve blade 4 to change the communication state of the linear air duct 12 and the air exchange air duct 13 with the circular chamber 11, the switching assembly 3 includes a PTC heating frame 31 screwed on the upper side of the linear air duct 12, a motor bracket 32 screwed on the PTC heating frame 31, a driving motor 33 fixedly installed at the upper end of the motor bracket 32, a circular wheel 34 fixedly connected to the output end of the driving motor 33, and an arc-shaped outer gear rack 35 fixedly connected to one side of the circular wheel 34.

[0032] Specifically, the driving motor 33 is started, and through the rotation of the circular wheel 34 and the arc-shaped outer gear rack 35, the sector plate 37 is driven to rotate, thereby moving the valve blade 4 to a position blocking the linear air duct 12 or the air exchange air duct 13, so as to control the path of the air flow. Compared with directly using a stepping motor to control the state switching of the valve blade 4, this mechanism has lower manufacturing cost, more stable operation, lower technical difficulty, and can effectively reduce noise and vibration.

[0033] Further, the switching assembly 3 further includes a central shaft 36 rotatably embedded at the junction of the air exchange air duct 13 and the linear air duct 12, the valve blade 4 is fixedly sleeved on the outer side of the central shaft 36, the sector plate 37 is fixedly connected to the top end of the central shaft 36 through the PTC heating frame 31, the arc-shaped slot 38 is formed in the sector plate 37, the arc-shaped inner gear racks 39 are arranged on the two opposite inner walls of the arc-shaped slot 38, the arc-shaped outer gear rack 35 is engaged with the arc-shaped inner gear racks 39 in turn, and the center of the arc-shaped slot 38 coincides with the central shaft 36.

[0034] Specifically, when the driving motor 33 works, the circular wheel 34 drives the arc-shaped outer gear rack 35 to rotate and engage with the arc-shaped inner gear racks 39, so as to realize the rotation of the sector plate 37. By changing the position of the valve blade 4, it can be controlled whether the air flow is discharged through the linear air duct 12 or the air exchange air duct 13. It is worth noting that the arc-shaped outer gear rack 35 is engaged with the arc-shaped inner gear racks 39 in turn, and the iron sheet 41 is magnetically attracted to the magnet block 142 in the engagement gap between the two arc-shaped inner gear racks 39, which can ensure the sealing performance. The engagement gap and the magnetic attraction structure avoid the need for high-precision control of the driving motor 33, and reduce the control difficulty.

[0035] Working principle:

[0036] In use, the motor drives the wind wheel 2 to rotate, which can deliver the centrifugal wind power to the linear air duct 12. The cold air is heated by the PTC heating module in the PTC heating frame 31 when passing through the PTC heating frame 31. The hot air generated is discharged from the linear air outlet 16, which can improve the indoor temperature. When ventilation is needed, the driving motor 33 drives the circular wheel 34 to rotate, the arc-shaped external gear rack 35 engages with one of the arc-shaped internal gear racks 39, which can drive the sector plate 37 to rotate by a certain angle, so that the valve blade 4 can be deflected to block the linear air duct 12, and the airflow can be discharged outward through the ventilation air duct 13. Conversely, the valve blade 4 is deflected to block the ventilation air duct 13, and the airflow can be discharged outward through the linear air duct 12. It is worth noting that the valve blade 4 embedded in the countersunk groove 141 can form a streamlined air duct inner wall, which can effectively reduce wind resistance and wind noise. The magnet block 142 is attracted to the iron sheet 41, which can press the sealing strip 143 tightly, ensuring that the valve blade 4 and the countersunk groove 141 do not leak, and ensuring the heating efficiency and ventilation efficiency of the heater during operation.

Claims

1. A heater air duct switching device, comprising a heater body (1), characterized in that: A circular chamber (11) is formed inside one end of the heater body (1), a wind wheel (2) with a motor is installed in the circular chamber (11), and a linear air duct (12) and a ventilation air duct (13) are also formed inside the heater body (1), the linear air duct (12) and the ventilation air duct (13) are connected to the circular chamber (11) through a centrifugal air duct (14), and a switching component (3) is installed at the intersection of the ventilation air duct (13) and the linear air duct (12), and the switching component (3) is used to drive the valve blade (4) to change the communication state between the linear air duct (12) and the ventilation air duct (13) and the circular chamber (11); Wherein, a countersunk groove (141) capable of abutting against the end of the valve blade (4) is provided on each side of the centrifugal air duct (14), a magnet block (142) is bonded and fixed to the back of each countersunk groove (141), and an iron sheet (41) is fixedly embedded on both sides of the end of each valve blade (4), so that when the communication state between the linear air duct (12) and the ventilation air duct (13) and the circular chamber (11) changes, the magnet block (142) and the adjacent iron sheet (41) are magnetically attracted to each other.

2. The heater air duct switching device according to claim 1, characterized in that: A sealing strip (143) is bonded and fixed to one side of the countersunk groove (141) facing the valve blade (4), and a vertical convex strip (144) is provided on the sealing strip (143).

3. The heater air duct switching device according to claim 1, characterized in that: The switching assembly (3) comprises a PTC heating frame (31) fixed to the upper side of the linear air duct (12) by screws, a motor bracket (32) fixed to the PTC heating frame (31) by screws, a driving motor (33) fixedly mounted on the upper end of the motor bracket (32), an output end of the driving motor (33) fixedly connected to a circular wheel (34), and an arc-shaped external rack (35) fixedly connected to one side of the circular wheel (34).

4. The heater air duct switching device according to claim 3, characterized in that: The switching assembly (3) further comprises a central shaft (36) rotatably embedded in the junction of the ventilation duct (13) and the linear duct (12); a valve blade (4) is fixedly sleeved on the outer side of the central shaft (36); the top end of the central shaft (36) passes through the PTC heating frame (31) and is fixedly connected to a fan-shaped plate (37); an arc-shaped groove (38) is provided on the fan-shaped plate (37); arc-shaped inner racks (39) are provided on two opposite inner walls of the arc-shaped groove (38); the two arc-shaped inner racks (39) are engaged with the arc-shaped outer rack (35) in turn; the center of the arc-shaped groove (38) coincides with the central shaft (36).

5. The heater air duct switching device according to claim 3, characterized in that: A circular air inlet (15) is provided on the upper side of the heater body (1) corresponding to the wind wheel (2), a linear air outlet (16) is provided on the upper side of the heater body (1) corresponding to the PTC heating frame (31), and the PTC heating frame (31) has a built-in PTC heating module.

6. The heater air duct switching device according to claim 1, characterized in that: The centrifugal air duct (14) is configured to have a gradually narrowing width starting from the circular chamber (11).

Images