Bottom water accumulation prevention mechanism of roof air conditioner and control method of bottom water accumulation prevention mechanism

Abstract

The invention discloses a bottom water accumulation prevention mechanism of a roof air conditioner and a control method of the bottom water accumulation prevention mechanism, and belongs to the technical field of air conditioners. The air supply assembly is arranged in the air conditioner main body, and the air supply assembly comprises an air guide piece internally provided with an air duct and a centrifugal fan arranged in the air guide piece; and the air duct control assembly is connected to the air supply assembly, a bottom air outlet is formed in the bottom of the air duct, and the air duct control assembly is used for controlling opening or closing of the bottom air outlet. A bottom air outlet is additionally formed in an air duct assembly, opening or closing of the bottom air outlet is controlled through an air duct control assembly, air is introduced into the bottom of the air conditioner through an original air supply assembly of the car roof air conditioner, and the air conveyed by a centrifugal fan acts on the bottom of the air conditioner when necessary, so that accumulated water or sundries are purged, and a water outlet is prevented from being blocked; the air conditioner is prevented from being damaged by accumulated water and is simple in structure and low in cost.

Description

Technical Field

[0001] This invention relates to the field of roof-mounted air conditioning technology, and in particular to a bottom anti-water accumulation mechanism for a roof-mounted air conditioner and its control method. Background Technology

[0002] Most roof-mounted air conditioners are installed on the roof of the vehicle. The condensate produced by the roof-mounted air conditioner is discharged directly to the roof through the chassis drain holes, then flows down the roof into the drain channel and finally to the ground. Besides the roof-mounted air conditioner, the roof usually also houses exhaust fans, solar panels, and other items. Sometimes, it also accumulates foreign objects such as fallen leaves, plastic bags, and sand. These can affect the drainage of condensate and rainwater from the roof. Furthermore, if debris accumulates at the drain outlet at the bottom of the chassis, it may cause blockage, leading to water accumulation under the roof-mounted air conditioner.

[0003] Currently, anti-clogging technologies mainly include self-cleaning drain pipes and the addition of filter structures. For example, Chinese patent (CN222036147U) discloses a technology that uses airflow to clean the drain pipe, using an external air pump to expel impurities. While effective, this solution is costly. Another example is Chinese patent (CN221629989U), which discloses an anti-clogging filter box. This box filters impurities at the drain outlet, preventing blockages. While effective, it requires regular cleaning of the filter structure, making the process cumbersome. Based on these needs, there is an urgent need for a simple, low-cost anti-water accumulation mechanism for the bottom of air conditioners. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a bottom anti-water accumulation mechanism for a vehicle roof air conditioner and its control method, so as to solve the technical problems of complex structure and high cost of the bottom anti-water accumulation mechanism of the existing vehicle roof air conditioner.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, embodiments of the present invention provide a bottom anti-water accumulation mechanism for a vehicle roof air conditioner, comprising: An air conditioner body, the air conditioner body including a cooling and heating module; An air supply assembly, disposed within the main body of the air conditioner, comprising an air guide component with an internal air duct and a centrifugal fan disposed within the air guide component; and A duct control component is connected to the air supply component. The bottom of the duct is provided with a bottom air outlet. The duct control component is used to control the opening or closing of the bottom air outlet.

[0006] The air duct control component includes: a drive member and a sliding baffle controlled by the drive member. The drive member is connected to the air supply component. When the drive member drives the sliding baffle to approach the bottom air outlet, it blocks and closes the bottom air outlet. When the drive member drives the sliding baffle away from the bottom air outlet, it opens the bottom air outlet.

[0007] The driving component is a rotary driving module, the output shaft of which is provided with a transmission gear, and the sliding baffle is provided with a rack portion that meshes with the transmission gear.

[0008] The sliding baffle has at least one shielding plane, and the rack portion is arranged parallel to the shielding plane, so that the rotation drive module drives the sliding baffle to reciprocate in a direction flush with the bottom air outlet.

[0009] The air duct assembly is provided with a guide groove, and the sliding baffle is provided with a rolling unit, which is embedded in the guide groove.

[0010] The rolling unit is a ball bearing disposed on the edge of the sliding baffle.

[0011] The air conditioner body is equipped with a water level sensor at the bottom, and the air duct control component controls the opening or closing of the bottom air outlet based on the water level signal from the water level sensor.

[0012] The air conditioner body includes an outer cover and a chassis connected to the bottom of the outer cover. The chassis has a bottom through hole, and the bottom of the air guide has an air outlet channel communicating with the air duct. The air outlet channel extends to the bottom through hole.

[0013] The bottom air outlet is the connection point where the air duct and the air outlet channel meet.

[0014] Secondly, embodiments of the present invention also provide a control method, which is executed by the bottom anti-water accumulation mechanism of the roof air conditioner as described in any of the above claims, and includes the following steps: When the roof-mounted air conditioner is turned on, it enters the operating mode selected by the user. The first current water level is detected by a water level sensor according to a first preset interval time; If the current water level exceeds the preset value, the bottom air outlet will be opened by the air duct control component. According to the second preset interval, the water level sensor detects the second current water level again; If the second current water level is lower than the set value, the bottom air outlet will be closed by the air duct control component.

[0015] If the second current water level detected by the water level sensor exceeds the set value, the centrifugal fan is controlled to increase its speed.

[0016] When the centrifugal fan runs for a set time after increasing its speed, the centrifugal fan is controlled to stop and an alarm is triggered.

[0017] The present invention relates to a bottom anti-water accumulation mechanism and control method for a roof-mounted air conditioner. It adds a bottom air outlet to the air duct of the air duct assembly, and controls the opening and closing of the bottom air outlet through an air duct control component. Utilizing the existing air supply component of the roof-mounted air conditioner, gas is introduced to the bottom of the air conditioner through the bottom air outlet. When necessary, the gas delivered by a centrifugal fan acts on the bottom of the air conditioner, thereby blowing away accumulated water or debris, preventing blockage of the drain outlet, and avoiding damage to the air conditioner from accumulated water. This anti-water accumulation mechanism has a simple structure and low operating cost.

[0018] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are described in detail below. Attached Figure Description

[0019] Figure 1 This is an exploded view of the bottom anti-water accumulation mechanism of the roof-mounted air conditioner according to an embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the bottom anti-water accumulation mechanism of the roof air conditioner in an embodiment of the present invention, installed on the roof.

[0021] Figure 3 for Figure 2 The AA-direction sectional view shown.

[0022] Figure 4 for Figure 3 The diagram shows a magnified view of part B.

[0023] Figure 5 This is a schematic diagram of the bottom anti-water accumulation mechanism of the roof air conditioner in an embodiment of the present invention, installed on the roof.

[0024] Figure 6 for Figure 5 The cross-sectional view shown is along the CC direction.

[0025] Figure 7 for Figure 6 The diagram shows a magnified view of a portion of the D-structure.

[0026] Figure 8 This is a schematic diagram of the sliding baffle portion of the bottom anti-water accumulation mechanism of the roof air conditioner according to an embodiment of the present invention.

[0027] Figure 9 This is an overall cross-sectional view showing the bottom air outlet of the bottom anti-water accumulation mechanism of the roof air conditioner in an embodiment of the present invention in the closed state.

[0028] Figure 10 for Figure 9 The diagram shows a magnified view of a portion of the G structure.

[0029] Figure 11 This is an overall cross-sectional view showing the bottom air outlet of the bottom anti-water accumulation mechanism of the roof air conditioner in an embodiment of the present invention in the open state.

[0030] Figure 12 for Figure 11 The diagram shows a magnified view of a portion of structure I.

[0031] Figure 13 This is a schematic diagram of the gas flow direction from a lateral cross-sectional view of the bottom anti-water accumulation mechanism of the roof air conditioner according to an embodiment of the present invention.

[0032] Figure 14 This is a schematic diagram of the gas flow direction from a longitudinal cross-sectional view of the bottom anti-water accumulation mechanism of the roof air conditioner according to an embodiment of the present invention.

[0033] Figure 15 This is a flowchart of a water accumulation prevention control method according to an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures: The roof-mounted air conditioner includes: a bottom anti-water accumulation mechanism 100, an outer cover 1, a chassis 2, an upper air guide 3, a first upper air guide 31, a second upper air guide 32, an upper air duct 321, a first air outlet 311, a second air outlet 322, a centrifugal fan 4, a dual-shaft motor 41, a first centrifugal fan blade 42, a second centrifugal fan blade 43, a lower air guide 5, a first lower air guide 51, a second lower air guide 52, a lower air duct 521, and a bottom air outlet 5. 11. Air outlet duct 512. Guide groove 513. Sliding baffle 6. Shielding plane 61. Mounting position 611. Shielding surface 62. Rack part 63. Left connecting part 64. Right connecting part 65. Drive assembly 7. Drive component 71. Transmission gear 72. Water level sensor 8. Condenser 9. Rolling unit 10. First air inlet 11. Second air inlet 12. Air outlet 13. Mounting cavity 21. Roof 20. Water accumulation area 30. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] Most roof-mounted air conditioners are installed on the roof of the vehicle. The condensate produced by the roof-mounted air conditioner is discharged directly to the roof through the chassis drain holes, then flows down the roof into the drain channel and finally to the ground. Besides the roof-mounted air conditioner, the roof usually also houses exhaust fans, solar panels, and other items. Sometimes, it also accumulates foreign objects such as fallen leaves, plastic bags, and sand. These can affect the drainage of condensate and rainwater from the roof. Furthermore, if debris accumulates at the drain outlet at the bottom of the chassis, it may cause blockage, leading to water accumulation under the roof-mounted air conditioner.

[0043] Currently, anti-clogging technologies mainly include self-cleaning drain pipes and the addition of filter structures. For example, Chinese patent (CN222036147U) discloses a technology that uses airflow to clean the drain pipe, using an external air pump to expel impurities. While effective, this solution is costly. Another example is Chinese patent (CN221629989U), which discloses an anti-clogging filter box. This box filters impurities at the drain outlet, preventing blockages. While effective, it requires regular cleaning of the filter structure, making the process cumbersome. Based on these needs, there is an urgent need for a simple, low-cost anti-water accumulation mechanism for the bottom of air conditioners.

[0044] Please see Figures 1 to 14 In this embodiment, the bottom anti-water accumulation mechanism 100 of the roof air conditioner includes: An air conditioner body, the air conditioner body including a cooling and / or heating module; the air conditioner body includes an air conditioner housing and a cooling and heating module connected to the air conditioner housing, or only a single-function cooling module or heating module is provided.

[0045] An air supply assembly, disposed within the main body of the air conditioner, includes an air guide component with an internal air duct and a centrifugal fan 4 disposed within the air guide component. This air supply assembly is used to draw outside air into the air conditioner and blow it to the external environment, achieving airflow circulation and heat dissipation. A duct control component is connected to the air supply component. The bottom of the duct is provided with a bottom air outlet 511. The duct control component is used to control the opening or closing of the bottom air outlet 511. When the bottom air outlet 511 is open, the gas delivered by the air supply component can be output from the bottom air outlet 511 and act on the bottom space of the air conditioner body to remove accumulated water and debris.

[0046] In this embodiment, only an air duct control component is added to the existing air conditioner body. This component controls the airflow inside the air supply component to be delivered from the bottom air outlet 511 to the bottom of the air conditioner. The airflow from the air supply component is used to blow away accumulated water or debris at the bottom of the air conditioner, thereby preventing water and debris from clogging the drain outlet. Compared to existing anti-water accumulation technologies, this method only adds an air duct control component, resulting in lower costs. Furthermore, the air duct control component has a simple structure. Compared to existing filter structures, the solution in this embodiment has a simpler structure, requires no regular cleaning, and offers better anti-water accumulation and anti-clogging effects.

[0047] like Figure 1 As shown, the air guide includes an upper air guide 3 and a lower air guide 5 connected to the upper air guide 3. The upper air guide 3 is provided with an upper air duct 321, and the lower air guide 5 is provided with a lower air duct 521. The upper air duct 321 and the lower air duct 521 together form a through annular air duct. Furthermore, the upper air guide 3 and the lower air guide 5 are also provided with mounting cavities for installing a centrifugal fan 4.

[0048] like Figure 2 As shown, when the centrifugal fan 4 is started, external gas enters the air duct from the air inlet end of the air guide and is sent out from the air outlet end of the air guide through the air duct, thereby dissipating heat from the condenser 9 located on the left side of the air guide.

[0049] In this embodiment, the upper air guide 3 is provided in two sets, namely a first upper air guide 31 and a second upper air guide 32. The first upper air guide 31 and the second upper air guide 32 are arranged side by side and have the same structure. Correspondingly, the lower air guide 5 is also provided in two sets, namely a first lower air guide 51 and a second lower air guide 52. The first upper air guide 31 and the first lower air guide 51 are connected vertically, and the second upper air guide 32 and the second lower air guide 52 are also connected vertically, forming two independent air supply units.

[0050] The centrifugal fan 4 includes a dual-shaft motor 41, and a first centrifugal fan blade 42 and a second centrifugal fan blade 43 connected to two front-to-back output shafts of the dual-shaft motor 41. The dual-shaft motor 41 is located between the first upper air guide 31 and the second upper air guide 32. The first centrifugal fan blade 42 and the second centrifugal fan blade 43 are respectively installed in the mounting cavity enclosed by the first upper air guide 31 and the first lower air guide 51. The second centrifugal fan blade 43 is disposed in the mounting cavity enclosed by the second upper air guide 32 and the second lower air guide 52. The first upper air guide 31, the first centrifugal fan blade 42, and the first lower air guide 51 together form one air supply mechanism, and the second upper air guide 32, the second centrifugal fan blade 43, and the second lower air guide 52 together form another air supply mechanism.

[0051] It is understood that in other embodiments, the number of air supply mechanism groups can be increased or decreased according to actual needs, and is not limited to the two groups in this embodiment.

[0052] The air conditioner body includes an outer cover 1 and a chassis 2 connected to the bottom of the outer cover 1. The outer cover 1 and the chassis 2 together form the outer shell of the air conditioner, which has an internal cavity in which the cooling and heating module, the air supply assembly, and the air duct control assembly are all housed. The cooling and heating module is a publicly available cooling and heating system unit, which will not be described in detail here.

[0053] Please refer to it again. Figure 1 The air duct control component includes: a drive member 71 and a sliding baffle 6 controlled by the drive member 71. The drive member 71 is connected to the air supply component. When the drive member 71 drives the sliding baffle 6 to approach the bottom air outlet 511, it blocks the bottom air outlet 511 and closes it. When the drive member 71 drives the sliding baffle 6 away from the bottom air outlet 511, it opens the bottom air outlet 511.

[0054] In this embodiment, the driving component 71 is a rotary driving module, specifically a servo motor. The output shaft of the rotary driving module is equipped with a transmission gear 72. The driving component 71 and the transmission gear 72 form a driving assembly 7. The sliding baffle 6 is equipped with a rack portion 63 that meshes with the transmission gear 72. When the output shaft of the driving component 71 rotates, it drives the transmission gear 72 to rotate. The rotating transmission gear 72 drives the rack portion 63 that meshes with it to move in a linear reciprocating motion, which in turn drives the sliding baffle 6 to move reciprocally as a whole. Finally, the sliding baffle 6 controls the opening or closing of the bottom air outlet 511 of the air supply assembly.

[0055] Please refer to it again. Figure 8The sliding baffle 6 has at least one shielding plane 61, and the rack portion 63 is arranged parallel to the shielding plane 61, so that the driving member 71 drives the sliding baffle 6 to reciprocate in a direction flush with the bottom air outlet 511. That is, in this embodiment, the opening or closing of the vent is achieved by the sliding baffle 6 and the bottom air outlet 511 sliding laterally. Since the roof air conditioner is fixedly connected to the roof of the car, the space at the bottom of the roof air conditioner is limited. Therefore, using the sliding baffle 6 and the bottom air outlet 511 to move laterally to achieve opening and closing can effectively solve the space problem.

[0056] In other embodiments, the driving member 71 can also drive the sliding baffle 6 to move closer to or further away from the bottom air outlet 511 in the direction directly in front of it. When the sliding baffle 6 abuts against the edge of the bottom air outlet 511, the two abut against each other in a sealed manner, thereby completely closing the bottom air outlet 511. When the sliding baffle 6 moves away from the bottom air outlet 511, the bottom air outlet 511 enters the open state.

[0057] In another embodiment, the drive member 71 and the sliding baffle 6 can also be driven by rotation. The rotation output shaft of the drive member 71 drives the sliding baffle 6 to rotate. At this time, the sliding baffle 6 swings relative to the bottom air outlet 511, thereby realizing the closing or opening of the bottom air outlet 511.

[0058] In another embodiment, the drive member 71 and the sliding baffle can also be moved by a magnetic force structure of a magnet and an iron sheet, such as an electromagnet and a magnetic sheet.

[0059] Please continue reading 1 and... Figure 8 The sliding baffle 6 includes: a rack portion 63, a left connecting portion 64 and a right connecting portion 65 extending from opposite sides of the rack portion 63, a first blocking portion extending from the edge of the left connecting portion 64, and a second blocking portion extending from the edge of the right connecting portion 65. The first blocking portion has a blocking plane 61, and the second blocking portion has a blocking surface 62. In this embodiment, the air supply assembly has two air supply mechanisms; therefore, the first blocking portion and the second blocking portion of the sliding baffle 6 correspond to the bottom air outlets of the first lower air guide 51 and the second lower air guide 52, respectively. To achieve smooth movement of the sliding baffle 6 driven by the drive member 71, the left connecting portion 64, the first blocking portion, the right connecting portion 65, and the second blocking portion are symmetrically arranged with respect to the rack portion 63. The first shielding surface is used to control the opening or closing of the bottom air outlet 511 provided on the first lower air guide 51, and the second shielding surface is used to control the opening or closing of the bottom air outlet provided on the second lower air guide 52.

[0060] Please refer to it again. Figure 12The relationship between the stroke L1 of the sliding baffle 6 and the center distance L2 between the first and last tooth grooves of the rack 63 is: L1=L2, so as to ensure that the stroke of the sliding baffle 6 meets the requirements of fully opening or fully closing the bottom air outlet 511.

[0061] Please refer to it again. Figure 7 The air duct assembly is provided with a guide groove 513, and the sliding baffle 6 is provided with a rolling unit 10, which is embedded in the guide groove 513. Specifically, the guide groove 513 is formed on the first lower air guide member 51 and is located at the bottom air outlet 511. The edge of the shielding plane 61 of the sliding baffle 6 is inserted into the guide groove 513. In order to reduce the friction or collision between the sliding baffle 6 and the guide groove 513, the sliding baffle 6 is also provided with a rolling unit 10, which is rolled to the bottom of the guide groove 513 to reduce friction. Similarly, the sliding structure of the second shielding part and the second lower air guide member 52 is also provided with a rolling unit to reduce friction.

[0062] The rolling unit 10 is a ball bearing disposed on the edge of the sliding baffle 6. Specifically, the first and second blocking portions of the sliding baffle 6 each have a straight edge disposed opposite to each other, and the bottom of the straight edge is provided with a mounting position 611, where the ball bearing is disposed. The relationship between the height h1 of the mounting position 611, the diameter d1 of the ball bearing, and the height h2 of the guide groove 513 is: h1 < d1 < h2, so that the ball bearing can roll within the guide groove 513, while the sliding baffle 6 does not rub against the bottom of the guide groove 513 when it slides.

[0063] Please refer to it again. Figure 1 and Figure 14 The air conditioner body is also equipped with a water level sensor 8 at its bottom. The air duct control component controls the opening or closing of the bottom air outlet 511 based on the water level signal from the water level sensor 8. Specifically, the water level sensor 8 is installed on the chassis 2 and is used to detect the water level in the water accumulation area 30 located below the chassis 2. When the water level sensor 8 detects that the water level in the water accumulation area 30 exceeds a set value, the air duct control component controls the bottom air outlet 511 to open. Part of the gas delivered by the centrifugal fan 4 flows out from the bottom air outlet 511 and acts directly on the water accumulation area 30 below, blowing away the accumulated water and debris to prevent blockage by water or debris.

[0064] like Figure 1As shown, the air conditioner body includes an outer cover 1 and a chassis 2 connected to the bottom of the outer cover 1. The chassis 2 has a mounting cavity 21, and the bottom of the mounting cavity 21 is provided with a bottom through hole. The bottom of the air guide is provided with an air outlet channel communicating with the air duct, and the air outlet channel extends to the bottom through hole. Specifically, taking the first lower air guide 51 as an example, an air outlet channel 512 extends downward from the edge of the bottom air outlet 511, and the air outlet channel 512 extends to the bottom through hole located on the chassis 2. The air duct control component is used to control the opening or closing of the bottom air outlet 511. The gas output from the bottom air outlet 511 continues to flow along the air outlet channel 512 to the water accumulation area 30. The air outlet channel 512 is used to guide the gas to flow to the water accumulation area 30. At the same time, a certain space is reserved between the bottom of the first lower air guide 51 and the chassis 2. This space is used to install the air duct control component.

[0065] The bottom air outlet 511 is the connection point where the air duct and the air outlet channel 512 meet.

[0066] Please refer to it again. Figures 1 to 14 The bottom anti-water accumulation mechanism 100 of the roof air conditioner is installed on the roof 20, forming a water accumulation area 30 between itself and the roof 20. The working process of the bottom anti-water accumulation mechanism 100 of the roof air conditioner is described in detail below: in, Figure 9 and Figure 10 When the sliding baffle 6 is in contact with the bottom air outlet 511, the bottom air outlet 511 is closed. During this process, the bottom anti-water accumulation mechanism 100 of the roof air conditioner is in a non-water discharge working mode. Figure 11 and Figure 12 When the sliding baffle 6 is separated from the bottom air outlet 511, the bottom air outlet 511 is opened, and the bottom anti-water accumulation mechanism 100 of the roof air conditioner enters the water discharge working mode.

[0067] The outer casing 1 has a first air inlet 11 and a second air inlet 12 on its side along the width of the condenser 9, and an air outlet 13 on the outer casing 1 behind the air guide. External air enters the outer casing 1 through the first air inlet 11 and the second air inlet 12, flows through the condenser 9, enters the air supply assembly, and is finally discharged to the external environment through the air outlet 13. During this process, the centrifugal fan 4 provides the airflow power. A first air outlet 311 is located on the side of the first upper air guide 31 or the first lower air guide 51 near the air outlet 13; similarly, a second air outlet 322 is located on the side of the second upper air guide 32 or the second lower air guide 52 near the air outlet 13.

[0068] The sliding baffle 6 has two resting positions: an initial position and a final position. When the sliding baffle 6 is in the initial position, the bottom air outlets 511 on the first lower air guide 51 and the second lower air guide 52 are closed. When the drive unit 71 is energized and starts rotating clockwise, it drives the transmission gear 72 to rotate clockwise, and the rack portion 63 meshing with the transmission gear 72 moves forward (…). Figure 9 As shown on the left, the bottom air outlet 511 gradually opens until the sliding baffle 6 reaches its final position, at which point the bottom air outlet 511 is fully open. When the stepper motor of the drive unit 71 reverses, it drives the transmission gear 72 to rotate counterclockwise, and the rack part 63 meshing with the transmission gear 72 moves backward (as shown on the left). Figure 9 (As shown on the right) Slide the bottom air outlet 511 opening gradually until the sliding baffle 6 moves to the initial position and the bottom air outlet 511 opening closes.

[0069] When the drive unit 71 drives the centrifugal fan 4 to rotate, the airflow first enters from the first air inlet 11 and the second air inlet 12 on both sides, flows through the condenser 9, and then enters the air ducts of the two centrifugal fans 4 respectively. The rear of each centrifugal fan's air duct is provided with a first air outlet 311 and a second air outlet 322, and the bottom is provided with a bottom air outlet 511. When the bottom air outlet 511 is closed, all the airflow is discharged from the first air outlet 311 and the second air outlet 322. When the bottom air outlet 511 is open, part of the airflow flows out from the first air outlet 311 and the second air outlet 322, and part flows out from the bottom air outlet 511. The airflow from the bottom air outlet 511, guided by the air outlet channel 512, flows towards the water accumulation area 30 formed between the chassis 2 and the roof 20, blowing away debris at the bottom of the chassis 2's drain outlet, and also pushing the water flow to prevent water accumulation.

[0070] This invention also provides a control method, which is executed by the bottom anti-water accumulation mechanism of the roof air conditioner as described in any of the above embodiments, and includes the following steps: When the roof-mounted air conditioner is turned on, it enters the operating mode selected by the user. The first current water level is detected by a water level sensor according to a first preset interval time; If the current water level exceeds the preset value, the bottom air outlet will be opened by the air duct control component. According to the second preset interval, the water level sensor detects the second current water level again; If the second current water level is lower than the set value, the bottom air outlet will be closed by the air duct control component.

[0071] If the second current water level detected by the water level sensor exceeds the set value, the centrifugal fan is controlled to increase its speed.

[0072] When the centrifugal fan runs for a set time after increasing its speed, the centrifugal fan is controlled to stop and an alarm is triggered. During this stage, the fan must be stopped actively regardless of whether the water level detected by the water level sensor has dropped below the safe water level.

[0073] For details, please refer to Figure 15 When the user turns on the roof air conditioner and selects the operating mode, the roof air conditioner starts running and automatically detects the water level every ∆t time interval. When the detected water level h≥h0 (preset dangerous water level value), the stepper motor rotates forward, controlling the sliding baffle mechanism to move and opening the bottom air outlet 511 at the bottom of the air duct. Otherwise, every t1 time interval, the stepper motor is powered on for t2 time interval (t1 is preferably 1-2 hours, and t2 is the time consumed by the sliding baffle mechanism opening once plus an interval of 10-20 minutes plus the time consumed by the sliding baffle mechanism closing once).

[0074] After the air outlet 511 at the bottom of the unit is opened, the water level is automatically detected at intervals of ∆t. If the water level h≥h0 is still detected, it indicates that the airflow is not strong enough and the unblocking effect is not obvious. At this time, the speed of the centrifugal fan is increased by ∆r (∆r is preferably 50-100r / min) to increase the air volume. Otherwise, it indicates that the unblocking effect is obvious and there is no need to increase the speed.

[0075] It also has a protection function for extreme situations. After each speed increase, it will determine whether the motor speed has reached the upper limit r0. If the upper limit is reached in extreme situations, the motor temperature will be too high, and long-term operation will cause safety problems. Therefore, the machine will stop running and report the water full protection to remind the user.

[0076] The bottom anti-water accumulation mechanism and control method of the roof air conditioner in this embodiment adds a bottom air outlet to the air duct of the air duct assembly. The opening or closing of the bottom air outlet is controlled by the air duct control assembly. Using the original air supply assembly of the roof air conditioner, air is introduced into the bottom of the air conditioner through the bottom air outlet. When necessary, the air delivered by the centrifugal fan acts on the bottom of the air conditioner to blow away accumulated water or debris, prevent the drain outlet from being blocked, and avoid water damage to the air conditioner. This anti-water accumulation mechanism has a simple structure and low operating cost.

[0077] The above examples are merely illustrative of the technical content of the present invention to facilitate reader understanding, but do not imply that the implementation of the present invention is limited thereto. Any technical extensions or re-creations made based on the present invention are protected by the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A bottom anti-water accumulation mechanism for a vehicle roof air conditioner, characterized in that, include: An air conditioner body, the air conditioner body including a cooling and / or heating module; An air supply assembly is disposed within the main body of the air conditioner. The air supply assembly includes an air guide with an internal air duct and a centrifugal fan disposed within the air guide. as well as A duct control component is connected to the air supply component. The bottom of the duct is provided with a bottom air outlet. The duct control component is used to control the opening or closing of the bottom air outlet.

2. The bottom anti-water accumulation mechanism of the roof-mounted air conditioner according to claim 1, characterized in that, The air duct control component includes: a drive member and a sliding baffle controlled by the drive member. When the drive member drives the sliding baffle to approach the bottom air outlet, the bottom air outlet is blocked and closed. When the drive member drives the sliding baffle away from the bottom air outlet, the bottom air outlet is opened.

3. The bottom anti-water accumulation mechanism of the roof-mounted air conditioner according to claim 2, characterized in that, The driving component is a rotary driving module, the output shaft of which is provided with a transmission gear, and the sliding baffle is provided with a rack portion that meshes with the transmission gear.

4. The bottom anti-water accumulation mechanism of the roof air conditioner according to claim 3, characterized in that, The sliding baffle has at least one shielding plane, and the rack portion is arranged parallel to the shielding plane, such that the rotation drive module drives the sliding baffle to reciprocate in a direction flush with the bottom air outlet.

5. The bottom anti-water accumulation mechanism of the roof-mounted air conditioner according to any one of claims 1 to 4, characterized in that, The air duct assembly is provided with a guide groove, and the sliding baffle is provided with a rolling unit, which is embedded in the guide groove.

6. The bottom anti-water accumulation mechanism of the roof-mounted air conditioner according to claim 5, characterized in that, The rolling unit is a ball bearing disposed on the edge of the sliding baffle.

7. The bottom anti-water accumulation mechanism of the roof-mounted air conditioner according to claim 5, characterized in that, The bottom of the air conditioner body is also equipped with a water level sensor, and the air duct control component controls the opening or closing of the bottom air outlet according to the water level signal of the water level sensor.

8. The bottom anti-water accumulation mechanism of the roof air conditioner according to claim 7, characterized in that, The air conditioner body includes an outer cover and a chassis connected to the bottom of the outer cover. The chassis has a bottom through hole, and the bottom of the air guide has an air outlet channel communicating with the air duct. The air outlet channel extends to the bottom through hole.

9. The bottom anti-water accumulation mechanism of the roof air conditioner according to claim 8, characterized in that, The bottom air outlet is the connection point where the air duct and the air outlet channel meet.

10. A control method, characterized in that, The control method is executed by the bottom anti-water accumulation mechanism of the roof air conditioner as described in any one of claims 1 to 9, characterized in that it includes the following steps: When the roof-mounted air conditioner is turned on, it enters the operating mode selected by the user. The first current water level is detected by a water level sensor according to a first preset interval time; If the current water level exceeds the preset value, the bottom air outlet will be opened by the air duct control component. According to the second preset interval, the water level sensor detects the second current water level again; If the second current water level is lower than the set value, the bottom air outlet will be closed by the air duct control component.

11. The control method according to claim 10, characterized in that, If the second current water level detected by the water level sensor exceeds the set value, the centrifugal fan is controlled to increase its speed.

12. The control method according to claim 11, characterized in that, When the centrifugal fan runs for a set time after increasing its speed, the centrifugal fan will be stopped and an alarm will be triggered.

Images