A bottom plate structure for discharging water after defrosting of an evaporator

Abstract

The application relates to the technical field of evaporator drainage chassis, in particular to a chassis structure for drainage after defrosting of an evaporator. The following technical scheme is proposed: an installation bottom foot is provided with a funnel-shaped water guide chassis at the upper end, which concentrates and guides water; a drainage structure is arranged in the recessed middle part of the water guide chassis; a plurality of evaporator supporting pieces are arranged at the upper end edge of the water guide chassis and used for assisting drainage. In the application, the water guide chassis has a small water accumulation dead angle, a high drainage speed and a conventional flat plate type chassis, a freeze-proof design is arranged on the drainage path, and the defrosting water is prevented from freezing. In the application, the height difference between the evaporator mounting surface and the lowest point drainage port is large, the installation adaptability is high, and the drainage effect is good. The whole drainage chassis has only one drainage port, which has a good flow convergence effect on the accumulated water.

Description

Technical Field

[0001] This application relates to the field of evaporator drainage chassis technology, and more particularly to a chassis structure for draining water after evaporator defrosting. Background Technology

[0002] The core working principle of an air source heat pump is to achieve heat exchange through a finned heat exchanger: In heating mode, the heat exchanger acts as an evaporator, where the internal low-temperature refrigerant exchanges heat with the outside air, absorbing heat from the air. At this time, water vapor in the air condenses on the finned surface due to the cooling effect; when the ambient temperature is below 0℃, the condensate further freezes into frost, forming a frosting phenomenon (especially severe in high-humidity, low-temperature environments). After the equipment has been running for a period of time, a defrosting mode (such as electric heating defrosting or reverse circulation defrosting) needs to be activated. The melted frost will turn into a large amount of defrost water, which will collect in the chassis. Therefore, the chassis must have a drainage function to prevent water from stagnating inside the equipment for a long time. If water accumulates in the chassis of the finned heat exchanger and cannot be drained in time, it will directly affect the safety, energy efficiency, and service life of the equipment. The traditional conventional chassis defrosting structure is shown in the attached instruction manual. Figure 1 As shown, the evaporator rests on a flat base with a drain hole. After defrosting, the defrosting water is discharged through the drain hole.

[0003] Conventional flat-plate chassis drainage structures for air source heat pumps are limited by their flat shape, resulting in defects in drainage function. These defects directly affect the stability, energy efficiency, and service life of the equipment. They suffer from numerous water accumulation dead spots, incomplete drainage due to the flat structure, insufficient drainage speed leading to overflow in high humidity environments, poor installation adaptability, and stringent requirements for tilt angles.

[0004] Therefore, this application proposes a chassis structure for draining water after the evaporator defrosts. Summary of the Invention

[0005] The purpose of this application is to address the technical problems pointed out in the background art by proposing a chassis structure for draining water after evaporator defrosting.

[0006] The technical solution of this application is: a chassis structure for draining water after defrosting an evaporator, including mounting feet, and a funnel-shaped water guiding chassis installed at the upper end of the mounting feet for centralized water guiding; The recessed center of the water guide chassis is provided with a drainage structure, and several evaporator support components are installed at the upper edge of the water guide chassis to assist in drainage.

[0007] Preferably, the water guide chassis includes a rectangular frame, the middle of which is composed of four downwardly inclined panels, and a flat plate is provided below the convergence point, with a groove inside the flat plate.

[0008] Preferably, the drainage structure includes a drain outlet formed in the groove and a drain pipe fixedly connected to the outlet end; The outer wall of the drain pipe is fitted with an antifreeze sleeve.

[0009] Preferably, the evaporator support includes an arched support plate connected to a water guide chassis. The upper end of the arched support plate has several square holes, and the lower end face of the arched support plate is fixedly connected to an inclined water guide plate. The arched support plate has a water guide opening on its side, which is located at the bottom end of the water guide plate, so that water can be smoothly discharged into the water guide base.

[0010] Preferably, the mounting base is composed of four sheet metal strips spliced ​​together, and the sheet metal strips are provided with mounting holes. The water guide base is also provided with mounting holes, and the corresponding mounting holes are fixed to each other by bolts.

[0011] Preferably, the evaporator support is configured in three sets, and the evaporator support is fixedly connected to the edge of the water guide chassis by bolts.

[0012] Compared with the prior art, this application has the following beneficial technical effects: In this application, defrosting water enters the upper part of the arched support plate through the square hole. The water guide plate is set at an angle, and the defrosting water flows along the inclined surface of the water guide plate, then flows out through the water guide port to the water guide base, and finally flows through the inclined part to the downward drain in the middle to be discharged, effectively avoiding the local accumulation of water.

[0013] In low-temperature environments, defrost water is prone to freezing when it comes into contact with sheet metal. This new invention can ensure that the temperature of the entire chassis does not drop below 0°C during defrosting by placing a heating belt in the middle of the evaporator support and installing a sheet-like heating belt at the bottom of the water guide plate, thus allowing the defrost water to drain smoothly.

[0014] In summary, the water-guiding chassis in this application features a structural design with fewer dead spots for water accumulation and faster drainage compared to conventional flat chassis. Furthermore, an anti-freeze design is incorporated into the drainage path to prevent defrost water from freezing. The evaporator mounting surface and the lowest drain outlet have a significant height difference of approximately 6-7 cm, resulting in strong installation adaptability. Even on uneven mounting surfaces, it maintains excellent drainage performance. The entire drainage chassis has only one drain outlet, effectively collecting accumulated water. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the chassis structure for draining water after defrosting an evaporator. Figure 2 This is a schematic diagram of a chassis structure for draining water after evaporator defrosting; Figure 3This is a front view of the water-guiding chassis in this application; Figure 4 This is a schematic diagram of the structure of the evaporator support component in this application; Figure 5 This is a schematic diagram of the structure for installing the mounting feet in this application.

[0016] Reference numerals: 1. Water guide base; 2. Evaporator support; 21. Arched support plate; 22. Square hole; 23. Water guide plate; 24. Water inlet; 3. Install base; 4. Drain outlet; 5. Drain pipe. Detailed Implementation

[0017] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0019] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0020] Example like Figures 1-5 As shown, this application proposes a chassis structure for draining water after evaporator defrosting, including mounting feet 3. A funnel-shaped water-guiding chassis 1 is mounted on the upper end of the mounting feet 3 to concentrate water flow. Traditional flat chassis are typically made of relatively flat metal plates, and their core defect stems from "weak planar flow guiding ability." Water flow on a flat surface is prone to local stagnation due to surface tension and obstruction by the evaporator fin support structure, especially at the contact area between the evaporator and the chassis, easily forming microscopic water accumulation dead zones. Furthermore, if the chassis processing precision is insufficient, such as slight local dents or minor tilting deviations during installation, water will stagnate in low-lying areas for a long time, unable to flow to the drain outlet. Long-term stagnation can also lead to corrosion of the chassis metal, affecting the unit's service life. The water-guiding chassis 1 described in this application includes a rectangular frame, the middle of which consists of four downward-sloping panels. A flat plate is provided below the converging points, with grooves inside the flat plate. The discharged water will concentrate at the bottom flat plate.

[0021] Furthermore, a drainage structure is provided in the recessed center of the water-guiding base 1, and several evaporator support members 2 are installed at the upper edge of the water-guiding base 1 to assist drainage. The drainage structure includes a drain outlet 4 opened in the groove and a drain pipe 5 fixedly connected to the output end of the drain outlet 4; the outer wall of the drain pipe 5 is fitted with an antifreeze sleeve. The antifreeze sleeve is a sponge antifreeze sleeve, which can effectively prevent the water in the drain pipe 5 from freezing in a low-temperature environment and clogging the pipe.

[0022] Specifically, the evaporator support 2 includes an arched support plate 21, which is fixedly connected to the water guide chassis 1 (by bolts). The upper end of the arched support plate 21 has several square holes 22, and the lower end face of the arched support plate 21 is fixedly connected to an inclined water guide plate 23.

[0023] The arched support plate 21 has a water guide port 24 on its side, located at the bottom end of the water guide plate 23, allowing water to drain smoothly into the water guide chassis 1. Traditional flat chassis drainage relies mainly on a simple "planar inclination + drain port" model, lacking a structure design for graded flow guidance or accelerated drainage, which is particularly problematic in high-humidity environments. In scenarios with high condensate flow, such as the rainy season in southern China or humid coastal areas, condensate continuously drips from the fin surface to the chassis. The planar flow rate is far lower than the water production rate, easily leading to a gradual increase in water accumulation on the chassis, even overflowing from the edges, contaminating the equipment installation environment such as balconies and roofs, or soaking surrounding components such as electrical junction boxes. In low-temperature environments in northern regions, when defrosting mode is activated, a large amount of defrost water accumulates on the chassis in a short time. The planar structure cannot quickly guide the water to the drain port, and some water may refreeze on the chassis due to insufficient drainage time, exacerbating the risk of evaporator freezing expansion. Simultaneously, the accumulated ice layer will pile up on the chassis. The chassis has limited load-bearing capacity; if structural deformation occurs, even if the ice layer melts later, drainage will still be impossible. In this application, the discharged water falls through several square holes 22 into the upper part of the water guide plate 23. Because the water guide plate 23 is inclined, the water on the water guide plate 23 will be quickly discharged into the water guide chassis 1 through the water guide port 24. And it will be discharged away through the drain pipe 5, without polluting the nearby environment.

[0024] The mounting base 3 described in this application is composed of four sheet metal strips spliced ​​together. The sheet metal strips have mounting holes, and the water guide base 1 also has mounting holes. The corresponding mounting holes are fixed to each other by bolts.

[0025] The evaporator support 2 is configured in three sets, and the evaporator support 2 is fixedly connected to the edge of the water guide plate 1 by bolts. In this application, a heating belt can be installed on the evaporator support 2, and a sheet-like heating belt can be installed at the bottom of the water guide plate 23 to prevent freezing in low-temperature environments and to maintain smooth drainage of the evaporator support 2.

[0026] The working principle of this embodiment is as follows: The evaporator is placed on the evaporator support 2. When the main unit starts the defrosting mode, the defrosting water on the evaporator flows down along the fins to the evaporator support 2. There are uniform square holes 22 on the arched support plate 21. The defrosting water will enter the upper end of the arched support plate 21 through the square holes 22. The water guide plate 23 is set at an inclination. The defrosting water will flow along the inclined surface of the water guide plate 23 and then flow out through the water guide port 24 to the water guide base 1. Finally, it will all flow through the inclined part to the downward drain port 4 in the middle and be discharged.

[0027] In low-temperature environments, defrost water is prone to freezing when it comes into contact with sheet metal. A heating belt can be installed on the evaporator support 2 and a sheet heating belt can be installed at the bottom of the water guide plate 23 to ensure smooth drainage of the evaporator support 2 and ensure that the temperature of the entire chassis does not drop below 0°C during defrosting, allowing the defrost water to drain smoothly.

[0028] The water-guiding chassis 1 in this application features a structural design with fewer dead spots for water accumulation and faster drainage speed compared to conventional flat chassis. It also incorporates an anti-freeze design along the drainage path to prevent defrost water from freezing. The evaporator mounting surface and the lowest drain outlet have a significant height difference of approximately 6-7 cm, offering strong installation adaptability. Even on uneven mounting surfaces, it maintains good drainage performance. The entire drainage chassis has only one drain outlet, effectively collecting accumulated water. Different directional designs are possible at drain outlet 4 (by setting drain pipe 5 as a bend, allowing adjustment of the drainage direction), guiding water flow into a pre-reserved external water tank to prevent contamination of the equipment's installation platform.

[0029] The above specific embodiments are merely preferred embodiments of this application. Based on the technical solutions of this application and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments. The above specific embodiments are merely explanations of this application and are not limitations on this application.

Claims

1. A chassis structure for draining water after defrosting an evaporator, comprising mounting feet (3), characterized in that, The upper end of the mounting foot (3) is equipped with a funnel-shaped water guiding base (1) for centralized water guiding; The water guide base (1) has a drainage structure in the recessed center, and several evaporator support components (2) are installed at the upper edge of the water guide base (1) to assist in drainage.

2. The chassis structure for draining water after defrosting an evaporator according to claim 1, characterized in that, The water guide chassis (1) includes a rectangular frame, the middle of which is composed of four downward-sloping panels, and a flat plate is provided below the convergence of the four panels, with a groove inside the flat plate.

3. The chassis structure for draining water after defrosting an evaporator according to claim 2, characterized in that, The drainage structure includes a drain outlet (4) opened in the groove and a drain pipe (5) fixedly connected to the output end of the drain outlet (4). The outer wall of the drain pipe (5) is fitted with an antifreeze sleeve.

4. The chassis structure for draining water after defrosting an evaporator according to claim 1, characterized in that, The evaporator support (2) includes an arched support plate (21), which is connected to the water guide chassis (1). The upper end of the arched support plate (21) has several square holes (22), and the lower end of the arched support plate (21) is fixedly connected to an inclined water guide plate (23). The arched support plate (21) has a water guide port (24) on its side. The water guide port (24) is located at the bottom end of the water guide plate (23) so that water can be smoothly discharged into the water guide chassis (1).

5. The chassis structure for draining water after defrosting an evaporator according to claim 1, characterized in that, The mounting base (3) is composed of four sheet metal strips spliced ​​together. The sheet metal strips have mounting holes. The water guide base (1) also has mounting holes. The corresponding mounting holes are fixed to each other by bolts.

6. The chassis structure for draining water after defrosting an evaporator according to claim 1, characterized in that, The evaporator support (2) is configured in three sets, and the evaporator support (2) is fixedly connected to the edge of the water guide chassis (1) by bolts.

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