Overhead type refrigerator unit

Abstract

A top-mounted refrigerator unit comprises a case, a heat exchanger, a heat exchanger, a heat exchanger, a heat exchanger, a heat exchanger and a heat exchanger, wherein a fan and a condenser are arranged in the case; a front air inlet is formed in the front portion of the machine box, an air outlet is formed in the rear portion of the machine box, a fan installation wall is arranged in the machine box, the fan installation wall is located behind the condenser, and the fan installation wall and the condenser are arranged in a spaced mode. The interior of the case is divided by the condenser and the fan mounting wall, an air return cavity area, a negative pressure cavity area and an air supply cavity area are sequentially formed from front to back, the air return cavity area is located behind the front air inlet, the negative pressure cavity area is located between the condenser and the fan mounting wall, and the air supply cavity area is located in the case. The air supply cavity area is located in front of the air outlet, and the fan is arranged on the fan mounting wall and located in the air supply cavity area. The case adopts a three-cavity layout that the air return cavity, the negative pressure cavity and the air supply cavity are respectively arranged in the front, the middle and the rear, so that the efficiency of the fan can be improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of temperature control equipment for energy storage systems, and specifically relates to a top-mounted chiller unit. Background Technology

[0002] Energy storage battery systems are a crucial component of modern power systems and smart grids. These systems typically feature large battery capacities and high power outputs, resulting in significant heat generation and demanding high-performance cooling. Poor heat dissipation can negatively impact the system's performance and reliability, necessitating effective cooling methods. Top-mounted chillers, positioned atop the energy storage cabinet, allow for independent operation, unaffected by wind from the cabinet, ensuring stable and efficient cooling. Furthermore, this top-mounted design facilitates maintenance and provides more internal space for other functional designs. These advantages have led to the increasing adoption of top-mounted chillers over frame-type chillers in energy storage systems. However, because top-mounted chillers operate outside the cabinet, they face harsher environments compared to internal designs. For instance, rain and snow can introduce water into the unit, potentially causing water accumulation and disrupting normal operation. To improve wind turbine efficiency, drainage efficiency, ensure the normal and efficient operation of the unit, and meet the application requirements of energy storage battery systems, designers need to give more consideration to the structural design. Utility Model Content

[0003] The purpose of this invention is to provide a top-mounted chiller unit that can improve the efficiency of the fan.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A top-mounted chiller unit includes: a chassis, in which a fan and a condenser are disposed; a front air inlet and a rear air outlet are disposed at the front of the chassis; a fan mounting wall is disposed within the chassis, the fan mounting wall being located behind the condenser and spaced apart from the condenser; the interior of the chassis is divided by the condenser and the fan mounting wall, forming a return air chamber area, a negative pressure chamber area, and a supply air chamber area from front to back; the return air chamber area is located after the front air inlet; the negative pressure chamber area is located between the condenser and the fan mounting wall; the supply air chamber area is located before the air outlet; and the fan is mounted on the fan mounting wall and located within the supply air chamber area.

[0006] In some embodiments, the distance between the condenser and the fan mounting wall is not less than 50 mm.

[0007] In some embodiments, sealing mounting plates are provided on the left and right sides inside the chassis, the sealing mounting plates are located between the condenser and the fan mounting wall, and the condenser, the fan mounting wall and the sealing mounting plates are fixed together; and / or, a bottom sealing plate is provided inside the chassis, and the condenser and the fan mounting wall are disposed on the bottom sealing plate.

[0008] In some embodiments, a drainage hole is provided at the rear of the chassis; there is a gap between the bottom of the sealing mounting plate and the bottom plate of the chassis; and / or, at least one water passage groove is provided at the bottom of the bottom sealing plate.

[0009] In some embodiments, the height of the water passage is not less than 10 mm; and / or, the total area of ​​the water passage is not less than 120 mm². 2 .

[0010] In some embodiments, the drain hole is located at the rear of the bottom plate of the chassis, and a central drain hole is provided in the middle of the bottom plate.

[0011] In some embodiments, the front air inlet is disposed on the front panel of the chassis, the air outlet is disposed on the back panel of the chassis, and an upper air outlet is disposed at the rear of the top panel of the chassis, with louvers disposed at the upper air outlet.

[0012] In some embodiments, the front air inlet is disposed on the front panel of the chassis, the air outlet is disposed on the back panel of the chassis, and a side air inlet is disposed at the front of the side panel of the chassis, or a side air outlet is disposed at the rear of the side panel of the chassis.

[0013] In some embodiments, an electrical control box is also provided inside the chassis, and the electrical control box is located in the return air cavity area.

[0014] In some embodiments, the electrical control box is suspended by a bracket; and / or, the electrical control box is provided with a waterproof connector at the inlet and outlet holes, and a wire-passing rubber ring is provided at the wire-passing hole of the electrical control box.

[0015] As can be seen from the above technical solution, the casing of this utility model is divided into a return air chamber area, a negative pressure chamber area, and a supply air chamber area at the front, middle, and rear by the condenser and fan mounting wall. The closed negative pressure chamber area formed between the condenser and the fan mounting wall allows the airflow from the condenser side to enter the fan more quickly and effectively. The fan is located in the supply air chamber area closest to the air outlet, which maximizes the air outlet efficiency and improves the overall efficiency of the unit. In some embodiments, the drain hole is located at the rear of the casing. Combined with the front-to-back airflow, rear-to-outflow, and rear-to-drainage structure of the chiller unit, the airflow path is from front to back, forming a pressure-driven structure for drainage, ensuring the directional smoothness of drainage and improving drainage efficiency. Attached Figure Description

[0016] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a top-mounted chiller unit according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of the chassis in an embodiment of this utility model;

[0019] Figure 3 This is an exploded view of the top-mounted chiller unit according to an embodiment of the present invention;

[0020] Figure 4 This is a structural schematic diagram of the chassis from another angle in an embodiment of this utility model;

[0021] Figure 5 for Figure 4 A magnified view of part A in the middle;

[0022] Figure 6 for Figure 4 A magnified view of part B in the middle section;

[0023] Figure 7 for Figure 4 A magnified view of part C in the middle;

[0024] Figure 8 This is a schematic diagram of an embodiment of the present invention showing an electrical control box installed inside the chassis;

[0025] Figure 9 This is a schematic diagram of the internal structure of the electrical control box after the top plate has been removed, according to an embodiment of this utility model.

[0026] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings. In the detailed description of the embodiments of the present invention, for ease of explanation, the drawings illustrating the device structure will be partially enlarged without adhering to the general scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. It should be noted that the drawings are in a simplified form and use non-precise scales, solely for the purpose of conveniently and clearly illustrating the embodiments of the present invention. Additionally, in the description of this application, terms such as "first" and "second" are used only to distinguish descriptions and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Terms such as "positive," "negative," "bottom," "upper," and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 the present invention.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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 also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] like Figure 1 , Figure 2 and Figure 3 As shown, the top-mounted chiller unit in this embodiment includes a casing 1, which houses components such as a centrifugal fan 2, a condenser 3, a compressor (not shown), and a plate evaporator (not shown). The casing 1 includes a front panel, a back panel, side panels, a top panel, and a bottom panel. The front panel and back panel are opposite each other, the top panel and bottom panel are opposite each other, and the two side panels are opposite each other.

[0030] In this embodiment, a front air inlet 1a is provided on the front panel of the chassis 1, and an air outlet 1b is provided on the back panel of the chassis 1. Filters 4 are installed at both the front air inlet 1a and the air outlet 1b to block and filter foreign objects such as sand and gravel from entering the unit, improving the overall reliability of the unit's operation. Optionally, this embodiment also provides side air inlets 1c on both side panels of the chassis 1 for auxiliary air intake. Filters 4 are also provided at the side air inlets 1c. The side air inlets 1c are located at the front of the side panels of the chassis 1, forming a front-in, rear-out air intake structure for the entire unit.

[0031] In some embodiments, an upper air outlet (not shown) can be provided at the rear of the top plate (not shown) of the chassis 1. The upper air outlet is equipped with openable and closable louvers, such as gravity-fed louvers. When the fan is working, the upper air outlet automatically opens under the influence of the airflow, and automatically closes when the fan stops. The louvers at the upper air outlet can also be adjustable, allowing them to not only open when the fan is working and close when the fan stops, but also control the airflow angle for controllable airflow. When closed, the louvers at the upper air outlet reduce the probability of external rain, snow, sand, and dust entering the unit, improving the reliability of the unit's operation. When open, they assist in airflow and improve fan efficiency. The rear air outlet 1b can also use a sealing plate with an array of air outlet holes instead of a filter screen, depending on the airflow requirements. In addition to providing an upper air outlet on the top plate, in some embodiments, a side air outlet can also be provided at the rear of the side plate for auxiliary airflow. Specifically, the side air outlet can be located at the lower part of the rear of the side plate. To avoid draft, when a side air outlet is provided at the rear of the side panel, no air inlet is provided at the front of the side panel.

[0032] In this embodiment, the condenser 3 is located in the middle and rear part of the casing 1. A fan mounting wall 5 is located behind the condenser 3, with an interval between the condenser 3 and the fan mounting wall 5. The condenser 3 can be a microchannel condenser. The centrifugal fan 2 is mounted on the fan mounting wall 5. The casing 1 is divided by the condenser 3 and the fan mounting wall 5, forming three areas from front to back: return air chamber area A, negative pressure chamber area B, and supply air chamber area C. This three-chamber layout structure improves fan efficiency.

[0033] The return air cavity area A is located in the front half of the casing 1, behind the inlet air vent 1a. After the external airflow enters the casing 1, it first enters the return air cavity area A. At this point, the airflow in the return air cavity area A has not yet undergone heat exchange. Components such as the compressor, heat exchanger, and electrical control box can be installed in the return air cavity area A.

[0034] Negative pressure chamber area B is a sealed area formed between the condenser 3 and the fan mounting wall 5. This sealed area allows the centrifugal fan to achieve a better negative pressure state during operation, facilitating faster and more efficient airflow from the condenser 3 side and improving air delivery efficiency. Specifically, the distance between the condenser 3 and the fan mounting wall 5 is no less than 50mm to improve fan efficiency.

[0035] The air supply chamber area C is located at the rear of the casing 1, closest to the air outlet. The centrifugal fan 2 is mounted on the fan mounting wall 5, located within the air supply chamber area C. The centrifugal fan 2, through the rotation of its impeller, diffuses air outwards in a direction perpendicular to the fan's radial direction. Since the farther the fan's outlet point is from the air outlet, the more "obstacles" the overall airflow has to overcome, resulting in greater outlet pressure, this invention places the fan at the rear, within the casing 1, closest to the rear air outlet 1b, to maximize airflow efficiency.

[0036] According to the three-chamber layout structure of this utility model, after the external air field enters the casing 1 from the front air inlet 1a, it passes through the return air chamber area A, the condenser 3, the negative pressure chamber area B, and the fan mounting wall 5 in sequence. Under the action of the centrifugal fan 2 located in the air supply chamber area C, it is dispersed into the air supply chamber area C, and finally flows out through the rear air outlet 1b (and the upper air outlet).

[0037] The number of centrifugal fans 2 mounted on the fan mounting wall 5 in this invention is determined according to the performance of the chiller unit and is not limited here. The fan mounting wall 5 is perpendicular to the base plate of the casing 1 by default. However, when there are specific requirements regarding the overall size of the chiller unit or the diameter of the centrifugal fans, such as when the height of the casing 1 is less than the diameter of the centrifugal fans 2, the fan mounting wall 5 must be tilted, and the centrifugal fans are mounted on the fan mounting wall to form a backward-tilted fan. When the fan mounting wall 5 is tilted, the angle between the fan mounting wall 5 and the base plate of the casing 1 is not less than 45 degrees.

[0038] In some embodiments, sealing mounting plates 6 are provided on the left and right sides inside the chassis 1, and the sealing mounting plates 6 are fixed to the frame of the chassis 1. The sealing mounting plates 6 have two functions: one is to fix the condenser 3 for easy assembly; the other is that the sealing mounting plates 6 are located between the condenser 3 and the fan mounting plate 5, forming a seal on both sides of the negative pressure cavity region B between the condenser 3 and the fan mounting plate 5, ensuring the sealing of the negative pressure cavity region B.

[0039] Since the top-mounted chiller unit is located outside the energy storage cabinet, water may enter the cabinet 1 along with the outside air during rainy or snowy weather, causing water accumulation inside the cabinet 1. Therefore, there is a need for drainage to prevent water accumulation from affecting the operation of the unit or damaging internal components. For the energy storage cabinet, drainage should avoid water flowing along the sides of the cabinet and leaving marks on the surface, which would affect the aesthetics. It is best to drain water from the rear of the cabinet 1. Therefore, in this embodiment, the drainage hole (not shown) is located at the rear of the bottom plate of the cabinet 1.

[0040] Since the air inlet of this utility model is located on the front panel of the chassis 1 and the air outlet is located on the back panel of the chassis 1, the overall direction of airflow inside the chassis 1 is from front to back. Affected by the downward pressure flow of the internal wind field, water entering the chassis 1 from the air inlet will flow backward. Figure 2 The arrow indicates the direction of water flow, and the water is discharged from the drain hole. To achieve backward flow of water, as... Figure 4 , Figure 6 and Figure 7 As shown, there is a gap a between the bottom of the sealing mounting plate 6 and the bottom plate of the chassis 1, so that water can flow from the return air cavity area A to the supply air cavity area C and be discharged from the drain hole at the rear.

[0041] To improve drainage efficiency, in some embodiments, a bottom sealing plate 7 is provided inside the casing 1, and the condenser 3 and the fan mounting wall 5 are mounted on the bottom sealing plate 7. In addition to serving to mount the condenser 3 and the fan mounting wall 5, the bottom sealing plate 7 also seals the bottom between the condenser 3 and the fan mounting wall 5, ensuring that the negative pressure chamber area B is a closed space. After air enters the negative pressure chamber area B from the condenser 3, it can only enter the air supply chamber area C from the air outlet of the centrifugal fan 2.

[0042] like Figure 4 , Figure 5 As shown, the bottom of the bottom sealing plate 7 is provided with at least one water passage groove 7a, so that water can not only enter the air supply cavity area C from below the sealing mounting plate 6, but also pass through the negative pressure cavity area B from the water passage groove 7a at the bottom of the bottom sealing plate 7 and enter the air supply cavity area C. This underpass drainage structure can make the accumulated water drain out of the casing 1 as soon as possible.

[0043] In some embodiments, a central drainage hole Q can be provided in the middle of the bottom plate of the chassis 1, so that some of the accumulated water can be discharged outward from the central drainage hole Q in advance, thereby accelerating the drainage speed.

[0044] In practical applications, the cross-sectional shape of the water passage 7a is rectangular, the height h of the water passage 7a is not less than 10mm, and the total area of ​​the water passage 7a on the bottom sealing plate 7 is not less than 120mm². 2 This ensures that the accumulated water can flow smoothly through the water tank 7a.

[0045] like Figure 8 and Figure 9 As shown, in some embodiments, the electrical control box 8 is located in the return air cavity area A within the chassis 1, and is positioned after the front air inlet 1a. In this embodiment, the electrical control box 8 is suspended by a bracket 9, and the space below the electrical control box 8 facilitates wiring. By placing the electrical control box 8 within the return air cavity area A, when the external airflow enters the chassis 1, it can remove the heat generated by the electrical control box 8 during operation, improving the long-term reliability of the internal components of the electrical control box. It also allows for air circulation around the electrical control box 8, reducing the risk of moisture entering the interior of the electrical control box 8.

[0046] In some embodiments, a threaded waterproof connector 10 is provided at the inlet and outlet holes of the electrical control box 8 to prevent water from entering the interior of the electrical control box 8 through the inlet and outlet holes after water has accumulated on the outer surface of the electrical control box 8, thus preventing damage to the internal components of the electrical control box 8. Furthermore, the waterproof connector 10 should be located as far away as possible from the air inlet (including the front air inlet and the side air inlet) to reduce the possibility of direct or indirect water splashing onto the inlet and outlet holes.

[0047] Since the electrical control box 8 is suspended, the possibility of water entering the electrical control box 8 from the bottom is very small. In some embodiments, the wiring hole 8a is located at the bottom of the electrical control box 8, and a wiring rubber ring 11 is installed at the wiring hole to facilitate the entry and exit of multiple wire harnesses and to provide a seal. The waterproof connector and wiring rubber ring ensure the moisture resistance of the electrical control box, providing a safe operating environment for the electrical components inside.

[0048] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A top-mounted chiller unit, comprising: The chassis, wherein a fan and a condenser are installed inside the chassis; characterized in that: The front of the chassis is provided with an air inlet and the rear is provided with an air outlet. A fan mounting wall is provided inside the chassis. The fan mounting wall is located behind the condenser and is arranged at a distance from the condenser. The chassis is divided by the condenser and the fan mounting wall, forming a return air chamber area, a negative pressure chamber area and a supply air chamber area from front to back. The return air chamber area is located after the front air inlet, the negative pressure chamber area is located between the condenser and the fan mounting wall, and the supply air chamber area is located before the air outlet. The fan is mounted on the fan mounting wall and located in the supply air chamber area.

2. The overhead chiller unit as described in claim 1, characterized in that: The distance between the condenser and the wall on which the fan is mounted shall not be less than 50 mm.

3. The top-mounted chiller unit as described in claim 1, characterized in that: Sealing mounting plates are provided on the left and right sides inside the chassis. The sealing mounting plates are located between the condenser and the fan mounting wall. The condenser, the fan mounting wall and the sealing mounting plates are fixed together. And / or, a bottom sealing plate is provided inside the chassis, and the condenser and the fan mounting wall are provided on the bottom sealing plate.

4. The top-mounted chiller unit as described in claim 3, characterized in that: The rear of the chassis is provided with a drainage hole; There is a gap between the bottom of the sealing mounting plate and the bottom plate of the chassis; and / or, the bottom of the bottom sealing plate is provided with at least one water passage groove.

5. The top-mounted chiller unit as described in claim 4, characterized in that: The height of the water passage trough shall not be less than 10mm; And / or, the total area of ​​the water passage is not less than 120 mm². 2 .

6. The top-mounted chiller unit as described in claim 4, characterized in that: The drainage hole is located at the rear of the bottom plate of the chassis, and a central drainage hole is provided in the middle of the bottom plate.

7. The top-mounted chiller unit as described in claim 1, characterized in that: The front air inlet is located on the front panel of the chassis, the air outlet is located on the back panel of the chassis, and the rear of the top panel of the chassis has an upper air outlet with louvers.

8. The top-mounted chiller unit as described in claim 1, characterized in that: The front air inlet is located on the front panel of the chassis, the air outlet is located on the back panel of the chassis, and the front of the side panel of the chassis is provided with a side air inlet, or the rear of the side panel of the chassis is provided with a side air outlet.

9. The top-mounted chiller unit as described in claim 1, characterized in that: The chassis also contains an electrical control box, which is located within the return air cavity area.

10. The top-mounted chiller unit as described in claim 9, characterized in that: The electrical control box is suspended in mid-air by a bracket. And / or, the electrical control box is provided with a waterproof connector at the inlet and outlet of the wiring port, and a wire-passing rubber ring is provided at the wire-passing hole of the electrical control box.

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