Drainage type centrifugal fan

Abstract

The utility model relates to a drainage type centrifugal fan which can be connected with a refrigerating system and is provided with a shell, an impeller, an air outlet and a hole. The shell is provided with an internal space. The impeller is located in the interior space. An opening of the air outlet faces upwards, and the upper portion of the air outlet is connected with a refrigerating system. The hole is located in the bottom of the shell, located in the other side, opposite to the air outlet, of the shell and communicated with the inner space. The drainage type centrifugal fan has the advantages that the hole is additionally formed in the bottom of the shell, so that condensate water flowing into the drainage type centrifugal fan can be discharged out of the shell, the condensate water cannot be accumulated in the shell and cannot affect machinery in the drainage type centrifugal fan, and the problems of air leakage and pressure relief cannot be caused in the aspect of the performance of the drainage type centrifugal fan.

Description

Technical Field

[0001] The utility model relates to a drainage type centrifugal fan. Background Art

[0002] Centrifugal fans are a very common type of air handling equipment in today's life. They are used to move or compress gases and can be seen in kitchen range hoods or air conditioning systems.

[0003] The existing centrifugal fan has an air inlet and an air outlet. The air outlet is connected to a duct, a heat dissipation system or a refrigeration system. However, when the refrigeration system is located above the air outlet of the centrifugal fan, the condensed water produced by the refrigeration system will flow into the centrifugal fan through the air outlet of the centrifugal fan, affecting the machinery inside the centrifugal fan. The condensed water cannot be discharged, and over time, the mechanical body inside the centrifugal fan will be damaged by moisture.

[0004] In view of this, proposing a better improvement plan is an urgent problem to be solved in the industry. Utility Model Content

[0005] The main purpose of the utility model is to provide a drainage type centrifugal fan to solve the problem that when the refrigeration system is located above the air outlet of the centrifugal fan, the condensed water produced by the refrigeration system will enter the centrifugal fan through the air outlet of the centrifugal fan and affect the mechanical inside of the centrifugal fan.

[0006] To achieve the above-mentioned purpose, the utility model provides a drainage type centrifugal fan, which has:

[0007] An air outlet, the opening of which faces upward;

[0008] A housing having an inner space connected to the air outlet;

[0009] an impeller located in the interior space; and

[0010] A hole is located at the bottom of the shell and at the other side relative to the air outlet and communicates with the internal space.

[0011] As mentioned above, the drainage type centrifugal fan, wherein the shape of the hole includes a rectangle.

[0012] As mentioned above, the drainage type centrifugal fan, wherein the shape of the hole includes a circle.

[0013] In the aforementioned drainage type centrifugal fan, the center of the hole passes through the center line of the shell width.

[0014] In the drainage type centrifugal fan as described above, the extension line of the center of the hole passes through the center of the impeller.

[0015] As mentioned above, in the drainage type centrifugal fan, the opening area of ​​the hole located on the inner surface of the shell is larger than the opening area of ​​the hole located on the outer surface of the shell.

[0016] As mentioned above, the drainage type centrifugal fan can be connected to a refrigeration system, and the refrigeration system is connected above the air outlet.

[0017] The advantage of the utility model is that a hole is added, which is located at the bottom of the shell, so that the condensed water flowing into the drainage centrifugal fan can be discharged from the shell, so that the condensed water will not accumulate in the shell, affecting the machinery in the drainage centrifugal fan, and also solves the problem of damage to the machinery caused by moisture due to long-term failure to discharge the condensed water. In addition, the hole can not only easily discharge the condensed water accumulated in the shell, but also will not cause air leakage and pressure relief problems in the performance of the drainage centrifugal fan. When the wind force is strong, the hole will form a small air inlet, which helps to increase the wind entering the shell and slightly increase the wind flow. When the wind force is weak, the wind will not enter and exit through the hole, so that the hole is like a side wall without a hole, and will not affect the pressure of the internal space of the shell. In addition, the design of the hole also helps to discharge noise, and no longer resonates in the closed shell, thereby achieving the effect of reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0019] Figure 2 It is a three-dimensional schematic diagram of the utility model from another angle;

[0020] Figure 3 It is a bottom view schematic diagram of the utility model;

[0021] Figure 4 It is a front view schematic diagram of the utility model;

[0022] Figure 5 It is a rear view schematic diagram of the utility model;

[0023] Figure 6 It is a cross-sectional schematic diagram of the utility model;

[0024] Figure 7 The wind volume and static pressure diagrams of the present invention and the prior art are shown.

[0025] Main component symbols:

[0026] A: Refrigeration system;

[0027] 10: housing;

[0028] 20: impeller;

[0029] 30: air outlet;

[0030] 40: holes;

[0031] 50: Imaginary center line. DETAILED DESCRIPTION

[0032] The following is a combination of drawings and preferred embodiments of the present invention to further illustrate the technical means used by the present invention to achieve the intended purpose of the present invention.

[0033] Please refer to Figure 1 , Figure 2 , Figure 3 as well as Figure 6 The utility model provides a drainage type centrifugal fan, which can be connected to a refrigeration system A. The drainage type centrifugal fan has a housing 10, an impeller 20, an air outlet 30 and a hole 40, and is defined by an imaginary center line 50. In this embodiment, the drainage type centrifugal fan is in direct contact with the refrigeration system A, but the connection method between the drainage type centrifugal fan and the refrigeration system A is not limited to this, and the drainage type centrifugal fan and the refrigeration system A can also be connected through a pipeline, as long as the condensed water produced by the refrigeration system A can be introduced into the drainage type centrifugal fan.

[0034] The housing 10 has an internal space. The impeller 20 is located in the internal space. The drainage centrifugal fan of the utility model can be set at different angles, whereby the rotating shaft of the impeller 20 can be horizontal, vertical, or at other angles. The following is an exemplary description of the rotating shaft of the impeller 20 being horizontal. The opening of the air outlet 30 faces upward, and the upper part of the air outlet 30 is connected to the refrigeration system A and communicates with the internal space of the housing 10.

[0035] Please refer to Figures 3 to 6 . The hole 40 is located at the bottom of the shell 10, and is located on the other side relative to the air outlet, and is connected to the internal space. In other words, in order from top to bottom in terms of horizontal height, there are the air outlet 30, the impeller 20, and the hole 40. In embodiments where the rotation axis of the impeller 20 is at other angles, the hole 40 is still located at the lowest point of the shell 10. In this embodiment, the shape of the hole 40 is a rectangle, but is not limited to this. In other embodiments, the shape of the hole 40 may also be a circle or a square. The opening area of ​​the hole 40 on the inner surface of the shell 10 is larger than the opening area of ​​the hole 40 on the outer surface of the shell 10. In other embodiments, the openings of the hole 40 on the inner and outer surfaces of the shell 10 may have the same size.

[0036] The imaginary center line 50 is located on the bottom surface of the housing 10, and the shortest distances from any point on the imaginary center line 50 to the front and rear sides of the housing 10 are the same. In this embodiment, the center of the hole 40 passes through the imaginary center line 50. In other words, the distances from the center of the hole 40 to the front and rear sides of the housing 10 are the same. The extension line of the center of the hole 40 passes through the center of the impeller 20, and the center of the impeller 20 includes the rotation axis of the impeller 20. In other words, the extension line of the center of the hole 40 passes through the rotation axis of the impeller 20. However, the position of the hole 40 is not limited to this. In other embodiments, the center of the hole 40 can be offset toward the front and rear sides of the housing 10 or toward the direction of the air outlet 30, and it is only necessary to keep the hole 40 including the bottom of the housing 10.

[0037] The drainage centrifugal fan is connected to a refrigeration system A, which is located above the air outlet 30 of the drainage centrifugal fan. When the condensed water produced by the refrigeration system A flows into the drainage centrifugal fan through the air outlet 30, it flows along the inner surface of the shell 10 to the bottom of the shell 10 and leaves the drainage centrifugal fan through the hole 40.

[0038] The advantage of the present invention is that a hole 40 is added, which is located at the bottom of the shell 10, so that the condensed water flowing into the drainage type centrifugal fan can be discharged from the shell 10, so that the condensed water will not accumulate in the shell 10 and affect the machinery in the drainage type centrifugal fan, and the problem of the machinery being damaged by moisture due to the condensed water not being discharged for a long time is solved.

[0039] In addition, the hole 40 can not only easily discharge the condensed water accumulated in the housing 10, but also does not cause air leakage and pressure relief problems in terms of the performance of the drainage centrifugal fan. When the wind force is strong, the hole 40 will form a small air inlet, which helps to increase the wind entering the housing 10 and slightly increase the wind flow. When the wind force is weak, the wind will not enter and exit through the hole 40. The hole 40 is like a side wall without a hole, and does not affect the static pressure of the housing 10. In addition, the design of the hole 40 also helps to discharge noise without resonating in the closed housing 10, thereby achieving the effect of reducing noise. In this embodiment, the noise is reduced from 31.6dB to 25.6dB, a decrease of 15% to 20%.

[0040] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A drainage type centrifugal fan, characterized in that: have: An air outlet, the opening of which faces upward; A housing having an inner space connected to the air outlet; an impeller located in the interior space; as well as A hole is located at the bottom of the shell and at the other side relative to the air outlet and communicates with the internal space.

2. The drainage type centrifugal fan according to claim 1, characterized in that: The shape of the hole includes a rectangle.

3. The drainage type centrifugal fan according to claim 1, characterized in that: The shape of the hole includes a circle.

4. The drainage type centrifugal fan according to any one of claims 1 to 3, characterized in that: The center of the hole passes through the center line of the housing width.

5. The drainage type centrifugal fan according to any one of claims 1 to 3, characterized in that: An extension line of the center of the hole passes through the center of the impeller.

6. The drainage type centrifugal fan according to any one of claims 1 to 3, characterized in that: The opening area of ​​the hole located on the inner surface of the shell is larger than the opening area of ​​the hole located on the outer surface of the shell.

7. The drainage type centrifugal fan according to any one of claims 1 to 3, characterized in that: The drainage type centrifugal fan can be connected to a refrigeration system, and the refrigeration system is connected above the air outlet.

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