Drainage system, frequency converter, air conditioning unit

Abstract

This invention provides a drainage device, a frequency converter, and an air conditioning unit. The drainage device includes a drain pipe with an inlet and an outlet. An end cap is provided at the outlet, and the end cap has multiple first drain holes communicating with the drainage channel. An overflow hole penetrating the inside and outside of the drain pipe wall is constructed on the pipe wall. A baffle is also provided inside the drainage channel. An elastic element is clamped between the end cap and the baffle. The baffle has flow holes penetrating its two end faces. The baffle has a normal drainage state (on the side of the overflow hole closer to the inlet) and an overflow drainage state (on the side of the overflow hole farther from the inlet). The baffle can switch from the normal drainage state to the overflow drainage state under the force of condensate water on it. This invention effectively prevents the risk of damage to internal components of the frequency converter due to condensate water retention in the drain pipe and delayed drainage.

Description

Technical Field

[0001] This utility model belongs to the field of air conditioning technology, specifically relating to a drainage device, a frequency converter, and an air conditioning unit. Background Technology

[0002] Patent publication number CN222605758U relates to the field of frequency converter cabinet technology, and in particular to a dustproof device for frequency converter cabinets. The device includes a frequency converter cabinet body, a base fixedly installed at the bottom of the cabinet body, a cabinet door on one side of the cabinet body, an electrical module inside the cabinet body, a heat dissipation component inside the cabinet body, and a collection and cleaning drawer on the cabinet body. The device uses a filter vibration structure, a dustproof mesh vibration structure, and a second dustproof component to remove dust from the air entering the frequency converter cabinet. Then, a first motor drives two cams to intermittently actuate the filter and the first dustproof mesh, causing them to vibrate and prevent dust blockage. This prevents dust and insects from entering the frequency converter cabinet and falling between the internal electrical components, reducing the risk of short circuits. This not only avoids electrical malfunctions but also prevents fires caused by short circuits.

[0003] The utility model patent with publication number CN117375377A relates to the field of frequency converter technology, specifically disclosing a dustproof device for frequency converters. The device includes a housing, a drive rotation mechanism fixed to one side of the worm gear, the drive rotation mechanism passing through the other side of the housing and fixed to it, and the top of the drive rotation mechanism connected to a blowing channel via a connecting pipe. The blowing channel is fixed to the inner top of the housing, and a fan is fixed inside the blowing channel. This dustproof device for frequency converters uses a power control device that controls an AC motor by changing the frequency of the motor's operating power supply. The fan blows air downwards for convenient heat dissipation. A dustproof net separates dust and impurities for effective dust prevention. Before blowing air into the housing, an electric heating net can be used to heat and dry the air. The electric heating net rotates slightly in both directions, and the guide channel rotates back and forth, allowing the air to efficiently and fully contact the entire surface of the electric heating net, thus improving the efficiency of the electric heating net.

[0004] The aforementioned existing inverters are generally equipped with drain holes to promptly drain condensate generated by the air conditioning structure inside the inverter, preventing excessive condensate buildup that could damage the internal electrical components. However, the drain holes connect the inverter's interior to the outside environment. Without proper insect and dust protection, external dust and insects can enter the inverter through the drain holes, potentially damaging internal components. To address this, related technologies include filters at the drain holes to prevent dust, insects, and other foreign objects from entering. However, when these filters become clogged, the condensate generated inside the inverter cannot drain promptly, leading to condensate buildup and increasing the risk of component damage. Utility Model Content

[0005] Therefore, this utility model provides a drainage device, frequency converter, and air conditioning unit that can overcome the technical problem in related technologies where drainage devices with filter structures cannot discharge condensate in time when clogged, increasing the risk of component damage.

[0006] To address the aforementioned problems, this utility model provides a drainage device, including a drain pipe. The drain pipe has an inlet end and an outlet end in its drainage channel. The outlet end is provided with an end cap, and the end cap has a plurality of first drain holes communicating with the drainage channel. The drain pipe wall has an overflow hole penetrating the inside and outside of the pipe wall. A baffle is also provided inside the drainage channel. An elastic element is clamped between the end cap and the baffle. The baffle has a flow hole penetrating its two end faces. The baffle has a normal drainage state on the side of the overflow hole closer to the inlet end and an overflow drainage state on the side of the overflow hole farther from the inlet end. The baffle can switch from the normal drainage state to the overflow drainage state under the force of the condensate on it.

[0007] In some embodiments, the elastic element is a helical spring, and the two ends of the helical spring are respectively connected to the end cap and the baffle to form an elastic drainage assembly; and / or, the helical spring, the end cap and the baffle are coaxially arranged.

[0008] In some embodiments, the end cap is detachably connected to the drain pipe.

[0009] In some embodiments, the end cap is threaded onto the drain pipe.

[0010] In some embodiments, each flow hole on the baffle and each first drain hole on the end cap are evenly spaced around the helical spring.

[0011] In some embodiments, the end cap has a plug corresponding to the drainage channel and a mating ring that mates with the drainage pipe assembly. The mating ring surrounds the plug and has a second drainage hole. The overflow hole communicates with the second drainage hole. And / or, the diameter of the first drainage hole is smaller than the diameter of the overflow hole.

[0012] In some embodiments, the number of the second drain holes is equal to the number of the overflow holes and their positions correspond one-to-one, and each of the second drain holes and each of the overflow holes are connected by a conduit.

[0013] In some embodiments, the two ends of each of the conduits are respectively inserted into the second drain hole and the overflow hole by an interference fit.

[0014] This utility model also provides a frequency converter, including a water receiving tray, the water receiving tray having a drain outlet, and the drain outlet being provided with the aforementioned drainage device.

[0015] This utility model also provides an air conditioning unit, including the above-mentioned frequency converter.

[0016] The drainage device, frequency converter, and air conditioning unit provided by this utility model have the following beneficial effects:

[0017] When the flow holes on the baffle are blocked by dirt or when the discharge from the first drain hole is insufficient due to excessive condensate, the condensate will accumulate at the inlet of the drain channel, leading to increased pressure. When the pressure of the condensate exceeds the elastic force of the elastic element, the baffle will switch from normal drainage to overflow drainage. That is, the baffle will fall from the upper side to the lower side of the overflow hole, and the condensate will overflow from the overflow hole and be discharged from the drain pipe. This effectively prevents the risk of damage to the internal components of the frequency converter caused by the condensate accumulating in the drain pipe and not being discharged in time.

[0018] Connecting the elastic element, end cap, and baffle into one unit facilitates quick assembly with the drain pipe. At the same time, using a helical spring can make full use of the flow-through effect of the helical spring pitch clearance, which is conducive to forming a larger flow-through drainage area on the end cap and baffle. The coaxial arrangement of the helical spring, end cap, and baffle ensures the stability of the bottom support of the baffle and the smoothness of the baffle state switching.

[0019] The end cap can be detachably assembled onto the drain pipe, allowing the elastic drainage component to be completely removed for cleaning when blockage occurs in the first drain hole, overflow hole, or drain channel. The operation is simple and convenient.

[0020] The overflow hole is connected to the second drain hole formed on the end cap. On the one hand, this simplifies the structural design of the drainage device. On the other hand, it facilitates the final discharge of overflow condensate. Furthermore, it allows users to observe the drainage situation at the outer end face of the end cap and accurately determine whether the drainage channel is blocked by different drainage conditions, thus reminding users to clean it in a timely manner.

[0021] By using external conduits to connect each overflow hole with each second drain hole, there is no need to make corresponding flow channels inside the drain pipe, thus reducing the difficulty of component manufacturing. At the same time, using externally assembled conduits allows for maintenance and repair, reducing maintenance costs. Attached Figure Description

[0022] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0023] Figure 1 This is a schematic diagram (appearance) of the drainage device according to an embodiment of the present utility model;

[0024] Figure 2 yes Figure 1 Cross-sectional view of AA (baffle in normal drainage state);

[0025] Figure 3 yes Figure 2 A magnified view of a section at point B in the middle;

[0026] Figure 4 yes Figure 1 Cross-sectional view of AA (baffle in overflow drainage state);

[0027] Figure 5 This is a schematic diagram showing the state of the drainage device in this utility model assembled on the water receiving tray of the frequency converter.

[0028] The attached figures are labeled as follows:

[0029] 1. Drain pipe; 11. Overflow hole; 2. End cap; 201. Blocking plate; 202. Matching ring; 21. First drain hole; 22. Second drain hole; 3. Baffle; 31. Flow hole; 4. Elastic element; 5. Guide tube; 100. Water receiving tray. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0031] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" 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 utility model and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0032] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90° or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0033] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0034] See also Figures 1 to 5As shown, according to an embodiment of the present invention, a drainage device is provided, including a drainage pipe 1. In one specific embodiment, the drainage pipe 1 is a cylindrical body. The drainage channel of the drainage pipe 1 (not labeled in the figure) has an inlet end (not labeled in the figure) and an outlet end (not labeled in the figure). The outlet end is provided with an end cap 2, which seals the outlet end. The end cap 2 is constructed with a plurality of first drainage holes 21 communicating with the drainage channel. The pipe wall of the drainage pipe 1 is constructed with an overflow hole 11 penetrating the inside and outside of the pipe wall. A baffle 3 is also provided in the drainage channel. An elastic element 4 is clamped between the end cap 2 and the baffle 3. The baffle 3 has a flow hole 31 penetrating its two end faces. The baffle 3 is in a normal drainage state (e.g., the overflow hole 11 is close to the inlet end) on the side of the overflow hole 11. Figure 2 (as shown) and the overflow drainage state on the side of the overflow hole 11 away from the inlet end (as shown) Figure 4 As shown, the baffle 3 can switch from the normal drainage state to the overflow drainage state under the force of the condensate water on it. It is understood that the force of the condensate water should overcome the elastic force of the elastic element 4. When the force of the condensate water is insufficient to overcome the elastic force of the elastic element 4, the baffle 3 will switch from the overflow drainage state to the normal drainage state under the elastic restoring force of the elastic element 4. In a preferred embodiment, the baffle 3 slides in contact with the inner wall of the drainage channel to ensure a smooth and reliable state switching of the baffle 3.

[0035] In this technical solution, when the flow hole 31 on the baffle 3 is blocked by dirt or when the discharge from the first drain hole 21 is insufficient due to excessive condensate, condensate accumulates at the inlet of the drainage channel, leading to increased pressure. When the condensate pressure exceeds the elastic force of the elastic element 4, the baffle 3 switches from normal drainage to overflow drainage, meaning the baffle 3 falls from the upper side to the lower side of the overflow hole 11. At this time, the condensate overflows from the overflow hole 11 and is discharged from the drain pipe 1, effectively preventing the risk of damage to internal components of the frequency converter due to condensate accumulating in the drain pipe 1 and not being discharged in time. It is understandable that the design of the first drain hole 21 effectively prevents external foreign objects from entering the frequency converter through the drain pipe 1.

[0036] In some embodiments, the elastic element 4 is a helical spring, and the two ends of the helical spring are respectively connected to the end cap 2 and the baffle 3 to form an elastic drainage assembly; and / or, the helical spring, the end cap 2 and the baffle 3 are coaxially arranged, and the two ends of the helical spring can be reliably connected to the end cap 2 and the baffle 3 by means of bonding or welding, for example.

[0037] In this technical solution, the elastic element 4, end cap 2, and baffle 3 are connected as one unit, which facilitates quick assembly with the drain pipe 1. At the same time, the use of a helical spring can make full use of the flow-through effect of the pitch gap of the helical spring, which is conducive to forming a larger flow-through drainage area on the end cap 2 and baffle 3. The coaxial arrangement of the helical spring, end cap 2, and baffle 3 can ensure the stability of the bottom support of baffle 3 and the smoothness of the state switching of baffle 3.

[0038] In a preferred embodiment, the diameter of the first drain hole 21 is smaller than the diameter of the flow hole 31, so that the buffering effect of the drainage channel between the baffle 3 and the end cap 2 can be used to form pressure and reduce the probability of blockage of the first drain hole 21.

[0039] In some embodiments, the end cap 2 is detachably connected to the drain pipe 1. In one specific embodiment, the end cap 2 is threaded onto the drain pipe 1.

[0040] In this technical solution, the end cap 2 is detachably assembled onto the drain pipe 1, which allows the elastic drainage component to be completely removed for cleaning when blockage occurs in the first drain hole 21, the overflow hole 31, or the drainage channel. The operation is simple and convenient.

[0041] In some embodiments, each flow hole 31 on the baffle 3 and each first drain hole 21 on the end cap 2 are evenly spaced around the helical spring, which can ensure the maximization of the drainage flow area.

[0042] See details Figure 3 As shown, in some embodiments, the end cap 2 has a blocking plate 201 corresponding to the drainage channel and a fitting ring 202 that fits with the drainage pipe 1. The aforementioned first drainage hole 21 is formed on the blocking plate 201. The fitting ring 202 is arranged around the blocking plate 201. The fitting ring 202 is provided with a second drainage hole 22. The overflow hole 11 communicates with the second drainage hole 22.

[0043] In this technical solution, the overflow hole 11 is connected to the second drain hole 22 formed on the end cover 2. On the one hand, it can simplify the structural design of the drainage device. On the other hand, it facilitates the final discharge treatment of overflow condensate. Furthermore, it allows users to observe the drainage situation at the outer end face of the end cover 2 and accurately judge whether the drainage channel is blocked by different drainage conditions, thereby reminding users to clean it in a timely manner.

[0044] Specifically, when only the first drain hole 21 has condensate flowing out, it indicates that the baffle 3 in the drainage device is in normal drainage state and the drainage channel is smooth and unobstructed. When both the first drain hole 21 and the second drain hole 22 have condensate flowing out at the same time, it indicates that the baffle 3 in the drainage device is in overflow drainage state. At this time, the amount of condensate is large, and the overflow hole 11 can provide beneficial compensation for the drainage volume. The drainage channel is smooth and unobstructed. When only the second drain hole 22 has condensate flowing out, that is, when the first drain hole 21 has no condensate flowing out, it indicates that the first drain hole 21 and / or the overflow hole 31 are blocked. At this time, the elastic drainage component can be removed from the drainage channel for cleaning.

[0045] In some embodiments, the number of the second drain holes 22 is equal to the number of the overflow holes 11 and their positions correspond one-to-one. Each of the second drain holes 22 and each of the overflow holes 11 are connected by a conduit 5.

[0046] In this technical solution, each overflow hole 11 and each second drain hole 22 are connected by an external conduit 5, eliminating the need to make corresponding flow channels inside the drain pipe 1, thereby reducing the difficulty of component manufacturing. At the same time, the externally assembled conduit 5 can be maintained and repaired, reducing maintenance costs.

[0047] In some embodiments, the two ends of each of the conduits 5 are respectively inserted into the second drain hole 22 and the overflow hole 11 with an interference fit, simplifying the assembly process of the conduit 5 with the second drain hole 22 and the overflow hole 11. In a specific embodiment, the conduit 5 is made of a different material than the drain pipe 1 and the end cap 2, so that the thermal expansion rates of the conduit 5, the drain pipe 1, and the end cap 2 are different, thus allowing the aforementioned interference fit to be achieved during assembly or disassembly through cold or hot fitting.

[0048] According to an embodiment of the present invention, a frequency converter is also provided, including a water receiving tray 100. The water receiving tray 100 is located below an evaporator (not shown in the figure) configured inside the frequency converter and is used to receive condensate generated by the evaporator during operation. The water receiving tray 100 has a drain outlet (not labeled in the figure) and the drain outlet is provided with the aforementioned drainage device.

[0049] According to an embodiment of the present invention, an air conditioning unit is also provided, including the frequency converter described above.

[0050] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0051] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A drainage device, characterized in that, The system includes a drain pipe (1), the drain pipe (1) having an inlet end and an outlet end, the outlet end being provided with an end cap (2), the end cap (2) having a plurality of first drain holes (21) communicating with the drain channel, the drain pipe (1) having an overflow hole (11) penetrating the inside and outside of the pipe wall, the drain channel also having a baffle (3), the end cap (2) and the baffle (3) being clamped together with an elastic element (4), the baffle (3) having a flow hole (31) penetrating its two end faces, the baffle (3) having a normal drainage state on the side of the overflow hole (11) close to the inlet end and an overflow drainage state on the side of the overflow hole (11) away from the inlet end, the baffle (3) being able to switch from the normal drainage state to the overflow drainage state under the force of the condensate on it.

2. The water drainage device according to claim 1, characterized in that The elastic element (4) is a helical spring, and the two ends of the helical spring are respectively connected to the end cap (2) and the baffle (3) to form an elastic drainage assembly; and / or, the helical spring, the end cap (2) and the baffle (3) are coaxially arranged.

3. The drainage device according to claim 2, characterized in that, The end cap (2) is detachably connected to the drain pipe (1).

4. The drainage device according to claim 3, characterized in that, The end cap (2) is threaded onto the drain pipe (1).

5. The drainage device according to claim 2, characterized in that, Each flow hole (31) on the baffle (3) and each first drain hole (21) on the end cap (2) are evenly spaced around the helical spring.

6. The drainage device according to claim 1, characterized in that, The end cap (2) has a plug plate (201) corresponding to the drainage channel and a fitting ring (202) that fits with the drainage pipe (1). The fitting ring (202) is arranged around the plug plate (201). The fitting ring (202) is provided with a second drainage hole (22). The overflow hole (11) communicates with the second drainage hole (22). And / or, the diameter of the first drainage hole (21) is smaller than the diameter of the overflow hole (31).

7. The drainage device according to claim 6, characterized in that, The number of the second drain holes (22) is equal to that of the overflow holes (11) and their positions correspond one-to-one. Each second drain hole (22) and each overflow hole (11) are connected through a conduit (5).

8. The drainage device according to claim 7, characterized in that, The two ends of each of the conduits (5) are respectively inserted into the second drain hole (22) and the overflow hole (11) by an interference fit.

9. A frequency converter, comprising a water receiving tray (100) having a drain outlet, characterized in that, The drain outlet is provided with a drainage device as described in any one of claims 1 to 8.

10. An air conditioning unit, characterized in that, Including the frequency converter as described in claim 9.

Images