Lower air supply air conditioning unit

Abstract

The utility model provides a lower air supply air conditioning unit which comprises an evaporator, a water pan and a cyclone cylinder, the water pan is located at the lower end of the evaporator, an air channel allowing airflow to flow through is defined in the evaporator, a ventilation opening is formed in the position, below the air channel, of the water pan, and the cyclone cylinder is further arranged on the water pan and located in the air channel. A hollow cavity is formed in the cyclone cylinder, the cyclone cylinder covers the upper end of the ventilation opening, so that the lower end of the hollow cavity communicates with the ventilation opening, and the cyclone cylinder can introduce gas in the air duct into the hollow cavity, so that airflow on the periphery of the evaporator enters the air duct after being subjected to heat exchange through the evaporator, and enters the interior of the cyclone cylinder for gas-liquid separation; and the separated gas downwards passes through the ventilation opening and flows out. According to the air conditioner indoor unit, the problem that part of condensate water at the bottom of the evaporator in the air conditioner indoor unit flows along with return air and splashes down into a lower air duct can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning technical field, concretely relates to a lower air supply air conditioning unit. BACKGROUND

[0002] With the large application of 4G and the gradual popularization of 5G, the heat generation of various data processing equipment is more and more large, and the data center is more and more high to the refrigerating capacity, energy saving, safety of air conditioning equipment, wherein the condensate water produced by the refrigerating unit is strictly prohibited to leak or enter the data machine room with return air.

[0003] The existing lower air supply refrigerating unit structure schematic diagram is as Figure 1As shown, the unit comprises an overall frame, a centrifugal fan and an evaporator arranged in the frame, wherein the evaporator is arranged at the upper part of the frame and the centrifugal fan is arranged at the bottom of the frame; the bottom end of the centrifugal fan component is fixed to the bottom plate of the frame of the refrigeration unit when the unit is shipped, and when the unit is installed on site, the fixing device is removed and the centrifugal fan component is moved downward into the overhead layer, and the upper end of the centrifugal fan component is fixed to the bottom plate of the frame again; when the centrifugal fan is running, the return air passes through the fin gap of the evaporator from the outside of the refrigeration unit, converges to the center and then flows downward through the bottom of the refrigeration unit into the centrifugal fan, and under the action of the centrifugal fan, the return air enters the overhead layer; the bottom of the evaporator is provided with a water pan, which is horizontally fixed on the overall frame as one of the support installation structures of the evaporator, receives the low-temperature condensed water generated by the evaporator during refrigeration, and is discharged through a drain pipe, the middle position of the water pan is hollow and has an inner frame arranged upward, the adjacent positions of the inner frames of each water pan are welded and sealed to prevent leakage of condensed water, and the hollow structure formed by the inner frame of the water pan serves as a flow hole for the return air to enter the lower part of the unit from the upper part of the unit; when the refrigeration unit is working, the return air passes through the evaporator under the suction action of the centrifugal fan, and after air heat exchange and refrigeration, the return air enters the centrifugal fan from top to bottom, and is sent into the overhead layer after being pressurized and accelerated by the centrifugal fan, the water vapor in the air is condensed on the evaporator, the condensed water flows into the water pan, and is discharged through the drain pipe on the water pan; the condensed water of the evaporator flows downward along the surface of the heat exchange fin under the action of gravity and converges into the water pan at the bottom of the evaporator, so the closer to the water pan, the more condensed water is collected, and even the fin gap in the bottom area of the evaporator is filled with condensed water, which makes it difficult for the return air to pass through the fin gap filled with condensed water, thereby affecting the heat exchange effect of this area; in addition, when the fin gap in the bottom area is filled with discontinuous condensed water, the flowable gap in the fin gap becomes smaller, thereby increasing the speed of the passing return air, and under the suction action of the centrifugal fan, the amount of return air near the bottom of the evaporator of the centrifugal fan is greater than that of the upper part of the evaporator, and these two factors superimposed may carry the condensed water between the fins at the bottom of the evaporator away from the fin surface, and part of the condensed water flows with the return air and splashes, which is more obvious in the high-temperature and humid return air and large cooling capacity and large air volume operating conditions.

[0004] The prior arts CN205048796U, CN204648520U and CN201335465Y all adopt the structure of splitting a large-height evaporator into multiple small-height evaporators and stacking them again to form an evaporator component, and a dedicated water pan is arranged at the bottom of each evaporator to receive the condensed water or defrosting water generated by the evaporator above the water pan, so as to block the condensed water or defrosting water from flowing to the lower evaporator, thereby reducing the water amount of the bottom evaporator. The evaporator component with this structure can solve the problem of return air carrying water to some extent.

[0005] In theory, the more the number of intermediate water collection trays, the lower the severity of the problems described above, and the better the heat exchange performance of the evaporator. However, in practice, due to the height of the water collection tray, the effective heat exchange area of the evaporator is reduced, and the flow area of the return air is also reduced, which causes the return air to flow faster through the evaporator, and the condensed water at the bottom of the evaporator is more likely to be carried away from the fin surface, thereby causing the return air to carry water and the condensed water to splash. In addition, it will also cause the structure of the evaporator to be more complex, and the cost of parts processing, production assembly, after-sales maintenance, etc. may be higher.

[0006] Therefore, there is an urgent need for a new technical solution to solve the problem of water carrying and condensed water splashing at the bottom of the high and large size evaporator.

[0007] Due to the technical problems of the existing lower air supply air conditioning unit, the condensed water at the bottom of the evaporator arranged in the upper position in the indoor unit is easy to flow with the return air and splash into the lower air duct, therefore, the utility model discloses a lower air supply air conditioning unit. Utility model content

[0008] Therefore, the technical problem to be solved by the utility model is to overcome the defects of the existing lower air supply air conditioning unit, that is, the condensed water at the bottom of the evaporator arranged in the upper position in the indoor unit is easy to flow with the return air and splash into the lower air duct, so as to provide a lower air supply air conditioning unit.

[0009] In order to solve the above problems, the utility model provides a lower air supply air conditioning unit, which comprises:

[0010] The evaporator, the water collection tray and the cyclone drum, the water collection tray is located at the lower end of the evaporator, the evaporator is surrounded by an air duct allowing airflow to flow in the inside, the water collection tray is provided with a ventilation opening below the air duct, and the cyclone drum is also arranged on the water collection tray and in the air duct, the inside of the cyclone drum has a hollow cavity, the cyclone drum cover is arranged at the upper end of the ventilation opening, so that the lower end of the hollow cavity is communicated with the ventilation opening, and the cyclone drum can introduce the gas in the air duct into the hollow cavity, so that the airflow around the evaporator enters the air duct after heat exchange of the evaporator, and the separated gas flows out downward through the ventilation opening.

[0011] In some embodiments,

[0012] The cyclone drum is a cylindrical structure, and has a side air inlet on the outer peripheral wall, so that the gas outside the cyclone drum enters the hollow cavity through the side air inlet, and moves along the inner wall of the cyclone drum in the circumferential direction for gas-liquid separation.

[0013] In some embodiments,

[0014] The inner circumferential wall of the cyclone barrel further has a side air outlet, so that the gas passing through the side air inlet enters the hollow cavity through the side air outlet, the side air inlet is opened along the tangential direction of the outer circumferential wall of the cyclone barrel, and the side air outlet is opened along the tangential direction of the inner circumferential wall of the cyclone barrel.

[0015] In some embodiments,

[0016] The cyclone barrel comprises at least two arc-shaped plates, the arc-shaped plates are arc-shaped segments projected on the bottom surface of the water pan, the arc-shaped plates are stretch structures extending in the vertical direction, at least two arc-shaped plates form an inner-outer sleeving structure in the radial direction, part of the arc-shaped segments of at least one arc-shaped plate are located on the outer periphery of part of the arc-shaped segments of at least one arc-shaped plate, part of the arc-shaped segments of at least one arc-shaped plate are located on the inner periphery of part of the arc-shaped segments of at least one arc-shaped plate, the circumferential end of the arc-shaped plate located on the outer periphery forms the side air inlet, and the circumferential end of the arc-shaped plate located on the inner periphery forms the side air outlet.

[0017] In some embodiments,

[0018] The cyclone barrel comprises a first arc-shaped plate and a second arc-shaped plate, the part of the arc-shaped segments of the first arc-shaped plate is located on the outer periphery of the part of the arc-shaped segments of the second arc-shaped plate, the part of the arc-shaped segments of the first arc-shaped plate is located on the inner periphery of the part of the arc-shaped segments of the second arc-shaped plate, the side air inlet comprises an air inlet at one circumferential end of the part of the arc-shaped segments of the first arc-shaped plate located on the outer periphery and an air inlet at one circumferential end of the part of the arc-shaped segments of the second arc-shaped plate located on the outer periphery, and the side air outlet comprises an air outlet at one circumferential end of the part of the arc-shaped segments of the first arc-shaped plate located on the inner periphery and an air outlet at one circumferential end of the part of the arc-shaped segments of the second arc-shaped plate located on the inner periphery.

[0019] In some embodiments,

[0020] The cyclone includes a first arc-shaped plate, a second arc-shaped plate, and a third arc-shaped plate. In the projection plane of the bottom surface of the water receiving tray, a portion of the arc-shaped segment of the first arc-shaped plate is located outside the outer periphery of a portion of the arc-shaped segment of the second arc-shaped plate, a portion of the arc-shaped segment of the second arc-shaped plate is located outside the outer periphery of a portion of the arc-shaped segment of the third arc-shaped plate, and a portion of the arc-shaped segment of the third arc-shaped plate is located outside the outer periphery of a portion of the arc-shaped segment of the first arc-shaped plate. The side air inlet includes an air inlet at one circumferential end of the arc-shaped segment of the first arc-shaped plate located on the outer periphery, an air inlet at one circumferential end of the arc-shaped segment of the second arc-shaped plate located on the outer periphery, and an air inlet at one circumferential end of the arc-shaped segment of the third arc-shaped plate located on the outer periphery. The side air outlet includes an air outlet at one circumferential end of the arc-shaped segment of the first arc-shaped plate located on the inner periphery, an air outlet at one circumferential end of the arc-shaped segment of the second arc-shaped plate located on the inner periphery, and an air outlet at one circumferential end of the arc-shaped segment of the third arc-shaped plate located on the inner periphery.

[0021] In some implementations...

[0022] The lower end of the cyclone is fixedly connected to the water receiving tray. Water that separates from the inner wall of the cyclone and reaches the water receiving tray can flow in the opposite direction to the airflow direction on the inner wall of the cyclone to the water receiving tray on the outer periphery of the cyclone.

[0023] In some implementations...

[0024] The vent has an inner frame that protrudes upward from its outer periphery. The vent is a ring structure, and the inner frame is also a ring structure. The lower end of the cyclone is located on the outer periphery of the inner frame and is spaced at a preset distance from the inner frame.

[0025] In some implementations...

[0026] When the cyclone is a cylindrical structure:

[0027] The vent is circular in shape, and the projection of the inner frame onto the bottom surface of the water receiving tray is circular.

[0028] Alternatively, the vent is square in shape, with a square inner frame and a square base. The square base covers the outer perimeter of the square inner frame, and the inner perimeter of the square base forms the inner frame of the water receiving tray, which is a circular structure projected onto the bottom surface of the tray.

[0029] In some implementations...

[0030] The top of the cyclone also has a top air inlet.

[0031] In some implementations...

[0032] The heating assembly is fixed on the inner wall surface of the cyclone cylinder and / or the inner frame.

[0033] In some embodiments,

[0034] The heating assembly is fixed on the inner wall surface of the cyclone cylinder and / or the inner frame.

[0035] The heating assembly is arranged in at least two rows in the vertical direction, and the at least two rows of heating assemblies are arranged in a longitudinal and transverse staggered form.

[0036] In some embodiments,

[0037] A fan is arranged below the water pan, the air inlet of the fan is opposite to the air vent, and the air outlet of the fan faces the indoor.

[0038] The lower air supply air conditioning unit has the following beneficial effects.

[0039] 1. The cyclone cylinder is arranged on the water pan, the cyclone cylinder has a hollow cavity inside, the cyclone cylinder cover is arranged at the upper end of the air vent, so that the lower end of the hollow cavity is communicated with the air vent, the cyclone cylinder can introduce the gas in the air duct into the hollow cavity, so that the airflow around the evaporator enters the air duct after heat exchange of the evaporator, and enters the interior of the cyclone cylinder for gas-liquid separation, the separated gas flows out downward through the air vent, the water (especially horizontal) carried by the air from the bottom evaporator into the air vent is prevented, and the airflow is introduced into the cyclone cylinder, gas-water separation is realized by using the centrifugal separation principle, the condensate water droplets adhere to the wall surface of the cyclone cylinder under the action of centrifugal force and flow downward to return to the water pan, so that the electrical safety of the bottom centrifugal fan part is ensured, the condensate water droplets carried by the return air are also prevented from returning to the data center room, water droplets are prevented from splashing on the bottom air duct, and the safety threat to the bottom fan is avoided; the condensate water separated by the cyclone cylinder can flow downward along the inner wall surface of the cyclone cylinder to return to the water pan at the bottom of the evaporator, and the problem that the bottom part of the evaporator in the indoor unit of the lower air supply air conditioner flows with the return air, splashes and falls into the air duct below is effectively solved.

[0040] 2.The utility model also can reach the water on the water pan through the inner wall separation of cyclone barrel and the water can flow to the water pan on the outer periphery of cyclone barrel in the direction opposite to the airflow flowing direction on the inner wall of cyclone barrel, realize the effect that the separated water is guided back to the water pan, further prevent the condensed water from entering the air vent; the utility model also through the lower end of cyclone barrel is located the outer periphery of the inner border and is spaced apart between the inner border and the inner border and interval preset distance, can effectively guarantee the water separated by the inner wall of cyclone barrel reaches the gap between cyclone barrel and inner border and is guided to the water pan through the inner wall of cyclone barrel, prevent the separated water from directly entering the air vent, further prevent the situation that the condensed water in the lower air supply air conditioner indoor unit splashes and falls into the lower air duct; the utility model also through the setting heating assembly, can make the cold wind after refrigeration through evaporator, after separating water through cyclone barrel, can be heated through heating assembly, can guarantee the temperature range required in the room, and can guarantee constant temperature and constant humidity, improve the comfort of user. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 It is the longitudinal section view (front view) of prior art lower air supply air conditioner unit;

[0042] Figure 2 It is Figure 1 The top view structure diagram of

[0043] Figure 3 Figure 1 The partial enlarged view of M part of

[0044] Figure 4 It is the longitudinal section view (front view, cyclone barrel top is top view) of the utility model lower air supply air conditioner unit;

[0045] Figure 5 It is Figure 4 The top view structure diagram of

[0046] Figure 6 It is Figure 4 The top view structure diagram of two different structures of cyclone barrel of

[0047] Figure 7 It is the brief view of evaporator of the utility model;

[0048] Figure 8 It is the improved structure diagram of water pan of the utility model.

[0049] The signs are shown as follows:

[0050] 1, evaporator; 2, water pan; 3, cyclone drum; 31, first arc-shaped plate; 32, second arc-shaped plate; 33, third arc-shaped plate; 4, air duct; 5, ventilation opening; 6, hollow cavity; 7, side air inlet; 8, inner frame; 9, side air outlet; 10, heating assembly; 11, fan; 12, overhead plate; 13, overhead layer; 14, base floor; 15, water pan inner frame; 16, square inner frame; 17, square base plate; 18, top air inlet; 100, refrigeration unit. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0052] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0053] Unless specifically stated otherwise, the relative arrangement of components and steps, numerical expressions, and numerical values set forth in the various embodiments described herein are not meant to limit the scope of the present application. At the same time, it should be understood that the sizes of the various parts shown in the drawings are not drawn in proportion. The techniques, methods and devices known to those skilled in the art can not be discussed in detail, but in appropriate cases, the techniques, methods and devices should be considered as part of the authorized description. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0054] In the description of the utility model, it needs to be understood that the orientation words such as '' front, back, up, down, left, right'', '' horizontal, vertical, perpendicular, horizontal'' and '' top, bottom '' and the like indicated orientation or positional relationship is usually based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, in the absence of the opposite statement, these orientation words do not indicate and imply that the device or element indicated must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as the limitation of the protection scope of the utility model;The orientation words '' inside, outside '' refer to the inside and outside relative to the contour of each component.

[0055] For the convenience of description, spatial relative terms such as '' above'', '' above'', '' upper surface'', '' upper '' and the like can be used here to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawing. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawing. For example, if the device in the drawing is inverted, the device described as '' above '' or '' above '' other devices or structures will be positioned '' below '' or '' below '' other devices or structures. Thus, the exemplary term '' above '' can include both '' above '' and '' below ''. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative description used here is interpreted accordingly.

[0056] In addition, it needs to be explained that the use of '' first'', '' second '' and the like to limit parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, therefore, it cannot be understood as the limitation of the protection scope of the utility model.

[0057] As Figures 4-8 As shown in the utility model provides a kind of lower air supply air conditioning unit (preferably lower air supply machine room air conditioning indoor unit), it includes:

[0058] The evaporator 1, the water pan 2 located at the lower end of the evaporator 1, the air duct 4 formed in the evaporator 1 and allowing airflow to flow through, the air vent 5 provided on the water pan 2 and below the air duct 4, and the cyclone barrel 3 provided on the water pan 2 and in the air duct 4, the cyclone barrel 3 having a hollow cavity 6 in the inside, the cyclone barrel 3 covering the upper end of the air vent 5 so that the lower end of the hollow cavity communicates with the air vent 5, and the cyclone barrel 3 being capable of introducing the gas in the air duct 4 into the hollow cavity 6 so that the airflow around the evaporator 1 enters the air duct 4 after heat exchange with the evaporator 1 and enters the inside of the cyclone barrel 3 for gas-liquid separation, and the separated gas flows out through the air vent 5.

[0059] The cyclone barrel provided on the water pan has a hollow cavity in the inside, the cyclone barrel covers the upper end of the air vent so that the lower end of the hollow cavity communicates with the air vent, the cyclone barrel is capable of introducing the gas in the air duct into the hollow cavity so that the airflow around the evaporator enters the air duct after heat exchange with the evaporator and enters the inside of the cyclone barrel for gas-liquid separation, and the separated gas flows out through the air vent, which can prevent the water in the airflow, especially from the bottom evaporator, from entering the air vent and introduce the airflow into the cyclone barrel, realize gas-water separation by using the centrifugal separation principle, and make the condensate water droplets adhere to the wall of the cyclone barrel and flow back to the water pan under the action of the centrifugal force, thereby ensuring the electrical safety of the bottom centrifugal fan component and avoiding the condensate water droplets from being carried back to the data center room by the return air, preventing the water droplets from splashing on the bottom air duct and avoiding the safety threat to the bottom fan.

[0060] In some embodiments,

[0061] The cyclone barrel 3 is in a cylindrical structure and has a side air inlet 7 on the outer peripheral wall so that the gas outside the cyclone barrel 3 enters the hollow cavity 6 through the side air inlet 7 and moves along the inner wall of the cyclone barrel 3 in a circumferential direction for gas-liquid separation.

[0062] This is the preferred structure of the cyclone barrel of the utility model, that is, through the cylindrical structure and the side air inlet opened on the outer peripheral wall, the airflow can enter the inside of the cyclone barrel through the side air inlet and flow along the inner wall of the cyclone barrel, thereby forming centrifugal separation through rotational movement to separate the water and prevent the water from splashing into the air vent and the fan below.

[0063] In some embodiments,

[0064] The inner peripheral wall of the cyclone barrel 3 further has a side air outlet 9, so that the gas entering through the side air inlet 7 enters the hollow cavity 6 through the side air outlet 9, the side air inlet 7 is opened along the tangential direction of the outer peripheral wall of the cyclone barrel 3, and the side air outlet 9 is opened along the tangential direction of the inner peripheral wall of the cyclone barrel 3.

[0065] The cyclone barrel of the utility model is further preferably provided with a side air outlet on the inner peripheral wall, so that the gas entering through the side air inlet enters the inner wall of the cyclone barrel through the side air outlet, especially the side air inlet and the side air outlet are both opened along the tangential direction, which further enables the gas flow to form wall-attached movement along the inner wall and rotational movement on the inner wall of the cyclone barrel, thereby forming centrifugal separation, effectively separating water, and preventing splashing.

[0066] In some embodiments,

[0067] The cyclone barrel 3 comprises at least two arc-shaped plates, the arc-shaped plates are projected as arc-shaped segments on the bottom surface of the water pan 2, the arc-shaped plates are stretch structures extending in the vertical direction, at least two arc-shaped plates form an inner-outer sleeving structure in the radial direction, at least one arc-shaped segment of at least one arc-shaped plate is located on the outer periphery of at least one arc-shaped segment of at least one arc-shaped plate, at least one arc-shaped segment of at least one arc-shaped plate is located on the inner periphery of at least one arc-shaped segment of at least one arc-shaped plate, the circumferential end of the arc-shaped plate located on the outer periphery forms the side air inlet 7, and the circumferential end of the arc-shaped plate located on the inner periphery forms the side air outlet 9.

[0068] This is a further preferred structure of the cyclone barrel of the utility model, and the at least two arc-shaped plates are sleeved in the radial direction, so that the gas flow enters the inner wall of the cyclone barrel along the tangential direction between the two arc-shaped plates, drives the gas flow to complete wall-attached rotational movement along the inner wall of the cyclone barrel, and achieves the effect of centrifugal separation of water.

[0069] In some embodiments,

[0070] The cyclone barrel 3 comprises a first arc plate 31 and a second arc plate 32, in the projection plane on the bottom surface of the water collecting tray 2, the partial arc segment of the first arc plate 31 is located at the outer periphery of the partial arc segment of the second arc plate 32, the partial arc segment of the first arc plate 31 is located at the inner periphery of the partial arc segment of the second arc plate 32, the side air inlet 7 comprises an air inlet located at the circumferential one end of the partial arc segment of the first arc plate 31 at the outer periphery and an air inlet located at the circumferential one end of the partial arc segment of the second arc plate 32 at the outer periphery, and the side air outlet 9 comprises an air outlet located at the circumferential one end of the partial arc segment of the first arc plate 31 at the inner periphery and an air outlet located at the circumferential one end of the partial arc segment of the second arc plate 32 at the inner periphery.

[0071] This is the first preferred structure of the cyclone barrel of the utility model, that is, comprising two arc plates, the two arc plates form the side air inlets at the circumferential ends at the outer periphery and form the side air outlets at the circumferential ends at the inner periphery, so that air inlets can be realized at two places, the air inlet amount of the cyclone barrel is effectively increased, and the water can flow along the inner wall of the cyclone barrel and complete the centrifugal separation effect.

[0072] In some embodiments,

[0073] The cyclone barrel 3 comprises a first arc plate 31, a second arc plate 32 and a third arc plate 33, in the projection plane on the bottom surface of the water collecting tray 2, the partial arc segment of the first arc plate 31 is located at the outer periphery of the partial arc segment of the second arc plate 32, the partial arc segment of the second arc plate 32 is located at the outer periphery of the partial arc segment of the third arc plate 33, the partial arc segment of the third arc plate 33 is located at the outer periphery of the partial arc segment of the first arc plate 31, the side air inlet 7 comprises an air inlet located at the circumferential one end of the partial arc segment of the first arc plate 31 at the outer periphery, an air inlet located at the circumferential one end of the partial arc segment of the second arc plate 32 at the outer periphery and an air inlet located at the circumferential one end of the partial arc segment of the third arc plate 33 at the outer periphery, and the side air outlet 9 comprises an air outlet located at the circumferential one end of the partial arc segment of the first arc plate 31 at the inner periphery, an air outlet located at the circumferential one end of the partial arc segment of the second arc plate 32 at the inner periphery and an air outlet located at the circumferential one end of the partial arc segment of the third arc plate 33 at the inner periphery.

[0074] This is the second preferred structure of the cyclone barrel of the utility model, that is, comprising three arc plates, the three arc plates form the side air inlets at the circumferential ends at the outer periphery and form the side air outlets at the circumferential ends at the inner periphery, so that air inlets can be realized at three places, the air inlet amount of the cyclone barrel is effectively increased, and the water can flow along the inner wall of the cyclone barrel and complete the centrifugal separation effect.

[0075] In some embodiments,

[0076] The lower end of the cyclone barrel 3 is fixed to the water pan 2, and water separated from the inner wall of the cyclone barrel 3 and reaching the water pan 2 can flow onto the water pan 2 along the outer periphery of the cyclone barrel 3 in a direction opposite to the direction of airflow on the inner wall of the cyclone barrel 3.

[0077] The lower end of the cyclone barrel 3 is fixed to the water pan 2, and water separated from the inner wall of the cyclone barrel 3 and reaching the water pan 2 can flow onto the water pan 2 along the outer periphery of the cyclone barrel 3 in a direction opposite to the direction of airflow on the inner wall of the cyclone barrel 3.

[0078] In some embodiments,

[0079] The outer periphery of the ventilation opening 5 is provided with an inner frame 8 protruding upward, the ventilation opening 5 is of an annular structure, the inner frame 8 is also of an annular structure, and the lower end of the cyclone barrel 3 is located at the outer periphery of the inner frame 8 and is spaced apart from the inner frame 8 by a preset distance.

[0080] The lower end of the cyclone barrel 3 is fixed to the water pan 2, and water separated from the inner wall of the cyclone barrel 3 and reaching the water pan 2 can flow onto the water pan 2 along the outer periphery of the cyclone barrel 3 in a direction opposite to the direction of airflow on the inner wall of the cyclone barrel 3.

[0081] In some embodiments,

[0082] When the cyclone barrel 3 is of a cylindrical structure:

[0083] The ventilation opening 5 is circular in shape, and the projection of the inner frame 8 on the bottom surface of the water pan 2 is of a circular structure.

[0084] Alternatively, the ventilation opening 5 is square in shape and has a square inner frame 16, and further includes a square bottom plate 17, the square bottom plate 17 is covered on the outer periphery of the square inner frame 16, and the inner periphery of the square bottom plate 17 forms the inner frame 8 whose projection on the bottom surface of the water pan 2 is of a circular structure.

[0085] This is the structure form of two water pans and inner frames of the utility model, when the ventilation opening of the water pan is circular, the inner frame is the center of the outer periphery of the circular ventilation opening, at this time, only need to set the cyclone barrel of the cylinder on the outer periphery of the circular inner frame, can complete centrifugal separation and the effect of preventing water from entering the ventilation opening of the inner periphery of the inner frame, when the ventilation opening is square, at this time, the structure of square base plate is adopted, the square inner frame of the square base plate is covered on the outer periphery of the square inner frame of the square base plate, and the square inner frame is provided on the square base plate, so as to be matched with the cyclone barrel of the cylinder, so as to complete the structure matched with the cyclone barrel of the cylinder, ensure that the gas-water mixture enters the inside of the cyclone barrel and is separated, and prevent it from falling into the ventilation opening through the circular inner frame.

[0086] In some embodiments,

[0087] The top of the cyclone barrel 3 also has a top air inlet 18.

[0088] The utility model discloses still through the top air inlet of cyclone barrel top, can further increase the air intake of cyclone barrel, improve the effect of water separation, and improve the refrigeration effect.

[0089] The utility model discloses a square inner side frame of original unit water pan is changed into circular inner side frame, and the cylindrical cyclone barrel is connected on the circular inner side frame of water pan, at least 2 vertical air inlets are arranged on the side of cyclone barrel, the bottom of cyclone barrel is open, and the top of cyclone barrel can also be designed as open for increasing return air flow area, and the electric heating assembly is vertically fixed and arranged in the inside of cyclone barrel, and return air is heated by electric heating assembly, the top air inlet of cyclone barrel is mainly used for the circulation of waterless return air in the upper portion of evaporator, and the vertical spiral air inlet of side is mainly used for the circulation of water return air in the lower portion of evaporator, realizes gas water separation by centrifugal separation principle, and condensate water droplet adheres to the wall of cyclone barrel and flows down and returns water pan under the action of centrifugal force, thereby guaranteeing the electrical safety of bottom centrifugal fan part, and condensate water droplet can also be avoided and carried back to data center room by return air.

[0090] In some embodiments,

[0091] The heating assembly 10 is also arranged in the cyclone barrel 3 and / or the inner frame 8.

[0092] The utility model discloses still through setting heating assembly, after the cold air of refrigeration after evaporator, after separating water by cyclone barrel, can be heated by heating assembly, can guarantee the temperature range required in room, and can guarantee constant temperature and humidity, improve the comfort of user.

[0093] In some embodiments,

[0094] The heating assembly 10 is fixed to the inner wall of the cyclone barrel 3 and / or the inner wall of the inner frame 8, and at least two rows of the heating assembly 10 are arranged in the vertical direction and arranged in a longitudinal and transverse staggered form.

[0095] The heating assembly can be preferably fixed to the inner wall of the cyclone barrel, and can also be preferably fixed to the inner frame; the heating assembly is further preferably arranged in a longitudinal and transverse staggered multi-row structure in the vertical direction, so that the contact area with the airflow can be increased, and the heat exchange performance and efficiency can be improved.

[0096] The utility model discloses change the square inner side frame of original unit water pan to be the circular inner side frame, and the circular inner side frame is sleeved with the columnar cyclone barrel, and the side of cyclone barrel is provided with at least 2 vertical air inlets, and the bottom of cyclone barrel is open, and the top of cyclone barrel can also be designed as open for increasing the return air flow area, and the electric heating assembly is vertically fixed and arranged in the inside of cyclone barrel, and the return air is heated through the electric heating assembly.

[0097] Beneficial effect: the spiral channel of the side air inlet is used to implement the centrifugal separation of air and water of the bottom air, and the condensate water droplets flowing with the wind adhere to the wall of the cyclone barrel under the action of centrifugal force and flow downward to return to the bottom water pan, so that the water droplets are prevented from splashing on the bottom air duct and the safety threat to the bottom centrifugal fan is avoided; the air inlet of the top of the cyclone barrel is mainly used for the return air of the upper part of the evaporator to enter, so that the water-carrying problem of the return air is not considered, and the spiral air inlet of the side is mainly used for the flow of the lower water-carrying return air, so that the spiral air duct is used to realize the air-water separation effect. The cyclone barrel is simple in structure and easy to process, low in cost, and can also be used for fixing the electric heating assembly, so that the fixing structure and cost are reduced, the heat emitted by the electric heating assembly is gathered in the inside of the cyclone barrel for heat treatment of the return air, and the heat efficiency of the electric heating assembly is improved.

[0098] In some embodiments,

[0099] The water pan 2 is provided below the fan 11, the air inlet of the fan 11 is opposite to the air vent 5, and the air outlet of the fan 11 faces the indoor.

[0100] The utility model further sets the fan below the water pan, and the air inlet of the fan is opposite to and communicates with the air vent, so that the airflow after heat exchange of the evaporator can be exhausted, and the airflow after suction of the fan is blown to the indoor through the air outlet, so that the refrigeration and heating effects on the indoor are ensured.

[0101] As Figure 1 And Figure 2As shown, the existing bottom air supply refrigeration unit structure includes a whole frame, a centrifugal fan and an evaporator arranged in the frame, wherein the evaporator is arranged at the upper part of the frame and the centrifugal fan is arranged at the bottom of the frame; the bottom end of the centrifugal fan part is fixed on the bottom plate of the frame of the refrigeration unit when it leaves the factory, and when it is installed on site in the data center, the fixing device is removed and the centrifugal fan part is moved downward into the overhead layer, and the upper end of the centrifugal fan part is fixed on the bottom plate of the frame again; when the centrifugal fan operates, the return air passes through the fin gap of the evaporator from the outside of the refrigeration unit, converges to the center and flows downward through the bottom of the refrigeration unit into the centrifugal fan, under the action of the centrifugal fan, the return air enters the overhead layer, and then flows upward from the air supply hole of the overhead layer into the data center room to cool the heat generating equipment of the data center, and the heated return air passes through the evaporator fins again from the outside of the refrigeration unit, forming a complete return air circulation.

[0102] The bottom of the evaporator is provided with a water pan, and the water pan has a certain height distance with the bottom plate of the whole frame. The space between the water pan and the bottom plate of the whole frame is mainly used to accommodate the centrifugal fan part when it leaves the factory. The water pan is horizontally fixed on the whole frame as a support installation structure of the evaporator. The water pan receives the low-temperature condensate water generated during refrigeration of the evaporator and removes it through the drain pipe. The middle position of the water pan is hollow and has an inner frame arranged upward. The adjacent parts of the inner frames of each water pan are welded and sealed to prevent condensate water from leaking downward from the middle flow hole to the centrifugal fan part below. The hollow structure formed by the inner frame of the water pan serves as a flow hole for return air to enter the lower part of the unit from the upper part of the unit. When the refrigeration unit is working, the return air passes through the fin gap of the evaporator under the suction action of the centrifugal fan. After air heat exchange and refrigeration, it enters the centrifugal fan from top to bottom. The water vapor in the return air condenses into water droplets on the evaporator. The condensate water flows downward to the water pan and is discharged through the drain pipe on the water pan. The condensate water of the evaporator flows downward along the surface of the heat exchange fins under the action of gravity and converges to the water pan at the bottom of the evaporator. Therefore, the more condensate water converges in the evaporator heat exchange area close to the bottom water pan, and even in the fin gap of the evaporator heat exchange area at the bottom, the condensate water is filled, making it difficult for the return air to pass through the fin gap filled with condensate water, thereby affecting the heat exchange effect of this area. In addition, when the fin gap at the bottom area is filled with discontinuous condensate water, the flowable gap in the fin gap becomes smaller, thereby increasing the speed of the passing return air. At the same time, under the suction action of the centrifugal fan, the amount of return air close to the bottom of the evaporator of the centrifugal fan is greater than that at the upper part of the evaporator. After the superposition of the two factors, the condensate water in the fin gap at the bottom of the evaporator may be carried away from the fin surface, and part of the condensate water flows with the return air and splashes. This situation is more obvious under the working conditions of high temperature and humidity of the return air and large cooling capacity and air volume (refer to Figure 3 andFigure 7 This case of return air belt water is more obvious in high temperature and humid return air and large cooling capacity and large air volume operation condition: the dew point temperature of high temperature and humid return air is relatively high, and the return air is easy to condense water droplets on the evaporator; the evaporating temperature is usually low when the refrigeration unit outputs large cooling capacity, which causes the return air to be more prone to condensation; the face velocity of the evaporator is larger under large air volume conditions, and the wind speed between the fins is also larger, so it is easier to blow away the condensate water droplets on the fin surface, thereby more easily causing the return air to carry water.

[0103] The space between the water pan and the bottom plate of the refrigeration unit is used to accommodate the fixed centrifugal fan components when leaving the factory; the drawings provided by the technical solution are schematic diagrams, not complete and true refrigeration unit product design drawings, and are used to understand the technical solution.

[0104] As shown in Figures 4 to 6 , the scheme of the utility model improves the design of the above-mentioned refrigeration unit: the original water pan square inner frame is changed to a circular inner frame (see Figure 5 ), and this scheme is suitable for improving the structure of the water pan before the unit and parts are produced.

[0105] Alternatively, as shown in Figure 8 , the outer side of the circular inner frame has a square bottom plate which cooperates with the original water pan square inner frame, the square bottom plate of the outer side of the circular inner frame is sleeved on the original water pan square inner frame, and the former wraps the latter (i.e. the square inner dimension of the former is greater than or equal to the square outer dimension of the latter), and this improved scheme of sleeving does not need to change the structure of the original water pan of the unit, and is simple, convenient and easy to implement, and this technical solution is suitable for improving the structure of the existing old unit; the circular inner frame and the square bottom plate can be integrally formed, or can be separately processed and formed by welding to realize the overall structure (the circular hole in the middle of the circular inner frame and the square bottom plate is cooperated and welded to be fixed and sealed).

[0106] Further, a cylindrical cyclone cylinder is sleeved on the circular inner frame, and the circular inner frame is completely inserted into the inside of the cyclone cylinder, so that the cyclone cylinder is arranged above the water pan or the square bottom plate.

[0107] Further, the horizontal projection view of the cyclone cylinder is as shown in Figure 6 , the cyclone cylinder comprises at least two side air inlets, the plurality of air inlets are arranged in an annular uniform array type about the vertical central axis of the column, and each side air inlet corresponds to an air outlet inside the cyclone cylinder, and the plurality of air outlets are also arranged in an annular uniform array type about the vertical central axis of the column.

[0108] Further, the cyclone cylinder is combined in a uniform annular array manner by a plurality of spiral arc-shaped structures (referred to as spiral plates) around the same vertical central axis; further, the cyclone cylinder bottom is fixed on the water pan or the square bottom disc, and can adopt but is not limited to welding, rivet, screw bolt, clamping and the like fixing modes.

[0109] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement and the like within the spirit and principle of the present application shall be included in the protection scope of the present application. The above merely describes preferred embodiments of the present application, and it should be pointed out that, for ordinary skilled in the art, on the premise of not departing from the technical principle of the present application, a plurality of improvements and modifications can be made, and these improvements and modifications shall be regarded as the protection scope of the present application.

Claims

1. A down-blowing air conditioning unit characterized by: It comprises: an evaporator (1), a water pan (2) and a cyclone barrel (3), the water pan (2) is located at the lower end of the evaporator (1), the evaporator (1) forms an air duct (4) allowing airflow to flow in its interior, the water pan (2) is provided with a ventilation opening (5) below the air duct (4), the cyclone barrel (3) is also provided on the water pan (2) and in the air duct (4), the interior of the cyclone barrel (3) has a hollow cavity (6), the cyclone barrel (3) covers the upper end of the ventilation opening (5), so that the lower end of the hollow cavity communicates with the ventilation opening (5), the cyclone barrel (3) can introduce the gas in the air duct (4) into the hollow cavity (6), so that the airflow around the evaporator (1) enters the air duct (4) after heat exchange with the evaporator (1), and enters the cyclone barrel (3) for gas-liquid separation, and the separated gas flows out downward through the ventilation opening (5).

2. The lower air supply air conditioning unit according to claim 1, characterized in that: the cyclone barrel (3) is a cylindrical structure, and has a side air inlet (7) on the outer peripheral wall, so that the gas outside the cyclone barrel (3) enters the hollow cavity (6) through the side air inlet (7) and moves along the circumferential direction of the inner wall of the cyclone barrel (3) for gas-liquid separation.

3. The lower air supply air conditioning unit according to claim 2, characterized in that: the inner peripheral wall of the cyclone barrel (3) also has a side air outlet (9), so that the gas passing through the side air inlet (7) enters the hollow cavity (6) through the side air outlet (9), the side air inlet (7) is opened along the tangent direction of the outer peripheral wall of the cyclone barrel (3), and the side air outlet (9) is opened along the tangent direction of the inner peripheral wall of the cyclone barrel (3).

4. The lower air supply air conditioning unit according to claim 3, characterized in that: the cyclone barrel (3) comprises at least two arc-shaped plates, the arc-shaped plates project as arc-shaped segments on the bottom surface of the water pan (2), the arc-shaped plates are stretch structures with the arc-shaped segments extending in the vertical direction, and at least two arc-shaped plates form an inner-outer sleeving structure in the radial direction, wherein part of the arc-shaped segments of at least one arc-shaped plate are located at the outer periphery of part of the arc-shaped segments of at least one arc-shaped plate, part of the arc-shaped segments of at least one arc-shaped plate are located at the inner periphery of part of the arc-shaped segments of at least one arc-shaped plate, the circumferential end of the arc-shaped plate located at the outer periphery forms the side air inlet (7), and the circumferential end of the arc-shaped plate located at the inner periphery forms the side air outlet (9).

5. The lower air supply air conditioning unit according to claim 4, characterized in that: The cyclone cylinder (3) comprises a first arc plate (31) and a second arc plate (32), in the projection plane on the bottom surface of the water pan (2), the partial arc segment of the first arc plate (31) is located at the outer periphery of the partial arc segment of the second arc plate (32), the partial arc segment of the first arc plate (31) is located at the inner periphery of the partial arc segment of the second arc plate (32), the side air inlet (7) comprises an air inlet located at the circumferential one end of the partial arc segment of the first arc plate (31) at the outer periphery, and an air inlet located at the circumferential one end of the partial arc segment of the second arc plate (32) at the outer periphery, and the side air outlet (9) comprises an air outlet located at the circumferential one end of the partial arc segment of the first arc plate (31) at the inner periphery, and an air outlet located at the circumferential one end of the partial arc segment of the second arc plate (32) at the inner periphery.

6. The lower air supply air conditioning unit according to claim 4, wherein: The cyclone cylinder (3) comprises a first arc plate (31), a second arc plate (32) and a third arc plate (33), in the projection plane on the bottom surface of the water pan (2), the partial arc segment of the first arc plate (31) is located at the outer periphery of the partial arc segment of the second arc plate (32), the partial arc segment of the second arc plate (32) is located at the outer periphery of the partial arc segment of the third arc plate (33), the partial arc segment of the third arc plate (33) is located at the outer periphery of the partial arc segment of the first arc plate (31), the side air inlet (7) comprises an air inlet located at the circumferential one end of the partial arc segment of the first arc plate (31) at the outer periphery, an air inlet located at the circumferential one end of the partial arc segment of the second arc plate (32) at the outer periphery, and an air inlet located at the circumferential one end of the partial arc segment of the third arc plate (33) at the outer periphery, and the side air outlet (9) comprises an air outlet located at the circumferential one end of the partial arc segment of the first arc plate (31) at the inner periphery, an air outlet located at the circumferential one end of the partial arc segment of the second arc plate (32) at the inner periphery, and an air outlet located at the circumferential one end of the partial arc segment of the third arc plate (33) at the inner periphery.

7. The lower air supply air conditioning unit according to claim 2, wherein: The lower end of the cyclone cylinder (3) is fixedly connected with the water pan (2), and water separated from the inner wall of the cyclone cylinder (3) and reaching the water pan (2) can flow to the water pan (2) at the outer periphery of the cyclone cylinder (3) in a direction opposite to the direction of air flow on the inner wall of the cyclone cylinder (3).

8. The lower air supply air conditioning unit according to any one of claims 1-7, wherein: The outer periphery of the air vent (5) is provided with an inner frame (8) protruding upward, the air vent (5) is in a ring structure, the inner frame (8) is also in a ring structure, and the lower end of the cyclone cylinder (3) is located at the outer periphery of the inner frame (8) and spaced apart from the inner frame (8) by a predetermined distance.

9. The lower air supply air conditioning unit according to claim 8, wherein: When the cyclone cylinder (3) is a cylindrical structure: The shape of the air vent (5) is circular, and the projection of the inner frame (8) on the bottom surface of the water pan (2) is a circular structure. Alternatively, the shape of the air vent (5) is square, and there is a square inner frame (16). A square base plate (17) is further provided, which covers the outer periphery of the square inner frame (16), and the inner periphery of the square base plate (17) forms the inner frame (8) which is a circular structure when projected on the bottom surface of the water pan (2).

10. The lower air supply air conditioning unit according to claim 1, wherein: The top of the cyclone cylinder (3) further has a top air inlet (18).

11. The lower air supply air conditioning unit according to claim 8, wherein: A heating assembly (10) is further provided in the cyclone cylinder (3) and / or in the inner frame (8).

12. The lower air supply air conditioning unit according to claim 11, wherein: The heating assembly (10) is fixed to the inner wall surface of the cyclone cylinder (3), and / or the heating assembly (10) is fixed to the inner wall surface of the inner frame (8); The heating assembly (10) is arranged in at least two rows in the vertical direction, and the at least two rows of heating assemblies (10) are arranged in a longitudinal and transverse staggered form.

13. The lower air supply air conditioning unit according to claim 1, wherein: A fan (11) is provided below the water pan (2), the air inlet of the fan (11) is opposite to the air vent (5), and the air outlet of the fan (11) faces the indoor.

Images