Fin type heat exchanger water blowing prevention structure and fresh air conditioning unit

Abstract

The utility model relates to a water blowing prevention structure of a finned heat exchanger and a fresh air conditioning unit. The utility model relates to a water blowing prevention structure of a finned heat exchanger. The water blowing prevention structure comprises the finned heat exchanger, a water pan and a water retaining strip, the water pan is arranged at the bottom of the finned heat exchanger; a cavity is formed between the bottom of the air outlet face of the finned heat exchanger and the side face, close to the air outlet face of the finned heat exchanger, of the water pan. And the water retaining strip is arranged in the cavity. The water retaining strip made of the EPP material is arranged in the gap between the water pan and the finned heat exchanger, so that negative pressure airflow is prevented from passing through, and the water blowing problem caused by condensate water brought out by the airflow due to large negative pressure at the bottom of the finned heat exchanger is well solved. The water baffle is arranged on the flanged plate on the water pan, through the inclined design of the inclined plate of the water baffle, the blocking and collecting distance is increased, water drops can conveniently flow into the water pan, and the risk that condensate water is taken out secondarily is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to a fin type heat exchanger anti-blow water structure and a fresh air air conditioning unit. Background Art

[0002] In the structural design of traditional fresh air air conditioning units, due to the strict limitations of the external dimensions of the fresh air air conditioning units and the complexity of their internal structures, the distance between the fan and the finned heat exchanger is too close. This compact design allows the fan to run at high speed. According to the flow direction of the wind through the finned heat exchanger, the condensed water formed on the fins of the finned heat exchanger flows downward due to gravity when the wind passes through the finned heat exchanger. Condensed water will accumulate between the bottom of the finned heat exchanger and the water tray. The high wind pressure here can easily blow out the condensed water in the water tray that has not been discharged in time, causing the condensed water to be blown to other components inside the unit or sucked into the fan; which in turn causes the condensed water to accumulate inside the unit. In severe cases, this may cause the unit to leak or damage the internal electronic control components, resulting in reduced unit reliability.

[0003] In addition, the existing methods to solve the problem of condensed water generated by the finned heat exchanger being sucked into the fan or blown into the unit are usually to reduce the running wind speed of the fan or increase the distance between the finned heat exchanger and the fan to prevent the condensed water from being sucked into the fan or blown into the unit; or to use a fan or internal unit components with higher waterproof performance requirements. However, these methods will increase the cost of the unit and affect the overall economic benefits. Utility Model Content

[0004] Based on this, the purpose of the utility model is to provide a finned heat exchanger anti-blow water structure, which can solve the blow water problem caused by condensed water being brought out between the bottom of the finned heat exchanger and the water receiving tray due to high wind pressure.

[0005] A fin heat exchanger anti-blow water structure comprises a fin heat exchanger, a water receiving tray, and a water retaining strip; the water receiving tray is arranged at the bottom of the fin heat exchanger; a cavity is formed between the bottom of the air outlet surface of the fin heat exchanger and the side surface of the water receiving tray close to the air outlet surface of the fin heat exchanger; the water retaining strip is arranged in the cavity.

[0006] The anti-blow water structure of the finned heat exchanger described in the utility model is based on the airflow direction when the wind passes through the finned heat exchanger, and considering that the negative pressure formed at the position between the bottom of the finned heat exchanger and the water receiving pan is the largest, when the wind passes through the finned heat exchanger, the condensed water formed on the fins of the finned heat exchanger flows downward due to gravity, and there will be condensed water accumulation at the position between the bottom of the finned heat exchanger and the water receiving pan, but the negative pressure here is the largest, and it is easy to blow out the condensed water in the water receiving pan that has not been discharged in time. Therefore, the utility model sets the water retaining strip between the bottom of the air outlet surface of the finned heat exchanger and the side of the water receiving pan, wherein the air outlet surface of the finned heat exchanger refers to the side of the fin on the side of the finned heat exchanger when the wind passes through the finned heat exchanger; the water retaining strip can prevent the condensed water that has not been discharged in the water receiving pan from being blown out, thereby solving the problem of blowing water between the bottom of the finned heat exchanger and the water receiving pan.

[0007] As a preferred embodiment of the above scheme, the water receiving pan is provided with a water receiving trough; the bottom of the fin-type heat exchanger is arranged in the water receiving trough; the cavity is formed between the bottom of the air outlet surface of the fin-type heat exchanger and the side of the water receiving trough; the water retaining bar is embedded in the cavity and arranged on the bottom surface of the water receiving trough; the water retaining bar is in contact with the side surface and / or the bottom surface of the water receiving trough; the water receiving pan is also provided with a drain outlet connected to the water receiving trough. The utility model arranges the bottom of the fin heat exchanger in the water receiving groove of the water receiving pan, so that the condensed water generated by the fin heat exchanger can fall into the water receiving groove and be discharged from the drain port; the utility model embeds the water retaining strip in the cavity between the bottom of the air outlet surface of the fin heat exchanger and the side of the water receiving groove, and makes the water retaining strip contact with the side of the water receiving groove and / or the bottom of the water receiving groove, so that the water retaining strip blocks the airflow here, thereby greatly reducing the risk of condensed water that is not discharged in time being blown out.

[0008] As a preferred solution of the above scheme, the water retaining strip is made of foamed PP material (i.e. EPP material). EPP material has the characteristics of light weight, good elasticity, shock and pressure resistance, high deformation recovery rate, and no water absorption. Using foamed PP material as the material of the water retaining strip can better prevent condensed water from being blown out.

[0009] As a preferred solution of the above scheme, the side of the water retaining strip that contacts the bottom of the air outlet surface of the fin heat exchanger is recorded as the first side of the water retaining strip, and a water retaining strip chamfer is provided between the first side of the water retaining strip and the top surface of the water retaining strip, and a water retaining strip inclined surface is formed between the first side of the water retaining strip and the top surface of the water retaining strip. The utility model forms a water retaining strip inclined surface by providing a chamfer on the contact surface of the water retaining strip that contacts the fin heat exchanger, i.e., the first side of the water retaining strip and the top surface of the water retaining strip. If condensed water is blown out from the water retaining strip, it can flow back to the water receiving groove of the water receiving tray along the inclined surface of the water retaining strip, which greatly improves the risk of condensed water being blown out to other components due to the accumulation of condensed water at the bottom of the fin heat exchanger and the inability of the water retaining strip to blow out the condensed water.

[0010] As a preferred embodiment of the above scheme, the angle between the inclined surface of the water retaining strip and the air outlet surface of the finned heat exchanger is an acute angle. This arrangement can better allow the condensed water to flow back to the water receiving groove of the water receiving tray along the inclined surface of the water retaining strip.

[0011] As a preferred embodiment of the above scheme, the anti-blow water structure of the fin-type heat exchanger also includes a water baffle; a folding plate is provided on the top of the water receiving tray, and the folding plate forms an angle with the top of the side wall of the water receiving trough, and the folding plate extends in the direction away from the fin-type heat exchanger; the water baffle is provided on the folding plate. The utility model takes into account the water retaining strip design of the above scheme, which blocks the airflow from carrying out condensed water, but because of the deviation when the workers assemble or install the water retaining strip, or the condensed water blown out to the inclined surface of the water retaining strip does not flow back to the water receiving trough of the water receiving tray in time, it may cause a very small amount of condensed water to be carried out and carried out to the folding plate of the water receiving tray; therefore, the utility model can provide the water baffle on the folding plate at the top of the water receiving tray, so as to provide a secondary blockage for the condensed water that is not blocked by the water retaining strip and is blown out, so that the condensed water flows back to the water receiving trough of the water receiving tray.

[0012] As a preferred embodiment of the above scheme, the water baffle includes a bottom plate, an inclined plate, and two end plates; the bottom plate is fixedly arranged on the folding plate, the inclined plate is fixedly arranged on the side of the bottom plate away from the fin heat exchanger, and is inclined upwardly arranged toward the side away from the fin heat exchanger; the two end plates are respectively arranged at the two ends of the bottom plate and the inclined plate, and each end plate is respectively connected to the same end of the bottom plate and the inclined plate; the bottom plate, the inclined plate and the two end plates are enclosed to form a water baffle trough; the height of the water baffle in the vertical direction is 15-40mm. The water baffle described in the utility model, through the inclined design of the inclined plate, enables the condensed water to flow down from the inclined plate under the interception effect of the inclined plate through the action of gravity and gather on the bottom plate, that is, gather in the water baffle trough, and perform secondary blocking on the blown condensed water. When a certain amount of water is accumulated, it will flow back to the water receiving trough of the water receiving tray. The water baffle is set to have a vertical height of 15-40 mm. If the height is too low, the splash-proof effect cannot be achieved. If the height is too high, the heat exchange effect of the finned heat exchanger will be affected.

[0013] As a preferred embodiment of the above scheme, the inclined plate has an inclination angle of 60°. The inclined plate of the water retaining plate is designed with an inclination angle of 60°, which facilitates the condensed water to flow down.

[0014] As a preferred solution of the above solution, the water baffle is fixed to the folding plate by screws. The water baffle is fixed to the folding plate on the top of the water receiving tray by screws so as to be firm and not loose.

[0015] A fresh air air conditioning unit, comprising any of the above-mentioned finned heat exchanger anti-blow water structures. The fresh air air conditioning unit adopting the above-mentioned finned heat exchanger anti-blow water structure can avoid the problem of blowing water caused by the condensed water between the bottom of the finned heat exchanger and the water receiving tray being brought out due to the high wind pressure generated when the fan is too close to the finned heat exchanger or when the fan is running at high speed.

[0016] The technical effects of the finned heat exchanger anti-blow water structure and the fresh air air conditioning unit of the utility model are as follows:

[0017] By using an EPP water retaining strip in the gap between the water receiving tray and the finned heat exchanger to prevent the passage of negative pressure airflow, the problem of water blowing caused by condensed water brought out by the airflow due to the high negative pressure at the bottom of the finned heat exchanger is well solved.

[0018] A water baffle is arranged on the folding plate on the water receiving tray. The inclined design of the inclined plate of the water baffle increases the blocking and collecting distance and facilitates the water droplets to flow into the water receiving tray, thereby reducing the risk of condensed water being carried out for a second time.

[0019] Through the above-mentioned structural design scheme, the problem of water blowing between the bottom of the finned heat exchanger and the water receiving tray when the distance between the finned heat exchanger and the fan is close or the wind speed of the fan is high is solved by relatively simple means; and the structure of the utility model is simple to install, and the reliability of product use is increased at low cost, which brings a better experience to users without increasing costs.

[0020] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the internal structure of a fresh air air conditioning unit according to an embodiment of the utility model;

[0022] Figure 2 for Figure 1 The main view of

[0023] Figure 3 A schematic diagram of a fin-type heat exchanger anti-blow water structure according to an embodiment of the utility model;

[0024] Figure 4 for Figure 3 A top view of

[0025] Figure 5 for Figure 4 Schematic diagram of the cross section of AA;

[0026] Figure 6 for Figure 5 The enlarged schematic diagram of point B in the middle;

[0027] Figure 7 for Figure 6 Schematic diagram of the positions of the central water tray, water retaining strip and water retaining plate;

[0028] Figure 8 It is a schematic diagram of the structure of the water retaining bar;

[0029] Fig. 9 This is a schematic diagram of the structure of the water retaining plate.

[0030] Figure 1-Figure 9 Middle: shell 10; fresh air inlet 11; fresh air outlet 12; first heat exchanger 20; finned heat exchanger anti-blow water structure 30; finned heat exchanger 31; water receiving tray 32; water receiving trough 321; drain outlet 322; folding plate 323; drain outlet 323; drain trough 324; water retaining bar 33; first water retaining side 331; top surface 332 of water retaining bar; inclined surface 333 of water retaining bar; second water retaining side 334 of water retaining bar; bottom surface 335 of water retaining bar; water retaining plate 34; bottom plate 341; inclined plate 342; end plate 343; fan 40. DETAILED DESCRIPTION

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms first, second, third, etc. in the specification and claims are only used for the purpose of describing the same technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated, nor necessarily describing the order or time sequence. The terms are interchangeable where appropriate. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0033] Similarly, the term "connection" is also used in the specification and claims, which should not be interpreted as limited to direct connection. Therefore, the expression "device A is connected to device B" should not be limited to the device A being directly connected to device B in the device or system, which means that there is a path between device A and device B, which may be a path including other devices or tools.

[0034] This embodiment provides a fresh air air conditioning unit and a fin-type heat exchanger anti-blow water structure.

[0035] Please read first Figure 1 and Figure 2 The fresh air air conditioning unit includes a housing 10 and a fresh air system. The fresh air system includes a fresh air inlet 11 and a fresh air outlet 12 arranged on the housing, and an air supply channel between the fresh air inlet 11 and the fresh air outlet 12; a first heat exchanger 20, a second heat exchanger, and a fan 40 are arranged in the air supply channel; the fan 40 is arranged near the air outlet surface of the second heat exchanger. The second heat exchanger adopts a fin-type heat exchanger anti-blow water structure 30 of this embodiment. Figure 2 In the direction of the arrow shown, under the action of the fan 40, fresh air is sucked in from the fresh air inlet 11, dehumidified under the regulation of the first heat exchanger 20 and the second heat exchanger in turn, and is sucked in by the fan 40 and blown toward the fresh air outlet 12, and enters the room from the fresh air outlet 12.

[0036] The focus of the fresh air air-conditioning unit of this embodiment is on the anti-blow water structure 30 of the fin-type heat exchanger of this embodiment. Those skilled in the art should know that in addition to some structures listed in the fresh air air-conditioning unit of this embodiment, it also has other structures, such as the return air system, which are all structures well known to those skilled in the art and will not be described in detail here.

[0037] The fin heat exchanger anti-blow water structure 30 of this embodiment is shown in FIG. Figure 3-6 , including a finned heat exchanger 31, a water receiving pan 32, and a water retaining strip 33; the water receiving pan 32 is arranged at the bottom of the finned heat exchanger 31; the water retaining strip 33 is arranged between the bottom of the air outlet surface of the finned heat exchanger 31 and the water receiving pan 32. Specifically, a cavity is formed between the bottom of the air outlet surface of the finned heat exchanger 31 and the side of the water receiving pan 32 close to the air outlet surface of the finned heat exchanger 31; the water retaining strip 33 is arranged in the cavity. Among them, the air outlet surface of the finned heat exchanger 31 refers to the side of the fin on the side where the wind comes out of the finned heat exchanger 31 when passing through the finned heat exchanger 31. The bottom of the air outlet surface of the finned heat exchanger 31 refers to no more than 1 / 3 of the height of the fin, and those skilled in the art can choose to set it according to actual needs.

[0038] This embodiment is based on the direction of airflow when the wind passes through the finned heat exchanger 31, and takes into account that the negative pressure formed at the position between the bottom of the finned heat exchanger 31 and the water receiving pan 32 is the largest. When the wind passes through the finned heat exchanger 31, the condensed water formed on the fins of the finned heat exchanger 31 flows downward due to gravity, and there will be condensed water accumulated at the position between the bottom of the finned heat exchanger 31 and the water receiving pan 32, but the negative pressure here is the largest, and it is easy to blow out the condensed water in the water receiving pan 32 that has not been discharged in time. Therefore, the embodiment sets a water retaining bar 33 between the bottom of the air outlet surface of the finned heat exchanger 31 and the side of the water receiving pan 32. The water retaining bar 33 can prevent the condensed water that has not been discharged from the water receiving pan 32 from being blown out, thereby solving the problem of blowing water between the bottom of the finned heat exchanger 31 and the water receiving pan 32. As a preferred solution, the water retaining bar 33 blocks the last channel flow path at the bottom position of the air outlet surface of the fin-type heat exchanger 31. Because the heat exchange effect of the last flow path is generally very poor and no heat exchange is performed, the water retaining bar 33 blocks the airflow of the last channel flow path and guides the airflow of the upper flow path.

[0039] In this example, see Figure 7 The water receiving tray 32 is provided with a water receiving groove 321 which is concave from the top; the bottom of the water receiving tray is provided with a drain port 322 which is connected with the water receiving groove. Figure 6, the bottom of the finned heat exchanger 32 is arranged in the water receiving groove 321; the cavity is formed between the bottom of the air outlet surface of the finned heat exchanger 32 and the side of the water receiving groove 32; the water retaining strip 33 is embedded in the cavity and is arranged on the bottom surface of the water receiving groove 321; in the present embodiment, the water retaining strip 33 is respectively in contact with the bottom of the air outlet surface of the finned heat exchanger 31, the side of the water receiving groove 321, and the bottom surface of the water receiving groove 321; in other embodiments, the water retaining strip 33 is respectively in contact with the bottom of the air outlet surface of the finned heat exchanger 31 and the side of the water receiving groove 321, or the water retaining strip 33 is respectively in contact with the bottom of the air outlet surface of the finned heat exchanger 31 and the bottom surface of the water receiving groove 321, so as to prevent the condensed water from being blown out. In this embodiment, the bottom of the finned heat exchanger 31 is set in the water receiving groove 321 of the water receiving tray 32, so that the condensed water generated by the finned heat exchanger 31 can fall into the water receiving groove 321 and be discharged from the drain port 322; the water retaining bar 33 is embedded in the cavity between the bottom of the air outlet surface of the finned heat exchanger 31 and the side of the water receiving groove 321, and the water retaining bar 33 is respectively in contact with the bottom of the air outlet surface of the finned heat exchanger 321, the side of the water receiving groove 321, and the bottom of the water receiving groove 321, so that the water retaining bar 33 blocks the airflow here, thereby greatly reducing the risk of condensed water that is not discharged in time being blown out. As a preferred solution, the water retaining strip 33 blocks the last channel flow path at the bottom position of the air outlet surface of the finned heat exchanger 31. Because the heat exchange effect of the last flow path is generally very poor, no heat exchange is performed. The water retaining strip 33 blocks the airflow of the last channel flow path and guides the airflow of the upper flow path, thereby preventing the condensed water in the water receiving tray 32 set at the bottom of the finned heat exchanger 31 from being blown out in time. In this embodiment, please refer to Figure 7 In order to facilitate drainage, a drainage groove 324 is further provided in the middle of the bottom surface of the water receiving groove 321 , and the drainage groove 324 is connected to the drainage port 322 .

[0040] Considering that there is condensed water accumulated at the bottom of the finned heat exchanger and the water retaining strip 33 cannot satisfy the condensed water to be blown out, a small amount of condensed water is blown out of the water retaining strip 32. Figure 6 and Figure 8, the side in contact with the bottom of the air outlet surface of the finned heat exchanger 31 is recorded as the first side 331 of the water retaining strip, and a water retaining strip chamfer is provided between the first side 331 of the water retaining strip and the top surface 332 of the water retaining strip, that is, a water retaining strip inclined surface 333 is formed between the first side 333 of the water retaining strip and the top surface 332 of the water retaining strip. If condensed water is blown out from the water retaining strip 33, the effect of the water retaining strip inclined surface 333 can inhibit the condensed water from being blown out, and the condensed water can flow back to the water receiving groove 321 of the water receiving tray 32 along the water retaining strip inclined surface 333, reducing the risk of condensed water being blown out to other components. In this embodiment, the angle between the water retaining strip inclined surface and the air outlet surface of the finned heat exchanger is an acute angle. Preferably, the angle between the inclined surface of the water retaining strip and the air outlet surface of the fin heat exchanger is 45°, the angle between the first side surface 331 of the water retaining strip and the inclined surface of the water retaining strip is 135°, and the angle between the top surface 332 of the water retaining strip and the inclined surface of the water retaining strip is 135°. The inclined surface 333 of the water retaining strip is arranged in this way, so that the condensed water can flow back to the water receiving groove 321 of the water receiving tray 32 along the inclined surface 333 of the water retaining strip. In this embodiment, please refer to Figure 8 The water retaining bar 33 is a pentagonal prism structure, and its outer side surface is the first side surface 331 of the water retaining bar, the inclined surface 333 of the water retaining bar, the top surface 332 of the water retaining bar, the second side surface 334 of the water retaining bar, and the bottom surface 335 of the water retaining bar, which are connected in sequence. The second side surface 334 of the water retaining bar is the surface of the water retaining bar 33 that contacts the side of the water receiving groove 321 of the water receiving tray 32; the bottom surface 335 of the water retaining bar is the surface of the water retaining bar 33 that contacts the bottom surface of the water receiving groove 321 of the water receiving tray 32. In this embodiment, the water retaining bar 33 is made of foamed PP material (i.e., EPP material), which can be better installed. The bottom surface 335 of the water retaining bar is glued and fixed to the bottom surface of the water receiving groove 321 and / or the second side surface 334 of the water retaining bar is glued and fixed to the side of the water receiving groove.

[0041] The present embodiment further considers the design of the water retaining strip 33 using the above-mentioned scheme, which blocks the airflow from carrying out the condensed water. However, when the workers assemble the water retaining strip 33 or install the water retaining strip 33, or when the condensed water blown out to the inclined surface 333 of the water retaining strip does not flow back to the water receiving groove 321 of the water receiving tray 32 in time, a very small amount of condensed water may be carried out and carried out outside the water receiving tray 32. The fin-type heat exchanger anti-blow water structure 30 of the present embodiment also includes a water retaining plate 34; a folding plate 323 is provided on the top of the water receiving tray 32, and the folding plate 323 forms an angle with the top of the side wall of the water receiving groove 321, and the folding plate 323 extends in a direction away from the fin-type heat exchanger 31; the water retaining plate 34 is provided on the folding plate 323. By providing a water baffle plate 34 on the folding plate 323 at the top of the water receiving tray 32 , the condensed water that is not blocked by the water baffle bar 33 and is blown out can be blocked for the second time, so that the condensed water flows back to the water receiving groove 321 of the water receiving tray 32 .

[0042] In this example, see Figure 6 and Fig. 9 The water retaining plate 34 includes a bottom plate 341, an inclined plate 342, and two end plates 343; the bottom plate 341 is fixedly arranged on the folding plate 323, the inclined plate 342 is fixedly arranged on the side of the bottom plate 341 away from the fin heat exchanger 31, and is inclined upwardly arranged toward the side away from the fin heat exchanger 31; the two end plates 343 are respectively arranged at the two ends of the bottom plate 341 and the inclined plate 342, and each end plate 343 is respectively connected to the same end of the bottom plate 341 and the inclined plate 342; the bottom plate 341, the inclined plate 342 and the two end plates 343 enclose a water retaining plate water tank. The water baffle 34 of the utility model, through the inclined design of the inclined plate 342, allows the condensed water to flow down from the inclined plate 342 by gravity under the interception effect of the inclined plate 342 and collect on the bottom plate 341, that is, collect in the water baffle tank, and the blown condensed water is blocked and collected for a second time. When a certain amount of water is accumulated, it will flow back to the water tank 31 of the water receiving tray 32. In order to facilitate the downward flow of condensed water, the inclined angle of the inclined plate is 60°. As a preferred embodiment of the above scheme, the water baffle 34 is fixed to the folding plate 323 by screws. The water baffle 34 is fixed to the folding plate 323 firmly and does not loosen.

[0043] As a preferred solution, the water retaining plate 34 has a vertical height of 15-40 mm. Specifically, the inclined plate 342 has a vertical height of 15-40 mm. If the height is too low, the splash-proof effect cannot be achieved, and if the height is too high, the heat exchange effect of the finned heat exchanger 31 will be affected.

[0044] The fresh air air conditioning unit of this embodiment adopts the above-mentioned fin-type heat exchanger anti-blowing water structure of this embodiment, which can avoid the blowing water problem caused by the high wind pressure generated when the distance between the fan 40 and the fin-type heat exchanger 31 is too close or when the fan 40 runs at high speed, which brings out the condensed water between the bottom of the fin-type heat exchanger 31 and the water receiving tray 32.

[0045] The finned heat exchanger anti-blowing water structure and fresh air air conditioning unit of this embodiment adopts a water retaining strip 33 made of EPP material in the gap between the water receiving tray 32 and the finned heat exchanger 31 to prevent the passage of negative pressure airflow, which well solves the problem of blowing water caused by condensed water brought out by the airflow at the bottom of the finned heat exchanger 31 due to the large negative pressure. A water retaining plate 34 is set on the folding plate 323 on the water receiving tray 32. The inclined design of the inclined plate 342 of the water retaining plate 34 increases the distance of blocking and collecting and facilitates the flow of water droplets into the water receiving tray, reducing the risk of condensed water being brought out for the second time. The problem of blowing water between the bottom of the finned heat exchanger 31 and the water receiving tray 32 is solved by relatively simple means when the distance between the finned heat exchanger 31 and the fan 40 is close or the wind speed of the fan 40 is high. The structure of the utility model is simple to install, and the reliability of product use is increased at a low cost, while bringing a better experience to users without increasing costs.

[0046] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and the utility model is also intended to include these modifications and modifications.

Claims

1. A fin heat exchanger anti-blow water structure, characterized in that: It includes a finned heat exchanger, a water receiving tray, and a water retaining strip; the water receiving tray is arranged at the bottom of the finned heat exchanger; a cavity is formed between the bottom of the air outlet surface of the finned heat exchanger and the side surface of the water receiving tray close to the air outlet surface of the finned heat exchanger; the water retaining strip is arranged in the cavity.

2. The finned heat exchanger anti-blow water structure according to claim 1, characterized in that: The water receiving pan is provided with a water receiving trough; the bottom of the fin-type heat exchanger is arranged in the water receiving trough; the cavity is formed between the bottom of the air outlet surface of the fin-type heat exchanger and the side of the water receiving trough; the water retaining bar is embedded in the cavity and arranged on the bottom surface of the water receiving trough; the water retaining bar is in contact with the side surface and / or the bottom surface of the water receiving trough; the water receiving pan is also provided with a drain outlet connected to the water receiving trough.

3. The anti-blow water structure of the finned heat exchanger according to claim 1, characterized in that: The water retaining strip is made of foamed PP material.

4. The finned heat exchanger anti-blow water structure according to claim 2, characterized in that: In the water retaining strip, the side surface in contact with the bottom of the air outlet surface of the fin-type heat exchanger is recorded as the first side surface of the water retaining strip. A water retaining strip chamfer is arranged between the first side surface of the water retaining strip and the top surface of the water retaining strip, and a water retaining strip inclined surface is formed between the first side surface of the water retaining strip and the top surface of the water retaining strip.

5. The anti-blow water structure of the finned heat exchanger according to claim 4 is characterized in that: The angle between the inclined surface of the water retaining strip and the air outlet surface of the fin-type heat exchanger is an acute angle.

6. The finned heat exchanger anti-blow water structure according to claim 2, characterized in that: It also includes a water baffle; a folding plate is arranged on the top of the water receiving tray, and the folding plate forms an angle with the top of the side wall of the water receiving trough, and the folding plate extends in a direction away from the fin heat exchanger; the water baffle is arranged on the folding plate.

7. The anti-blow water structure of the finned heat exchanger according to claim 6, characterized in that: The water retaining plate includes a bottom plate, an inclined plate, and two end plates; the bottom plate is fixedly arranged on the folding plate, the inclined plate is fixedly arranged on the side of the bottom plate away from the fin heat exchanger, and is inclined upward toward the side away from the fin heat exchanger; the two end plates are respectively arranged at the two ends of the bottom plate and the inclined plate, and each end plate is respectively connected to the same end of the bottom plate and the inclined plate; the bottom plate, the inclined plate and the two end plates are enclosed to form a water retaining plate trough; the height of the inclined plate in the vertical direction is 15-40mm.

8. The finned heat exchanger anti-blow water structure according to claim 7, characterized in that: The inclination angle of the inclined plate is 60°.

9. The anti-blow water structure of the finned heat exchanger according to claim 6, characterized in that: The water baffle is fixed to the hem plate by screws.

10. A fresh air air conditioning unit, characterized in that: It comprises the anti-blow water structure of the fin type heat exchanger as described in any one of claims 1-9.

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