CN218820940U

CN218820940U - Water collector subassembly and air conditioning unit

Info

Publication number: CN218820940U
Application number: CN202222746090.1U
Authority: CN
Inventors: 刘加春; 陈培生; 黄洪乐; 闫国杰; 安亚洲
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2022-10-18
Filing date: 2022-10-18
Publication date: 2023-04-07
Anticipated expiration: 2032-10-18

Abstract

The utility model discloses a water collector subassembly and air conditioning unit, wherein, the water collector subassembly includes: the first water receiving tray is provided with a first water receiving groove; and the second water receiving tray is provided with a second water receiving groove, the second water receiving tray is connected to the first water receiving tray, and the first water receiving groove and the second water receiving groove are mutually isolated. The utility model discloses a water collector subassembly and air conditioning unit have solved effectively and have gathered the problem that the comdenstion water made air conditioning unit loss cold volume in the water collector among the prior art.

Description

Water collector subassembly and air conditioning unit

Technical Field

The utility model relates to a refrigeration technology field particularly, relates to a water collector subassembly and air conditioning unit.

Background

The ground air conditioning unit for airplane is a special air conditioner with full fresh air, and the treated air is high temperature and high humidity air. The unit adopts a direct evaporative refrigeration cycle technology, cools and cools air passing through an evaporator by evaporating a refrigerant in an evaporator coil, and sends low-temperature air into an airplane cabin through a long special air supply hose and a special joint by utilizing a fan generating strong air supply pressure.

In order to reduce the temperature and humidity of the air to be treated, an evaporator of the air conditioning unit must have enough refrigerating and dehumidifying capacity, and because the front-back pressure difference of the evaporator is large, a huge negative pressure cavity is formed in an air duct from the back of the evaporator to a blower, so that condensed water cannot be discharged automatically. When the aircraft ground air conditioning unit is hung on the gallery bridge, the height of the aircraft ground air conditioning unit is limited by the height of the gallery bridge, and the height of the aircraft ground air conditioning unit must be reduced as much as possible, so that the condensate water is difficult to discharge under the condition of high negative pressure in the unit. At present, the air conditioning unit usually adopts a method of adding a trap for water drainage, but the method cannot be adopted because the height of the air conditioning unit on the ground of the airplane is limited.

In the prior art, condensed water of the ground air conditioning unit of the airplane cannot be normally discharged, so that the condensed water is accumulated in the water receiving disc, and the accumulated condensed water can weaken the heat exchange capacity of the evaporator, so that the air conditioning unit loses cold energy.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an in provide a water collector subassembly and air conditioning unit to gather the problem that the comdenstion water made air conditioning unit loss cold volume in the water collector among the solution prior art.

In order to achieve the above purpose, the utility model provides a water collector subassembly, include: the first water receiving tray is provided with a first water receiving groove; and the second water receiving tray is provided with a second water receiving tank, the second water receiving tray is connected to the first water receiving tray, and the first water receiving tank and the second water receiving tank are mutually isolated.

Furthermore, a partition plate is connected to the second water receiving tray, the partition plate is arranged in the second water receiving tank, the partition plate divides the second water receiving tank into a first chamber and a second chamber, and a first throttling hole is formed in the partition plate; the first chamber is communicated with the notch of the second water receiving tank; the first chamber is communicated with the second chamber through a first throttling hole; the second chamber is communicated with the drain hole of the second water pan.

Furthermore, the partition plate is connected with a baffle plate, the baffle plate is positioned in the first chamber, and the baffle plate divides the first chamber into at least two sub-chambers.

Further, the number of the first throttling holes is multiple, the number of the first throttling holes corresponds to that of the sub-chambers, and each sub-chamber is communicated with the second chamber through at least one first throttling hole.

Further, the partition plate is of an elastic plate structure.

Furthermore, a second water receiving tray is arranged in the first water receiving tank, and a water receiving space of the first water receiving tank is formed between the outer wall of the second water receiving tray and the inner wall of the first water receiving tank.

Furthermore, the second water receiving tray protrudes out of the first water receiving tank, and the notch of the second water receiving tank is located outside the first water receiving tank.

Further, the method also comprises the following steps: the first water discharge pipe is communicated with the first water receiving tank; and the second drain pipe is communicated with the second water receiving tank.

Furthermore, the second water discharge pipe comprises N U-shaped bends which are arranged in series, wherein N is more than or equal to 1, and N is an integer.

Further, a heat insulation layer is laid on the outer surface of the second water receiving tray.

According to another aspect of the utility model, an air conditioning unit is provided, including the heat exchanger, and foretell water collector subassembly, water collector subassembly sets up the bottom at the heat exchanger.

Furthermore, the first water pan is positioned below the second water pan, and the second water pan is positioned below the heat exchanger; the first water receiving groove of the first water receiving tray is used for receiving condensed water and rainwater at the exposed pipe of the heat exchanger; the second water receiving tray is arranged at a position where the second water receiving tank receives the condensed water in the heat exchanger.

Furthermore, a lower protective plate is arranged at the bottom of the heat exchanger, the lower protective plate is provided with a second throttling hole, the lower protective plate is connected to a second water receiving tray, the lower protective plate is located at the position of a notch of a second water receiving groove, and the second throttling hole is communicated with the second water receiving groove; and the condensed water in the heat exchanger enters the second water receiving tank through the second throttling hole.

Furthermore, a second water receiving tray is arranged in the first water receiving tank, and a water receiving space of the first water receiving tank is formed between the outer wall of the second water receiving tray and the inner wall of the first water receiving tank; the area and the arrangement position of the water receiving space correspond to the exposed pipe of the heat exchanger and the partial area of the periphery of the heat exchanger.

Furthermore, a partition plate is connected to the second water receiving tray, the partition plate is arranged in the second water receiving tank, the partition plate divides the second water receiving tank into a first chamber and a second chamber, and a first throttling hole is formed in the partition plate; the first chamber is communicated with the notch of the second water receiving tank; the first chamber is communicated with the second chamber through a first throttling hole; the second chamber is communicated with a drain hole of the second water pan; the partition plate is connected with a baffle plate, the baffle plate is positioned in the first chamber, and the baffle plate divides the first chamber into at least two sub-chambers; the number of the heat exchangers is at least two, each heat exchanger corresponds to one sub-chamber, and the second throttling hole of each heat exchanger is communicated with the corresponding sub-chamber; the number of the first throttling holes is multiple, the number of the first throttling holes corresponds to that of the sub-chambers, and each sub-chamber is communicated with the second chamber through at least one first throttling hole.

Furthermore, all the heat exchangers are arranged at intervals along the airflow direction of the heat exchange air flue, and all the sub-chambers are sequentially arranged along the airflow direction of the heat exchange air flue.

Furthermore, the second water receiving tray protrudes out of the first water receiving tank, and the notch of the second water receiving tank is positioned outside the first water receiving tank; the lower protective plate is connected with the side wall of the heat exchange air duct where the heat exchanger is located in a sealing mode, and the second water pan is connected with the lower protective plate in a sealing mode.

Furthermore, the air conditioning unit is an airplane ground air conditioning unit, and the heat exchanger is an evaporator.

Further, still include: the first drainage pipe is communicated with the first water receiving tank; and the second drain pipe is communicated with the second water receiving tank and comprises N U-shaped bends which are arranged in series, wherein N is more than or equal to 1, and N is an integer.

Further, the air conditioning unit comprises a variable frequency fan, the air supply pressure of the variable frequency fan is P, wherein the larger the P value is, the larger the N value is.

The utility model provides a novel water collector subassembly structure through installing in the bottom of heat exchanger to receive the comdenstion water of different positions. The first water receiving tank of the first water receiving tray is used for receiving condensed water and rainwater at the exposed pipe of the heat exchanger; and the second water receiving tank of the second water receiving tray is used for receiving the condensed water in the heat exchanger. First water receiving tank and second water receiving tank are mutual isolation, and inside and outside comdenstion water is separately, and rainwater, comdenstion water are separately, avoid cold, warm water to mix, and the heat exchanger that corresponds like this also can not take place the heat transfer with the comdenstion water, reduces heat load promptly, prevents cold volume loss to reach energy-conserving purpose.

Drawings

Fig. 1 is a schematic structural view of a water pan assembly according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a second water pan of the water pan assembly according to the embodiment of the present invention;

fig. 3 is a schematic structural view of a first drain pipe and a second drain pipe of the water pan assembly according to the embodiment of the present invention;

fig. 4 is a schematic view of the internal structure of the air conditioning unit according to the embodiment of the present invention; and

fig. 5 is a schematic structural diagram of an air conditioning unit according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific examples, which should not be construed as limiting the invention.

Referring to fig. 1 to 3, according to an embodiment of the present invention, a water pan assembly is provided, which is mainly used in an aircraft ground air conditioning unit. The water pan assembly comprises a first water pan 10 and a second water pan 20, and the first water pan 10 is provided with a first water receiving tank 11; the second water receiving tray 20 is provided with a second water receiving tank 21, the second water receiving tray 20 is connected to the first water receiving tray 10, and the first water receiving tank 11 and the second water receiving tank 21 are mutually isolated.

The utility model provides a novel water collector subassembly structure through installing in the bottom of heat exchanger (evaporimeter) to receive the comdenstion water of different positions. The first water receiving tank 11 of the first water receiving tray 10 is used for receiving condensed water and rainwater (with higher temperature) at the exposed pipe of the heat exchanger 30; the second water receiving tank 21 of the second water receiving tray 20 is used for receiving condensed water (with lower temperature) inside the heat exchanger 30. First water receiving tank and second water receiving tank are mutual isolation, and inside and outside comdenstion water is separately, and rainwater, comdenstion water are separately, avoid cold, warm water to mix, and the heat exchanger that corresponds like this also can not take place the heat transfer with the comdenstion water, reduces heat load promptly, prevents cold volume loss to reach energy-conserving purpose.

Preferably, referring to fig. 2 and 4, a partition plate 22 is connected to the second drain pan 20, the partition plate 22 is disposed in the second drain pan 21, the partition plate 22 divides the second drain pan 21 into a first chamber 21a and a second chamber 21b, and a first orifice 221 is disposed in the partition plate 22. The first chamber 21a is communicated with the notch of the second water receiving tank 21; the first chamber 21a communicates with the second chamber 21b through the first orifice 221; the second chamber 21b communicates with a drain hole of the second drip tray 20.

Inside air conditioning unit, if the heat exchanger is located the air current low reaches of fan, the heat exchanger was in the highly compressed condition of malleation this moment, and comdenstion water discharge pressure is too big, and the comdenstion water velocity of flow is too fast, takes away cold volume easily, consequently will step down the comdenstion water, especially the inside comdenstion water of evaporimeter. Therefore, the utility model discloses further improve the second water collector, step down and slow down the comdenstion water through first cavity 21a and second cavity 21 b. Specifically, the condensed water first enters the first chamber 21a and then enters the second chamber 21b through the first orifice 221, and the first orifice 221 can reduce the fluid pressure, so that the air flow and the condensed water flow are throttled again when passing through the first orifice 221, and the pressure is further reduced. The flow passing through the partition plate 22 expands again in the second chamber 21b, the pressure further decreases (i.e., the cavity effect decreases), the speed becomes zero, and the dynamic pressure becomes totally static pressure. The condensed water is collected in the second chamber 21b and enters the drainage system through the drainage hole of the second drip tray 20 by static pressure.

In order to further reduce the pressure, in this embodiment, a baffle 23 is connected to the partition plate 22, the baffle 23 is located in the first chamber 21a, and the baffle 23 divides the first chamber 21a into at least two sub-chambers 21c. The water-containing airflow flowing out or sprayed out of the evaporator collides, reflects, mixes and expands in the sub-chamber 21c, the pressure of the airflow is reduced, the speed is reduced, the noise is reduced, and the condensed water collides, reflects, adsorbs, settles and polymerizes. The number of the sub-chambers 21c can be set according to the number of the evaporators, if the number of the evaporators of the air conditioning unit is multiple, the sub-chambers corresponding to the number of the evaporators one by one are set, and the sub-chambers are used for receiving airflow and condensed water flowing out of the bottoms of the evaporators.

The number of the first throttle holes 221 is plural, the number of the first throttle holes 221 corresponds to the number of the sub-chambers 21c, and each sub-chamber 21c communicates with the second chamber 21b through at least one first throttle hole 221. Every subchamber 21c all communicates with second chamber 21b, and this kind of cooperation has constituted a plurality of dilatation and has stepped down the combination, reaches maximum decompression effect.

The partition plate 22 is of an elastic plate structure. The partition plate 22 is thin and has certain elasticity, a plurality of first throttling holes are distributed in the partition plate 22, kinetic energy of air flow and water drops can be reduced through the partition plate, and fluid pressure is reduced through the first throttling holes.

The second water pan 20 is disposed in the first water receiving tank 11, and a water receiving space of the first water receiving tank 11 is formed between an outer wall of the second water pan 20 and an inner wall of the first water receiving tank 11. Referring to fig. 1, the second water-receiving tray 20 is located in the first water-receiving tray, and the second water-receiving tray and the first water-receiving tray are integrally located in a vertically distributed position relationship. The second water pan is welded on the first water pan, and the side wall of the second water pan, the bottom of the first water tank and the partition plate 22 form the second chamber.

Of course, the first water pan and the second water pan can be connected into an integral structure through an integral forming process. In this embodiment, first water collector and second water collector are all rectangular, and first water collector is punched, is bent, is welded by the sheet metal component and forms. The bottom is in a step shape, the periphery is provided with a skirt edge, and the skirt edge is provided with a pipe hole and a water outlet hole. In other embodiments, not shown, the first and second trays may be circular, triangular, or other shapes.

In order to ensure the heat insulation effect and prevent the water in the first water receiving tank and the second water receiving tank from exchanging heat, in this embodiment, a heat insulation layer 24 is laid on the outer surface of the second water receiving tray 20, and the heat insulation layer 24 is generally a heat insulation sponge. Referring to fig. 4, the heat insulation layer 24 directly separates the contact area capable of exchanging heat between the first water receiving tank and the second water receiving tank, so as to play a role in heat insulation and further prevent the loss of cooling capacity.

Because first water collector 20 is installed in first water collector 11, in order to prevent that the condensate water and the rainwater in the first water collector from flowing backward or splashing to the second water collector, so with the institutional advancement of second water collector 20: the second water receiving tray 20 protrudes from the first water receiving tank 11, and the notch of the second water receiving tank 21 is located outside the first water receiving tank 11. The first water pan is integrally positioned below the second water pan, so that the condensed water in the second water pan 20 is prevented from being mixed with rainwater and condensed water with higher temperature.

As shown in fig. 3, the water pan assembly further includes a first drain pipe 41 and a second drain pipe 42, where the first drain pipe 41 is communicated with the first water receiving tank 11; the second drain pipe 42 communicates with the second water receiving tank 21. The first drainage pipe and the second drainage pipe form two water inlets, and the first drainage pipe and the second drainage pipe are converged into one position to be discharged, namely, water is discharged through one water outlet. The two drain pipes discharge the comdenstion water of two water receiving tanks respectively, and the benefit that sets up like this is that the more water of impurity can directly be discharged in the first water receiving tank, prevents to pollute in the unit, and the pipeline can be adjusted to great diameter moreover, and the drainage is not influenced by other factors, and the drainage is efficient. And the second drain pipe 42 can be used for independently controlling the second drain pipe 42 to be closed aiming at the condensed water of the second water receiving tray, and after the condensed water after pressure reduction is finished reaches a certain height, the condensed water starts to drain under the action of static pressure, so that periodic gap drainage is realized.

Preferably, the second drain pipe 42 includes N U-bends 42a arranged in series, where N ≧ 1, N is an integer.

N is more than or equal to 1, N =1, 2 and 3 \ 8230n, the specific numerical value depends on the air supply pressure of a fan (high-pressure frequency conversion centrifugal fan) of an air conditioning unit (airplane ground air conditioning unit), and the larger the air supply pressure is, the larger the N numerical value is. The second drain pipe 42 is composed of a plurality of PVC straight pipes, PVC elbows, and a PVC right-angle tee joint by bonding (fusion), and forms N U-bends 42a. The second drain pipe 42 functions to: the on-way friction resistance of the straight pipe section, the local resistance of the elbow and the liquid column static pressure are utilized to further reduce the pressure, so that normal-pressure drainage is realized; meanwhile, the liquid sealing function of the U-shaped bend is utilized to isolate indoor and outdoor air, so that indoor air supply pollution is prevented, heat load is reduced, and energy conservation is realized. The liquid seal position of the U-shaped bend moves between the 1 st U-shaped bend and the Nth U-shaped bend along with the frequency change of a fan (a high-voltage frequency conversion centrifugal fan), the liquid seal position is located at the Nth U-shaped bend when the frequency is the largest, and the liquid seal position is located at the 1 st U-shaped bend when the frequency is the smallest. Thus, at least 1 hydraulic seal is effective no matter at which frequency.

Assuming that the pressure at the water inlet of the second water discharge pipe 42 is P1, the pressure at the water outlet of the water discharge pipe is P0, and P0 is atmospheric pressure, and the pressure difference therebetween is Δ P, Δ P = P1-P0. When the delta P is larger than 0, a liquid seal is established at the Nth U-shaped bend, and once water is accumulated in the second water pan, water is drained immediately; when delta P =0, a liquid seal is established in the first U-shaped bend, and water begins to drain under the action of static pressure along with the increase of accumulated water in the water receiving tray; when the delta P is less than 0, a liquid seal is established at the U-shaped bend between the first channel and the Nth channel, no water is drained at the moment, and after water is accumulated to a certain height, water drainage is started under the action of static pressure. Under the three conditions, periodic gap drainage can be realized. When the frequency of the high-voltage frequency conversion centrifugal fan changes, namely the outlet air supply pressure changes, the high-voltage frequency conversion centrifugal fan can adapt to the change in real time.

The utility model also provides an embodiment of air conditioning unit, see figure 4 and figure 5, air conditioning unit includes heat exchanger 30 and the water collector subassembly of above-mentioned embodiment, and the water collector subassembly sets up the bottom at heat exchanger 30.

As shown in fig. 4, the first water-receiving tray 10 is located below the second water-receiving tray 20, and the second water-receiving tray 20 is located below the heat exchanger 30; the first water receiving tank 11 of the first water receiving tray 10 is used for receiving condensed water and rainwater at the exposed pipe of the heat exchanger 30; the second water receiving tray 20 is disposed at a position such that the second water receiving tank 21 receives the condensed water inside the heat exchanger 30.

The novel water pan component structure is arranged at the bottom of the heat exchanger (evaporator) to receive condensed water at different positions. The first water receiving tank 11 of the first water receiving tray 10 is used for receiving condensed water and rainwater (with higher temperature) at the exposed pipe of the heat exchanger 30; the second water receiving tank 21 of the second water receiving tray 20 is used for receiving condensed water (with lower temperature) inside the heat exchanger 30. First water receiving tank and second water receiving tank are mutual isolation, and inside and outside comdenstion water is separately, and rainwater, comdenstion water are separately, avoid cold, warm water to mix, and the heat exchanger that corresponds like this also can not take place the heat transfer with the comdenstion water, reduces heat load promptly, prevents cold volume loss to reach energy-conserving purpose.

The first water pan and the second water pan can be fixedly connected to a shell of the air conditioning unit or an internal air duct structure, and only the first water pan needs to be arranged at a position corresponding to the exposed pipe of the heat exchanger, so that condensed water at the exposed pipe of the heat exchanger and rainwater entering from the outside can flow into the first water receiving tank along the exposed pipe of the heat exchanger by means of gravity. In a similar way, the arrangement position of the second water pan corresponds to the heat exchange tube in the heat exchanger, so that the condensed water in the heat exchanger flows into the second water receiving tank along the internal heat exchange tube against gravity after flowing to the bottom of the heat exchanger. The first water receiving tray and the second water receiving tray can be connected to different structures respectively without direct connection. Of course, the first water pan and the second water pan can also be connected together and then fixed at the bottom of the air conditioning unit shell.

Preferably, the bottom of the heat exchanger 30 is provided with a lower protection plate 31, the lower protection plate 31 is provided with a second throttling hole 311, the lower protection plate 31 is connected to the second water receiving tray 20, the lower protection plate 31 is located at the position of a notch of the second water receiving tank 21, and the second throttling hole 311 is communicated with the second water receiving tank 21; the condensed water in the heat exchanger 30 enters the second water receiving tank 21 through the second throttle hole 311.

The lower guard plates of the heat exchanger (namely the evaporator) are provided with second throttling holes, and the second throttling holes are used for discharging condensed water and reducing the pressure of airflow passing through the second throttling holes. And the second throttling hole 311 and the second water receiving tank 21 form cavity effect pressure reduction matching, and the air flow pressure is reduced again.

The second water pan 20 is arranged in the first water receiving tank 11, and a water receiving space of the first water receiving tank 11 is formed between the outer wall of the second water pan 20 and the inner wall of the first water receiving tank 11; the area and the arrangement position of the water receiving space correspond to the exposed pipe of the heat exchanger 30 and the partial area of the periphery of the heat exchanger 30. Referring to fig. 4, the water receiving space of the first water receiving tank 11 is directed to the exposed pipe of the heat exchanger and the area of the periphery thereof, so that the structure of the first water receiving tray is expanded to the periphery of the heat exchanger so as to receive the condensed water on the surface of the heat exchanger (the exposed pipe part) and the rainwater entering from the outside. The area of the water receiving space can be selected according to the size of the air conditioning unit and the shape of the heat exchanger.

Preferably, the second water receiving tray 20 is connected with a partition plate 22, the partition plate 22 is arranged in the second water receiving tank 21, the partition plate 22 divides the second water receiving tank 21 into a first chamber 21a and a second chamber 21b, and a first throttle hole 221 is formed in the partition plate 22; the first chamber 21a is communicated with the notch of the second water receiving tank 21; the first chamber 21a communicates with the second chamber 21b through the first orifice 221; the second chamber 21b is communicated with a drain hole of the second water pan 20; the partition plate 22 is connected with a baffle plate 23, the baffle plate 23 is positioned in the first chamber 21a, and the baffle plate 23 divides the first chamber 21a into at least two sub-chambers 21c; the number of the heat exchangers 30 is at least two, each heat exchanger 30 corresponds to one sub-chamber 21c, and the second throttling hole 311 of each heat exchanger 30 is communicated with the corresponding sub-chamber 21c; the number of the first throttle holes 221 is plural, the number of the first throttle holes 221 corresponds to the number of the sub-chambers 21c, and each sub-chamber 21c communicates with the second chamber 21b through at least one first throttle hole 221.

In the present embodiment, the number of the heat exchangers is two, and the number of the sub-chambers 21c is also two. Each heat exchanger corresponds to a group of second throttling holes 311 (the number of the second throttling holes can be multiple), and each heat exchanger corresponds to one sub-chamber, so that the internal condensed water of each heat exchanger can be connected by the second water receiving tray. Moreover, the baffle 23 separating the sub-chambers can play a role in blocking reflection, consume the kinetic energy in the airflow, reduce noise and prevent condensed water droplets from flowing back due to different upstream and downstream pressures.

Preferably, all the heat exchangers 30 are arranged at intervals along the airflow direction of the heat exchange air duct, and all the sub-chambers 21c are arranged in sequence along the airflow direction of the heat exchange air duct. The cooperation structure of second water collector and heat exchanger can avoid causing condensation drop of water or air current backward flow because of the air current upstream and downstream pressure reduces gradually, reduces the sensible heat loss that the temperature step-by-step-down produced. As shown in FIG. 4, the center of the second orifice of the lower protective plate of the evaporator is respectively taken asbase:Sub>A section A-A andbase:Sub>A section B-B, and the corresponding temperature and pressure at the section are respectively t _a 、t _b ，P _a 、P _b Due to on-way resistance, P _a ＞P _b Let the pressure difference between them be Δ P _z ，ΔP _z ＝P _a －P _b Under the action of the pressure difference, small water drops discharged from the A-A position may flow back into the air duct through the B-B position, so that sensible heat loss is caused. Let the temperature difference between A-A and B-B be Delta T _Z ，ΔT _Z ＝t _a －t _b T, because the evaporator gradually exchanges heat and cools _a ＞t _b Q = cm Δ T, where Q is sensible heat loss, m is mass of returned water droplets, and c is specific heat of water _Z . Therefore, no water drops flow back, and sensible heat loss can be avoided.

The air conditioning unit is an airplane ground air conditioning unit, and the heat exchanger is an evaporator. The water collector component is arranged in the ground air conditioning unit of the airplane, and can realize normal-pressure drainage through various pressure reduction effects, so that drainage splashing is avoided. When the heat exchanger is located the air current low reaches of fan, the heat exchanger is in the malleation, and the water collector subassembly can step down through the pressure reduction structure, realizes the ordinary pressure drainage. If the heat exchanger is in the air flow upper reaches of fan, the heat exchanger is in the negative pressure, and water collector subassembly also can realize pressure balance, can normally drain.

The second water receiving tray 20 protrudes out of the first water receiving tank 11, and the notch of the second water receiving tank 21 is positioned outside the first water receiving tank 11; the lower protection plate 31 is connected with the side wall of the heat exchange air duct in a sealing manner, and the second water pan 20 is connected with the lower protection plate 31 in a sealing manner. The shape of second water collector 20 and the sealed cooperation between the backplate down can play the thermal-insulated effect that keeps warm, moreover, produces between second water collector and the backplate and cuts off the fluid effect, mainly to the service environment of aircraft ground air conditioning unit, can prevent that outdoor hot-air from scurrying into, and indoor cold air spills.

The air conditioning unit further comprises a first water discharge pipe 41 and a second water discharge pipe 42, wherein the first water discharge pipe 41 is communicated with the first water receiving tank 11; the second water discharge pipe 42 is communicated with the second water receiving tank 21, and the second water discharge pipe 42 comprises N U-shaped bends 42a which are arranged in series, wherein N is more than or equal to 1, and N is an integer.

The air conditioning unit comprises a variable frequency fan 50, wherein the air supply pressure of the variable frequency fan 50 is P, and the larger the P value is, the larger the N value is.

N is more than or equal to 1, N =1, 2 and 3 \8230n, the specific numerical value depends on the air supply pressure P of a fan (high-pressure frequency conversion centrifugal fan) of an air conditioning unit (airplane ground air conditioning unit), and the larger the air supply pressure P is, the larger the N numerical value is. The second drain pipe 42 is composed of a plurality of PVC straight pipes, PVC elbows, and a PVC right-angle tee joint by bonding (fusion), and forms N U-bends 42a. The second drain pipe 42 functions to: the on-way friction resistance of the straight pipe section, the local resistance of the elbow and the liquid column static pressure are utilized to further reduce the pressure, so that normal-pressure drainage is realized; meanwhile, the liquid sealing function of the U-shaped bend is utilized to isolate indoor and outdoor air, so that indoor air supply pollution is prevented, heat load is reduced, and energy conservation is realized. The liquid seal position of the U-shaped bend moves between the 1 st U-shaped bend and the Nth U-shaped bend along with the frequency change of a fan (a high-voltage frequency conversion centrifugal fan), the liquid seal position is located at the Nth U-shaped bend when the frequency is the largest, and the liquid seal position is located at the 1 st U-shaped bend when the frequency is the smallest. So that at least 1 liquid seal is active no matter which frequency.

The airplane ground air conditioning unit comprises a variable-frequency centrifugal fan, a flexible joint, a heat exchange air duct, two evaporators, a water collector assembly, a drain pipe, a plurality of sponges, a plurality of sealing gaskets and the like. The frequency conversion centrifugal fan is used as a power source for supplying air. When the variable frequency centrifugal fan is positioned at the upstream of the airflow, the variable frequency centrifugal fan corresponds to the positive pressure drainage system; the frequency conversion centrifugal fan is positioned at the downstream of the air flow, namely behind the evaporator and corresponds to the negative pressure drainage system. The high-frequency centrifugal fan, the flexible joint, the heat exchange air duct and the two evaporators are connected in series, and a sealing gasket is arranged between the adjacent parts and used for constructing a sealing channel. The flexible joint plays a role in flexible connection; the heat exchange air duct plays a role of a channel; the evaporator plays a heat exchange role. The direction of the air flow is from the frequency conversion centrifugal fan to the heat exchange air duct. The water flow direction is that the inside of the evaporator flows to the second water pan, the outside condensed water of the evaporator and the rainwater flow the first external water pan, the above two paths of water are converged in the drain pipe and then are discharged from the water outlet of the drain pipe component. Frequency conversion centrifugal fan, flexible joint, heat transfer wind channel, two evaporimeters, water collector subassembly, drainage pipe assembly outward appearance all carry out heat preservation and handle, and the purpose is heat preservation and heat insulation, prevents to leak cold or freeze.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

Of course, the above is a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, without departing from the basic principle of the present invention, several modifications and decorations can be made, and these modifications and decorations are also regarded as the protection scope of the present invention.

Claims

1. A water tray assembly, comprising:

the first water receiving tray (10) is provided with a first water receiving groove (11);

the second water receiving tray (20) is provided with a second water receiving groove (21), the second water receiving tray (20) is connected to the first water receiving tray (10), and the first water receiving groove (11) and the second water receiving groove (21) are mutually isolated.

2. The drip tray assembly of claim 1,

a partition plate (22) is connected to the second water receiving tray (20), the partition plate (22) is arranged in the second water receiving tank (21), the partition plate (22) divides the second water receiving tank (21) into a first chamber (21 a) and a second chamber (21 b), and a first throttling hole (221) is formed in the partition plate (22);

the first chamber (21 a) is communicated with a notch of the second water receiving tank (21); the first chamber (21 a) and the second chamber (21 b) communicate through a first orifice (221); the second chamber (21 b) is communicated with a drain hole of the second water pan (20).

3. A drip tray assembly according to claim 2, wherein a baffle (23) is attached to the divider plate (22), the baffle (23) being located within the first chamber (21 a), the baffle (23) dividing the first chamber (21 a) into at least two sub-chambers (21 c).

4. A drip tray assembly according to claim 3, wherein said first restriction apertures (221) are plural in number, said first restriction apertures (221) corresponding in number to said sub-chambers (21 c), each of said sub-chambers (21 c) communicating with a second chamber (21 b) through at least one of said first restriction apertures (221).

5. A drip tray assembly according to claim 2, wherein the divider plate (22) is of a resilient plate construction.

6. The drip tray assembly of claim 1,

the second water pan (20) is arranged in the first water receiving tank (11), and a water receiving space of the first water receiving tank (11) is formed between the outer wall of the second water pan (20) and the inner wall of the first water receiving tank (11).

7. The drip tray assembly of claim 6,

the second water collecting tray (20) protrudes out of the first water collecting groove (11), and the notch of the second water collecting groove (21) is located outside the first water collecting groove (11).

8. The drip tray assembly of claim 1, further comprising:

the first water drainage pipe (41), the first water drainage pipe (41) is communicated with the first water receiving tank (11);

and the second water discharge pipe (42), and the second water discharge pipe (42) is communicated with the second water receiving tank (21).

9. A drip tray assembly according to claim 8, wherein the second drain tube (42) comprises N U-bends (42 a) arranged in series, where N ≧ 1, N is an integer.

10. A drip tray assembly according to claim 1 or claim 6, in which the outer surface of the second drip tray (20) is provided with a thermally insulating layer (24).

11. Air conditioning assembly comprising a heat exchanger (30), characterized in that it comprises a water tray assembly according to any one of claims 1 to 10, which is arranged at the bottom of the heat exchanger (30).

12. Air conditioning assembly according to claim 11,

the first water pan (10) is positioned below the second water pan (20), and the second water pan (20) is positioned below the heat exchanger (30);

the first water receiving tank (11) of the first water receiving tray (10) is used for receiving condensed water and rainwater at an exposed pipe of the heat exchanger (30);

the second water receiving tray (20) is arranged at a position which enables the second water receiving tank (21) to receive condensed water inside the heat exchanger (30).

13. Air conditioning assembly according to claim 12, characterized in that the bottom of the heat exchanger (30) has a bottom cover (31), the bottom cover (31) has a second orifice (311), the bottom cover (31) is connected to the second water receiving tray (20), the bottom cover (31) is located at a notch position of the second water receiving tray (21), and the second orifice (311) communicates with the second water receiving tray (21);

condensed water in the heat exchanger (30) enters the second water receiving tank (21) through the second throttle hole (311).

14. Air conditioning assembly according to claim 12,

the second water receiving tray (20) is arranged in the first water receiving tank (11), and a water receiving space of the first water receiving tank (11) is formed between the outer wall of the second water receiving tray (20) and the inner wall of the first water receiving tank (11);

the area and the arrangement position of the water receiving space correspond to the exposed pipe of the heat exchanger (30) and a partial area of the periphery of the heat exchanger (30).

15. Air conditioning assembly according to claim 13,

the first chamber (21 a) is communicated with a notch of the second water receiving tank (21); the first chamber (21 a) and the second chamber (21 b) communicate through a first orifice (221); the second chamber (21 b) is communicated with a drain hole of the second water pan (20);

a baffle plate (23) is connected to the partition plate (22), the baffle plate (23) is positioned in the first chamber (21 a), and the baffle plate (23) divides the first chamber (21 a) into at least two sub-chambers (21 c);

the number of the heat exchangers (30) is at least two, each heat exchanger (30) corresponds to one sub-chamber (21 c), and the second throttling hole (311) of each heat exchanger (30) is communicated with the corresponding sub-chamber (21 c);

the number of the first throttle holes (221) is multiple, the number of the first throttle holes (221) corresponds to the number of the sub-chambers (21 c), and each sub-chamber (21 c) is communicated with the second chamber (21 b) through at least one first throttle hole (221).

16. Air conditioning assembly according to claim 15, wherein all of said heat exchangers (30) are arranged at intervals along the air flow direction of the heat exchange air duct, and all of said sub-chambers (21 c) are arranged in sequence along the air flow direction of the heat exchange air duct.

17. Air conditioning assembly according to claim 13,

the second water receiving tray (20) protrudes out of the first water receiving tank (11), and a notch of the second water receiving tank (21) is positioned outside the first water receiving tank (11);

the lower protection plate (31) is connected with the side wall of a heat exchange air duct where the heat exchanger is located in a sealing mode, and the second water pan (20) is connected with the lower protection plate (31) in a sealing mode.

18. An air conditioning assembly according to claim 11, wherein the air conditioning assembly is an aircraft floor air conditioning assembly and the heat exchanger is an evaporator.

19. The air conditioning assembly as set forth in claim 18, further comprising:

the second water discharge pipe (42) is communicated with the second water receiving tank (21), the second water discharge pipe (42) comprises N U-shaped bends (42 a) which are arranged in series, N is more than or equal to 1, and N is an integer.

20. The air conditioning assembly according to claim 19, wherein the air conditioning assembly comprises an inverter fan (50), and the supply pressure of the inverter fan (50) is P, wherein the larger the value of P, the larger the value of N.