Fresh air duct structure and air conditioning unit

Abstract

The utility model relates to a fresh air duct structure and an air conditioning unit, the fresh air duct structure comprises an air duct shell, the air duct shell isolates a roundabout fresh air duct in the air conditioning unit, one end of the fresh air duct is connected with a fresh air inlet, and the other end of the fresh air duct is connected with a fresh air outlet. The fresh air inlet and an air return opening of the air return cavity are formed in the air outlet side direction and the air inlet side direction of the evaporator correspondingly, and the fresh air channel bypasses the air supply cavity and the evaporator and communicates with the air return cavity at the far end. Through the arrangement of the roundabout fresh air duct, the length of a flowing path of fresh air from the fresh air inlet to the air return cavity is prolonged, so that wind-blown sand and rainwater entering from the fresh air inlet are easy to naturally settle in the fresh air duct so as to be separated, the wind-blown sand and rainwater are effectively prevented from entering a room through the air return opening, and the riding comfort is improved; and meanwhile, filth blockage of the fresh air filter screen and filth blockage of the evaporator are not prone to being caused, the problem of water leakage when rainwater is heavy can be avoided, and the riding experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rail vehicle air conditioning systems, in particular to a fresh air duct structure and an air conditioning unit. Background Art

[0002] Conventional roof-mounted integrated bus air-conditioning units use partitions to separate the evaporation chamber and the condensation chamber in the shell. The evaporator, evaporation fan, etc. are installed in the evaporation chamber, and the condenser, condensation fan and compressor are installed in the condensation chamber. Return air inlets and air supply outlets are opened on the shell corresponding to the evaporation chamber. A fresh air inlet is also provided on the shell to introduce outdoor fresh air. A fresh air filter and a rainwater separation device are generally provided at the fresh air inlet.

[0003] At present, all top-mounted integrated air conditioning units are set according to the principle of proximity between fresh air inlet and return air inlet. Fresh air and return air are mixed and heat exchanged with the evaporator before being sent into the room through the air supply outlet. The fresh air inlet and return air inlet are set according to the principle of proximity in order to reduce the wind resistance of fresh air, so that the fresh air and return air of the air conditioner are mixed and heat exchanged with the evaporator before being sent into the room.

[0004] However, this structure has three problems: First, for the western regions of my country and the countries in the desert areas of West Asia, there will be problems such as strong wind and sand, which may easily cause the fresh air filter and evaporator to become dirty and blocked, and the heat exchange performance of the air conditioner will be reduced, affecting the performance of the air conditioner and thus affecting the comfort of the passengers; second, after the wind and sand enter the mixing chamber, they will settle during the mixing flow process, so the wind and sand will easily fall into the room from the return air outlet of the air conditioner, causing the indoor air quality to deteriorate and affecting the customer's riding experience; third, when used in areas with heavy rain, because the distance between the fresh air outlet and the return air outlet is relatively close, and the rainwater separation device does not work well, it is easy for rainwater to enter the air conditioner with the fresh air and fall into the room from the return air outlet of the air conditioner, causing leakage, which will also affect the customer's riding experience. Utility Model Content

[0005] The main technical problem solved by the utility model is to provide a fresh air duct structure which can greatly improve the filtering effect of dust and rainwater in the fresh air, and at the same time provide an air conditioning unit equipped with the fresh air duct structure.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0007] A fresh air duct structure comprises an air duct shell, wherein the air duct shell isolates a circuitous fresh air duct inside an air conditioning unit, one end of the fresh air duct is connected to a fresh air inlet, the fresh air inlet and a return air outlet of a return air chamber are respectively arranged in the air outlet side direction and the air inlet side direction of an evaporator, and the fresh air duct bypasses an air supply chamber and an evaporator and is connected to the return air chamber at a far end.

[0008] Furthermore, the fresh air inlet is opened on the side panel of the air conditioning unit casing located on the air outlet side of the evaporator, the evaporator is perpendicular to the side panel, and the return air port is opened on the bottom plate of the air conditioning unit casing located on the air inlet side of the evaporator.

[0009] Furthermore, a fresh air filter and a rainwater separator are installed at the fresh air inlet.

[0010] Furthermore, the air duct housing is surrounded by side plates, a bottom plate and a top plate, and sand discharge holes and / or water discharge holes are arranged on the bottom plate.

[0011] Furthermore, the bottom plate and top plate of the air conditioning unit shell are used as the bottom plate and top plate of the air duct shell, and the side plates of the air duct shell, the evaporator fixing plate and the side plates of the air conditioning unit shell are used to enclose the air supply cavity.

[0012] Furthermore, the circuitous fresh air duct is C-shaped, including a first section parallel to the evaporator, a second section perpendicular to the evaporator, and a third section parallel to the evaporator at the far end, the proximal end of the first section is connected to the fresh air inlet, and the far end of the third section is connected to the return air chamber.

[0013] Furthermore, sand removal holes and / or water removal holes are provided on the bottom plate of the first section of the fresh air duct.

[0014] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0015] An air conditioning unit comprises a shell, wherein an evaporation chamber and a condensation chamber are arranged in the shell, and the fresh air duct structure as described above is installed in the evaporation chamber.

[0016] Furthermore, two evaporators are installed in the evaporation chamber, the fresh air inlet is arranged on the shell side plate between the two evaporators, and the circuitous fresh air duct passes between the two evaporators and then bends and extends toward the return air chambers on both sides.

[0017] Furthermore, an air supply port is opened on the bottom plate of the shell between the fresh air duct and the evaporator.

[0018] In summary, the fresh air duct structure and air conditioning unit provided by the utility model have the following advantages compared with the prior art:

[0019] (1) The utility model extends the flow path length of the fresh air from the fresh air inlet to the return air chamber by setting a circuitous fresh air duct, so that the wind, sand and rain entering from the fresh air inlet can be easily naturally settled in the fresh air duct and then separated, effectively preventing the wind, sand and rain from entering the room through the return air port, thereby improving the riding comfort.

[0020] (2) The utility model realizes effective and thorough separation of wind, sand and rainwater by setting up a circuitous fresh air duct. After the separation of wind and sand, it is not easy to cause the fresh air filter and the evaporator to be dirty and clogged, which is beneficial to the performance of the air conditioner. At the same time, after the separation, the rainwater is not easy to be brought into the return air port, avoiding the problem of water leakage when the rain is heavy, thereby improving the riding experience.

[0021] The specific implementation modes of the present utility model are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation on the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0023] In the attached picture:

[0024] Figure 1 It is a structural schematic diagram of the air-conditioning unit of the utility model.

[0025] In the figure:

[0026] Air conditioning unit 1, outer shell 2, side panel 21, evaporation chamber 3, return air chamber 31, supply air chamber 32, condensation chamber 4, evaporator 5, condensation fan 6, supply air outlet 7, return air outlet 8, fresh air inlet 9, air duct shell 10, side panel 101, fresh air duct 11, first section 111, second section 112, third section 113, evaporator fixing plate 12, partition 13.

[0027] It should be noted that the drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0029] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They 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 direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Embodiment 1:

[0032] like Figure 1 As shown, the utility model provides a fresh air duct structure, which is installed inside an air conditioning unit 1. The air conditioning unit 1 includes a shell 2, in which an evaporation chamber 3 and a condensation chamber 4 are separated. The evaporation chamber 3 and the condensation chamber 4 are arranged in a left-right arrangement inside the shell 2. An evaporator 5 and an evaporation fan (not shown in the figure) are installed in the evaporation chamber 3, and a compressor, a condenser (not shown in the figure), a condensation fan 6, etc. are installed in the condensation chamber 4.

[0033] Furthermore, the evaporator fixing plate 12 is used to separate the return air chamber 31 and the supply air chamber 32 in the evaporation chamber 3. The return air chamber 31 and the supply air chamber 32 are located at the air inlet side and the air outlet side of the evaporator 5, and the evaporation fan is installed in the supply air chamber 32. The housing 2 of the supply air chamber 32 is provided with an air supply port 7, which can be provided on the bottom plate of the housing 2. The housing 2 of the return air chamber 31 is provided with a return air port 8, which can also be provided on the bottom plate of the housing 2, and the side plate 21 of the housing 2 is provided with a fresh air inlet 9. The return air port 8 is connected to the room through the return air duct, and the supply air port 7 is connected to the room through the supply air duct. Under the action of the evaporation fan, the indoor air enters the return air chamber 31 through the return air port 8, mixes with the fresh air, passes through the evaporator 5, and performs heat exchange with the refrigerant in the evaporator 5. The air after heat exchange in the evaporator 5 flows out from the supply air port 7 and is sent to the room to adjust the temperature and humidity of the indoor environment.

[0034] In this embodiment, the fresh air duct structure includes a duct shell 10, which is used to isolate a circuitous fresh air duct 11 inside the air-conditioning unit 1. One end of the fresh air duct 11 is connected to the fresh air inlet 9. The fresh air inlet 9 and the return air outlet 8 of the return air chamber 31 are respectively arranged in the air outlet side direction and the air inlet side direction of the evaporator 5. The fresh air duct 11 bypasses the air supply chamber 32 and the evaporator 5 and is connected to the return air chamber 31 at the far end.

[0035] Fresh air enters the fresh air duct 11 from the fresh air inlet 9, flows out of the fresh air duct 11 at the far end and enters the return air chamber 31, where it mixes with the indoor air that enters the return air chamber 31 from the return air outlet 8. The mixed air exchanges heat through the evaporator 5 and is finally delivered to the room from the air supply outlet 7 to ensure the freshness of the indoor air.

[0036] In this way, by setting up a circuitous fresh air duct, the flow route length of the fresh air from the fresh air inlet 9 to the return air chamber 31 is extended, so that the wind, sand and rainwater entering from the fresh air inlet 9 can easily settle naturally in the fresh air duct 11 and then be separated, effectively preventing the wind, sand and rainwater from entering the room through the return air port 8, thereby improving the riding comfort. At the same time, after the separation of wind and sand, it is not easy to cause the fresh air filter and the evaporator 5 to be dirty and clogged, which is beneficial to the performance of the air conditioner. After separation, rainwater is not easily brought into the return air port 8, which can effectively avoid water leakage problems when the rain is heavy, affecting the riding experience.

[0037] In this embodiment, it is further preferred that the fresh air inlet 9 is provided on the side plate 21 of the air conditioning unit housing 2 located on the air outlet side of the evaporator 5, the evaporator 5 is perpendicular to the side plate 21 on this side, and the return air port 8 is provided on the bottom plate of the air conditioning unit housing 2 located on the air inlet side of the evaporator 5. In this way, the fresh air duct 11 can bypass the air supply cavity 32 and the evaporator 5 and communicate with the return air cavity 31 at the far end.

[0038] In this embodiment, a fresh air filter and a rainwater separator (not shown in the figure) are installed at the fresh air inlet 9 to filter most of the dust and rainwater in the outdoor fresh air. More preferably, a sand discharge hole and / or a drainage hole (not shown in the figure) are also provided on the bottom plate of the fresh air duct 11 to further discharge a small amount of sand, dust and rainwater entering the fresh air duct 11 to the outside of the air conditioning unit 1 through the sand discharge hole and / or the drainage hole at the bottom of the air conditioning unit 1 after natural sedimentation through the circuitous fresh air duct 11, so as to avoid entering the return air chamber 31 and entering the room through the return air port 8.

[0039] In this embodiment, the air duct housing 10 is surrounded by side panels 101, a bottom plate and a top plate (not shown in the figure), and more preferably, the bottom plate and the top plate (not shown in the figure) of the housing 2 of the air conditioning unit 1 are used as the bottom plate and the top plate of the fresh air duct 11, and the side panels 101 of the air duct housing 10, the evaporator fixing plate 12 and the side panels 21 of the housing 2 of the air conditioning unit are used to surround the air supply cavity 32, and the air supply port 7 is opened on the bottom plate of the housing 2 of the air conditioning unit between the fresh air duct 11 and the evaporator 5. This is conducive to further simplifying the internal structure of the air conditioning unit 1, reducing costs and manufacturing difficulty.

[0040] In this embodiment, the circuitous fresh air duct 11 is C-shaped, including a first section 111 parallel to the evaporator 5, a second section 112 perpendicular to the evaporator 5, and a third section 113 parallel to the evaporator 5 at the far end. The near end of the first section 111 is connected to the fresh air inlet 9, and the far end of the third section 113 is connected to the return air chamber 31. In this way, not only can the circuitous fresh air duct 11 be arranged in the evaporation chamber 3, but also the internal structure of the air conditioning unit 1 is more compact, reducing the cost.

[0041] In the present embodiment, further, since the fresh air duct 11 bypasses the evaporator 5 and bends toward the return air chamber 31, a side panel of the second section 112 is adjacent to the condensation chamber 4, and the side panel of the second section 112 can also directly utilize the partition 13 between the evaporation chamber 3 and the condensation chamber 4, thereby making the structure of the air-conditioning unit 1 simpler.

[0042] The fresh air duct 11 adopts the above-mentioned C-shaped structure, which can effectively extend the length of the fresh air flow route in the evaporation chamber 3, so that the dust and rainwater entering the fresh air duct 11 can be fully naturally settled, and the wind, sand and rainwater are effectively and thoroughly separated, avoiding the clogging of the fresh air filter and the evaporator, and at the same time preventing the rainwater from being brought into the return air port 8 after separation, affecting the riding experience.

[0043] After the fresh air enters the fresh air duct 11 from the fresh air inlet 9, it first passes through the first section 111 parallel to the evaporator 5. Since the length of the first section 111 is relatively long (greater than the length of the evaporator 5), when most of the sand and rainwater have been filtered and separated by the fresh air filter and rainwater separator at the fresh air inlet 9, the small amount of sand and rainwater entering the fresh air duct 11 can be naturally settled when flowing through the first section 111, and all the sand and rainwater can be separated in the first section 111. Therefore, in order to simplify the structure of the air conditioning unit 1, the sand discharge holes and the water discharge holes are centrally arranged on the bottom plate of the first section 111.

[0044] Embodiment 2:

[0045] In this embodiment, an air conditioning unit is provided, including a housing 2, an evaporation chamber 3 and a condensation chamber 4 are arranged in the housing 2, and the evaporation chamber 3 and the condensation chamber 4 are arranged in a left-right arrangement in the housing 2. An evaporator 5 and an evaporation fan (not shown in the figure) are installed in the evaporation chamber 3, and a compressor, a condenser (not shown in the figure), a condensation fan 6, etc. are installed in the condensation chamber 4.

[0046] A fresh air duct structure as described in the first embodiment is installed in the evaporation chamber 3 .

[0047] Embodiment three:

[0048] In the present embodiment, an air conditioning unit is provided. Further, two evaporators 5 are installed in the evaporation chamber 3. The two evaporators 5 are arranged in parallel. Corresponding to the two evaporators 5, two air supply chambers 32 and two return air chambers 31 are provided. Air supply ports 7 are respectively provided in the two air supply chambers 32, and return air ports 8 are respectively provided in the two return air chambers 31.

[0049] The fresh air inlet 9 is arranged on the side plate 21 of the housing 2 between the two evaporators 5, and the side plate 21 is perpendicular to the two evaporators 5. The fresh air duct 11 passes through the two evaporators 5, and then bends toward the return air chamber 31 on both sides, which is equivalent to merging the two C-shaped fresh air ducts 11 into one duct at the first section 111. The space between the two evaporators 5 is divided into two air supply chambers 32 by the fresh air duct 11. Such a structural design is conducive to simplifying the structure of the air conditioning unit 1 and reducing costs.

[0050] The utility model extends the flow path length of the fresh air from the fresh air inlet to the return air chamber by setting a circuitous fresh air duct, so that the wind, sand and rain water entering from the fresh air inlet can be easily settled naturally in the fresh air duct and then separated, effectively preventing the wind, sand and rain water from entering the room through the return air port, thereby improving the riding comfort.

[0051] The utility model realizes the effective and thorough separation of wind, sand and rainwater by setting up a circuitous fresh air duct. After the separation of wind and sand, it is not easy to cause the fresh air filter and the evaporator to be dirty and clogged, which is beneficial to the performance of the air conditioner. At the same time, after the separation, the rainwater is not easily brought into the return air outlet, which avoids the problem of water leakage when the rain is heavy and improves the riding experience.

[0052] The above is only a preferred embodiment of the present invention, and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents suggested above without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the present invention.

Claims

1. A fresh air duct structure, characterized in that: It includes an air duct shell, which isolates a circuitous fresh air duct inside the air-conditioning unit. One end of the fresh air duct is connected to the fresh air inlet. The fresh air inlet and the return air outlet of the return air chamber are respectively arranged in the air outlet side direction and the air inlet side direction of the evaporator. The fresh air duct bypasses the air supply chamber and the evaporator and is connected with the return air chamber at the far end.

2. The fresh air duct structure according to claim 1 is characterized in that: The fresh air inlet is opened on the side panel of the air conditioning unit shell located on the air outlet side of the evaporator, the evaporator is perpendicular to the side panel, and the return air port is opened on the bottom plate of the air conditioning unit shell located on the air inlet side of the evaporator.

3. The fresh air duct structure according to claim 1 is characterized in that: A fresh air filter and a rainwater separator are installed at the fresh air inlet.

4. The fresh air duct structure according to claim 1 is characterized in that: The air duct housing is surrounded by side plates, a bottom plate and a top plate, and sand discharge holes and / or water discharge holes are arranged on the bottom plate.

5. The fresh air duct structure according to claim 4 is characterized in that: The bottom plate and top plate of the air conditioner shell are used as the bottom plate and top plate of the air duct shell, and the side plates of the air duct shell, the evaporator fixing plate and the side plates of the air conditioner shell are used to enclose the air supply cavity.

6. The fresh air duct structure according to any one of claims 1 to 5, characterized in that: The circuitous fresh air duct is C-shaped, including a first section parallel to the evaporator, a second section perpendicular to the evaporator, and a third section parallel to the evaporator at the far end. The proximal end of the first section is connected to the fresh air inlet, and the far end of the third section is connected to the return air chamber.

7. The fresh air duct structure according to claim 6 is characterized in that: Sand removal holes and / or drainage holes are provided on the bottom plate of the first section of the fresh air duct.

8. An air conditioning unit, comprising a housing, characterized in that: An evaporation chamber and a condensation chamber are provided in the shell, and a fresh air duct structure as claimed in any one of claims 1 to 7 is installed in the evaporation chamber.

9. The air conditioning unit according to claim 8, characterized in that: Two evaporators are installed in the evaporation chamber, the fresh air inlet is arranged on the shell side plate between the two evaporators, and the circuitous fresh air duct passes between the two evaporators and then bends and extends toward the return air chambers on both sides.

10. The air conditioning unit according to claim 8, characterized in that: An air supply port is provided on the bottom plate of the shell between the fresh air duct and the evaporator.

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