Electric motor coach air conditioner evaporator

Abstract

The utility model provides an air conditioning evaporator of an electric motor coach. The air conditioning evaporator comprises a shell, a return air inlet is formed in the top of the shell, access holes are formed in the two sides of the shell, access covers are arranged on the access holes, an air outlet is formed in the front face of the shell, and an evaporator core is arranged in the shell. The bottom of the shell is obliquely arranged, the two ends of the shell are high, the middle of the shell is low, a water falling opening is formed in the bottom of the center of the shell, the water falling opening is communicated with the interior of the shell, a plurality of water guiding grooves are formed in the bottom wall of the shell, the water guiding grooves are evenly distributed at equal intervals, and heating wires are arranged in the water guiding grooves. Condensed water drops on the bottom of the shell, the two ends of the bottom of the shell are high, the center of the shell is low, the water falling opening is formed in the center, the water guide grooves are fully distributed in the bottom wall of the shell, and the condensed water flows to the bottom of the shell along the water guide grooves and is finally discharged from the water falling opening, so that condensed water residues are effectively avoided, and condensed water mildewing and corrosion to the evaporator are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioner evaporators, in particular to an air conditioner evaporator for electric buses. Background Art

[0002] An air conditioner evaporator is a type of evaporator. The function of an air conditioner evaporator is to utilize the fact that a liquid low-temperature refrigerant is easy to evaporate under low pressure, transform into vapor and absorb the heat of the cooled medium to achieve the refrigeration purpose. Currently, in the market and in the industry, most electric buses use integrated roof-mounted air conditioners.

[0003] The existing Chinese patent document CN201921343108.5 discloses a double inner roof-mounted evaporator air conditioning system for small pure electric buses, including left and right air ducts on the top of the bus. It is characterized in that: it further includes an evaporator assembly, a condenser and a pure voltage compressor. An evaporator assembly is respectively arranged at the front end inside the left and right air ducts on the top of the bus, and the air outlet of the evaporator assembly is connected to the air inlet of the air duct. The condenser is arranged at the head of the bus and is integrally arranged with the motor water tank of the bus. The compressor is arranged on the chassis of the bus. The compressor, the condenser and the evaporator assembly are connected by refrigerant pipelines and circuits to form an air conditioning system. The utility model solves the problems caused by the use of a roof-mounted pure electric air conditioning system for small pure electric buses, such as the increase in vehicle weight and height, and the difficulty in manufacturing the appearance shape. While ensuring the refrigeration capacity of the air conditioning system, it not only effectively reduces the air volume loss caused by the air duct transfer of the traditional built-in air conditioner, but also effectively reduces the air conditioning noise.

[0004] However, there are certain defects in the use of the above patent. In summer, the humidity is relatively high, and the air contains a large amount of water vapor. When it encounters the evaporator, condensate will be generated. The condensate of this device will accumulate in it, and after a long time, it will cause internal corrosion and the water will ferment to produce peculiar smell, thereby reducing the service life of the device.

[0005] Therefore, an air conditioner evaporator for electric buses is proposed here to solve the above problems. Summary of the Utility Model

[0006] In order to overcome the deficiencies of the prior art, the utility model provides an air conditioner evaporator for electric buses.

[0007] The utility model is realized by adopting the following technical solutions:

[0008] An air conditioner evaporator for electric buses includes a housing. A return air inlet is provided at the top of the housing. Maintenance openings are provided on both sides of the housing, and maintenance covers are provided on the maintenance openings. An air outlet is provided on the front of the housing. An evaporator core is arranged inside the housing, and the evaporator core is fixed inside the housing;

[0009] The bottom of the housing is inclined, with the two ends being high and the middle being low. A water outlet is provided at the center bottom of the housing, and the water outlet is communicated with the inside of the housing. A plurality of water guide grooves are provided on the bottom wall of the housing, and the water guide grooves are arranged evenly and equidistantly. Heating wires are provided in the water guide grooves.

[0010] The evaporator core includes tube bands, fins, a liquid inlet pipe, a liquid return pipe, and a fixing bracket;

[0011] A plurality of the tube bands are provided and arranged evenly and equidistantly. The tube bands are coiled tubes connected end to end. The head end of the tube band is communicated with the liquid inlet pipe, and the tail end of the tube band is communicated with the liquid return pipe. A high-pressure refrigerant pipe interface is provided on one side wall of the liquid inlet pipe, and a low-pressure refrigerant pipe interface is provided on one side wall of the liquid return pipe. The fins are fixed on the tube bands, and the fins are arranged evenly and equidistantly. The fixing brackets are fixed on both sides of the tube bands, and the evaporator core is fixed inside the housing through the fixing brackets.

[0012] A drying device is provided on one side of the inspection opening. The drying device includes an inspection cover and a drying fan, and the drying fan is fixed on the inner side wall of the inspection cover.

[0013] An air outlet device is provided at the air outlet. The air outlet device includes a housing. A grille is provided on the front surface of the housing. A air supply device is provided inside the housing. The air supply device includes an air supply motor. The air supply motor is a double-shaft motor. Shafts are respectively provided at the output ends of the air supply motor, and wind wheels are provided at the ends of the shafts;

[0014] An installation bracket is provided on the outer peripheral wall of the air supply motor, and the air supply motor is fixed inside the housing through the installation bracket.

[0015] A filter screen is provided on the upper surface of the air return opening, and the filter screen is fixedly connected to the housing through screws.

[0016] The utility model has the following beneficial effects compared with the prior art:

[0017] 1. By setting the bottom of the housing to be inclined, the condensed water drops on the bottom of the housing. Since the two ends of the bottom of the housing are high and the center is low, and a water outlet is provided at the center, the bottom wall of the housing is covered with water guide grooves, and the condensed water flows along the water guide grooves to the bottom of the housing and finally is discharged through the water outlet, effectively avoiding the residue of condensed water, preventing the mildew of condensed water and the corrosion of the evaporator;

[0018] 2. To further prevent incomplete drainage of internal condensate, a heating wire is installed in the water guide groove and a drying device is set up. The heating wire is activated to heat the residual water in the water guide groove, which is then heated and evaporated. The drying motor in the drying device is started to assist in accelerating the air circulation inside the housing, and the evaporated water vapor is discharged from the inside of the housing, thereby ensuring the dryness inside the housing and effectively avoiding problems such as mildew and corrosion caused by the inability to drain condensate, and extending the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional structure schematic diagram of the whole of the present utility model;

[0020] Figure 2 is an exploded three-dimensional structure schematic diagram of the whole of the present utility model;

[0021] Figure 3 is a schematic diagram of the evaporator core structure of the present utility model;

[0022] Figure 4 is a sectional structure schematic diagram of the evaporator core of the present utility model;

[0023] Figure 5 is a schematic diagram of the housing structure of the present utility model;

[0024] Figure 6 is a sectional structure schematic diagram of the housing of the present utility model;

[0025] Figure 7 is a schematic diagram of the air supply device structure of the present utility model;

[0026] In the figure: 1. Housing; 11. Air return opening; 12. Air outlet; 13. Maintenance opening; 14. Drainage opening; 15. Water guide groove; 2. Drying device; 21. Drying fan; 3. Air outlet device; 31. Outer shell; 32. Air supply device; 33. Grille; 34. Mounting bracket; 35. Wind wheel; 36. Air supply motor; 5. Filter screen; 6. Evaporator core; 61. Fixed bracket; 62. Tube belt; 63. Liquid inlet pipe; 64. Liquid return pipe; 65. High-pressure refrigerant pipe interface; 66. Low-pressure refrigerant pipe interface; 67. Heat sink. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, in combination with the drawings and specific embodiments, the present utility model will be further described. It should be noted that on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined with each other to form new embodiments.

[0028] The present utility model will be further described below with reference to the drawings.

[0029] As Figures 1 to 7As shown in the figure, an evaporator for an electric bus air conditioner includes a housing 1. The top of the housing 1 is provided with an air return opening 11. Both sides of the housing 1 are provided with maintenance openings 13, and maintenance covers are provided on the maintenance openings 13. The front of the housing 1 is provided with an air outlet 12. An evaporator core 6 is arranged inside the housing 1, and the evaporator core 6 is fixed inside the housing 1.

[0030] The bottom of the housing 1 is inclined, with the two ends being high and the middle being low. A water outlet 14 is provided at the center bottom of the housing 1, and the water outlet 14 is communicated with the inside of the housing 1. A plurality of water guide grooves 15 are provided on the bottom wall of the housing 1, and the water guide grooves 15 are arranged evenly and equidistantly. Heating wires are arranged in the water guide grooves 15. The water outlet 14 is made of stainless steel, effectively enhancing the anti-corrosion performance. Moreover, the plurality of water guide grooves 15 can guide the condensed water, so that the condensed water will not remain at the bottom of the housing 1.

[0031] The evaporator core 6 includes tube bands 62, fins 67, a liquid inlet pipe 63, a liquid return pipe 64, and a fixing bracket 61.

[0032] A plurality of tube bands 62 are provided and arranged evenly and equidistantly. The tube bands 62 are coiled pipes connected end to end. The head end of the tube band 62 is communicated with the liquid inlet pipe 63, and the tail end of the tube band 62 is communicated with the liquid return pipe 64. A high-pressure refrigerant pipe interface 65 is provided on one side wall of the liquid inlet pipe 63, and a low-pressure refrigerant pipe interface 66 is provided on one side wall of the liquid return pipe 64. The fins 67 are fixed on the tube bands 62, and the fins 67 are arranged evenly and equidistantly. The fixing brackets 61 are fixed on both sides of the tube bands 62. The evaporator core 6 is fixed inside the housing 1 through the fixing brackets 61. The tube bands 62 are arranged as a plurality of coiled pipes connected end to end, increasing the travel of the water flow operation and improving the refrigeration effect of the evaporator. The fins 67, on the other hand, increase the contact area with the air, greatly improving the refrigeration effect of the evaporator.

[0033] A drying device 2 is provided on one side of the maintenance opening 13. The drying device 2 includes a maintenance cover and a drying fan 21. The drying fan 21 is fixed on the inner side wall of the maintenance cover. The maintenance cover facilitates the internal maintenance operation, and the drying fan 21 is used to assist in improving the air fluidity inside and enhancing the drying effect.

[0034] An air outlet device 3 is provided at the air outlet 12. The air outlet device 3 includes a housing 31. A grille 33 is provided on the front of the housing 31. A blowing device 32 is arranged inside the housing 31. The blowing device 32 includes a blowing motor 36. The blowing motor 36 is a double-shaft motor. Output shafts are respectively provided at the output ends of the blowing motor 36, and wind wheels 35 are provided at the ends of the output shafts.

[0035] An installation bracket 34 is provided on the outer peripheral wall of the air supply motor 36, and the air supply motor 36 is fixed inside the housing 31 through the installation bracket 34.

[0036] A filter screen 5 is provided on the upper surface of the air return opening 11. The filter screen 5 is fixedly connected to the housing 1 by screws. The filter screen 5 is provided to prevent dust and other impurities in the external air from entering the interior of the housing 1. Moreover, the filter screen 5 is detachable, which is convenient for installation and maintenance and easy to clean.

[0037] The working principle of the present utility model is as follows: When in use, the air supply motor 36 in the air outlet device 3 is started, generating negative pressure inside the housing 1. External air enters the interior of the housing 1 from the air return opening 11. When it contacts the evaporator core 6, the heat dissipation fins 67 and tube belt 62 of the evaporator core 6 cool it down. After being cooled by the evaporator core 6, the cooled air is discharged through the air outlet 12.

[0038] In the air in summer, due to high humidity, it contains a large amount of moisture, and due to high temperature, it will have a condensation reaction with the evaporator core 6. The moisture in the air changes from a gaseous state to a liquid state, thus forming condensate.

[0039] The condensate drips onto the bottom of the housing 1. Since the bottom of the housing 1 is inclined, high at both ends and low in the center, and a water outlet 14 is provided at the center, the bottom wall of the housing 1 is covered with water guide grooves 15. The condensate flows along the water guide grooves 15 to the bottom of the housing 1 and finally is discharged through the water outlet 14.

[0040] After the air conditioner is deactivated, to prevent the internal condensate from not being completely discharged, the heating wire is started to heat. The heating wire heats and evaporates the residual water in the water guide grooves 15. The air drying motor in the air drying device 2 is started to assist in accelerating the air circulation inside the housing 1 and discharging the evaporated water vapor from the interior of the housing 1, thereby ensuring the dryness inside the housing 1, effectively avoiding problems such as mildew and corrosion caused by the inability to discharge condensate, and extending the service life of the device.

[0041] The above embodiments are only the preferred embodiments of the present utility model and cannot be used to limit the scope of protection of the present utility model. Any non-substantial changes and substitutions made by those skilled in the art based on the present utility model fall within the scope of protection required by the present utility model.

Claims

1. An electric bus air conditioner evaporator, comprising a shell, a return air port is provided on the top of the shell, inspection ports are provided on both sides of the shell, an inspection cover is provided on the inspection port, and an air outlet is provided on the front of the shell, characterized in that: An evaporator core is arranged inside the shell, and the evaporator core is fixed inside the shell; The bottom of the shell is tilted, with the two ends higher and the middle lower. A water outlet is provided at the center bottom of the shell, and the water outlet is connected to the inside of the shell. A plurality of water guide grooves are provided on the bottom wall of the shell, and the water guide grooves are evenly and equidistantly arranged. A heating wire is provided in the water guide groove.

2. The electric bus air conditioner evaporator according to claim 1, characterized in that: The evaporator core comprises a tube belt, a heat sink, a liquid inlet pipe, a liquid return pipe and a fixing bracket; The tube belt is provided with multiple ones and arranged evenly and equidistantly. The tube belt is a coil connected end to end. The head end of the tube belt is connected to the liquid inlet pipe, and the tail end of the tube belt is connected to the liquid return pipe. A high-pressure medium pipe interface is provided on one side wall of the liquid inlet pipe, and a low-pressure medium pipe interface is provided on one side wall of the liquid return pipe. The heat sink is fixed on the tube belt, and the heat sink is evenly and equidistantly arranged. The fixing bracket is fixed on both sides of the tube belt, and the evaporator core is fixed to the inside of the shell through the fixing bracket.

3. The electric bus air conditioner evaporator according to claim 2, characterized in that: A drying device is provided on one side of the inspection opening. The drying device comprises an inspection cover and an air-drying fan. The air-drying fan is fixed on the inner side wall of the inspection cover.

4. The electric bus air conditioner evaporator according to claim 3, characterized in that: An air outlet device is provided at the air outlet, the air outlet device comprises a shell, a grille is provided on the front of the shell, an air supply device is provided inside the shell, the air supply device comprises an air supply motor, the air supply motor is a double-shaft motor, a rotating shaft is provided at each output end of the air supply motor, and a wind wheel is provided at the end of the rotating shaft; A mounting bracket is provided on the outer peripheral wall of the air supply motor, and the air supply motor is fixed inside the shell through the mounting bracket.

5. The electric bus air conditioner evaporator according to claim 4, characterized in that: A filter is provided on the upper surface of the return air outlet, and the filter is fixedly connected to the shell by screws.

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