Automobile rear air conditioner HVAC assembly and air outlet method

Abstract

The invention discloses an automobile rear air conditioner HVAC assembly and an air outlet method.The automobile rear air conditioner HVAC assembly comprises an air conditioner shell (3), an air blower assembly (1), an evaporator assembly (4), an air PTC (5) and a mixed air door operating mechanism (6) are arranged in the air conditioner shell (3), and an air outlet (8) is formed in the air conditioner shell (3); the evaporator assembly (4) is arranged on one side of the air blower assembly (1), the mixed air door operation mechanism (6) is arranged on one side of the evaporator assembly (4), and the air PTC (5) is arranged on one side of the mixed air door operation mechanism (6). And a cold and hot air mixing structure (10) is arranged in the air conditioner shell (3), is arranged on one side of the air PTC (5), and is arranged between the mixed air door operating mechanism (6) and the air outlet (8). Cold air and hot air are neutralized through a limited space, it is guaranteed that the air outlet temperature is uniform, and comfort of passengers is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile parts, and in particular, relates to an automobile rear air-conditioning HVAC assembly and an air outlet method. Background Art

[0002] HVAC (Healing, Ventilation and Air Conditioning) refers to heating, ventilation and air conditioning. The HVAC system is a control system that includes temperature, humidity, air cleanliness and air circulation. The HVAC assembly of the air conditioning system is one of the major assembly components of the automotive air conditioning system. Its main functions include ventilation, air exchange, evaporative cooling, heating, blowing mode adjustment and cooling temperature adjustment.

[0003] At present, in the field of automotive rear air conditioning, the layout of automotive air conditioning is relatively demanding due to the limited space for rear air conditioning layout. Since the HVAC space after the entire vehicle is arranged is small, the rear air conditioning box assembly on the market does not have a mixed air structure, and the air outlet temperature uniformity is poor, which affects the comfort of passengers in the rear seat of the car.

[0004] The inventor's search revealed an HVAC assembly for a center-mounted automotive air conditioner, application number CN202410061850.6, published on April 19, 2024. The assembly includes a distributor volute with a baffle structure within it, and a mixing damper control structure mounted on the baffle structure. While this invention achieves both ventilation and temperature control functions for the automotive air conditioner, it lacks a mixing structure, resulting in poor air temperature uniformity, impacting rear passenger comfort. Summary of the Invention

[0005] The present invention is made to solve the above-mentioned problems. Its purpose is to provide an automobile rear air conditioning HVAC assembly and air outlet method that can evenly mix the cold air and hot air from the air conditioner and blow it out in a limited space, so as to solve the problem of poor temperature uniformity of the air outlet from the automobile rear air conditioner.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A rear air conditioning HVAC assembly for an automobile includes an air conditioning housing, wherein a blower assembly, an evaporator assembly, an air PTC and a mixing damper operating mechanism are arranged in the air conditioning housing, and an air outlet is provided on the air conditioning housing; the evaporator assembly is arranged on one side of the blower assembly, the mixing damper operating mechanism is arranged on one side of the evaporator assembly, and the air PTC is arranged on one side of the mixing damper operating mechanism; a hot and cold air mixing structure is provided in the air conditioning housing, the hot and cold air mixing structure is arranged on one side of the air PTC, and the hot and cold air mixing structure is arranged between the mixing damper operating mechanism and the air outlet.

[0008] The hot and cold air mixing structure includes an air guide plate, an air guide vane, a side plate and a connecting strip. The two ends of the connecting strip are respectively connected to the side plate, the two ends of the air guide vane are respectively connected to the connecting strip, and the air guide plate is connected to the air guide vane.

[0009] A mixing air duct is formed between the adjacent air guide plates. A cold air inlet is provided on the side opposite to the mixing air duct and the mixing air door operating mechanism, a hot air inlet is provided on the side opposite to the mixing air duct and the air PTC, and a mixing air outlet is provided on the side opposite to the mixing air duct and the air outlet.

[0010] The side panels are provided with positioning pins, and the side panels are connected to the air conditioner housing via the positioning pins.

[0011] The air guide pieces are triangular plate structures and are evenly arranged on the connecting strips.

[0012] The air guide plate is a trapezoidal plate structure, and a guide cone is provided at one end of the air guide plate away from the air guide piece.

[0013] The connecting strip is a long strip structure, and there is one connecting strip connected to one end of the air guide plate; there are two connecting strips connected to the other end of the air guide plate; and the side plate is a triangular plate structure.

[0014] The mixing damper operating mechanism includes a first motor, a cold air damper, a hot air damper and a mixing damper connecting rod. The first motor is arranged in the middle of the air-conditioning shell. The rotating shaft of the cold air damper is connected to the output shaft of the first motor. One end of the mixing damper connecting rod is connected to the rotating shaft of the cold air damper, and the other end of the mixing damper connecting rod is connected to the plate rib of the hot air damper.

[0015] The air outlet includes a face-blowing air outlet and a foot-blowing air outlet. A first temperature sensor is provided at the air inlet of the blower assembly, a second temperature sensor is provided at the face-blowing air outlet, and a third temperature sensor is provided at the foot-blowing air outlet.

[0016] A method for discharging air from a rear air conditioner of a vehicle, specifically comprising: sucking air into a sealed space formed by an air conditioner casing through a blower assembly, and dividing the air into two after passing through an evaporator assembly. One part is heated by an air PTC and enters from the side opposite to the air outlet surface of an air guide vane and the air PTC, and the other part enters directly through the side opposite to the air guide vane and a mixing damper operating mechanism. After the hot air and the cold air are mixed in a mixing duct, they are discharged from the side opposite to the air guide vane and the air outlet, and then the air is discharged through the face-blowing air outlet and the foot-blowing air outlet. A first temperature sensor detects the temperature at the air inlet of the blower assembly, and a second temperature sensor and a third temperature sensor detect the temperature at the air outlet. When the temperature at the air outlet does not match a preset temperature, the mixing damper operating mechanism controls the temperature of the air outlet by controlling the opening ratio of the cold air damper and the hot air damper.

[0017] The technical effects of the present invention are as follows: the present invention provides an automobile rear air-conditioning HVAC assembly and an air outlet method, the automobile rear air-conditioning HVAC assembly includes a blower assembly, a speed control module, an air-conditioning housing, an evaporator assembly, an air PTC, a mixing damper operating mechanism, a mode damper operating mechanism, a cold and hot air mixing structure and a temperature sensor; the present invention adds a cold and hot air mixing structure, which is relatively compact and can be installed in the air-conditioning housing of the automobile rear air-conditioning without affecting the operation of other components; the cold and hot air mixing structure can neutralize the cold air and hot air with different mixing damper openings, ensure the uniformity of the air outlet temperature, and ensure the comfort of the rear passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] This manual includes the following drawings, which show the following contents:

[0019] Figure 1 This is a schematic diagram of the interior of an automotive rear air conditioning HVAC assembly according to the present invention;

[0020] Figure 2 This is an overall schematic diagram of an automotive rear air conditioning HVAC assembly according to the present invention;

[0021] Figure 3 This is a schematic diagram of a hot and cold air mixing structure in a rear air conditioner HVAC assembly of an automobile according to the present invention;

[0022] Figure 4 This is a schematic diagram of a hot and cold air mixing structure in a rear air conditioner HVAC assembly of an automobile according to the present invention;

[0023] Figure 5 This is a schematic structural diagram of an evaporator assembly in an automotive rear air conditioning HVAC assembly according to the present invention;

[0024] Figure 6 This is a bottom view of a mixing damper operating mechanism in a rear air conditioner HVAC assembly of an automobile according to the present invention;

[0025] Figure 7This is a side view of a mixing damper operating mechanism in an automotive rear air conditioning HVAC assembly according to the present invention;

[0026] Figure 8 This is a schematic structural diagram of a mode damper operating mechanism of a rear air conditioner HVAC assembly of an automobile according to the present invention;

[0027] The following are marked in the figure:

[0028] 1. Blower assembly, 2. Speed ​​control module, 3. Air conditioner housing, 4. Evaporator assembly, 41. Evaporation chamber, 42. Flat tube, 43. Fin, 44. Drain pipe, 45. Refrigerant pipe, 46. Expansion valve, 5. Air PTC, 6. Mixing damper operating mechanism, 61. First motor, 62. Cold air damper, 63. Hot air damper, 64. Mixing damper connecting rod, 7. Mode damper operating mechanism, 71. Second motor, 72. First transmission gear, 73. Second transmission gear, 74 , mode damper, 75, driving rod, 8, air outlet, 81, face air outlet, 82, foot air outlet, 10, hot and cold mixed air structure, 101, air guide plate, 102, air guide vane, 103, positioning pin, 103 positioning pin, 105, side panel, 106, connecting strip, 107, cold air inlet, 108, hot air inlet, 109, mixed air outlet, 11, temperature sensor, 111, first temperature sensor, 112, second temperature sensor, 113, third temperature sensor. DETAILED DESCRIPTION

[0029] The following is a further detailed description of the specific implementation methods of the present invention through the description of the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and to facilitate their implementation.

[0030] like Figure 1 and Figure 2 As shown, a rear air conditioning HVAC assembly for an automobile includes an air conditioning housing 3, in which a blower assembly 1, an evaporator assembly 4, an air PTC 5 and a mixing damper operating mechanism 6 are arranged. An air outlet 8 is provided on the air conditioning housing 3; the evaporator assembly 4 is arranged on one side of the blower assembly 1, the mixing damper operating mechanism 6 is arranged on one side of the evaporator assembly 4, and the air PTC 5 is arranged on one side of the mixing damper operating mechanism 6; a hot and cold air mixing structure 10 is provided in the air conditioning housing 3, and the hot and cold air mixing structure 10 is arranged on one side of the air PTC 5, and the hot and cold air mixing structure 10 is arranged between the mixing damper operating mechanism 6 and the air outlet 8.

[0031] The automotive rear air conditioning HVAC assembly draws air into the sealed space formed by the air conditioning housing 3 via a blower assembly 1. This air then flows through the air duct within the housing 3 and into the evaporator assembly 4, where it is cooled and then output. At this point, the air is split into two by a mixing damper mechanism 6. One portion of the air is heated by an air PTC 5, and the hot air is then blown through the air duct within the housing 3 to a cold / hot air mixing structure 10. The remaining cold air flows directly to the cold / hot air mixing structure 10 without passing through the PTC. The cold and hot air are mixed in the cold / hot air mixing structure 10, achieving a uniform outlet temperature and ensuring airflow uniformity, thereby enhancing the comfort of rear passengers.

[0032] like Figure 3 and Figure 4 As shown, the hot and cold air mixing structure 10 includes an air guide plate 101, air guide vanes 102, side panels 105, and a connecting strip 106. The ends of the connecting strip 106 are respectively connected to the side panels 105, and the ends of the air guide vanes 102 are respectively connected to the connecting strip 106. The air guide plate 101 is connected to the air guide vanes 102. The hot and cold air mixing structure 10 is compact and simple in structure and can be installed in the limited space of the air conditioner housing 3.

[0033] like Figure 3 and Figure 4 As shown, adjacent air guides 102 form a mixing duct. Cold air and hot air enter the mixing duct and mix before being discharged. The side of the mixing duct opposite the mixing damper operating mechanism 6 is the cold air inlet 107, the side of the mixing duct opposite the air outlet surface of the air PTC 5 is the hot air inlet 108, and the side of the mixing duct opposite the air outlet 8 is the mixed air outlet 109.

[0034] like Figure 3 and Figure 4 As shown, a positioning pin 103 is provided on the side panel 105, and the side panel 105 is connected to the air conditioning housing 3 through the positioning pin 103. The hot and cold air mixing structure 10 is fixedly installed in the air conditioning housing 3 through the positioning pin 103, which can ensure the installation strength of the hot and cold air mixing structure 10 and improve the stability of the overall structure.

[0035] like Figure 3 and Figure 4 As shown, the air guide blades 102 are triangular plate structures and are evenly arranged on the connecting strips 106. The cold and hot air mixing structure 10 is in the shape of a triangular prism. The cold air and hot air enter from two directions respectively, and are finally mixed and blown out through one surface. The cold and hot air mixing structure 10 mixes the air evenly and has a reliable structure.

[0036] like Figure 3 and Figure 4As shown, the air guide plate 101 is a trapezoidal plate structure, and a guide cone is provided at one end of the air guide plate 101 away from the air guide piece 102. The guide cone provided on the air guide plate 101 can better limit the wind direction and improve the air mixing effect of the hot and cold air mixing structure 10.

[0037] like Figure 3 and Figure 4 As shown, the connecting strip 106 is a long strip structure, with one connecting strip 106 connected to one end of the air guide 102; two connecting strips 106 are connected to the other end of the air guide 102; and the side plate 105 is a triangular plate structure. The cold and hot air mixing structure 10 has a simple structure, is easy to manufacture, and can save costs.

[0038] like Figure 6 and Figure 7 As shown, the mixing door operating mechanism 6 includes a first motor 61, a cold air door 62, a hot air door 63, and a mixing door connecting rod 64. The first motor 61 is disposed in the middle of the air conditioning housing 3. The rotating shaft of the cold air door 62 is connected to the output shaft of the first motor 61. One end of the mixing door connecting rod 64 is connected to the rotating shaft of the cold air door 62, and the other end of the mixing door connecting rod 64 is connected to the plate reinforcement of the hot air door 63. The rotation of the output shaft of the first motor 61 can drive the rotation of the cold air door 62, and the rotation of the cold air door 62 drives the movement of the mixing door connecting rod 64. The mixing door connecting rod 64 can control the rotation of the hot air door 63. The opening and closing of the cold air door 62 and the hot air door 63 can control the ratio of cold and hot air entering the cold and hot air mixing structure 10, thereby achieving control of the temperature of the conditioned air.

[0039] like Figure 1 and Figure 2 As shown, the air outlet 8 includes a face outlet 81 and a foot outlet 82. A first temperature sensor 111 is provided at the air inlet of the blower assembly 1, a second temperature sensor 112 is provided at the face outlet 81, and a third temperature sensor 113 is provided at the foot outlet 82. The provision of the face outlet 81 and the foot outlet 82 enhances passenger comfort. The use of multiple temperature sensors allows users to quickly and accurately adjust the target temperature, increasing passenger satisfaction.

[0040] A method for discharging air from a rear air conditioner of a car, specifically, comprising: sucking air into a sealed space formed by an air-conditioning casing 3 through a blower assembly 1, and dividing the air into two after passing through an evaporator assembly 4. One part is heated by an air PTC 5 and enters from the side opposite to the air outlet surface of the air PTC 5 and the other part enters directly through the side opposite to the air guide 102 and the mixing damper operating mechanism 6. After the hot air and the cold air are mixed, they are discharged from the side opposite to the air guide 102 and the air outlet 8, and then the air is discharged through the face-blowing air outlet 81 and the foot-blowing air outlet 82. A first temperature sensor 111 detects the temperature at the air inlet of the blower assembly 1, and a second temperature sensor 112 and a third temperature sensor 113 detect the temperature of the air outlet 8. When the temperature of the air outlet 8 does not match the preset temperature, the mixing damper operating mechanism 6 controls the temperature of the air outlet 8 by controlling the opening ratio of the cold air damper 62 and the hot air damper 63.

[0041] like Figure 1 As shown, a speed control module 2 is installed within the air conditioner housing 3 and is located on one side of the blower assembly 1. This module controls the wind speed, improving passenger satisfaction. Air is drawn into the sealed space formed by the air conditioner housing 3 by the blower assembly 1. The air then passes through the speed control module 2, dissipating heat and extending its service life.

[0042] like Figure 1 and Figure 5 As shown, the evaporator assembly 4 includes an evaporation chamber 41, flat tubes 42, fins 43, a drain pipe 44, a refrigerant conduit 45 and an expansion valve 46. The evaporation chamber 41 is connected through the flat tubes 42, the fins 43 are arranged between the flat tubes 42, one end of the refrigerant conduit 45 is connected to the evaporation chamber 41, and the other end of the refrigerant conduit 45 is connected to the expansion valve 46, and the drain pipe 44 is connected to the expansion valve 46.

[0043] The refrigerant enters the evaporation chamber 41 through the refrigerant conduit 45, flows through the flat tubes 42 to the next evaporation chamber 41, then flows through the flat tubes 42 to the original evaporation chamber 41, and finally exits through the refrigerant conduit 45. The air drawn into the air conditioner housing 3 by the blower assembly 1 passes through the gaps between the flat tubes 42. The refrigerant in the flat tubes 42 removes heat from the air, thereby cooling the air. Fins 43 are provided between the flat tubes 42 to slow the air flow through the evaporator assembly 4, improving the cooling effect. A drain pipe 44 is provided to promptly drain condensed water, extending the service life of the evaporator assembly 4.

[0044] like Figure 1 and Figure 7As shown, a mode damper operating mechanism 7 is provided within the air conditioning housing 3. The mode damper operating mechanism 7 is disposed on one side of the air mixing outlet 109. The mode damper operating mechanism 7 includes a second motor 71, a first transmission gear 72, a second transmission gear 73, a mode damper 74, and a drive rod 75. The second transmission gear 73 is connected to the output shaft of the second motor 71, the first transmission gear 72 is coaxially connected to the drive rod 75, the first transmission gear 72 and the second transmission gear 73 cooperate, and the mode damper 74 is connected to the drive rod 75. Rotation of the mode damper 74 can adjust the air flow ratio between the face air outlet 81 and the foot air outlet 82, thereby further improving passenger comfort.

[0045] Functions and Effects of the Embodiments

[0046] Air is drawn into the sealed space formed by the air conditioner housing 3 through the blower assembly 1. The air passes through the speed control module 2 to dissipate heat for the speed control module 2, and then passes through the evaporator assembly 4 to cool the air. At this time, the air is divided into two parts by the mixing damper operating mechanism 6. One part passes through the air PTC 5, which heats the passing air. The hot air is then sent to the hot and cold air mixing structure 10 through the hot air inlet 108. The other part does not pass through the air PTC 5 and directly enters the hot and cold air mixing structure 10 through the cold air inlet 107. After being mixed in the hot and cold air mixing structure 10, the air is discharged through the mixed air outlet 109 to achieve uniform temperature. The air outlet ratio of the face-blowing air outlet 81 and the foot-blowing air outlet 82 is adjusted by the mode damper operating mechanism 7. The hot and cold air mixing structure 10 is compactly designed and can be installed in the limited space of the air conditioner housing 3. The present invention has a simple structure and high reliability. The hot and cold air mixing structure 10 is provided to ensure the uniformity of the outlet air temperature and the comfort of the passengers. The first temperature sensor 111 detects the temperature at the air inlet of the blower assembly 1, and the second temperature sensor 112 and the third temperature sensor 113 detect the temperature of the air outlet 8. When the temperature of the air outlet 8 does not match the preset temperature, the mixing damper operating mechanism 6 controls the temperature of the air outlet 8 by controlling the opening ratio of the cold air damper 62 and the hot air damper 63, so that the user can adjust to the target temperature and increase customer satisfaction.

[0047] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described method. Any non-substantial improvements made using the method concepts and technical solutions of the present invention, or any direct application of the above-described concepts and technical solutions to other situations without modification, fall within the scope of protection of the present invention.

Claims

1. A rear air conditioning HVAC assembly for an automobile, comprising an air conditioning housing (3), wherein a blower assembly (1), an evaporator assembly (4), an air PTC (5) and a mixing door operating mechanism (6) are arranged in the air conditioning housing (3), and an air outlet (8) is provided on the air conditioning housing (3); the evaporator assembly (4) is arranged on one side of the blower assembly (1), the mixing door operating mechanism (6) is arranged on one side of the evaporator assembly (4), and the air PTC (5) is arranged on one side of the mixing door operating mechanism (6); and the following features are provided: A hot and cold air mixing structure (10) is provided in the air conditioning housing (3), the hot and cold air mixing structure (10) is provided on one side of the air PTC (5), and the hot and cold air mixing structure (10) is provided between the mixing damper operating mechanism (6) and the air outlet (8).

2. The automotive rear air conditioning HVAC assembly according to claim 1, characterized in that: The hot and cold air mixing structure (10) comprises an air guide plate (101), an air guide vane (102), a side plate (105) and a connecting strip (106); the two ends of the connecting strip (106) are respectively connected to the side plate (105); the two ends of the air guide vane (102) are respectively connected to the connecting strip (106); and the air guide plate (101) is connected to the air guide vane (102).

3. The automotive rear air conditioning HVAC assembly according to claim 2, characterized in that: A mixing air duct is formed between the adjacent air guide plates (102), a cold air inlet (107) is provided on the side opposite to the mixing air duct and the mixing air door operating mechanism (6), a hot air inlet (108) is provided on the side opposite to the mixing air duct and the air PTC (5), and a mixing air outlet (109) is provided on the side opposite to the mixing air duct and the air outlet (8).

4. The automotive rear air conditioning HVAC assembly according to claim 2 or 3, characterized in that: A positioning pin (103) is provided on the side plate (105), and the side plate (105) is connected to the air conditioner housing (3) via the positioning pin (103).

5. The automotive rear air conditioning HVAC assembly according to claim 2 or 3, characterized in that: The air guide pieces (102) are triangular plate structures, and the air guide pieces (102) are evenly arranged on the connecting strips (106).

6. The automotive rear air conditioning HVAC assembly according to claim 2 or 3, characterized in that: The air guide plate (101) is a trapezoidal plate structure, and a guide cone is provided at one end of the air guide plate (101) away from the air guide piece (102).

7. The automotive rear air conditioning HVAC assembly according to claim 2 or 3, characterized in that: The connecting strip (106) is a long strip structure, and there is one connecting strip (106) connected to one end of the air guide plate (102); there are two connecting strips (106) connected to the other end of the air guide plate (102); and the side plate (105) is a triangular plate structure.

8. The automotive rear air conditioning HVAC assembly according to any one of claims 1 to 3, characterized in that: The mixing damper operating mechanism (6) comprises a first motor (61), a cold air damper (62), a hot air damper (63) and a mixing damper connecting rod (64); the first motor (61) is arranged in the middle of the air-conditioning housing (3); the rotating shaft of the cold air damper (62) is connected to the output shaft of the first motor (61); one end of the mixing damper connecting rod (64) is connected to the rotating shaft of the cold air damper (62); and the other end of the mixing damper connecting rod (64) is connected to the plate rib of the hot air damper (63).

9. The automotive rear air conditioning HVAC assembly according to claim 1, characterized in that: The air outlet (8) comprises a face-blowing air outlet (81) and a foot-blowing air outlet (82); a first temperature sensor (111) is provided at the air inlet of the blower assembly (1); a second temperature sensor (112) is provided at the face-blowing air outlet (81); and a third temperature sensor (113) is provided at the foot-blowing air outlet (82).

10. A method for discharging air from a rear air conditioner of an automobile, implemented using the automobile rear air conditioner HVAC assembly according to any one of claims 1 to 9, characterized in that: Specifically: The air is sucked into the sealed space formed by the air conditioner housing (3) through the blower assembly (1). The air passes through the evaporator assembly (4) and is divided into two parts. One part is heated by the air PTC (5) and enters from the side opposite to the air outlet surface of the air PTC (5). The other part enters directly from the side opposite to the air guide (102) and the mixing damper operating mechanism (6). The hot air and the cold air are mixed in the mixing duct and discharged from the side opposite to the air guide (102) and the air outlet (8). The air is discharged and then discharged through the face-blowing air outlet (81) and the foot-blowing air outlet (82); the first temperature sensor (111) detects the temperature at the air inlet of the blower assembly (1), the second temperature sensor (112) and the third temperature sensor (113) detect the temperature of the air outlet (8); when the temperature of the air outlet (8) does not match the preset temperature, the mixing damper operating mechanism (6) controls the temperature of the air outlet (8) by controlling the opening ratio of the cold air damper (62) and the hot air damper (63).

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