A vehicle air conditioning HVAC assembly

Abstract

This utility model relates to the field of vehicle air conditioning technology. Specifically, this utility model relates to a vehicle air conditioning HVAC assembly, including an HVAC housing (1), in which an evaporator (2), a blower (3), and a heater core (4) are provided; a hot and cold air damper (5) is provided between the blower (3) and the heater core (4); this vehicle air conditioning HVAC assembly can ensure complete adaptation to the original vehicle air duct, reducing development costs; the hot and cold air damper can achieve 30%-70% opening control, thereby achieving precise control of the vehicle interior temperature in spring and autumn; at the same time, through the opening control of the hot and cold air damper, reasonable mixing and stratification of hot and cold air are achieved, with higher foot temperature when blowing on the face and feet, and higher foot temperature when defrosting, ensuring driver comfort.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted air conditioners, and in particular to a vehicle-mounted air conditioner HVAC assembly. Background Art

[0002] HVAC(Heat i ng, Vent il at i on and Air Cond iti on i ng), for heating, ventilation, and air conditioning; the HVAC system is a control system that includes temperature, humidity, air cleanliness, and air circulation; the air conditioning system HVAC assembly is one of the three major assembly components in the automotive air conditioning system. Its main functions include ventilation, air exchange, evaporative cooling, heating, blowing mode adjustment, and cooling temperature adjustment. The existing HVAC solutions installed in vehicles have air dampers that cannot be closed, which makes the driver's operating experience poor. The air dampers that cannot be closed will cause the air volume in other modes to be reduced, affecting the defrosting effect during defrosting and the foot heating effect during foot heating. The hot and cold air dampers of the existing HVAC solutions installed in vehicles have no air mixing function and only have two states: full cold and full hot. In spring and autumn, if cooling is turned on, the compressor will frequently start and stop, and the air outlet temperature will be too low, seriously affecting the driver's comfort. If heating is turned on in spring and autumn, the air outlet temperature will be high, and the temperature inside the vehicle will be high, which will also seriously affect the driver's comfort.

[0003] After searching, the applicant found that the Chinese patent document with publication number CN107813677A disclosed an automatic air conditioning HVAC assembly device on March 20, 2018, including: an air conditioning controller, which collects the physical key values ​​on the controller, performs logical processing, and transmits the logical signal to the air conditioning control box in the form of a LIN signal. At the same time, the air conditioning controller lights up the response indicator light as required; the air conditioning control box, which receives the air conditioning controller instructions through the LIN communication bus, converts them into air conditioning control status, and transmits the control status to the DVD in the form of a CAN bus. The DVD displays the current air conditioning status; an execution device, which is used to take action according to the LIN signal instructions of the air conditioning control box; and a signal sensing module, which is used to collect the external environment status and transmit it to the air conditioning control box.

[0004] The device is not equipped with hot and cold air doors and cannot achieve mixed air operation. Utility Model Content

[0005] The purpose of the utility model is to provide a vehicle air-conditioning HVAC assembly which is provided with hot and cold air doors and can realize air mixing operation.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a vehicle air-conditioning HVAC assembly, including an HVAC shell, in which an evaporator, a blower and a heater core are provided; hot and cold air doors are provided between the blower and the heater core.

[0007] The evaporator is arranged on a side close to the air inlet of the blower, and the hot and cold air doors and the warm air core are both arranged on a side close to the air outlet of the blower.

[0008] A rack is provided on the side of the hot and cold air door; a gear is provided on the side of the hot and cold air door close to the blower outlet, and the rack is meshed with the gear.

[0009] A bypass air duct is provided in the HVAC housing, and the bypass air duct is arranged on a side of the heater core body close to the hot and cold air doors.

[0010] The HVAC shell is provided with a face-blowing air outlet; the face-blowing air outlet is provided with a face-blowing air door; the face-blowing air door is arranged on one side of the warm air core.

[0011] The HVAC housing is provided with a side-blowing surface defrost air outlet and a middle-blowing surface air outlet respectively connected to the blowing surface air outlet; the side-blowing surface defrost air outlet is connected to a side-blowing surface defrost air duct.

[0012] A foot-blowing air vent is provided in the HVAC shell, and a foot-blowing air door is provided on the foot-blowing air vent; the foot-blowing air door is arranged on one side of the warm air core; the foot-blowing air vent is arranged on both sides of the middle blowing surface air vent and is connected to a foot-blowing air duct.

[0013] A defrost air outlet is provided in the HVAC housing; a defrost air door is provided on the defrost air outlet; and a front defrost air outlet and a side defrost horn air duct connected to the defrost air door are provided on the top of the HVAC housing.

[0014] One end of the side-blowing surface side defrost air duct is connected to the side defrost horn air duct; the other end of the side-blowing surface side defrost air duct is provided with a side defrost air duct; a one-way diaphragm is provided between the side defrost air duct and the side-blowing surface side defrost air duct; the front defrost air outlet is connected to the middle defrost air duct.

[0015] The HVAC housing includes an internal circulation air inlet and an external circulation air inlet; an air inlet door panel is provided between the internal circulation air inlet and the external circulation air inlet; and a drain outlet is provided at the bottom of the HVAC housing.

[0016] The beneficial effects of this application are:

[0017] This vehicle-mounted air conditioning HVAC assembly can ensure full adaptation to the original vehicle air duct, reducing development costs; the hot and cold air doors can achieve 30%-70% opening control, thereby achieving precise control of the vehicle interior temperature in spring and autumn; at the same time, through the opening control of the hot and cold air doors, reasonable mixing and stratification of hot and cold air is achieved, and the foot temperature is higher when blowing on the face and feet, and the foot temperature is higher when blowing on the feet during defrosting, ensuring the driver's comfort.

[0018] The vehicle air-conditioning HVAC assembly adopts an air suction method, and the air flow direction is: internal and external circulation air inlet, evaporator, blower, hot and cold air doors, warm air core, each mode air door, each mode air outlet; the evaporator is arranged on the side close to the blower air inlet, the warm air core is arranged at the blower air outlet, and the hot and cold air doors are arranged between the blower air outlet and the warm air core; this arrangement is more conducive to ensuring the uniformity of the wind speed on the evaporator surface, and arranging the warm air core behind the bypass air duct can achieve a better mixed air mode, ensuring that the wind temperature at the head is lower than the wind temperature at the feet during mixed air, meeting the comfort requirements.

[0019] The blower of the vehicle air-conditioning HVAC assembly is detachable. Without removing the entire vehicle dashboard and taking out the entire HVAC assembly, a small shell can be removed from the space under the dashboard, and the blower can be easily pulled out, reducing the after-sales cost of replacing the blower. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0021] Figure 1 This is a cross-sectional view of the vehicle's HVAC assembly.

[0022] Figure 2 This is a schematic diagram of the air duct structure of the vehicle air conditioning HVAC assembly.

[0023] Figure 3 This is a structural diagram of the vehicle air conditioning HVAC assembly.

[0024] Figure 4 This is a schematic diagram of the connection status of the HVAC assembly and air duct structure of this vehicle air conditioning HVAC assembly.

[0025] The marks in the above figure are:

[0026] The following are marked in the figure:

[0027] 1. HVAC housing, 2. Evaporator, 3. Blower, 4. Heater core,

[0028] 5. Hot and cold air door, 501, gear,

[0029] 6. Face air outlet, 601. Face air door, 602. Side defrost air outlet, 603. Middle face air outlet, 604. Side defrost air duct,

[0030] 7. Foot blowing vent, 701. Foot blowing door, 702. Foot blowing duct,

[0031] 8. Defrost air outlet, 801. Defrost damper, 802. Front defrost air outlet, 803. Side defrost horn air duct, 804. Side defrost air duct, 805. Middle defrost air duct,

[0032] 9. Internal circulation air inlet, 901. External circulation air inlet, 902. Air inlet door panel,

[0033] 10. Drainage outlet,

[0034] 11. Bypass air duct. DETAILED DESCRIPTION

[0035] The following is a further detailed description of the specific implementation methods of the present invention by describing 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 its implementation.

[0036] Figure 1 The vehicle air conditioning HVAC assembly shown includes an HVAC housing 1 , in which an evaporator 2 , a blower 3 and a heater core 4 are arranged; a hot and cold air door 5 is arranged between the blower 3 and the heater core 4 .

[0037] The hot and cold air doors 5 can achieve an opening degree of 30%-70%, which can accurately control the air output, thereby achieving precise control of the temperature inside the car in spring and autumn; at the same time, through the opening control of the hot and cold air doors 5, a reasonable mixing and stratification of hot and cold air is achieved, and the temperature of the feet is higher when blowing on the face and feet, and the temperature of the feet is higher when blowing on the feet for defrosting, thereby ensuring the comfort of the driver.

[0038] The evaporator 2 is located near the air inlet of the blower 3, while the hot and cold air dampers 5 and heater core 4 are both located near the air outlet of the blower 3. Air flows from the evaporator 2 to the blower 3, the hot and cold air dampers 5, the heater core 4, the various mode dampers, and finally into the various mode air outlets. The evaporator 2 is positioned in front of the blower 3, with the heater core 4 and hot and cold air dampers 5 located at the air outlet of the blower 3. This arrangement is more conducive to ensuring uniform wind speed across the surface of the evaporator 2.

[0039] A rack is installed on the side of the hot and cold air dampers 5. A gear 501 is installed on the side of the hot and cold air dampers 5 near the air outlet of the blower 3. The rack and gear 501 mesh with each other. The hot and cold air dampers 5 have an arc-shaped structure. Gear 501 meshes with the rack, and the rotation of gear 501 drives the hot and cold air dampers 5 to move, thereby adjusting the opening degree of the hot and cold air dampers 5. This precisely controls the flow rate of hot and cold air, achieving a proper mixing and stratification of the hot and cold air, ensuring driver comfort.

[0040] A bypass duct 11 is provided in the HVAC housing 1 and is located on one side of the heater core 4 near the hot and cold air doors 5. Placing the heater core 4 behind the bypass duct 11 allows for proper mixing of hot and cold air, ensuring that the head air temperature is lower than the foot air temperature during mixing, thus meeting comfort requirements.

[0041] The HVAC housing 1 is provided with a face-blowing vent 6 , which is equipped with a face-blowing damper 601 . This damper 601 is located on one side of the heater core 4 . The face-blowing vent 6 is T-shaped, and the face-blowing damper 601 is a two-stage, linked damper shaped like a watermelon rind. This allows for synchronized control of the wind energy on the side and center surfaces, ensuring even distribution of airflow across the four surfaces.

[0042] The HVAC housing 1 is provided with a side-blowing face-side defrost air port 602 and a center-blowing face-side defrost air port 603, which are respectively connected to the blowing face air port 6. The side-blowing face-side defrost air port 602 is connected to a side-blowing face-side defrost air duct 604. The side-blowing face-side defrost air port 602 includes a left-blowing face-side defrost air port and a right-blowing face-side defrost air port; the side-blowing face-side defrost air duct 604 includes a left-blowing face-side defrost air duct and a right-blowing face-side defrost air duct; and the center-blowing face-side defrost air port 603 includes two center-blowing face-side defrost air ducts. Air flows from the blowing face air port 6 into the side-blowing face-side defrost air port 602, then flows from the side-blowing face-side defrost air port 602 into the side-blowing face-side defrost air duct 604 and is blown out, achieving hot and cold air blowing from both sides. Air flows from the blowing face air port 6 into the center-blowing face-side defrost air port 603 and is blown out, achieving hot and cold air blowing from the front.

[0043] The HVAC housing 1 is provided with a foot vent 7, which is provided with a foot damper 701. The foot damper 701 is located on one side of the heater core 4. The foot vent 7 is located on either side of the center-facing vent 603 and is connected to a foot duct 702. To ensure that the center-facing vent 603 can directly connect to the center-facing duct, the foot vent 7 is split into two, making room for the center-facing vent 603. This also ensures the compactness of the overall structure of the device.

[0044] The HVAC housing 1 is provided with a defrost vent 8, which is equipped with a defrost damper 801. The top of the HVAC housing 1 is provided with a front defrost vent 802 and a side defrost clevis duct 803, both connected to the defrost damper 801. The defrost damper 801 is a flip-up defrost damper plate. The front end of the defrost vent 8 connects to the front defrost vent 802, allocating 85% of the air volume. The side defrost clevis duct 803 connects to the side defrost duct 604 on the side of the cab, achieving comprehensive defrosting and effectively improving the defrosting effect.

[0045] One end of the side-blowing side defrost duct 604 is connected to the side-defrost claw duct 803; the other end of the side-blowing side defrost duct 604 is provided with a side defrost duct 804; a one-way diaphragm is provided between the side defrost duct 804 and the side-blowing side defrost duct 604; and the front defrost air outlet 802 is connected to the center defrost duct 805. The installation of the side defrost duct 804 on the side-blowing side defrost duct 604 ensures that the air volume required for side defrosting is introduced from the side defrost claw duct 803 into the side defrost duct 804 without changing the original vehicle air duct, thereby performing the side defrost operation. To prevent the wind direction in the side defrost duct 804 from reversing, a one-way diaphragm is provided to prevent airflow from entering the side defrost duct 804 when in the side-blowing mode.

[0046] The HVAC housing 1 includes an internal air inlet 9 and an external air inlet 901. An air inlet door 902 is located between the internal and external air inlets 901. A drain 10 is located at the bottom of the HVAC housing 1. External air can enter the HVAC housing 1 through the internal and external air inlets 901. The drain 10 drains water generated by the evaporator 2.

[0047] The specific workflow of this utility model is as follows:

[0048] The evaporator 2 is installed behind the internal circulation air inlet 9 and the external circulation air inlet 901 of the HVAC housing 1 to receive the internal and external circulation air; the blower 3 is a suction type and is arranged at the rear end of the evaporator 2; the air outlet side of the blower 3 first passes through the hot and cold air doors 5, and then the various mode air doors are used to distribute various air outlet modes; the mode air doors cooperate with the air outlet to form three major air outlets: defrost, face blowing, and foot blowing; the defrost air outlet 8 is connected to the front defrost air outlet 802 to distribute 85% of the air volume, and the wind on both sides of the wind are connected to the side defrost horn air duct 803 to connect to the side blowing face side defrost air duct 6 of the cab 04, can achieve comprehensive defrosting; the blowing face air outlet 6 is a T-shaped structure, which is opened and closed by two sections of watermelon-peel-shaped linked air doors, and controls the air outlets on the side blowing face and the middle blowing face at the same time; in order to ensure that the middle blowing face air outlet 603 can directly connect to the middle blowing face air duct, the foot blowing air outlet 7 is divided into two to make space for the middle blowing face air outlet 603; the three mode air door rocker arms are controlled by the same mode disk, and only one actuator is needed to drive it, which reduces the cost. The mode disk makes full use of the space on both the front and back sides to maximize the rotation angle of the mode disk, thereby improving the control accuracy and reducing the torque required for rotation.

[0049] The above description of the present invention is illustrative, 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 of the present invention to other situations without modification, are all within the scope of protection of the present invention.

Claims

1. A vehicle air conditioning HVAC assembly, characterized in that: The HVAC housing (1) comprises an evaporator (2), a blower (3) and a heater core (4) arranged in the HVAC housing (1); a hot and cold air door (5) is arranged between the blower (3) and the heater core (4); The evaporator (2) is arranged on a side close to the air inlet of the blower (3), and the cold and hot air doors (5) and the warm air core (4) are both arranged on a side close to the air outlet of the blower (3); A rack is provided on the side of the hot and cold air door (5); a gear (501) is provided on the side of the hot and cold air door (5) close to the air outlet of the blower (3), and the rack is meshed with the gear (501); A bypass air duct (11) is provided in the HVAC housing (1), and the bypass air duct (11) is arranged on a side of the warm air core (4) close to the hot and cold air doors (5).

2. The vehicle air conditioning HVAC assembly according to claim 1, characterized in that: The HVAC housing (1) is provided with a face-blowing air outlet (6); the face-blowing air outlet (6) is provided with a face-blowing air door (601); the face-blowing air door (601) is arranged on one side of the warm air core (4).

3. The vehicle air conditioning HVAC assembly according to claim 2, characterized in that: The HVAC housing (1) is provided with a side blowing surface defrost air outlet (602) and a middle blowing surface air outlet (603) respectively connected to the blowing surface air outlet (6); the side blowing surface defrost air outlet (602) is connected to a side blowing surface defrost air duct (604).

4. The vehicle air conditioning HVAC assembly according to claim 3, characterized in that: The HVAC housing (1) is provided with a foot-blowing air outlet (7), and the foot-blowing air outlet (7) is provided with a foot-blowing air door (701); the foot-blowing air door (701) is arranged on one side of the warm air core (4); the foot-blowing air outlet (7) is arranged on both sides of the middle blowing surface air outlet (603), and is connected to a foot-blowing air duct (702).

5. The vehicle air conditioning HVAC assembly according to claim 4, characterized in that: The HVAC housing (1) is provided with a defrost air outlet (8); the defrost air outlet (8) is provided with a defrost damper (801); and the top of the HVAC housing (1) is provided with a front defrost air outlet (802) and a side defrost horn air duct (803) connected to the defrost damper (801).

6. The vehicle air conditioning HVAC assembly according to claim 5, characterized in that: One end of the side-blowing surface side defrost air duct (604) is connected to the side-defrost horn air duct (803); the other end of the side-blowing surface side defrost air duct (604) is provided with a side defrost air duct (804); a one-way diaphragm is provided between the side defrost air duct (804) and the side-blowing surface side defrost air duct (604); the front defrost air outlet (802) is connected to a middle defrost air duct (805).

7. A vehicle air conditioning HVAC assembly according to any one of claims 2 to 6, characterized in that: The HVAC housing (1) comprises an internal circulation air inlet (9) and an external circulation air inlet (901); an air inlet door panel (902) is provided between the internal circulation air inlet (9) and the external circulation air inlet (901); and a drain outlet (10) is provided at the bottom of the HVAC housing (1).

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