WO2017117741A1 - 内外循环风门开启和关闭时力平衡机构及汽车空调 - Google Patents
内外循环风门开启和关闭时力平衡机构及汽车空调 Download PDFInfo
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- WO2017117741A1 WO2017117741A1 PCT/CN2016/070265 CN2016070265W WO2017117741A1 WO 2017117741 A1 WO2017117741 A1 WO 2017117741A1 CN 2016070265 W CN2016070265 W CN 2016070265W WO 2017117741 A1 WO2017117741 A1 WO 2017117741A1
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- WIPO (PCT)
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- cable
- damper
- swing arm
- closing
- outer circulation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
Definitions
- the invention relates to an opening and closing structure of an automobile air conditioner and an inner and outer circulation damper, in particular to a force balance mechanism and an automobile air conditioner when the inner and outer circulation dampers are opened and closed.
- the present invention provides a force balance mechanism for opening and closing of an inner and outer circulation damper which is both cost-effective and capable of operating comfort, and an automobile air conditioner thereof.
- the inner and outer circulation damper opening and closing force balancing mechanism of the present invention comprises a housing for installing a damper, and the inner balance damper opening and closing force balancing mechanism further comprises: a rocker arm, a cable and a balance a spring having a positive and negative force difference when the damper is opened and closed; wherein the rocker arm includes an active swing arm and a passive swing arm, and the active swing arm and the passive swing arm have a blunt angle The blunt angle ranges from 90 degrees to 120 degrees; the tail of the outer side of the active swing arm is hooked to the tail end of the cable, and the head end of the cable is connected to a control for controlling the switching of the inner and outer circulation dampers On the head; and the direction of the rocker a middle portion of one side of the inner side is formed with a rotating stepped shaft for driving the damper to swing synchronously, one end of the spring is hooked at the rotating stepped shaft, and the other end of the spring is hooked on the inner side of the passive swing arm The tail.
- the swinging of the active swing arm and the passive swing arm under the cable with the blunt angle can be used to subtly offset the moment existing when the damper swings forward and backward. Poor, so that the comfortable feel of the manual damper switching mechanism is realized by a simple mechanism.
- the control head can be implemented by a control mechanism existing in the prior art that can control the conversion of the inner and outer circulation dampers.
- the outer side of the active swing arm is provided with a cable connecting post for hooking the tail end of the cable
- the inner side of the passive swing arm is provided with a spring connecting column for hooking the spring.
- the blunt angle is 108 degrees.
- the experimental test shows that when the active swing arm and the passive swing arm are designed to have a blunt angle of 108 degrees, the difference between the positive and negative moments when the damper is switched is the smallest. Therefore, the manual manipulation feel is optimal in this state.
- the damper is erected in a damper hole of one side of the housing through a damper shaft, and the rotating stepped shaft passes through the damper hole and is engaged with the damper shaft.
- the rotating step shaft passes through a damper hole and is engaged with the damper shaft
- the active swing arm drives the rotating step shaft to rotate, and rotates.
- the rotation of the stepped shaft synchronously drives the swing of the damper to realize the internal and external cycle switching of the automobile air conditioner.
- the cable is sheathed with a sleeve for protecting the cable, the cable being free to shuttle linearly within the sleeve.
- the sleeve can be a PVC sleeve.
- the inner and outer circulation damper opening and closing force balancing mechanism further includes: a set of cable first buckle seat and a cable tail buckle seat for controlling the damper stroke; wherein the cable head a snap seat is fixed to the control head and is fastened to a sleeve at a front end of the cable, the cable tail snap seat is located at the housing and is fastened at the end of the cable On the sleeve at the end.
- the cable first seat and the cable tail buckle seat can be combined to control the swinging distance of the air door by controlling the pulling distance of the cable (also known as swinging in the industry). stroke).
- the control head includes a fork mechanism for controlling internal and external circulation damper switching
- the fork mechanism includes a plucking tongue
- a head of the cable is coupled to the plucking tongue (for The linear shuttle of the cable is driven by the dialing of the dialing tongue).
- the fork mechanism and the plucking tongue of the embodiment can be realized by using a similar fork mechanism and a plucking portion which are existing in the prior art. As long as it can be compared with the control head of the present invention Adapt it.
- the portion of the fork mechanism is not a modification of the present invention, and therefore will not be described herein.
- the present invention also provides an automobile air conditioner including the force balance mechanism for opening and closing the inner and outer circulation dampers as described above.
- the force balance mechanism when the inner and outer circulation dampers are opened and closed can be connected to the automobile air conditioner by means known in the art. This part is not a modification of the present invention, and therefore will not be described herein.
- the invention simplifies the structure by the simple component combination of the rocker arm and the spring, reduces the cost, and can balance the operation force during the operation of the mechanism, and greatly improves the operation comfort.
- the present invention can easily reduce the torque difference when the damper is switched to the minimum by the active swing arm and the passive swing arm formed on the rocker arm at a blunt angle of 90 degrees to 120 degrees, thus providing The equalizing torque during operation and the minimum operating force.
- the comfortable hand feeling during manual operation is further improved, and the high-end use experience of the user can be brought to the user while reducing the production cost.
- the invention can accurately control the damper stroke by setting the supporting cable first buckle seat and the cable tail buckle seat, and can directly ensure the accurate conversion of the inner and outer circulation modes of the air conditioner into place, without separately passing the human Observe to determine if it is in place. Therefore, the automatic precision of the switching of the air conditioning system is improved, and the overall performance of the automobile air conditioner is greatly improved.
- Figure 1 is a schematic view showing the assembly structure of the mechanism of the present invention.
- Figure 2 is a structural view of the mechanism of the present invention in an internal circulation state.
- Fig. 3 is a structural view showing the mechanism of the present invention in an outer circulation state.
- Figure 4 is a perspective structural view of the rocker arm of the present invention.
- the internal balance damper opening and/or closing force balancing mechanism includes a housing for installing the damper 9. 1, a rocker arm 2, a cable 3 and a spring 4 for balancing the positive and negative force difference when the damper is opened and closed; wherein the rocker arm 2 comprises an active swing arm 21 and a passive swing arm 22, the active swing arm 21 and the passive swing arm 22 have a blunt angle ⁇ (the blunt angle ⁇ ranges from 90 degrees to 120 degrees); the outer tail of the active swing arm 21 is hooked to the a tail end of the cable 3, the head end of the cable 3 is connected to a control head 5 for controlling the switching of the inner and outer circulation dampers; a middle portion of the inward side of the rocker arm 2 is formed with a damper for driving
- the rotating stepped shaft 23 is synchronously swung, one end of the spring 4 is hooked at the rotating stepped shaft 23, and the other end of the spring 4 is hooked to
- an outer side of the active swing arm 21 is provided with a cable connecting post 211 for hooking the tail end of the cable 3, and similarly, an inner side of the passive swing arm 22 is provided for attaching the The spring of the spring connects the post 221 .
- the damper 9 is erected in a damper hole symmetrically located on two sides of the casing 1 through a damper shaft, and the rotating stepped shaft 23 passes through the damper hole and is engaged with the damper.
- Rotating shaft When one end of the rotating step shaft 23 is passed through the damper hole on the same side and is engaged in the damper shaft, when the cable 3 pulls the active swing arm 21 to rotate, the active swing arm 21 drives the rotating step.
- the shaft 23 rotates, and the rotation of the rotary step shaft 23 synchronously drives the swing of the damper 9, so that the air circulation between the inner circulation and the outer circulation of the automobile air conditioner can be realized.
- the control head 5 of the present invention can be implemented by a control mechanism existing in the prior art capable of controlling internal and external circulation damper switching.
- the control head 5 of the present invention may include: a fork mechanism (not shown) for controlling the switching of the inner and outer circulation dampers, the fork mechanism including a plucking tongue (not shown), The head of the cable is connected to the plucking tongue for driving the cable by the plucking of the plucking tongue Linearly shuttle within the casing.
- the fork mechanism and the tongue can be realized by using a similar fork mechanism and a tongue portion existing in the prior art. As long as it can be adapted to the control head of the present invention.
- the control process of the force balance mechanism when the inner and outer circulation dampers of the present invention are opened or closed is:
- the inner and outer circulation damper switch (manual) provided on the control head 5 drives the rocker arm 2 to rotate by the cable 3 to control the opening and closing of the damper 9 of the inner and outer circulation, and is adjusted by the spring 4 connected to the rocker arm 2 Operating force when switching between internal and external circulation dampers.
- the control principle of the force balance mechanism of the present invention is:
- the swing of the active swing arm and the passive swing arm with a blunt angle can be used to subtly offset the torque difference between the front and the back of the damper for internal and external circulation switching, thereby realizing The comfortable operation of the manual damper switching mechanism.
- the force balance mechanism in Fig. 2 is in the inner circulation state, and the spring 2 is in the contracted state (initial state, no tensile or compression reaction force).
- the damper 9 needs to swing downward around the damper shaft (ie, swings counterclockwise), and at the same time, there is a downward acceleration due to the self-weight of the damper 9 itself.
- the spring 4 in the contracted state is synchronously stretched by the rotary step shaft 23 when the rocker arm 2 rotates, so that a reverse force acting on the rocker arm 2 for the gravity direction is applied. , balances the self-gravity when the damper 9 falls.
- the force balance mechanism avoids the fact that the damper is opened by itself (the damper rotates counterclockwise), and an appropriate operating force is applied, thereby realizing the comfort of the operation feeling when the damper is switched and ensuring the reliability of the damper position.
- the force balance mechanism in FIG. 3 is in an outer circulation state, and the spring 4 is already in a stretched state.
- the damper 9 When the damper 9 is switched from the outer circulation to the inner circulation, the damper 9 needs to swing upward in the axial direction of the damper (ie, swings in the clockwise direction), and the damper 9 has a downward self-weight, so the damper 9 needs to overcome one when swinging upward. The resistance caused by its own weight.
- the manual switching mechanism is very laborious when pulling the cable at this time.
- the spring capable of balancing the torque difference since the spring capable of balancing the torque difference is provided, the spring 4 in the tension state exerts an upward pulling force on the rocker arm 2 as the rocker arm 2 rotates as the rocker arm 2 swings. It can offset the resistance caused by the damper's own weight when the damper 9 swings upwards, that is, when the damper 9 swings upward, it can still achieve a balanced torque. This reduces the large operating force required for manual operation, and thus achieves a comfortable operating feel when the inner and outer circulation flaps are switched.
- the active swing arm and the passive swing arm of the rocker arm with a blunt angle and the spring provided on the rocker arm can reduce the operating torque by the spring resilience during the reverse operation, and the spring tension is appropriately increased.
- the positive operating torque so that the positive and reverse operating torque is stable when the damper is switched, and has an anti-external resistance torque, which can adapt to the bumpy damper of the vehicle to ensure a fixed opening degree, and the damper is at a predetermined position. Therefore, while reducing the production cost, not only the comfort feeling during manual operation is further improved, but also the damper position can be ensured, and a stable air-conditioning intake can be realized, giving the automobile user a high-end comfortable use experience.
- the cable of the embodiment has a sleeve for protecting the cable, and the cable can freely shuttle linearly within the sleeve.
- the sleeve can be a PVC sleeve so that the use of the cable is greatly enhanced.
- the inner and outer circulation damper opening and closing force balancing mechanism of the embodiment may further include: a set of cable first buckle seats 7 and a cable tail buckle seat 8 for controlling the stroke of the damper 9; wherein the cable first buckle seat 7 is fixed on the control head 5 and is engaged at the head end of the cable 3 On the sleeve 6, the cable tail snap seat 8 is located on the housing 1 and snaps onto the sleeve 6 at the trailing end of the cable 3.
- the swinging distance of the damper (also referred to as the swing stroke in the industry) can be controlled by controlling the pulling distance of the cable.
- the invention can accurately control the damper stroke by setting the supporting cable first buckle seat and the cable tail buckle seat, and can directly ensure the accurate conversion of the inner and outer circulation modes of the air conditioner into place, without separately observing by humans. Determine if it is in place. Therefore, the automatic precision of the switching of the air conditioning system is improved. Sexuality greatly improves the overall comfort of the car air conditioner.
- the present invention also provides an automobile air conditioner including the inner and outer circulation damper opening and closing force balancing mechanisms according to any one of embodiments 1 to 3 as described above.
- the inner and outer circulation damper opening and closing force balancing mechanism can realize the connection with the automobile air conditioner by means known in the prior art. This part is not a modification of the present invention, and therefore will not be described herein.
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Abstract
一种内外循环风门开启和关闭时力平衡机构，内外循环风门开启和关闭时力平衡机构包括：壳体（1），摇臂（2），拉索（3）及用于平衡风门开启和关闭时的正反力距差的弹簧（4）；摇臂（2）包括呈一钝夹角的一主动摆臂（21）与一被动摆臂（22），钝夹角为90度～120度；主动摆臂（21）挂接拉索（3）的尾端，拉索（3）的首端连接在一用于控制内外循环风门转换的控制头（5）上；摇臂（2）的朝内的一侧的中部形成有一旋转阶梯轴（23），弹簧（4）的一端挂接旋转阶梯轴（23）处，另一端挂接在被动摆臂（22）的内侧的尾部。力平衡结构通过摇臂和弹簧的零部件组合，简化了结构，能够平衡机构操作时的操作力，提高了汽车空调进风切换操作时的舒适性。
Description
本发明涉及汽车空调及内外循环风门的开闭结构，特别涉及一种内外循环风门开启和关闭时力平衡机构及汽车空调。
在现阶段汽车行业竞争日益加剧的背景下,各大汽车厂越来越强调整车的可靠性和经济性,以便在于同类车型的市场竞争中处于领先地位。
传统汽车空调一般采用电机控制运动机构实现内循环、外循环的风门开启和关闭，但这种控制结构通常都十分复杂且成本较高。
为适应成本竞争压力，也有采用手动操作的简便运动机构。但是这种现有的手动操作机构，通常只是简单地实现开启或关闭的转换操控，往往又存在档位受机械情况限制而造成的操作费劲且操作手感差的技术缺陷。
因此，本领域技术人员急需研发一种既节约成本，又能兼具操作时的舒适性的内外循环风门开启和关闭时力平衡机构。
发明内容
有鉴于现有技术的上述缺陷，本发明提供一种既节约成本，又能兼具操作舒适性的内外循环风门开启和关闭时力平衡机构及其汽车空调。
本发明的内外循环风门开启和关闭时力平衡机构包括用于装设风门的壳体，所述内外循环风门开启和关闭时力平衡机构还包括：一摇臂，一拉索及一用于平衡风门开启和关闭时的正反力距差的弹簧；其中，所述摇臂包括一主动摆臂与一被动摆臂，所述主动摆臂与被动摆臂之间呈一钝夹角，所述钝夹角的范围为90度～120度；所述主动摆臂的外侧的尾部挂接所述拉索的尾端，所述拉索的首端连接在一用于控制内外循环风门转换的控制头上；及所述摇臂的朝
内的一侧的中部形成有一用于带动风门同步摆动的旋转阶梯轴，所述弹簧的一端挂接在所述旋转阶梯轴处，所述弹簧的另一端挂接在所述被动摆臂的内侧的尾部。本实施例中，通过挂接在所述摇臂上的弹簧，配合呈钝夹角的主动摆臂、被动摆臂在拉索下的摆动，可以巧妙地抵销风门正反摆动时存在的力矩差，从而采用简单的机构即实现了手动风门切换操纵机构的舒适手感。另外，所述控制头可以采用现有技术中已有的能控制内外循环风门转换的控制机构来实现。
在一些实施例中，所述主动摆臂的外侧设有一用于挂接所述拉索的尾端的拉索连接柱，所述被动摆臂的内侧设有用于挂接所述弹簧的弹簧连接柱。
在一些实施例中，所述钝夹角为108度。经实验测试表明，当主动摆臂与被动摆臂之间设计成108度的钝夹角时，风门切换时存在的正反力矩差最小，因此，此状态下的手动操纵手感为最佳。
在一些实施例中，所述风门通过一风门转轴架设在所述壳体的单侧的风门孔内，所述旋转阶梯轴穿设一所述风门孔并且卡接于所述风门转轴。本实施例中通过使所述旋转阶梯轴穿设一所述风门孔并且卡接于所述风门转轴，则当拉索拉动主动摆臂旋转时，则主动摆臂带动旋转阶梯轴转动，而旋转阶梯轴的转动便同步带动风门的摆动，即可实现汽车空调的内、外循环切换。
在一些实施例中，所述拉索上套有一保护拉索用的套管，所述拉索能在所述套管内自由地线性穿梭。进一步地，该套管可以是一PVC套管。
在一些实施例中，所述内外循环风门开启和关闭时力平衡机构还包括：一组拉索首卡扣座和拉索尾卡扣座，用于控制风门行程；其中，所述拉索首卡扣座固设于所述控制头并卡接在所述拉索的首端处的套管上，所述拉索尾卡扣座位于所述壳体并卡接在所述拉索的尾端处的套管上。通过套管，既可以保护拉索，同时，还能结合拉索首卡扣座和拉索尾卡扣座，实现通过控制拉索的拉动距离，来控制风门的摆动辐度(业内又称摆动行程)。
在一些实施例中，所述控制头包括一用于控制内外循环风门转换的拨叉机构，所述拨叉机构包括一拨舌，所述拉索的首部与所述拨舌相连接(用于通过拨舌的拨动带动拉索的线性梭动)。本实施例的拨叉机构及拨舌均可以采用现有技术中已有的类似拨叉机构及拨舌部分来实现。只要能与本发明的控制头相
适配即可。该拨叉机构部分非本发明的改进点所在，故在此不作赘述。
另外，本发明还提供一种汽车空调，所述汽车空调包括如上所述的内外循环风门开启和关闭时力平衡机构。所述内外循环风门开启和关闭时力平衡机构可以采用现有技术中已知的方式实现与汽车空调的连接。该部分非本发明的改进点所在，故在此不作赘述。
在符合本领域常识的基础上，上述各优选条件，可任意组合，即得本发明各较佳实施例。
本发明的有益效果：
1、本发明通过摇臂和弹簧的简单零部件组合，简化了结构，降低了成本，同时也能够平衡机构操作时的操作力，并大大提高了操作的舒适性。
2、此外，本发明通过摇臂上形成的呈90度～120度的钝夹角的所述主动摆臂与被动摆臂，可以轻松地将风门切换时的力矩差减为最小，因此提供了操作时的均衡力矩，且操作力最小。同时，还进一步地提高了手动操作时的舒适手感，在降低生产成本的同时，还能带给用户的高端的使用惬意体验。
3、另外，本发明通过设置配套使用的拉索首卡扣座和拉索尾卡扣座，可精确地控制风门行程，能直接确保空调内外循环模式的准确转换到位，而无需另行通过人的观察来判断是否切换到位。因此提高了空调系统的切换时的自动精准性，大大提高了汽车空调的整体使用性能。
以下将结合附图对本发明的构思、具体结构及产生的技术效果作进一步说明，以充分地了解本发明的目的、特征和效果。
图1为本发明机构的总装结构示意图。
图2为本发明的机构处于内循环状态时的结构图。
图3为本发明的机构处于外循环状态时的结构图。
图4为本发明的摇臂的立体结构图。
附图标记说明：壳体1、摇臂2、主动摆臂21、被动摆臂22、旋转阶梯轴23、拉索连接柱211、弹簧连接柱221、拉索3、弹簧4、控制头5、套管6、
拉索首卡扣座7、拉索尾卡扣座8、钝夹角β、风门9
下面举出较佳实施例，并结合附图来更清楚完整地说明本发明。
实施例1
本发明的目的是通过以下技术方案来实现的：如图1～图4所示，本实施例提供的内外循环风门开启和/或关闭时力平衡机构，包括用于装设风门9的壳体1，一摇臂2，一拉索3及一用于平衡风门开启和关闭时的正、反力距差的弹簧4；其中，所述摇臂2包括一主动摆臂21与一被动摆臂22，所述主动摆臂21与被动摆臂22之间呈一钝夹角β(钝夹角β的范围为90度～120度)；所述主动摆臂21的外侧的尾部挂接所述拉索3的尾端，所述拉索3的首端连接在一用于控制内外循环风门转换的控制头5上；所述摇臂2的朝内的一侧的中部形成有一用于带动风门同步摆动的旋转阶梯轴23，所述弹簧4的一端挂接在所述旋转阶梯轴23处，所述弹簧4的另一端挂接在所述被动摆臂22的内侧的尾部。
示例性的，所述主动摆臂21的外侧设有一用于挂接所述拉索3的尾端的拉索连接柱211，同样的，所述被动摆臂22的内侧设有用于挂接所述弹簧的弹簧连接柱221。
如图1所示，所述风门9通过一风门转轴架设在对称地位于所述壳体1的两侧的风门孔内，所述旋转阶梯轴23穿设一所述风门孔并且卡接于风门转轴。通过使所述旋转阶梯轴23的一端穿设同侧的所述风门孔并且卡接在所述风门转轴内，则当拉索3拉动主动摆臂21旋转时，则主动摆臂21带动旋转阶梯轴23转动，而旋转阶梯轴23的转动便同步带动风门9的摆动，即可实现汽车空调的内循环、外循环之间的进风切换。
本发明所述控制头5可以采用现有技术中已有的能控制内外循环风门转换的控制机构来实现。例如，本发明的所述控制头5可以包括：一用于控制内外循环风门转换的拨叉机构(图中未标示)，所述拨叉机构包括一拨舌(图中未标示)，所述拉索的首部与所述拨舌相连接，用于通过拨舌的拨动带动拉索的
在套管内线性梭动。
其中，拨叉机构及拨舌均可以采用现有技术中已有的类似拨叉机构及拨舌部分来实现。只要能与本发明的控制头相适配即可。
本发明的内外循环风门开启或关闭时力平衡机构的控制过程为：
由控制头5上设置的内外循环风门切换开关(手动)通过拉索3驱动摇臂2转动，以控制内外循环的风门9的开闭，同时通过连接在摇臂2上的弹簧4，来调整内外循环风门切换时的操作力。
本发明的力平衡机构的控制原理为：
通过挂接在所述摇臂上的弹簧，配合呈钝夹角的主动摆臂、被动摆臂的摆动，可以巧妙地抵销风门进行内外循环切换而作的正反摆动的力矩差，从而实现手动风门切换操纵机构的舒适操作手感。
下面将结合图2和图3来进一步详细地说明采用本发明的力平衡机构的是如何为风外循环风门开启和/或关闭时的切换提供平衡的力矩的：
如图2所示，此时，图2中的力平衡机构处于内循环状态，弹簧2是处于收缩状态(初始状态,无拉伸或压缩反作用力)。当风门9由内循环向外循环进行切换时，风门9需绕风门转轴向下摆动(即沿逆时针方向摆动)，同时因风门9本身的自重会有一个向下的加速度，此时，随着摇臂2的摆动，处于收缩状态的弹簧4在摇臂2转动时被旋转阶梯轴23同步拉伸，这样，就给摇臂2施加了一个机构做重力方向运动时的反向作用力，平衡了风门9下落时的自重力。也为风门9下落提供了均衡的力矩。同时由汽车振动等外部导致风门向下摆动导致风门转动,会导致弹簧进一步拉伸,提供阻力矩,避免风门位置有明显变化。因此，该力平衡机构避免原来受重力影响风门自行打开(风门逆时针转动)，施加了适当的操作力，实现了风门切换时操作手感的舒适性同时保证风门位置可靠性。
再请参见图3所示，此时，图3中的力平衡机构处于外循环状态，弹簧4已处于拉伸状态。当风门9由外循环向内循环进行切换时，风门9需绕风门转轴向上摆动(即沿顺时针方向摆动)，而风门9由于存在一个向下的自重，因此风门9向上摆动时需克服一个因其自重所带来的阻力。如现有技术中常见的
一般手动切换机构，则此时拉动拉索时是十分费力的。而本发明由于设置了能起到平衡力矩差的弹簧，则随着摇臂2的摆动，处于拉伸状态的弹簧4在摇臂2转动时给摇臂2施加了一个向上的拉力，因此，就能抵销风门9向上摆动时因风门自重所造成的阻力，也即：当风门9向上摆动时也仍能实现一个均衡的力矩。如此便减轻了原来进行手动操作时所需的大操作力，因此，实现了内外循环风门切换时的舒适操作手感。
本发明通过摇臂的呈钝夹角的主动摆臂与被动摆臂，并配合设置在摇臂上的弹簧，便可以在逆向操作时通过弹簧的回弹力来减轻操作力矩，弹簧拉伸增加适当的正向操作力矩,从而使风门切换时正、逆向操作的力矩稳定，且有抗外力阻力矩，能够适应车辆颠簸中风门保证固定开度，风门处于规定位置。因此，在降低生产成本的同时，不仅进一步地提高了手动操作时的舒适手感，并且能够保证风门位置,实现稳定的空调进风，带给汽车用户高端的舒适使用体验。
实施例2
本实施例与实施例1的不同在于，本实施例的所述拉索上套有一保护拉索用的套管，并且所述拉索能在所述套管内自由地线性穿梭。
示例性的，该套管可以是一PVC套管，这样拉索的使用牢固性大大增强。
本实施例的其它部分与实施例1完全相同。
实施例3
本实施例与实施例2的不同在于，如图1和图2所示，本实施例的所述内外循环风门开启和关闭时力平衡机构还可以包括：一组拉索首卡扣座7和拉索尾卡扣座8，用于控制风门9的行程；其中，所述拉索首卡扣座7固设于所述控制头5上并卡接在所述拉索3的首端处的套管6上，所述拉索尾卡扣座8位于所述壳体1并卡接在所述拉索3的尾端处的套管6上。
通过套管，结合拉索首卡扣座和拉索尾卡扣座，则能实现通过控制拉索的拉动距离，来控制风门的摆动辐度(业内又称摆动行程)的作用。
因此，本发明通过设置配套使用的拉索首卡扣座和拉索尾卡扣座，可精确地控制风门行程，能直接确保空调内外循环模式的准确转换到位，而无需另行通过人的观察来判断是否切换到位。因此提高了空调系统的切换时的自动精准
性，大大提高了汽车空调的整体使用舒适性。
本实施例的其它部分与实施例2完全相同。
实施例4
本发明还提供一种包括如上所述实施例1～3中任意一种的内外循环风门开启和关闭时力平衡机构的汽车空调。其中，所述内外循环风门开启和关闭时力平衡机构可以采用现有技术中已知的方式实现与汽车空调的连接。该部分非本发明的改进点所在，故在此不作赘述。
以上详细描述了本发明的各较佳具体实施例。应当理解，本领域的普通技术人员无需创造性劳动就可以根据本发明的构思作出诸多修改和变化。因此，凡本技术领域中技术人员依本发明的构思在现有技术的基础上通过逻辑分析、推理或者有限的实验可以得到的技术方案，皆应在由权利要求书所确定的保护范围内。
Claims (8)
- 一种内外循环风门开启和关闭时力平衡机构，包括用于装设风门的壳体，其特征在于，所述内外循环风门开启和关闭时力平衡机构还包括：一摇臂，一拉索及一用于平衡风门开启和关闭时的正反力距差的弹簧；其中，所述摇臂包括一主动摆臂与一被动摆臂，所述主动摆臂与被动摆臂之间呈一钝夹角，所述钝夹角的范围为90度～120度；所述主动摆臂的外侧的尾部挂接所述拉索的尾端，所述拉索的首端连接在一用于控制内外循环风门转换的控制头上；及所述摇臂的朝内的一侧的中部形成有一用于带动风门同步摆动的旋转阶梯轴，所述弹簧的一端挂接在所述旋转阶梯轴处，所述弹簧的另一端挂接在所述被动摆臂的内侧的尾部。
- 如权利要求1所述的内外循环风门开启和关闭时力平衡机构，其特征在于，所述主动摆臂的外侧设有一用于挂接所述拉索的尾端的拉索连接柱，所述被动摆臂的内侧设有用于挂接所述弹簧的弹簧连接柱。
- 如权利要求1所述的内外循环风门开启和关闭时力平衡机构，其特征在于，所述钝夹角为108度。
- 如权利要求1所述的内外循环风门开启和关闭时力平衡机构，其特征在于，所述风门通过一风门转轴架设在所述壳体的单侧的风门孔内，所述旋转阶梯轴穿设一所述风门孔并且卡接于所述风门转轴。
- 如权利要求1所述的内外循环风门开启和关闭时力平衡机构，其特征在于，所述拉索上套有一保护拉索用的套管，所述拉索能在所述套管内自由地线性穿梭。
- 如权利要求5所述的内外循环风门开启和关闭时力平衡机构，其特征在于，所述内外循环风门开启和关闭时力平衡机构还包括：一组拉索首卡扣座和拉索尾卡扣座，用于控制风门行程；其中，所述拉索首卡扣座固设于所述控制头并卡接在所述拉索的首端处的套管上，所述拉索尾卡扣座位于所述壳体并卡接在所述拉索的尾端处的套管上。
- 如权利要求1～6中任意一项所述的内外循环风门开启和关闭时力平衡 机构，其特征在于，所述控制头包括一用于控制内外循环风门转换的拨叉机构，所述拨叉机构包括一拨舌，所述拉索的首部与所述拨舌相连接。
- 一种汽车空调，其特征在于，所述汽车空调包括如权利要求1～7中任意一项所述的内外循环风门开启和关闭时力平衡机构。
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