JP2018020650A - Vehicular air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular air conditioner which can be improved in air blowing efficiency and in manufacturability and at the same time can be reduced in weight.SOLUTION: In a pair of first and second air mix dampers 32 and 34 constituting a vehicular air conditioner 10, at a lower end part 32b of the first air mix damper 32 are provided, through a first seal member mounting surface 38b, a pair of first seal members 44a and 44b, and at an upper end part 34a of the second air mix damper 34 is provided, through a second seal member mounting surface 40a, a single second seal member 46b. In a full-closed state where the first air mix damper 32 and the second air mix damper 34 move to approach each other, the first seal member 44a provided in the first air mix damper 32 is sealed by directly contacting the second seal member mounting surface 40a of the second air mix damper 34, so as to block airflow.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle air conditioner that is mounted on a vehicle and adjusts the temperature of the vehicle interior by blowing air, which has been temperature-adjusted by a heat exchanger in the air conditioning case, into the vehicle interior.

  The present applicant has proposed a vehicle air conditioner having a slide type air mix damper between an evaporator and a heater core in an air conditioning case (see Patent Document 1). In this vehicle air conditioner, a plate-like air mix damper is slidably provided, and the air mix damper is engaged with a pinion shaft via a rack gear. Then, when the pinion shaft rotates under the driving action of the driving source, the air mix damper slides and moves from the position facing the heater core to the position away from the heater core, and the air circulation state between the downstream side of the evaporator and the upstream side of the heater core Is switched.

JP 2014-162305 A

  The present invention has been made in connection with the above proposal, and an object thereof is to provide a vehicle air conditioner capable of improving air blowing efficiency and manufacturability and reducing the weight.

In order to achieve the above object, the present invention provides an air conditioning case having an air passage therein, a cooler provided inside the air conditioning case for cooling air, and provided on the downstream side of the cooler. In a vehicle air conditioner having a heater that performs heating, and a set of air mix dampers that are slidably provided between the cooler and the heater to adjust the mixing ratio of cold air and hot air,
The air mix dampers are provided so as to be able to approach and separate from each other by sliding displacement, a seal member is provided at the end of one air mix damper facing each other, and the air mix dampers slid in a direction approaching each other In this case, the sealing member is in contact with an end portion of the other air mix damper not provided with the sealing member.

  According to the present invention, in a vehicle air conditioner having a pair of air mix dampers, the air mix dampers are provided so as to be able to approach and separate from each other by sliding displacement, and the ends of one air mix damper facing each other When the air mixing damper is slid in the direction in which the air mixing dampers approach each other, the sealing member abuts against the end of the other air mixing damper where the sealing member is not provided.

  Therefore, a sealing member is provided at each end of a set of air mix dampers, and, for example, compared with the case where a portion where the sealing member abuts is provided in the air conditioning case, the manufacturing cost and assembly man-hour can be reduced by reducing the sealing member. The reduction can be achieved, and by eliminating the abutting portion, the ventilation resistance when the air flows can be reduced, and the blowing efficiency when the air flows can be improved.

  Moreover, it is good to provide a sealing member in the attachment part substantially orthogonal to the sliding direction of an air mix damper in the edge part of an air mix damper.

  Furthermore, the sealing member may be provided so as to protrude toward the end portion of one or the other air mix damper facing each other.

  According to the present invention, the following effects can be obtained.

  That is, a pair of air mix dampers are provided so as to be able to approach and separate from each other by sliding displacement, and a seal member is provided at the end of one air mix damper facing each other so that the air mix dampers approach each other. The seal member is brought into contact with the end portion of the other air mix damper not provided with the seal member. Thus, a sealing member is provided at each end of a set of air mix dampers, for example, compared with the case where a portion where the sealing member abuts is provided in the air conditioning case, the sealing member is reduced, and the manufacturing cost and assembly man-hour are reduced. Reduction can be achieved, and by eliminating the need for a contact portion, ventilation resistance when air flows can be reduced and air blowing efficiency can be improved.

1 is an overall cross-sectional view of a vehicle air conditioner according to an embodiment of the present invention. It is an expanded sectional view which shows the 1st and 2nd air mix damper vicinity in the vehicle air conditioner of FIG. FIG. 2 is an enlarged cross-sectional view showing a fully opened state in which the first air mix damper and the second air mix damper are moved away from each other in the vehicle air conditioner of FIG. 1.

  DESCRIPTION OF EMBODIMENTS Preferred embodiments of a vehicle air conditioner according to the present invention will be described in detail below with reference to the accompanying drawings. In FIG. 1, reference numeral 10 indicates a vehicle air conditioner according to an embodiment of the present invention.

  As shown in FIG. 1, the vehicle air conditioner 10 includes an air conditioning case 12 that constitutes each air passage, an evaporator 14 that is disposed inside the air conditioning case 12 and cools the air, and heats the air. The air introduced into the heater core 16 and the air conditioning case 12 is heat-exchanged by the evaporator 14 and the heater core 16, and the temperature-controlled cold air and hot air are mixed at a predetermined mixing ratio to obtain mixed air. The mixing mechanism 18 includes a driving source (not shown) provided on the side surface of the air-conditioning case 12 and a driving force transmission mechanism 20 that transmits a driving force by an occupant to the air mixing mechanism 18 to rotate and displace it. .

  Above the air conditioning case 12, there are opened a vent air vent 22 for sending air near the occupant's face and a defroster air outlet 24 adjacent to the vent air vent 22 for sending air near the front window of the vehicle. Yes. The defroster air outlet 24 is formed adjacent to the vehicle front side (arrow A direction) and the vent air outlet 22 is adjacent to the vehicle rear side (arrow B direction).

  In addition, on the vehicle rear side of the air conditioning case 12 (in the direction of arrow B), a heat blower opening 26 that blows air near the feet of the passenger is opened.

  The vent blower port 22, the defroster blower port 24, and the heat blower port 26 are provided with switching dampers 28a to 28c for switching the blowing state, respectively, so that they can be opened and closed.

  On the other hand, inside the air conditioning case 12, an opening 30 into which air is introduced from a blower (not shown) into the air conditioning case 12 opens to the side, and is on the upstream side in the air flow direction (arrow A direction). An evaporator 14 is provided at a position, and a heater core 16 is provided at a predetermined interval at a position downstream (in the direction of arrow B) with respect to the evaporator 14. The opening 30 described above is opened further upstream (in the direction of arrow A) of the evaporator 14.

  In addition, an air mix mechanism 18 is provided between the evaporator 14 and the heater core 16 to adjust the flow amount and flow state when the air cooled by the evaporator 14 is flowed downstream.

  Further, the air-conditioning case 12 transmits a driving force from an operation lever or a driving source (not shown) to the air mix mechanism 18 at a position upstream (in the direction of arrow A) with respect to the air mix mechanism 18. A driving force transmission mechanism 20 to be operated is provided.

  As shown in FIGS. 1 to 3, the air mix mechanism 18 includes a first air mix damper (air mix damper) 32 provided so as to face the upper portions of the evaporator 14 and the heater core 16, and the first air mix damper 32. And a second air mix damper (air mix damper) 34 provided below (in the direction of arrow D).

  The first and second air mix dampers 32 and 34 are made of, for example, a plate having an arcuate cross section formed with a large radius and separated from the evaporator 14, that is, on the heater core 16 side (in the direction of arrow B in FIG. 1). ) To form a gentle convex shape.

  The first and second air mix dampers 32 and 34 are provided along the width direction of the air conditioning case 12 and guided along a guide portion (not shown) provided on the inner wall surface of the air conditioning case 12. In addition, a set of rack gears 36 is provided along the inner peripheral surface facing the evaporator 14. The rack gear 36 is formed in a straight line along the sliding direction of the first and second air mix dampers 32 and 34.

  As shown in FIGS. 2 and 3, a pair of first seal members that are bent in an L-shaped cross section and protrude toward the heater core 16 (in the direction of arrow B) are provided at both ends of the first air mix damper 32. Attachment surfaces (attachment portions) 38a and 38b are provided, and a pair of first seal members 44a and 44b are provided on the first seal member attachment surfaces 38a and 38b, respectively.

  At both ends of the second air mix damper 34, a pair of second seal member mounting surfaces (mounting portions) 40a and 40b which are bent in an L-shaped cross section and protrude toward the heater core 16 (arrow B direction) are provided. One second seal member mounting surface 40a is provided with a single second seal member 46b, and the other second seal member mounting surface 40b is provided with a pair of second seal members 46a and 46b.

  One first and second seal member mounting surfaces 38a, 40a are provided at the upper end portions 32a, 34a of the first and second air mix dampers 32, 34, and the other first and second seal member mounting surfaces are provided. 38b and 40b are provided at the lower end portions 32b and 34b of the first and second air mix dampers 32 and 34, respectively.

  The first seal members 44a and 44b are formed of an elastic material such as rubber, for example, in a rectangular cross section. In the first air mix damper 32, one first seal member 44a is the first seal member mounting surface 38a or 38b. The protruding portion 42 of the first seal member mounting surfaces 38a, 38b is provided with the other first seal member 44b provided on the outer side of the protruding portion 42 along the sliding direction of the first air mix damper 32. Are provided so as to be inside along the sliding direction.

  That is, two pairs of first seal members 44a and 44b are provided at both ends of the first air mix damper 32 via a pair of first seal member mounting surfaces 38a and 38b, respectively.

  In other words, the first air mix damper 32 is provided with a total of four first seal members 44a and 44b.

  On the other hand, in the second air mix damper 34, similarly to the first air mix damper 32, for example, a second seal member mounting surface 40a formed from an elastic material such as rubber in a rectangular cross section and provided at the upper end 34a thereof. The second seal member 46b is provided only on the inner side of the protruding portion 42, and no seal member is provided on the outer side. The second seal member mounting surface 40b of the second air mix damper 34 provided at the lower end 34b is provided with a second seal member 46a on the outer side of the protruding portion 42, and on the inner side of the second seal member 46b. Is provided.

  That is, in the second air mix damper 34, only a single second seal member 46b is provided at the upper end 34a on the first air mix damper 32 side, and the lower end 34b is the same as the first air mix damper 32. A pair of second seal members 46a and 46b is provided. In other words, the second air mix damper 34 is provided with a total of three second seal members 46a and 46b.

  The first seal members 44a and 44b and the second seal members 46a and 46b described above are, for example, in relation to the protruding portions 42 of the first seal member mounting surfaces 38a and 38b and the second seal member mounting surfaces 40a and 40b, respectively. Affixed with an adhesive or the like.

  As shown in FIGS. 1 and 2, when the first and second air mix dampers 32 and 34 approach each other, the first seal member 44a provided at the lower end 32b of the first air mix damper 32; The projecting portion 42 of the second seal member mounting surface 40a provided at the upper end 34a of the second air mix damper 34 comes into contact with the lower end 32b of the first air mix damper 32 and the second air. A seal is made between the upper end 34 a of the mix damper 34.

  The first seal member 44b provided at the upper end portion 32a of the first air mix damper 32 and the second seal member 46b provided at the lower end portion 34b of the second air mix damper 34 hold the heater core 16 respectively. A seal is made by contacting the inner wall 12a.

  On the other hand, as shown in FIG. 3, when the first and second air mix dampers 32, 34 move away from each other, the first seal provided at the lower end portion 32 b of the first air mix damper 32. The member 44b and the second seal member 46b provided at the upper end portion 34a of the second air mix damper 34 abut against the first inner wall portion 12a, respectively, while being provided at the upper end portion 32a of the first air mix damper 32. The first seal member 44a and the second seal member 46a provided at the lower end portion 34b of the second air mix damper 34 abut against the second inner wall portion 12b of the air conditioning case 12, respectively. As a result, the air flow through the outside of the heater core 16 on the downstream side of the evaporator 14 is reliably blocked.

  The driving force transmission mechanism 20 includes first and second shafts 48 and 50 that are respectively meshed with the rack gears 36 of the first and second air mix dampers 32 and 34, and the first and second air mix dampers 32 and 34. And the evaporator 14, and are provided so as to be spaced apart from each other by a predetermined distance in the vertical direction (arrow C and D directions) and parallel to each other.

  The first and second shafts 48 and 50 are, for example, a shaft portion 52 that is rotatably supported with respect to the side wall portion of the air conditioning case 12, and an outer peripheral surface that expands radially outward with respect to the shaft portion 52. A pinion gear 54 having gear teeth is provided, and an operation cable (operation lever) or a drive source (actuator) is connected to an end portion of the shaft portion 52 outside the air conditioning case 12 via a link mechanism.

  The pinion gear 54 of the first shaft 48 is meshed with the rack gear 36 of the first air mix damper 32, and the pinion gear 54 of the second shaft 50 is meshed with the rack gear 36 of the second air mix damper 34. The first and second shafts 48 and 50 are rotated in a predetermined direction under the driving action of the operating lever or the driving source, and the first and second air mix dampers 32 and 34 are moved along guide portions (not shown). Slide displacement in the vertical direction.

  The vehicle air conditioner 10 according to the embodiment of the present invention is basically configured as described above. Next, its operation and effects will be described.

  First, the case where the cooling operation which lowers the room temperature of the passenger compartment shown in FIGS. 1 and 2 is performed and the air is blown to the vicinity of the passenger's face in the passenger compartment will be described.

  When a passenger (not shown) operates the operation lever in the passenger compartment and selects the cooling operation, the first and second shafts 48 and 50 rotate in a predetermined direction in accordance with the operation of the operation lever. The first air mix damper 32 moves downward (in the direction of arrow D), the second air mix damper 34 moves up (in the direction of arrow C), and a first seal provided at the lower end 32b of the first air mix damper 32. The member 44a and the second seal member attachment surface 40a provided at the upper end portion 34a of the second air mix damper 34 come into contact with each other. As a result, the lower end portion 32b of the first air mix damper 32 and the upper end portion 34a of the second air mix damper 34 are in a sealed state, so that the communication between the downstream side of the evaporator 14 and the heater core 16 is established. Is reliably shut off.

  At the same time, based on a control signal from a controller (not shown), air taken in under the action of a blower (not shown) is supplied into the air conditioning case 12 through the opening 30 and passes through the evaporator 14 to exchange heat. It is performed and cooled to a predetermined temperature.

  The cooled air is in a fully closed state in which the first and second air mix dampers 32 and 34 come close to each other and come into contact with each other. Therefore, the cooled air does not flow toward the heater core 16 side. After flowing below, the air is supplied to the vicinity of the occupant's face in the passenger compartment through the vent air vent 22 opened under the switching action of the switching damper 28a.

  Next, in the case where the heating operation for raising the room temperature in the passenger compartment is performed and the air is blown to the vicinity of the feet of the passengers in the passenger compartment, the heating operation is selected by operating an operation lever (not shown). As shown, the first and second shafts 48 and 50 rotate in predetermined directions, the first air mix damper 32 moves upward (arrow C direction), and the second air mix damper 34 moves downward (arrow D direction). ), The first seal member 44a of the first air mix damper 32 and the second seal member mounting surface 40a of the second air mix damper 34 are separated from each other, so that the downstream side of the evaporator 14 and the heater core 16 Is fully open.

  The air blown from a blower (not shown) and cooled by passing through the evaporator 14 passes through the heater core 16 between the first air mix damper 32 and the second air mix damper 34 to reach a predetermined temperature. It is heated and blown from the heat blower opening 26 opened under the switching action of the switching damper 28c to the vicinity of the feet of the occupant in the passenger compartment.

  As described above, in the present embodiment, the first seal member of the first air mix damper 32 in the fully closed state in which the first air mix damper 32 and the second air mix damper 34 move so as to approach each other. 44a and the second seal member mounting surface 40a of the second air mix damper 34 are in direct contact with each other, so there is no need to provide the contact portion of the first seal member 44a in the air conditioning case 12, and the first and During the heating operation in which air flows through the space between the second air mix dampers 32 and 34 to the heater core 16, the contact portion is prevented from becoming a ventilation resistance.

  As a result, air blowing efficiency during heating operation can be improved, heating performance can be improved, and noise and the like that are concerned when flowing in the vicinity of the contact portion can be suppressed, so that passenger comfort is improved. Is possible.

  Moreover, weight reduction can be achieved by eliminating the contact portion of the first and second air mix dampers 32 and 34.

  Furthermore, since the second seal member provided in the second air mix damper 34 can be reduced by one compared with the conventional vehicle air conditioner, the manufacturing cost can be reduced by reducing the number of parts. At the same time, the number of assembly steps can be reduced. It is also possible to reduce the weight by reducing the number of second seal members.

  In the above-described embodiment, the first air mix damper 32 is provided with two pairs (four) of the first seal members 44 a and 44 b, while the second air mix damper 34 has a second end at the second end 34 a. Although the three second seal members 46a and 46b are provided without providing the seal member 46a, the present invention is not limited to this.

  For example, the protruding portion 42 of the first seal member mounting surface 38b is exposed without providing the first seal member 44a at the lower end 32b of the first air mix damper 32, and the second seal member mounting surface of the second air mix damper 34 is exposed. A second seal member 46a may be provided for 40a, and the second seal member 46a may be brought into contact with the first seal member mounting surface 38b.

  That is, the first seal member 44a or the second seal member 46a may be provided on one of the lower end portion 32b of the first air mix damper 32 and the upper end portion 34a of the second air mix damper 34 facing each other. .

  In addition, the vehicle air conditioner according to the present invention is not limited to the above-described embodiment, and various configurations can be adopted without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Vehicle air conditioner 12 ... Air conditioning case 14 ... Evaporator 16 ... Heater core 18 ... Air mix mechanism 20 ... Driving force transmission mechanism 32 ... 1st air mix damper 34 ... 2nd air mix damper 38a, 38b ... 1st seal member attachment Surfaces 40a, 40b ... Second seal member mounting surface 42 ... Projection site 44a, 44b ... First seal members 46a, 46b ... Second seal member

Claims (3)

An air conditioning case having an air passage therein, a cooler provided inside the air conditioning case for cooling air, a heater provided on the downstream side of the cooler for heating the air, and the cooler In a vehicle air conditioner having a set of air mix dampers that are slidably provided between the air heater and the heater and adjust a mixing ratio of cold air and hot air,
The air mix dampers are provided so as to be able to approach and separate from each other by sliding displacement, a seal member is provided at the end of one air mix damper facing each other, and the air mix dampers are in a direction in which they approach each other. The vehicular air conditioner is characterized in that, when sliding, the seal member comes into contact with an end portion of the other air mix damper not provided with the seal member. The vehicle air conditioner according to claim 1,
The vehicle air conditioner is characterized in that the seal member is provided at an end of the air mix damper at a mounting portion that is substantially orthogonal to the sliding direction of the air mix damper. The vehicle air conditioner according to claim 1 or 2,
The vehicle air conditioner, wherein the seal member is provided so as to protrude toward the end of one or the other air mix damper facing each other.

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