JP2010000854A - Air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner for a vehicle attaining securing a degree of freedom in a setting position of an aromatic unit and an aromatic action accompanying blow-out of conditioned air to a cabin. <P>SOLUTION: In this air conditioner, the aromatic unit 7 is disposed in air conditioning route from an air intake port to a blowout port to the cabin. In the aromatic unit 7, solid solvent 76 volatilizing aromatic components is covered with double cylinders 72 and 73 by slidably fitted outside cylinder 72 and inside cylinder 73, and a cylinder end face is made as a dynamic pressure receiving surface of conditioned air by directing a cylinder shaft CL of the double cylinders 72 and 73 to an upstream side of the conditioned air. The outside cylinder 72 and the inside cylinder 73 are provided with a passage opening and closing structure 75 to open an aromatic passage F for returning conditioned air introduced into the inside from the outside of the double cylinders 72 and 73 to the outside of the double cylinders 72 and 73 again by dynamic pressure of conditioned air received by the dynamic pressure receiving surface when the dynamic pressure by the conditioned air is generated, and to close the aromatic passage F when there is no conditioned air. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an air conditioner for a vehicle in which an aroma unit is arranged in an air-conditioning air path extending from an air intake port to an air outlet into a vehicle compartment.

  Conventionally, as a vehicle air conditioner, a solid solvent that volatilizes an aromatic component is disposed in an air conditioning air path upstream of a heat exchanger via a solvent holding unit, and the solvent holding unit has an air conditioning air volume or There has been known one provided with a divergence amount control means for decreasing the divergence amount from the solid solvent as the air-conditioning wind pressure increases (see, for example, Patent Document 1).

As said divergence amount control means, when there is no air conditioning wind, the exposed area of the solid solvent is the maximum area, and by receiving the air conditioning wind with the wind receiving plate, the outer cylinder having the wind receiving plate rotates with respect to the inner cylinder, The exposed area of the solid solvent is narrowed according to the rotation angle of the outer cylinder.
Utility Model Registration No. 3029872

  However, the conventional vehicle air conditioner employs a structure in which the conditioned air is received by a wind receiving plate that protrudes from the solid solvent accommodating portion toward the conditioned air path, and therefore is disposed in the conditioned air path. The airflow resistance of the conditioned air varies depending on the rotation angle of the wind receiving plate. For this reason, in order to stabilize the air distribution amount of the air-conditioning air and stabilize the air-conditioning temperature, it is necessary to provide a solvent holding means for holding the solid solvent in the air-conditioning air path upstream of the heat exchanger. is there. That is, there is a problem that the setting position of the fragrance unit is restricted.

  The present invention has been made paying attention to the above-described problem, and is a vehicle air conditioner capable of ensuring the set position degree of freedom of the fragrance unit and the fragrance action associated with the conditioned air blowing into the passenger compartment. The purpose is to provide.

In order to achieve the above object, in the vehicle air conditioner of the present invention, the fragrance unit is disposed in the conditioned air path from the air intake port to the air outlet to the vehicle interior.
The fragrance unit covers a solid solvent that volatilizes fragrance components with a double cylinder composed of an outer cylinder and an inner cylinder slidably fitted, and directs the cylinder axis of the double cylinder toward the upstream side of the conditioned air. Thus, the cylinder end surface was used as a dynamic pressure receiving surface of the conditioned air.
When dynamic pressure due to the conditioned air is generated in the outer cylinder and the inner cylinder, the conditioned air introduced from the outside to the inside of the double cylinder is again introduced into the double cylinder by the dynamic pressure of the conditioned air received by the dynamic pressure receiving surface. A fragrance passage returning to the outside of the cylinder is opened, and a passage opening / closing structure is provided to close the fragrance passage when there is no conditioned air.

Therefore, in the vehicle air conditioner of the present invention, when dynamic pressure is generated by the conditioned air, the dynamic pressure of the conditioned air is received at the cylinder end surface of the double cylinder, and the ventilation resistance is suppressed to a low level. It shows the effect of keeping the dynamic pressure receiving area constant regardless of the wind volume. Therefore, the ventilation resistance with respect to the conditioned air does not fluctuate, and the air distribution amount of the conditioned air is stabilized and the air temperature is stabilized. That is, there is no restriction on the setting position of the fragrance unit.
As a result, it is possible to secure the degree of freedom of setting position of the fragrance unit while maintaining the functions of the prior art.

  Hereinafter, the best mode for realizing the vehicle air conditioner of the present invention will be described based on Examples 1 to 3 shown in the drawings.

First, the configuration will be described.
FIG. 1 is an overall system diagram illustrating an example of a vehicle air conditioner including the fragrance unit according to the first embodiment.

  As shown in FIG. 1, the vehicle air conditioner of Embodiment 1 includes a blower unit 1, an air conditioning unit 2, a front vent duct 3, a rear vent duct 4, a differential duct 5, a foot duct 6, and an aroma. And a unit 7.

  As shown in FIG. 1, the blower unit 1 has an intake case 11, a scroll case 12, an intake duct 13, intake doors 14 and 15, a clean filter 16, a blower fan 17, and a blower motor 18. Configured. By controlling the opening of the intake doors 14 and 15, the intake air to the air conditioning unit 2 is switched between the outside air introduction mode and the inside air circulation mode.

  As shown in FIG. 1, the air conditioning unit 2 includes a unit case 21, an evaporator 22, a heater core 23, an air mix door 24, a differential door 25, a max cool door 26, a vent door 27, a rear vent door 28, And a foot door 29. The mixing ratio of the cool air passing through the evaporator 22 and the warm air passing through the heater core 23 is controlled by the door position of the air mix door 24. The conditioned air created by the mixing ratio of the cold air and the hot air is selected from among the ducts 3, 4, 5 and 6 connected to the unit case 21, and the selected blowing mode (bent mode, bi-level mode, It is blown out into ducts corresponding to foot mode, differential / foot mode, differential mode, etc.

  As shown in FIG. 1, one end of the front vent duct 3 is connected to a case outlet having a vent door 27 of the unit case 21, and side ventilators 31 and 32 and center ventilators 33 and 34 are connected to the other end. It is open. From these ventilators 31, 32, 33 and 34, a vent wind is blown out toward the upper half of the front seat occupant.

  As shown in FIG. 1, one end of the rear vent duct 4 is connected to a case outlet having a rear vent door 28 of the unit case 21, and rear ventilators 41 and 42 are opened at the other end. From the rear ventilators 41 and 42, rear vent air is blown out toward the upper half of the rear seat occupant.

  As shown in FIG. 1, the differential duct 5 has one end connected to a case outlet having a differential door 25 of the unit case 21, and side defrosters 51 and 52 and a center defroster 53 are opened at the other end. From the side defrosters 51, 52, a differential wind is blown toward the inner surface of the front side glass, and from the center defroster 53, a differential wind is blown toward the inner surface of the windshield.

  As shown in FIG. 1, one end of the foot duct 6 is connected to a case outlet having the foot door 29 of the unit case 21, and the front foot outlet 61, 62, 63 and the rear foot outlet are connected to the other end. 64 and 65 are opened. From the front foot outlets 61, 62, 63, a foot wind blows toward the feet of the front seat occupant, and from the rear foot outlets 64, 65, a foot wind blows toward the feet of the rear seat occupant. Is done.

  As shown in FIG. 1, the fragrance unit 7 is connected to a unit case 21 of the air conditioning unit 2, and is a front vent duct 3 (air conditioning wind duct) that guides vent air to the positions of the ventilators 31, 32, 33, and 34. Among these, it arrange | positions in the position between the adjacent center ventilators 33 and 34 (vehicle interior blower outlet).

  FIG. 2 is a cross-sectional plan view illustrating the fragrance unit installed in the front vent duct of the vehicle air conditioner according to the first embodiment. FIG. 3 is an exploded perspective view showing the fragrance unit installed in the front vent duct of the vehicle air conditioner according to the first embodiment.

As shown in FIGS. 2 and 3, the fragrance unit 7 disposed in the front vent duct 3 of the first embodiment includes a unit support frame 71, an outer cylinder 72 (outer cylinder), and an inner cylinder 73 (inner cylinder). A spring 74, a passage opening / closing structure 75, a solid solvent 76, a solvent holding member 77, and a solvent exchange knob 78.
Here, the solid solvent 76 is not limited to fragrance, but a component having a single action or combined action such as deodorizing, deodorizing, deodorizing, sterilizing, antibacterial, and antifungal is dissolved in a volatile solid agent. It is a thing.

  As shown in FIG. 2, the front vent duct 3 has a unit hole 35 at a position where the fragrance unit 7 is attached, and is fixed to the support ring 36 at the position of the unit hole 35. Center ventilators 33 and 34 are set at positions on both sides of the support ring 36, and louver blades 33a and 33b for changing the direction of the conditioned air into the passenger compartment 8 are respectively provided in the center ventilators 33 and 34. Louver wings 34a and 34b are provided.

  As shown in FIG. 2, the fragrance unit 7 has a solvent composed of a solid solvent 76, a solvent holding member 77, and a solvent exchange knob 78 for the unit support frame 71 fixed to the support ring 36 of the front vent duct 3. The system parts are detachably provided from the external position of the front vent duct 3. The installed state of the solvent-based parts 76, 77, 78 is indicated by a solid line in FIG. 2, and the removed state of the solvent-based parts 76, 77, 78 is indicated by a virtual line in FIG.

  The fragrance unit 7 has a solid solvent 76 that volatilizes fragrance components in a double cylinder (hereinafter referred to as “double cylinders 72, 73”) formed by an outer cylinder 72 and an inner cylinder 73 that are slidably fitted. While covering, the cylinder end face is made into the dynamic pressure receiving surface of an air conditioning wind by making the cylinder axis CL of the double cylinders 72 and 73 correspond with the air conditioning wind direction W. In the first embodiment, as shown in FIG. 2, the outer cylinder 72 is fixed to the unit support frame 71, and the inner cylinder 73 is slidably fitted to the fixed outer cylinder 72. And the spring 74 which opposes the dynamic pressure which acts toward the downstream of an air conditioned wind, and provides urging | biasing force toward the upstream of an air conditioned wind is set to the inner side cylinder 73. FIG.

  The passage opening / closing structure 75 is provided in the outer cylinder 72 and the inner cylinder 73, and when dynamic pressure is generated by the conditioned air, the conditioned air introduced from the outside to the inside of the double cylinders 72, 73 is again the double cylinders 72, 73. The fragrance passage returning to the outside is opened, and when there is no air-conditioning wind, the fragrance passage is closed. In Example 1, when the dynamic pressure generated by the conditioned air is generated, the inner cylinder 73 is moved to the downstream side of the conditioned air by the dynamic pressure exceeding the spring biasing force to open the aroma passage (see FIGS. 4 and 5). When there is no conditioned air, the inner cylinder 73 moves to the upstream side of the conditioned air by the spring biasing force and closes the aroma passage (see FIG. 2).

  2 and 3, the passage opening / closing structure 75 includes a first inflow opening 75a and a first outflow opening 75b formed in the outer cylinder 72, and a second outflow / inflow opening 75c (formed in the inner cylinder 73). A second inflow opening and a second outflow opening). When there is no conditioned air, as shown in FIG. 2, the first inflow opening 75a and the second inflow / outflow opening 75c (second inflow opening), and the first outflow opening 75b and the second outflow / inflow opening 75c. The (second outflow opening) is set as an offset setting that avoids opening communication that is an overlap of opening positions.

  As shown in FIG. 3, the outer cylinder 72 has a cylindrical shape with a cylindrical end face closed. A circular first inflow opening 75 a is formed in the outer cylinder 72 in the vicinity of the center of the cylinder end surface, and a square first outflow opening 75 b is formed at a position on the cylinder side surface downstream of the solid solvent 76.

  As shown in FIG. 3, the inner cylinder 73 has a cylindrical shape with a cylindrical end face closed. In the inner cylinder 73, a second inflow / outlet opening 75c is formed continuously in the longitudinal direction from the outer peripheral position of the cylinder end surface to the middle position of the cylinder side surface downstream of the solid solvent when the air-conditioning wind dynamic pressure is generated. is doing. Four second inflow / outflow openings 75c are provided at equal intervals in the circumferential direction.

Next, the operation will be described.
The operation of the vehicle air conditioner according to the first embodiment will be described by dividing it into “aroma component diffusion suppression effect”, “aroma unit setting position restriction exclusion effect”, and “aroma effect when vent mode is selected”.

[Diffusion control of aromatic components]
The air passage is closed by the passage opening / closing structure 75 provided in the outer cylinder 72 and the inner cylinder 73 when the air conditioning is stopped or when the air conditioning operation is performed by selecting a mode other than the vent mode, and there is no conditioned air from the front vent duct 3. The solid cylinder 76 is kept covered in a sealed state by the double cylinders 72 and 73 formed by the outer cylinder 72 and the inner cylinder 73, and the action of suppressing the diffusion of the fragrance component and the like contained in the solid solvent 76 is exhibited.

  That is, when there is no conditioned air, the inner cylinder 73 is set to a position (abutting position with the outer cylinder 72) moved to the upstream side of the conditioned air as shown in FIG. The inner cylinder 73 is in close contact with the inner surface of the cylinder 72. In this state, the first inflow opening 75a and the second outflow / inflow opening 75c constituting the passage opening / closing structure 75, and the first outflow opening 75b and the second outflow / inflow opening 75c may be overlapped to be in a communication state. In addition, a sealed space in which the conditioned air does not flow is formed inside the double cylinders 72 and 73.

  Therefore, since the diffusion of the fragrance component and the like contained in the solid solvent 76 is suppressed before boarding the vehicle in which the air conditioning is stopped, it is possible to prevent excessive fragrance when boarding the vehicle. In addition, when the vehicle is parked for a long period of time and the like, it is suppressed that the fragrance component etc. is diffused unnecessarily. Compared with the case where it remains as it is, the lifetime of the solid solvent 76 can be extended significantly.

[Exclusion action of setting position restriction of aroma unit]
When traveling with the vent mode selected, and when dynamic pressure is generated by the conditioned air (vent air), the dynamic pressure of the conditioned air is received at the end surfaces of the double cylinders 72 and 73, and the airflow resistance is reduced. It is suppressed to a small size and has the effect of keeping the dynamic pressure receiving area constant regardless of the air flow rate.

  Therefore, when dynamic pressure is generated by the conditioned air, the ventilation resistance to the conditioned air does not fluctuate, and the air distribution amount of the conditioned air is stabilized and the air temperature is stabilized. That is, there is no restriction on the setting position of the fragrance unit 7.

  In addition, in the first embodiment, the passage opening / closing structure 75 has an opening structure of a first inflow opening 75a, a first outflow opening 75b, and a second outflow / inflow opening 75c, and there is no member protruding outward from the outer cylinder 72. It is said. For this reason, the effect | action which suppresses the increase in ventilation resistance of the conditioned air (vent air) which flows around the fragrance unit 7 although it has arrange | positioned the fragrance unit 7 to an air-conditioning wind path | route is shown.

  Therefore, when dynamic pressure is generated by the conditioned air, the increase in ventilation resistance to the conditioned air is suppressed to a small level, and the air distribution amount and the air temperature of the air conditioned air do not change depending on the presence or absence of the fragrance unit 7. Stabilization of air conditioning temperature is ensured. That is, there is no restriction on the setting position of the fragrance unit 7.

  In the case of the first embodiment, by utilizing the fact that the setting position of the fragrance unit 7 is not restricted, the fragrance unit 7 is connected to the adjacent center ventilator 33 in the front vent duct 3 as shown in FIG. , 34, and as shown in FIG. 2, solvent-based parts 76, 77, and 78 are detachably attached to the unit support frame 71 from an external position of the front vent duct 3.

  Therefore, when the solid solvent 76 is consumed and needs to be replaced, the solvent replacement knob 78 is gripped, and the solvent components 76, 77, 78 are removed as shown by the phantom lines in FIG. Replace with a new one. Then, after the replacement of the solid solvent 76, the solvent replacement knob 78 is gripped and inserted to the position shown by the solid line in FIG. 2, and the solvent-based parts 76, 77, 78 are attached. Can be replaced.

[Aroma action when vent mode is selected]
FIG. 4 is an operation explanatory diagram illustrating the aroma action by the aroma unit when the air-conditioning air volume is small in the vehicle air conditioner of the first embodiment. FIG. 5 is an operation explanatory diagram illustrating the aroma action by the aroma unit when the air-conditioning air volume is large in the vehicle air conditioner of the first embodiment.

  When running with the vent mode selected, and when dynamic pressure is generated by the conditioned air (vent air), the aroma passage F is opened by the passage opening / closing structure 75 provided in the outer cylinder 72 and the inner cylinder 73. An operation of returning the conditioned air introduced from the outside of the heavy cylinders 72 and 73 into the double cylinders 72 and 73 having the solid solvent 76 to the outside of the double cylinders 72 and 73 again is shown.

  Therefore, when the conditioned air is blown into the passenger compartment 8, the fragrance component volatilized from the solid solvent 76 on the conditioned air (vent air) blown from the center ventilators 33, 34 diffuses into the passenger compartment 8 and the fragrance. The effect will be demonstrated.

  Further, when the dynamic pressure is generated by the conditioned air, the inner cylinder 73 moves to the downstream side of the conditioned air by the generation of the dynamic pressure exceeding the urging force of the spring 74 and opens the fragrance passage F. In this case, since the dynamic pressure is small when the air volume of the conditioned air is small, the downstream side movement amount of the inner cylinder 73 is small, and the outflow side opening area S1 is narrowed as shown in FIG. When the air volume of the conditioned air increases, the dynamic pressure increases according to the air volume, so that the downstream side movement amount of the inner cylinder 73 increases, and as shown in FIG. 5, the outflow side opening area S2 (> S1) is increased. Become wider.

  Thus, as the air volume of the conditioned air increases, the outflow side opening area of the fragrance passage F can be expanded and the fragrance action in the passenger compartment 8 can be enhanced. Further, by changing and setting the magnitude of the urging force of the spring 74, for example, it can be adjusted so as to obtain an optimal aroma action according to the internal volume of the passenger compartment 8 or the demand of the occupant.

  Furthermore, the fragrance passage F (arrows in FIGS. 4 and 5) introduces conditioned air from the first inflow opening 75a regardless of the size of the outflow side opening area, and the introduced conditioned air flows into the second inflow / outlet opening 75c. And flows along the solid solvent 76 in the double cylinders 72 and 73, and the conditioned air containing the fragrance component passes through the second inflow / outlet opening 75c and the first outflow opening 75b to the conditioned air path again. It is formed as an outflow passage.

  Thus, since the fragrance passage F is formed by a smooth streamline from the upstream side to the downstream side of the conditioned air, the conditioned air flows smoothly along the solid solvent 76 and the ventilation resistance is increased by the fragrance passage F. Can be suppressed.

Next, the effect will be described.
In the vehicle air conditioner of the first embodiment, the effects listed below can be obtained.

  (1) In the vehicle air conditioner in which the fragrance unit 7 is disposed in the conditioned air path from the air intake port to the air outlet to the vehicle interior, the fragrance unit 7 is slidably fitted to an outer cylinder ( The double cylinders 72 and 73 including the outer cylinder 72) and the inner cylinder (inner cylinder 73) cover the solid solvent 76 that volatilizes the aromatic component, and the cylinder axis CL of the double cylinders 72 and 73 is upstream of the conditioned air. The cylinder end surface is made to be a dynamic pressure receiving surface of the conditioned air, and when the dynamic pressure due to the conditioned air is generated on the outer cylinder and the inner cylinder, A fragrance passage F for returning the conditioned air introduced from the outside of the heavy cylinders 72 and 73 to the outside of the double cylinders 72 and 73 is opened again. When there is no conditioned air, a passage opening / closing structure 75 for closing the fragrance passage F is provided. Provided. For this reason, ensuring of the setting position freedom degree of the fragrance unit 7 and the fragrance effect accompanying the conditioned air blowing into the passenger compartment 8 can be achieved.

  (2) The fragrance unit 7 fixes the outer cylinder (outer cylinder 72) to the unit support frame 71, and slidably fits the inner cylinder (inner cylinder 73) to the fixed outer cylinder. The inner cylinder is provided with a spring 74 that applies a biasing force that opposes the dynamic pressure acting toward the downstream side of the conditioned air, and the passage opening / closing structure 75 has a spring biasing force when a dynamic pressure is generated by the conditioned air. The inner cylinder moves to the downstream side of the conditioned air by the dynamic pressure exceeding the pressure to open the fragrance passage F, and when there is no conditioned air, the inner cylinder moves to the upstream side of the conditioned air by the spring biasing force. The passage F is closed. For this reason, as the circulating air volume of the conditioned air increases, the fragrance action in the passenger compartment 8 can be enhanced, and adjustment is made so as to obtain the optimum fragrance action by changing and setting the magnitude of the biasing force of the spring 74. Can do.

  (3) The passage opening / closing structure 75 includes a first inflow opening 75a and a first outflow opening 75b formed in the outer cylinder (outer cylinder 72), and a second inflow opening formed in the inner cylinder (inner cylinder 73). The second inflow / outflow opening 75c) and the second outflow opening (the second outflow / inflow opening 75c) have a structure, and when there is no conditioned air, the first inflow opening 75a and the second inflow opening The (second inflow / outlet opening 75c) and the first outflow opening 75b and the second outflow opening (second outflow / inlet opening 75c) have a structure by offset setting that avoids overlapping of the opening positions. For this reason, when dynamic pressure is generated by the conditioned air, the use of the opening structure as the passage opening / closing structure 75 suppresses an increase in ventilation resistance with respect to the conditioned air, and does not restrict the setting position of the fragrance unit 7. .

  (4) The outer cylinder is a cylindrical outer cylinder 72 with a cylinder end face closed, the first inflow opening 75a is formed near the center of the cylinder end face of the outer cylinder 72, and the solid solvent of the outer cylinder 72 is formed. The first outflow opening 75b is formed at the position of the cylinder side surface downstream of 76, and the inner cylinder is a cylindrical inner cylinder 73 with the cylinder end face closed, and the outer circumference of the cylinder end face of the inner cylinder 73 is formed. The second inflow opening (second outflow / outlet opening 75c) is formed, and the second outflow opening (second outflow opening) is formed on a cylindrical side surface of the inner cylinder 73 that is downstream of the solid solvent 76 when air-conditioning wind dynamic pressure is generated. A double-use opening 75c) was formed. For this reason, the fragrance passage F becomes a smooth streamline from the upstream side of the conditioned air to the downstream side along the solid solvent 76, and an increase in ventilation resistance due to the fragrance passage F formed in the fragrance unit 7 can be suppressed. .

(5) The second inflow opening and the second outflow opening of the inner cylinder 73 are second inflow / outflow openings 75c formed continuously in the longitudinal direction from the outer peripheral position of the cylinder end surface to the middle position of the cylinder side surface. Therefore, two functions of the second inflow opening function and the second outflow opening function can be realized by one second outflow / inflow opening 75c, and the processing of the opening with respect to the inner cylinder 73 can be simplified. .
When a plurality of second inflow / outflow openings 75c are provided, the change characteristic of the aroma action due to the magnitude of dynamic pressure is optimized by changing the length of the second inflow / outlet openings 75c in the longitudinal direction. Can do. The fragrance action can also be adjusted by changing and setting the length of the second inflow / outflow opening 75c in the longitudinal direction while the biasing force of the spring 74 remains fixed.

  (6) The fragrance unit 7 is disposed at a position of an air-conditioning air duct (front vent duct 3) having an air-conditioning air outlet (center ventilators 33, 34) into the passenger compartment 8, and is disposed on the air-conditioning air duct side. A solvent holding member 77 for holding the solid solvent 76 is detachably attached to the fixed unit support frame 36 from an external position of the air-conditioning air duct. For this reason, when the solid solvent 76 is consumed, the solid solvent 76 covered with the double cylinders 72 and 73 can be easily replaced from the inside of the passenger compartment 8.

  The second embodiment is an example in which an independent second inflow opening and second outflow opening are formed in the inner cylinder instead of the second outflow / inflow opening of the first embodiment.

First, the configuration will be described.
FIG. 6 is an exploded perspective view showing the fragrance unit installed in the front vent duct of the vehicle air conditioner according to the second embodiment.

  As shown in FIG. 6, the fragrance unit 7 disposed in the front vent duct 3 of Example 2 includes a unit support frame 71, an outer cylinder 72 (outer cylinder), an inner cylinder 73 (inner cylinder), and a spring. 74, a passage opening / closing structure 75, a solid solvent 76, a solvent holding member 77, and a solvent exchange knob 78.

  As shown in FIG. 6, the inner cylinder 73 has a cylindrical shape with a cylindrical end face closed. The inner cylinder 73 is formed with a second inflow fan-shaped opening 75d (second inflow opening) in the outer peripheral portion of the cylinder end surface, and the second outflow is generated on the cylinder side surface downstream of the solid solvent 76 when the air-conditioning wind dynamic pressure is generated. An opening 75e is formed.

As shown in FIG. 6, the second inflow fan-shaped opening 75d is opened in a donut shape along the outer periphery of the cylinder end surface of the inner cylinder 73. By connecting the gaps with radial ribs 75h, a plurality of rings are formed in an annular shape.
Since other configurations are the same as those of the first embodiment, the corresponding components are denoted by the same reference numerals and description thereof is omitted.

Next, the operation will be described.
The operation of the vehicle air conditioner according to the second embodiment will be described by dividing it into “aroma component diffusion suppression effect” and “aroma effect when vent mode is selected”.

[Diffusion control of aromatic components]
FIG. 7 is an operation explanatory diagram illustrating the diffusion suppressing action of the fragrance component when there is no conditioned air in the vehicle air conditioner of the second embodiment.

  A passage opening / closing structure provided in the outer cylinder 72 and the inner cylinder 73 in the same manner as in the first embodiment when the air conditioning is stopped or when the air conditioning operation is performed by selecting a mode other than the vent mode and there is no conditioned air from the front vent duct 3. 75, the fragrance passage is closed, and the solid cylinder 76 is kept covered in a sealed state by the double cylinders 72 and 73 formed by the outer cylinder 72 and the inner cylinder 73, and diffusion of fragrance components contained in the solid solvent 76 is suppressed. Shows the effect of

  At this time, in the second embodiment, the opening formed in the inner cylinder 73 is not limited to the second inflow / outflow opening 75c as in the first embodiment, but in the second inflow fan-shaped opening 75d and the second outflow opening 75e. It is divided. For this reason, as shown in FIG. 7, the length for sealing the gap between the outer cylinder 72 and the inner cylinder 73 is secured longer than in the case of the first embodiment (see FIG. 2). The sealing performance in the circumferential direction is improved.

  Therefore, the sealing property of the solid solvent 76 covered with the double cylinders 72 and 73 is better than that of the first embodiment, and it is possible to reliably prevent excessive aroma when getting into the vehicle. In addition, when the vehicle is parked for a long period of time, it is possible to effectively suppress the diffusion of the fragrance component and the like, so that the life of the solid solvent 76 can be extended as compared with the first embodiment.

[Aroma action when vent mode is selected]
FIG. 8 is an operation explanatory diagram showing an aroma action when the vent mode is selected in the vehicle air conditioner of the second embodiment.

  When running with the vent mode selected, etc., and when dynamic pressure is generated by the conditioned air (vent air), the passage opening / closing structure 75 provided in the outer cylinder 72 and the inner cylinder 73 is used for fragrance as in the first embodiment. The passage F is opened, and the conditioned air introduced into the double cylinders 72 and 73 having the solid solvent 76 from the outside of the double cylinders 72 and 73 is returned to the outside of the double cylinders 72 and 73 again.

  At this time, in the second embodiment, a plurality of second inflow fan-shaped openings 75d are formed annularly on the end surface of the inner cylinder 73, so that the inflow opening area of the inner cylinder 73 is wider and uniform than in the first embodiment. The air permeability of the fragrance passage F in the double cylinders 72 and 73 is improved.

Therefore, when the conditioned air is blown into the passenger compartment 8, the fragrance component is effectively volatilized from the solid solvent 76 on the conditioned air blown from the center ventilators 33 and 34, and the fragrance action higher than that of the first embodiment is exhibited. Will be.
Since other operations are the same as those of the first embodiment, description thereof is omitted.

Next, the effect will be described.
In the vehicle air conditioner of the second embodiment, in addition to the effects (1) to (4) and (6) of the first embodiment, the following effects can be obtained.

  (7) The second inflow opening of the inner cylinder 73 is opened in a donut shape along the outer periphery of the cylinder end surface, and a radial rib 75h is formed between the closed portion 75f at the center of the cylinder end surface and the outer peripheral edge 75g of the cylinder end surface. A plurality of second inflow fan-shaped openings 75d coupled together. For this reason, the solid solvent 76 can have a longer life than that of the first embodiment and can exhibit a higher fragrance effect than that of the first embodiment.

  The third embodiment is an example in which a member that enhances a sealing function and a guide function is added to the configuration of the inner inner cylinder of the second embodiment.

First, the configuration will be described.
FIG. 9 is an exploded perspective view showing the fragrance unit provided in the front vent duct of the vehicle air conditioner according to the third embodiment.

  As shown in FIG. 9, the fragrance unit 7 disposed in the front vent duct 3 of Example 3 includes a unit support frame 71, an outer cylinder 72 (outer cylinder), an inner cylinder 73 (inner cylinder), and a spring. 74, a passage opening / closing structure 75, a solid solvent 76, a solvent holding member 77, and a solvent exchange knob 78.

  As shown in FIG. 9, the inner cylinder 73 has a cylindrical shape with a cylindrical end face closed. The inner cylinder 73 is formed with a second inflow fan-shaped opening 75d (second inflow opening) in the outer peripheral portion of the cylinder end surface, and the second outflow is generated on the cylinder side surface downstream of the solid solvent 76 when the air-conditioning wind dynamic pressure is generated. An opening 75e is formed.

  As shown in FIG. 9, the second inflow fan-shaped opening 75d is opened in a donut shape along the outer periphery of the cylinder end surface of the inner cylinder 73, and the projection closing portion 75i at the center position of the cylinder end surface and the outer peripheral edge 75g of the cylinder end surface. By connecting the gaps with radial ribs 75h, a plurality of rings are formed in a ring shape.

As shown in FIG. 9, the protrusion blocking portion 75i has a cylindrical protrusion shape having an outer diameter slightly smaller than the inner diameter of the first inflow opening 75a of the outer cylinder 72, and protrudes toward the upstream side of the flow of the conditioned air. Formed.
Since other configurations are the same as those of the first embodiment, the corresponding components are denoted by the same reference numerals and description thereof is omitted.

Next, the operation will be described.
The operation of the vehicle air conditioner according to the third embodiment will be described by dividing it into “aroma component diffusion suppressing effect” and “aroma effect when vent mode is selected”.

[Diffusion control of aromatic components]
FIG. 10 is an operation explanatory view showing the diffusion suppressing action of the aroma component when there is no conditioned air in the vehicle air conditioner of the third embodiment.

  A passage opening / closing structure provided in the outer cylinder 72 and the inner cylinder 73 in the same manner as in the first embodiment when the air conditioning is stopped or when the air conditioning operation is performed by selecting a mode other than the vent mode and there is no conditioned air from the front vent duct 3. 75, the fragrance passage is closed, and the solid cylinder 76 is kept covered in a sealed state by the double cylinders 72 and 73 formed by the outer cylinder 72 and the inner cylinder 73, and diffusion of fragrance components contained in the solid solvent 76 is suppressed. Shows the effect of

  And since the opening formed in the inner side cylinder 73 is divided into the 2nd inflow fan-shaped opening 75d and the 2nd outflow opening 75e like Example 2, as shown in FIG. 10, as shown in FIG. The length for sealing the gap is ensured longer than in the case of the first embodiment (see FIG. 2), and the sealing performance in the circumferential direction is improved.

  In addition, in the case of the third embodiment, the protrusion blocking portion 75i of the inner cylinder 73 is fitted into the first inflow opening 75a of the outer cylinder 72 as shown in FIG. A line seal portion is formed by the outer peripheral surface and the inner peripheral surface of the first inflow opening 75a.

  Therefore, the sealing property of the solid solvent 76 covered by the double cylinders 72 and 73 is further improved than that of the second embodiment, and it is possible to reliably prevent excessive aroma when getting into the vehicle. In addition, when the vehicle is parked for a long period of time, it is possible to effectively prevent the fragrance components and the like from diffusing wastefully, so that the life of the solid solvent 76 can be extended as compared with the second embodiment.

[Aroma action when vent mode is selected]
FIG. 11 is an operation explanatory diagram illustrating an aroma effect when the vent mode is selected in the vehicle air conditioner of the third embodiment.

  When running with the vent mode selected, etc., and when dynamic pressure is generated by the conditioned air (vent air), the passage opening / closing structure 75 provided in the outer cylinder 72 and the inner cylinder 73 is used for fragrance as in the first embodiment. The passage F is opened, and the conditioned air introduced into the double cylinders 72 and 73 having the solid solvent 76 from the outside of the double cylinders 72 and 73 is returned to the outside of the double cylinders 72 and 73 again.

  In the same manner as in the second embodiment, the second inflow fan-shaped opening 75d formed in a ring shape on the cylindrical end surface of the inner cylinder 73 has a larger and more uniform inflow opening area in the inner cylinder 73 than in the first embodiment. The air permeability of the fragrance passage F in the double cylinders 72 and 73 is improved.

  In addition, in the case of the third embodiment, the protrusion blocking portion 75i of the inner cylinder 73 causes the flow of the conditioned air introduced from the first inlet opening 75a of the outer cylinder 72 as shown in FIG. It becomes a guide led to 75d, and the air permeability of the aroma passage F in the double cylinders 72 and 73 is improved.

Therefore, when the conditioned air is blown into the passenger compartment 8, the fragrance component is effectively volatilized from the solid solvent 76 on the conditioned air blown from the center ventilators 33 and 34, and the fragrance action higher than that of the second embodiment is exhibited. Will be.
Since other operations are the same as those of the first embodiment, description thereof is omitted.

Next, the effect will be described.
In the vehicle air conditioner of the third embodiment, the following effects can be obtained in addition to the effects (1) to (4) and (6) of the first embodiment.

  (8) At the center position of the cylinder end surface of the inner cylinder 73, a protrusion closing portion 75i protruding toward the upstream side of the flow of the conditioned air is formed. For this reason, the solid solvent 76 can have a longer life than that of the second embodiment and can exhibit a higher fragrance effect than that of the second embodiment.

  As mentioned above, although the vehicle air conditioner of this invention has been demonstrated based on Example 1-3, it is not restricted to these Examples about a concrete structure, Each claim of a claim Design changes and additions are permitted without departing from the spirit of the invention according to the paragraph.

  In Examples 1 to 3, examples in which an outer cylinder and an inner cylinder having a circular cylinder cross-sectional shape are used as the outer cylinder and the inner cylinder. However, the cross-sectional shape of the cylinder is not limited to a circle, and may be an ellipse, an oval, a polygon, or the like.

  In Examples 1 to 3, the inner cylinder, which is the inner cylinder, of the outer cylinder and the inner cylinder receives the dynamic pressure of the conditioned air and slides on the inner surface of the outer cylinder. However, of the outer cylinder and the inner cylinder, the outer cylinder, which is the outer cylinder, may slide on the outer surface of the inner cylinder by receiving the dynamic pressure of the conditioned air. The inner cylinders may be slid differently under the dynamic pressure of the conditioned air.

  In Examples 1 to 3, the example in which the fragrance unit is set at the position of the front vent duct in consideration of the exchangeability of the solid solvent is shown. However, the fragrance unit may be disposed at any position in the conditioned air path from the air intake port to the air outlet into the vehicle compartment.

  In the first to third embodiments, an application example to a vehicle air conditioner that performs heating or cooling according to temperature information or the like has been described. However, a vehicle air conditioner that performs only heating or a vehicle air conditioner that performs only cooling. The present invention can also be applied to various vehicle air conditioners such as a vehicle air conditioner that performs apparatus heating and air cleaning.

1 is an overall system diagram illustrating an example of a vehicle air conditioner including an aroma unit according to Embodiment 1. FIG. It is a cross-sectional top view which shows the fragrance unit with which the front vent duct of the vehicle air conditioner of Example 1 was equipped. It is a disassembled perspective view which shows the fragrance unit with which the front vent duct of the vehicle air conditioner of Example 1 was equipped. It is an effect explanatory view showing an aroma action by an aroma unit when the amount of conditioned air is small in the vehicle air conditioner of the first embodiment. It is an effect explanatory view showing an aroma action by an aroma unit when the amount of air-conditioning air is large in the vehicle air conditioner of the first embodiment. It is a disassembled perspective view which shows the fragrance unit with which the front vent duct of the vehicle air conditioner of Example 2 was equipped. FIG. 6 is an operation explanatory diagram showing an action of suppressing the diffusion of fragrance components when there is no conditioned air in the vehicle air conditioner of Example 2. It is an effect explanatory view showing the aroma action at the time of vent mode selection in the air harmony device for vehicles of Example 2. It is a disassembled perspective view which shows the fragrance unit with which the front vent duct of the vehicle air conditioner of Example 3 was equipped. It is an action explanatory view showing the diffusion suppression action of an aroma component when there is no conditioned air in the air conditioning system for vehicles of Example 3. It is an effect explanatory view showing an aroma action at the time of vent mode selection in a vehicle air harmony device of Example 3.

Explanation of symbols

1 Blower unit 2 Air conditioning unit 3 Front vent duct (air conditioning duct)
33, 34 Center ventilator (vehicle outlet)
35 unit hole 36 unit support frame 36 support ring 4 rear vent duct 5 differential duct 6 foot duct 7 aroma unit 71 unit support frame 72 outer cylinder (outer cylinder)
73 Inner cylinder (inner cylinder)
74 Spring 75 Passage opening / closing structure 75a First inflow opening 75b First outflow opening 75c Second outflow / inflow opening (second inflow opening, second outflow opening)
75d Second inflow fan-shaped opening (second inflow opening)
75e 2nd outflow opening 75f Blocking part 75g Outer peripheral edge part 75h Radial rib 75i Projection blocking part 76 Solid solvent 77 Solvent holding member 78 Solvent exchange knob
CL Tube axis F Aroma passage
S1 Outlet side opening area
S2 Outlet side opening area W Air conditioning wind direction

Claims (8)

In the vehicle air conditioner in which the fragrance unit is arranged in the conditioned air path from the air intake port to the air outlet to the vehicle interior,
The fragrance unit covers a solid solvent that volatilizes fragrance components with a double cylinder composed of an outer cylinder and an inner cylinder slidably fitted, and directs the cylinder axis of the double cylinder toward the upstream side of the conditioned air. The cylinder end surface is used as the dynamic pressure receiving surface of the conditioned air,
When dynamic pressure due to the conditioned air is generated in the outer cylinder and the inner cylinder, the conditioned air introduced from the outside to the inside of the double cylinder is again introduced into the double cylinder by the dynamic pressure of the conditioned air received by the dynamic pressure receiving surface. An air conditioning apparatus for a vehicle, comprising a passage opening / closing structure that opens an aroma passage returning to the outside of a cylinder and closes the aroma passage when there is no conditioned air. The vehicle air conditioner according to claim 1,
The fragrance unit fixes the outer cylinder to a unit support frame, slidably fits the inner cylinder to the fixed outer cylinder, and acts on the inner cylinder toward the downstream side of the conditioned air. Set a spring that gives a biasing force against the dynamic pressure,
The passage opening / closing structure is provided with a spring when the inner cylinder moves to the downstream side of the air-conditioning air by the dynamic pressure exceeding the spring biasing force when the dynamic pressure is generated by the air-conditioning air, and opens the aromatic passage. An air conditioner for a vehicle characterized in that the inner cylinder moves to the upstream side of the conditioned air by power to close the fragrance passage. The vehicle air conditioner according to claim 1 or 2,
The passage opening / closing structure is a structure having a first inflow opening and a first outflow opening formed in the outer cylinder, and a second inflow opening and a second outflow opening formed in the inner cylinder, and conditioned air When there is not, the first inflow opening and the second inflow opening, and the first outflow opening and the second outflow opening have a structure with an offset setting that avoids overlapping of the opening positions. Air conditioner. In the vehicle air conditioner according to claim 3,
The outer cylinder is a cylindrical outer cylinder with a cylindrical end surface closed, the first inflow opening is formed in the vicinity of the center of the cylindrical end surface of the outer cylinder, and the outer cylinder has a cylindrical side surface downstream of the solid solvent. Forming the first outflow opening at a position;
The inner cylinder is a cylindrical inner cylinder with a cylinder end surface closed, and the second inflow opening is formed in the outer peripheral portion of the cylinder end surface of the inner cylinder, and when the air-conditioning wind dynamic pressure is generated, The air conditioning apparatus for a vehicle, wherein the second outflow opening is formed on a cylindrical side surface of the inner cylinder. The vehicle air conditioner according to claim 4,
The second inflow opening and the second outflow opening of the inner cylinder are second inflow / outlet openings formed continuously in the longitudinal direction from the outer peripheral position of the cylinder end surface to the middle position of the cylinder side surface. Air conditioner. The vehicle air conditioner according to claim 4,
The second inflow opening of the inner cylinder is opened in a donut shape along the outer periphery of the cylinder end surface, and a plurality of second inflows are formed by connecting the closed portion at the center position of the cylinder end surface and the outer peripheral edge portion of the cylinder end surface with radial ribs. A vehicle air conditioner having an inflow fan-shaped opening. The vehicle air conditioner according to claim 6,
A vehicular air conditioner, wherein a protrusion blocking portion protruding toward the upstream side of the flow of conditioned air is formed at the center position of the cylinder end surface of the inner cylinder. The vehicle air conditioner according to any one of claims 1 to 7,
The fragrance unit is disposed at a position of an air-conditioning air duct having an air-conditioning air outlet to the vehicle interior, and a solvent holding member for holding a solid solvent is provided to the unit support frame fixed to the air-conditioning air duct side. An air conditioner for a vehicle, wherein the air conditioner is provided so as to be detachable from an external position of the conditioned air duct.

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