JP2007125955A - Air conditioning device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent collection of warm air around a vent opening part of when a defroster opening part of is closed in a unit case, and feed sufficient warm air from a foot opening part even in a bi-level mode. <P>SOLUTION: This air conditioning device for a vehicle is provided with a baffle plate 10 for regulating flow of warm air and cold air at a combining part for the warm air and the cold air in the unit case. The baffle plate 10 has a warm air guide passage to guide the warm air to a space on the side where the defroster opening part 15 is formed, and a cold air guide passage to guide the cold air to a space on the side where the bent opening part 16 and the foot opening part 17 are formed. When the defroster opening part 15 is closed, at least part of an opening part of the warm air guide passage in the baffle plate 10 on the side of the defroster opening part 15 is closed with the defroster opening part 15 or a member integrated with it. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a structure for adjusting the flow of hot air and cold air in a unit case that houses an evaporator, a heater core, and the like in a vehicle air conditioner.

  In a vehicle air conditioner, a baffle plate is used as means for rectifying hot air and cold air in a unit case. FIG. 6 shows a conventional air conditioner equipped with a baffle plate. The air conditioner 100 includes a unit case 101 in which an evaporator 102, a heater core 103, a hot air / cold air switching door 104, a defrost opening / closing door 105, a vent opening / closing door 106, a foot opening / closing door 107, and a baffle plate 108 are arranged. ing. The unit case 101 has a defrost opening 110, a vent opening 111, and a foot opening 112. The baffle plate 108 is disposed at a junction between the hot air passage 120 in which the heater core 103 is disposed and the cold air passage 121 that bypasses the heater core 103 on the downstream side of the evaporator 102, and efficiently mixes or separates the hot air and the cold air. It is intended to do.

As for the structure of the baffle plate 108, a cold air passage hole that guides the cold air from the cold air passage 121 toward the vent opening 111 as indicated by an arrow A, and the hot air from the hot air passage 120, which goes straight to the cold air passage hole Is provided with a hot air guide groove that guides the air toward the defrost opening 110 as indicated by an arrow B, and at least a part of the cold air passage hole communicates with the hot air passage 120 (Patent Document 1). reference).
JP 2004-237940 A (see FIGS. 4 and 6)

  However, in the above-described conventional structure, when the defrost opening 110 is closed, the warm air B tends to be biased to the upper side of the ventilation space 125 (near the vent outlet 111), and the conditioned air from the vent opening 111 and the foot opening 112. In the bi-level mode in which the air is blown out, it is difficult for hot air to come out from the foot opening 112, and there is a problem that a temperature difference occurs between the vent blown air and the foot blown air.

  Therefore, the present invention prevents the warm air from being biased to the vicinity of the vent opening when the defrost opening is closed, and ensures that sufficient warm air is sent from the foot opening even in the bi-level mode. It is to be an issue.

  In order to solve the above problems, the present invention provides a vehicle air conditioner including a baffle plate for rectifying hot air and cold air at a junction of hot air and cold air in a unit case. The plate communicates with the warm air passage in the unit case, and guides the warm air from the warm air passage to the space on the side where the defrost opening in the unit case is formed, and the unit A cold air guide path that communicates with the cold air passage in the case, guides the cold air from the cold air passage to the space on the side of the unit case where the vent opening and the foot opening are formed, and communicates with the hot air passage When the defrost opening / closing door that opens and closes the defrost opening is in the closed position, a part of the defrost opening / closing door or a member integrated with the defrost opening / closing door is used. Te, is characterized in that it has a structure for closing at least a portion of the warm air guide path of said baffle plate (claim 1).

  With this configuration, when the defrost opening is closed, that is, in the vent mode or the bi-level (vent / foot) mode, the hot air guide path of the baffle plate that guides the hot air to the upper part of the unit case is closed or the air flow rate is reduced. Therefore, the warm air is not biased to the upper part of the unit case. Thereby, since sufficient warm air can be supplied to the foot opening even in the bi-level mode, the temperature difference between the vent blowing air and the foot blowing air can be reduced. Moreover, the warm air guide path is closed by a defrost opening / closing door or a member integrated therewith, so that the number of parts is not increased.

  Further, in the configuration according to claim 1, the warm air guide path is composed of a plurality of cylindrical bodies in which the surface on the warm air path side and the surface on the defrost opening side are open, and the cold wind guide path is Preferably, each cylindrical body is formed by a gap (claim 2). In the configuration according to claim 2, when the defrost door is in the closed position, the defrost door is connected to the hot air guide path. It is preferable to contact the opening on the defrost opening side.

  With this configuration, when the defrost opening / closing door is in the closed position, the defrost opening / closing door contacts and closes the opening on the upper end side of the cylindrical body that is the hot air guiding path, so that the hot air is in the cylindrical body. Is not sent to the upper part of the unit case. Therefore, almost all the hot air is guided toward the vent opening or the foot opening via the cold air guiding path of the baffle plate. Thereby, since the warm air is not biased to the upper part of the unit case when the defrost is closed, the temperature difference between the vent blown air and the foot blown air can be reduced particularly in the bi-level mode.

  Further, in the configuration according to claim 1, the warm air guide path includes a plurality of surfaces in which a surface on the warm air passage side, a surface on the defrost opening side, and a surface on the vent opening and foot opening side are open. The cold air guide path may be formed by a gap between the groove-like bodies (Claim 4). In the configuration according to Claim 4, the defrost opening / closing door is closed. When the defrost opening / closing door is in position, the defrost opening / closing door abuts against the opening on the defrost opening side of the hot air guiding path, and a piece erected on the defrost opening / closing door is the vent opening of the hot air guiding path It is preferable to cover at least part of the surface on the side of the part and the foot opening (Claim 5).

  With this configuration, when the defrost opening / closing door is in the closed position, the defrost opening / closing door main body contacts and closes the opening on the upper end side of the groove-like body that is the hot air guiding path, and the defrost opening / closing door The piece erected on the side is closed so as to cover the vicinity of the upper end of the opening surface on the vent opening side or foot opening side of the groove-like body. For this reason, warm air is not sent from the upper end portion of the groove-like body toward the defrost opening, and almost all warm air flows from the vent opening or foot opening side of the warm air guiding path, or It is guided in the direction of the vent opening or the foot opening via the cold air guiding path. Thereby, since the warm air is not biased to the upper part of the unit case when the defrost is closed, the temperature difference between the vent blown air and the foot blown air can be reduced particularly in the bi-level mode.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the different embodiments, the description of the same or similar parts is omitted.

  The vehicle air conditioner 1 according to this embodiment shown in FIG. 1 includes an evaporator 3, a heater core 4, a hot / cold air switching door 6, a defrost opening / closing door 7, a vent opening / closing door 8, and a foot opening / closing door 9 in a unit case 2. The baffle plate 10 is arranged. The unit case 2 has an intake air opening 14 for taking in intake air sent from an intake device (not shown) that selectively takes in outside air or inside air, and blows conditioned air toward the windshield in the vehicle interior. A defrost opening 15 that communicates with the air outlet, a vent opening 16 that communicates with an air outlet that blows out conditioned air mainly from the front of the passenger in the passenger compartment, and an air outlet that blows conditioned air from the feet of the passenger in the passenger compartment A foot opening 17 is formed.

  The evaporator 3 is a device that constitutes a part of a known refrigeration cycle and cools the air by utilizing an endothermic action when the refrigerant evaporates. The heater core 4 is a device that heats air by utilizing the heat dissipation action of high-pressure refrigerant circulating in the engine cooling water or the refrigeration cycle. The hot air / cold air switching door 6 changes the amount of air that the cold air that has passed through the evaporator 3 flows into the hot air passage 20 where the heater core 4 is installed or the cold air passage 21 where the heater core 4 is not installed depending on the rotation angle. It is something to be made. The defrost opening / closing door 7 changes the amount of air that has passed through the hot air passage 20 or the cold air passage 21 and flows into the defrost opening 15. Similarly to the defrost opening / closing door 7, the vent opening / closing door 8 and the foot opening / closing door 9 change the amount of air flowing through the hot air passage 20 or the cold air passage 21 into the vent opening 16 or the foot opening 17. It is.

  The baffle plate 10 is installed at a joining portion of the hot air passage 20 and the cold air passage 21, and rectifies the hot air and the cold air so that both the air can be efficiently mixed or separated. As shown in FIGS. 2A and 2B, the baffle plate 10 includes a plurality of cylindrical bodies 25 and support members 26, 27, 28, and 29. Each cylindrical body 25 is connected by support members 26, 27, 28, and 29 with a gap 31 therebetween, and both ends of each support member 26, 27, 28, and 29 are fixed to predetermined portions of the unit case 2. ing. As a result, the baffle plate 10 is fixed to the unit case 2. Further, as shown in FIG. 2A, the lower end of the cylindrical body 25 is an opening 32, and the upper end is an opening 33 as shown in FIG. 2B. . The opening 32 on the lower end side faces the warm air passage 20 (see FIG. 1), and the opening 33 on the upper end side faces the defrost opening 15.

  With the above configuration, the warm air flows as indicated by solid arrows 45a and 45b in FIG. 3, and the cool air flows as indicated by broken arrows 46a and 46b in FIG. The warm air 45 a is an air flow that travels from the warm air passage 20 toward the defrost opening 15, and is composed of air that travels upward through the interior of the tubular body 25 of the baffle plate 10 and the gap 31 between the tubular bodies 25. The warm air 45 b is an air flow that travels from the warm air passage 20 toward the ventilation space 49 on the side of the vent outlet 16 and the foot outlet 17, and does not pass through the inside of the cylindrical body 25. The air travels around the support member 27 and travels to the ventilation passage 49 side. The cold air 46 a is an air flow that proceeds from the cold air passage 21 toward the defrost opening 15, and mainly includes air that linearly travels upward along the back surface 51 of the baffle plate 10. The cold air 46 b is an air flow that travels from the cool air passage 21 toward the ventilation space 49, and includes air that travels from the back surface 51 side of the baffle plate 10 through the gaps 31 (see FIG. 2) of the cylindrical bodies 25. The hot air 45a and the cold air 46a are not generated when the defrost opening / closing door 7 is closed. The hot air 45b and the cold air 46b are not generated when the defrost opening / closing door 7 is opened and the vent opening / closing door 8 and the foot opening / closing door 9 are closed.

  In the configuration of this embodiment, as shown in FIGS. 2A and 3, when the defrost door 7 is in the closed position indicated by the solid line, the defrost door 7 is at the upper end of the baffle plate 10, That is, it contacts the opening 33 on the upper end side of each cylindrical body 25 and closes these openings 33. Accordingly, when the defrost opening / closing door 7 is closed, that is, in the vent mode or the bi-level (vent / foot) mode, the cylindrical body 25 does not function as a hot air passage. Proceed in the direction of. For this reason, when the defrost opening / closing door 7 is closed, the warm air is not guided to the upper part of the unit case 2 through the inside of the cylindrical body 25, so that the bias of the warm air to the upper part of the ventilation space 49 as in the past is reduced. In the bi-level mode, sufficient warm air is sent from the foot opening 17.

  As shown in FIGS. 4 and 5, the vehicle air conditioner according to the present embodiment is different from the first embodiment in the structure of the baffle plate 50 and the defrost opening / closing door 54. In the baffle plate 50 according to this embodiment, a plurality of groove-like bodies 51 are fixed by support members 26, 27, 28, and 29. Unlike the cylindrical body 25, the groove-like body 51 has an opening surface 57 having an open shape on the surface on the ventilation space 49 side. In the defrost opening / closing door 54 according to the present embodiment, a piece 55 is erected on the surface facing the baffle plate 50.

  With the above configuration, when the defrost opening / closing door 54 is in the closed position indicated by the solid line, the lower surface of the defrost opening / closing door 54 abuts the opening 59 at the upper end of the groove 51 and the piece 55 is the opening of the groove 51. The vicinity of the upper end of the surface 57 will be covered. As a result, when the defrost opening / closing door 54 is closed, that is, in the vent mode or the bi-level mode, the hot air does not escape upward from the upper end of the groove 51, so that the defrost is the same as in the first embodiment. When the open / close door 7 is closed, it is reduced that the warm air is biased to the upper part of the ventilation space 49, and sufficient warm air can be sent from the foot opening 17 even in the bi-level mode.

It is a figure which shows the structure of the vehicle air conditioner which concerns on Example 1 of this invention. (A) And (b) is a figure which shows the structure of the baffle plate and defrost opening / closing door which concern on Example 1. FIG. In the vehicle air conditioner which concerns on Example 1, it is a figure which shows the relationship between a baffle plate and a defrost opening / closing door, and how to flow hot air and cold air. It is a figure which shows the structure of the baffle plate and defrost opening / closing door of the vehicle air conditioner which concerns on Example 2. FIG. In the vehicle air conditioner which concerns on Example 2, it is a figure which shows the relationship between a baffle plate and a defrost opening / closing door, and how to flow warm air. It is a figure which shows the structure of the conventional vehicle air conditioner.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 2 Air conditioning unit 3 Evaporator 4 Heater core 6 Hot air / cold air switching door 7, 54 Defrost opening / closing door 8 Vent opening / closing door 9 Foot opening door 10, 50 Baffle plate 15 Defrost opening 16 Vent opening 17 Foot opening 20 Hot air passage 21 Cold air passage 25 Cylindrical body 26, 27, 28, 29 Support member 31 Gap 32 (Hot air passage side) Opening portion 33 (Defrost opening side) Opening portion 45a, 45b Hot air 46a, 46b Cold air 49 Ventilation space 51 Grooved member 55 One part

Claims (5)

A vehicle air conditioner comprising a baffle plate for rectifying hot air and cold air at a junction of hot air and cold air in a unit case,
The baffle plate is
A hot air guide path that communicates with the hot air passage in the unit case and guides the hot air from the hot air passage to a space on the side where the defrost opening in the unit case is formed;
Cool air that communicates with the cool air passage in the unit case, guides cool air from the cool air passage to the space on the side of the unit case where the vent opening and the foot opening are formed, and communicates with the warm air passage Taxiway,
Comprising
When the defrost opening / closing door that opens and closes the defrost opening is in the closed position, at least a part of the hot air guide path of the baffle plate is formed by a part of the defrost opening / closing door or a member integrated with the defrost opening / closing door. A vehicle air conditioner characterized by having a closed structure.   The warm air guide path is composed of a plurality of cylindrical bodies whose surfaces on the warm air passage side and the surface on the defrost opening side are open, and the cold wind guide path is composed of gaps between the cylindrical bodies. The vehicle air conditioner according to claim 1, wherein   3. The vehicle air conditioner according to claim 2, wherein when the defrost opening / closing door is in the closed position, the defrost opening / closing door contacts the opening on the defrost opening side of the warm air guide path.   The hot air guiding path is composed of a plurality of groove-like bodies having a surface on the hot air passage side, a surface on the defrost opening side, and a surface on the vent opening and foot opening side, and the cold air guiding path The vehicle air conditioner according to claim 1, comprising a gap between the groove-like bodies. When the defrost opening / closing door is in the closed position, the defrost opening / closing door contacts the opening on the defrost opening side of the warm air guide path, and a piece erected on the defrost opening / closing door has the warm air The vehicle air conditioner according to claim 4, wherein at least a part of the vent opening and the foot opening side surface of the guide path is covered.

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