JP4449031B2 - Air conditioning unit temperature control unit - Google Patents

Description

This invention relates to the structure of the temperature control unit part of the air-conditioning unit using the baffle plate for air-conditioning arrange | positioned at the confluence | merging site | part of two ventilation paths.

  In our company, in order to prevent the cool differential phenomenon, the heating heat exchanger is located in front of the cooling heat exchanger in the vehicle traveling direction, and the hot air passage through which the air passing through the heating heat exchanger flows is used for heating. It is located in the front of the vehicle traveling direction with respect to the cold air passage through which the air bypassing the heat exchanger flows, and the differential blowing opening and the foot blowing opening are located in front of the vent blowing opening in the vehicle traveling direction. An air conditioner unit for a vehicle air conditioner has been developed (see, for example, Patent Document 1).

Further, in the semi-integrated air conditioning unit for a vehicle including the blower unit and the temperature control unit, the cooling heat exchanger is located on the front side in the vehicle traveling direction, and the heating heat exchanger is located on the rear side in the vehicle traveling direction. Although it is located on the side, a configuration in which a temperature control guide means constituted by a baffle plate or the like is provided at the confluence portion of the cold air passage and the hot air passage has already been developed (for example, patent document) 2).
JP 2000-272329 A JP 2002-274149 A

  However, the air conditioner unit of the vehicle air conditioner described in Patent Document 1 is shown in a state where the heat exchanger for heating is arranged upright in the schematic diagrams of FIGS. 1 and 3. With the demand for downsizing of the air conditioning unit, the heating heat exchanger is disposed, for example, tilted forward in the vehicle traveling direction, so that the hot air that flows through the heating heat exchanger substantially flows. It is assumed that the distance between the end of the passage, the differential outlet, and the vent outlet is further away. For this reason, there is a concern that the hot air is not sufficiently supplied to the upstream side of the vent blowing opening, for example, pushed by the cold air from the cold air passage.

  In this regard, similarly to Patent Document 2, it is conceivable that hot air is appropriately sent to the upstream side of the vent blowing opening by disposing a baffle plate at a confluence portion between the cold air passage and the hot air passage.

  However, even when the same air conditioning unit is installed, the layout of the air conditioning duct and the opening position of the air outlet are slightly different due to the difference in the vehicle type, but it is considered that the temperature of the air can be changed even by such a slight difference. . Also, depending on the export destination, it may be desired to increase the amount of air blown out from the domestic specifications due to the usage environment. On the other hand, none of the conventional air conditioning units meets such a demand while sharing the most of the configurations of the air conditioning units.

Accordingly, the present invention is an air conditioning unit in which a heat exchanger for heating is disposed in front of the vehicle traveling direction and a cooling heat exchanger is disposed in the rear of the vehicle traveling direction, and the heating heat exchanger and the like are actually mounted on the vehicle. Air conditioning using a baffle plate for air conditioning that makes it possible to appropriately control the temperature of vent air and foot air even if there are differences due to vehicle type and specifications with simple adjustment. The purpose is to provide a unit.

The temperature control unit portion of the air conditioning unit according to the present invention includes a cooling heat exchanger and a heating heat exchanger, and the cooling heat exchanger is behind the heating heat exchanger in a vehicle traveling direction. Arranged in the unit case, the cool air passage through which the air bypassing the heating heat exchanger flows, the hot air passage through which the air that has passed through the heating heat exchanger flows, the vent blowing opening, and the differential blowing An opening and an opening for foot blowing are formed in the unit case, and one end is connected to the hot air passage, and the other end is connected to the vent. A baffle plate opened on the upstream side of the blowout opening is disposed, and the baffle plate has a passage portion that opens at both ends and allows the hot air to be guided to the vent blowout opening portion, and between the passage portions. Placed in the cold air before It has a blow-off portion that can be guided in a direction intersecting with the warm air and that also opens in the same direction as both opening ends of the passage portion, and can also guide the warm air to the vent blowing opening. Further, a hot air suppressing portion is constructed between the passage portions that are on the upper side of the hot air in the blow-through portion ( claim 1 ).

  Therefore, according to the present invention, the warm air that tries to flow toward the vent blowing opening through the blow-off portion disposed between the passage portions of the baffle plate is provided with the warm air suppressing portion. Since the passage area is reduced at the entrance portion of the blow-through portion, the passage resistance of the blow-through portion is increased, and the amount of hot air to the foot blow-off opening portion is reduced. Since the hot air suppressing part is arranged substantially parallel to the cold air passage, the height resistance of the hot air suppressing part is not increased, thereby increasing the passage resistance of the cold air passage.

  Accordingly, by changing the height of the hot air suppressing portion of the baffle plate, the amount of hot air sent to the vent blowing opening and the amount of hot air sent to the foot blowing opening can be increased or decreased inversely. . Therefore, the position of the air outlet, the layout of the air-conditioning duct, the required amount of air to be blown, etc. may differ between the export specification and the domestic specification for each vehicle type or the same vehicle type. It is possible to adjust the temperature and the air volume of the vent blown air and the foot blown air so as to meet the demands of the user only by changing the height of the hot air suppression unit.

  Embodiments of the present invention will be described below with reference to the drawings.

  In FIG.1 and FIG.2, an example of embodiment of the temperature control unit part 1 is shown. This temperature control unit unit 1 is connected to a blower unit unit (not shown) having at least an inside / outside air introduction port, an inside / outside air switching door, and a blower, so that it is a semi-integrated type mounted on a center console unit of a vehicle. It constitutes a vertical air conditioning unit.

  The temperature control unit 1 is configured to heat a cooling heat exchanger 3 such as an evaporator that cools the air sent from the blower unit, and a heater core that reheats the air cooled by the cooling heat exchanger 3. Heat exchanger 4 and an air mix door that is arranged between cooling heat exchanger 3 and heating heat exchanger 4 and adjusts the ratio of air sent to heating heat exchanger 4 and bypassed air 5 in the unit case 6. Among them, the heat exchanger 4 for heating is arranged with the head tilted forward in the vehicle traveling direction in this embodiment because of a request for downsizing the temperature control unit 1 or the like.

  Further, the temperature control unit 1 passes through the unit case 6 through the air reheated by the heating heat exchanger on the front side in the vehicle traveling direction, which is the downstream side of the heating heat exchanger 4. The hot air passage 7 is formed, and the cold air passage 8 is formed on the downstream side of the cooling heat exchanger 3 and on the side substantially upward in the drawing with respect to the heating heat exchanger 4 and the air mix door 5. ing.

  Then, on the downstream side of the portion where the hot air passage 7 and the cold air passage 8 of the temperature control unit 1 merge, a center vent blowing opening 10, a differential blowing opening 11, and a foot blowing opening 12 are provided. The unit case 6 is appropriately opened. Further, as shown in FIG. 2, side vent blowing openings 13, 13 are appropriately opened in the unit case 6 so as to be on both sides of the vent blowing opening 10 along the vehicle width direction.

  These blowout openings 10, 11, 12, and 13 communicate with a blowout opening that opens into the vehicle compartment via a duct (not shown). Among these, in the center vent blowing opening 10, the side vent blowing opening 13, and the differential blowing opening 11, the blowing mode switching doors 14, 15, and 16 open and close the openings 10, 13, and 11, respectively. It is arranged to be rotatable. Furthermore, in this embodiment, an air guide 17 for guiding air from the downstream side of the heat exchanger 4 for heating to the foot blowing opening 12 is formed, and on the flow path between the air guide 16 and the unit case 6. The blowing mode switching door 18 is rotatably arranged to open and close the foot blowing opening 12.

  The temperature control unit 1 is formed with an opening (not shown) for connecting to the blower unit at the rearmost position of the unit case 6 in the vehicle traveling direction, and accordingly, the cooling heat exchanger 3 is connected. Is arranged on the rear side in the vehicle traveling direction with respect to the heat exchanger 4 for heating. However, even if the vent blowing opening 10 and the differential blowing opening 11 are shifted to the front side in the vehicle traveling direction, the top of the cooling heat exchanger 3 is directly below the vent blowing openings 10 and 13. Further, it can be shifted and positioned rearward in the vehicle traveling direction. For this reason, since the curve of the flow of the air that has passed through the cooling heat exchanger 3 toward the vent blowing openings 10 and 13 can be made gentle, the air resistance can be relatively reduced. Moreover, compared with the case where the heat exchanger 3 for cooling is arrange | positioned in the vehicle advancing direction front side according to the conventional arrangement | positioning method, the opening area of the opening part 11 for differential blowing can also be ensured sufficiently.

  By the way, in this invention, as mainly shown by FIG.1 and FIG.2, the baffle plate 20 is provided in the site | part where the cool air path 8 and the warm air path 7 merge. As shown in FIGS. 3 and 5, the baffle plate 20 is configured by arranging the passage portions 21 and the blow-off portions 25 alternately in parallel. The baffle plate 20 is a separate member from the unit case 6 and the like of the temperature control unit 1, and is mounted in a state where the unit case 6 is divided along the width direction of the vehicle as shown in FIG. The

  Of the baffle plate 20, the passage portion 21 has one end connected to the hot air passage 7 and the other end opened to the vent blowing openings 10 and 13 in the vicinity of the differential blowing opening 11 and the cold air passage 8 side. It has a bottom surface 22 that draws an arc that gently swells. Further, wall portions 23, 23 are erected from both sides of the bottom surface 22 of the passage portion 21. Accordingly, the passage portion 21 is also opened forward in the vehicle traveling direction and has a substantially U-shaped cross section. The warm air heated by the heating heat exchanger 12 is indicated by an arrow (i) in FIG. As shown in the figure, since the warm air passage 7 is sent through the passage portion 21 of the baffle plate 20 to the vicinity of the vent blowing openings 10 and 13 and the differential blowing opening 11, the head of the heating heat exchanger 12 is shown. Even if the vehicle is tilted forward in the vehicle traveling direction, the required amount of warm air is reliably supplied to the vent blowing openings 10 and 13 and the differential blowing opening 11 so that the cool differential phenomenon and the cool side vent phenomenon occur. It can be prevented from occurring.

  On the other hand, the blow-off portion 25 shares the wall portions 23 and 23 of the passage portion 21, but does not have a bottom surface like the passage portion 21. It opens to the opening part 11 and the foot blowing opening part 12 side. As a result, the cold air bypassing the heating heat exchanger 12 passes through the blow-off portion 25 of the baffle plate 20 from the cold air passage 8 as shown by the arrow (ii) in FIG. It is sent to the vicinity of the blowout opening 12. Further, one of the blow-off portions 25 is opened in the vicinity of the vent blowing openings 10 and 13 and the other is connected to the warm air passage 7. Is provided with a hot air suppression unit 26. The hot air suppressing portion 26 also serves as a reinforcement for the baffle plate 20 in the same manner as the reinforcing portion 27 provided at the opposite end of the inlet portion 30.

  The hot air suppressing part 26 is constructed between the wall parts 23 and 23 so as to stand up from the same side as the bottom surface 22 of the passage part 21. By having this hot air suppression part 26, as shown in FIG. 5, the inlet part 30 on the upstream side of the hot air of the blow-off part 25 becomes narrower (or disappears), and this blow-off part 25 is connected to the blow-off part 25 from The hot air that was able to enter, as shown by the arrow (iii) in FIG. 5, is largely changed in the same direction as the cold air by being pushed by the flow of the cold air shown by the arrow (ii), It is sent to the vicinity of the differential blowing opening 11 and the foot blowing opening 12. The height of the hot air suppression unit 26 is not uniform, and the duct connected to the arrangement of the inclination angle of the heat exchanger 4 for heating in the temperature control unit 1 and the blowing openings 10, 11, 12, 13 is not provided. The dimensions are determined in consideration of the layout to be routed, the position of each outlet opening in the vehicle interior, the desired amount of blown air, and the like.

  That is, in the bi-level mode of the embodiment of the present application, as shown in FIG. 6A, when the height L1 of the hot air suppressing portion 26 is approximately the same as the wall portion 23, the dimension is 30 mm. Since the warm air suppression unit 26 closes the inlet portion 30 of the blow-off portion 25, the warm air does not pass through the inlet portion 30 of the blow-through portion 25 and travel toward the foot blowing opening 12. When the amount of hot air supplied to the blowout opening 12 is relatively small and the opening degree of the air mix door is between 20% and 100%, as shown in FIG. A reverse phenomenon occurs in which the temperature is higher than the average temperature of the foot blowing air.

  Further, in the bi-level mode of the embodiment of the present application, as shown in FIG. 7A, when the height L2 of the hot air suppressing part 26 is set to a dimension of 20 mm, the hot air is blown through the air blowing part 25. The inlet portion 30 on the upstream side of the warm air is opened, and the amount of hot air supplied to the foot blowing opening 12 is larger than that in the case of FIG. It cannot be said that the amount of hot air supplied to the opening 12 is sufficient. For this reason, in the case of the embodiment of the present application, as shown in FIG. 7B, the difference between the temperature of the vent blown air and the temperature of the foot blown air needs to be 15 ° C. or higher. A phenomenon occurs in which the temperature difference between the temperatures is less than 15 ° C.

  On the other hand, in the bi-level mode of the embodiment of the present application, as shown in FIG. 8A, when the height L3 of the hot air suppression unit 26 is set to a dimension of 10 mm, the hot air blows through. Since the inlet portion 30 on the upstream side of the hot air of the portion 25 is further opened and the passage resistance of the inlet portion 30 is further reduced, the amount of hot air supplied to the foot blowing opening 12 is further increased compared to FIG. . For this reason, in the case of the embodiment of the present application, as shown in FIG. 8B, an appropriate temperature difference of 15 ° C. or more can be obtained for the average temperature of the vent blown air and the average temperature of the foot blown air. . However, in the embodiment of the present application, since the appropriate height of the hot air suppression unit 26 is 10 mm, the baffle plate 20 in which the hot air suppression unit 26 having this height is formed is mounted.

  However, the appropriate height of the hot air suppression unit 26 is 10 mm, as described above, is related to the embodiment of the present application. That is, depending on various conditions such as the angle of inclination of the heat exchanger 4 for heating and the width of the hot air passage 7, a height of 20 mm provides an appropriate temperature difference between the temperature of the vent air and the temperature of the foot air. It can happen. Further, when it is desired to relatively increase the amount of foot blowing air in the export specification, the warm air suppression unit 26 may be lowered to a height of 5 mm.

FIG. 1 is a cross-sectional view showing the overall configuration of the temperature control unit according to the present invention. FIG. 2 is an external configuration diagram of the temperature control unit according to the present invention. FIG. 3A is a perspective view showing the configuration of the baffle plate, and FIG. 3B is a perspective view showing the configuration of the baffle plate in FIG. 3A as viewed from the opposite side. FIG. 4 is an explanatory view showing a state in which the unit case of the temperature control unit part is divided and the baffle plate is mounted. FIG. 5 is an explanatory diagram showing the flow of hot air and cold air passing through the passage portion and the blow-through portion of the baffle plate. FIG. 6A is an explanatory diagram showing the flow of hot air when the height of the hot air suppressing portion of the baffle plate is 30 mm in the embodiment of the present application, and FIG. 6B is bilevel at this height. It is a characteristic diagram which showed comparison with the vent blowing air temperature at the time of mode, and a foot blowing air temperature. FIG. 7A is an explanatory diagram showing the flow of hot air when the height of the hot air suppressing portion of the baffle plate is 20 mm in the embodiment of the present application, and FIG. 7B is bilevel at this height. It is a characteristic diagram which showed comparison with the vent blowing air temperature at the time of mode, and a foot blowing air temperature. FIG. 8A is an explanatory diagram showing the flow of hot air when the height of the hot air suppressing portion of the baffle plate is 20 mm in the embodiment of the present application, and FIG. 8B is bilevel at this height. It is a characteristic diagram which showed comparison with the vent blowing air temperature at the time of mode, and a foot blowing air temperature.

DESCRIPTION OF SYMBOLS 1 Temperature control unit part 3 Heat exchanger for cooling 4 Heat exchanger for heating 6 Unit case 7 Warm air passage 8 Cold air passage 10 Vent blowing opening 11 Differential blowing opening 12 Foot blowing opening 20 Baffle plate 21 Passage Part 25 Blow-through part 26 Hot air suppression part

Claims (1)

A cooling heat exchanger and a heating heat exchanger are arranged in the unit case so that the cooling heat exchanger is behind the heating heat exchanger in the vehicle traveling direction,
A cold air passage through which the air bypassing the heating heat exchanger flows, a hot air passage through which the air that has passed through the heating heat exchanger flows, a vent blowing opening, a differential blowing opening, and a foot blowing opening And forming the unit in the unit case,
A baffle plate having one end connected to the hot air passage and the other end opened to the upstream side of the vent blowing opening is disposed at the confluence of the cold air passage and the hot air passage,
The baffle plate is opened between both ends to allow the hot air to be guided to the vent blowing opening, and is arranged between the passages to guide the cold air in a direction intersecting the hot air. And a blowout part that opens in the same direction as both opening ends of the passage part, and that can also guide the hot air to the vent blowout opening part. A temperature control unit part of an air conditioning unit for vehicles, wherein a warm air suppression part is installed between the passage parts on the windward side.

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