Vehicle air conditioning device

Abstract

In a case where the air mixing damper is in the vicinity of the full heat position, both a function of suppressing the inflow amount of the cool air from the cool air main flow passage to the air mixing chamber and a function of actively guiding the cool air from the cool air main flow passage to the rear blowout port via the air mixing chamber are taken into account. In a case where the cool air amount adjusting guide 20 and the cool air bypass guide 30 are provided, a portion of the cool air amount adjusting guide 20 is cut off, the cool air guide inlet 31 of the cool air bypass guide 30 faces the cutout 21, the cool air amount adjusting guide 20 is formed to extend from the air conditioning case 2 to the cool air main flow passage 9, the inflow amount of the cool air to the air mixing chamber 11 when the air mixing damper 10 is in the vicinity of the full heat position is limited, and the cool air bypass guide 30 guides the cool air that has passed through the cool air main flow passage 9 to the rear blowout port 16 with the mixing of the warm air that has passed through the warm air main flow passage 8 reduced.

Description

Technical Field

[0001] This invention relates to a vehicle air conditioning device that ensures the linearity of the harmonic air temperature when the air mixing damper is displaced from the full-heat position and prevents cold difference phenomena. Background Technology

[0002] A vehicle air conditioning unit includes: an air conditioning housing having an airflow path formed inside; a cooling heat exchanger disposed inside the air conditioning housing for cooling the air conditioning air introduced into the airflow path; a heating heat exchanger for heating the air conditioning air; a warm air main flow path for guiding the air conditioning air downstream as warm air through the heating heat exchanger; a cold air main flow path for guiding the air conditioning air downstream as cold air bypassing the heating heat exchanger; an air mixing damper for adjusting the ratio of warm air flowing in the warm air main flow path to cold air flowing in the cold air main flow path; and an air mixing chamber for mixing the cold air passing through the cold air main flow path with the warm air passing through the warm air main flow path to form blended air.

[0003] Furthermore, the air mixing chamber is connected to a defrost outlet for blowing air from the air conditioning system onto a windshield (not shown), a ventilation outlet for blowing air onto the upper body of the occupant, and a foot outlet for blowing air onto the occupant's feet. Additionally, the air conditioning housing is equipped with a mode damper for adjusting the supply amount of air to the defrost outlet, ventilation outlet, and foot outlet, and for adjusting the blowing pattern.

[0004] The air mixing damper can move between a fully hot position where all the air conditioning air passes through the warm air mainstream passage and a fully cold position where all the air conditioning air passes through the cold air mainstream passage, even when there is no cold air flowing in the cold air mainstream passage. Especially when there is a slight opening, such as a slight displacement from the fully hot position to the fully cold position, air conditioning air that has passed through the cooling heat exchanger will suddenly flow into the lower pressure gap (the gap between the air mixing damper and the sealing part that seals when the air mixing damper is fully hot). An airflow greater than the airflow volume designed for the slight opening of the air mixing damper will flow out from the cold air mainstream passage to the air mixing chamber.

[0005] Therefore, the linearity of the temperature of the blended air in the air mixing chamber (the ratio of the rate of temperature decrease of the blended air in the air mixing chamber to the amount of movement of the air mixing damper from the full-heat position) is affected. In particular, for the defrost outlet connected to the part of the air mixing chamber near the cold air mainstream passage, there is a concern that cold air from the cold air mainstream passage may not be fully mixed with warm air in the air mixing chamber before reaching the defrost outlet, resulting in a large amount of cold air being sent out from the defrost outlet, which may cause adverse conditions such as windshield fogging.

[0006] Therefore, in order to reduce the amount of cold air supplied from the main cold air passage to the air mixing chamber when the opening is so small and to adjust the linearity of the blended air temperature, it is desirable to install a cold air volume regulating guide that limits the amount of cold air flowing into the air mixing chamber when the air mixing damper is near the full heat position.

[0007] For example, in the following Patent Document 1, an air mixing damper is disclosed, which is composed of a single-arm damper with the rotating shaft integrally disposed at the end of the flat damper body. An arc-shaped guide plate is arranged at a predetermined interval from the full-heat position of the air mixing damper to the rotation trajectory of the front end of the air mixing damper within a predetermined rotation angle range. This guide plate can be considered to function as a cold air volume regulating guide that limits the inflow of cold air into the air mixing chamber when the air mixing damper is near the full-heat position.

[0008] Therefore, by setting such a cold air volume regulating guide, it is possible to suppress the inflow of cold air into the air mixing chamber when the air mixing damper is near the full heat position, thereby regulating the linearity of the blended air temperature and avoiding cold difference phenomena.

[0009] On the other hand, in order to obtain the desired temperature performance, it is required to give the mixed air blown out from each outlet a temperature difference, and to seek a structure that guides the cold air flowing in the main cold air path to the ventilation outlet and other structures so as to avoid mixing with the warm air in the air mixing chamber as much as possible.

[0010] Therefore, in the following Patent Document 2, a structure is proposed that provides a general guide (fixed guide with guide plate) for cold air in the air mixing chamber to prevent cold air flowing in the main cold air passage from mixing with warm air and to guide it to the ventilation outlet (cold air outlet).

[0011] With this structure, the necessary amount of cool air can be actively supplied to the ventilation outlet without mixing with warm air, thus achieving high temperature regulation performance.

[0012] Existing technical documents

[0013] Patent documents

[0014] Patent Document 1: Japanese Patent Application Publication No. 10-114209

[0015] Patent Document 2: Japanese Patent Application Publication No. 2009-143330 Summary of the Invention

[0016] The technical problem that the invention aims to solve

[0017] However, when the air mixing damper is at a small opening near the full heat position, the structure that suppresses the inflow of cold air from the main cold air passage into the air mixing chamber and the structure that actively guides the cold air from the main cold air passage to the ventilation outlet require opposite flow of cold air. Therefore, how to balance the flow of these two opposite cold airs becomes a problem.

[0018] This problem arises not only when the air mixing damper is composed of a plate damper, but also when it is composed of a sliding damper or a rotary damper.

[0019] The present invention was made in view of the above circumstances, and its main technical problem is to provide a vehicle air conditioning device that can simultaneously suppress the inflow of cold air from the main cold air passage into the air mixing chamber when the air mixing damper is near the full heat position, and actively guide the cold air from the main cold air passage to the rear outlet so as not to mix with the warm air as much as possible.

[0020] Technical solutions for solving technical problems

[0021] To solve the above-mentioned technical problems, the vehicle air conditioning device of the present invention includes:

[0022] The air conditioner casing has an internal airflow path.

[0023] A heat exchanger for heating is disposed inside the air conditioner housing to heat the air conditioning air introduced into the air flow path;

[0024] The main warm air path allows the air conditioning air to pass through the heating heat exchanger and be guided downstream as warm air.

[0025] The main cold air path allows the air conditioning air to bypass the heating heat exchanger and be guided downstream as cold air.

[0026] An air mixing damper adjusts the ratio of warm air flowing in the warm air mainstream passage to cold air flowing in the cold air mainstream passage.

[0027] An air mixing chamber that mixes cold air passing through the main cold air flow path with warm air passing through the main warm air flow path to create blended air;

[0028] The front air outlet is connected to the part of the air mixing chamber near the main cold air passage;

[0029] The rear air outlet is connected to the side of the air mixing chamber opposite to the main cold air flow path.

[0030] A cold air volume regulating guide is formed to extend from the air conditioner housing to the cold air mainstream passage, thereby limiting the inflow of cold air into the air mixing chamber when the air mixing damper is in the full heat position;

[0031] The vehicle air conditioning unit is characterized in that...

[0032] It is equipped with a universal guide for cold air, which introduces cold air flowing in the main cold air path through the cold air inlet, reduces mixing with warm air flowing in the main warm air path, and guides it to the rear outlet.

[0033] The cold air volume regulating guide has a cutout that cuts off a portion of the guide.

[0034] The cold air inlet faces the cut.

[0035] When a cold air volume regulating guide and a cold air bypass universal guide are installed, the cold air inlet of the cold air bypass universal guide faces (opens to) the cutout of the cold air volume regulating guide. Therefore, it is possible to achieve a structure that combines the opposite effects of a cold air volume regulating guide that restricts the inflow of cold air into the air mixing chamber and a cold air bypass universal guide that actively guides cold air to the rear outlet. This ensures the linearity of the harmonized air temperature when the air mixing damper is slightly displaced from the full-heat position (at a slight opening) and reliably prevents cold difference phenomena, thus achieving high temperature control performance.

[0036] Here, a universal guide for the cold air can be installed on a baffle set in the air mixing chamber.

[0037] That is, in the case where the air mixing chamber is equipped with a baffle that cuts off the mixing of warm air from the main warm air path with cold air and directs it to the forward outlet, and cuts off the mixing of cold air from the main cold air path with warm air and directs it to the rear outlet, the baffle can be used instead of the general guide for cold air.

[0038] In contrast, in a vehicle air conditioning system where the airflow path is divided by a partition wall, a universal guide for the cold air can be placed on both sides of the partition wall.

[0039] Furthermore, if a universal guide for cold air is provided along the side wall of the air conditioner housing, the universal guide for cold air can be provided on the side wall of the air conditioner housing.

[0040] Here, the universal guide next to the cold air can direct the cold air to multiple rear outlets.

[0041] Furthermore, the universal guide for the cold air can be formed in a cylindrical shape or it can be composed of guide plates arranged roughly parallel to each other vertically.

[0042] The structure described above can be applied to various air conditioning units. It can be used in vehicle air conditioning units where the front air outlet connected to the part of the air mixing chamber near the main cold air flow passage is at least one of a defrost air outlet and a side ventilation air outlet, and the rear air outlet connected to the side of the air mixing chamber opposite to the main cold air flow passage is at least one of a central ventilation air outlet and a foot air outlet. It can also be used in vehicle air conditioning units where the front air outlet is a defrost air outlet and the rear air outlet is at least one of a ventilation air outlet and a foot air outlet.

[0043] The effects of the invention

[0044] As described above, according to the present invention, in a vehicle air conditioning system having a cold air volume regulating guide that extends from the air conditioning housing to the cold air mainstream passage and restricts the inflow of cold air into the air mixing chamber when the air mixing damper is near the full-heat position, and a cold air-side universal guide that reduces the mixing of cold air passing through the cold air mainstream passage with warm air from the warm air mainstream passage and guides it to the rearward outlet, a portion of the cold air volume regulating guide is cut off, and the cold air inlet of the cold air-side universal guide is opened in the cut. Therefore, when the air mixing damper is near the full-heat position, it is possible to simultaneously suppress the inflow of cold air from the cold air mainstream passage into the air mixing chamber and actively guide the cold air from the cold air mainstream passage to the rearward outlet via the air mixing chamber. This ensures the linearity of the harmonic air temperature when the air mixing damper is slightly displaced from the full-heat position (at a slight opening), and reliably prevents cold air difference phenomena, thereby achieving high temperature control performance. Attached Figure Description

[0045] Figure 1 The figures show embodiments of the vehicle air conditioning device of the present invention, (a) is a cross-sectional view showing an example of the overall structure, and (b) is a perspective view viewed from the rear oblique angle of the air mixing damper, the cold air volume adjustment guide and the cold air bypass general guide.

[0046] Figure 2 This illustrates an example of placing a universal air guide near the airflow path roughly in the center. Figure 1 The diagram shows the interior of a vehicle's air conditioning unit, viewed from between the cooling heat exchanger and the air mixing damper. It indicates that the air mixing damper has been moved to a position lower than the cold air volume regulating guide.

[0047] Figure 3The figures illustrate other states of the cut in the cold air volume regulating guide and the opening of the cold air inlet of the cold air side universal guide. (a) is an example of a case where the end of the cold air side universal guide with the cold air inlet is smaller than the cut in the cold air volume regulating guide. (b) is an example of a case where the end of the cold air side universal guide with the cold air inlet is larger than the cut in the cold air volume regulating guide.

[0048] Figure 4 The diagram shows an example of placing a universal guide for cold air flow on the left and right sides of the airflow path. (a) is a diagram of the air mixing damper side viewed from between the cooling heat exchanger and the air mixing damper inside the vehicle air conditioning unit. It is a diagram showing the air mixing damper moved to a position lower than the cold air volume regulating guide. (b) is a perspective view of the air mixing damper, cold air volume regulating guide and universal guide for cold air flow in (a) viewed from the rear.

[0049] Figure 5 The diagram shows another example of placing the universal guide for cold air flow on the left and right sides of the airflow path. (a) is a diagram of the air mixing damper side viewed from inside the vehicle air conditioning unit between the cooling heat exchanger and the air mixing damper. It shows the state in which the air mixing damper is moved to a position lower than the cold air volume regulating guide. (b) is a perspective view of the air mixing damper, cold air volume regulating guide and universal guide for cold air flow in (a) viewed from the rear.

[0050] Figure 6 This is an example of sliding dampers arranged side by side along the airflow path, with corresponding cold air volume adjustment guides and cold air bypass general guides. This is also an example of cold air volume adjustment guides and cold air bypass general guides arranged asymmetrically on the left and right sides.

[0051] Figure 7 This is a cross-sectional view showing another embodiment of the vehicle air conditioning device of the present invention, and it is a cross-sectional view showing an example where the device is divided into left and right sides by a partition wall at a location downstream of the evaporator.

[0052] Figure 8 This illustrates an example of placing universal guides for the cold air intake on the left and right sides of a partition wall. Figure 7 The diagram shows the interior of a vehicle's air conditioning unit, viewed from between the cooling heat exchanger and the air mixing damper. It indicates that the air mixing damper has been moved to a position lower than the cold air volume regulating guide.

[0053] Figure 9 It means in Figure 8The diagram shows a perspective view of a structure in which a partition wall is used to set up a universal guide for the cold air side. (a) is a diagram showing an example in which the universal guide for the cold air side is formed in a cylindrical shape on both sides of the partition wall. (b) is a diagram showing an example in which a universal guide for the cold air side is formed on both sides of the partition wall using guide plates arranged roughly parallel to each other vertically.

[0054] Figure 10 The diagram shows an example of a universal guide for cold air flow installed along the left and right side walls of the air conditioning unit. It is a view of the air mixing damper side inside the vehicle air conditioning unit, between the cooling heat exchanger and the air mixing damper, showing the state where the air mixing damper is moved to a position lower than the cold air volume regulating guide.

[0055] Figure 11 It means in Figure 10 The diagram shows a perspective view of a structure in which a universal guide for cold air is provided on the side wall of the air conditioner housing. (a) is a diagram showing an example in which the universal guide for cold air is formed in a cylindrical shape on the inner side of the side wall. (b) is a diagram showing an example in which a universal guide for cold air is formed on the inner side of the side wall using guide plates arranged roughly parallel to each other vertically. Detailed Implementation

[0056] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0057] exist Figure 1 The image shows a vehicle air conditioning unit 1 mounted near the center console of the vehicle. This vehicle air conditioning unit 1 is located on the side of the partition that divides the engine compartment and the passenger compartment, near the passenger compartment, and introduces external air (outdoor air) and / or internal air (indoor air) into the air conditioning housing 2 via a blower unit (not shown).

[0058] The air conditioning housing 2 forms a passage (air flow path 3) for air to flow toward the vehicle compartment. It is made of synthetic resin and has an air inlet space 5 on the upstream side (partition side) for air to be introduced through the air inlet 4.

[0059] An evaporator 6 constituting a cooling heat exchanger is disposed on the downstream side of the air inlet space 5 inside the air conditioner housing 2, and a heater core 7 constituting a heating heat exchanger is disposed on the downstream side of the evaporator 6.

[0060] The evaporator 6 forms part of the refrigeration cycle and is vertically installed in the air passage so that all the air conditioning air introduced from the air inlet 4 passes through it, cooling the passing air as needed. Furthermore, the heater core 7 is vertically installed in the lower part of the air conditioning housing 2, downstream of the evaporator 6.

[0061] A warm air mainstream passage 8 is provided downstream of the evaporator 6, which guides the air conditioning air through the heating heat exchanger 7 and serves as warm air to the downstream side, and a cold air mainstream passage 9 is provided, which guides the air conditioning air around the heating heat exchanger 7 and serves as cold air to the downstream side.

[0062] Furthermore, an air mixing damper 10 is provided on the downstream side of the evaporator 6 to adjust the ratio of warm air flowing in the warm air mainstream passage 8 to cold air flowing in the cold air mainstream passage 9, and an air mixing chamber 11 is provided above the heater core 7 on the downstream side of the air mixing damper 10 to mix the cold air passing through the cold air mainstream passage 9 with the warm air passing through the warm air mainstream passage 8 to form a mixed air.

[0063] In this example, the air mixing damper 10 is a sliding damper. Damper guides 12 extending downwards are provided on the inner surfaces of the left and right side walls of the air conditioning housing 2 to allow it to move up and down along the end face of the evaporator 6's ventilation outlet side. Specifically, a rack 13 is formed along the vertical direction on the upstream surface of the air mixing damper 10. A pinion 14 meshing with the rack 13 is provided on the upstream side of the air mixing damper 10. The pinion 14 is rotated by an actuator (not shown), thereby allowing the air mixing damper 10 to move up and down between a fully hot position (where the cold air main flow passage 9 is closed, and the warm air main flow passage 8 is fully open) and a fully cold position (where the warm air main flow passage 8 is closed, and the cold air main flow passage 9 is fully open).

[0064] A front outlet 15 is provided above the air mixing chamber 11 of the air conditioner housing 2, which is located above the main cold air passage 9, and is capable of supplying air conditioning air to the window glass or its vicinity. A rear outlet 16 is connected to the side of the air mixing chamber 11 of the air conditioner housing 2 opposite to the main cold air passage 9.

[0065] Here, the front air outlet 15 includes a defrost air outlet 151 that blows mixed air toward the windshield (not shown) and a side ventilation air outlet 152 that blows mixed air toward the vicinity of the side glass, and the rear air outlet 16 includes a central ventilation air outlet 161 that blows mixed air toward the upper body of the occupant and a foot air outlet 162 that blows mixed air toward the feet of the occupant.

[0066] It should be noted that the opening of the defrost outlet 151 is adjusted by the defrost damper 151a, the opening of the side ventilation outlet 152 is adjusted by the side ventilation damper 152a, the opening of the central ventilation outlet 161 is adjusted by the central ventilation damper 161a, and the opening of the foot outlet 162 is adjusted by the foot damper 162a.

[0067] In this vehicle air conditioning unit 1, a cold air volume regulating guide 20 extending from the air conditioning housing 2 is disposed in the cold air mainstream passage 9. In this example, the cold air volume regulating guide 20 is formed in the shape of a plate and is provided to extend from the upper wall of the air conditioning housing 2, approximately parallel to the movement trajectory of the air mixing damper 10, toward the cold air mainstream passage 9. The cold air volume regulating guide 20 is disposed at predetermined intervals relative to the movement trajectory of the air mixing damper 10 so as not to affect the up and down movement of the air mixing damper 10.

[0068] Such a cold air volume regulating guide 20 can be disposed on either the upstream side or the downstream side of the air mixing damper 10; in this example, it is disposed on the downstream side of the air mixing damper 10. Furthermore, in this example, the cold air volume regulating guide 20 is disposed over approximately the entire lateral width of the airflow path 3, and the lower edge of the cold air volume regulating guide is approximately parallel to the upper edge of the air mixing damper 10.

[0069] Therefore, the cold air volume regulating guide 20 has the function of limiting the inflow of cold air into the air mixing chamber 11 when the air mixing damper 10 is near the full-heat position. That is, when the air mixing damper 10 moves downward from the uppermost full-heat position, the inflow of cold air into the air mixing chamber 11 is limited before the upper edge of the air mixing damper 10 leaves the lower edge of the cold air volume regulating guide 20 (the upper edge of the air mixing damper 10 is below the lower edge of the cold air volume regulating guide 20). Then, when the upper edge of the air mixing damper 10 leaves the lower edge of the cold air volume regulating guide 20, the gap between the air mixing damper 10 and the cold air volume regulating guide 20 increases, and more cold air begins to flow into the air mixing chamber 11.

[0070] Downstream of such a cold air volume regulating guide 20, i.e., in the air mixing chamber 11, is a cold air side universal guide 30 that reduces the mixing of cold air flowing in the cold air mainstream passage 9 with warm air flowing in the warm air mainstream passage 8 and guides it to the rear outlets (central ventilation outlet 161, foot outlet 162).

[0071] The universal guide 30 for cooling air is fixed to the air conditioner housing 2 by a support member (not shown), or it is installed inside the air conditioner housing 2 using a fixing part (not shown) integrally formed with the universal guide 30 for cooling air. Figure 1(b) shows a baffle 33 designed to prevent mixing with warm air in order to guide cold air to the rear outlet. This cold air-side universal guide 30 is cylindrical, extending in a direction substantially perpendicular to the cold air volume adjustment guide 20. It has a cold air inlet 31 at one end opening towards the cold air volume adjustment guide 20, and a cold air outlet 32 ​​at the other end opening towards the rear outlet 16 (central ventilation outlet 161, foot outlet 162). In this example, the upper front surface of the cold air-side universal guide is not open to the front outlet 15 (defrost outlet 151, side ventilation outlet 152), while the upper rear surface and the other end are open to the rear outlet (central ventilation outlet 161 and foot outlet 162).

[0072] Moreover, in this example, such as Figure 2 As shown, a rectangular cutout 21 is provided in the approximate central part of the cold air volume adjustment guide 20, so that the cold air inlet 31 of the cold air side universal guide 30 opens (facing) the cutout 21.

[0073] Here, the cutout 21 of the cold air volume adjustment guide 20 is configured to divide the cold air volume adjustment guide 20 to the left and right.

[0074] Furthermore, the end of the cold air inlet 31 of the cold air general guide 30 can either be fitted into the cutout 21 of the cold air volume adjustment guide 20, or be close to or separated from the downstream side of the cutout 21 by a predetermined interval.

[0075] It should be noted that, in Figure 1 and Figure 2 In the illustrated scheme, the lateral width of the cutout 21 of the cold air volume regulating guide 20 is consistent with the lateral width of the end of the cold air-side universal guide 30 that forms the cold air inlet 31. Furthermore, the vertical width of the end of the cold air-side universal guide 30 that forms the cold air inlet 31 can be consistent with the extension amount of the cold air volume regulating guide 20 (the dimension extending downward from the upper surface of the air conditioner housing 2), or the end on the cold air inlet 31 side can be extended to a position lower than the lower edge of the cold air volume regulating guide 20 in order to obtain the necessary cold air volume for the rearward blowing outlet (the air volume to obtain the desired temperature regulation characteristics).

[0076] Therefore, according to the above structure, when the air mixing damper 10 is near the full-heat position (when the upper edge of the air mixing damper 10 is at the same position as the lower edge of the cold air volume regulating guide 20 or is above the lower edge), the flow of cold air into the air mixing chamber 11 is restricted by the cold air volume regulating guide 20. The cold air only flows into the air mixing chamber 11 through the narrow gap (prescribed gap) between the air mixing damper 10 and the cold air volume regulating guide 20. Therefore, the cold air will not flow into the air mixing chamber 11 all at once, and the amount of temperature change of the blended air relative to the amount of movement of the air mixing damper from the full-heat position can be adjusted (ensuring the linearity of the temperature change of the blended air).

[0077] Furthermore, before the upper edge of the air mixing damper 10 leaves the lower edge of the cold air volume regulating guide 20, the inflow of cold air into the air mixing chamber is restricted. Therefore, by opening the cold air side universal guide 30 into the cut 21 of the cold air volume regulating guide 20, the inflow pressure of cold air into the cold air side universal guide 30 upstream of the air mixing damper 10 is increased, and the cold air flows in a concentrated manner into the cold air side universal guide 30 and is guided to the rear outlet 16.

[0078] Then, when the upper edge of the air mixing damper 10 leaves the lower edge of the cold air volume regulating guide 20, the cold air on the upstream side of the air mixing damper 10 begins to flow more towards the air mixing chamber 11 from the gap between the air mixing damper 10 and the cold air volume regulating guide 20. However, the opening of the air mixing damper 10 is in a state of increasing to a certain extent from the full heat position, so the cold air volume can be a cold air volume that corresponds to the opening of the air mixing damper 10 even when flowing into the air mixing chamber 11, without affecting the linearity of the blended air temperature.

[0079] Furthermore, in this state, cold air continues to be supplied to the rear outlet via the cold air universal guide 30, so that the cold air ultimately guided to the air mixing chamber 11 will not become excessive and the cold air difference phenomenon can be avoided.

[0080] It should be noted that, in Figure 1 and Figure 2 In the illustrated scheme, the lateral width of the cut 21 of the cold air volume regulating guide 20 is consistent with the lateral width of the end of the cold air inlet 31 of the cold air bypass universal guide 30. However, it can also be as follows: Figure 3 As shown in (a), the lateral width of the end of the cold air inlet 31 is made smaller than the lateral width of the cutout 21 of the cold air volume regulating guide 20, and it can also be as shown in (a). Figure 3 (b) is formed as shown in the diagram, with a width greater than the lateral width of the cutout 21 of the cold air volume regulating guide 20.

[0081] From the perspective of adjusting the amount of movement of the air mixing damper 10 from the full-heat position and the amount of temperature change of the mixed air, it is preferable to make the lateral width of the end with the cold air inlet 31 smaller than the lateral width of the cut 21 of the cold air volume adjustment guide 20.

[0082] The above structure illustrates an example where a cutout 21 of the cold air volume regulating guide 20 is positioned approximately in the center of the left-right direction of the airflow path 3, and the cold air inlet 31 of the cold air bypass guide 30 opens into this cutout 21. However, it is also possible to... Figure 4 As shown in (a), cutouts 22 and 23 are provided at the left and right ends of the cold air volume adjustment guide 20, and the cold air inlets 311 and 312 of the cold air side universal guides 301 and 302 are opened at the cutouts 22 and 23 at the two ends respectively.

[0083] In this case, the universal guide 301, 302 near the cold air can both Figure 1 (b) The baffles shown are arranged on the left and right sides of the air mixing chamber 11, or as shown in the diagram. Figure 4 As shown in (b), it will be relative to Figure 1 (b) shows a baffle that eliminates the need for a side-mounted cold air bypass guide 301, 302, which is fixed to the side walls 2a, 2b of the air conditioner housing 2 to form a cold air bypass passage. It should be noted that each cold air outlet 321, 322 and... Figure 1 Similarly, it opens in a manner that faces rearward and blows out through the outlet 16.

[0084] Furthermore, it can also be like Figure 5 As shown, the guide plates 341, 342, 351, and 352, arranged vertically, are provided on the side walls 2a and 2b of the air conditioning housing 2, forming universal cold air guides 301 and 302 that are centrally open in the left-right direction of the airflow path 3. Here, the guide plates 341, 351, 342, and 352 can either fix other components to the side walls 2a and 2b, or they can be formed by ribs integrally formed with the side walls 2a and 2b.

[0085] The above structure illustrates an example of installing an air mixing damper in the airflow path 3. However, the same structure can also be formed, for example, by arranging the air mixing dampers 101 and 102 side by side along the left and right sides of the airflow path 3. Figure 6 As shown, when the air mixing dampers 101 and 102 are arranged side by side, cold air volume adjustment guides 201 and 202 and cold air bypass general guides 301 and 302 can be provided for each air mixing damper 101 and 102.

[0086] In such a structure, when the airflow is deflected on the right and left sides of the airflow path 3, the cold air volume adjustment guides 201, 202 and the cold air bypass general guides 301, 302 can be configured to be asymmetrical to match the deflection of the airflow.

[0087] Furthermore, the same applies to the embodiments up to the foregoing, except that the extension amount to the main cold air flow path 9 may not be constant, but may vary in the left and right directions.

[0088] exist Figure 7 , Figure 8 The image below shows another structural example of a vehicle air conditioning unit 1. In this example, the portion of the air conditioning housing 2 downstream of the evaporator 6 is divided into left and right airflow paths 3a and 3b by a partition wall 40. The left and right air mixing dampers 101 and 102 can be used to independently control the temperature.

[0089] In this example, above the main cold air flow passage 9 in the air mixing chambers 11a, 11b of each air flow path 3a, 3b, there is a front air outlet 15 consisting of a defrost outlet 153 that communicates with the right air flow path 3b and blows air conditioning air out to the windshield (not shown). On the side of the air mixing chambers 11a, 11b of the air conditioning housing 2 opposite to the main cold air flow passages 9a, 9b, there is a rear air outlet 16 consisting of left and right ventilation outlets 164, 165 that blow air conditioning air out to the upper body of the occupant and left and right foot outlets 166, 167 that blow air conditioning air out to the feet of the occupant.

[0090] The opening of the defrost outlet 153 is adjusted by the defrost damper 153a, the opening of the ventilation outlets 164 and 165 is adjusted by the ventilation dampers 164a and 165a, and the opening of the foot outlets 166 and 167 is adjusted by the foot dampers 166a and 167a.

[0091] In such a vehicle air conditioning unit, in order to have the same Figure 1 With the same function, warm air main channels 8a, 8b, cold air main channels 9a, 9b and air mixing chambers 11a, 11b are provided on each side of the partition wall 40 to mix the warm air passing through the warm air main channels 8a, 8b and the cold air passing through the cold air main channels 9a, 9b to form mixed air. Cold air volume adjustment guides 201, 202 and cold air side universal guides 301, 302 are provided on each side.

[0092] The cold air volume regulating guides 201 and 202 extend from the air conditioning housing 2 and are disposed in the cold air main flow passages 9a and 9b of the left and right air flow paths 3a and 3b separated by the partition wall 40. They have the function of limiting the amount of cold air flowing into the air mixing chambers 11a and 11b when the air mixing dampers 101 and 102 are near the full heat position.

[0093] These cold air volume regulating guides 201, 202 are formed, for example, in the shape of plates, and can be disposed on either the upstream side or the downstream side of the air mixing damper 10. In this example, they are disposed on the downstream side of the air mixing damper 10. Furthermore, in this example, each cold air volume regulating guide 201, 202 is disposed over approximately the entire lateral width of the airflow paths 3a, 3b between the partition wall 40 and the side walls 2a, 2b of the air conditioning housing 2, and extends approximately evenly from the air conditioning housing 2 (the lower edge of the cold air volume regulating guide 201, 202 is approximately parallel to the upper edge of the air mixing dampers 101, 102).

[0094] Furthermore, the universal guide components 301 and 302 near the cold air outlet can utilize... Figure 1 It can be set up with a baffle as shown in (b), but it can also be set up as shown in (b). Figure 8 As shown in (a), the partition wall 40 is used to set up cutouts 211, 212 between each cold air volume adjustment guide 201, 202 and the partition wall 40, and to make the cold air inlets 311, 312 face the cutouts 211, 212.

[0095] That is, it is possible to pass through both sides of the partition wall 40, such as Figure 9 As shown in (a), pipe forming components 331 and 332 with a U-shaped cross section are fixed to the open side of the partition wall 40, while cold air side universal guides 301 and 302 are formed in a cylindrical shape on both sides of the partition wall 40.

[0096] Furthermore, it can also be like Figure 9 As shown in (b), general-purpose cold air guides 301 and 302 with air mixing chamber lateral airflow paths 3a and 3b open are formed by providing guide plates 341, 351, 342, and 352 arranged approximately parallel vertically on both sides of the partition wall 40, extending from the partition wall 40. These guide plates 341, 351, 342, and 352 can be structures for fixing other components to the partition wall 40, or structures composed of ribs integrally formed with the partition wall 40.

[0097] The universal guides 301 and 302 for cooling air outlets 321 and 322 face the foot outlets 166 and 167. The upper side portion is provided with openings 331a and 332a or cutouts 341a and 342a facing the ventilation outlets 164 and 165, so as to easily guide the cooling air to the rear outlets 16 (ventilation outlets 164 and 165, foot outlets 166 and 167).

[0098] Furthermore, as a solution where cold air volume regulating guides 201, 202 and cold air bypass general guides 301, 302 are installed in each airflow path 3a, 3b with the partition wall 40 as the boundary, it is also possible to... Figure 10 As shown, the cold air inlets 311 and 312 are provided on the side walls 2a and 2b of the air conditioning housing 2, with cutouts 22 and 23 provided at the ends of the side walls 2a and 2b of the air conditioning housing 201 and 202, so that the cold air inlets 311 and 312 face the cutouts 22 and 23. The cold air general guides 301 and 302 are provided on the side walls 2a and 2b of the air conditioning housing 2.

[0099] That is, it can be passed through the left and right side walls 2a, 2b of the air conditioner housing 2. Figure 11 As shown in (a), the U-shaped pipe forming components 331 and 332 are used to fix the open side to the side walls 2a and 2b of the air conditioner housing 2, forming a cylindrical general-purpose cold air guide 301 and 302. Furthermore, it is also possible to... Figure 11 As shown in (b), guide plates 341, 351, 342, 352, arranged approximately parallel vertically, are installed on the side walls 2a, 2b of the air conditioning housing 2 to form general-purpose cold air guides 301, 302 that allow the air mixing chamber to be opened. These guide plates 341, 351, 342, 352 can be structures for fixing other components to the side walls 2a, 2b, or structures formed integrally with the side walls 2a, 2b.

[0100] In this structure, the amount of cold air supplied to the air mixing chamber in the air mixing dampers 101 and 102 of the left and right air flow paths 3a and 3b when they are slightly displaced from the full-heat position can be limited (the amount of temperature change of the mixed air relative to the amount of movement of the air mixing dampers from the full-heat position is adjusted), and the cold air is actively supplied to the rear outlet via the cold air bypass universal guides 301 and 302, which can ensure the linearity of the temperature change of the mixed air and avoid the state of excessive supply of cold air to the front outlet, thus achieving high temperature control performance.

[0101] It should be noted that the above example illustrates the use of a sliding damper as an air mixing damper. However, the same structure can be used for all types of air mixing dampers, including single-arm dampers where the rotating shaft is integrally located at the end of the flat damper body, butterfly dampers where the rotating shaft is integrally located in the center of the flat damper body, and rotary dampers.

[0102] Furthermore, the example described above illustrates an instance where the cold air outlet 32 ​​of the universal guide 30 faces both the central ventilation outlet 161 and the foot outlet 162, but it is not limited to this. For example, it could be configured to open to the side ventilation outlet 152 and the central ventilation outlet 161 but not to the foot outlet. In general, when the vehicle air conditioning system 1 is in bidirectional mode (a mode in which mixed air is blown from the side ventilation outlet 152, the central ventilation outlet 161, and the foot outlet 162), it is required that the temperature of the mixed air blown from the foot outlet 162 be higher than the temperature of the mixed air blown from the other outlets 152 and 161. This requirement can be met by not supplying the cold air guided by the universal guide 30 to the foot outlet 162.

[0103] Explanation of reference numerals in the attached figures

[0104] 1. Air conditioning unit for vehicles;

[0105] 2. Air conditioner housing;

[0106] 2a, 2b sidewalls;

[0107] 3, 3a, 3b airflow paths;

[0108] 6. Cooling heat exchangers (evaporators);

[0109] 7. Heat exchanger (heater core) for heating;

[0110] 8. Mainstream heating air supply channels;

[0111] 9. Mainstream airflow path;

[0112] 10. Air mixing damper;

[0113] 11. Air mixing chamber;

[0114] 15. Front blowout outlet;

[0115] 16. Rear exhaust outlet;

[0116] 20, 201, 202 Cold air volume adjustment guide;

[0117] 30, 301, 302 General-purpose guide for cold air intake;

[0118] 31, 311, 312 Cold air inlets;

[0119] 33. Baffle;

[0120] 40. Partition wall;

[0121] 151, 153 Defrosting blowout outlets;

[0122] 152 side ventilation outlets;

[0123] 161 Central ventilation outlet;

[0124] 162, 166, 167 Foot-mounted blowouts;

[0125] Ventilation outlets 164 and 165;

[0126] 331, 332 Pipe forming components;

[0127] 341, 342, 351, 352 are guide boards.

Claims

1. A vehicle air conditioning unit, comprising: The air conditioner housing (2) has an air flow path (3) formed inside it; A heat exchanger (7) for heating is disposed inside the air conditioner housing (2) to heat the air conditioning air introduced into the air flow path (3); The main warm air passage (8) allows the air conditioning air to pass through the heating heat exchanger (7) and be guided downstream as warm air; The main cold air passage (9) allows the air conditioning air to bypass the heating heat exchanger and be guided downstream as cold air; An air mixing damper (10) adjusts the ratio of warm air flowing in the warm air mainstream passage (8) to cold air flowing in the cold air mainstream passage (9). An air mixing chamber (11) is used to mix cold air passing through the cold air main channel (9) with warm air passing through the warm air main channel (8) to form mixed air. The front air outlet (15) is connected to the part of the air mixing chamber (11) near the main cold air passage (9); The rear air outlet (16) is connected to the side of the air mixing chamber (11) opposite to the main cold air passage (9); The cold air volume regulating guide (20) is formed to extend from the air conditioning housing (2) to the cold air mainstream passage (9) and restrict the amount of cold air flowing into the air mixing chamber (11) when the air mixing damper (10) is near the full heat position; The vehicle air conditioning unit is characterized in that... It is equipped with a cold air bypass universal guide (30), which introduces cold air flowing in the cold air mainstream passage (9) through the cold air inlet (31), reduces mixing with the warm air flowing in the warm air mainstream passage (8) and guides it to the rear outlet (16). The cold air volume regulating guide (20) has a cut (21) that cuts off a portion of the guide (20). The cold air inlet (31) faces the cut (21).

2. The vehicle air conditioning unit according to claim 1, characterized in that, The cold air bypass universal guide (30) is disposed on the baffle (33) disposed in the air mixing chamber (11).

3. The vehicle air conditioning unit according to claim 1, characterized in that, The universal guide (30) for cold air is disposed on both sides of the partition wall (40) that separates the airflow path (3) to the left and right.

4. The vehicle air conditioning unit according to claim 1, characterized in that, The universal guide (30) for cold air is disposed on the side wall (2a, 2b) of the air conditioner housing.

5. The vehicle air conditioning unit according to any one of claims 1 to 4, wherein, The general-purpose guide (30) for cold air directs the cold air to the plurality of rear air outlets (16).

6. The vehicle air conditioning unit according to any one of claims 1 to 5, characterized in that, The universal guide (30) for cold air is formed in a cylindrical shape.

7. The vehicle air conditioning unit according to any one of claims 1 to 5, characterized in that, The universal guide (30) for the cold air side is composed of guide plates (341, 342, 351, 352) arranged roughly parallel to each other.

8. The vehicle air conditioning unit according to any one of claims 1 to 7, wherein, The front air outlet (15) is at least one of a defrost air outlet (151) and a side ventilation air outlet (152), and the rear air outlet (16) is at least one of a central ventilation air outlet (161) and a foot air outlet (162).

9. The vehicle air conditioning unit according to any one of claims 1 to 7, wherein, The front air outlet (15) is a defrost air outlet (153), and the rear air outlet (16) is at least one of a ventilation air outlet (164, 165) and a foot air outlet (166, 167).

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