WO2020116183A1 - Vehicular air conditioning device - Google Patents

Abstract

This vehicular air conditioning device is provide with: an air conditioning case (2); a cooler (6) that is provided inside the air conditioning case, cools air, and generates cold air; heaters (7, 8) that are provided inside the air conditioning case, heat air, and generate hot air; and a hot air tunnel (50) that is provided inside the air conditioning case and guides hot air heated by the heaters. The air conditioning case is provided with a defroster opening section (21), a center face opening section (31a), and a side face opening section (31b). The hot air tunnel is provided with: a cylindrical section (51) in which hot air flows; inlet sections (52, 53) for suctioning hot air into the cylindrical section; a first outlet section (56) for blowing out hot air from the inside of the cylindrical section toward the defroster opening section; and second outlet sections (57, 257, 357) for blowing out hot air from the inside of the cylindrical section toward at least one among the center face opening section and the side face opening section.

Description

Vehicle air conditioner Cross-reference of related applications

This application is based on Japanese Patent Application No. 2018-228471 filed on December 5, 2018, the content of which is incorporated herein by reference.

The disclosure in this specification relates to a vehicle air conditioner.

[Patent Document 1] discloses a vehicle air conditioner having a warm air guide passage for guiding warm air to the defroster outlet. The hot air guide passage is a passage formed inside a tubular body that traverses the cold air passage toward the face outlet. The warm air guide passage efficiently secures the volume of warm air introduced to the defroster outlet. The face outlet has two openings, a center opening located in the center of the vehicle left-right direction and a side opening located laterally of the vehicle in the left-right direction. The descriptions of the prior art documents cited as the prior art are incorporated by reference as explanations of the technical elements in this specification.

JP, 2010-18248, A

According to the configuration of the prior art, the warm air flowing through the warm air guide passage is blown out from the warm air guide passage toward the defroster outlet. Therefore, the warm air flowing through the warm air guide passage has little influence on the conditioned air blown out from the face outlet. Therefore, even if there is a temperature difference between the conditioned air blown out from the center face outlet and the conditioned air blown out from the side face outlet, the warm air guide passage is mostly used to eliminate the temperature difference. Not contributing. In view of the above or other aspects not mentioned, there is a need for further improvements in vehicle air conditioners.

One disclosed object is to provide a vehicle air conditioner capable of reducing the temperature difference between the blowout temperature of the center face blowout port and the blowout temperature of the side face blowout port.

The vehicle air-conditioning device disclosed herein is provided in an air-conditioning case, in which an air-conditioning air flowing toward the passenger compartment flows inside, a cooler that is provided in the air-conditioning case, cools air to generate cold air, and is provided in the air-conditioning case. A heater for heating the air to generate warm air, and a warm air tunnel provided in the air conditioning case for guiding the warm air heated by the heater are provided. The air-conditioning case has a defroster opening through which air-conditioning air blows out toward the front window, a center face opening through which air-conditioning air blows out from the center of the passenger compartment toward the upper part of the front seat, and And a side face opening through which conditioned air for blowing out from the side portion toward the upper part of the front seat flows. The warm air tunnel has a tubular part through which warm air heated by a heater flows, an inlet part for sucking warm air into the tubular part, and a warm air flow from the inside of the tubular part toward the defroster opening. And a second outlet that blows warm air from the inside of the tubular portion toward at least one of the center face opening and the side face opening.

According to the disclosed vehicle air conditioner, the first outlet that blows out the warm air toward the defroster opening, and the second outlet that blows out the hot air toward at least one of the center face opening and the side face opening. Equipped with a warm air tunnel. Therefore, a part of the warm air flowing inside the warm air tunnel can be blown toward at least one of the center face opening and the side face opening. Therefore, a large amount of warm air can be sent to the opening of the center face opening and the side face opening where the conditioned air having a low temperature easily flows. In other words, the temperature difference between the temperature of the conditioned air flowing through the center face opening and the temperature of the conditioned air flowing through the side face opening can be reduced. Therefore, it is possible to provide the vehicle air conditioner capable of reducing the temperature difference between the blowout temperature of the center face blowout port and the blowout temperature of the side face blowout port.

The disclosed aspects of this specification employ different technical means to achieve their respective purposes. Reference numerals in parentheses in the claims are merely examples of correspondence with parts of the embodiments described later, and are not intended to limit the technical scope. The objects, features, and advantages disclosed in this specification will become more apparent with reference to the following detailed description and the accompanying drawings.

It is sectional drawing which shows the internal structure of the vehicle air conditioner in 1st Embodiment. It is a block diagram which shows the positional relationship of each opening part in an air conditioning case. It is a perspective view showing a warm air tunnel. It is a side view which shows a warm air tunnel. FIG. 5 is a cross-sectional view showing a cross section taken along line VV of FIG. 1. It is a perspective view which shows the warm air tunnel in 2nd Embodiment. It is sectional drawing which shows the internal structure of the vehicle air conditioner in 3rd Embodiment. It is a perspective view which shows the warm air tunnel in 3rd Embodiment. FIG. 9 is a sectional view showing a section taken along line IX-IX in FIG. 7. It is a side view which shows the warm air tunnel in 4th Embodiment.

A plurality of embodiments will be described with reference to the drawings. In embodiments, functionally and/or structurally corresponding parts and/or associated parts may be given the same reference sign or different reference signs in the hundreds or more. For the corresponding part and/or the related part, the description of other embodiments can be referred to.

First Embodiment In FIG. 1, a vehicle air conditioner 1 is mounted on a vehicle. The vehicle is, for example, an automobile equipped with a gasoline-powered engine. However, as the vehicle, an electric vehicle equipped with a traveling motor or a hybrid vehicle equipped with both an engine and a motor can be adopted. The vehicle air conditioner 1 includes an air blowing unit that blows air and an air conditioning unit that adjusts the air temperature. The vehicle air conditioner 1 is a device that adjusts the temperature of the taken-in air and blows it out into the vehicle interior. In other words, the vehicle air conditioner 1 is a device that performs air conditioning operations such as heating operation, cooling operation, and dehumidifying operation in the vehicle interior.

The vehicle air conditioner 1 includes an air conditioning case 2 in which an air path through which air flows is formed. An evaporator 6, a heater core 7, and a heater device 8 are housed inside the air conditioning case 2. The heater core 7 is located downstream of the evaporator 6 in the flow of conditioned air. The heater device 8 is located downstream of the heater core 7 in the flow of conditioned air. The evaporator 6 is a heat exchanger in which a refrigerant flows, and the heat of vaporization when the refrigerant vaporizes from a liquid to a gas is removed from the surrounding air to cool the air. The evaporator 6 provides an example of a cooler that generates cold air. The heater core 7 is a heat exchanger in which high-temperature engine cooling water flows, and heats the surrounding air by using the heat of the engine cooling water. The heater core 7 provides an example of a heater that generates warm air. As the heater device 8, various heating devices such as an electric heater and a combustion heater can be used. As the heater device 8, it is preferable to use a PTC heater which is an electric heater having a positive temperature coefficient. The heater device 8 provides an example of a heater that generates warm air.

The vehicle air conditioner 1 can perform air conditioning operation for passengers sitting in the front seats. The vehicle air conditioner 1 is provided with a defroster opening 21 for sucking the conditioned air blown out to the windshield of the vehicle into the duct. The conditioned air sucked from the defroster opening 21 is blown out from the defroster outlet through the duct to the inside of the passenger compartment of the front window. The vehicle air conditioner 1 includes a face opening portion 31 for sucking the conditioned air blown toward the upper front part of the front seat into the duct. The conditioned air sucked from the face opening 31 is blown into the vehicle compartment from the face outlet through the duct. The vehicle air conditioner 1 includes a foot opening 41 for sucking the conditioned air blown out to the lower front portion of the front seat into the duct. The conditioned air sucked from the foot opening 41 is blown into the vehicle compartment from the foot outlet through the duct.

The vehicle air conditioner 1 can perform air conditioning operation for passengers sitting in the rear seats. The vehicle air conditioner 1 includes a rear face opening 131 for sucking the conditioned air blown out to the front upper part of the rear seat into the duct. The conditioned air sucked from the rear face opening 131 passes through the duct and is blown out from the rear face outlet. The vehicle air conditioner 1 includes a rear foot opening 141 for sucking the conditioned air blown out to the lower front portion of the rear seat into the duct. The conditioned air sucked from the rear foot opening 141 is blown out from the rear foot outlet through the duct.

The vehicle air conditioner 1 includes a first cold air passage 15a, a second cold air passage 15b, a first warm air passage 16a, and a second warm air passage 16b inside an air conditioning case 2. The first cold air passage 15a and the second cold air passage 15b are passages for flowing the conditioned air without passing through the heater core 7 and the heater device 8, and the cold air cooled by the evaporator 6 passes through. .. The first warm air passage 16a and the second warm air passage 16b are passages for flowing the conditioned air through the heater core 7 and the heater device 8, and the warm air heated by the heater core 7 and the heater device 8 is Will pass. Each of the passages 15a, 15b, 16a, 16b is provided in the order of the first cool air passage 15a, the first warm air passage 16a, the second warm air passage 16b, and the second cool air passage 15b from the top in the vertical direction.

A cold/warm air mixing space for mixing cold air and warm air is formed on the downstream side of each passage 15a, 15b, 16a, 16b. In the cold/hot air mixing space, the temperature of the conditioned air becomes a temperature between the temperature of the cold air and the temperature of the hot air by mixing the cold air and the hot air. However, the temperature of the conditioned air in the cold/hot air mixing space is not uniform. In the cold/hot air mixing space, the temperature tends to be low at a position close to the first cold air passage 15a and the second cold air passage 15b. On the other hand, in the cold/hot air mixing space, the temperature tends to be high at a position close to the first warm air passage 16a and the second warm air passage 16b. Further, as the air flows away from the passages 15a, 15b, 16a, 16b toward the downstream side, the mixing of the warm air and the cold air progresses, and the temperature of the conditioned air tends to approach a uniform temperature.

The vehicle air conditioner 1 includes a first air mix door 12a and a second air mix door 12b. The first air mix door 12a and the second air mix door 12b are located downstream of the evaporator 6 and upstream of the heater core 7 and the heater device 8. The second air mix door 12b is located below the first air mix door 12a.

By closing the first cold air passage 15a, the first air mix door 12a can be in a state where the conditioned air does not pass through the first cold air passage 15a but passes through the first warm air passage 16a. Alternatively, the first air mix door 12a can close the first warm air passage 16a so that the conditioned air does not pass through the first warm air passage 16a but passes through the first cold air passage 15a. The first air mix door 12a opens the first cold air passage 15a and the first warm air passage 16a at the same time so that the conditioned air passes through the first cold air passage 15a and the first warm air passage 16a at the same time. can do. At this time, by adjusting the ratio between the amount of opening the first cold air passage 15a and the amount of opening the first warm air passage 16a, the air volume of the required temperature is adjusted by adjusting the air volume of the cool air and the air volume of the warm air as a whole. Can be wind.

The second air mix door 12b can close the second cold air passage 15b so that the conditioned air does not pass through the second cold air passage 15b but passes through the second warm air passage 16b. Alternatively, the second air mix door 12b can close the second warm air passage 16b so that the conditioned air does not pass through the second warm air passage 16b but passes through the second cool air passage 15b. The second air mix door 12b opens the second cold air passage 15b and the second warm air passage 16b at the same time so that the conditioned air passes through the second cold air passage 15b and the second warm air passage 16b at the same time. can do. At this time, by adjusting the ratio between the amount of opening the second cold air passage 15b and the amount of opening the second warm air passage 16b, the air volume of the required temperature is adjusted by adjusting the air volume of the cool air and the air volume of the warm air as a whole. Can be wind.

FIG. 2 is a front view showing a schematic configuration of the air conditioning case 2, and includes a defroster opening 21, a face opening 31, a foot opening 41, a rear face opening 131, and a rear foot opening 141 in the air conditioning case 2. Shows the positional relationship of.

The face opening 31 includes a center face opening 31a and a side face opening 31b. The center face opening 31a is an opening through which conditioned air blown from the center of the vehicle compartment toward the upper part of the front seat flows. In other words, the center face opening 31a is a center face suction port that sucks in the conditioned air flowing toward the center face blowing port. The center face openings 31a are provided at two locations on the air conditioning case 2. The two center face openings 31a are arranged adjacent to each other in the left-right direction.

The side face opening 31b is an opening through which the conditioned air blown from the side of the passenger compartment toward the upper part of the front seat flows. In other words, the side face opening 31b is a side face suction port that sucks in the conditioned air flowing toward the side face outlet. The side face openings 31b are provided at two locations on the air conditioning case 2. The two side face openings 31b are arranged on both outer sides in the direction in which the two center face openings 31a are arranged. In other words, the face opening 31 includes four openings arranged side by side in the left-right direction. Of the four aligned openings, the two openings located inside are the center face openings 31a, and the two openings located outside are the side face openings 31b.

The face opening 31 does not have to be composed of four openings. For example, only one opening may be provided, and the inside of the opening may be partitioned into a plurality of openings to send conditioned air to the center face outlet and the side face outlet. In other words, the face opening 31 may be configured with a number of openings less than four. Alternatively, four openings arranged in the left-right direction are provided in two steps in the vertical direction, and the eight openings are used to finely adjust the air volume and direction of the conditioned air blown from the center face outlet and the side face outlets. It may be possible. In other words, the face openings 31 may be composed of more than four openings.

The foot openings 41 are provided in the lower part of the air conditioning case 2, and are provided at one location on each of the left side surface and the right side surface that form the left and right side surfaces of the air conditioning case 2. The rear face opening 131 is provided in the lower part of the air conditioning case 2 and near the center of the air conditioning case 2 including the center position in the left-right direction. The rear foot openings 141 are provided at two positions on the lower surface of the air conditioning case 2 so as to be separated from each other in the left-right direction. In other words, in the air conditioning case 2, the rear foot opening 141 is formed closer to the center in the left-right direction than the foot opening 41. Further, a rear face opening 131 is formed closer to the center in the left-right direction than the rear foot opening 141.

In FIG. 1, the vehicle air conditioner 1 includes a defroster door 22 that opens and closes the defroster opening 21. The defroster door 22 can be switched between two states, a closed state in which the defroster opening 21 is closed and an open state in which the defroster opening 21 is opened. When the defroster door 22 is in the open state, there are a fully open state in which the conditioned air is sucked into the defroster opening 21 most, and a small open state in which the conditioned air is sucked into the defroster opening 21 is less than the fully opened state and more than the closed state. I have it.

The vehicle air conditioner 1 includes a face door 32 that opens and closes the face opening 31. The face door 32 can be switched between two states, a closed state in which the face opening 31 is closed and an open state in which the face opening 31 is opened. In the open state of the face door 32, there are a fully open state in which the air conditioning wind sucked into the face opening 31 is the largest and a small open state in which the air conditioning air sucked into the face opening 31 is less than the fully opened state and more than the closed state. I have it. The vehicle air conditioner 1 includes a rear face door that opens and closes the rear face opening 131. The rear face door is interlocked with the face door 32, and is configured such that the opening of the face door 32 and the opening of the rear face door are equal. However, the opening degree may be controlled independently of each other without interlocking the face door 32 and the rear face door.

The vehicle air conditioner 1 includes a foot door 42 that opens and closes the foot opening 41. The foot door 42 can be switched between two states, a closed state in which the foot opening 41 is closed and an open state in which the foot opening 41 is opened. In the open state of the foot door 42, there are a fully open state in which the conditioned air is sucked into the foot opening 41 most, and a small open state in which the conditioned air is sucked into the foot opening 41 is less than the fully opened state and more than the closed state. ing. The vehicle air conditioner 1 includes a rear foot door that opens and closes the rear foot opening 141. The rear foot door is interlocked with the foot door 42, and is configured such that the opening degree of the foot door 42 and the opening degree of the rear foot door are equal. However, the opening degree may be controlled independently of each other without interlocking the foot door 42 and the rear foot door.

Each mode installed in the vehicle air conditioner 1 will be described below. The vehicle air conditioner 1 has five modes as a blowout mode: a defroster mode, a face mode, a foot mode, a bi-level (B/L) mode, and a foot defroster (F/D) mode. However, the types of outlet modes are not limited to the above modes.

　Defroster mode is a mode that blows out air-conditioned air from the defroster outlet. In the defroster mode, the defroster door 22 is opened and the face door 32 and the foot door 42 are closed. The defroster mode is often used to eliminate fog on the front window.

Face mode is a mode in which conditioned air is blown from the face outlet and the rear face outlet. In the face mode, the face door 32 is opened and the defroster door 22 and the foot door 42 are closed. Face mode is often used during cooling operation.

▽Foot mode is a mode that blows out conditioned air mainly from the foot outlet and the rear foot outlet. In the foot mode, the foot door 42 is open. On the other hand, the face door 32 is in the closed state, and the defroster door 22 is in the slightly opened state in which it is slightly opened. The foot mode is often used during heating operation.

The bi-level (B/L) mode is a mode in which approximately the same amount of conditioned air is blown out from each of the face outlet, the rear face outlet, the foot outlet, and the rear foot outlet. In the bi-level (B/L) mode, the face door 32 and the foot door 42 are open, and the defroster door 22 is closed. The bi-level (B/L) mode is often used during air conditioning operation at an intermediate temperature between cooling and heating.

The foot defroster (F/D) mode is a mode in which approximately the same amount of conditioned air is blown from each of the foot outlet, the rear foot outlet, and the defroster outlet. In the foot defroster (F/D) mode, the foot door 42 and the defroster door 22 are open, and the face door 32 is closed. The foot defroster (F/D) mode is often used when the windshield becomes cloudy during the heating operation in the foot mode.

In the vehicle air conditioner 1, a warm air tunnel 50 is provided at a position across the first cold air passage 15a and the first warm air passage 16a. The warm air tunnel 50 is located downstream of the evaporator 6, the heater core 7, and the heater device 8 and upstream of the defroster door 22 and the face door 32. The warm air tunnel 50 is a component through which warm air flows in a portion formed in a tubular shape. The axial direction at the downstream end of the tubular portion of the warm air tunnel 50 is the direction toward the defroster opening 21. Therefore, the hot air tunnel 50 provides an air passage for blowing the hot air that has passed through the first warm air passage 16a and the second warm air passage 16b toward the defroster opening 21.

In FIG. 3, the warm air tunnel 50 includes a first member 50a and a second member 50b. In the warm air tunnel 50 including the first member 50a and the second member 50b, the plate member 99 is arranged between the first member 50a and the second member 50b. Due to the plate member 99, the inside of the warm air tunnel 50 is divided into right and left. The first member 50a and the second member 50b are bilaterally symmetrical with respect to the plate member 99. However, the warm air tunnel 50 is not limited to the one configured by a plurality of divided members. For example, the warm air tunnel 50 may be composed of one continuous component.

The warm air tunnel 50 includes a tubular portion 51. The tubular portion 51 includes an upstream inlet portion 52 and a downstream inlet portion 53. The upstream inlet portion 52 is an open end located at the end of the tubular portion 51 in the longitudinal direction. The upstream inlet 52 serves as an inlet for sucking in conditioned air in which warm air that has passed through the first warm air passage 16a, warm air that has passed through the second warm air passage 16b, and cold air that has passed through the second cold air passage 15b are mixed. It is a functional part. However, the upstream inlet portion 52 is provided at a position closer to the first warm air passage 16a and the second warm air passage 16b than the second cold air passage 15b. Therefore, it is easy to inhale the conditioned air having a relatively high temperature. The downstream inlet portion 53 is provided downstream of the upstream inlet portion 52 of the tubular portion 51. The downstream inlet portion 53 is a portion that functions as an inlet for sucking the warm air that has passed through the first warm air passage 16a. The upstream inlet portion 52 provides an example of the inlet portion. The downstream inlet portion 53 provides an example of the inlet portion.

The tubular portion 51 includes a side surface portion 55, an upper surface portion, and a lower surface portion. The tubular portion 51 is a rectangular tubular shape having two side surfaces, an upper surface, and a lower surface. The side surface portion 55 is configured by a first side surface portion 55a provided on the first member 50a and a second side surface portion 55b provided on the second member 50b. The first side surface portion 55a and the second side surface portion 55b face each other. An upper surface portion forming the upper surface of the tubular portion 51 and a lower surface portion forming the lower surface of the tubular portion 51 face each other.

The tubular portion 51 includes a first outlet portion 56 and a second outlet portion 57. The first outlet portion 56 is an open end located at the end of the tubular portion 51 in the longitudinal direction. The first outlet portion 56 is an opening for blowing warm air in a direction along the axial direction of the tubular portion 51. The first outlet 56 is a portion that functions as an outlet that blows the conditioned air toward the defroster opening 21. As a result, hot air having a temperature as high as possible is guided to the defroster opening portion 21 to increase the temperature of the conditioned air blown out from the defroster outlet. The first outlet portion 56 is formed between the end portion of the first side surface portion 55 a in the longitudinal direction of the side surface portion 55 and the end portion of the second side surface portion 55 b in the longitudinal direction of the side surface portion 55. The lower side of the first outlet portion 56 is closed by the lower surface portion. On the other hand, the upper side of the first outlet portion 56 is not closed by the upper surface portion but is open. Of the two end portions in the longitudinal direction of the side surface portion 55, one end portion constitutes a part of the first outlet portion 56, and the other end portion constitutes a part of the upstream inlet portion 52. ..

The second outlet part 57 is an opening provided on the path from the upstream inlet part 52 to the first outlet part 56 in the tubular part 51. In other words, the second outlet portion 57 is provided between the upstream inlet portion 52 and the first outlet portion 56. The second outlet portion 57 is an opening for blowing warm air in a direction intersecting the axial direction of the tubular portion 51. Therefore, the warm air blowing direction of the second outlet portion 57 is different from the warm air blowing direction of the first outlet portion 56. The second outlet 57 is a portion that functions as an outlet that blows the conditioned air toward the face opening 31. As a result, the hot air having a temperature as high as possible is guided to the face opening portion 31 to raise the temperature of the conditioned air blown out from the face outlet. The second outlet portion 57 is formed between the end portion of the first side surface portion 55a in the lateral direction of the side surface portion 55 and the end portion of the second side surface portion 55b in the lateral direction of the side surface portion 55. The second outlet portion 57 is formed on the upper surface portion of the tubular portion 51.

The warm air tunnel 50 is provided with an outer frame portion 61 outside the tubular portion 51. The outer frame portion 61 is a member that guides the flow of conditioned air on the outside of the tubular portion 51 in the warm air tunnel 50. The temperature of the conditioned air flowing through the outer frame portion 61 is lower than that of the warm air flowing inside the tubular portion 51. The outer frame portion 61 is provided with a plurality of openings that function as inlets for conditioned air. The outer frame portion 61 is provided with a plurality of openings that function as outlets for conditioned air. The outer frame portion 61 provides an attachment function for attaching the warm air tunnel 50 to the air conditioning case 2.

In FIG. 4, a portion of the opening end of the second outlet portion 57 is continuous with a portion of the opening end of the first outlet portion 56, and the first outlet portion 56 and the second outlet portion 57 are continuous with each other. One L-shaped opening is formed. In other words, in the L-shaped opening that forms the first outlet portion 56 and the second outlet portion 57, the portion that is opened toward the defroster opening portion 21 is the first outlet portion 56 and the face opening portion 31 is The portion opened toward the second outlet 57.

The length L2 of the second outlet portion 57 in the direction along the longitudinal direction of the tubular portion 51 is longer than the length L1 of the first outlet portion 56 in the direction along the lateral direction of the tubular portion 51. The horizontal length of the first outlet portion 56 and the horizontal length of the second outlet portion 57 are equal. Therefore, the opening area of the second outlet portion 57 is larger than the opening area of the first outlet portion 56. Therefore, the second outlet portion 57 is configured to be able to blow warm air over a wider range than the first outlet portion 56. Accordingly, the warm air that is easily blown out from the first outlet portion 56 along the axial direction is easily blown out from the second outlet portion 57 along the direction intersecting the axial direction of the tubular portion 51. However, the amount of warm air blown out from the first outlet 56 is larger than the amount of warm air blown out from the second outlet 57.

The magnitude relationship between the opening area of the first outlet portion 56 and the opening area of the second outlet portion 57 is not limited to the case where the opening area of the second outlet portion 57 is larger than the opening area of the first outlet portion 56. The opening area of the second outlet portion 57 may be smaller than the opening area of the first outlet portion 56. Alternatively, the opening area of the second outlet portion 57 may be equal to the opening area of the first outlet portion 56.

A merging portion 60 is provided inside the tubular portion 51. The merging portion 60 is a portion that joins the warm air sucked from the upstream inlet portion 52 and the warm air sucked from the downstream inlet portion 53. The merging portion 60 is provided downstream of the upstream inlet portion 52 and the downstream inlet portion 53 and upstream of the first outlet portion 56 and the second outlet portion 57. The merging portion 60 is provided at a position closer to the second outlet portion 57 than the first outlet portion 56. In the merging portion 60, the warm air sucked from the upstream inlet portion 52 flows from the rear toward the front. On the other hand, the warm air sucked from the downstream inlet portion 53 flows from the lower side toward the upper side. The hot air sucked into the tubular portion 51 in different directions collides with each other at the confluence portion 60. That is, the turbulence occurs in the flow of warm air at the merging portion 60. Therefore, the amount of warm air blown from the second outlet 57 can be increased by changing the flow of warm air due to the merging of warm air at the merging portion 60.

The tubular portion 51 includes a bent portion 54 on the lower surface of the tubular portion 51. The bent portion 54 is provided at a substantially intermediate position in the longitudinal direction of the tubular portion 51. The bent portion 54 is continuous with the flat portion and forms the lower surface portion of the tubular portion 51. The bent portion 54 is provided downstream of the upstream inlet portion 52 and the downstream inlet portion 53 and upstream of the first outlet portion 56 and the second outlet portion 57. The bent portion 54 is provided at a position closer to the second outlet portion 57 than the first outlet portion 56. The downstream end of the bent portion 54 is located upstream of the downstream end of the second outlet 57 in the flow of warm air. Further, the upstream end of the bent portion 54 is located upstream of the upstream end of the second outlet 57 in the warm air flow. The bent portion 54 has a shape in which a cross section is curved in an arc shape. The bent portion 54 is curved so as to project toward the inside of the tubular portion 51.

The bent portion 54 is a portion that partially bends the flow of the warm air flowing inside the tubular portion 51, thereby changing the linear flow of the warm air and disturbing the flow. In the hot air passing near the bent portion 54, a local pressure difference occurs in the flow of the warm air before and after the bent portion 54. Therefore, in the velocity vector of the flow of the warm air, the component in the direction of blowing out from the second outlet 57 increases compared to the case where the bent portion 54 is not provided. Therefore, the amount of warm air blown out from the second outlet 57 can be increased by causing the bent portion 54 to change the flow of warm air. Here, the amount of warm air blown from the first outlet 56 and the amount of warm air blown from the second outlet 57 can be adjusted by the size and shape of the bent portion 54. For example, by increasing the size of the bent portion 54 to increase the influence of the bent portion 54 on the flow of warm air, the proportion of warm air blown out from the first outlet portion 56 is reduced, and The proportion of warm air blown out from the second outlet 57 can be increased.

A guide rib extending toward the bent portion 54 is provided on the upper surface of the tubular portion 51. For this reason, the warm air flowing along the upper surface portion, which is a position away from the bent portion 54, is guided by the guide ribs in a direction approaching the bent portion 54. Therefore, the influence of the bent portion 54 on the flow of warm air can be adjusted by the shape and size of the guide rib.

FIG. 5 is a cross-sectional view schematically showing the positional relationship between the warm air tunnel 50 and the face opening 31. The warm air tunnel 50 is located substantially at the center of the air conditioning case 2 in the left-right direction. In other words, the warm air tunnel 50 is provided at a position closer to the center face opening 31a than the side face opening 31b. The warm air tunnel 50 is located at an equal distance from the two center face openings 31a provided side by side in the left-right direction.

A plate member 99 that penetrates the warm air tunnel 50 is provided at the center of the warm air tunnel 50. The distance from the end on the face opening 31 side of the plate member 99 to the face opening 31 is shorter than the distance from the end on the face opening 31 side of the warm air tunnel 50 to the face opening 31. The plate member 99 provides a guide function of guiding the warm air blown out from the second outlet 57 toward the center face opening 31a. The second outlet portion 57 is provided on the upper surface of the tubular portion 51 in the same shape for each of the first member 50a and the second member 50b.

The flow of the conditioned air around the face opening 31 including the warm air blown from the second outlet 57 of the warm air tunnel 50 will be described below. Air-conditioned air of various temperatures is sucked into the face opening 31. More specifically, the cool air that has passed through the first cold air passage 15a is sucked into the face opening 31. In addition, the face opening 31 is sucked with conditioned air in which the cool air that has passed through the second cold air passage 15b and the hot air that has passed through the first warm air passage 16a or the second warm air passage 16b are mixed. Further, part of the warm air that has passed through the warm air tunnel 50 is sucked into the face opening 31. Here, the flow of the warm air that passes through the warm air tunnel 50 and is sucked into the face opening 31 is the flow indicated by the arrow F1 in the figure.

A part of the warm air flowing through the warm air tunnel 50 is blown out from the second outlet 57 without reaching the first outlet 56. The blowing direction of the warm air blown out from the second outlet portion 57 is a direction along the flow direction of the cold air passing through the first cold air passage 15a. Therefore, the cold air and the hot air flow toward the face opening 31 while maintaining a state of flowing in substantially parallel to each other. In other words, the warm air blown out from the second outlet 57 flows in a direction intersecting the axial direction of the tubular portion 51. The warm air blown out from the second outlet portion 57 is sucked into the center face opening 31a, which is closer to the side face opening 31b, than the side face opening 31b. Therefore, the conditioned air sucked into the center face opening 31a tends to have a higher proportion of warm air than the conditioned air sucked into the side face opening 31b.

By changing the size of the opening area of the second outlet 57, the temperature of the conditioned air sucked into the center face opening 31a can be adjusted. By increasing the opening area of the second outlet portion 57, the proportion of warm air blown out from the first outlet portion 56 can be reduced and the proportion of warm air blown out from the second outlet portion 57 can be increased. In other words, the proportion of warm air toward the defroster opening 21 can be reduced and the proportion of warm air toward the center face opening 31a can be increased. As a result, it is easy to increase the effect of increasing the temperature of the conditioned air blown from the center face blowout port obtained by the warm air tunnel 50. On the other hand, by reducing the opening area of the second outlet portion 57, the proportion of warm air blown out from the first outlet portion 56 can be increased and the proportion of warm air blown out from the second outlet portion 57 can be reduced. it can. In other words, the proportion of warm air toward the defroster opening 21 can be increased and the proportion of warm air toward the center face opening 31a can be reduced. As a result, it is easy to reduce the effect of increasing the temperature of the conditioned air blown from the center face blowout port obtained by the warm air tunnel 50.

If the rear face opening 131 is open, some air conditioning air will be sucked into the rear face opening 131. Therefore, as compared with the case where the rear face opening 131 is closed, the cool air passing through the second cool air passage 15b is less likely to flow toward the center face opening 31a. On the other hand, with respect to the warm air that has passed through the second warm air passage 16b, similarly, since some of the warm air is sucked into the rear face opening 131, it is difficult to flow toward the center face opening 31a. However, the rear face opening 131 is arranged at a position closer to the second cold air passage 15b than the second warm air passage 16b, and it is easier to suck in more cool air than warm air. Therefore, when the rear face opening 131 is open, the amount of cool air flowing from the second cool air passage 15b to the center face opening 31a is smaller than the amount of cool air moving from the second cool air passage 15b to the side face opening 31b. Is easy to decrease. Therefore, the temperature of the conditioned air sucked into the center face opening 31a tends to be higher than the temperature of the conditioned air sucked into the side face opening 31b.

When the foot opening 41 is open, part of the conditioned air will be sucked into the foot opening 41. Therefore, the warm air is less likely to flow toward the side face opening 31b as compared with the case where the foot opening 41 is closed. Therefore, when the foot opening 41 is open, the amount of warm air directed toward the side face opening 31b tends to be smaller than the amount of warm air directed toward the center face opening 31a. Therefore, the temperature of the conditioned air sucked into the side face opening 31b tends to be lower than the temperature of the conditioned air sucked into the center face opening 31a.

As described above, the temperature of the conditioned air sucked into the center face opening 31a and the temperature of the conditioned air sucked into the side face opening 31b are sucked into the suction openings such as the rear face opening 131 and the foot opening 41. It changes depending on the amount of air conditioning air. Therefore, a temperature difference may occur between the conditioned air blown from the center face blowout port and the conditioned air blown from the side face blowout port. When the occupant feels the temperature difference of the conditioned air, the occupant may feel uncomfortable with the air conditioning operation of the vehicle air conditioner 1. Alternatively, there is a possibility of misunderstanding that the vehicle air conditioner 1 is out of order.

Also, depending on the internal shape of the air conditioning case 2, there may be a temperature difference between the air conditioning air blown from the center face air outlet and the air conditioning air blown from the side face air outlet. For example, when the guide ribs are provided so that the cool air can easily reach the center face outlet, the temperature of the air conditioning air blown from the center face air outlet is lower than that of the air conditioning air blown from the side face air outlet. Prone.

Further, even when the temperature of the evaporator 6 and the heater core 7 is not uniform in the left-right direction, a cause of a difference in temperature between the air conditioning air blown from the center face air outlet and the air conditioning air blown from the side face air outlet Becomes

The second outlet portion 57 provided in the warm air tunnel 50 can eliminate the temperature difference between the conditioned air blown from the center face outlet and the conditioned air blown from the rear face outlet. That is, when the temperature of the conditioned air sucked in the center face opening 31a tends to be lower than the temperature of the conditioned air sucked in the side face opening 31b, a large amount of warm air is blown out from the second outlet 57. As a result, the temperature of the conditioned air sucked into the center face opening 31a is raised, and the temperature difference from the conditioned air sucked into the side face opening 31b is eliminated. In a mode such as the face mode or the bi-level (B/L) mode in which the conditioned air is blown from the face outlet, it is possible to eliminate the temperature difference in the conditioned air blowing temperature.

According to the above-described embodiment, the warm air tunnel 50 includes the second outlet 57 that blows warm air toward the center face opening 31a or the side face opening 31b. For this reason, it is easy to make the temperature of the conditioned air sucked in uniform regardless of the position of the face opening 31. In other words, the temperature of the conditioned air blown from the face outlet can be made substantially uniform regardless of the position of the face outlet. Therefore, it is easy to suppress a situation in which an occupant feels uncomfortable in the air conditioning operation due to the temperature difference of the conditioned air depending on the blowing position. Therefore, it is easy to improve the comfort of the air conditioning operation by the vehicle air conditioner 1. In particular, the air-conditioning case 2 of the vehicle air-conditioning system 1 has various shapes depending on the vehicle type, and the internal configuration is often different. Therefore, it is very useful to reduce the temperature difference by changing the shape of the warm air tunnel 50, which is a separate component from the air conditioning case 2, instead of changing the shape of the air conditioning case 2.

The warm air tunnel 50 is provided with a second outlet 57 that blows warm air toward the center face opening 31a. Therefore, it is easy to increase the temperature of the conditioned air sucked from the center face opening 31a and adjust the temperature to the same temperature as the temperature of the conditioned air sucked from the side face opening 31b. Therefore, it is easy to suppress a situation in which an occupant feels uncomfortable in the air conditioning operation due to the temperature difference of the conditioned air depending on the blowing position.

The warm air tunnel 50 includes a first outlet 56 and a second outlet 57. Therefore, it is possible to provide two functions, that is, a function of blowing hot air toward the defroster opening portion 21 and a function of blowing warm air toward the center face opening portion 31a with one component. Therefore, the warm air tunnel 50 can be made smaller than in the case where the component for blowing the warm air toward the defroster opening 21 and the component for blowing the warm air toward the center face opening 31a are provided as separate components. Easy to make small and lightweight.

The first outlet 56 blows warm air in the direction along the axial direction of the tubular portion 51, and the second outlet 57 blows hot air in the direction intersecting the axial direction of the tubular portion 51. Here, the warm air flowing through the tubular portion 51 easily maintains the flow along the axial direction of the tubular portion 51. Therefore, the warm air is blown from the first outlet portion 56 blown in the axial direction of the tubular portion 51 rather than the second outlet portion 57 blown in a direction different from the axial direction of the tubular portion 51. Easy to be blown out. Therefore, the warm air tunnel 50 is more likely to supply warm air to the defroster opening 21 than to the face opening 31. Therefore, it is easy to raise the temperature of the conditioned air blown from the defroster outlet to smoothly eliminate the fogging of the front window. Further, as compared with the case where the hot air is blown out in a direction intersecting the axial direction of the tubular portion 51 with both the first outlet portion 56 and the second outlet portion 57, the hot air blowing from the warm air tunnel 50. Is easy to do.

The second outlet portion 57 is provided between the downstream inlet portion 53 and the first outlet portion 56. In other words, the second outlet portion 57 is located upstream of the first outlet portion 56 in the flow of warm air flowing inside the warm air tunnel 50. Therefore, in the process of the warm air flowing toward the first outlet portion 56, a part of the warm air will pass near the second outlet portion 57. Therefore, it is easy to properly secure the amount of warm air blown out from the second outlet portion 57.

Includes a merging unit 60 that joins the warm air sucked from the upstream inlet 52 and the warm air sucked from the downstream inlet 53. Therefore, the two hot air streams are mixed at the merging portion 60, and thus the streams are likely to flow first from the merging portion 60 in a turbulent state. Therefore, it is easier to secure a large amount of warm air blown out from the second outlet portion 57, compared to a case where warm air is allowed to flow inside the warm air tunnel 50 without providing the confluence portion 60. Further, by adjusting the distance from the merging portion 60 to the second outlet portion 57, it is possible to adjust the influence of turbulence in the flow of warm air passing near the second outlet portion 57. In other words, as the distance from the merging portion 60 to the second outlet portion 57 is shortened, the hot air flows to the vicinity of the second outlet portion 57 in a state of being greatly disturbed. Therefore, it is easy to adjust the amount of hot air blown out from the second outlet 57.

The tubular portion 51 includes a bent portion 54 between the upstream inlet portion 52 and the downstream inlet portion 53 and the second outlet portion 57. Therefore, due to the action of the bent portion 54, the flow of the warm air flowing around the bent portion 54 is disturbed, and the proportion of the warm air blown out from the second outlet portion 57 is adjusted when the bent portion 54 is not formed. Can be increased compared to. In addition, by adjusting the shape of the bent portion 54 and the distance between the bent portion 54 and the second outlet portion 57, the proportion of warm air blown out from the first outlet portion 56 and the proportion of warm air blown out from the first outlet portion 56. The proportion of warm air can be adjusted. Therefore, it is easy to appropriately adjust the amount of hot air blown out from the second outlet 57.

The opening area of the second outlet portion 57 is larger than the opening area of the first outlet portion 56. Therefore, it is easy to secure the warm air blown out from the second outlet 57. Here, the second outlet portion 57 needs to blow hot air along a direction intersecting the axial direction of the tubular portion 51. In other words, the hot air is less likely to be blown out from the second outlet portion 57 than the first outlet portion 56. Therefore, making the opening area of the second outlet portion 57 larger than the opening area of the first outlet portion 56 is very useful for appropriately securing the amount of warm air blown out from the second outlet portion 57.

The first outlet portion 56 and the second outlet portion 57 are one continuous opening. Therefore, there is no portion in the warm air tunnel 50 that separates the first outlet portion 56 and the second outlet portion 57. Therefore, even if hot air is blown out vigorously from the first outlet portion 56 and the second outlet portion 57, damage and deformation are caused in the peripheral portion of the first outlet portion 56 and the peripheral portion of the second outlet portion 57 of the warm air tunnel 50. Is hard to cause. Therefore, the warm air is easily blown out properly by the warm air tunnel 50. Further, it is easier to process as compared with the case of providing a plurality of openings. Therefore, it is easy to improve the manufacturability of the warm air tunnel 50. Further, it is easier to secure a large size of the opening as compared with the case where the first outlet 56 and the second outlet 57 are formed as separate openings. Therefore, it is easy to reduce the pressure loss when the hot air is blown from the first outlet portion 56 and the second outlet portion 57. Furthermore, it is easy to reduce the sound generated when the hot air is blown from the second outlet portion 57.

Second Embodiment This embodiment is a modification based on the preceding embodiment. In this embodiment, the second outlet 257 provided in the warm air tunnel 50 is composed of the second upstream outlet 257a and the second downstream outlet 257b.

In FIG. 6, the warm air tunnel 50 includes a second upstream outlet portion 257a and a second downstream outlet portion 257b. The second upstream outlet portion 257a and the second downstream outlet portion 257b are provided side by side on the upper surface portion along the longitudinal direction of the tubular portion 51. Both the second upstream outlet 257a and the second downstream outlet 257b are openings for blowing warm air toward the center face opening 31a. The second upstream outlet 257a is provided at a position closer to the upstream inlet 52 and the downstream inlet 53 than the second downstream outlet 257b. The second downstream outlet portion 257b is provided at a position farther from the upstream inlet portion 52 and the downstream inlet portion 53 than the second upstream outlet portion 257a and the first outlet portion 56. The second downstream outlet portion 257b is an opening for blowing out a part of the warm air blown from the first outlet portion 56 toward the center face opening portion 31a.

The opening area of the second upstream outlet portion 257a is smaller than the opening area of the first outlet portion 56. The opening area of the second downstream outlet portion 257b is smaller than the opening area of the first outlet portion 56. The opening area of the second outlet portion 257, which is the sum of the opening areas of the second upstream outlet portion 257a and the second downstream outlet portion 257b, is larger than the opening area of the first outlet portion 56.

The second upstream outlet portion 257a and the first outlet portion 56 are openings separated from each other. The second downstream outlet portion 257b and the first outlet portion 56 are openings separated from each other. The second upstream outlet portion 257a and the second downstream outlet portion 257b are openings separated from each other. In other words, the openings of the first outlet 56 and the second outlet 257 are not continuous with each other and are provided independently of each other.

The warm air tunnel 50 is provided with a reinforcing portion 262 that is integrally formed continuously with the outer frame portion 61. The reinforcing portion 262 suppresses the cylindrical portion 51 from being largely deformed. The reinforcing portion 262 suppresses the first outlet portion 56 and the second outlet portion 257 from being displaced from appropriate positions.

According to the above-described embodiment, the first outlet portion 56 and the second outlet portion 257 are openings separated from each other. Therefore, the warm air blown out from the first outlet portion 56 and the warm air blown out from the second outlet portion 257 are less likely to affect each other. Therefore, the warm air blown out from the first outlet portion 56 can be easily guided to the defroster opening portion 21. Further, the warm air blown out from the second outlet portion 257 can be easily guided to the face opening portion 31. Therefore, it is easy to stabilize the blowing direction and the blowing amount of the warm air from the warm air tunnel 50.

The second outlet section 257 includes a second upstream outlet section 257a and a second downstream outlet section 257b. In other words, the second outlet portion 257 has a plurality of openings separated from each other. Therefore, it is possible to finely adjust the blowing position of the warm air from the warm air tunnel 50 toward the face opening 31. Therefore, the amount of warm air blown toward the face opening 31 can be easily adjusted according to the shape of the air conditioning case 2 and the position of the face door 32.

Third Embodiment This embodiment is a modification based on the preceding embodiment as a basic form. In this embodiment, the second outlet portion 357 is configured to blow hot air toward the side face opening portion 31b.

In FIG. 7, the warm air tunnel 50 includes a second outlet portion 357. The second outlet 357 is provided on the path through which the conditioned air flows from the first cold air passage 15a to the face opening 31. Therefore, the warm air blown out from the second outlet portion 357 is likely to be mixed with the cold air flowing through the first cold air passage 15a. In particular, the second outlet portion 357 is located approximately in the middle between the upper end surface and the lower end surface of the portion forming the first cold air passage 15a in the air conditioning case 2. Therefore, it is easy to uniformly apply the warm air to the cold air flowing through the first cold air passage 15a.

In FIG. 8, the second outlet portion 357 is an opening for blowing warm air toward the side face opening portion 31b. The second outlet portion 357 is a rectangular opening. The second outlet 357 is provided on the side surface 55. The second outlet portion 357 is provided upstream of the first outlet portion 56 in the flow of warm air flowing inside the warm air tunnel 50. Therefore, warm air can be easily blown out from the second outlet 57.

The warm air tunnel 50 includes a wall portion 358 between the first outlet portion 56 and the second outlet portion 357. The wall portion 358 is a portion that separates the first outlet portion 56 and the second outlet portion 357 from each other. The wall portion 358 has a function of guiding the warm air not blown out from the second outlet portion 357 toward the first outlet portion 56.

FIG. 9 is a cross-sectional view schematically showing the positional relationship between the warm air tunnel 50 and the face opening 31. The second outlet portion 357 is provided on each of the first side surface portion 55a and the second side surface portion 55b forming the side surface portion 55 of the tubular portion 51.

The flow of the conditioned air around the face opening 31 including the warm air blown from the second outlet 357 of the warm air tunnel 50 will be described below. The face opening 31 is sucked with the mixed air in which the cold air and the warm air are mixed and the cold air that has passed through the first cold air passage 15a. Furthermore, the hot air blown from the second outlet 357 is sucked into the face opening 31. Here, the flow of the warm air that passes through the warm air tunnel 50 and is sucked into the face opening 31 is the flow indicated by the arrow F2 in the figure.

The blowing direction of the warm air blown out from the second outlet portion 357 is a direction orthogonal to the flow direction of the cold air passing through the first cold air passage 15a. For this reason, the cool air and the warm air flow toward the face opening 31 after colliding with each other. In other words, the warm air blown out from the second outlet 357 flows away from the warm air tunnel 50 in the left-right direction, and also flows toward the face opening 31. The warm air blown from the second outlet 57 is sucked into the side face opening 31b more than the center face opening 31a. Therefore, the conditioned air sucked into the side face opening 31b is likely to have a higher proportion of warm air than the conditioned air sucked into the center face opening 31a.

By the second outlet 357 provided in the warm air tunnel 50, it is possible to eliminate the temperature difference between the conditioned air blown out from the center face outlet and the conditioned air blown out from the rear face outlet. That is, when the temperature of the conditioned air sucked in the side face opening 31b tends to be lower than the temperature of the conditioned air sucked in the center face opening 31a, a large amount of warm air is blown out from the second outlet 357. As a result, the temperature of the conditioned air sucked into the side face opening 31b is raised, and the temperature difference from the conditioned air sucked into the center face opening 31a is eliminated.

According to the above-described embodiment, the warm air tunnel 50 includes the second outlet portion 357 that blows the warm air toward the side face opening 31b. Therefore, it is easy to increase the temperature of the conditioned air sucked from the side face opening 31b and adjust the temperature to the same temperature as the temperature of the conditioned air sucked from the center face opening 31a. Therefore, it is easy to suppress a situation in which the passenger feels uncomfortable in the air conditioning operation due to the temperature difference between the blowout temperature of the center face blowout port and the blowout temperature of the side face blowout port.

The warm air tunnel 50 includes a wall portion 358 between the first outlet portion 56 and the second outlet portion 57. In other words, the first outlet portion 56 and the second outlet portion 57 are independent openings separated by the wall portion 358. Therefore, it is easy to prevent the warm air blown from the first outlet portion 56 and the warm air blown from the second outlet portion 57 from being mixed with each other and the hot air flowing in an unintended direction. Therefore, it is easy to direct an appropriate amount of warm air to the defroster opening 21 and the side face opening 31b.

Fourth Embodiment This embodiment is a modification based on the preceding embodiment as a basic form. In this embodiment, a warm air guide portion 459 for smoothly blowing hot air from the second outlet portion 57 is provided inside the warm air tunnel 50.

In FIG. 10, the warm air tunnel 50 includes a warm air guide portion 459 between the first outlet portion 56 and the second outlet portion 57. The warm air guide portion 459 is provided at a position including the end portion in the longitudinal direction of the tubular portion 51. The warm air guide portion 459 is a flat plate-shaped member. The warm air guide portion 459 projects from the inside of the tubular portion 51 toward the plate member 99. In other words, the warm air guide portion 459 projects in a direction intersecting the axial direction of the tubular portion 51. Therefore, the warm air guide portion 459 forcibly directs a part of the warm air flowing toward the first outlet portion 56 along the axial direction of the tubular portion 51 toward the second outlet portion 57. Of the warm air that flows through the tubular portion 51, the warm air that has come into contact with the warm air guide portion 459 is guided by the warm air guide portion 459 and its flow direction is changed. As a result, the direction in which a part of the hot air flows is changed from the direction toward the first outlet portion 56 to the direction toward the second outlet portion 57.

The warm air guide portion 459 is not continuous with the lower surface portion of the tubular portion 51. In other words, a space through which warm air can pass is formed between the lower end portion of the warm air guide portion 459 and the lower surface portion of the tubular portion 51. Therefore, part of the warm air is blown out from the first outlet portion 56 without being guided by the warm air guide portion 459. Therefore, by adjusting the size of the space between the lower end portion of the warm air guide portion 459 and the lower surface portion of the tubular portion 51, the warm air blown out from the first outlet portion 56 and the second outlet portion 57 can be adjusted. The ratio with the hot air blown out can be adjusted. That is, when it is desired to secure a large amount of warm air blown out from the second outlet portion 57, the size of the space between the lower end portion of the warm air guide portion 459 and the lower surface portion of the tubular portion 51 is reduced. .. This makes it possible to reduce the amount of warm air blown from the first outlet portion 56 and increase the amount of warm air blown from the second outlet portion 57.

According to the above-described embodiment, the warm air tunnel 50 includes the warm air guide portion 459 that guides the warm air toward the second outlet portion 57. Therefore, it is possible to adjust the ratio of the warm air blown from the first outlet portion 56 and the warm air blown from the second outlet portion 57. Therefore, it is easy to suppress the occurrence of an unintended temperature difference in the conditioned air by supplying the required amount of warm air to the required location. Further, the warm air guide portion 459 can guide the warm air in an appropriate blowing direction. Therefore, it is easy to suppress the situation where the warm air blown out from the second outlet 57 is not properly sucked into the face opening 31.

Other Embodiments The warm air tunnel 50 has second outlet portions 57 and 257 that blow warm air toward the center face opening 31a and second outlet portions 357 that blow warm air toward the side face opening 31b. Both may be provided. According to this, by appropriately adjusting the size and position of the second outlet portions 57, 257, 357, the amount and direction of the warm air blown out to the face opening portion 31 can be appropriately adjusted. In other words, by adjusting the second outlets 57, 257, 357, the temperature difference between the blowout temperature of the center face blowout port and the blowout temperature of the side face blowout port can be eliminated. Therefore, without changing the shape of the air conditioning case 2, it is possible to reduce the temperature difference of the conditioned air caused by the difference in the blowing position of the face outlet. The air conditioning case 2 is a larger component than the warm air tunnel 50. Therefore, eliminating the temperature difference by changing the shape of the warm air tunnel 50 instead of changing the shape of the air conditioning case 2 is very useful in improving the manufacturability of the vehicle air conditioner 1.

The disclosure in this specification and drawings is not limited to the illustrated embodiment. The disclosure encompasses the illustrated embodiments and variations on them based on them. For example, the disclosure is not limited to the combination of parts and/or elements shown in the embodiments. The disclosure can be implemented in various combinations. The disclosure may have additional parts that may be added to the embodiments. The disclosure includes omissions of parts and/or elements of the embodiments. The disclosure includes replacements or combinations of parts and/or elements between one embodiment and another. The disclosed technical scope is not limited to the description of the embodiments. It is to be understood that some technical scopes disclosed are shown by the description of the claims, and further include meanings equivalent to the description of the claims and all modifications within the scope.

Claims (8)

1. An air-conditioning case (2) in which the air-conditioning air flowing into the vehicle interior flows,
   A cooler (6) provided in the air conditioning case for cooling air to generate cold air;
   A heater (7, 8) provided in the air-conditioning case for heating air to generate warm air;
   A warm air tunnel (50) provided in the air-conditioning case, for guiding the warm air heated by the heater,
   The air conditioning case is
   A defroster opening (21) through which conditioned air for blowing out toward the front window flows,
   A center face opening (31a) through which conditioned air for blowing out toward the upper part of the front seat flows from the central part of the vehicle interior;
   A side face opening (31b) through which conditioned air for blowing out toward the upper part of the front seat flows from a side part in the vehicle interior,
   The warm air tunnel is
   A tubular portion (51) in which warm air heated by the heater flows,
   An inlet portion (52, 53) for sucking warm air into the tubular portion,
   A first outlet (56) for blowing warm air from the inside of the tubular portion toward the defroster opening;
   A vehicle air conditioner comprising: a second outlet (57, 257, 357) for blowing warm air from the inside of the tubular portion toward at least one of the center face opening and the side face opening.
2. The vehicle air conditioner according to claim 1, wherein the second outlet portion (57, 257) blows warm air toward at least the center face opening portion.
3. The vehicle air conditioner according to claim 1, wherein the second outlet portion (357) blows warm air toward at least the side face opening portion.
4. The entrance is
   An upstream inlet section (52),
   A downstream inlet portion (53) located downstream of the upstream inlet portion in the flow of warm air flowing inside the tubular portion,
   The tubular portion includes a merging portion (60) for merging the warm air sucked from the upstream inlet and the warm air sucked from the downstream inlet.
   The merging portion is upstream of at least a part of the first outlet portion and the second outlet portion in the flow of the warm air flowing inside the tubular portion, and is the first outlet portion rather than the first outlet portion. The vehicle air conditioner according to any one of claims 1 to 3, which is provided at a position close to the second outlet.
5. The tubular portion includes a bent portion (54) protruding toward the inside of the tubular portion,
   The bent portion is upstream of at least a part of the first outlet portion and the second outlet portion in the flow of the warm air flowing inside the tubular portion, and is the first outlet portion rather than the first outlet portion. The vehicle air conditioner according to any one of claims 1 to 4, which is provided at a position close to the second exit portion.
6. The vehicle air conditioner according to any one of claims 1 to 5, wherein an opening area of the second outlet portion is larger than an opening area of the first outlet portion.
7. The vehicle air conditioner according to any one of claims 1 to 6, wherein the first outlet portion and the second outlet portion are one opening that is continuous with each other.
8. The warm air tunnel is provided so as to project inside the tubular portion, and includes a warm air guide portion (459) for guiding the warm air toward the second outlet portion. The vehicle air conditioner according to any one of the above.

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