JP2004114889A - Air conditioner for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively use the whole body of a heater core 3 without causing an increase in the number of parts when a single air conditioning mode is selected for front seats in an air conditioner for an automobile capable of separately air-conditioning the front seats and rear seats. <P>SOLUTION: An evaporator 2 is disposed in the upstream of a casing 10 in a room unit 1, the heater core 3 is installed in the downstream, and a front seat bypass port 13, a front seat air mix part 14 and a front seat air mix door 4 are provided on one side. On the other side, a rear seat bypass passage 15, a rear seat air mix part 16 and a rear seat air mix door 5 are provided. A swollen part 19 is provided in the downstream of the heater core 3 to be distributed to a front seat heated air passage 34 and a rear seat heated air passage 35. A communication gap 20 is formed between the heater core 3 and the swollen part 19. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fully-automatic air conditioner (air conditioner) installed in a dashboard at a front portion (front) of a vehicle and capable of independent air conditioning of front and rear seats.
[0002]
[Prior art]
In a fully automatic air conditioner, an evaporator to which a refrigerant is supplied from a refrigerating device mounted on a vehicle is disposed upstream of a casing of an indoor unit. A switching box for switching between room air (inside air) and outside air and a blower are mounted upstream of the casing, and the conditioned air sucked into the casing by the blower passes through an evaporator and becomes cool air. Downstream of the evaporator, a heater core for circulating hot water (engine cooling water) is set, and the heater core is provided with an air mix door. The air mix door rotates according to the air conditioning conditions and adjusts the amount of conditioned air (warm air) passing through the heater core and the amount of cool air bypassing the heater core.
[0003]
The hot air that has passed through the heater core and the cool air that has flowed down the bypass are mixed in an air mixing section provided downstream of the heater core (downstream of the bypass), and have a temperature set by the driver. The mixed conditioned air is selectively supplied from the foot (heater) outlet, the upper body (ventilation) outlet, or the defroster outlet provided on the casing interior side (downstream side) of the casing according to the air conditioning condition. Is blown out.
[0004]
As shown in FIG. 2, in a front fully automatic air conditioner that independently performs air conditioning of a front seat and a rear seat of a vehicle compartment, in a casing 10 of an indoor unit 1, a front seat bypass port 13 is provided on one side of a heater core 3. A front seat air mix section 14 and a rear seat bypass path 15 and a rear seat air mix section 16 on the other side are provided independently of each other. In the conventional front fully automatic air conditioner, a partition plate 3A is provided on the downstream side of the heater core 3, and the upper side (one side) of the partition plate 3A is connected to the front seat hot air passage 34 to the front seat air mixing unit 14, and the lower side. The side (the other side) is a rear seat warm air passage 35 to the rear seat air mix section 16.
[0005]
[Problems to be solved by the invention]
When the air conditioning temperature of the front and rear seats is independently controlled by the conventional front fully automatic air conditioner, the cold air path (bypass), the hot air path, and the air mix section are completely separated by the front and rear seats. I have. In this case, when the single air conditioning mode (defroster mode) of the front seat is selected, only half of the heater core is used, so that the heating capacity is insufficient and the defrost performance may not be sufficiently satisfied in a cold region or the like. Occurs.
[0006]
To prevent this, a mode door with a movable partition that separates the heater core between the front seat and the rear seat is attached, and the distribution of warm air is adjusted to heat the front seat or rear seat according to usage conditions. There has been proposed a front fully automatic air conditioner that can selectively increase or decrease the number of air conditioners. However, this front fully automatic air conditioner requires a mode door and a link mechanism for operating the mode door. For this reason, there is a problem that the number of parts increases and the manufacturing cost increases, and at the same time, maintenance is troublesome.
[0007]
SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle air conditioner capable of independent air conditioning of a front seat and a rear seat, and effectively use the entire heater core when a single air conditioning mode of a front seat is selected without increasing the number of parts. Another object of the present invention is to provide a configuration capable of increasing the heating capacity.
[0008]
[Means for Solving the Problems]
According to the present invention, an evaporator to be supplied with a refrigerant from an in-vehicle refrigeration unit is arranged upstream of a casing of an indoor unit, and a heater core for circulating hot water is installed downstream of the evaporator. A bypass for the front seat, an air mixing unit for the front seat, and a front air mixing door for distributing cold air passing through the bypass for the front seat and cold air passing through the heater core, on one side of the heater core. A rear seat bypass, a rear seat air mix section, and a rear seat for adjusting the inflow ratio of cold air passing through the rear seat bypass and warm air passing through the heater core on the other side of the heater core. An air mixing door, downstream of the heater core, a front seat hot air path for supplying warm air passing through the heater core to the front seat air mixing section, and the rear seat air mixing section. In a vehicle air conditioner provided with a distribution means for distributing to a supplied rear hot air path, a communication gap for communicating the front seat hot air path and the rear seat hot air path is provided in the distribution means. .
[0009]
【The invention's effect】
According to the present invention, when the independent air conditioning mode (defroster mode) for the front seat is selected, the warm air flowing to the rear seat air mixing section through the gap communicating the front seat warm air passage and the rear seat warm air passage is used. It is supplied to the air mix section. For this reason, the entire heater core can be used effectively, and the heating capacity can be sufficiently ensured, so that the defrost performance can be sufficiently satisfied even in a cold region or the like. In addition, a movable mechanism such as a mode door in which the partition plate of the heater core is movable is not required, and problems such as an increase in cost due to an increase in the number of parts do not occur.
[0010]
The invention according to claim 2, wherein the distributing means is a bulging portion that bulges an inner wall surface of a casing of the indoor unit so as to be close to a center of a downstream side surface of the heater core, and the communication gap is: It is a gap between the tip of the bulging portion and the downstream side surface of the heater core. According to the present invention, the air conditioning of the front seat and the rear seat of the vehicle compartment can be independently performed with a simple configuration, and all of the heater cores can be effectively used when the single air conditioning mode of the front seat is selected.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention will be described with reference to the embodiment shown in the drawings. FIG. 1 shows a cross section of an indoor unit 1 of a front fully automatic air conditioner installed in a front part (in a dashboard) of a cabin of an automobile. The indoor unit 1 includes a casing 10 having an air-conditioned air duct inside, an evaporator 2 installed upstream (left side in the figure) of the casing 10 and circulating a refrigerant from a refrigerating device mounted on the vehicle, and a substantially central portion of the casing 10. And a heater core 3 installed in the section and through which hot water (such as engine cooling water) circulates.
[0012]
An inflow port 11 into which the conditioned air blown from a blower (not shown) flows is opened upstream of the evaporator 2. Downstream (right in the figure) of the evaporator 2, a deflecting wall 12 extending obliquely downward from the ceiling of the casing 10 is provided. Below the deflecting wall 12, there is provided a front seat bypass port 13 through which the cool air that has passed through the evaporator 2 flows around the heater core 3. Downstream of the front-seat bypass port 13 is a front-seat air mix section 14 in which cool air and hot air that has passed through the heater core 3 mix. The front seat air mix unit 14 is located at an upper portion of the casing 10 on the vehicle cabin side.
[0013]
The heater core 3 is provided below the front seat bypass port 13, and a rear seat bypass path 15 is provided below the heater core 3. Downstream of the rear-seat bypass 15, there is provided a rear-seat air mix section 16 in which the cool air that has passed through the rear-seat bypass 15 and the warm air that has passed through the heater core 3 are mixed. The rear-seat air mix section 16 is located at a lower portion of the casing 10 on the vehicle interior side, and is provided in a cylindrical case 17 in this embodiment.
[0014]
A hot air flow path 33 is provided between the downstream side surface 32 of the heater core 3 and the casing side wall 18 of the casing 10. The vehicle compartment side wall 18 is provided with a wedge-shaped cross-sectional bulging portion 19 bulging toward a substantially half position in the vertical direction of the downstream side surface 32. The hot air flow path 33 on the upper side of the bulging portion 19 supplies a hot air path 34 for supplying warm air to the air mixing section 14 for the front seat, and the lower side supplies hot air to the air mixing section 16 for the rear seat. A warm air path 35 for seats is provided.
[0015]
A communication gap 20 is formed between the downstream side surface 32 and the tip of the bulging portion 19. The shape of the bulging portion 19 and the width of the communication gap 20 are appropriately designed according to the capacity and use of the air conditioner so that the hot air can be reliably distributed and the air can be passed up and down smoothly. The bulging portion 19 may be formed by molding the casing 10 itself, or may be formed by installing another member.
[0016]
Near the upper end of the upstream side surface 31 of the heater core 3, an air mix door 4 for a front seat is installed. A rear-seat air mix door 5 is provided between the rear-seat bypass 15 and the rear-seat air mix section 16. The front-seat air mix door 4 rotates between the lower end of the deflecting wall 12 (the upper end of the front-seat bypass port 13) and the upper end of the entrance of the rear-seat bypass path 15, so that the cold air passing through the heater core 3 can be cooled. And cool air passing (bypassing) through the front seat bypass path 13.
[0017]
The casing 10 in the vicinity of the front seat air mix section 14 is provided with a defroster outlet 42, an upper body (ventilation) outlet 41, and a foot (heater) outlet 43. Opening / closing doors 44 to 46 are attached to the outlets 41 to 43, respectively. The cylindrical case 17 of the rear-seat air mix section 16 is provided with an upper body outlet 47 and a foot outlet 48 for the rear seat, and a switching door 49 is provided inside.
[0018]
The operation of this automotive air conditioner will be described. When the single air conditioning mode for the front seat and the defroster mode are selected, the air mix door 4 for the front seat and the air mix door 5 for the rear seat are set at the positions indicated by the two-dot chain line in FIGS. As a result, all of the conditioned air passes through the heater core 3 and is supplied to the front seat air mixing section 14 that has passed through the communication gap 20.
[0019]
In the simultaneous air-conditioning mode of the front seat and the rear seat, the warm air that has passed through the heater core 3 bulges toward a substantially half position of the downstream side surface 32 in the vertical direction, and has a wedge-shaped cross-sectional end portion 19. , And is divided into a front-side air mix section 14 and a rear-seat air mix section 16 through a front-seat hot air path 34 and a rear side through a rear-seat hot air path 35.
[0020]
Therefore, the heating capacity is sufficient, and the defrost performance can be sufficiently satisfied in a cold region or the like. In addition, the air conditioning of the front seat and the rear seat of the vehicle compartment can be independently performed by a simple configuration in which the casing side wall 18 is formed by bulging and the entire heater core is provided when the single air conditioning mode of the front seat is selected. Can be used, the heating capacity is sufficient, and the defrosting performance can be sufficiently satisfied in a cold region or the like, so that an increase in the number of parts and an increase in the number of maintenance steps can be prevented.
[Brief description of the drawings]
FIG. 1 is a sectional view of an indoor unit of an air conditioner for a vehicle according to the present invention.
FIG. 2 is a sectional view of an indoor unit of a conventional automotive air conditioner.
[Explanation of symbols]
1 indoor unit 10 casing 13 bypass seat for front seat (bypass for front seat)
14 Air mix section for front seat 15 Bypass path for rear seat (bypass for rear seat)
16 Air mix section for rear seat 19 Expansion section 2 Evaporator 3 Heater core 4 Air mix door for front seat 5 Air mix door for rear seat 20 Communication gap 32 Downstream side surface 34 Hot air path for front seat (front air path for front seat)
35 Hot air path for rear seats (hot air path for rear seats)

Claims (2)

Installed in the front of the cabin of the car, an evaporator to which a refrigerant is supplied from an onboard refrigerating device is arranged on the upstream side in the casing of the indoor unit, and a heater core for circulating hot water is installed downstream of the evaporator,
On one side of the heater core, a front seat bypass, a front seat air mix section, and a front seat air mix door for distributing cold air passing through the front seat bypass and cold air passing through the heater core are provided,
On the other side of the heater core, a rear-seat bypass, a rear-seat air mix section, and a rear-seat air mix that adjusts an inflow ratio of cold air that has passed through the rear-seat bypass and warm air that has passed through the heater core. A door,
Downstream of the heater core, hot air that has passed through the heater core is distributed to a front seat hot air path that supplies the front seat air mix section and a rear seat hot air path that supplies the rear seat air mix section. In a vehicle air conditioner provided with a distribution means,
An air conditioner for an automobile, wherein a communication gap is provided in the distribution means for communicating a front seat hot air path and a rear seat hot air path. 2. The vehicle air conditioner according to claim 1, wherein the distribution unit is a bulging portion that bulges an inner wall surface of a casing of the indoor unit so as to be close to a vicinity of a center of a downstream side surface of the heater core. 3. The gap is a gap between a tip of the bulging portion and a downstream side surface of the heater core.

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