JPH07324Y2 - Automotive air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an air conditioner for a vehicle capable of individually air-conditioning a front seat side space portion and a rear seat side space portion, Especially, it relates to the one with improved temperature control performance in the rear seat side space.

[Prior Art] An air conditioner for a vehicle is well known in which a front seat side space portion and a rear seat side space portion of the vehicle can be individually air-conditioned.

As such a conventional device, for example, as shown in FIG. 2, a main duct 33 is connected to a downstream side of an air introducing section 32 provided with an inside / outside air switching door 31, and an inside of the main duct 33 is connected to an upstream side. In order from, a blower 34, a cooling heat exchanger 35,
An air mix door 36 and a heating heat exchanger 37 are provided, while a defroster air outlet passage 41, a vent air outlet passage 42, and a heat air outlet passage 43 are connected near the downstream end of the main duct 33. In the configuration, a rear seat air outlet passage 45 that guides air to the rear seat side space portion is provided with a branch portion 46.
On the upstream side, the first branch air passage 47 and the second branch air passage 48
And the upstream end of the first branch air passage 47 is connected to the main duct 33 at a position downstream of the cooling heat exchanger 35 and upstream of the heating heat exchanger 37, and the second branch air passage is formed.
It has been proposed that the upstream end of 48 is connected to the heat air outlet passage 43. In this prior art, a blower 49 is provided in the rear seat air outlet passage 45 in order to blow out sufficient air into the rear seat side space.

Further, as shown in FIG. 3, in the case where the main duct 33 having substantially the same basic structure as that of FIG. 2 is provided, the main duct is located at a position downstream of the cooling heat exchanger 35 and upstream of the heating heat exchanger 37. Rear cold air outlet 51 connected to 33
It has been proposed that a rear seat warm air blowing passage 52 connected to the heat air blowing passage 43 be individually provided. The members corresponding to the respective members of the air conditioner shown in FIG. 2 are given the same numbers as in FIG.

However, in the conventional one shown in FIG. 2 and FIG. 3, the warm air after the temperature is adjusted by the air mix door is supplied to the rear seat space portion, so that the rear seat side The temperature of the warm air supplied to the seats is affected by the air conditioning mode or the set temperature set for the front seat side. Therefore, every time the air conditioning conditions on the front seat side change, the air conditioning state on the rear seat side changes, There was a problem that the air conditioning feeling of the passengers on the rear seats deteriorated.

Therefore, for example, as shown in FIG. 4, a rear seat air outlet passage 45 for guiding air to the rear seat side space portion is provided with a first branch air passage 47 and a second branch air passage 48 upstream of the branch portion 46. And the upstream end of the first branch air passage 47 is connected to the main duct 33 at a position downstream of the cooling heat exchanger 35 and upstream of the heating heat exchanger 37, while it is connected to the second branch air passage.
The upstream end of 48 is connected to the main duct 33 immediately downstream of the heating heat exchanger 37, and the temperature of the warm air introduced into the rear seat air passage 45 is affected by the air conditioning conditions on the front seat side. It has been proposed to try to prevent the above phenomenon as much as possible (see, for example, JP-A-61-257312). The second
The members corresponding to the respective members of the air conditioner shown in the figure are denoted by the same reference numerals as in FIG.

However, in this conventional one, the air that has not passed through the heating heat exchanger 37 from immediately downstream of the heating heat exchanger 37 has begun to be mixed into the air that has passed through the heating heat exchanger 37. Since the mixed temperature is introduced into the second branch air passage 48, there is a problem that the influence on the air conditioning conditions on the front seat side cannot be completely eliminated.

Further, in the air conditioner in which the air mix door is provided only on the upstream side of the heating heat exchanger 37 as shown in FIG. 4, the air intake of the heating heat exchanger is completely closed by the air mix door. Also, since the air flows in and out from the air outlet side of the heating heat exchanger 37 to raise the temperature of the air, when the air is not heated, the supply of the hot water for heating the air to the heating heat exchanger 37 is stopped. Although a water valve is required, there is a problem that the water valve easily causes water leakage.

Therefore, in the conventional air conditioner shown in FIG. 4, it is not possible to sufficiently prevent a change in the air conditioning state on the rear seat side due to a change in the air conditioning condition on the front seat side, and water leakage from the water valve occurs. There was a problem that it happened easily.

[Problems to be Solved by the Present Invention] The present invention has been made in view of the above-mentioned conventional problems, and is not affected by air conditioning conditions such as an air conditioning setting mode or a set temperature on the front seat side. An object of the present invention is to provide an automobile air conditioner capable of maintaining the air-conditioned state of the rear seat side space portion in a desired and comfortable state.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a heat exchanger for cooling,
A heating heat exchanger arranged downstream of the cooling heat exchanger in the direction of air flow and supplied with hot water without passing through a water valve, and a heating heat exchanger arranged upstream of the heating heat exchanger. A main air mix door that controls the air distribution to the heat exchanger, and a sub air mix door that is arranged on the downstream side of the heating heat exchanger and that controls the air distribution to the heating heat exchanger. While it is installed in the main duct, the upstream side is
It is branched into two first and second air passages and is connected to the main duct at a position where the upstream end of the first air passage is located downstream of the cooling heat exchanger and upstream of the heating heat exchanger. The upstream end of the air passage is connected to the main duct at a position downstream of the heating heat exchanger and upstream of the sub air mix door, and the first and second air passages are merged on the downstream side, and the downstream side thereof is joined. Rear seat air blowing passages whose ends open to the rear seat side space portion and supply conditioned air to the rear seat side space portion, and first and second air passages for opening and closing the first and second air passages, respectively. There is provided an opening / closing door of the air conditioner.

[Operation] According to the present invention, by setting the sub air mix door at a predetermined position, the air that has not passed through the heating heat exchanger is provided between the heating heat exchanger and the sub air mix door. It is possible to define a small space part that is appropriately partitioned from the main space part in the main duct in which the air flows, and the air that has not passed through the heating heat exchanger is mixed into the small space part. do not do. The upstream end of the rear seat air outlet passage for introducing warm air is connected to the small space defined between the heat exchanger for heating and the sub air mix door. The hot air introduced into the air blowing passage for air is formed only by the air that has passed through the heating heat exchanger, so that the temperature of the hot air becomes substantially constant depending on the hot water for heating the air. Therefore, even if the air conditioning conditions on the front seat side change, the temperature of the hot air introduced to the rear seat side does not change. Therefore, by adjusting the opening of the first and second opening / closing doors, The air conditioning state on the rear seat side can be set to a desired state without being affected by the air conditioning conditions of No. 1, and a good air conditioning feeling can be obtained.

In addition, the sub air mix door completely shuts off the air outlet of the heating heat exchanger from the main space in the main duct where the air that did not pass through the heating heat exchanger flows. Since it is possible to prevent the air from entering and exiting from the air outlet of the exchanger, it is possible to effectively prevent the heat transfer from the heating heat exchanger to the air even when the hot water for heating the air is kept flowing. Further, since the water valve is not provided in the hot water supply passage to the heating heat exchanger, water leakage from the supply passage is effectively prevented.

[Examples] Examples of the present invention will be specifically described below.

As shown in FIG. 1, an air conditioner AC for a vehicle basically has a blower unit A that blows air, a heat exchange unit B that heats or cools the air according to a selected air conditioning mode, and an air blower. The air distribution unit C distributes air to a predetermined part of the company.

The blower unit A is substantially disposed in the vicinity of the front end portion of the main duct 1 and an air introducing duct 2 arranged in the air introducing duct 2 to introduce outside air into the air conditioner AC.
Alternatively, it is composed of an inside / outside air switching door 3 for switching whether to introduce air (inside air) inside the vehicle, and a blower 4 arranged inside the main duct 1.

A refrigerator (not shown) is provided at the most upstream side of the heat exchange section B.
When the cooling mode is selected, the cooling heat exchanger 5 for cooling the air can cool all the air flowing in the main duct 1 and the air flowing direction of the main duct 1. While it is arranged over almost the entire area of the vertical air flow cross section (hereinafter, simply referred to as the main duct cross section), it is located slightly downstream of the cooling heat exchanger 5 during heating such as in heat mode or bilevel mode. In the radiator type heating heat exchanger 6 for heating air using hot water, the right half portion of the cross-section of the main duct (the lower side in FIG. 1) is seen from the upper side of the air conditioner AC in the air flow direction. ).

Then, immediately upstream of the heating heat exchanger 6 (air intake side), a main air mix door 7 for adjusting the ratio of the air sent to the heating heat exchanger 6 in the air flowing in the main duct 1. Is provided. When the main air mix door 7 is set to the position indicated by X, the portion where the heating heat exchanger 6 is not arranged is closed in the cross section of the main duct, so that almost all the air is heated. When the main air mix door 7 is set to the position indicated by Y, the air intake of the heating heat exchanger 6 is almost completely closed. Most of the air flows in the cross section of the main duct where the heating heat exchanger 5 is not arranged, and the temperature of the air hardly rises. Then, the temperature of the air can be adjusted by setting the main air mix door 7 at an arbitrary position between X and Y.

However, even when the main air mix door 7 is set to the position indicated by Y and the air intake of the heating heat exchanger 6 is closed, the air flows in and out from the air outlet of the heating heat exchanger 6. Since this is heated, in order to prevent this, the sub air mix door 8 is arranged at a predetermined position on the downstream side (air outlet side) of the heating heat exchanger 6. The sub-air mixing door 8 has substantially no effect when set to the position indicated by P, but when set to the position indicated by Q, it is located downstream of the heating heat exchanger 6 (air outlet). The small space portion 9 (on the side) is partitioned by the sub air mix door 8 from the main space portion 10 downstream of the heating heat exchanger 6 in the main connector 1, and the air in the main space portion 10 is heated by the sub air mix door 8. The sub air mix door 7 is set at an arbitrary position between P and Q to adjust the degree of communication between the small space portion 9 and the main space portion 10. You can do it. Therefore, by setting the main air mix door 7 at the position indicated by Y and the sub air mix door 8 at the position indicated by Q, the air flowing through the heating heat exchanger 6 into the main duct 1 is changed. Since the heat transfer can be almost completely shut off, it is not necessary to provide a water valve, and water leakage does not occur unlike the conventional air conditioner having a water valve.

Then, in the air distribution unit C provided downstream of the heat exchanger B,
A defroster air blow passage 11 for passing air blown toward the windshield (not shown), and a vent air blow passage 12 for passing vent air blown toward the upper half of the front passenger.
A heat air blowing passage 13 through which air blown toward the lower half of the front passenger is connected. In the vicinity of the connection of the defroster air outlet passage 11, the vent air outlet passage 12, and the heat air outlet passage 13 to the air distribution portion C, the defroster air outlet passages for opening and closing the respective outlet passages 11, 12, 13 are opened and closed, respectively. A door 14, a vent air outlet passage opening / closing door 15, and a heat air outlet passage opening / closing door 16 are provided.

By the way, a rear seat air conditioning system D is provided in order to perform air conditioning of the rear seat side space portion, which will be described below.

The rear seat air outlet passage 18 whose downstream end is open to the rear seat side space portion has a main duct at a position downstream of the cooling heat exchanger 5 and upstream of the heating heat exchanger 6 on the upstream side of the branch portion 19. 1 is connected to the first branch air outlet passage 21 and a second branch air outlet passage 22 connected to the main duct 1 at a position downstream of the heating heat exchanger 6 and upstream of the sub air mix door 8. ing. The openings of the first branch air outlet passage 21 and the second branch air outlet passage 22 to the main duct 1 are respectively provided with a first branch air outlet passage opening / closing door 23 and a second branch air outlet passage opening / closing door 23 for opening and closing these openings. An air outlet passage opening / closing door 24 is provided.

A blower 25 is provided in the rear seat air outlet passage 18 so that a sufficient amount of air can be blown to the rear seat side space portion, but the first and second branch air outlet passages 21, 22 are provided. Alternatively, when the flow resistance of the rear seat air blowing passage 18 is small, the blower 25 may be omitted because a sufficient amount of air can be supplied to the rear seat side only by the blower 4. The operation unit of the rear seat side air conditioner may be provided on the front seat side or the rear seat side.
Alternatively, a solar radiation sensor may be provided for automatic operation.

The operation of the air conditioner AC will be described below for typical air conditioning modes.

(Front seat side) In the vent mode, the main air mix door 7
Is set to the Y position, the sub air mix door 8 is set to the Q position, the vent air blowing passage opening / closing door 15 is opened, and the defroster air blowing passage opening / closing door 14 and the heat air blowing passage opening / closing door 16 are closed. The inside / outside air switching door 3 is set on the outside air introduction side. At this time, the vent air blowing passage 12
Vent air (outside air) toward the upper body of the front passenger
Is blown out.

In heat mode, main air mix door 7
Is set to an appropriate position between X and Y according to the desired air temperature, the sub air mix door 8 is set to the P position, the heat air outlet passage opening / closing door 16 is opened, and the defroster air outlet passage opening / closing door 14 and Vent air outlet passage opening / closing door
Close 15 and. Although the inside / outside air switching door 3 is set on the inside air introduction side, it may be set on the outside air introduction side. At this time, heat air (warm air) is blown out toward the lower body of the front seat occupant through the heat air blowing passage 13.

In the defrost mode, the main air mix door 7 is set to an appropriate position between X and Y, the sub air mix door 8 is set to the P position, and the sub air mix door 8 is set according to the desired air temperature. The defroster air outlet passage opening / closing door 14 is opened and the vent air outlet passage opening / closing door 15 and the heat air outlet passage opening / closing door 16 are closed. Although the inside / outside air switching door 3 is set on the outside air introduction side, it may be set on the inside air introduction side. At this time, heat air (warm air) is blown out toward the windshield through the defroster air blowing passage 11.

In the vibel mode, the main air mix door 7 is set so as to be parallel to the air flow direction at a substantially intermediate position between X and Y, the sub air mix door 8 is set to the P position, and the vent air outlet passage is set. The opening / closing door 15 and the heat air outlet passage opening / closing door 16 are opened, and the defroster air outlet passage opening / closing door 14 is closed. The inside / outside air switching door 3 is set on the outside air introduction side. At this time, the vent air blowing passage 12
Vent air (outside air) is blown toward the upper half of the body of the front seat occupant, and heat air (warm air) is blown toward the lower half of the body of the front seat occupant through the heat air blowing passage 13.

In the cooling mode, the main air mix door 7 is set to the Y position, the sub air mix door 8 is set to the Q position, the vent air blowing passage opening / closing door 15 is opened, and the defroster air blowing passage opening / closing door 14 and the heat air blowing passage are opened. The opening / closing door 16 is closed, the inside / outside air switching door 3 is set to the inside air introduction side, and frozen air (not shown) is operated. At this time, the cool air is blown out toward the upper half of the body of the front seat occupant through the vent air blowing passage 12.

(Rear Seat Part) During the vent mode and during cooling, the first branch air outlet passage opening / closing door 23 is opened and the second branch air outlet passage opening / closing door 24 is closed. At this time, vent air or cold air is blown out toward the rear seat occupant through the rear seat air outlet passage 18.

During heating, the first branch air outlet passage opening / closing door 23 and the second branch air outlet passage opening / closing door 24 are adjusted to a predetermined opening degree and opened according to the desired air temperature. At this time, a desired temperature of hot air is blown toward the rear seat occupant through the rear seat air blowing passage 18.

[Advantages of the Invention] As described above, according to the present invention, the air of an appropriate temperature is blown to the rear seat space without being affected by the air conditioning conditions such as the air conditioning setting mode on the front seat side and the set temperature. As a result, the air conditioning feeling in the rear seat space is improved.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of an automobile air conditioner showing an embodiment of the present invention. FIG. 2 is a system configuration diagram of a conventional automobile air conditioner, and FIG. 3 and FIG. AC: Automotive air conditioner, D: Rear seat air conditioning system, 1 ...
... Main duct, 4 ... Blower, 5 ... Cooling heat exchanger, 6 ... Heating heat exchanger, 7 ... Main air mix door, 8 ... Sub air mix door, 18 ... Rear seat air Blow-off passage, 19 ... Branch part, 21 ... First branch air blow passage, 22 ... Second branch air blow passage, 23 ... First branch air blow passage opening / closing door, 24 ... Second branch air blow passage Opening and closing door.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Yoshida 5658 Yoshikawa, Hachimotomatsu-cho, Higashi-Hiroshima City, Hiroshima Pref. Japan Climate Systems Co., Ltd. (56) Reference JP-A-62-160910 (JP, A) JP 60-166511 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A cooling heat exchanger, a heating heat exchanger arranged downstream of the cooling heat exchanger in the direction of air flow, to which hot water is supplied without a water valve, and the heating. Main air mix door that is arranged upstream of the heat exchanger for heating and controls air distribution to the heat exchanger for heating, and air to the heat exchanger for heating that is arranged downstream of the heat exchanger for heating. A sub air mix door that controls the air distribution of the air is installed in the main duct, while the upstream side is branched into two air passages, the first and second air passages, and the upstream end of the first air passage is the heat exchange for cooling. Is connected to the main duct at a position downstream of the heat exchanger and upstream of the heat exchanger for heating, and the upstream end of the second air passage is connected to the main duct at a position downstream of the heat exchanger for heating and upstream of the sub air mix door. And the first and second air communication Are merged on the downstream side, the downstream side ends thereof open into the rear seat side space portion and the rear seat air blowing passages for supplying conditioned air to the rear seat side space portion, and the first and second air passages, respectively. An air conditioner for a vehicle, comprising: a first and a second opening / closing door for opening and closing an air passage.