JPH0558144A - Car air conditioner and its duct casing - Google Patents

Abstract

PURPOSE:To suppress the costs by using common components to a car air- conditioner of standard temp. regulation type, another one of left-right independent temp. regulation type, and a third one of front-rear independent temp. regulation type. CONSTITUTION:The duct casing of an air-conditioner for car is partitioned into three segments parallelly in the direction along the air stream. The segments 1a, 1c on both sides are prepared as commonly used to any air- conditioner of standard temp. regulation type, of left-right independent temp. regulation type, and of front-rear independent temp. regulation type, while the central casing segment shall be solely dedicated to the type which is applicable in the current case. Thus air-conditioners of different types are assembled from these components. The central segment in the case of left-right independent type is so structured that a partition plate in the direction of air stream is installed in the middle to partition a left and a right passage, and in the case of front-rear independent type, 1b'', so that three passages are partitioned by furnishing partition plates 9b, 9c on both sides, and further in the case of standard type, no partition plate shall be provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile air conditioner, and more particularly to an automobile air conditioner which is suitable for sharing parts of an air conditioner for each function such as left and right independent temperature control functions and rear seat independent temperature control functions. The present invention relates to an air conditioner and its duct casing.

[0002]

2. Description of the Related Art The functions of an air conditioner mounted on an automobile include a normal temperature control function, a left and right independent temperature control function, and a rear seat independent temperature control function. Various air conditioners must be assembled for each vehicle type in which the air conditioner is mounted, or according to user's wishes. Japanese Unexamined Patent Publication No. 57-167819 describes an air conditioner that divides the passenger compartment into three zones, which are the front seat right, the front seat left, and the rear seat, and can perform air conditioning in each zone.

[0003]

SUMMARY OF THE INVENTION The above-mentioned prior art is
The air conditioner with left and right independent temperature control functions is manufactured by assembling dedicated parts made for that function, and the air conditioner with rear seat independent temperature control function is manufactured exclusively for that function. It is designed to assemble and manufacture parts. For this reason, the manufacturer of the air conditioner has to prepare dedicated parts for each function, which is costly and requires a stock of various parts.

An object of the present invention is to provide an automobile air conditioner and a duct casing for the same, which can share the parts of the air conditioner having various functions and can reduce the cost.

[0005]

The above object is to divide a duct casing of an air conditioner for an automobile into three parts in parallel with an air flow, use partial duct casings on both sides as common parts, and use a standard duct as a central duct casing. By using temperature control type, left and right independent temperature control type, front and rear independent temperature control type, by configuring each temperature control type air conditioner,
To be achieved.

[0006]

[Function] Of the duct casings, the duct casings on both sides divided into three parts are used as common parts for each temperature control type, and only the central duct casing is dedicated to each temperature control type, so that 2/3 or more parts are used. , An inexpensive and highly reliable air conditioner can be manufactured, and development man-hours can be shortened.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of an automobile air conditioner according to an embodiment of the present invention, which is a standard temperature control type automobile air conditioner using common parts. 2 is shown in FIG.
It is sectional drawing which cut | disconnected the air conditioning apparatus for motor vehicles shown in FIG.

Reference numeral 1 is a duct casing that incorporates the respective components of the air conditioner. This duct casing 1 is
As shown in FIG. 1, three partial casings 1a, 1b, 1c are arranged in parallel in the air flow direction, and each partial casing 1
The clamp tool 30 shown in FIG. 4 is between a, 1b and 1b, 1c.
It is configured as shown in FIG. 3 by being integrally connected with. As shown in FIG. 2, a blower motor 2, an evaporator 3 and a heater core 4 are mounted on the duct casing 1 in order in the direction of air flow. An intake box 2c is attached to the opposing portion of the blower motor 2.
The intake box 2c is provided with an air inlet 2a opening to the inside of the vehicle and an air inlet 2b opening to the outside of the vehicle.
The communication with the blower motor 2 is controlled by the intake door 5.

An air mix door 6 is arranged on the evaporator 3 side of the heater core 4 and is shielded by the air mix door 6.
The ratio of the cold air bypassing the taco core 4 and the hot air passing through the air mix door 6 and the heater core 4 is adjusted by the opening degree of the air mix door 6 to adjust the temperature of the air blown into the vehicle.

FIG. 5 is a block diagram of a vehicle air conditioner of the left and right independent temperature control system assembled by using common parts according to an embodiment of the present invention. Partial duct casings 1a, 1c
Is the same as the partial duct casings 1a and 1c in FIG. 1, but the partial duct casings used in the middle of them are used.
The difference is that only the single 1b is used for left and right independent temperature control. That is, a dedicated duct casing 1b 'for the left and right independent temperature control air conditioners is provided with a partition plate 9a at the center, and the partition plate 9a and the partial casing 1a form a right temperature control passage. The partition plate 9a and the partial casing 1c form a left temperature control passage. Air temperature control air mix door 6a for each of the left and right temperature control passages,
A left temperature control air mix door 6c is provided. The cross section of each temperature control passage is the same as in FIG.

FIG. 6 is a block diagram of an automobile air conditioner having left and right independent temperature control and rear seat independent temperature control functions assembled by using common parts according to an embodiment of the present invention. Similar to the air conditioners of FIGS. 1 and 5, this air conditioner uses the same common partial casings 1a and 1c, and only the central partial casing 1b "is used for rear seat independent temperature control. In this embodiment, partition plates 9 are provided on both sides of the partial casing 1b "so that the partial casings 1a, 1b" and 1c form three separate temperature control passages.
b and 9c are provided. The air mix doors 6a, 6b, 6c are attached to the respective temperature control passages. The cross-sections of the partial casings 1a and 1c are the same as those in FIG. 2, and the cross-section of the partial casing 1b ″ has the device configuration shown in FIG. 7. In this FIG. 7, 8b is a defroster door and 10 is That is, the rear seat blowing door, that is, the air conditioned by the air mix door 6b is blown out by opening the rear seat blowing door 10 so that the temperature-controlled air is blown to the rear seat.
In the defroster mode, the rear seat blowing door 10 is closed and the defroster door 8b is opened to supply the entire air conditioning capacity for the defroster. The mode door 11 is for selecting an outlet depending on the temperature of the blown air.

Next, a vehicle air conditioner control device according to an embodiment of the present invention will be described. FIG. 8 is a block diagram of a control device for controlling the air conditioner for a vehicle according to the embodiment of the present invention. Reference numeral 12 is a single-chip microcomputer for executing digital arithmetic processing of software according to a predetermined control program, to which a crystal oscillator 13 having an oscillation frequency of several megahertz is connected, and which is supplied with power from an on-vehicle battery (not shown). Works. The microcomputer 12 includes a ROM that stores an automatic control program in which a calculation procedure is predetermined, a central processing unit (CPU) that executes the automatic control program sequentially read from the ROM, and an oscillation signal of the crystal oscillator 13. A clock generator that generates a reference clock pulse for various calculations based on the
O) It is composed of a one-chip large-scale integrated circuit (LSI) having a circuit portion as a main constituent portion.

First, the control of the standard air conditioner shown in FIG. 1 will be described. An outside air sensor 14, an in-vehicle sensor 15, a solar radiation sensor 16, and an outlet temperature sensor 17 are connected to the microcomputer 12 through an A / D converter 18, and detection signals of these sensors are digital signals. Is converted into and input. Further, a temperature setting device 19, a mode setting device 20, and an air volume setting device 21 are connected to the microcomputer 12, and these setting signals are inputted as digital signals.

The micro computer 12 processes various calculations and determinations based on the detection signals of the respective sensors and the respective setting signals described above, and the blower motor 2, the intake door 5, the air mix door 6, the warm air. It generates various signals for controlling the closing door 7, the differential vent door 8 and the floor door 9. The intake door 5 is driven by an actuator 22, the air mix door 6 and the hot air closing door 7 are driven by an actuator 23, and the differential vent door 8 and the floor door 9 are linked by an actuator 24 by a link mechanism 25.
Driven through. The blower motor 2 is driven by the drive circuit 26.

The actuator 22 is a micro computer.
The inside / outside air is switched by receiving the inside / outside air command signal from the controller 12 and operating the intake door 5.
The actuator 23 receives a command signal for opening control from the microcomputer 12 and latches it, and adjusts the opening of the air mix door 6 and the hot air closing door 7 according to the command signal to control the blowout temperature. Control. The actuator 24 receives the opening command signal from the microcomputer 12 and latches it, and the link mechanism 25 operates the outlet switching doors 8 and 9 to select the conditioned air outlet.
The drive circuit 26 continuously controls the rotation speed of the blower motor 2 in response to a command signal from the microcomputer 12. The operation of the air conditioner having the above configuration is already known from, for example, Japanese Patent Publication No. 63-37727, and the description thereof is omitted here. 1 and 2, the hot water control system connected to the heater core 4 and the refrigeration cycle system connected to the evaporator 3 are not necessary for explaining the configuration of the present embodiment, and therefore are not shown. I am doing it.

Next, an embodiment of the control method of the above-mentioned air conditioner will be described. FIG. 9 is a flowchart showing the processing procedure of the automatic control routine. This control process is performed by the microcomputer 12. Incidentally, this flow chart shows only the blown air temperature control according to the main points of the embodiment of the present invention, and other control functions can be referred to the publicly known documents mentioned above, so that they are omitted here.

Now, when the microcomputer 12 enters the operating state, the processing of the air conditioning control program shown in FIG. 9 (FIG. 9) is executed at a cycle of several hundred msec. First, step 1
At 01, the signal Ta from the outside air sensor 14, the signal Tr from the in-vehicle sensor 15, and the signal Z from the solar radiation sensor 16
m, the signal Td from the outlet temperature sensor 17, the temperature setting signal Ts from the temperature setting device 19, the outlet switching signal M from the mode setting device 20, and the air volume setting signal Q from the air volume setting device 21. Then, the process proceeds to step 102. Step 10
The blowout mode is determined based on the data input in the processing of 1. In this determination, if the setting signal M from the mode setting device 20 indicates the manual mode designation,
An opening command signal is sent to the actuator 24 so that the designated mode is reached, and a conditioned air outlet is selected. If the setting signal M is in the auto mode, the blowout mode is selected based on the signal Ta from the outside air sensor 14 as shown in FIG. That is, the bent mode is selected in the summer when the outside temperature is high, the heater mode is selected in the winter when the outside temperature is low, and the bilevel mode is selected in the intermediate period such as spring and autumn.

Next, at step 103, the target blowout temperature of the vent blowout air temperature is calculated. The calculation is performed by, for example, the signal Ta from the outside air sensor 14 and the signal Zm from the solar radiation sensor 16.
Is performed by the method shown in FIG. The target blowout temperature in FIG. 11 is a case where the temperature is set to 25 ° C. by the temperature setting device 19, and the target blowout temperature moves in parallel up and down according to the change in the set temperature. Finally, in step 104, the blown air volume is calculated by the set signal Q from the air volume setter 21, and the air volume is controlled according to FIG.

Here, the description of the same parts as those of the standard air conditioner will be omitted, and only the control method peculiar to the left and right independent temperature control air conditioners will be described. FIG. 13 is a configuration diagram of a control device for the left and right independent temperature control air conditioners. The right temperature adjusting air mix door 6a and the warm air closing door 7a are driven by the actuator 23a, and the left temperature adjusting air mix door 6c and the warm air closing door 7c are driven by the actuator 23c. And actuators 23a, 23c
Receives and latches respective opening control command signals from the microcomputer 12, and according to the opening control command signals, the air mix doors 6a and 6c and the hot air closing doors 7a and 7a.
The left and right outlet temperatures are independently controlled by adjusting the opening degree of c. For controlling the outlet temperature, outlet temperature sensors 17a and 17c are installed near the outlets of the right and left temperature control passages, respectively, and the outlet temperatures of the right and left temperature setters 22a and 22c are set.
The feedback control is performed so that the target blowout temperature set in step 3 is reached.

Next, the control of the air conditioner in which the rear seat independent temperature control function is added to the left and right independent temperature control will be described. It should be noted that the description of the portions that overlap with the standard type and the left and right independent temperature control air conditioners is omitted, and only the control method peculiar to the rear seat temperature control air conditioner will be described. FIG. 14: is a block diagram of the control apparatus for rear seat independent temperature control air conditioners. The air mix door 6b for rear seat temperature control and the hot air closing door 7b are the actuator 2.
It is driven by 3b. And the actuator 23b
Receives and latches an opening control command signal from the microcomputer 12, and adjusts the opening of the air mix door 6c and the warm air closing door 7c in accordance with the opening control command signal to adjust the opening of the rear seat. Independently control the outlet temperature. The blowout temperature is controlled by providing a blowout temperature sensor 17b in the vicinity of the rear seat outlet and performing feedback control so that the blowout temperature becomes the target blowout temperature set by the rear seat temperature setting device 22c. Further, the actuator 27 operates the air outlet switching door 11,
The outlet is switched depending on the temperature of the outlet. When the defroster mode is set by the air outlet switching setting device for the front seat, the defroster door 8c is opened and the rear seat switching door 10 is closed.
This causes the full capacity of the air conditioner to act on the defroster function.

According to the above-described embodiment, the air conditioning apparatus for each temperature control function can be constructed by changing the function-specific duct casings 1b, 1b ', 1b ", so that the parts can be commonly used. As a result, it becomes possible to assemble a vehicle air conditioner at a low cost with a high rate, a low cost, a high reliability, and a temperature control function desired by the user.

[0022]

According to the present invention, since the sharing ratio of the parts of the air conditioner for each function is increased, the manufacturing cost of the air conditioner for each function can be reduced and the air conditioner can be adjusted to the user's preference. Another advantage is that an automobile air conditioner can be assembled. Further, even if the temperature control function of the vehicle air conditioner changes, the basic structure of the air conditioner is the same, so the basic performance such as temperature control is the same, and the development man-hour can be shortened.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an automobile air conditioner having a standard temperature control function to which an embodiment of the present invention is applied.

2 is a cross-sectional view taken along the air flow of FIG.

FIG. 3 is a top view of the automobile air conditioner having the standard temperature control function shown in FIG.

FIG. 4 is an enlarged cross-sectional view of a connection portion of a partial casing.

FIG. 5 is a configuration diagram of a vehicle air conditioner having left and right independent temperature control functions to which an embodiment of the present invention is applied.

FIG. 6 is a configuration diagram of an automobile air conditioner having left and right independent temperature control functions and a rear seat independent temperature control function to which an embodiment of the present invention is applied.

7 is a cross-sectional view taken along the air flow in the center of the automobile air conditioner shown in FIG.

FIG. 8 is a configuration diagram of a control device of an air conditioner for a vehicle having a standard temperature control function shown in FIG. 1.

9 is a flowchart showing a control procedure of the microcomputer shown in FIG.

FIG. 10 is an outlet switching characteristic diagram of the automobile air conditioner shown in FIG. 1.

11 is a target outlet temperature characteristic diagram of the vehicle air conditioner shown in FIG.

FIG. 12 is a characteristic diagram showing a relationship between a difference between an in-vehicle temperature and a set temperature and a blower voltage.

FIG. 13 is a configuration diagram of a control device of the left and right independent temperature control type vehicle air conditioner shown in FIG. 5.

14 is a configuration diagram of a control device of an air conditioner for a vehicle in which a rear seat independent temperature control function is added to the left and right independent temperature control shown in FIG.

[Explanation of symbols]

1a ... right side duct casing 1b, 1b ', 1b "
... Dedicated duct casing, 1c ... Left duct casing, 3 ... Evaporator, 4 ... Heater core, 6 (6a, 6b, 6)
c) ... Air mix door, 9a, 9b, 9c ... Partition plate,
12 ... Microcomputer.

Claims (11)

[Claims] 1. An evaporator, a heater core that is a heating device that reheats air cooled by the evaporator, a hot air heated by passing through the heater core, and a bypass of the heater core. In the air conditioner for the air-conditioning system of the reheat air mix system equipped with the air mix door for adjusting the temperature of the blown air by changing the mixing ratio with the cold air, a heater core, an air mix door, an outlet switching door, etc. A heater unit composed of three parts is divided into three in the direction of air flow, and the cases on the left and right sides of the three divided heater units are made common, and the case at the center is changed. The air conditioner for automobiles is characterized by enabling the assembly of devices for each temperature control function. 2. In the standard type air conditioner according to claim 1, the heater unit functions as a dedicated case interposed between the left and right common cases of the heater unit to form one temperature control passage,
In the case of a left and right independent temperature control type air conditioner, it functions as a dedicated case that is interposed between the left and right common cases to form two temperature control passages. The air conditioner for automobiles is provided with a central case for each function, which functions as a special case that is interposed between the left and right common cases to form three temperature control passages. 3. A duct including an evaporator, a heater core, and an air mix door that adjusts an outlet temperature by changing a mixing ratio of hot air that has passed through the heater core and is heated and cold air that bypasses the heater core. An air conditioner for a vehicle, comprising a casing, wherein three partial duct casings are arranged in parallel to an air flow and are connected to each other to form the duct casing. 4. A duct including an evaporator, a heater core, and an air mix door that adjusts an outlet temperature by changing a mixing ratio of hot air that has passed through the heater core and is heated and cold air that bypasses the heater core. In an air conditioner for an automobile equipped with a casing, three partial duct casings are arranged in parallel to an air flow and are connected together to form the duct casing, and at the same time, an air is used as a central partial duct casing dedicated to left and right independent temperature control types. An air conditioner for an automobile, characterized in that a partition plate along the flow is provided in the center, and the partition plate defines left and right temperature control passages between the left and right partial duct casings. 5. A duct having a built-in evaporator, a heater core, and an air mix door that adjusts a blowing temperature by changing a mixing ratio of hot air that has passed through the heater core and is heated and cold air that bypasses the heater core. In an automobile air conditioner provided with a casing, three partial duct casings are arranged in parallel to an air flow to connect them to form the duct casing as an integral body, and a central partial duct casing for front and rear independent temperature control is used as an air duct. An air conditioner for an automobile, characterized in that partition plates along the flow are provided on both sides, and the partition plates define left, center, and right temperature control passages between the left and right partial duct casings, respectively. apparatus. 6. A duct including an evaporator, a heater core, and an air mix door that adjusts an outlet temperature by changing a mixing ratio of warm air that has passed through the heater core and is heated and cold air that bypasses the heater core. In an automobile air conditioner equipped with a casing, three partial duct casings are arranged in parallel to an air flow and are connected to form the duct casing as a unit. An air conditioner for a vehicle, characterized in that one temperature control passage is formed between the partial duct casing and the partial duct casing. 7. The vehicle according to claim 4, wherein the vehicle is equipped with a standard temperature control type, left / right independent temperature control type, or front / rear independent temperature control type air conditioner. A vehicle equipped with an air conditioner for a vehicle. 8. The partial duct casing at the center of the vehicle air conditioner according to claim 4, wherein a partition plate along the air flow is provided at the center. 9. The duct casing at the center of the automobile air conditioner according to claim 5, wherein partition walls along both sides of the air flow are provided and dedicated air mixing doors are provided inside. 10. The duct casing in the center of the automobile air conditioner according to claim 6, wherein one temperature control passage is formed between the partial duct casings on both sides. 11. The duct casing on both sides of the automobile air conditioner according to claim 3, wherein the duct casing has a structure integrally connected to any one of the duct casings according to claim 8. ..