JPS62155115A - Airconditioning device for vehicle - Google Patents

Abstract

PURPOSE:To reduce ventilation resistance within a duct in an airconditioning device of such type as cooling a head and warming feet by fitting a divisional plate between the outlet of a heat exchanger for heating and the inlet of a blower, and dividing an air passage into two portions. CONSTITUTION:Between the outlet of a heater core 6 and the inlet 10a of a blower 10 is provided a divisional plate 8 with one end thereof opposing the intermediate part of said inlet 10a and the other end located lower than the center of said heater core 6, and an air passage between the heater core 6 and the blower 10 is divided into an upper air passage A and a lower air passage B, thereby enabling the formation of a hot air flow in the lower air passage B at the time of a bi-level mode and a cold air flow in the upper air passage A. Also, a damper 9 of MAX-COOL is fitted under the divisional plate 9 for preventing cold air in the passage B from being in contact with the heater core 6 or warm air at the heater core 6 from coming into the passage B. According to the aforesaid constitution, an increase in ventilation resistance is restricted and it is possible to obtain an airconditioning device of such type as cooling a head and warming feet.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to an air conditioner for a vehicle that can independently adjust the temperature of air blown into an upper space and a lower space within a vehicle interior.

[Conventional technology 1] For automobiles, especially passenger cars, whose driving performance has reached a nearly satisfactory level, one of the important future technological challenges is to maintain a more comfortable air-conditioned condition inside the vehicle. . Various methods have been devised to perform air conditioning as efficiently as possible under the constraints of poor thermal insulation of the vehicle body structure and insufficient surplus thermal energy supply.

For example, Japanese Unexamined Utility Model No. 58-76412J discloses a vehicle air conditioner having a feature that makes it easy to obtain a temperature distribution that keeps the head cold and feet warm, which is both sensory and physiologically favorable and also leads to old energy.

FIG. 4 is a schematic side sectional view of the above air conditioner. Inside the air conditioning duct 100, which also serves as the housing of the device, there is a blower 102 facing the air intake port 101, and a cooling heat exchanger downstream of the blower 102. A vessel 103 is arranged, and a duct 10
An upper outlet 107 for mainly blowing cold air toward the upper space of the vehicle interior and a lower outlet 108 for blowing warm air toward the lower space of the vehicle interior are opened at the downstream end of the vehicle.

The downstream area of the cooling heat exchanger 103 has an air outlet 107.
The partition plate 11 separates the air path between the
0a and 110b are provided. Each air passage includes a heating heat exchanger 105 (corresponding to each half of one heat exchanger), cold air passages a and b that bypass this heat exchanger and communicate downstream, and a heat exchanger 105. Air mix dampers 104A and 10 for adjusting the amount of air passed through the
Contains 4B. Air mix dampers 106A and 106B are provided downstream of the heat exchanger 105 to evenly mix hot air and cold air. 10 in the diagram
9 is an air outlet for preventing fogging of window glass, and 111 and 112 are dampers for opening and closing each air outlet.

The above air conditioner can separately adjust the temperature of the air blown from the two air outlets 107 and 108 by individually operating each of the two air mix dampers 104A and 104B.

[Problems to be Solved by the Invention] Although the air conditioner with the above structure has sufficient performance in the function of air conditioning the vehicle interior with an ideal temperature distribution of cold head and warm feet, On the other hand, the partition plate 110
The presence of a and 110b significantly increases the ventilation resistance within the duct, resulting in a disadvantage that the amount of air blown is noticeably reduced.

As confirmed through experiments, this liJ[il reduction rate was found to be as high as 5 to 8%.

SUMMARY OF THE INVENTION An object of the present invention is to provide a head-cooling, foot-heating type air conditioner in which the disadvantage of increased ventilation resistance within an air conditioning duct by providing an air path dividing partition plate within the air conditioning duct is improved.

[Means for Solving the Problems] In order to achieve the above object, the vehicle air conditioner according to the present invention includes an air conditioning duct 1 to 1 including an air inlet and an air outlet, and an upstream side in the air conditioning duct. cooling heat exchanger installed in
and a centrifugal blower equipped with a scroll casing, the suction port of which is connected to the outlet of the air conditioning duct; A partition plate is provided to divide the air path leading to the inlet into two air paths, one-half side and the other side, and bypasses the heating heat exchanger to separate the air path from the upstream side of the heat exchanger to the above-mentioned air path. A first cold air passage and a second cold air passage are provided on the inlet side of the heating heat exchanger to connect the one half side and the other half side air passages, respectively. a first air mix damper and a second air mix damper for respectively adjusting the temperature of the inflowing air; and a second air mix damper for blowing out the warm air that has entered the one-half air passage primarily toward the feet of the passenger. A configuration is adopted that includes a blower outlet, and a blower outlet duct that has a blower outlet for blowing out the cold air that has flowed into the other half air passage mainly toward the upper body, and is connected to the outlet of the blower.

[Function] In the device of the present invention having the above-described configuration, the cold air introduced into the duct h from the air inlet by the suction force of the blower and passed through the cooling heat exchanger passes through the heating heat exchanger downstream thereof. When reaching the outlet of the central vent, the very short air path from this outlet to the blower inlet is divided into two by the presence of a partition plate that divides the air flow into two paths, and one half of the air path is divided into two. The air that has followed the air path is drawn into one half area of the blower inlet, and the air that has followed the air path on the other side is sucked into the other area of the blower inlet. Due to the existence of a partition plate attached to the scroll casing in a specific direction, one side of the intake air flows along the inner peripheral surface of the scroll casing, and the other side (upper side) is connected to the blower outlet.
The intake air flows along the outer peripheral surface of the scroll casing and is mainly blown out from the other (lower) outlet connected to the outlet of the blower.

The hot air and cold air that flow into each air path with an arbitrary air volume ratio depending on the opening/closing degree of the air mix damper installed upstream of each air path on the one-half side and the user side, flow through the blower for as long as they can be handled. The air is evenly mixed with the air, and air conditioned to a desired temperature is blown out from both secondary outlets.

Therefore, if one side of the air is blown toward the upper space of the vehicle interior and the other side of the air is blown toward the lower space of the vehicle interior, a cold-head-heat-feet-type temperature distribution in the vehicle interior with a desired degree of emphasis can be obtained.

[Example] A specific configuration of the present invention will be described below based on an example shown in the accompanying drawings.

FIGS. 1 and 2 are a side sectional view and a (A)-(A) sectional view thereof showing an embodiment of the present invention, in which an air conditioning duct 1 made of synthetic resin or the like is placed on one end. An outside air intake 2 and an inside air intake 3 are opened, and these two air inlets can be selectively opened and closed by an inside/outside air switching damper 4. On the upstream side of the duct 1, there is an evaporator 5 as a cooling heat exchanger.
A heater core 6 serving as a hot water heating heat exchanger is housed downstream thereof.

An air outlet 1a of the air conditioning duct 1 is connected to an inlet 10a of a centrifugal blower including a scroll casing 10. 11 is a blower fan, 12 is a blower motor, 1
3 is a nose portion of the scroll casing 10.

The air path from the outlet of the heater core 6 to the blower suction port 10a is divided into two air paths A and B, one half side and the other side (upper half side and lower half side in Fig. 1). Partition plate 8 for
is provided. In this embodiment, the partition plate 8 is integrally molded with one half of the casing of the heater core 6, which has a two-part structure made of synthetic resin. Good too.

Method 1 of attaching it to the scroll casing 10 is not preferable in terms of generation of swinging noise.

In some cases, the partition plate 8 is located at the center of the suction port 10a of the centrifugal blower, but the heater core 6 facing it is placed in the upper passage A.
The lower passage B is partitioned unevenly. This is to create hot air on the lower side and cold air on the upper side during the pie level (B/L) mode to achieve a cold head and warm feet. At this time, the width of the partition plate 8 needs to match the width of the air conditioning duct 1.

A first air mix damper 7 is installed at the upstream inlet of the heater core 6 to adjust the warm air m flowing into two air paths Δ and B divided by a partition plate 8.
△ and a second air mix damper 7B are provided,
The degrees of opening of the upper and lower inlet halves of the heater core 6 are changed.

Unlike the evaporator 5, the heater core 6 is made smaller enough to completely seal off the cross section within the air conditioning duct 1, and is placed in the center of the duct, so it is As shown in FIG. 2, a first cold air passage d and a second cold air passage e are provided on the upper and lower sides of the heater core 6, respectively, for bypassing the heater core 6 and communicating the air passage A or the air passage B with the upstream side thereof. It is formed.

At the outlet of the heater core 6, which is in contact with the lower air passage B, there is a
An X-CO leaf damper 9 is attached. The function of this damper 9 is to connect two air mix dampers 7A and 7B.
Warm air to the lower air passage A and strong cold air to the lower air passage B ()4
AX-COOL), the cold air in the air path B may come into contact with the heater core 6 or may flow into the upper side of the inlet of the heater core 6 depending on the structure of the heater core 6. Air can be handled to the bottom of the outlet and air path B
The purpose is to prevent the inconvenience of hot air entering the interior.

A blowout log 20 having a plurality of conditioned air outlets is connected to the blower outlet 10b.

As can be understood by referring to FIGS. 2 and 1, in the air conditioner according to the present invention, the blower inlet 10a is connected to the partition plate 8.
It is divided into an intake area for the air supplied from the air passage A and an intake area for the air supplied from the air passage B, which are formed by the presence of the partition plate 8.
Since the direction of the plate surface is arranged to face the line connecting the nose portion 13 of the scroll casing 10 and the rotating shaft of the blower fan, considering the shape of the air passage inside the scroll casing 10, the intake air is drawn from the air passage A. The air flows along the inner peripheral surface of the scroll casing 10 as shown by the arrow (
Follow the flow path as shown in b) and reach approximately the discharge port 10.
It is blown out towards the lower half of b. On the other hand, the air sucked from the pressure path B follows the flow path indicated by the arrow (A) almost along the outer circumferential surface inside the scroll casing 10, and is blown out roughly toward the upper half of the discharge port 101). A phenomenon occurs.

Therefore, the blow-off duct 20 has a pendeletion blow-off port 21 in an upward position facing the upper half of the blower casing's discharge port 10b, and a downward position facing the lower half of the discharge port 10b of the blower casing. Air outlets 22 and 23 are provided. The heat outlet 23 has a pair of left and right openings in the lateral direction of the vehicle body. Furthermore, a defrost air outlet 24 is opened toward the lower part of the windshield D of the vehicle body adjacent to the pendeletion air outlet 21.

E in the figure is a crash pad, and F is a steering handle.

25 is a 3-mode damper that determines the opening/closing state of each air outlet, and the 8th time (1st
26 is a differential vent damper, The pendeletion outlet 21 and the defrost outlet 24 are selectively opened and closed. 27 is a differential damper, and even when this damper is closed, some of the windshield anti-fogging function remains. , has a damper area smaller than the cross-sectional area of the air outlet 24.

FIG. 3 is a front view of the operation panel of the vehicle air conditioner according to the present invention, and this panel is normally attached to the driver's seat instrument panel. Reference numeral 50 indicates the base of the panel, and 51 indicates a predetermined interlocking relationship between the air mix dampers 7A and 7B for adjusting the air temperature of the upper air passage A and the lower air passage B through a link mechanism. An up/down movement adjustment lever 52 is used to control the air temperature in the lower air passage B (therefore, when the air mix dampers 7A and 7B are rotated independently). The upper temperature control lever is for adjusting the temperature of the heat outlet 21, and is activated when the B/L outlet air conditioning mode is set.
2 (and 23) acts as a lower temperature control lever for adjusting the humidity of the blown air. What is B/L?Pendelesion outlet 21
This is an abbreviation representing a state in which air-conditioning air is simultaneously blown out from the heat outlet 22 and the temperature of the air blown out toward the upper space and lower space of the vehicle interior is individually adjusted. 53 is an air conditioning mode switching lever, and by moving it along the moving guide groove 53a, the defrost (OFF), face (
VENT), B/L, and foot (HEAT) (7
) Four types of blowout air conditioning modes can be realized.

Each time the switching lever 53 is moved to each air conditioning mode, the above-mentioned blow-off rod bars 25, 26, 27 provided at each blow-off port 21, 22, 23 connected to the discharge 0.10b of the scroll casing 10, Due to the special function of the links connecting these damper groups, each is switched after a specific interlocking state, which will be described later.

The two air mix dampers 7A and 7B can be rotated individually as described above only in the B/L air conditioning mode through the function of such a link, and the interlocking relationship is maintained in other air conditioning modes. drooping

Reference numeral 54 denotes a lever for changing the rotation speed of the blower motor 12, and in this embodiment, the rotation speed is set to low (to), medium (Hi), and high (I).
I + ). Reference numeral 55 denotes an inside/outside air switching lever, which can take inside air introduction (RFC), outside air introduction (FIIE), and intermediate positions by rotating the inside/outside air switching damper 4.

56 is an air conditioner switch that turns on and off the operation of the refrigerant compressor of the cooling refrigerator. Reference numbers with a lowercase letter a in the drawings indicate lever guide grooves with corresponding reference numbers.

Next, the operation of the above embodiment device will be explained for each blowout air conditioning mode with reference to a list of the operating states of each damper summarized in Table 1.

Table 1 1) Symbols a, b and C correspond to the rotational positions of each damper depicted in FIG.

2)) The 4AX-COOL damper 9 is operated by the upper/non-interlocking temperature control lever 51 or the upper temperature control lever 5 in each air conditioning mode.
It occupies the b position only when 2 is set in the HAX-COOL position, otherwise it is in the a position of the symbol.

[Pendeletion air conditioning mode] Pendeletion outlet 21 is used mainly for cooling or ventilation.
In the air conditioning mode that blows cold air from the The outlet 22 (and the same applies to 23 and the following) is closed, the defrost outlet damper 26 closes the defrost outlet 24, and only the pendeletion outlet 21 is opened.

In this air conditioning mode, by moving the upper/non-interlocking temperature control lever 51 left and right, the two air mix dampers 7
Since A and 7B open and close in the same direction and with the same degree of opening, air paths A and 8 receive the warm air that has passed through the heater core 6 and the cold air that has passed through the cold air path a or b, respectively, in proportions according to the opening degree of the air mix damper. It flows in with. The two composite flows of cold air and warm air sucked into the blower suction port 10a from the air passages A and B are uniformly mixed by the blower fan 11 and the mixed flow action within the scroll casing 10, respectively. At this time, air at the desired temperature selected by the temperature control lever 51 is flowed from this air outlet by merging toward the bending outlet 21, which is the only one open at this time, as shown in FIG. The air is blown out almost toward the center of the vehicle interior space. When the temperature control lever 51 is set to the HAX-Co leaf position, the IAX-CO leaf damper 9 is rotated to the position where it blocks the lower half of the outlet side of the heater core 6, as shown in (e) above. play that role. The HAX-CO leaf damper 9 is interlocked with the temperature control lever 51 via a link mechanism (not shown).

[Heat Blow Air Conditioning Mode 1 This is a heating mode in which hot air is blown downward into the vehicle interior, and each damper is located at the position shown in Table 1, and the 3-mode damper 25 connects all the blow-off ports 21 to 24 with the blower. The differential damper 27
As mentioned above, since the defrost outlet 24 is not completely closed, the defrost function is also performed.

As in the case of the above mode, the two air mix dampers IA and 7B are designed in an interlocking relationship.

[Defrost (defrost) blowout air conditioning mode] This is an air conditioning mode mainly for preventing fogging of the windshield D. Each damper occupies the position shown in Table 1, and only the defrost damper 27 takes the open position and heat blowing is performed. The outlet 22 is connected to a three-mode damper 25, and the bending outlet 21 is closed by a differential vent damper 26.

Similar to the above two air conditioning modes, the two air mix dampers 7A and 7B are placed in an interlocking relationship.

[B/L Blowout Air Conditioning Mode] This is an air conditioning mode that realizes a so-called cold head/hot foot type temperature distribution inside the vehicle to an arbitrary degree, and each damper occupies the position shown in Table 1. Hitting 3 mode damper 25
occupies an intermediate position C between the two secondary outlets in order to open both the bending outlet 21 and the heat outlet 22, and the differential vent damper 26 occupies a position in which the bending outlet 21 is opened. Move the air conditioning mode switching lever 53 to B
/L position, in response to this movement of the lever, the link mechanism that controls the interlocking of the upper/non-linked W temperature lever 51 and the upper temperature control lever 52 acts to release the linkage of these two levers, and The interlocking temperature control lever 51 functions only as a lower temperature control lever dedicated to adjusting the air temperature to the upper air path. Therefore, by appropriately operating the two levers 51 and 52, the temperature of the air conditioning air blown out from the bending outlet 21 and the temperature of the air blown out from the heat outlet 22 can be adjusted to have a fairly wide temperature difference. It can be moved up and down arbitrarily. HAX the upper temperature control lever 52
As described above, when the cylinder 1 is moved to the -CO leaf position, the HAX-Co leaf damper 9 performs its function.

Under this air conditioning mode, the upper/non-interlocked temperature control lever 51 (under this air conditioning mode, is exclusively used for upper side temperature control) is operated by HAX.
-110T position and upper humidity control lever 52)IA
When brought into the X-CO state, as described above, a large portion of the warm air sucked into the blower suction port 108 from the upper air passage A is blown out to the lower area of the blower discharge port 10b, and opens at the opposite position. Heat is blown out from the heat outlet 22 toward the lower space of the vehicle interior, and from the lower air passage B to the blower inlet 1.
Most of the cold air sucked into the blower outlet 10
The air is blown into the upper area of b, and the air is blown out into the upper space of the vehicle interior from the pendeletion outlet 21 that opens at the opposite position, so the temperature distribution in the vehicle interior is clearly emphasized to the maximum with a cool head and warm feet. can be obtained.

Comparing the air conditioner of the above embodiment with the conventional air conditioner shown in FIG. The problem of the significant increase in ventilation resistance of the conventional device due to this is reduced to an almost negligible level. Then, by utilizing this partition plate, the scroll casing 10 has the role of allowing the air flow divided into two upper and lower air channels by this partition plate to reach the blower discharge port 10b in the divided state b. By adopting a unique method of having air mix dampers 7A and 7B, each of the temperature-controlled air streams, which are individually temperature-controlled by the two air mix dampers 7A and 7B and supplied to the two air paths A and B, respectively, is Air can be blown out separately into the upper space and lower space of the vehicle interior from a dedicated air outlet.

Further, unlike the conventional device, the present invention is different from the conventional device in that the warm air passing through the heater core 6 and the cold heat bypassing the heater core 6 are effectively mixed in the blower.
The air mix chambers shown in 06A and 106B are no longer necessary, and the effect of reducing the external dimensions of the air conditioner is also reduced.

Although not shown in the above embodiment diagram, in order to more clearly separate the two air flows (a) and (b) within the scroll casing 10, an appropriate partition plate is installed in the air flow direction within the scroll state path. However, in that case, it is necessary to take into consideration the increase in ventilation resistance caused by the partition plates.

[Effects of the Invention] The device of the present invention having the above configuration is a device that connects the intake port of the blower to the air outlet of the air conditioning duct, which is almost exclusively adopted in conventional vehicle air conditioners. By adopting an assembly method (air suction method in the industry), an extremely long duct internal partition is incorporated in the device described in the prior art section to achieve a so-called cold-head-heat-feet type temperature distribution inside the vehicle. By simply assembling extremely short partition plates into the duct using a specific method instead of plates, the same effect as conventional long partition plates can be obtained. Therefore, it becomes possible to achieve head-cooling, foot-heating type air conditioning with very simple means without the disadvantage of reduced air blowing capacity.

In addition, since the warm air that has passed through the heater core and the cold air that has bypassed the heater taco are sufficiently mixed while passing through the blower, the air mix chamber for mixing cold and hot air in conventional equipment is no longer necessary, and the entire equipment can be made more compact. This makes it possible to install it in small cars, which was traditionally difficult to install.

[Brief explanation of drawings]

1 to 3 are views of one embodiment of the device of the present invention, in which FIG. 1 is a schematic side sectional view of the device, and FIG. 2 is a cross section taken along line (A)-(A) in FIG. 1. 3 are front views of the operation panel of the apparatus. FIG. 4 is a schematic side sectional view of a conventional air conditioner. In the diagram 1...Air conditioning duct 2...Outside air population 3.
... Inside air population 5 ... Cooling heat exchanger 6 ... Heating heat exchanger 7A, 7B ... First and second air mix dampers 8 ... Partition plate 9 ...) IAX- C
O-ko damper 10...Blower scroll casing 10a, 10b...Blower inlet and outlet
20...Air outlet duct dle...First and second
Cold air path 11...Blower fan A...-Single side (upper side) air path 8...Other half side (lower side) air path 21...Air outlet of air path B (ventilation outlet) 22.23・
... Air outlet of air path △ (heat outlet) Figure 2 Figure 3 Figure 4

Claims (3)

[Claims] (1) (a) An air conditioning duct comprising an air inlet and an air outlet; (b)
) A cooling heat exchanger provided on the upstream side of the air conditioning duct;
and a heating heat exchanger provided on the downstream side thereof; (c) a centrifugal blower including a scroll casing whose suction port is connected to the outlet of the air conditioning duct; and (d) a heating heat exchanger. (e) a partition plate for dividing the air path from the outlet to the suction port of the blower into two air paths, one half side and the other half side; (e) bypassing the heating heat exchanger; (f) a first cold air passage and a second cold air passage for communicating the upstream side of the heat exchanger with the one half side air passage and the other half side air passage, respectively; (f) provided on the inlet side of the heating heat exchanger; , a first air mix damper and a second air mix damper for adjusting the temperature of the air flowing into the one half side air passage and the other half side air passage, respectively; (g) the temperature flowing into the one half side air passage; The blower has a blower outlet for blowing the wind mainly toward the passenger's feet, and a blower outlet for blowing the cold air flowing into the other half side air passage mainly toward the upper body of the passenger. A vehicle air conditioner comprising a connected air outlet duct. (2) The vehicle air conditioner according to claim 1, further comprising means for opening and closing the first and second air mix dampers interlockingly and independently. . (3) When the first air mix damper is rotated to the heating side and the second air mix damper is rotated to the strong cooling side, the outlet facing the air passage on the other half side of the heat exchanger is rotated. The vehicle air conditioner according to claim 1 or 2, further comprising a damper for sealing. 4) The partition plate is attached with its plate surface facing in a direction substantially opposite to a line connecting the nose portion of the scroll casing and the rotating shaft of the blower. The vehicle air conditioner according to any one of items 1 to 3.