JPH0288322A - Water cock opening/closing timing control device for automatic air conditioner - Google Patents

Abstract

PURPOSE:To achieve a temperature control at a good precision simultaneously with opening operation of an air mix door using a signal actuator by connecting the air mix door and a water cock with the single actuator through a link mechanism and providing a first link member and a second link member at the link mechanism. CONSTITUTION:In an actuator 45 is operated for temperature control, a first link member 48 operates first, which makes a water cock driven from a closed position to an open position to supply hot water through a supply passage to a heater core. If the actuator 45 continues operation, a second link 51 operates to drive an air mix door from a closed position to a desired position in the opening direction, and air passes through the heater core corresponding to the opening degree of the air mix door. Hot water is already supplied to the heater core and circulating in the heater core, so the air is heated sufficiently and mixed with air passing by the heater core.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an opening/closing timing control device for a water cock provided in a hot water supply path of an automatic air conditioner for a vehicle.

Conventional technology As a conventional auto air conditioner for vehicles, one with the structure shown in Figure 6 is in practical use (September 1980, published by Nissan Motor Co., Ltd. rNIssAN Service Bulletin JV-57)
(see page). That is, the air conditioner main body 90 is provided with a heater unit 94 having a plurality of air outlets 91, 92, 93, and a heater core 95 is housed in the heater unit 94. The heater core 95 is attached with a plurality of air mix doors 96 that regulate the amount of air passing through depending on the opening degree.
... are linked with an air mix door actuator 97.

On the other hand, the heater core 95 is supplied with hot water (
A supply path 99 for supplying (engine cooling water) is connected thereto. A water cock 100 is inserted into the supply path 99, and a water cock actuator 101 is linked to the water cock 100.

In such a structure, the near mix door acticoator 97 drives the air mix doors 96... and i=
When performing g, the water cock actuator 10
1 drives the water cock 100 to the open position.

As a result, hot water is supplied to the heater core 95 via the supply path 99, and the air passing through the heater core 95 is heated according to the opening degree of the air mix door 96.

This heated air is mixed with cold air that has bypassed the heater core 95, and after being adjusted to a desired temperature, it is sent to any of the air outlets 91, 92, and 93 that are opened depending on the air outlet mode.
It is fed into the passenger compartment via the .

Problem to be Solved by the Invention However, in such a conventional structure, although the air mix door 96... and the water cock 100 are members that operate in conjunction with each other, they each have different actuators 97. .1011: Since it is configured to be driven more, there is a cost disadvantage. Therefore, in order to reduce costs, air mix door 96...
It is conceivable that the water cock 100 and the water cock 100 are driven by the same actuator. However, if the air mix door 96... and the water cock 100 are simply driven by the same actuator, the air mix door 96... will operate at the same time as the water cock 100 opens, and hot water will flow into the heater core 95. Before being circulated, air passes through the heater core 95 depending on the opening degree of the air mix door 96. Therefore, the air that has passed through the heater core 95 is not sufficiently heated and mixes with the cold air that has bypassed the heater core 95, making it impossible to properly control the temperature of the blown air.

The present invention has been made in view of the above-mentioned problems in the prior art, and provides an automatic air conditioner water control system that uses a single actuator to simultaneously operate the air mix door opening operation and accurately adjust the A adjustment. The object of the present invention is to provide a cock opening/closing timing control device.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention includes a heater core that is housed in a heater unit of an air conditioner main body and uses hot water supplied from the engine as a heat source, and a heater core that uses hot water supplied from the engine as a heat source. In an auto air conditioner that has an air mix door that regulates the amount of air passing through according to the degree of opening, and a water cock that is provided in the hot water supply path and opens and closes the supply path, the air mix door and the water cock are linked. The link mechanism is linked to the same actuator via a mechanism, and the link mechanism includes:
First, there is a first link member that drives the water cock from the closed position to the open state, and a first link member that operates with a delay in driving the water cock and drives the air mix door from the closed position to any position in the opening direction. 2 link members are provided.

Operation In the above configuration, the water cock and the air mix door are driven to the closed position during so-called cool down. When the actuator is activated to adjust the temperature after the cool-down is completed, the first link member is activated, thereby driving the water cock from the closed position to the open position, and hot water is supplied to the heater core via the supply path. is supplied to When the actuator continues to operate, the second link operates, and the air mix door is driven from the closed position to any position in the opening direction, and air passes through the heater core depending on the degree of opening of the air mix door. At this time, since hot water has already been supplied to the heater core and is circulating within the heater core, the air is sufficiently heated and mixed with the air that has bypassed the heater core.

Example An embodiment of the present invention will be described below with reference to the drawings.

That is, as shown in FIG. 2, the air conditioner main body l includes two prour units 5. It is constructed by sequentially connecting a cooling unit 6 and a heater unit 7. The proa unit 5 includes:
A pair of intake doors 11.1 that open and close an outside air inlet 8 opened in the peripheral wall and an inside air inlet 9°10 facing each other.
2, and a fan 14 whose driving source is a blower motor 13. In the cooling unit 6, an evaporator 20 of a vapor compression type refrigeration cycle is arranged, and in the heater unit 7, an introduction tank 1 is installed on both sides.
A heater core 16 is provided, which includes a heater core 5a and a discharge tank 15b.

This heater unit 7 is of a so-called two-layer flow type, and the heater core 16 is disposed laterally along the flow direction of the air supplied by the fan 14, and the upstream ventilation surface 17 of the heater core 16 An upstream air guide 18 that divides the upstream side ventilation surface 19 into two, and a downstream air guide 21 that divides the upstream ventilation surface 19 into two are provided. The upstream air guide 18 extends in the upstream direction along one side wall 22 of the casing 4, and defines a first introduction path 23 between it and the upstream ventilation surface 17,
Further, a second introduction path 24 is defined between the negative side wall 22 and the negative side wall 22 . The outlet tank 15b and the other side wall 25 of the casing 4
A first bypass path 26 is formed between the introduction tank 15a and the rear wall 27 of the casing 4.
A bypass path 28 is formed. The derivation tank 15
A first air mix door 30 that opens and closes the first introduction path 23 is provided in the boss portion 29 formed in b.
A vent bypass door 31 is provided at the upstream end of the bypass passage 26 to open and close the first bypass passage 26 in cooperation with the first air mix door 30, and a second bypass door 31 is provided at the edge of the introduction tank 15a. A second air mix door 32 is provided to open and close the passage 28.

A first air mix chamber 33 and a second air mix chamber 34 are provided on both sides of the downstream air guide 21. The first air mix chamber 33 has a defrost outlet 35 oriented toward the front window.
The ventilator outlet 36 is connected to a ventilator outlet 36 provided in an instrument panel (not shown) disposed inside the vehicle.

A ventilator door 39 for opening and closing each of the ventilator outlets 36 and a defrost door 40 for opening and closing the defrost outlets 35 are provided at the downstream end of the first air mix chamber 33.

The second air mix chamber 34 communicates with a foot outlet 41 provided at the lower part of the vehicle interior, and is also provided with a foot door 42 for opening and closing the foot outlet 41. Second air mix chamber 33.
A bypass door 43 is provided at a portion where 34 communicates with each other.

Furthermore, a supply path 99 for supplying hot water (engine cooling water) from the engine 98 outlined in FIG. 6 is communicated with the introduction tank 15a, and a water cock 100 is inserted into the supply path 99.

On the other hand, the outside of the air conditioner main body 1 is shown in FIG.
As shown in B), an electric actuator 45 is provided with an arm 44 that rotates around a pivot point P1, and the arm 44 connects to the link mechanism 4 via a rod 46.
The first link member 48 is connected to one end of the first link member 48 composing the first link member 7 . The first link member 48 has a pivot point P approximately at the center;
A bottle 49 is fixed to a portion close to the one end, and a ron 50 linked to the water cock 100 is fixed to the other end.

Near the first link member 48, there is a pivot point P at one end.
A second link member 51 is provided which constitutes the link mechanism 47 together with the first link member 48, and the other end of the second link member 51 has a horizontal hole 52 and a vertical hole 53. A guide hole 54 is provided which is connected to the guide hole 54 . The pin 49 is loosely fitted into the guide hole 54, and a rod 55 linked to the second air mix door 32 is locked at a portion adjacent to the guide hole 54.

Note that the first air mix door 30 is operated by another actuator (not shown) different from the electric actuator 45.
is linked to.

In this embodiment having the above configuration, when the system is in a fully cooled state during cool-down in the VENT mode, the first air mix door 30 and the vent bypass door 31 are in the open position, as shown in FIG. At the same time, the second air mix door 32 is driven to the closed position, only the ventilator outlet 36 is opened, and the bypass door 43 is driven to the open position. Therefore, the cold air supplied from the cooling unit 6 flows into the second introduction path 24 and the first bypass path 26, and is blown out from the ventilator outlet 36 into the vehicle interior without passing through the heater core 16.

At this time, the link mechanism 47 is in the state shown in FIG. 2 air mix door 32 is also driven to the closed position as described above.

After the cool-down is completed, as shown in FIG. 4, the bypass door 43 is driven to the closed position, and the foot door 42 is
When the arm 44 is driven to the open position to set the B/L mode and the electric actuator 45 is activated to perform temperature control, the arm 44 moves in the direction of the arrow around the pivot point P1, as shown in FIG. 1(A). As a result, the a and seventh doors 46 move in the direction indicated by the arrow. Then, the first link member 48 rotates about the pivot point P in the convex direction indicated by the arrow, and thereby the rod 50 moves in the two directions indicated by the arrow, and the water cock 10
0 is about 1/3 open when fully opened, and the hot water flow rate is 5th.
As shown by the dotted line in the figure, it is 80% or more when fully opened.

Therefore, hot water is supplied from the engine 98 into the introduction tank 15a via the supply path 99, and after circulating through the heater core 16, from the outlet tank 15b to the engine 98.
to return to. At this time, since the bottle 49 moves freely within the missed swing range α, which is the length dimension of the horizontal hole 52, the start of operation of the second link member 51 is delayed from that of the first link member, and during this time, the second link member 51 starts operating later than the first link member. The member 51 remains in its normal position without operating. Therefore, the rod 55 is not operated, and the second air mix door 32 is maintained in the open state as shown by the solid line in FIG.

Then, when the electric actuator 45 continues to operate in the direction indicated by the arrow A, the first link member 48 also continues to operate in the convex direction indicated by the arrow, and as shown in FIG. The water cock 100 is fully opened. In synchronization with this, the second link member 51 moves to the pivot point P
, the rod 55 rotates in the small direction of the arrow.
moves in the direction indicated by the arrow, and the second air mix door 32 is driven to any opening degree from the closed position (0 degrees) to the open position (3011). As a result, the second air mix door 32
The cold air passes through the heater core 16 according to the opening degree of the heater core 16, and at this time, since the hot water has already been supplied to the heater core 16 and is circulating within the heater core 16, the cold air is sufficiently heated. The cold air that has passed through the second bypass passage 28 is mixed in the second air mixture chamber 34 to reach a desired temperature, and is then fed into the vehicle interior through the foot outlet 41.

Therefore, by using the single electric actuator 45 in this way, the water cock 100 and the second air mix door 3 can be operated.
While operating the second air mix door 32, it becomes possible to perform temperature control with high accuracy from the time the second air mix door 32 is operated.

Furthermore, when the first air mix door 30 and the vent bypass door 31 are respectively rotated in the direction of the arrow in FIG.
6 is in a sufficiently heated state, both doors 30.
Of course, it is possible to adjust the desired temperature in the first air mix chamber 33 immediately after the operation of the first air mix chamber 31.

DETAILED DESCRIPTION OF THE INVENTION As described in detail, in the present invention, the air, water, and water hooks are driven by the same actuator via a link mechanism, compared to the conventional case in which they are driven by different actuators. This can significantly reduce costs. Moreover, the link mechanism includes a first link member that drives the water cock from the closed position to the open position, and a first link member that operates with a delay in driving the water cock to move the air mix door from the closed position to the open direction. Since a second driving link member is provided, the water cock can always be opened prior to the operation of the air mix door. This makes it possible to precisely control the temperature at the same time as the mix door operates.

[Brief explanation of the drawing]

FIG. 1 (Δ) is a plan view showing the state in which the second air mix door and water cock of the link mechanism according to an embodiment of the present invention are closed, and FIG. 1 (B) is a plan view showing the state in which they are opened. , FIG. 2 is an overall conceptual diagram of the same embodiment, FIGS. 3 and 4 are conceptual diagrams showing the state of the same embodiment during temperature control, FIG. 5 is an operating characteristic diagram of the same embodiment, and FIG. 6 is a conceptual diagram of the same embodiment. 1 is a conceptual diagram of main parts showing a water cock opening/closing structure of a conventional automatic air conditioner. 1...Air conditioner main body, 7...Heater unit, 16
Heater core, 32... (second) air mix door, 4
5... (electric) actuator, 47... link mechanism, 48... first link member, 51... second link member. Figure

Claims (1)

[Claims] (1) A heater core that is housed in the heater unit of the air conditioner main body and uses hot water as a heat source, an air mix door that regulates the amount of air passing through the heater core according to the degree of opening, and a heater core that is installed in the hot water supply path and that supplies the hot water. In an automatic air conditioner having a water cock that opens and closes a passage, the air mix door and the water cock are linked to the same actuator via a link mechanism, and the link mechanism has a , a first link member that drives the water cock from the closed position to the open state, and a second link member that operates with a delay in driving the water cock and drives the air mix door from the closed position to the open direction.
A water cock opening/closing timing control device for an automatic air conditioner, characterized in that a link member is provided.