JPS61253210A - Car air conditioner - Google Patents

Abstract

PURPOSE:To prevent a decline in cooling capability of a car air conditioner without a water valve by arranging close mutual magnetic adhesion of an air mix sub door and a heater core at the maximum cooling position of a heater control lever. CONSTITUTION:When a heater control lever 8a is set to the maximum cooling position C, an air mix door 6 and an air mix sub door 7 are completely closed through a wire cable 8b, while air suctioned through a floor 3 passes through an evaporator 4, and after being turned into cooled air, blows out into the car. And when the heater control lever 8a enters backlash scope U, the switch 8c is turned on, magnetizing an electromagnet 5b. Accordingly, the suctioned member 7a of the air mix sub door 7 is drawn to the electromagnet 5b, and the sub door 7 and a sealing frame 5a adhere closely, thereby sealing space between a heat core 5 and the sub door 7. Based on this arrangement, leakage of warm air here can be prevented, so that the cooling effect of the equipment is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vehicle air conditioner that does not include water pulp.

C# Kinobokan) In conventional vehicle water valveless air conditioners,
For example, Jikko Sho 67-. As shown in Publication No. 2J'Otsu//, the air introduced into the main body case by the blower is first cooled and dehumidified by the F5 porator, and then passed through the heater core through which engine cooling water is constantly flowing. The temperature of the air blown into the passenger compartment is determined by the mixing ratio of the cold air that bypasses the heater core and the warm air that passes through the heater core, using air mix doors and air mix subdoors installed before and after the heater core. I was making adjustments by changing the . During maximum cooling, the air in the closed space between the two doors is ventilated into the engine room to prevent heat radiation from the heater core to the blown air.

However, with the above structure, the side door seal becomes incomplete due to hysteresis in the link mechanism that opens and closes the air mix door and air mix subdoor, causing hot air around the heater core to leak into the vent outlet during maximum cooling, reducing cooling capacity. There was a problem that the

(Object of the Invention) In view of the above-mentioned problems of the prior art, the present invention brings the contact surfaces of the air mix subdoor and the heater core into close contact with each other using the suction force of an electromagnet during maximum cooling, so that warm air around the heater core is vented. The purpose is to prevent the cooling capacity from decreasing by preventing leakage from the air outlet.

(Structure of the Invention) Means for achieving the above object of the present invention is such that an air mix door and an air mix subdoor are provided so as to be openable and closable before and after a heater core disposed downstream of an evaporator, and the heater core is provided with an air mix door and an air mix subdoor that are openable and closable. In a vehicle air conditioner configured to allow water to flow, an electromagnet is disposed on at least one of the contact surfaces of the air mix subdoor and the heater core, and a member that is attracted to the electromagnet is disposed on the other, It is characterized in that the electromagnetic switch is installed at a position that is turned on near the maximum cooling position of the heater control lever.

The function of the air conditioner of the present invention is that when the heater control lever is set to the maximum cooling position, the air mix door and air mix subdoor are not fully closed, and the cold air cooled and dehumidified by the evaporator bypasses the heater core. It is blown out into the passenger compartment from the vent outlet. On the other hand, the electromagnet is switched on and the electromagnet is energized. Therefore, the abutting surfaces of the air mix subdoor and the heater core are brought into close contact by the suction force of the electromagnet, which prevents warm air around the heater core from leaking out to the vent outlet and reducing the cooling capacity. An allowance is given to the part of the heater control lever that exceeds the maximum cooling position, and within this allowance, the two doors will not interlock and only the electromagnetic switch will be operated. ing. Therefore, the operating force of the heater control lever does not increase.

(Example) Hereinafter, one embodiment of the present invention will be described based on the drawings.

As shown in FIG. 1, the air conditioner 1 of this embodiment includes a blower 6, a blower 6,
An evaporator 4 and a heater core 5 are arranged, an air mix door 6 and an air mix subdoor 7 are arranged before and after the heater core 5, and an opening/closing device 8 is attached to both doors 6.7.

An outside air inlet 2a and a vehicle interior air inlet 2b are formed at the upstream end of the main body case 2, and both inlets 2a,
'lb has a main door 2C that adjusts the amount of air passing through them.
A bypass passage 2d for the heater core 5 is formed in the intermediate part, and a vent outlet 2e, a warm air outlet 2f, and a defroster outlet 2q are provided at the downstream end.
are formed, and adjustment doors 2h, 2i, and 2j for adjusting the air volume are attached to these air outlets 2e, 2f, and 2q so as to be openable and closable, respectively.

The proar 6 sucks outside air or vehicle interior air from the inlet 2a or 2b and sends it to the evaporator 4. The evaporator 4 is a cooling heat exchanger that cools and dehumidifies the air passing through it. The heater core 5 is configured so that engine cooling water constantly flows inside it. Cold extraction method 1. This is a heating heat exchanger that heats Atsuba eggplant. As shown in FIG. 2, a seal frame 5a is formed on the outer peripheral edge of the rear surface of the heater core 5, and a predetermined number of electromagnets 5b are attached to the seal frame 5a.

The air mix door 6 is a door that adjusts the mixing ratio of the warm air passing through the heater core 5 and the cold air passing through the bypass passage 2d, and is attached to the front surface of the heater core 5 so as to be openable and closable. The air mix subdoor 7 is a door that comes into contact with the rear surface of the seal frame 5a for sealing when closed, and is attached to the rear of the seal frame 5a so as to be openable and closable. A suction member 7a made of a material such as a steel plate is attached to face the electromagnet 5b.

The opening/closing device 8 is configured to open and close the air mix door 6 and the air mix subdoor 7 in conjunction with each other via a wire cable 8b connected to the lever 8a by operating a heater control lever 8a. . The heater control lever 8a has an opening/closing stroke S from a maximum heating position H to a maximum cooling position C, and a slight amount of play T, U is provided at both ends of the opening/closing stroke S. Even if the heater control lever 8a moves within the allowances T and U, the air mix door 6 and air mix subdoor 7 do not move.

A switch 8C is installed at a position that is turned on when the heater control lever 8a enters the free play U, and the switch 8C is connected to the electromagnet 5b via a battery 8d. Note that the mechanism for providing the free allowances T and U will be explained based on FIG. 2.

The wire cable 8b has one end connected to one arm of the bell crank 8f, and the other end connected to the heater control lever 9a.
It is connected to the. A guide groove 8q is formed in the other arm of the bell crank 8f, and the guide groove 8q is formed by forming allowances t and u at both ends of an opening/closing portion S having a predetermined curve. Play fee t.

U consists of two large and small circular arcs, each centered on the rotation axis 8h of the bell crank 8f. A pin 8j fixed to the swing lever 81 is slidably fitted into the guide groove 8q, and the tip of the swing lever 81 is fixed to the rotating shaft 6b of the air mix door 6 via a rod 8k. It is connected to the tip of the opening/closing lever 6C. FIG. 2 shows the maximum heating state, where the heater control lever 8a is within the free play T, the air mix door 6 is in the fully open position, and the rod 9 and link 10 connected to the other end of the opening/closing lever O are shown in FIG. The air mix subdoor 7, which is connected via the air mixer door 7, is also fully open. When the heater control lever 8a is operated to the maximum cooling position C, the wire cable 8b is pulled (in the direction of the arrow in the figure), and the bell crank 8f is pulled.
rotates. Heater control lever 8a has free play T
While the bin 8j is inside, the swing lever 81 does not move because the bin 8j is also within the free play T, and the air mix subdoor 7 remains open. When the heater control lever 8a enters the opening/closing stroke S, the bottle 8j enters the opening/closing part S, the swing lever 81 rotates, and the opening/closing lever ++6 is attached to the rod 8.
Close the air mix door 6 via 0. When the heater control lever 8a reaches the maximum cooling position C, the air mix door 6 and air mix subdoor 7 are fully closed, and when the heater control lever 8a moves further and enters the free play U, the pin 8j also enters the free play U, so the swing lever is closed. 81 will stop and the air mix sub door 7 will also stop with it fully closed, so Al. Needless to say, when operating the heater control lever 8a from maximum cooling to maximum heating, the operation is reversed to the above. FIG. 3 is a diagram showing the relationship between the operation position X of the heater control lever 8a and the opening degree Y of the air mix subdoor 7.

Now, the action of the air conditioner 1 of this embodiment is to operate the heater control lever 8 to the maximum cooling position C during maximum cooling. The lever 8a fully opens the air mix door 6 and the air mix subdoor 7 via the wire cable 8b. The proa 3 sucks outside air through an inlet 2 a and air inside the vehicle through an inlet 2 b into the main body case 2 and sends the air to the evaporator 4 . All of the cold air cooled and dehumidified by the evaporator 4 is blown into the vehicle interior from the vent outlet 2e via the bypass passage 2d. When the heater control lever 8a enters the play range U, the air mix door 6 and the air mix subdoor 7 remain fully open and do not move, but the switch 8C is turned on and the electromagnet 5b is energized. The electromagnet 5b attracts the suction member 7a to bring the contact surfaces of the air mix subdoor 7 and the seal frame 5a into close contact, thereby improving sealing performance. In this way, hot air around the heater core 5 is prevented from leaking into the vent outlet 2e and reducing the cooling capacity.

Conversely, at maximum heating, the heater control lever 8a
to the maximum heating position H. While the heater control lever 8a is within the free play U, the air mix door 6 and air mix subdoor 7 remain fully closed and do not move.
When the switch 8C is turned off and the electromagnet 5b is demagnetized, the attraction force acting on the attraction member 7a disappears. When the heater control V bar 8a enters the opening/closing process S, the air mix door 6 and the air mix subdoor 7 are opened, and when the maximum heating position H is reached, both doors 6.7 are fully opened.

The air sucked by the blower 3 from the inlet ports 2a and 2b passes through the evaporator 4 without being cooled, and is heated by the heater core 5 to become warm air, which is then transferred to the hot air outlet 2.
Teal is blown into the cabin from f. Heater Control Lever 8a Once inside the doorway T, both doors 6 and 7 remain fully open and do not move.

(Effects of the Invention) Since the present invention is configured as described above, during maximum cooling, the contact surfaces of the shear mix subdoor and the heater core are brought into close contact with each other by the suction force of the electromagnet, and the sealing performance is significantly improved. . Therefore, there is no risk of the side door seal becoming incomplete due to hysteresis in the opening/closing mechanism of the air mix door and air mix subdoor, which could cause hot air around the heater core to leak into the vent outlet and reduce cooling capacity. This can be prevented. Further, if the heater control lever is provided with an allowance near the maximum cooling position, there is an advantage that the operating force of the lever can be prevented from increasing due to the attraction force of the electromagnet.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a vehicle air conditioner showing an embodiment of the present invention, Fig. 2 is a side view of an air mix sub door opening/closing device of the present invention, and Fig. 3 is a diagram showing the operating position of the heater control lever and the air conditioner. FIG. 3 is a diagram showing the relationship with the opening degree of the mix subdoor. 1... Air conditioner, 4... Evaporator, 5... Heater core, 5b... Electromagnet, 6... Air mix door, 7... ...Air mix subdoor, 7a...Suction member, 8a
...Heater control lever, 8C...
...Switch, C...Maximum cooling position Figure 1 Figure 3 Patent Application No. 94288 2, Name of the invention Vehicle air conditioning system 3, Relationship with the person making the amendment Case Patent applicant address 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Name (313)
) Mazda Motor Corporation Representative Ken Yamamoto - 4, Agent 650 Address Asahi Seimei Sannomiya Building 6, 1-3-11 Sannomiya-cho, Chuo-ku, Kobe, Hyogo Prefecture Subject of amendment (1) Detailed description of the invention in the specification Explanation column (2) Drawing (Figure 2) 7. Contents of amendment (1) "A" next to "Direction" on page 8, line 11 of the specification
join. (2) Correct Figure 2 as shown in the attached sheet. 8. List of attached documents

Claims (1)

[Claims] (1) Vehicle air conditioning in which an air mix door and an air mix sub-door are provided in front and rear of a heater core located downstream of an evaporator so as to be openable and closable, and engine cooling water is constantly flowing through the heater core. In the device, an electromagnet is disposed on at least one of the abutment surfaces of the air mix subdoor and the heater core, and a member attracted to the electromagnet is disposed on the other side, and a switch of the electromagnet is arranged near the maximum cooling position of the heater control lever. An air conditioner for a vehicle, characterized in that it is installed at a position where it is turned on.