JPS6111809B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a mode switching device for a heating and cooling system for an automobile. Conventionally, mode switching devices have been operated by operating a lever, and the mode has generally been displayed depending on the operating position of the lever, which has not been considered smart in terms of appearance. Furthermore, it is necessary to mechanically connect the operating section and the actuating section, and conventionally such connection has been accomplished with a wire. However, if the wire is long or if it is bent suddenly, the sliding resistance will make the operation difficult, which will not only deteriorate the operability, but also put strain on the operating section, deteriorating its durability. Therefore, the positions of the operating portion and the actuating portion are restricted, which also imposes restrictions on the design of the vehicle interior. The present invention provides a mode switching device in which the operation section is composed of one push button, the mode is sequentially switched each time the push button is pressed, and the mode can be displayed using lamps. The present invention will be explained in detail below according to an illustrated embodiment. In FIG. 1, 1 is an outside air inlet, 2 is an inside air inlet, and 3 is a switching damper that selectively switches between the outside air inlet 1 and the inside air inlet 2.
is normally biased to close the inside air inlet 2 by the action of a spring within the negative pressure actuator 4. The negative pressure actuator 4 operates with negative pressure derived from the negative pressure source of the engine when the solenoid valve 5 is turned on.
The damper 3 is switched to the outside air introduction port 1 closed position as shown by the broken line in the figure. 6 is an evaporator of the cooling device, 7 is a heater core of the heating device, and 8 is a temperature control door (mix door). 9 is a center outlet, 10 is a heater outlet, 11
is a differential air outlet, and each air outlet 9, 10, 11
Opening/closing dampers 12, 13, and 14 are provided. These dampers 12, 13, and 14 are opened by negative pressure actuators 15, 16, and 17, respectively, when solenoid valves 18, 19, and 20 are turned on. In this embodiment, the switching modes include the following six types in addition to the off mode. (1) Inside air cooler that operates the compressor (Comp.) of the cooling system in the inside air circulation (Circ) state and blows cold air from the center outlet to the occupant's chest (Center) (2) In the outside air introduction (Fresh) state An outside air cooler (3) that operates the compressor (Comp.) of the cooling system and blows cold air from the center outlet to the occupant's chest (Center). Ventilation (4) The compressor (Comp.) of the air conditioner is operated in the outside air intake (Fresh) state, and the temperature control door and heater are operated by the temperature control device to blow cold air to the chest ( Bi-level (5) which blows out warm air to the feet (Heat) from the center) Bi-level (5) When outside air is introduced (Fresh), the temperature control device operates the temperature control door and heater to blow out warm air to the feet (Heat). 6) In the outside air intake (Fresh) state, the temperature control device operates the temperature control door and heater to blow warm air to the windshield (Def) to prevent fogging. 1 shows an operation unit of a mode switching device according to the invention,
The entire screen becomes a display surface, and one automatic return type push button switch 21 is provided at this corner. Display is by lamp (or light emitting diode), Car (picture of a car),
It is performed using a combination of Fresh, Circ., Comp., Center, Heat, and Def. In FIG. 3, 21 is a push button switch (bipolar switch) for mode change operation, and 22 is an engine key switch. The logic signal is S in the table below.
When you release your hand (contact R), the logic signals of each part are inverted as shown in R in the table below.

[Table] Therefore, each time the push button switch 21 is pressed, the logic signal "1" is output from the F point of the flip-flop circuit 23.
is output and the daycade counter divider 24
is input to the clock terminal of The decade counter divider 24 has output terminals 0 to 9, and a logic signal "1" is output to the clock terminal.
The frequency is divided so that the logical signal "1" that was output from the output terminal of n is output from the output terminal of n+1 every time . Logic signals "1" are sequentially outputted to the output terminals of 6. The output terminals 1 to 6 of the counter divider 24 are connected to a diode matrix circuit 26 via a transistor switch circuit (inverter) 25, respectively.
It is connected to each input terminal _M1 to _M6 of. Therefore,
n of the counter divider 24 (n=1,......
When a logic signal "1" appears at the output terminal of 6), the transistor Tr ₁ of the corresponding inverter 25
turns on, the output at point G becomes a logic signal “0”, and the input terminal of the diode matrix circuit 26
Logic signal “0” is input to Mn, that is, the corresponding terminal Mn
only is grounded. Input terminal M ₁ of diode matrix circuit 26
are connected to output terminals Ma, Mc, Md, Me through diodes D ₁ a, D ₁ c, D ₁ d, D ₁ e, and input terminal M ₂
are connected to output terminals Ma, Mb, Md, Me through diodes D ₂ a, D ₂ b, D ₂ d, D ₂ e, and input terminal M ₃
is the output terminal via diodes D ₃ a, D ₃ b, D ₃ e
Connected to Ma, Mb, Me, input terminal M ₄ is connected to output terminal through diode D ₄ a, D ₄ b, D ₄ d, D ₄ e, D ₄ f
Connected to Ma, Mb, Md, Me, Mf, input terminal
_M5 is the output terminal via diodes _D5a , _D5b , _D5f
The input terminal M ₆ is connected to the output terminals Ma, Mb, Mf through the diodes D ₆ a, D ₆ b, D ₆ g.
Connected to Mg. Output terminal Ma of diode matrix circuit 26
is connected to the Car display lamp 27, and the output terminal
Mb is connected to the Fresh display lamp 28, and the output terminal Mc is connected to the Circ. display lamp 29 and the solenoid valve 5 for operating the negative pressure actuator 4 of the internal/external air switching damper 3.
The output terminal Md is connected to the Comp. display lamp 30 and the electromagnetic clutch 34 of the air conditioner compressor, and the output terminal Me is connected to the Center display lamp 31 and the negative pressure actuator 15 of the damper 12 for opening and closing the center air outlet 9. The output terminal Mf is connected to the heat display lamp 32 and the solenoid valve 19 for operating the negative pressure actuator 16 of the damper 13 for opening and closing the heater outlet 10, and the output terminal Mg is connected to the def display lamp 33. and a negative pressure actuator 17 for the damper 14 for opening and closing the differential air outlet 11
It is connected to the operating solenoid valve 20. Note that each output terminal M ₁ to _{M 6} of the diode matrix circuit 26 is connected to the lamps 27 to 33 and the solenoid valves 5 and 1.
When connecting to 8 to 20, etc., use the Car display lamp 3.
As shown in example 1, this is done via a transistor switch circuit (inverter) 35. Particularly in the case of lamps, a voltage adjustment circuit 37 with a light switch 36 (manual or linked to a light switch) is attached, and the light switch 36 is turned on during the day.
It is a good idea to turn off the lights so that they are brighter than at night. Next, the effect will be explained. Now, if we assume that the logic signal "1" is output from the 0 output terminal of the counter divider 24, this output terminal is only grounded, so the lamps and solenoid valves etc. do not operate and are in the OFF mode. It is becoming. From this state, when the push button switch 21 is pressed once, the logic signal "1" is input once to the clock terminal of the counter divider 24, and the state shifts to a state where the logic signal "1" is output from the output terminal of the counter divider 24. Therefore, a logic signal “0” is inputted to the input terminal M ₁ of the diode matrix circuit 26 via the inverter 25 . This results in diodes D ₁ a, D ₁ c, D ₁ d, D ₁ e
A logic signal "0" appears on the output terminals Ma, Mc, Md, and Me via the Car display lamp 27 and Circ.
Display lamp 29, Comp. display lamp 30,
The center display lamp 31, the solenoid valves 5 and 18, and the compressor solenoid clutch 34 are activated. Taking this as an example of the Car display lamp 27, the transistor Tr ₂ of the inverter 35 is turned OFF and the output at the H point becomes a logic signal "1", and this signal turns the lamp operating transistor Tr ₃ ON and the lamp 27 is turned OFF. Activate. In this way, the solenoid valves 5 and 18 are opened, the negative pressure actuators 4 and 15 operate the dampers 3 and 12, the outside air inlet 1 is opened, the inside air inlet 2 is opened, the center outlet 9 is opened, and the air conditioner is cooled at the same time. The compressor for the device is driven, and the inside air introduced from the inside air inlet 2 is heat-exchanged by the evaporator 6 to become cold air, and the cold air is blown out from the center air outlet 9 toward the chest of the passenger. And lamps 27, 29, 30, 3
Circ., Comp., Center in the picture of Car according to 1.
is displayed to indicate that it is in internal air cooler mode. At this time, a temperature control device (not shown) detects the difference between the set temperature and the temperature inside the vehicle, and operates the temperature control door 8 and heater core 7 to maintain the temperature inside the vehicle at the set temperature. This operation is performed in all modes below. When the push button switch 21 is pressed once more, the logic signal "1" is output from the output terminal 2 of the counter divider 24, and the inverter 2
A logic signal "0" is input to the input terminal _M2 of the diode matrix circuit 26 through the input terminal M2. As a result, a logic signal "0" appears at the output terminals Ma, Mb, Md, and Me via the diodes D ₂ a, D ₂ b, D ₂ d, and D ₂ e, and the signals for Car, Fresh, Comp., and Center display appear. Lamps 27, 28, 30, 31, solenoid valve 18 and compressor solenoid clutch 34 are activated. Therefore, the solenoid valve 5 is closed from the previous state, and the inside air inlet 2 is returned to the closed state, so that the outside air led from the outside air inlet 2 is heat-exchanged by the evaporator 6 to become cold air, and the cold air is sent to the center outlet 9. Make it blow out. And in the picture of Car, Fresh, Comp.
The Center lamp is displayed to indicate that it is in outside air cooler mode. When the push button switch 21 is pressed once more, the logic signal "1" is output from the output terminal 3 of the counter divider 24, and the inverter 2
A logic signal "0" is inputted to the input terminal _M3 of the diode matrix circuit 26 via M3. As a result, “0” appears at the output terminals Ma, Mb, and Me via the diodes D ₃ a, D ₃ b, and D ₃ e, and Car,
Fresh, Center display lamps 27, 28, 31 and solenoid valve 18 operate. Therefore, outside air is introduced and blown out from the center air outlet 9, and at the same time Fresh,
Center is displayed as a lamp to indicate that it is in ventilation mode. When the push button switch 21 is pressed once more, the logic signal "1" is output from the output terminal 4 of the counter divider 24, and the inverter 2
A logic signal "0" is inputted to the input terminal _M4 of the diode matrix circuit 26 via M4. As a result, "0" appears at the output terminals Ma, Mb, Md, Me, and Mf via the diodes D ₄ a, D ₄ b, D ₄ d, D ₄ e, and D ₄ f, and Car, Fresh, and Comp. , Center, Heat
The indicator lamps 27, 28, 30, 31, 32, the solenoid valves 18, 19, and the compressor solenoid clutch 34 are activated. Therefore, the solenoid valve 19 is opened together with the center outlet 9, and the damper 13 is actuated by the negative pressure actuator 16 to open the heater outlet 10. At the same time, the compressor for the air conditioner is operated, and furthermore, the temperature control (not shown) is activated. The device operates the temperature control door 8 and the heater core 7, and when outside air is introduced, cold air is sent from the center outlet 10 to the chest, and warm air is sent to the heater outlet 1.
Let it blow out from 0 to your feet. Then, the Fresh, Comp., Center, and Heat lamps are displayed in the Car picture to indicate that it is in bi-level mode. When the push button switch 21 is pressed once more, the logic signal "1" is output from the output terminal 5 of the counter divider 24, and the inverter 2
Logic signal "0" is inputted to the input terminal _M5 of the diode matrix circuit 26 via M5. As a result, “0” appears at the output terminals Ma, Mb, and Mf via the diodes D ₅ a, D ₅ b, and D ₅ f, and Car,
The Fresh and Heat display lamps 27, 28, and 32 and the solenoid valve 19 operate. Therefore, the temperature control door 8 and the heater core 7 are operated by a temperature control device (not shown), the outside air is heated by the heater core 7, and the warm air is sent to the heater outlet 1.
Speech bubbles from 0 to the feet, and at the same time inside the Car picture.
The Fresh and Heat lamps are displayed to indicate the heater mode. When the push button switch 21 is pressed once more, the logic signal "1" is output from the output terminal 6 of the counter divider 24, and the inverter 2
A logic signal "0" is inputted to the input terminal _M6 of the diode matrix circuit 26 via M6. As a result, “0” appears at the output terminals Ma, Mb, and Mg via the diodes D ₆ a, D ₆ b, and D ₆ g, and Car,
The Fresh and Def display lamps 27, 28, 33 and the solenoid valve 30 for operating the negative pressure actuator 17 of the damper 14 for opening and closing the differential air outlet 11 are operated. Therefore, the temperature control door 8 and the heater core 7 are operated by a temperature control device (not shown), the outside air is energized by the heater core 7, and the warm air is sent to the differential air outlet 11.
It blows air out to the windshield, and at the same time, a lamp indicating Fresh and Def is displayed in the Car picture to indicate that it is in differential mode. When the push button switch 21 is pressed once more, the logic signal "1" is output from the 7 output terminal of the counter divider 24, but since this terminal is connected to the clear terminal, the logic signal "1" is output from the 0 output terminal. ” is output. Therefore, it returns to off mode and all lamp displays including the Car picture disappear. In this way, each time the push button switch 21 is pressed, the mode changes in the following order: off -> internal air cooler -> outside air cooler -> ventilation -> bi-level -> heater -> differential -> off. In this embodiment, the power terminal of the counter divider 24 is directly connected to the battery without going through the key switch 22, so even if the key switch 22 is turned off, the counter divider 24 is maintained in the state before it was turned off. For example, if the engine is operating in the outside air cooler mode, even if the key switch 22 is turned off, the engine can be restarted in the outside air cooler mode. In addition, the power terminal of the counter divider 24 is connected to the battery via the key switch 22, and the power terminal is connected to the clear terminal via the capacitor, so that when the key switch 22 is turned from OFF to ON, the power terminal of the counter divider 24 is connected to the battery. By inputting a clear signal, you can always start from off mode. As explained above, according to the present invention, it is extremely easy to switch modes, it is easy to determine the switching position, and since the operating part and the actuating part can be separated because they are based on electrical signals, there are no restrictions on the mounting position of the operating part. This increases the flexibility in cabin design.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, FIG. 1 is a schematic sectional view showing the operating section of the mode switching device according to the present invention, FIG. 2 is an external view showing the operating section of the same device, and FIG. 3 is the same as above. FIG. 3 is a control circuit diagram of the device. 1...Outside air inlet, 2...Inside air inlet, 3,1
2, 13, 14...damper, 4, 15, 16, 1
7... Negative pressure actuator, 5, 18, 19, 2
0...Solenoid valve, 6...Evaporator, 7...Heater core, 9...Center outlet, 10...Heater outlet, 11...Push button switch, 24...Decade counter deviter, 26...Diode matrix Circuits, 27-33... Lamp, 34... Compressor electromagnetic clutch.

Claims (1)

[Claims] 1. An automatic reset type push button switch and a counter divider that counts the ON-OFF signal of the push button switch and divides the frequency into the number of modes are provided, and each output terminal of the divider is connected to the air conditioning equipment and the air conditioner through a diode matrix circuit. A mode switching device for an automotive air conditioning system, characterized in that it is connected to a damper operating device and an operating state display device.