JPH01282013A - Auxiliary-engine-driven type air conditioner - Google Patents

Abstract

PURPOSE:To reduce the frequency of unnecessary cooling operation for enhancing stillness, when it is discriminated that it is night and when it is detected that the outside air temperature is less than a higher set value, by stopping the cooling operation for controlling air auxiliary engine so as not to be driven. CONSTITUTION:Based on respective signals from an outside air temperature sensor 111, an inside air temperature sensor 112, and an inside air temperature setting temperature volume 113, a control unit 160 controls the inside air temperature so that it can be always kept at a set temperature in response to the variation of the outside air temperature. For example, when the outside air temperature is less than 20 deg.C, either the operation M1 to M5 including cooling modes or the operation M6 to M12 not including cooling modes is selected. In this case, in the cooling mode operation, an auxiliary engine is driven; while in the blowing or heating mode, a blower motor is driven. When a night light switch 102 has been turned on, the outside air temperature for carrying out the cooling-mode-including operation is to be such that it is more than a second set temperature, for example, 10 deg.C.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the control of an auxiliary engine-driven air conditioner installed in a pass vehicle, etc., and more specifically to the control of an air conditioner at night in winter. It is related to.

[Conventional technology]

In the conventional auxiliary engine-driven air conditioner for buses, etc., the control of the air conditioning mode is disclosed in Japanese Patent Application Laid-Open No. 57-4617, but the above air conditioning mode control is performed by external control as shown in Fig. 2. Control is performed by the control device 100 so that when the temperature reaches T+C (for example, 5 degrees Celsius) or higher, the air conditioner mode operation including the cooling mode is performed according to a signal from the outside air sensor 111 installed in the vehicle (2). .

[Problem to be Solved by the Invention] However, in the above-mentioned control of the air conditioning motor, even in the winter when the temperature is low, if the outside temperature rises, the auxiliary engine is suddenly activated, the compressor is activated, and the cooling motor starts operating. There are cases. However, at night when the interior of a HAS vehicle is quiet, there is a problem in that the driving sound of the auxiliary engine and the sound of the blow-off switching damper wake passengers up from their long sleep or make them feel uncomfortable.

The present invention was made in view of the above problems, and
Focusing on the fact that even if the temperature rises at night during the winter, there is no sunlight like during the day, it is sufficient to blow air without air conditioning, and shift to a mode that only uses quiet air blowing. The purpose is to control air conditioning equipment.

[Means for Solving the Problems] In order to achieve the two objects, the present invention provides (1) an auxiliary engine-driven air conditioner in which a compressor is operated by an auxiliary engine to perform cooling operation; temperature detecting means for detecting outside temperature; nighttime determining means for determining nighttime; and when the signal from said nighttime determining means is not nighttime, the outside temperature signal from said temperature detecting means is set as a first setting. If the temperature is below the above temperature, the cooling operation is stopped and the auxiliary engine is controlled so that the auxiliary engine is not driven. A control means for controlling the cooling operation to be stopped and the auxiliary engine not to be driven at a temperature below a second set temperature which is at least higher than the set temperature.

(2) Furthermore, it is convenient and desirable that the nighttime discrimination means is based on light blinking at nighttime.

[Effect]

Since the present invention is configured as described above, a signal is sent to the control device by the nighttime discrimination means, and if it is a daytime signal, the outside temperature is set to the first set temperature 'I'1'C (for example, 5 °
C) If the signal is a nighttime signal, the cooling mode operation will not be performed when the outside temperature is below the second set temperature T2°C (for example, lOoC). .

In other words, at night in winter, the outside temperature at which the cooling mode is operated is shifted from TloC to T2°C, compared to during the day, so the outside temperature at night in winter is below ]゛1゛C, j-
Cooling mode operation is not performed even when the temperature is 'F.

The auxiliary engine is activated and shifts to cooling mode 1' operation only when the temperature exceeds °C.

Therefore, the cooling mode operation in which the auxiliary engine is driven is performed less frequently at night in winter than during the day.

〔Example〕

To explain the outline of an auxiliary engine-driven air conditioner installed in a bus vehicle, in Fig. 3, 1 is an auxiliary engine that drives a compressor 2, and gas refrigerant compressed by the operation of the compressor 2 is supplied to the compressor. Condenser 3 having a blower fan 3a from 2
sent to. The liquid refrigerant condensed and liquefied in the condenser 3 is separated into gas and liquid in the receiver 4, and then depressurized in the expansion valve 5 and expanded adiabatically to become a mist refrigerant. 3, it evaporates and at this time takes heat from the surroundings and cools the room. The gas refrigerant evaporated in the evaporator 6 returns to the compressor 2 and is compressed, and the above cycle is repeated to perform cooling mode operation.

On the other hand, in FIG. 3, 11 is a vehicle engine, 12 is a water pump, and the engine cooling water (hot water) heated by the vehicle engine 11 is supplied to
The air is sent to a heater core 13 having a blower fan i3a installed indoors.

The hot water sent to the heater core 13 emits heat to the surroundings by being blown by the blower fan 13a, thereby warming the room. The hot water that has released heat in the heater core 13 further releases heat in the defroster 14, returns to the vehicle engine 11, and is heated when cooling the vehicle engine 11, and the above cycle is repeated to enter the heating mode. Driving takes place.

Next, the control of the above-mentioned air conditioner will be explained in detail of the present invention.

In FIG. 1, 111 is a thermistor-type outside air sensor that detects the outside temperature, 112 is a thermistor-type inside air sensor that detects the room temperature to be air-conditioned, and 113 is a set temperature volume that changes the air conditioning temperature of the room. The signals from the outside air sensor 111 and the inside air sensor 112 are sent to the control device 100.
Based on the signal from the controller, the room temperature is controlled to always maintain the set air conditioning temperature despite fluctuations in outside temperature. That is, as shown in the figure, according to each temperature range of outside temperature compensation, for example, when the outside temperature is 20°C or less, operation that includes cooling mode (M1 to M12) or operation that does not include cooling mode (M6 to M12) is performed. M1 to M12 or M6 to M1 to maintain the set air conditioning temperature.
Mode 1' is selected between 2 and air conditioning control is performed. Here, cooling mode operation is performed by engine rotation control, so the auxiliary engine is driven, but air blowing and heating mode operation is performed by blower motor air volume control, so the auxiliary engine is not driven and is driven every time the blower motor operates. . In addition, in the cooling mode 1" (Ml~M5) and the air blower M6, air is blown from the ceiling, and in the heating mode (M8~M12)
The air blower M7 is designed to blow air from above the floor. Reference numeral 102 designates a night light switch. When this light switch 102 is turned on, operation including cooling mode is performed when the outside temperature is higher than the second set temperature T2°C (for example, 10"C), and the light switch 102 is turned on. If the cooling mode is not turned on, the temperature at which operation including the cooling mode is performed will be the first set temperature T1°, which is the conventional set temperature shown in Fig. 2.
C (for example, 5° C.) or higher.

Next, regarding the control of the air conditioning mote of the air conditioner according to the present invention, how the air conditioning mote is controlled depending on the outside temperature and whether it is day or night will be explained using the flowchart shown in FIG.

First, in step 201, it is determined whether the outside temperature has increased. If the outside temperature has increased, it is determined in step 202 whether to turn on or off the light switch at night. If the light switch is ON (that is, at night), it is determined in step 203 whether the reset switch is ON or OFF, and if the reset switch is OFF, the outside temperature is determined in step 204.

Here, the outside temperature is set to the second set temperature of 1-2°C (for example, 1
0°C) or above, select operation including cooling mode in step 206 (M1 to M12 in Figure 1), and if the outside temperature is below T2°C, select operation including cooling mode in step 2°7. (M6 to M12 in FIG. 1). However, if the light switch is OFF in step 202 (that is, during the daytime) and the reset switch is ON in step 203, the process moves to step 205 to determine the outside temperature. The outside temperature is the first set temperature 'T'', '
c (e.g. 5°C) or lower, follow Step 2 above.
Select operation that does not include cooling mode in 07, and when the outside temperature is
If the temperature is 1°C or higher, the operation including the cooling mode in step 206 is selected.

Next, regarding the air conditioning mode 1 control described above, its operation is changed to the fifth mode.
This will be explained using the electric circuit shown in the figure.

In FIG. 5, 101 is a power switch, 102 is a night light switch, and 103 is a reset switch.

104 is a starter relay having contacts 104a, 105
106 is contact 1.
Water pump relay with 06a, 107b contact 1
Fuel with 07a!・It is a relay. The above light switch 102, reset switch 103, starter relay 104, blower relay 105, water pump relay 106, and fuel cant relay 107 are connected to the control device 10.
0 as shown in the figure, and an outside air sensor 111, an inside air sensor 112, and a set temperature regulator 113 are also connected to the control device 100. 121 is a power supply battery, 1
22 is a starter, 123 is a valve, 124 is a meter pump motor, 125 is a fuel cant hub for the auxiliary engine 1, and each of the relay contacts 104a, 10
5a, 106a, and 107a are connected as shown in the figure to form an electric circuit.

Next, the operation of the electric circuit having the above configuration will be explained. First, when the power switch 101 is turned on, if the outside temperature is higher than the first set temperature T1°C (for example, 5°C), the control device 100 is activated by the signal from the outside air sensor 111 to select the cooling mode 1-. Starter relay 104 and fuel cant relay 107 are energized and contacts 104a and 107a are closed, so starter 122 is driven and fuel cup 1-valve 1
25 opens to start the auxiliary engine 1, which activates the compressor 2 and begins cooling mode operation.

Here, if the night light switch 102 is turned on,
The control device 100 is activated by a signal indicating that it is night time.
Since only the blower relay 105 is energized and the contact 105a is closed, the blower motor 123 is operated and the blower mode operation is performed, and the outside temperature is lowered to the second set temperature T2°C (for example, 1°C).
Cooling mode operation is not performed until the temperature reaches 0°C or higher.

However, even if it is nighttime, that is, even if the light switch 102 is closed, if you want to operate the air conditioning mode in the same way as during the daytime, turning on the reset switch 103 will change the signal to indicate that it is daytime, and the control device 100 will operate to set it. Since the temperature returns to the first set temperature TI'C (for example, 5"C), the frequency of cooling mode operation increases even at night.

In addition, when the light switch 102 is not closed, the outside temperature is below the first set temperature T,'c, and when the light switch 102 is closed, the outside temperature is below the second set temperature 'r2°C. Control device 100 operates to energize blower relay 105 and walk pump relay 106, contacts 105a and 106a close to operate blower motor 123, and water pump 12 circulates heated cooling water (warm water) of vehicle engine 11. meter bomb motor 1
24 is activated to perform the heating mode operation, or only the blower relay 105 is energized and only the contact 105a is closed, and the blower 123 is activated to perform the ventilation mode operation.

In addition, in the above, since the starter relay 104 and the fuel cut relay 107 are energized, the starter 12
2 is not operating and the fuel cant valve 125 is closed, the auxiliary engine 1 is not driven and no cooling operation is performed.

Next, in this embodiment, a nighttime light switch was used as a nighttime discrimination means for determining nighttime, but instead of a light switch, a solar radiation sensor or a digital clock was used to discriminate between day and night, and the signal By inputting this into the control device, the air conditioning mote can be controlled in the same manner as described above.

In this embodiment, a thermistor-type outside air sensor was used as the detection means for detecting the outside temperature, but a thermocouple type or a thermal expansion coefficient such as mercury may be used instead of the thermistor type, or the first Two temperature switches may be used, each operating at a second contact temperature.

In addition, although this embodiment describes the case where it is applied to a lotus vehicle, it can also be applied to a vehicle in which the compressor is activated by the drive of the auxiliary engine to perform cooling mode operation, thereby cooling the passenger compartment. It is something.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

(1) Since cooling mode operation is performed less frequently at night during winter, cooling mode operation reduces the frequency of occurrence of the driving sound of the auxiliary engine and the blowout switching damper sound, making the room quieter.

(2) By using the already installed night light switch as a means for determining night time, there is no need to install a new means for determining night time, and the driver can turn on the light switch intuitively, ensuring that night time is detected. It is determined.

[Brief explanation of the drawing]

Fig. 1 is an air conditioning mode control operation diagram showing an embodiment of the present invention, Fig. 2 is a conventional air conditioning mode control operation diagram, Fig. 3 is an air conditioning cycle diagram, and Fig. 4 is an embodiment of the present invention. Air conditioning mode control flowchart 1. FIG. 5 is an electrical circuit diagram of a main part showing an embodiment of the present invention. 1... Auxiliary engine, 100... Control device, 102
...Nighttime discrimination means, 111...Temperature detection means.

Claims (2)

[Claims] (1) In an auxiliary engine-driven air conditioner in which a compressor is operated by the drive of an auxiliary engine to perform cooling operation, the system comprises: a temperature detection means for detecting outside temperature; a nighttime determination means for determining nighttime; When the signal from the discrimination means indicates that it is not nighttime, the cooling operation is stopped and the auxiliary engine is controlled so that the auxiliary engine is not driven when the outside temperature signal from the temperature detection means is below the first set temperature, and the nighttime discrimination means When the first signal is at night, the outside temperature signal from the temperature detection means is the first signal.
An auxiliary engine-driven air conditioner comprising: control means for controlling the cooling operation so that the auxiliary engine does not operate by stopping the cooling operation at a temperature below a second set temperature that is at least higher than the set temperature of the auxiliary engine. (2) The auxiliary engine-driven air conditioner according to claim 1, wherein the nighttime discrimination means is a nighttime light switch.