JPS61157411A - External combustion type heater - Google Patents

Abstract

PURPOSE:To permit fuel economization by constituting the captioned heater for car heating so that the heater stops operation when either of the inner or outer air temperature becomes over each prescribed value. CONSTITUTION:The car-interior temperature 9 and a car-exterior temperature 10 are input into a controller 12, and compared with the respective set temperatures T1 and T2. When the car-interior temperature 9 is over the set temperature T1 or the car-exterior temperature 10 is over the set temperature T2, the car interior is in humid state, but soon warmed, and then a flow-rate control valve 8 is closed, and the operation of an external combustion type heater 6 is suspended. With such constitution, fuel economization is permitted.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an external combustion type heater that eliminates wasteful fuel consumption.

(Prior Art) Many modern vehicles are equipped with a heater that heats the interior of the vehicle and an air conditioner R (usually called an "air conditioner") that cools and heats the interior of the vehicle. Since engine cooling water is used to heat the cabin, there is no problem with heating the cabin while driving, but in order to heat the cabin before driving, start engine 1 in advance and set the heating mode. You need to put 7 and 1. but,
In the winter season or in cold regions, it is a hassle to warm up the engine in advance, so a heating system that does not rely on engine cooling water is installed, and a timer is set to start heating the engine at the preset time. A vehicle pre-heating system has been proposed in which a device is activated to heat the interior of the vehicle (for example, Japanese Patent Laid-Open No. 57-84212). It is called. - On the other hand, vehicles with spacious interiors called one-box cars are becoming increasingly popular, but such vehicles require large heating capacity and capacity to adequately heat the interior of the vehicle.
Especially in cold regions, where heating capacity tends to be insufficient,
Adoption of the above external combustion type heater is being considered.

Figure 3 shows a heating system for a vehicle that is equipped with an external combustion heater in addition to a conventional heating system that uses engine cooling water. 1 is the engine, 2 is a radiator for dissipating heat from the engine cooling water, and 3
4 is a cooling fan driven by the engine; 4 is a heater core that supplies heating air; and 5 is an aFi external combustion type heater with piping for cooling water.

The external combustion type heater 6 uses gasoline, light oil, etc. as fuel, and can be set at the time of engine startup using a timer (not shown).
At the set time, it will automatically ignite and burn, and the built-in hot water pump will supply hot water to the heater core 4 through 7t of piping.
circulate.

By the way, in an external combustion type heater, when the time set by the timer is reached, the main switch is turned on, the glow plug for igniting the burner is energized, and the control amplifier, hot water pump, fuel supply pump, air supply pump, etc. are activated. Fuel is ignited in the combustion chamber and hot water is circulated through the heater core, which heats the air and blows warm air into the passenger compartment.

The time using a timer is usually set several hours before getting into the vehicle or the night before, so at the actual time the time is set, the weather and solar radiation conditions may differ from what was expected when setting the time. Even though the interior of the vehicle is quite warm, the external i-type heater automatically heats the vehicle, causing a problem of wasted fuel consumption due to unnecessary heating.

(Objects and Structure of the Invention) The present invention has been made in view of the above points, and is intended to reduce the amount of fuel used to operate the external combustion heater, so that one or both of the vehicle interior temperature and the outside temperature are equal to or higher than a predetermined temperature. The system was designed to stop the operation of the external combustion heater.

(Example) The present invention will be explained below based on the drawings.

FIG. 1 is a schematic diagram showing the structure of an embodiment of an external combustion type heater according to the present invention, and the same reference numerals as in FIG. 3 indicate the same components.

In this embodiment, a vehicle interior temperature sensor 9 for detecting the temperature inside the vehicle interior is mounted, for example, on the front of the instrument panel, and an outside temperature sensor 1 for detecting the outside temperature is installed.
0 is attached to the inside of the front grill, for example.

Next, the operation will be explained based on FIG.

The temperature signals of the vehicle interior temperature detected by the vehicle interior temperature sensor 9 and the outside temperature (F-1) detected by the exterior temperature sensor 1O) are amplified by the amplifier 11) and set in the controller 12 to set temperatures T8, T, are compared with each other. Is the vehicle interior temperature higher than the set temperature Ill (for example, 10°C) (F-2)? Is the outside temperature higher than the set temperature Tt (for example, 10°C)?
℃) is too large (F-3), the interior of the vehicle is already warmed up or will warm up soon, so there is no need to operate the external combustion engine, so its operation is stopped (F-4).

Specifically, the flow rate control valve 8 is closed by an operation stop signal from the controller 12. On the other hand, when the temperature inside the vehicle is below the set temperature T1 and the outside temperature is also below the set temperature T, it is necessary to heat the inside of the vehicle, so the external combustion heater is activated at the time set by the timer. let (P
-5).

The set temperatures TI, TI may be fixed in advance, but may be made variable since the comfortable heating temperature inside the vehicle differs from person to person.

(Effects of the Invention) As explained above, in the present invention, the external combustion heater is configured to stop operating when either or both of the vehicle interior temperature and the outside temperature are equal to or higher than a predetermined temperature. When the interior of the vehicle is warm or quickly warms up, there is no wasted fuel consumption by the external combustion heater.

[Brief explanation of drawings]

FIG. 1 is a diagram of a heating system including an external combustion heater according to the present invention, FIG. 2 is a flowchart showing the operation of the external combustion heater according to the present invention, and FIG. 3 is a diagram of a conventional vehicle heating system. . 1...Engine, 2.-Radiator for heat dissipation, 3. -Cooling fan, 4...Heater core, 5-...Piping, 6...
・External combustion type heater, 8...Flow rate control valve, 9...Interior temperature sensor, 10...Outside temperature sensor, 11...Amplifier, 12-...Controller

Claims (1)

[Claims] A temperature sensor detects either or both of the vehicle interior temperature and the outside air temperature, and when either the vehicle interior temperature or the outside air temperature detected by the temperature sensor is equal to or higher than a predetermined temperature value, the external combustion heater is activated. An external combustion type heater characterized by having a controller that stops the heater.