JPS6233601Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention is used in an automobile air conditioner to prevent a temperature sensor that detects the temperature of air passing through an evaporator from being affected by heat radiation from a heater core.

Conventionally, in automotive air conditioners, the temperature of air passing through an evaporator has been detected in order to control the temperature by moving an air mixer door. That is, the temperature sensor 14 is provided downstream of the evaporator 6 provided in the air conditioning case 5 and up to the heater core 7. This temperature sensor 1
4 is affected by heat radiation from the heater core 7,
It had a defect that the temperature of the air passing through the evaporator 6 could not be accurately detected.

For this reason, the purpose of this invention was to prevent the temperature sensor from being affected by thermal radiation, and its feature is that a shielding plate is provided downstream of the temperature sensor and up to the heater core. The plate prevents heat radiation from the heater core and eliminates the influence from the heater core, thereby achieving the above object.

Examples of this invention will be described below with reference to the drawings.

In FIG. 2, an automotive air conditioner is shown,
Either one of the inside air port 1 and the outside air port 2 is opened depending on the position of the inside/outside air switching door 3, and inside air or outside air is introduced into the air conditioning case 5 via the blower 4 and sent to the downstream side. An evaporator 6 for cooling air is disposed on the downstream side of the blower 4, and a heater core 8 is disposed on the downstream side of the evaporator 7.
The air that has passed through the evaporator 6 is transferred to the heater core 7
The air is divided into those that pass through the heater core 7 and those that bypass the heater core 7 depending on the opening degree of the air mix door 8 provided in front of the air mixer. It is blown into the vehicle interior, and further blown out from the defrost outlet 13 by opening and closing the defrost door 12.

In such an automotive air conditioner, the temperature of the blown air is controlled by controlling the opening degree of the air mix door 8. For this purpose, a temperature sensor is installed downstream of the evaporator 6 up to the heater core 7. 14 are provided.

The temperature sensor 14 is a heat-sensitive element such as a thermistor, and detects temperature as a change in resistance value. This temperature sensor 14 protrudes from the air conditioning case 5, and its height A is approximately 5 cm to 7 cm. Shielding plate 15
is downstream of the temperature sensor 14 and the distance B is 2 cm to 3 cm.
The height C is about 7cm to 9cm. This shielding plate 15 is shown enlarged in FIGS. 3 to 5, and consists of a mounting lid 16 for integrating with the air conditioning case 5, and a shielding plate 17 erected on the mounting lid 16. An air ventilation portion 18 is formed in the shielding plate 17 to prevent ventilation resistance.

The shielding plate 15 is attached by fitting the mounting cover 16 into the mounting hole 19 drilled in the air conditioning case 5, and then screwing the screw 20 into the air conditioning case 5.

As described above, according to this invention, the temperature sensor is protected from heat radiation from the heater core by the shielding plate. Moreover, the shield plate is separated downstream from the temperature sensor, and the shield plate has an air passage through which the air flowing around the temperature sensor passes. It is possible to accurately detect the air temperature without
It is possible to reduce ventilation resistance.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of a conventional automobile air conditioner;
Figure 2 is a configuration diagram of the automotive air conditioner of this invention.
3 is an enlarged sectional view of the main part of this invention, FIG. 4 is a view seen from the direction of arrow A in FIG. 3, and FIG. 5 is a view seen from the direction of arrow B in FIG. 3. 6... Evaporator, 7... Heater core, 14
... Temperature sensor, 15 ... Shielding plate, 18 ... Air vent.

Claims (1)

[Scope of utility model registration request] In an air conditioner for an automobile, an evaporator is disposed on the upstream side, a heater core is disposed downstream of the evaporator in an air conditioning case, and a temperature sensor is provided downstream of the evaporator to detect the temperature of the air passing through the evaporator. A shielding plate for preventing heat radiation from the heater core to the temperature sensor is provided between the heater core and the temperature sensor, and the shielding plate is formed with an air passage through which air flowing around the temperature sensor passes. Automotive air conditioner.