JPS642808Y2 - - Google Patents

Description

[Detailed explanation of the idea] (b) Industrial application fields This invention relates to a vehicle air conditioner.

(b) Technical background and problems In a conventional vehicle air conditioner, the installation of a temperature sensor that detects the temperature of internal combustion engine cooling water as a heat medium introduced into a heater core as a heat exchanger is shown in Figure 1, for example. There was something that was done as shown below. (Refer to Japanese Utility Model Application No. 54-109247.) That is, a case 1 of a heater unit forming an air passage is provided with an inlet 2 and outlets 3, 3. A heater core 5 as a heat exchanger is provided in the air passage 4 of this case 1. A heater core tank 6 is provided on the side of the heater core 5, and the heater core tank 6 is supported within a recess 7 provided in the side wall of the case body 1. Furthermore, this heater core tank 6
An inflow pipe 8 and an outflow pipe 9 for cooling water, which communicate with the water jacket of the internal combustion engine, are connected to the inflow pipe 8, and a temperature sensor 10 is attached to the middle of the inflow pipe 8 via an attachment 10a.

Therefore, the temperature of the cooling water in the inflow pipe 8 can be detected, and the detection result can be used for controlling the amount of cooling water supplied to the heater core 5, etc.

However, in such a conventional structure, since the heat-sensitive part of the temperature sensor 10 is exposed to the inside from the outside of the inflow pipe 8, it is necessary to drain the cooling water once when replacing the temperature sensor 10, which makes the work difficult. There was a risk that it would become extremely complicated. Further, there is a problem in that the attachment 10a and the inflow pipe 8 must be waterproofed.

(c) Purpose of the invention This invention was made by focusing on the problems of the conventional technology. The purpose is to provide a harmonization device.

(d) Example An example of this invention will be described below with reference to FIGS. 2 to 4.

As shown in FIG. 2, the heater unit A of the vehicle air conditioner has a case 11.
The interior thereof is formed as an air passage 12, and a suction port 13 is provided at one end of the air passage 12. Moreover, the other end of the case 11 is provided with an air outlet 14 that communicates with the interior of the vehicle via a duct. Further, in the air passage 12 of the case 11, a heater core 1 serving as a heat exchanger for exchanging heat with the air in the air passage 12 is provided.
5 is provided. A heater core tank 16 is integrally provided on one side of the heater core 15 as shown in FIG.
It is supported by a recessed part 19 provided at 8.

Further, the side wall 1 corresponding to this concave portion 19
8 is provided with a mounting hole 20, and the urethane foam 17 facing this mounting hole 20 is provided with a through hole 21.
is drilled. A female thread 22 is formed on the inner peripheral surface of the mounting hole 20, and a temperature sensor 23 is screwed into and fixed to this female thread 22.

This temperature sensor 23 has a male thread 25 and a knurled knob 26 on the outer peripheral surface of its sensor body 24, and the heater core tank 1 at the tip.
A heat sensitive part 27 is provided which comes into contact with the outer surface of 6. The outer surface of this heater core tank 16 constitutes the outer surface of a side wall whose inner surface is in contact with cooling water of an internal combustion engine (not shown) serving as a heat medium. In addition, the sensor body 2
A harness coupler 28 is provided at the end of the sensor harness 4, and a sensor harness connector (not shown) is connected thereto. Furthermore, a lock nut 29 whose outer peripheral surface is knurled is screwed into the male threaded portion 25 of the sensor body 24.

Next, the effect will be explained.

The temperature sensor 23 is assembled by inserting the tip of the sensor body 24 into the mounting hole 20 of the side wall 18, and then tightening the male threaded portion 2.
5 into the female thread 22. In this state, heat sensitive part 2
7 is in contact with the outer surface of the heater core tank 16. In this case, since the heater core 15 including the heater core tank 16 is supported by the case 11 via the urethane foam 17, there is a large dimensional error during installation.
Although the distance from the side wall 18 is not constant, the internal thread 22
By adjusting the amount by which the male threaded portion 25 is screwed in, the heat sensitive portion 27 can be brought into proper contact with the outer surface of the heater core tank 16.

Then, by tightening the lock nut 29, the temperature sensor 23 is attached to the case body 11 while keeping the heat sensitive part 27 in contact with the outer surface of the heater core tank 16.
can be fixed to. A sensor harness connector (not shown) is connected to the harness coupler 28 . In this state, the temperature of the cooling water in the heater core tank 16 can be detected from its outer surface by the heat sensing section 27, and the detection result can be used for controlling the amount of cooling water supplied to the heater core 15, etc.

(e) Effect of the invention As is clear from the above, according to the configuration of this invention, the temperature sensor is supported in the case, and the heat-sensitive part of the temperature sensor is placed on the outer surface of the side wall of the heat exchanger whose inner surface is in contact with the heat medium. Since it is brought into contact with the temperature sensor, the temperature of the heat medium can be detected, but there is no need to remove the heat medium when replacing the temperature sensor, making the work easier, and there is no need to take waterproof measures when installing the temperature sensor.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional heater unit, Figs. 2 to 4 show an embodiment of this invention, Fig. 2 is a perspective view, and Fig. 3 is a
FIG. 4 is a partially enlarged sectional view taken along the line, and is a perspective view of the temperature sensor. 11... Case, 12... Air passage, 15...
Heater core (heat exchanger), 16... Heater core tank (outer surface of side wall of heat exchanger), 23... Temperature sensor, 27... Heat sensitive section.

Claims (1)

[Scope of utility model registration request] A heater core is provided in a case forming an air passage and exchanges heat with the air in the air passage when supplied with a heat medium, and the heater core tank is supported in a recessed part of the case via a heat insulating material. In the air conditioner for a vehicle, a screw hole is formed in the side wall of the case recess, and a temperature sensor is screwed into the screw hole until the tip heat-sensing part comes into contact with the outer wall of the heater core tank. air conditioning equipment.