JPH0648164A - Evaporator device for air conditioner - Google Patents

Abstract

PURPOSE:To heighten the strength of a thermistor holder and fit an evaporator thermistor firmly and easily so as to make the temperature control of the evaporator thermistor correct to avoid the freezing of an evaporator, thereby preventing the lowering of cooling capacity. CONSTITUTION:Two refrigerant passage plates 8 positioned at the center part of an evaporator 1 are partially extended in the plate face direction, and a thermistor holder 13 for holding an evaporator thermistor 10 is formed at this extended part. The thermistor holder 13 is thereby provided integrally at the refrigerant passage plates 8, so that the strength of the thermistor holder 13 can be enhanced, and the fixing of the evaporator thermistor 10 can be made firm. As a result, the temperature of the evaporator thermistor 10 is controlled correctly, and the lowering of cooling capacity can be suppressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner evaporator device which can be used in an air conditioner of an automobile.

[0002]

2. Description of the Related Art An automobile is equipped with an air conditioner (air conditioner) in which a heating device and a cooling device are combined in order to adjust the temperature and humidity of the air inside the vehicle to make the vehicle interior comfortable. Many. The air conditioner of this air conditioner is
It is roughly composed of an evaporator, a compressor, a condenser, etc., and circulates a refrigerant in a circuit connecting them to exchange heat to cool the air in the vehicle interior.

The evaporator of such a cooling device is for exchanging heat between the refrigerant pressure-fed by the compressor and the air in the passenger compartment or the like. Normally, the evaporator is arranged on the passenger compartment side in a layout as shown in FIG. It is set up. That is, as shown in the figure, the evaporator 1 has an evaporator case 2
The evaporator case 2 is connected to an inside / outside air box 4 having an inside / outside air switching damper 3, and the other side is provided with a blower fan 5 and a heater core (not shown). It is connected to the air mix chamber 6. Reference numeral 7 is a blower motor that drives the blower fan 5.

The blower fan 5 driven by the blower motor 7 blows out the heat-exchanged cooling air into the passenger compartment. In the figure, arrow A indicates outside air, arrow B indicates inside air, and arrow W indicates cooling air.

Further, the evaporator 1 is roughly constituted by a refrigerant passage plate 8 through which a gas refrigerant flows and an evaporator fin 9 arranged between the refrigerant passage plates 8 as shown in FIG. An evaporator thermistor 10 is attached to the evaporator 1 to prevent the evaporator fins 9 and the like from frosting or freezing.

That is, when the temperature of the refrigerant in the evaporator 1 drops to 0 ° C. or less, frost or ice adheres to the evaporator fins 9 and the like, which lowers the cooling capacity. Therefore, when the evaporator thermistor 10 is attached and the refrigerant temperature drops. Aims to increase the amount of heat generated by increasing the current flowing through the heating element to avoid problems such as marbling and freezing.

As shown in FIG. 6, the evaporator thermistor 10 is attached by sandwiching the evaporator thermistor 10 with a thermistor holder 11 and inserting the thermistor holder 11 into an evaporator fin 9.

As a cooling unit, Shokai Sho
Some are disclosed in Japanese Laid-Open Patent Publication No. 64-26515. What is disclosed in this publication is an evaporator in a unit case,
In a cooling unit equipped with a thermistor that detects the temperature of the air that has passed through the evaporator, the thermistor has a connector, the unit case has a hole for inserting the thermistor, and the connector is fixed in this hole to fix the thermistor to the evaporator. It is arranged downstream of the.

[0009]

In the prior art described above, the evaporator thermistor was mounted by inserting the thermistor holder holding the evaporator thermistor into the evaporator fin, so that the evaporator fin improves the heat dissipation. In order to achieve this, it has been made thinner and the heat dissipation area has been made wider, so that it is difficult to firmly attach the thermistor holder to the evaporator fin, and this operation requires skill.

In the cooling unit disclosed in Japanese Utility Model Publication No. 64-26515, the connector of the thermistor is fixed, but the thermistor itself is free, so it is described in the subject of the present invention. Thus, the evaporator thermistor may come into contact with the evaporator fin.

The present invention has been made in order to solve the above-mentioned conventional problems. By integrally providing a thermistor holder for holding an evaporator thermistor in a part of the refrigerant passage plate, the strength of the thermistor holder can be increased. It is an object of the present invention to provide an evaporator for an air conditioner in which an evaporator thermistor is firmly attached and the cooling capacity is not deteriorated.

[0012]

As a means for solving the above-mentioned problems, the present invention is configured so that a part of two refrigerant passage plates in the central portion of an evaporator is extended in the plate surface direction and It is characterized in that a thermistor holder for holding the evaporator thermistor is formed in the installed portion.

[0013]

According to the present invention, a part of the two refrigerant plates in the central portion of the evaporator is extended in the plate surface direction, and the thermistor holder for holding the evaporator thermistor is formed in the extended portion. The thermistor holder for holding the thermistor can be integrally provided on the refrigerant passage plate. Since the thermistor holder is provided integrally with the refrigerant passage plate in this manner, the strength of the thermistor holder can be increased. Then, if the evaporator thermistor is held by this thermistor holder, the evaporator thermistor can be firmly attached.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 3 and the same members as those in FIGS. 1 is an enlarged view of a main part of the present embodiment, FIG. 2 is a perspective view of the evaporator 1, and FIG. 3 is a top view thereof. The evaporator 1 includes a plurality of refrigerant passage plates 8 and the refrigerant passage plates 8
And an evaporator fin 9 arranged between the two.

Since the two refrigerant passage plates 8 in the central portion of the evaporator 1 are arranged in contact with each other, a part of the two refrigerant passage plates 8 is extended in the plate surface direction, and A thermistor holder 13 for holding the cord of the evaporator thermistor 10, that is, the cord protector 12 (see FIG. 4) is formed in the extended portion. As a result, the thermistor holder 13 is formed integrally with the refrigerant passage plate 8.

The thermistor holder 13 is formed by combining two refrigerant passage plates 8 with a bulge portion 14 that matches the cord protection portion 12 of the evaporator thermistor 10 to provide elasticity and always protect the cord. The dimensions are such that the part 12 is pushed. Therefore, as shown in FIG. 5, the inner diameter D1 of the bulge portion 14 of the thermistor holder 13 and the evaporator thermistor 10 inserted and held in the bulge portion 14 are held.
The relationship with the outer diameter D2 of the cord protector 12 is D1 <D2. Further, the inlet portion 15 of the thermistor holder 12 has an open shape so that the cord protection portion 12 of the evaporator thermistor 10 can be easily inserted. In addition, the above code protection unit
Since 12 has a groove formed, there is an effect that the mounting height becomes constant.

Next, the operation of this embodiment will be described. As described above, the thermistor holder 13 formed integrally with the refrigerant passage plate 8 has the cord protection portion of the evaporator thermistor 10.
When the 12 is inserted, the thermistor holder 13 elastically embraces the cord protector 12 so that the evaporator thermistor 10
The installation of will be firm. As a result, the temperature of the evaporator thermistor 10 can always be controlled at a predetermined position without being displaced by vibration or air blowing.

As described above, since the thermistor holder 13 is provided so as to project perpendicularly to the surface of the evaporator 1, the evaporator thermistor 10 inserted and held in the thermistor holder 13 is at the position of the conventional evaporator fin 9. Instead, it is installed at the position of the thermistor holder 13 protruding from the refrigerant passage plate 8. However, if the thermistor holder 13 is structured to have an angle with respect to the surface of the evaporator 1, the evaporator thermistor 10 can be installed at the position of the evaporator fin 9.

[0019]

As described above, according to the present invention, a part of the two refrigerant passage plates in the central portion of the evaporator is extended in the plate surface direction, and the evaporator thermistor is held in this extended portion. Since the thermistor holder is provided, the thermistor holder can be formed integrally with the refrigerant passage plate. Since the thermistor holder is provided integrally with the refrigerant passage plate in this way, the evaporator thermistor can be easily attached.
The strength of the thermistor holder can be improved. Then, if the evaporator thermistor is held by the thermistor holder thus formed, the evaporator thermistor can be firmly attached.

Since the evaporator thermistor can be firmly fixed to the predetermined position in this way, the temperature of the evaporator thermistor can be controlled accurately, freezing of the evaporator fins and the like can be avoided, and the cooling capacity can be suppressed.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing an entire evaporator having the thermistor holder shown in FIG.

FIG. 3 is a top view of that of FIG.

FIG. 4 is a front view of an evaporator thermistor.

FIG. 5 is a top view showing a place where a cord protection part is fitted to a thermistor holder.

FIG. 6 is a front view showing a mounting position of a holder of a conventional evaporator thermistor.

FIG. 7 is a system diagram showing a layout of an evaporator and an evaporator case.

[Explanation of symbols]

 1 Evaporator 8 Refrigerant passage plate 10 Evaporator thermistor 13 Thermistor holder

Claims (1)

[Claims] 1. A part of two refrigerant passage plates in a central portion of an evaporator is extended in a plate surface direction, and a thermistor holder for holding an evaporator thermistor is formed in the extended portion. Evaporator device for air conditioner.