JPS6175014A - Air resistor in air conditioning system - Google Patents

Abstract

PURPOSE:To make it possible to facilitate the attachment of a heat insulating plate, in an air resistor in an automobile air conditioning system, by constituting the heat insulating plate with a heat transmissible member, and by disposing the heat insulating plate in an evaporator or in a cooling duct for the evaporator. CONSTITUTION:A heat insulating plate 20 formed of a heat transmissible member is attached to the lower part of horizontal section 12a of a coolant passage outlet side pipe 12 which is connected to the upper part 11a of an evaporator 11 so that the heat insulating plate 20 is heat-exchangeable with the pipe 12, and a resistor 15 is attached, direct below the heat insulating plate 20, to one side wall 10a of a casing 10 which is covered by the front wall 10a of the casing 10. With this arrangement the heat-insulating plate 20 is cooled by heat- exchange with the cooling pipe 12 which is cooled by coolant. Accordingly, it may be unnecessary that the heat insulating plate 20 is projected into an air passage 6 for cooling, thereby it is possible to facilitate the attachment of the air resistor.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> - The present invention relates to a register for an air conditioner, particularly a register for a vehicle air conditioner.

<Prior Art> Conventional air conditioner registers include those shown in FIGS. 5 to 9 (see Japanese Utility Model Application Publication No. 58-132718).

The air conditioner 1 includes a blower unit 2 that pumps air A.
, a cooling unit 3 that cools the air A, and a cooling unit 3 that cools the air A.
The air mix damper 7 is arranged in an air flow path 6 that is continuously formed in the air conditioner 1.
a and dampers 7b and 7C17 for controlling a plurality of air outlets.
By opening and closing d, the temperature of the air A and the blowing position are adjusted.

The cooling unit 3 in this air conditioner 1 includes a compressor (not shown) in a resin case 10, which has an air inlet 8 on the blower unit 2 side and an air outlet 9 on the heater unit 5 side. It houses an evaporator 11 that directly cools the air A by circulating liquefied and cooled refrigerant, an outlet pipe 12 as a "refrigerant passage", an expansion valve 13, and the like. Furthermore, this cooling unit 3 includes a resistor 15 attached to the side wall 10a of the case 10 near the air inlet 8 via a heat insulating plate 14, and a case 1 directly above the resistor 15.
A resistor 17 is arranged, which is made up of a heat shield plate 16 attached to a corner 10c of a top wall 10b and a side wall 10a.

The resistor 15 of this resistor 17 is as shown in FIG.
It is connected in series with the fan motor 2a of the blower unit 2, and by selecting resistors 15a and 15b of a coil-shaped resistor 15 using a switch 18, the rotation speed of the fan motor 2a is changed. Therefore,
Because the resistor 15 generates heat when energized due to its performance, it is placed in a state where it protrudes from the side wall L (la) of the case 10 into the air passage 6 of the air inlet 8 for cooling.
It is installed in a location where there are no other parts around it.

On the other hand, the heat shield plate 16 is designed to prevent the top wall 10b and side wall 10a of the case 10 above the resistor 15 from being melted or thermally deformed due to the hot air rising upward from the resistor 15 that generates heat. The upper wall 10 above the case 10
It has a bent shape along the corner 10c between the side wall 10a and the side wall 10a.

In order to further reduce the influence of hot air on the case 10, the heat shield plate 16 is attached and fixed to the corner 10c of the case 10 with screws at regular intervals through four spacers 19. ing.

<Problems to be Solved by the Invention> However, in the resistor 17 of such a conventional air conditioner 1, the resistor 15 is installed so as to protrude into the air passage 6. This creates ventilation resistance for the air A flowing through the series of air passages 6 formed within the device 1, and sometimes noise is generated due to this ventilation resistance. Furthermore, a heat shield plate 16 for protecting the case 10 from the hot air rising from the resistor 15 is attached to the corner 10c of the case 10 above the resistor 15 with a spacer 19 interposed therebetween at a constant interval. However, this work is surprisingly troublesome and has had a considerable effect on the efficiency and cost of the register 17 installation work.

The present invention has been made with attention to such conventional technology, and an object of the present invention is to provide a resistor for an air conditioner in which the resistor does not protrude into the air passage and the heat shield plate can be easily attached. The purpose is

Means for Solving the Problems> In order to achieve the above object, the register of the air conditioner according to the present invention uses a heat shield plate as a heat conductive member that easily transmits heat, and is sufficiently cooled by a refrigerant. It is provided either in the evaporator or in the refrigerant passage to the evaporator.

Function: The heat shield plate provided above the resistor is made of a heat conductive member that easily transmits heat, and is provided either in the evaporator that is sufficiently cooled by the refrigerant or in the refrigerant passage to the evaporator, so that the heat shield plate itself Since the resistor is cooled by the cold air emitted downward from the cooled heat shield, it is necessary to make the resistor protrude into the air passage for cooling. Moreover, since the hot air rising from the heated resistor is blocked by this cold air and the heat shield itself, the case above the resistor will not melt or be thermally deformed.

Example of implementation The details of this invention will be explained below based on the drawings.

In addition, parts common to the conventional model are given the same reference numerals.
Duplicate explanations will be omitted.

1 to 3 are diagrams showing an embodiment of the present invention.

Evaporator 1 covered by front wall 10d of case 10
At the upper part tta of 1, there is an outlet pipe 1 as a "refrigerant passage".
2 are connected, and a heat shield plate 20 made of a heat conductive material is welded to the lower part of the horizontal part 12a, which is the part to which the outlet pipe 12 is connected, so as to be able to freely exchange heat with the outlet pipe 12. installed. Immediately below this heat shield plate 20, a resistor 15, which is combined with the heat shield plate 20 as a resistor 21, is attached to the side wall 10a of the case 10 in a portion covered by the front wall 10d. Outlet pipe 12
is sufficiently cooled by the refrigerant, so that the heat shield plate 20 itself, which is attached by welding, is also sufficiently cooled. Therefore, since the resistor 15 is cooled by the cold air emitted downward by the sufficiently cooled heat shield plate 20, there is no need to project it into the air passage 6 and bring it into contact with the air A for cooling. Furthermore, the hot air rising from the resistor 15 is blocked by the cold air of the heat shield plate 16 and by the heat shield plate 16 itself, so that the case 10 above the resistor 15 is not welded or thermally deformed.

FIG. 4 is a diagram showing another embodiment of the present invention.

The heat shield plate 23 of the resistor 22 according to this embodiment is attached to the surface of the evaporator 11 immediately above the resistor 15 by welding its side portion.

Therefore, since the heat shield plate 23 is sufficiently cooled by the evaporator 11, the resistor 15 can be cooled by the cold air emitted downward by the heat shield plate 23, as in the previous embodiment, and the cold air and The heat shield plate 23 itself can block hot air rising from the resistor 15 and protect the case 10 above the resistor 15. The other configurations are the same as in the previous embodiment, and redundant explanation thereof will be omitted.

In addition, in the above explanation, the heat shield plate 20.23 is used as a "refrigerant passage" for the horizontal portion 12a of the outlet pipe 12 or the evaporator 1.
"Welding" is shown as an example of a means for attaching to the surface of 1, but it is not limited to this, and any attachment means that can conduct heat exchange with the "evaporator" or "refrigerant passage" in the attached state can be used. Various attachment means can be employed.

Effect> The resistor of the air conditioner according to the present invention has the contents as explained above, and there is no need to provide the resistor to protrude into the air passage of the air conditioner. This contributes to smooth ventilation of the air conditioner, and there is no fear that noise will be generated by the resistor.

Furthermore, the heat shield plate does not require any troublesome installation work such as using spacers or the like, and can simply be attached to either the evaporator or the refrigerant passage to the evaporator by welding or other means, so it is easy to install the heat shield plate. It is simple and has advantages in terms of work efficiency and cost.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway perspective view of a cooling unit showing an embodiment of the present invention, Fig. 2 is an enlarged plan view of the register shown in Fig. 1, and Fig. 3 is a view taken from the direction indicated by the arrow 4 is an enlarged side view corresponding to FIG. 3 showing another embodiment of the present invention; FIG. 5 is a schematic explanatory diagram showing a conventional example of the air conditioner of the present invention; FIG. 6 is an electric circuit diagram showing a resistor of a conventional resistor, FIG. 7 is a perspective view equivalent to FIG. 1 showing a conventional cooling unit, FIG. 8 is an enlarged plan view equivalent to FIG. 2 showing a conventional resistor, and FIG. 9 is an enlarged side view seen from the direction indicated by the arrow (■) in FIG. 1- Air conditioner 3 - Cooling unit 8 - Air inlet 10 - Case 11 - Evaporator 12.25 - Outlet pipe (refrigerant passage) 13 - Expansion valve (refrigerant passage) 15 - Resistor 16.20.23 ---1 Heat shield plate 17.21.22.24 - Register Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 8 Figure 9

Claims (1)

[Scope of Claims] An air conditioner comprising a resistor that generates heat when energized and a heat shield plate provided above the resistor, and that is arranged near the air inlet of a cooling unit that houses an evaporator in a case. A register for an air conditioner, wherein the heat shield plate is made of a heat conductive member and is provided in either an evaporator or a refrigerant passage to the evaporator.