JPH0323549Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement in the mounting structure of a temperature sensor that detects the temperature of a heat exchanger used in an air conditioner, etc., and one of its purposes is to improve assembly workability. It is something to do.

Conventionally, as shown in FIG. 4, three types of mounting structures for this type of temperature sensor are known: A, B, and C. That is, in A, a copper plate 2a having a partially burred hole is welded to the hairpin part 1a of the right refrigerant pipe of the heat exchanger a, and a temperature sensor 2a is sandwiched between this copper plate 2a and a partially curved copper plate 3a, and the screw 5 is used to secure the temperature sensor 2a. It was tightened. In this case, most of the temperature sensor 2a is in contact with the copper plates 2a and 3a, which have good thermal conductivity, so the response is good, but on the other hand, the number of parts is large, and the number of assembly steps is also increased, resulting in high cost.

Also, in the same figure, B shows a structure in which the bare pin part 1b of the heat exchanger a and the temperature sensor 2b are both sandwiched between two curved spring members 3b made of a copper material. It is unsuitable as a material for the temperature sensor 2b, and has the disadvantage that the contact area with the hairpin 1b in the temperature sensor 2b is small, resulting in poor responsiveness.

Furthermore, in the same figure, C crimps a part of the fin 1c of the heat exchanger a and connects the temperature sensor 2c.
This shows the structure that sandwiches the
It has drawbacks such as poor workability when caulking the fins 1c, responsiveness of the temperature sensor 2c being affected by the work, which tends to vary, and poor parts replacement.

Furthermore, a temperature sensor mounting structure shown in FIG. 5 is known as a structure that eliminates each of the above-mentioned drawbacks A to C.

That is, a tube body 2d made of a material with good thermal conductivity is welded to the hairpin portion 1d of the heat exchanger a, and a temperature sensor having a smaller diameter than this tube body 2d is inserted and supported. If there are variations in the diameter of the tube 2d or the diameter of the temperature sensor, the holding force will not be constant because the temperature sensor is simply inserted, and the temperature sensor may fall out or become unable to be inserted. Ta.

The present invention solves each of the above-mentioned conventional problems.

Hereinafter, the present invention will be described with reference to FIGS. 1 to 3 of the accompanying drawings showing one embodiment thereof.

In the figure, 1 is the outdoor unit main body of a separate type air conditioner, and 2 is the outdoor unit main body 1.
A fin plate heat exchanger installed inside the
As is well known, by arranging a large number of fins 3 in parallel, passing a plurality of refrigerant pipes 4 vertically through them, and connecting both ends of each refrigerant pipe 4 with a U-shaped hairpin pipe 5, A meandering heat medium circuit is formed. Reference numeral 6 denotes a support tube made of a material with good thermal conductivity, which is welded and fixed to one or more hairpin tubes 5 on the minus side of the heat exchanger 1, and both ends thereof are open. This support tube 6 is
A substantially C-shaped support part 6 having a separation space 6d in a part
a and a C-shaped flexible part 6b having a diameter smaller than that of the supporting part 6a and having a separation space 6e in a part, and facing each other at a constant interval, and the supporting part 6a and the flexible part 6
A connecting portion 6c that connects the separated spaces 6d and 6e of b.
It is composed of Reference numeral 7 denotes a temperature detection element having a well-known structure, which is detachably inserted into the support tube 6. The inner diameter of this support tube 6 is formed to be slightly larger than the outer diameter of the temperature detection element 7.

In the above configuration, the temperature detection element 7 is installed by simply inserting the temperature detection element 7 into the large-diameter support part 6a of the support tube 6, and connecting the connection part 6c with the second part, as shown in FIG. As shown in FIG. 3b, the temperature detection element 7 can be held on the support portion 6a by caulking the connecting portions 6c so that they come into close contact with each other. Further, when removing it, it can be done by inserting a screwdriver or a pointy object into the connecting portion 6c or the small diameter flexible portion 6b to spread the flexible portion 6b.

Therefore, work such as attaching and removing the temperature detection element 7 is easy, and the workability of replacement and assembly is excellent. Also, the support tube 6
Since it is made of a material with good thermal conductivity, the surface temperature of the hairpin tube 5 is transferred well, and since the temperature detection element 7 is in contact with the support tube 6 over almost the entire circumference, the The responsiveness of the temperature detection element 7 is also good. Furthermore, the number of parts to which the temperature detection element 7 is attached is small, and the cost is also low. Moreover, since both ends of the support tube 6 are open, the temperature detection element 7
The direction of insertion is also not limited to one direction.

In this embodiment, the support tube 6 is attached in a direction perpendicular to the hairpin tube 5, but it can be similarly attached to the surface of a conduit or passage through which a heat medium flows, and its field of use is heat exchange. It is not limited to vessels, but can be applied to a wide range of fields.

As is clear from the above embodiments, the temperature sensor mounting structure of the present invention is such that a support tube made of a material with good heat transfer is attached to the surface of a pipe or passage through which a heat medium flows. A temperature sensor with a diameter smaller than the inner diameter of the support tube is removably inserted into the support section, and the connecting section or flexible section is caulked. Since it is only necessary to insert it and caulk the connecting part, the workability is very good, and the workability is also good during maintenance, inspection, and replacement of the temperature sensor, and there is no risk of damaging the temperature sensor. In addition, since almost the entire circumference of the temperature sensor is in close contact with the supporting part, temperature detection accuracy is good.Furthermore, since the structure only requires attaching the support tube, the number of parts is extremely small, it can be manufactured at low cost, and Even if the sensor dimensions vary, it can be installed satisfactorily, and quality can be stabilized.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of an outdoor unit of an air conditioner equipped with a temperature sensor mounting structure according to an embodiment of the present invention, Fig. 2 is an enlarged view of section A in Fig. 1, and Fig. 3 a and b are plan views showing the states before and after fixing the temperature sensor on the support tube in the same mounting structure, respectively, and FIGS. 4 and 5 are plan views of the heat exchanger showing various mounting structures for the temperature sensor in conventional examples, respectively. FIG. 2... Heat exchanger, 5... Hairpin tube, 6... Support tube, 6a... Support part, 6b... Flexible part, 6c...
...Connection part, 6e, 6d... Separation space.

Claims (1)

[Scope of utility model registration request] A support tube made of a material with good heat transfer is installed on the surface of the pipe or passage through which the heat medium flows, and this support tube is connected to a C-shaped support part with a separation space in part, and a support pipe with a diameter smaller than this support part. a C-shaped flexible part that is large and has a separation space in part, and a connecting part that faces each other at a constant interval and connects each separation space of the support part and the flexible part; , a temperature sensor mounting structure in which a temperature sensor with a diameter slightly smaller than this support part is removably inserted, and the connecting part is caulked in the direction in which both sides approach each other.