JPS5836039Y2 - temperature detector - Google Patents

Description

[Detailed description of the invention] The present invention relates to a temperature sensor in which a bellows communicating with a temperature-sensitive tube expands and contracts due to the expansion and contraction of gas sealed therein to open and close contacts. A heater for heating the other temperature-sensing tube section and the bellows section is installed in an accurate state so that the section senses the temperature accurately, and the installation is simple and the bellows section and the temperature-sensing tube are connected together. This provides a structure that can sufficiently protect the parts.

Next, embodiments of the present invention will be described in detail based on the drawings.

A is a refrigerator-freezer body with a freezer compartment 2 in the upper part and a refrigerator compartment 1 in the lower part, and the inner wall of the freezer compartment 2 is a cooling pipe 2A.
It is composed of a plate-shaped cooler 2B in which .

3 is a temperature detector that detects the end temperature of the defrosting operation of the cooler 2B and performs a control operation to start the electric compressor B and switch to cooling operation, and a contact point for this control;
The main body 3A has a built-in mechanism for operating this mechanism and a bellows for operating this mechanism, and a temperature-sensitive thin tube 4 that is connected to a bellows portion 3' and communicates with the bellows, and has a hollow space sealed with gas. .

The tip of this temperature-sensitive thin tube 4 is attached to the cooler 2B and is a part that effectively senses temperature, and the bellows expands and contracts as the gas expands and contracts due to this temperature sensing. The contacts are opened and closed by expansion and contraction.

A heater 8 for heating the other temperature-sensitive tube portions 4B and the bellows portion 3' except for the temperature-sensing portion 4A to maintain the temperature always higher than that of the temperature-sensing portion 4A to stabilize the operation is installed in the temperature-sensitive tube. The portion 4B and the bellows portion 3' are arranged in a heat exchange state.

This heater 8 is inserted into a flexible tube 9 made of nylon or the like and open at both ends.

Two holes 10 and 10' are bored in this tube 9, one hole 10' is for draining water inside the tube 9, and the other hole 10 is a short distance from the bellows part 3'. The temperature-sensitive thin tube 4 penetrates so that only the 4B portion of the temperature-sensitive thin tube 4 is exposed and the remaining 4B portion is housed in the tube 9, and the effective temperature-sensitive portion 4A is exposed from the tip of the tube 9.

Reference numeral 7 denotes a support having hook-shaped elastic locking pieces 6, 6 extending in parallel to both ends of the substrate 7A, and a groove 5A or a groove 5A protruding perpendicularly to the substrate 7A into which the temperature-sensitive thin tube 4 is inserted and held. A holding portion 5 having a hole is formed, and this holding portion 5 also functions as a pressing portion, which will be described later.

Locking notches 11, 11 are formed on both sides of the main body 3A.

A transverse groove 12 is formed between the holding part 5 and the substrate 7A, through which the tube 9 surrounding the heater 8 is inserted, and the elastic locking parts 6 are locked with the temperature-sensitive thin tube 4 inserted into the groove 5A. Part 11,
11, the tube 9 containing the heater 8 is pressed against the bellows portion 3' by a pressing portion which is the inner surface of the holding portion 5.

In order to accurately press the bellows part 3/, an area where the tube 9 is surrounded is created between the temperature-sensitive thin tube 4, the holding part 5, and the side surface of the main body 3A. A suppressing portion 5B that cooperates with a pressing portion, which is the inner surface of the holding portion 5, is formed continuously at right angles to the holding portion 5 so as to come into contact with the connection portion with the thin tube 4.

With the support 7 attached to the main body 3A in this way, the effective temperature sensing portion 4A is attached to the predetermined location of the cooler 2B as shown in FIG. Attach it to the mounting plate 13 with screws.

In this case, the holes 10 are arranged at the lowest position so that even if defrosting water enters the tube 9, it can be drained.

By configuring the present invention as described above, the tube receiving the heater is pressed by the suppressing part so as to sufficiently heat the connecting part between the bellows part and the temperature-sensitive thin tube, and the part near the bellows part is pressed by the holding part. This prevents the possibility that the connecting portion for holding the temperature-sensitive tube is damaged during the bending operation of the temperature-sensitive tube when inserting silk into the refrigerator.

In addition, by forming pressing parts on two sides as shown in the figure, the tube containing the heater can be positioned in the area surrounded by the temperature-sensitive thin tube, the temperature sensor body, and the suppression part, so that the tube slides and moves due to the suppression. This means that accurate operation can be achieved by constantly heating the bellows and the temperature-sensitive tube.

[Brief explanation of the drawing]

Figure 1 is a schematic vertical cross-sectional view of the refrigerator body in which the present invention is applied to a refrigerator-freezer, Figure 2 is a diagram showing the temperature sensor of the present invention equipped with a malfunction prevention mechanism, and Figure 3 is a schematic longitudinal sectional view of the refrigerator body in which the present invention is applied. This is an exploded prayer diagram of Figure 2. 3... Temperature detector, 5B... Pressing part,
6...Elastic locking part, 7...Support, 8
······heater.

Claims (1)

[Scope of utility model registration request] In a temperature sensor that opens and closes contacts by expanding and contracting due to the expansion and contraction of gas sealed in communication with a temperature-sensitive thin tube, a portion of the temperature-sensitive tube other than a predetermined temperature-sensitive portion and the bellows portion are connected to the temperature-sensitive tube. a flexible tube for holding the heater in heating relation to the temperature-sensitive capillary tube; A support is provided that has a holding part that holds the warm tube and a pressing part that presses the tube inserted through the heater against the bellows part, and the elastic locking of the support suppresses the tube and the bellows part. A temperature sensor consisting of a