JPS6355378A - Device for mounting overload sensor for compressor - Google Patents

Abstract

PURPOSE:To improve sensing accuracy, by inserting an overload sensor with a width larger than that of a gap defined between a support frame of a surface of a compressor and a pawl. CONSTITUTION:An overload sensor is mounted by inserting a cylindrical unit of its distal end between an outside surface of a compressor 1 and a pawl 4 formed integrally with a support frame 2 of the compressor. A thin cylindrical portion of the overload sensor 8 is inserted into a cutout 5 defined in the pawl 4. A thickness of the distal end of the overload sensor is made larger than a gap G defined between the compressor 1 and the pawl 4 in size. With the arrangement, the overload sensor can be brought into close contact with the compressor, whereby accuracy of a sensed temperature can be improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mounting device for a compressor overload detector, and in particular to a compressor overload detector suitable for accurately detecting the overload state of a compressor. This invention relates to an overload detector mounting device.

[Conventional technology]

The conventional overload/load detector for compressors for refrigerators was developed in 1970.
It is a thermally responsive switch as described in Japanese Utility Model Publication No. 94464 and Japanese Utility Model Application No. 51-470, and its holding means is as described in Japanese Utility Model Publication No. 51-50291 and Japanese Utility Model Application Publication No. 50-55157. It is held down by a spring.

[Problem that the invention seeks to solve]

The above-mentioned conventional technology does not take into consideration the effects of accurately detecting the overload temperature, the switching life of the detector, and the effectiveness in mass production due to easy installation and short installation time, and the frequent operation of the switch There were problems with the operating life, detection accuracy for set temperature, and installation time.

An object of the present invention is to provide a mounting device for a compressor overload detector that can accurately detect the overload state of a compressor.

[Means for solving problems]

The above purpose comprises a support frame attached to the surface of the compressor, a claw provided in the support frame described above, and a gap formed between the claw and the outer surface of the compressor, This is achieved by inserting in the gap an overload detector that is larger than the width of the gap.

[Effect]

Since the overload detector is inserted with a width larger than the width of the gap formed between the surface of the compressor and the claw, the overload detector is brought into close contact with the surface of the compressor by the claw. by this,
Accurate temperature detection is possible without being affected by outside temperature.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. 1 is a compressor for a refrigerator and is cylindrical. 2 is a support frame that holds the compressor, and is welded to the end of the compressor 1.

Reference numerals 3a and 3b are mounting holes for fixing the support frame to a vibration-proof rubber base (not shown). 4 is a claw formed integrally with the support frame 2, and a U-shaped notch 5 is provided inside the claw. Reference numeral 6 denotes a hermetic seal provided in the compressor 1, and 7a, 7b, and 7C made of electrical insulators are electrical terminals that penetrate the hermetic seal 6 and protrude to the outside. Reference numeral 8 denotes an overload detector, which has a T-shaped cylindrical shape as shown in FIG. The configuration of the overload detector 8 will be explained with reference to the sectional view of FIG. 3. 9 is a glass-sealed thermistor whose electrical resistance value changes continuously in accordance with temperature changes. 9a,
9b is a lead of a thermistor, which is used for homing as shown in FIG. IOa and 10b are stranded wire leads with insulation coating. After connecting the core wire and the lead of thermistor 9, cover the heat shrink tube 112.11b, shrink the heat shrink tube by overheating, and remove the lead of thermistor 9.
Reinforce the connection parts of 0a and tab. The tip of the heat shrink tube should be able to be turned over to a position where it protrudes from the thin cylindrical portion of the single-shaped overload detector, as shown in FIG. 12
is silicone resin, and thermistor 9 and lead 9
a, 9b, their connection points, a portion of the heat shrink tube, and the tips of the leads 10a, 10b are embedded in silicone resin. Silicone resin has excellent heat resistance, flexibility, and excellent vibration resistance. To install the overload detector, as shown in FIG. 3, the cylindrical portion at the tip is inserted between the outer surface of the compressor 1 and a claw 4 formed integrally with the support frame 2 of the compressor. The thin cylindrical portion of the overload detector 8 is inserted into the notch 5 provided in the claw 4. At this time, the thickness T of the tip of the overload detector is made larger than the gap G provided between the compressor 1 and the claw 4 so that the cylindrical portion of the tip comes into close contact with the surface of the compressor 1. Also, when mounting, although not shown in the figure, the lead 1OA4
10b is connected to the connecting terminals 7a, 7b, '7c of the compressor and tied together.

Therefore, the space between the thermistor 9, which is a heat-sensitive part, and the compressor 1 is filled with silicone resin, and there is no air layer. Conductivity λ is 0.259Kca
Vmh°C. Therefore, silicone resin has about 9 times better thermal conductivity. Furthermore, the thermistor9 is better than the conventional bimetal.
Since the overload detector 8 is smaller in size and the overload detector 8 can be made smaller than the conventional one, the influence of the outside air temperature around the compressor is small, and temperature fluctuations on the surface of an inverter type compressor can be detected with high accuracy.

In addition, conventional bimetallic switches have moving parts and the operating value changes over time due to metal fatigue, whereas the present invention uses a thermistor, so there are no moving parts and a highly reliable overload detector is provided. can.

〔Effect of the invention〕

According to the present invention, since the overload detector can be placed in close contact with the compressor, temperature changes when the compressor is overloaded can be sensitively detected through thermal conduction of the silicone resin. An overload detector with high detection temperature accuracy can be obtained.

[Brief explanation of drawings]

Fig. 1 is a side view of one embodiment of the present invention, Fig. 2 is a perspective view of the mounting member shown in Fig. 1, Fig. 3 is a cross-sectional view of the gusset shown in Figs. 6 is a perspective view of a load detector 1... A compressor for a refrigerator, 2... A support frame for a compressor, 3
a, 3b...Mounting hole, 4...Claw, 5...Notch, 6...Hermetic seal, 7a, 7b, 7C...
・Terminal, 8... Overload detector, 9... Glass sealed thermistor, 10a, IQb... Lead, lla, 1
lb--Heat shrink tube, 12-Silicone resin. ￥ 1 8. , Yuni Bond Yokogoshun Tea 32

Claims (1)

[Claims] 1. A support frame attached to the surface of the compressor, a claw provided on the support frame, and a predetermined overload detector formed between the claw and the outer surface of the compressor should be inserted. A mounting device for an overload detector for a compressor, characterized in that the width of the gap is smaller than the width of the overload detector.