JPS6119426Y2 - - Google Patents

Description

[Detailed description of the invention] This invention provides a machine room that houses an electric compressor for a refrigeration cycle below the goods storage room, and uses foam insulation material to foam on-site in the space between the inner box and the outer box. In the box body, a fitting for a temperature-sensing part of a thermostat that controls the operation of the electric compressor is attached to the outer surface of the inner box, so that the temperature-sensing part of the thermostat can be inserted into this fitting from the machine room. To provide a structure in which leakage prevention of the foam heat insulating material can be achieved by achieving a seal between the fixture and the machine room ceiling board by a combination of the inner box and the outer box in the case of It is.

Next, an explanation will be given based on an embodiment of the present invention. Reference numeral 1 denotes a cooling box body which is open at the top and a space between an inner box 2 and an outer box 3 is filled with a foamable heat insulating material 4 by foaming on site. The top opening can be opened and closed by a door or lid (not shown). Reference numeral 5 denotes an article storage chamber formed by the inner box 2, which is cooled by a refrigerator 6 of a refrigeration cycle attached to the outer surface of the inner box 2. Reference numeral 7 denotes a machine room provided below the article storage room 5, which is surrounded by an outer box 3 and houses an electric compressor 8 of a refrigeration cycle.

9 is a thermostat that controls the operation of the electric compressor 8. In the figure, it communicates with the temperature sensing part 10 through a capillary tube 14, and has a bellows filled with a gas whose state changes depending on the temperature. This figure shows a well-known switch mechanism that opens and closes the energizing circuit of the electric compressor 8 upon contraction. Reference numeral 11 denotes a temperature-sensing part mount, in which the temperature-sensing part 10 is attached to the outer surface of the inner box 2 in a substantially vertical state using aluminum tape so as to extend downward, and is shaped like a straight tube and is open only at the lower end. Between a pair of protrusions 12, 12 formed on the inner box 2 so as to protrude in the direction of the heat insulating material 4, the protrusion 1
2 and 12 are positioned relative to each other. The temperature sensing part attachment 11 consists of a metal pipe 11A attached to the inner box 2 so that the temperature of the inner box 2 or the cooler 6 can be easily detected by the temperature sensing part 10, and a synthetic resin pipe 11B connected to the lower end of the metal pipe 11A. The diameter of the outer surface of the pipe 11B gradually decreases downward. pipe 1
1B is a material that is not attacked by fluorocarbon gas in the foamable heat insulating material 4. A hole 13 is bored in the ceiling plate 3A of the machine room 7, which forms a part of the outer box 3. Inner box 2 with temperature sensing part attachment 11 attached to inner box 2 in advance.
is inserted into the outer box 3 from the upper opening of the outer box 3. With this insertion, the pipe 11B is inserted into the hole 13 of the ceiling plate 3A, and since its outer surface becomes larger in diameter as it goes upward, the pipe 11B is inserted into the hole 13 at the correct combination position of the inner box 2 and outer box 3. The outer surface of 11B is tightly fitted. In this state, the space between the inner box 2 and the outer box 3 is filled with foamable heat insulating material 4 by on-site foaming. After this foaming process is completed, the temperature sensing part 10 of the thermostat 9 is inserted through the lower end opening of the pipe 11B, so that the temperature sensing part 10 can sense the temperature of the inner box 2 through the pipe 11A.

By configuring the present invention as described above, the temperature-sensing part mount for inserting the temperature-sensing part of the thermostat can be tightly fitted into the hole in the ceiling plate of the machine room by assembling the inner box and the outer box. Since this hole can be sealed, it is possible to create a structure that prevents leakage of the foam heat insulating material without providing any special sealing material. At this time, the positioning of the temperature-sensing part mounting tool is ensured by the protrusions on the inner box, so that the insertion work into the hole in the ceiling plate becomes easy and reliable. In addition, since the part that penetrates the ceiling plate of the temperature sensing part mount is made of synthetic resin, it ensures close contact with the ceiling plate, and also prevents the low temperature of the inner box and cooler from being transmitted to the ceiling plate. No dew build-up occurs. Furthermore, since the temperature-sensing part mounting tool protrudes into the machine room, the design is good, and the temperature-sensing part can be easily inserted and removed.

[Brief explanation of the drawing]

Figure 1 is a longitudinal cross-sectional side view of the cooling box body of the present invention;
The figure is a cross-sectional view taken along the line A-A' in FIG. 1, and FIG. 3 is an enlarged cross-sectional view of the temperature-sensing part mount and machine room ceiling plate in FIG. 2. 1...Cooling box body, 2...Inner box, 3...Outer box, 4
. . . Foaming heat insulating material, 5 . . . Goods storage room, 7 . . . Machine room, 8 .

Claims (1)

[Scope of utility model registration request] In the cooling box body, a machine room housing an electric heavy compressor for a refrigeration cycle is provided below the goods storage room, and a foam insulation material is foamed on-site in the space between the inner box and the outer box. a pair of protrusions that are formed and protrude toward the foam insulation material; a thermostat that is located between the protrusions and is supported so as to extend downward on the outer surface of the inner box, and that controls the operation of the electric compressor; The temperature-sensing part fitting consists of a straight tube-shaped temperature-sensing part fitting with an opening at the lower end into which the temperature-sensing part is inserted, and the temperature-sensing part fitting consists of a metal pipe attached to the inner box and a fluorocarbon-resistant synthetic material connected to the bottom end of the pipe. The outer surface of the latter pipe gradually becomes smaller in diameter toward the bottom, and a hole is provided in the ceiling plate of the machine room,
A cooling box body characterized in that in a combination of the inner box and the outer box, the outer surface of the pipe of the latter is tightly fitted into the hole of the ceiling plate.