JPH0522830B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an air passage structure in a temperature control device that includes a freezing chamber and a refrigerating chamber and allows cold air to flow independently into the refrigerating chamber.

Conventional configuration and its problems A conventional example will be explained with reference to FIGS. 4 and 5.

Reference numeral 1 denotes a refrigerator main body, which is divided by a partition wall 2 into a freezer compartment 3 in the upper part and a refrigerator compartment 4 in the lower part. The rear part of the freezer compartment 3 is equipped with a cooler 7 for the refrigeration cycle and a blower 6 for forced ventilation. Reference numeral 8 denotes a temperature control device, which is provided with a damper opening/closing device 9 (generally called a damper thermostat) for controlling the amount of cold air to the refrigerator compartment 3 and a heat insulator 9' forming a cold air discharge passage to the refrigerator compartment 3. . Reference numeral 5 denotes a ventilation duct, one end of which is open to the discharge side of the freezer compartment, and the other end of which is open opposite the flap 9a of the damper opening/closing device 9 of the temperature control device 8. In this configuration, the blower 6 causes forced convection of cold air cooled by the cooler 7 to the refrigerator compartment 4 via the freezer compartment 3 and the ventilation duct 5.

Normally, the temperature of the freezer compartment in such a cold air forced draft refrigerator is controlled by a thermostat TH that senses the temperature inside the refrigerator and starts and stops the operation. and,
The temperature of the refrigerator compartment 4 is adjusted by sensing the temperature with a damper opening/closing device 9 provided at the outlet of the ventilation duct 5 and controlling cold air convection by opening and closing a flap 9a.

The inside of the ventilation duct 5 is extremely cooled during operation due to the cold air from the ventilation fan 6 and the influence of the cooler 7.

However, when the operation is stopped, the warm air inside the refrigerator compartment 4
The reverse flow rises into the ventilation duct 5. Especially here,
The food in refrigerator compartment 4 contains a lot of moisture,
If the door 10 is opened and closed frequently or if there is a gap in the door 10, this backflow of warm air becomes very humid and condenses inside the ventilation duct 5. When this condensed water increases by a certain amount or more, it flows out into the refrigerator compartment 4 from the ventilation duct outlet 5a. However, the duct outlet 5a has a damper opening/closing device 9 equipped with a flap 9a for adjusting the air volume.
However, since it is held downward, the condensed water that flows out will flow into the main body of the damper opening/closing device 9. Therefore, during re-cooling operation, there is a risk that this condensed water will freeze and the flap 9a of the damper opening/closing device 9 will freeze, causing overcooling in the refrigerator compartment 4 and inability to adjust the temperature due to malfunction. It was.

OBJECTS OF THE INVENTION Therefore, an object of the present invention is to prevent condensed water from flowing into a damper opening/closing device and to perform reliable temperature control without increasing costs significantly.

Structure of the Invention In order to achieve this object, the present invention provides a rectifying weir on the lower surface of the cold air guide part of the damper holding device continuously from the weir in the direction of the weir and the lower part of the flap contact area over the entire width. This prevents condensed water from flowing into the damper opening/closing device body.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. It should be noted that the numbers in the drawings that are the same as those of the conventional example are given the same numbers as those of the conventional example, and the explanation thereof will be omitted. 13 is a damper holding case, and the damper opening/closing device 9 is housed and fixed in the damper holding part 13b with screws or the like. 13a is a cold air guide part;
A weir 13c is provided on the bottom surface over the entire width of the cold air guide section, and the weir 13c is made higher at the center than at both ends.
A rectifying weir 13d is continuously provided diagonally from both ends of the center part of the damper opening/closing device 9, across the contact surface A13g of the flap 9a of the damper opening/closing device 9, to the upper surface 13f of the damper holding part and the contact surface B13h of the heat insulating material 12. be. Further, the damper opening/closing device 9 is fixed,
The damper holding case 13 is held and housed in the temperature control device 8 by the heat insulating material 12, with the contact surface B13h being in close contact with the heat insulating material 12. Also,
The temperature control device 8 is connected to the duct outlet portion 5a of the rectifying duct 5, and the cold air guide portion 1 of the damper holding case 13
3a are fixed at opposing positions with a sealing material in between.

Therefore, the water condensed in the rectifier duct 5 flows from the outlet of the rectifier duct to the cold air guide part 13a, but because of the weir 13c provided on the bottom, it does not flow down to the mounting side of the damper opening/closing device 9. The accumulated condensed water is sublimated by cold air when the system is restarted.
Furthermore, even when a large amount of condensed water comes out, it overflows from both ends of the weir 13c and flows down to the upper surface 13f of the damper holding part without splashing onto the damper opening/closing device 9 due to the flow-reducing weir 13d. It is accumulated and sublimated.

Effects of the Invention As is clear from the above explanation, the present invention has the following effects:
A damper holding device is provided in which a weir is provided on the bottom of the damper holding part with the center part higher than both ends, and a rectifying weir is provided continuously from both ends of the center part of the weir to the upper part of the damper holding part and the contact surface of the insulation material. This prevents condensed water in the duct from falling into the damper opening/closing device, and even if the amount of condensed water increases, the rectifying weir prevents condensed water from splashing onto the damper opening/closing device. Since it prevents condensed water from freezing, there is no need to add a separate heater or drainage parts, and the operation of the damper opening/closing device can be guaranteed and temperature control can be achieved reliably.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a damper holding case showing one embodiment of the present invention, FIG. 2 is a vertical sectional view of essential parts of a refrigerator showing one embodiment of the present invention, and FIG.
FIG. 4 is a longitudinal sectional view of a refrigerator showing a conventional example, and FIG. 5 is a sectional view of essential parts of a conventional refrigerator. 5... Ventilation duct, 8... Temperature control device, 9...
...Damper opening/closing device, 9a...Flap, 12...
...Insulation material, 13...Damper holding case, 13a
...Cold air guide section, 13b...Damper holding section, 1
3c...Weir, 13d...Rectification weir, 13e...Bottom surface, 13f...Top surface, 13g...Abutment surface A, 13
h...Abutment surface B, 14...Air path.

Claims (1)

[Claims] 1. A freezer compartment and a refrigerator compartment that are divided by partition walls, a ventilation duct that communicates the two compartments, and a blower for forcing cold air from the ventilation duct;
A damper opening/closing device that controls the amount of cold air to the refrigerator compartment, and a cold air discharge passage that insulates both the refrigerator compartment and the damper opening/closing device and guides the cold air that has passed through the damper opening/closing device to the refrigerator compartment. a heat insulating material, and a cold air guide that is held by the heat insulating material and has a recessed portion at the bottom that accommodates the damper opening/closing device, and guides cold air from the ventilation duct to a cold air discharge passage of the heat insulating material through a flap portion of the damper opening/closing device. a damper holding case integrally molded on the top;
On the bottom of the cold air guide part of the damper holding case,
A weir is provided across the entire width with the center part higher than both ends, and from both ends of the weir, the flap abutment surface of the damper opening/closing device is provided, and from the upper surface of the damper holding part, the surface that comes into contact with the heat insulating material. A refrigerator equipped with a rectifying weir that is continuously provided up to 1000m, a damper holding device, a damper opening/closing device, and a temperature control device containing a heat insulating material.