JPS58102064A - Refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for cooling a freezer compartment by supplying air cooled by a main cooler to a freezer compartment using a blower, and an auxiliary cooler is provided in the refrigerator, and a cooling medium is used as a refrigerant, such as R. -12 and R-
Using a non-azeotropic mixed refrigerant of 1381 and 1381, the condensed refrigerant is discharged from the compressor and heated to the main condenser. It is separated into R-137N, which has a low boiling point and relatively low evaporation moisture content, and 1 Rr-12 is evaporated in the main cooler. Immediately (= When it becomes necessary to freeze the R-1381, which has not yet been condensed and has become a gaseous refrigerant in the gas-liquid separator,
Evaporation of R-12 (: Therefore, after condensing in the main cooler, which is at a low temperature, it is poured into an auxiliary cooler, where the above article is strongly cooled with C2, and further cooled with cold air from the main cooler. The purpose is to freeze it quickly.

Embodiments of the present invention will be described below based on the drawings.

(1) is a so-called two-warm type refrigerator, and the inside of it is kept at freezing temperature by a partition wall (2).
and a refrigerator compartment (4) that is kept at a temperature higher than the freezing point. (5) is a cooling chamber (6) formed between the partition wall (2) and the IQIM chamber bottom plate which is bifurcated upward with a 90-degree spacing from the partition wall (2). 7) is stored.

(81 is the air cooled by the main cooler (7) to the freezer compartment +31
The freezer compartment (
3), cold air is directly discharged from the front of the blower (8),
In addition, the cold air that has descended through the duct +91 is sent to the cold acid chamber ζ4) and circulated as shown by the arrow. αO is the cold acid chamber (4
) is a damper device that opens and closes the cold air discharge port portion to Mi[m+4> in (9) according to the temperature of the duct). I is electric pressure 11S11. (12 is the main condenser, and a3 is, for example, a so-called roll-bond system with a refrigerant passage formed between two metal plates. There is.

Figure 112 shows the refrigerant circuit. First, in this embodiment, a mixed refrigerant of R-12εR-1381 having different boiling points is used. Also, the electric compression sII is the R-1 used in ordinary cold carpet warehouses.
This is an electric compressor for 2. Now, the mixed refrigerant discharged from the electric compressor
), R-15B1 remains as a gas and undergoes gas-liquid separation a
Enter 1m on the gas reservoir side (14h) of aa. Liquid side (
14a) passes through the capillary tube (to) the main cooling 5 +
The input side C2 of 71 is connected. The piping is auxiliary and cooled via the capillary tube aη via the capillary tube @! Connected to the entrance side of 1a3. Gas-liquid 1III vessel a
The gas reservoir side (14A) of No. 4 is connected to the condensing pipe (14A) which is provided in the main cooler (7) for thermal conduction. 1)
It is connected to the inlet side of the auxiliary cooler (Ll) via tube (2).

Main cooling! +71 and the outlet side of the auxiliary cooler 0 are connected to the expansion tank via an accumulator @ as a refrigerant reservoir, and then return to the electric compression sI■.

J Here, since R-111 is used as the refrigerant in the expansion tank, it is used to prevent the pressure in the refrigerant circuit from rising rapidly. This is an electric heater for frost.

Figure @3 is an example of an electric circuit.
Temperature IWP II in the freezer compartment 13) with a thermostat
Electric pressure @ 11 (11) Nomo-9 (11M) is controlled in response to either the temperature of the cold air discharged to the JI room (3), e2B is a defrost timer device and switch (25α)
The switch (25
Close @). As a result, the electric heater (c), the first flow path control wire Wla4, and the relay coil (to) are energized.

The electric heater (to) generates heat and heats the main cooler [7] to start defrosting, and @1 flow path control VI position αQ closes the refrigerant circuit. Here, the first flow path control device Oe is energized and closed, and when not energized, the refrigerant circuit is opened. In addition, the relay coil (2) is energized and the relay switch (26α) switches from the contact (α) to (Al), and the power to the defrost timer (to) and blower motor (8M) is stopped, and the normally closed contact C264
) opens, making it impossible to energize the 1!2 flow path control device α9, and closing the normally open contact (26C) to close the compression m motor (11&).
In the subsequent circuit, the thermostat (: becomes a comb that is energized regardless. Also, the relay coil (to) self-holds and maintains energization to the electric heater (to) and @1 flow path control is*ta. It is a self-resetting type lagoon! detector that opens when it senses the defrosting end temperature of the main cooler (7). (28g)
And (281 is a switch included in the detection device (to) that operates by detecting the humidity of the auxiliary cooler (to). When the temperature of auxiliary cooling!! 0 rises to a predetermined high temperature, the switch (
28G) is closed, the switch (281 is open, and when the temperature drops to a predetermined temperature, the switch (28a) is opened and the switch (281) is closed.
28 Todoroki) is closed. Switch (21M) is 2
The circuits operate at the same time, close and energize the II2 flow path control device a9; the second thermostat (to) is bypassed and the subsequent circuit is energized regardless of the thermostat @.

'@2 flow path flow control device α9 The refrigerant circuit is energized to open the refrigerant circuit and close when de-energized. In the above configuration, @1 (2) In the normal cooling operation mode, the relay switch (26α) is connected to the contact (al). Closed and normally open contacts (
26e) is open, switch (28G) is open, and (28
Since f) is closed, the compressor motor (11m), blower motor (8M), and defrost timer Wl [(to) are operating under the control of the thermostat @, and the first flow path control III device α is is open, and the second flow path control device (to) is closed. Therefore, most of the R-12 in the gas-liquid separator flows into the main cooler (7) due to the flow resistance of the bale whose pressure is reduced by the capillary tube (1) and the capillary tube (a). In addition, R-1381 does not flow to the auxiliary cooler (to), so virtually no refrigerant flows to the auxiliary cooler (to), and R-12 evaporates in the main cooler (7) inside the refrigerator. What to do I: Therefore, the main cooler (7) is cooled, and the air cooled by the main cooler (7) is circulated by the blower (8) to be cooled.

@2 &: In the above normal operating state, when foods that require quick freezing or items to be frozen such as ice cube trays are placed on the auxiliary cooler υ, the warm temperature of the auxiliary cooler (to) increases. The humidity detection device (to) detects this and the switch (28-) closes.
The switch (281) opens, and at this time the contact (26II) is closed, so @2 flow path control I guard (2) opens and R-1381 in the gas-liquid separator (2) is in the condensing pipe (to). It is cooled and condensed by the main cooler (7), is depressurized by the capillary tube ω, flows into the auxiliary cooler 0, and evaporates there.

Therefore, the articles on the auxiliary cooler 0 are strongly cooled by the evaporation of R-111, and rapidly frozen by receiving the cold air from the main cooler (7). That is, at this time the main cooler (
7) also works as a so-called cascade condenser, and since 281 is open, the defrost timer device (to) does not operate at this time, so defrosting is not started during the rapid cooling operation.

Thirdly, the normal operating state of @1 mentioned above is sharpened and the defrost timer (
When (To) completes the integration, the switch (25@) closes and the electric heater (To), IiI flow path control device a, and relay coil e! AC power is turned on and defrosting is started. As a result, the integration of the defrost timer (total) and the blower motor (8m) are stopped, while the contact C260> is closed.
l(2) also remains closed. As a result, R-12 in the gas-liquid separator I flows into the auxiliary cooler through the capillary tube αη and evaporates there. Even during the defrosting operation of the main cooler 10 (73), items on the auxiliary cooler (73) or in the freezer compartment (3) are cooled.

In this example, the start and end of the rapid IQI freezing operation is controlled by the temperature detection device (C: YO), but the start is manually controlled.
A timer device that operates simultaneously may be used to carry out rapid freezing for a fixed period of time.Also, although a mixed refrigerant of R-12 and lSB1 is used as the refrigerant, the present invention is not limited to this. -12 and R-13, or R-12 and R-22, etc.)

The present invention is configured as described in 1 and provides auxiliary cooling inside the freezer compartment! A mixed refrigerant with different boiling points is used as the refrigerant, and the refrigerant, which usually has a relatively high boiling point, is evaporated in the main cooler and the inside of the freezer compartment is indirectly cooled by a blower.

When food or water in an ice cube tray is to be rapidly frozen, those items are placed on an auxiliary cooler and a refrigerant with a relatively low boiling point is flowed through the auxiliary cooler to evaporate it.

The above-mentioned article is powerfully cooled, and is also rapidly frozen by receiving cold air from the main cooler, thereby achieving rapid freezing and rapid ice making. Also, since the main cooler works as a condenser for low boiling point refrigerants at this time, there is no need for a special condenser or high-output compressor, and the frost that builds up on the auxiliary cooler during rapid freezing operation can be removed during normal operation. The cold air C from the main cooler is removed by sublimation, so the auxiliary cooler can also be maintained in a good hazy condition at all times.

[Brief explanation of the drawing]

Each figure shows an embodiment of the present invention; FIG. 1 is a side sectional view of a cold iIH, and FIG. 2 is a refrigerant circuit diagram. '@ Figure 3 is an electric circuit diagram, and Figure 4 is a diagram showing the operating status of the flow path controller 11VI. (3)... Freezer compartment, (7)... Main cooler, (8)...
...Blower, ■...Main S-value device, a3...Auxiliary cooler, (141...Gas-liquid separator, α/α9...Flow path control a device. Fig. 3 Fig. 4

Claims (1)

[Scope of Claims] L In an apparatus in which cold air cooled by a main cooler provided in a cold III JII is withdrawn and circulated into a cold *'iii, an auxiliary device provided in the freezing chamber. a cooler, and a main condenser (a gas-liquid separator that separates the condensed non-co-S mixed refrigerant discharged from the compressor). Flow path control I\I [from which acid amount 1. A cooling jI device characterized in that it is configured to condense in the main cooler and then evaporate in the auxiliary cooler.