JPS62255777A - 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] [Object of the Invention] (Industrial Application Field) The present invention provides a refrigerator that has a specification selection room and a switching room, and that cool air is supplied to the compartments through a common cold air supply duct. Regarding.

(Prior Art) In recent years, refrigerators have been equipped with a specification selection chamber in which one of the freezing chamber specification, chilled chamber specification, and refrigerator chamber specification can be selected. Some compartments are equipped with a switching chamber that can be switched between the compartments, and cold air is supplied to the compartments through a common cold air supply duct. In this case, when the switching chamber is set to the quenching chamber specification, the amount of cold air supplied is controlled to be larger than when it is set to the thawing chamber specification or the chilled chamber specification, while the specification selection chamber is set to the freezing chamber specification. When set, the damper device controls the amount of cold air supplied to a large amount, when set to the chilled room specification, the amount of cold air supplied is controlled to a small amount, and when set to the refrigerator room specification, the amount of cold air supplied is further reduced. It is something to control.

(Problem to be solved by the invention) Recently, there has been a need to shorten the time required to reach a predetermined quenching temperature (quenching time) when the switching chamber is set to the quenching chamber specifications. It's getting higher. However, in the above-mentioned case, when the switching room is used as a quenching room, a considerably large amount of cold air is required, but cold air is supplied to the specification selection room and the switching room through a common cold air supply duct. Due to the circumstances, the amount of cold air supplied to the specification selection room tends to be insufficient to the switching room, which is designed for the quenching room, and the actual situation is that it is not possible to shorten the time required for quenching. Met.

Therefore, an object of the present invention is to provide a refrigerator that can shorten the time required for quenching when the switching chamber is used as a quenching chamber.

[Structure of the Invention] (Means for Solving Problems) The present invention has a structure in which when the switching chamber is set to the quenching chamber specification, the supply of cold air to the specification switching chamber is stopped.

(Function) When the switching chamber is set to the quenching chamber specification, the supply of cold air to the specification selection chamber is stopped, thereby eliminating distribution of cold air to the specification selection chamber and increasing the amount of cold air supplied to the switching chamber. As a result, a large amount of cold air can be supplied per unit time to the switching chamber designed as a quenching chamber.

(Embodiment) An embodiment of the present invention will be explained below with reference to the drawings. First, in Figs. A switching chamber 3 and a specification selection chamber 4 are formed on the left and right sides of the middle portion, and a refrigerating chamber 5 is formed in the lower part. Reference numeral 6 denotes a cooler, and 7 a fan for circulating cold air, which are arranged on the back side of the rear partition plate 2a of the freezer compartment 2. The cooler 6 and fan 7 circulate cold air to the areas shown in FIGS. 2 and 3. The freezer compartment 2 is supplied through the cold air supply duct 8 shown in FIG.
．． Switching room 3. It is supplied to the specification selection room 4 and the refrigerator compartment 5. The switching chamber 3 can be switched to a quenching chamber specification, a thawing chamber specification, or a chilled chamber specification. or,
The cold air supply duct 8, as shown in FIG. It has a second air outlet 11 that communicates with the specification selection chamber 4 and a third air outlet 12 that communicates with the refrigerator compartment 5. A fan 13, a heater (not shown), and a first damper device 14 are disposed in the switching chamber 3, and only the fan 13 is energized based on the ON operation of a quenching chamber specification selection switch (not shown) to The fan 13 and the heater are energized based on the ON operation of a thawing chamber specification selection switch (not shown) to defrost the stored items (the thawed items). . The first damper device 14 controls opening and closing of the first air outlet 10 according to the temperature within the switching chamber 3. Reference numeral 15 denotes a second damper device provided in the specification selection chamber 4, which controls opening and closing of the second air outlet 11 according to the set specifications as described below. still,
Reference numeral 16 denotes a third damper device that is provided in the refrigerator compartment 5 and controls the third outlet 12 according to its internal temperature. Now, FIG. 4 shows a drive control circuit that drives and controls the second damper device 15 in the specification selection chamber 4.
This will be discussed below. 16. 17 and 18 are a freezer compartment specification selection switch, a chilled compartment specification selection switch, and a refrigerator compartment specification selection switch, respectively, and these switches 1
6.17 and 18 are triple lock type push button switches, and when one of the switches is turned on, the other switches return to the off position. Reference numeral 19 denotes a temperature sensor consisting of a negative characteristic thermistor provided inside the specification selection chamber 4. This temperature sensor 19 and a voltage dividing resistor 20 are connected in series between the DC power supply terminal VCC and the ground to measure the temperature. A detection circuit 21 is formed. This temperature detection circuit 21 includes a temperature sensor 19 which is a detection voltage output terminal 21a.
A detected voltage is outputted as a temperature detected value V21 from a common connection point between the voltage dividing resistor 2o and the voltage dividing resistor 2o. 22 is a reference voltage generation circuit having voltage dividing resistors 23, 24 and 25;
and a voltage dividing resistor 24 are connected in series between the DC power supply terminal Vcc and ground, and a series circuit of a voltage dividing resistor 25 and an NPN transistor 26 is connected in parallel with the voltage dividing resistor 24. Become. The base of the transistor 26 is connected to a common connection point between the chilled room specification selection switch 17 and the pull-down resistor 27 via a resistor 28. This reference voltage generation circuit 22 outputs a reference voltage from a common connection point between a voltage dividing resistor 23, which is a reference voltage output terminal 22a, and a voltage dividing resistor 24, 25. 16.17 is turned off) and the refrigerator compartment specification is set, the refrigerator compartment temperature reference value Vr determined by the voltage division ratio of the voltage dividing resistor 23 and the voltage dividing resistor 24 is set as the reference voltage, and the switch 17 is turned off. is on (other switches 16.18
is turned off) and the chilled room specification is set, the chilled room temperature reference value Vc (Vc>Vr) determined by the voltage dividing ratio of the voltage dividing resistor 23 and the parallel voltage dividing resistors 24 and 25 is set.
is the reference voltage. 30 is a comparator whose non-inverting input terminal (+) is connected to the detection voltage output terminal 21a of the temperature detection circuit 21, and its inverting terminal (-) is connected to the base/$ voltage output terminal 22a of the voltage generating circuit 22. The output terminal is connected to one input terminal of the OR circuit 31. still,
32 is a resistor for providing hysteresis. The other input terminal of the OR circuit 31 is connected to a common connection point between the freezer compartment specification selection switch 16 and the pull-down resistor 33. The output terminal of the OR circuit 31 is connected to the AND circuit 34.
is connected to one input terminal of the 35 is a relay coil that opens and closes a relay switch (not shown) that turns off electricity to the second damper device 15;
and an NPN type transistor 36, which is a switching element thereof, are connected in series between the DC power supply terminal Vcc and ground. And the base of transistor 36 is resistor 3
It is connected to the output terminal of the AND circuit 33 via 6a.

On the other hand, 37 is a high-level quenching set signal S based on the above-mentioned quenching chamber specification selection switch being turned on.
This is a quenching set signal output terminal that outputs the signal s, and the signal output from this terminal is connected to the clock terminal CK of the D-type flip-flop circuit 38. This first timer circuit 3
8 reads the level of the data terminal each time a trigger signal rising from a low level to a high level is given to its clock terminal CK, outputs a signal at this level from the set output terminal Q, and outputs the signal from the reset output terminal 0. Outputs an inverted level signal. When a rising trigger signal from a low level to a high level is applied to the reset terminal R, it is reset and changes the set output terminal Q to a low level and changes the reset output terminal 0 to a high level. 39 is a timer circuit, which starts counting a predetermined timer time when a trigger signal rising from a low level to a high level is applied to its reset terminal trap, and when the count is up, changes the set output terminal Q from a low level to a high level. Changes to In the flip-flop circuit 38, the set output terminal Q is connected to the reset terminal trap of the timer circuit 39, the reset output terminal 0 is connected to the other input terminal of the AND circuit 34, and the reset terminal R is It is connected to the set output terminal Q of the timer circuit 39.

-1- To describe the action of hydrochloric acid, first, the switching chamber 3 is set to the thawing chamber specification (quick cooling set signal output terminal 37
is at a low level), the amount of cold air supplied to the switching chamber 3 is controlled based on the first damper device 14 so as to meet the specifications of the thawing chamber. At this time, since the flip-flop circuit 38 is in the reset state, a high level signal is applied from the reset output terminal 0 to the other input terminal of the AND circuit 34. On the other hand, the specification selection compartment 4 is set to one of the freezer compartment specification, chilled compartment specification, and refrigerator compartment specification by each of the selection switches 16 to 18, and when the freezer compartment specification selection switch 16 is turned on, When the specification is set, a high level signal is given to one input terminal of the OR circuit 31, and the OR circuit 31 receives a comparator 30 at one input terminal.
Outputs a high level signal regardless of the signal given from.

As a result, the AND circuit 34 always outputs a high-level signal from its output terminal to turn on the transistor 36, and the relay coil 35 is energized to turn on the second damper! j device 15 is controlled to be in an open state. Therefore, the amount of cold air supplied to the specification selection chamber 4 becomes large. Further, when the specification selection chamber 4 is set to the chilled chamber specification by turning on the chilled chamber specification selection switch 17 (the freezing chamber specification selection switch 16 is turned off), the voltage dividing resistor 25 is enabled by turning on the transistor 26. Ru. As a result, the reference voltage in the reference voltage generation circuit 22 becomes the already mentioned chilled room temperature reference value Vc.

The comparator 30 compares this chilled room temperature reference value Vc with the temperature detection value V21 from the temperature detection circuit 21, and outputs a high level signal or a low level signal from its output terminal according to the comparison result. It is applied to the base of an l transistor 36 via an OR circuit 31 and an AND circuit 34.

Therefore, the transistor 36 is turned on and off as appropriate based on the output signal from the comparator 30, the relay coil 35 is turned on and off as appropriate, and the second damper device 15 is controlled to open and close. Therefore, the amount of cold air supplied to the specification selection chamber 4 becomes small.

Further, when the refrigerator compartment specification selection switch 18 is turned on and the refrigerator compartment specification is set, the other switches 16 and 17 are turned off, so the transistor 26 is turned off, and therefore the reference voltage in the reference voltage generation circuit 22 is set as described above. Refrigerator room temperature reference value V
It becomes r. This refrigerator room temperature reference value Vr and temperature detection value V2
1 by the comparator 30, and based on the comparison result, the opening and closing of the second damper device 15 is controlled in the same manner as in the case of the double series. In this case, since Vc>Vr, the second damper device 15 is closed more often, and the amount of cold air supplied to the specification selection chamber 4 is further reduced.

Now, when the quenching specification selection switch is turned on and the switching chamber 3 is set to the quenching chamber specification, the quenching set signal output terminal 37
rises to a high level, and the rapid cooling set signal Ss is applied to the clock terminal CK of the flip-flop circuit 38.

As a result, the flip-flop circuit 38 sets its set output terminal Q to a high level and sets its reset output terminal 0 to a low level. This high level signal from the set output terminal Q causes the timer circuit 39 to start counting the predetermined timer time, and since the low level signal from the reset output terminal 0 is applied to the other input terminal of the AND circuit 34, the OR circuit 39 starts counting the predetermined timer time. The output signal applied from the output terminal of the circuit 31 to one input terminal of the AND circuit 34 is invalidated, and the AND circuit 34 outputs a low level signal. As a result, the base of the transistor 36 is brought to a low level, the transistor 36 is turned off, and the first damper device
f15 is operated to close. As a result, the supply of cold air to the specification selection chamber 4 is forcibly stopped. This eliminates the distribution of cold air to the specification selection chamber 4, increases the amount of cold air supplied to the switching chamber 3 per unit time, and shortens the time required for rapid cooling to a predetermined rapid cooling temperature. Therefore, the timer circuit 39
When it counts up, its output terminal Q is raised from low level to high level, so a trigger signal for rising of the reset terminal R of the flip-flop circuit 28 is given, this flip-flop circuit 38 is reset, and its reset output Terminal 0 changes to high level. As a result, the other input terminal of the AND circuit 34 becomes high level, so the output of the OR circuit 31 is enabled.
Cold air is supplied to the specification selection room 4 so that it meets the set specifications.

According to this embodiment, when the switching chamber 3 is set to the quenching chamber specification, the supply of cold air to the specification selection chamber 4 is stopped. The quantity can be increased, and the time required for rapid cooling can be shortened. In experiments conducted by the present inventor, the required quenching time was reduced as follows in comparison with the conventional method.

Two bottles of beer (large bottles) with an original temperature of 25°C are stored in the switching chamber 3 as quenched Kawanami storage material, and the beer is quenched at a target temperature of 10°C.
℃, the room temperature is 20℃, and the time from the stop to the start of cold air supply to specification selection room 4 (
The timer time of the timer circuit 39 is set to only 15 minutes.

(I) When the specification selection room 4 is a freezer specification and the switching room 4 is set to a quenching room specification, it conventionally takes 60 minutes (when the cold air supply to the specification selection room 4 is not forcibly stopped). In contrast, in this embodiment, it takes only 55 minutes.

(n) When the specification selection chamber 4 is a chilled room type, and the switching chamber 4 is set to a quenching chamber specification, conventionally (when the cold air supply to the specification selection chamber 4 is not forcibly stopped), it takes 50 minutes. However, in this example, it only took 48 minutes.

If the time from the cold air supply stop to the release (the timer time of the timer circuit 39) is further extended from the above 15 minutes, the time required for quenching the stored limbs to the quenching target temperature can be further shortened.

In particular, what is clear from the above-mentioned experimental results is that when the specification selection chamber 4 is set to the freezer specification, the time required for quenching can be greatly reduced.

In the above embodiment, the timer circuit 39 is used to control the time to release the stoppage of cold air supply to the specification selection chamber 4, but this may also be done based on the temperature detection of the switching chamber 3. good.

However, such stop release control may be performed as necessary, and when the quick cooling chamber specification is set without providing a stop release control means, the cold air supply to the specification selection chamber 4 is uniquely controlled. It may be stopped.

The pond water invention is not limited to the above embodiments, and can be implemented with various changes without departing from the gist.

[Effects of the Invention] As is clear from the following description, the present invention is designed to stop the supply of cold air to the specification selection chamber when the switching chamber is set to the quenching chamber specification, thereby reducing the time required for quenching. It has the excellent effect of being able to shorten the time.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional front view of the entire refrigerator, FIG. 2 is a longitudinal sectional back view showing the cold air supply duct, FIG. It is an electrical circuit diagram. In the figure, 1 is the original body, 3 is a switching chamber, 4 is a specification switching chamber, 8 is a cold air supply duct, 14 is a first damper device, and 15 is a second damper device.
damper device, 16 is a freezer compartment specification selection switch, 17 is a chilled compartment specification selection switch, 18 is a refrigerator compartment specification selection switch, 21 is a temperature detection circuit, 22 is a basic voltage generation circuit,
30 is a comparator, 35 is a relay coil, 37 is a quenching set signal output terminal, 38 is a flip-flop circuit, 3
9 is a timer circuit.

Claims (1)

[Claims] 1. Freezer compartment specifications, chilled compartment specifications, and refrigerator compartment specifications,
It is equipped with a specification selection chamber that can be selectively set to one of the specifications, and a switching chamber that can be switched to either the quenching chamber specification or another specification, and cold air is supplied to the specification selection chamber and the switching chamber through a common cold air supply duct. At the same time, the amount of cold air supplied to the specification selection chamber and the switching chamber is controlled according to the respective set specifications, and when the switching chamber is set to the quenching chamber specification, the specification is A refrigerator characterized in that the supply of cold air to a selection room is stopped.