JPS5935765A - Transmission circuit for refrigerator signal - 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] [Technical Field of the Invention] The present invention relates to a refrigerator, and in particular, to a refrigerator in which the operation of a compressor and a defrosting heater is controlled by an electronic control circuit, the control signal transmission can be achieved at a practical level. [Technical background of the invention and its problems] Regarding the signal transmission circuit of the electronic control circuit of the refrigerator that reduces the number of signal lines. The control circuit of the refrigerator consists of two circuits: an operating section and a control circuit.The operating section is built into the freezer compartment door or the upper table, and the control section is built into the machine room where the compressor, etc. is located. In particular, in cases where the operation unit is built into the freezer compartment door, the signals of the electronic control circuit must be connected to the control unit through the entire hinge that attaches the main unit and the freezer compartment door. However, considering the balance of the refrigerator, the hinge diameter is limited.Furthermore, the cost of old installations increases due to the large number of signal lines, and there are many unstable factors such as wiring mistakes.

``Object of the Invention'' The present invention has been developed in view of the above-mentioned drawbacks, and the object of the invention is to reduce the signal by converting the signal of a single-child control circuit to a practical level and transmitting it. It is.

[Summary of the Invention] According to the present invention, the signals of the compressor, the solenoid valve, and the defrosting heater necessary for controlling the refrigerator are inputted to a level converter, and the digital signals are converted into a bell signal for the rj4 pressure level. This signal is converted into each digital signal using a comparator in the control section, and each controlled object is set to 0N-OFFI.
, to control the temperature of the refrigerator.

Effects of the Invention As described above, by using the signal transmission circuit, the number of signal lines can be significantly reduced, thereby lowering the wiring cost, and the hinge can be designed to an appropriate size without making any mistakes in wiring.

[Embodiments of the Invention] Referring to the drawings below, embodiments of the present invention will be described in detail from B to F.

FIG. 1 is a sectional view of a schematic overall configuration of an example of a refrigerator equipped with a temperature control device for a refrigerator according to the present invention. That is,
The refrigerator main body 1 is composed of two compartments, a freezing compartment 2 and a refrigerating compartment 3. The freezing chamber 2 has a first cooler 4 on the inner peripheral wall of the chamber.
is installed, and the inside of the freezer compartment 2 is cooled by this cooler 4. A thermistor 5 that detects the indoor air temperature is arranged in the freezing compartment 2, and the temperature detected by the first thermistor 5 causes the compressor 6 provided in the machine compartment 20 to go to zero.
N-OFF control is performed. On the other hand, a cooling device 7 for the refrigerator compartment 3 is arranged. A second thermistor 8 is attached to this second v) cooler 7 to detect the temperature of the cooler 7, and a third thermistor 9 is installed near this thermistor 8 to detect the air temperature in the refrigerator compartment 3. It is located. The second of these. Based on the temperature detected by the third thermistor, solenoid valve 1
o to control the flow of refrigerant to the first and second coolers 4 and 7. The freezer compartment 2 and the refrigerator compartment 3 have a door 12 which can be opened and closed by a hinge 11.
and 13 are installed. Said (fm for Ikuma Muro Na)
A control section 14 comprising an f control circuit is provided,
This control section 14 receives a signal from an operation section 15 configured on the front surface of the door 12 of the freezer compartment 2 and performs a predetermined operation to be described later. In addition, 16 is a freezer compartment control switch, 1
7 is a refrigerator compartment control switch, and each switch 16
.

I7 is provided in the operation section 15. The cooling temperatures of the freezer compartment 2 and the refrigerator compartment 3 are set using these switches. The 1 solenoid valve 1o has a housing 102K into which the valve body ioi is slidably inserted.Ua, IOb,
It has IUc. This valve body 101 is connected to the first port 10
When the magnet coil 103 is energized while remaining stationary at a position where it communicates with the second opening 10h by θS, it slides within the housing 102 so that the liQ opening JOa and the third opening 10c communicate with each other.

When the excitation state of this coil is released, the valve body 101 returns to the position where the first port [Oa] and the second port 10b communicate with each other due to the restoring force of the spring 104 and remains stationary.

In the electromagnetic valve 10 having such a structure, one end of the first capillary tube 18 is connected to the first port 10a.

The other end is connected to one end of the condenser V 9 via the pipe 6b, and the other end is connected to the refrigerant discharge side of the compressor 6 via the pipe 6b. The third port IOC is connected to one end of the second capillary tube 21, and the other end is connected to the inflow side of the first cooler 4 via a pipe 6C. The second port 10b is connected to the refrigerant inflow side of the second cooler 7 via a pipe 6d, and the refrigerant outflow side of this cooler 7 and the refrigerant inflow side of the $1 cooler 4 are connected to a pipe 6e. It is connected. The inflow side of the outflow side stop compressor 6 of the first cooler 4 is connected to the inflow side of the first cooler 4 through a pipe 6f.

The refrigerator of the present invention having the configuration as described above is controlled by the control section 14 and the operation section 15 by a control circuit having a circuit configuration as described below. FIG. 2 is a block diagram showing an example of the refrigerator temperature control device R of the present invention.

That is, the operation section 15 includes a control switch 16.
, L for displaying the temperature in the freezer not shown in addition to 17.
Ii D (1,light Emitting 1)
iode) and L l; D , t of the decapitated display.
Also, set the rapid freezing LBD and defrost start and end r.
A reset switch is provided. The block blade in FIG. 42 is the above-mentioned switch and LED turnout block.

That is, 31 to 33 are the freezer compartment temperature display LE#C, which displays the temperature of the freezer compartment 2. Ah, the Lm displayed when defrosting freezer compartment 2! iD, 35 is Ll;D for quick freezing display, and these LEDs are connected to the control unit 14.
It is destroyed by a signal from the thermostat and drive block 40 installed in the motor. Further, DS is an interrupt switch for starting defrosting of the freezer compartment 2, and DIL is an interrupt switch for interrupting the defrosting midway. Furthermore, Ass is a switch for starting rapid freezing, and As is a switch for interrupting this midway. 37, : The porridge volume is controlled by the control switch 16, 1 provided at the temperature setting chamber of the freezer compartment 2 and refrigerator compartment 3 mentioned above.
．． 7, and these switches l')S, ]
) Signals from the vacuum and volumes 37, 38 are fed to the thermostatic and drive block 40. The block 30 and ft1ll provided in these operation parts
A signal line 39 connecting blocks 400 provided in the i-distribution section 14 is connected through the hinge 11. On the other hand, the thermostat and drive block 40 includes a set of temperature detection circuits 41, 42, 42, and 42, each consisting of a thermistor and a resistor connected in series.
43 is connected to a relay coil 44 for turning on and off the compressor 6, a relay coil 45 for turning on and off the solenoid valve, and a relay coil 46 for turning on and off the defrosting heater. The thermistor connected to the temperature detection circuit 41 corresponds to the first thermistor 5 disposed in the freezer compartment 2 and is connected to the temperature detection circuits 42 and 43.
The thermistors connected to correspond to the second and third thermistors 8 and 9 disposed in the refrigerator compartment 3. Such an external advantage includes block 40 and block J having circuits.
converts the tiilJ control A, cioo(v) into a 1), C6, 2LV) power source for the operation unit and ζ blackness detection unit, and converts it into a l), (,' 12 LV) ill source for the relay coil. and supply it. FIG. 3 is a relay circuit diagram of FIG. 2, and the same parts are designated by the same reference numerals, and the explanation thereof will be omitted. That is, 60 is a 100 (V) outlet 61 is a defrost relay contact, 62 is a defrost heater, 6; 3 is a temperature heater, 64 is a peeking relay, 65 is a combination relay contact, and 66 is an operating unit. 15, il++1 is a control circuit that controls part 14.

Figure 6g4 shows the operation ptr of the signal transmission circuit of the refrigerator of the present invention.
An example of the temperature control section of the refrigerator is shown in the fifth circuit diagram.
The figure is a circuit diagram showing an embodiment of the pusher bell No. 1g transmission circuit of the present invention.

In other words, in Fig. 4, control signals for the compressor solenoid valve and defrosting heater, which are used to control the temperature of the refrigerator, are created.In Fig. 5, each control signal is converted into a relative pressure level signal, and the control unit converts the control signals to the original signals. This is a circuit for converting to .

Refrigerator temperature control has the highest priority, such as defrosting (hereinafter referred to as DEF') operation, and fast freezing (hereinafter referred to as AS), J operation, and normal thermistor temperature control operation.0 When the DEF start switch DS is pressed, the DEF circuit 7
1 turns ON, prohibits L gate 72 and gate 222 from turning OFF, and thereby solenoid valve [hereinafter referred to as MV]] 0 and comparator [hereinafter referred to as konbu] turns OFF L cooling stops C
Defrost heater [hereinafter 1] (to ae, -j-
) 62 b (ON l, defrosting room, hereafter referred to as room F'3
Dr. et al. ) B) 'Release controller 219υ3 Release temperature v+i When F room temperature ■F becomes
This is done by setting the LDBF reset to rLJ. Also, 1) When the WF IJ set switch is pressed, the (+) EF axis operation is canceled regardless of the F room temperature.
1) E) When the circuit 71 is turned on, the count output 15 of the EF circuit 71 becomes "L" and the diode 221 is turned on.The reset terminal of the LAS circuit 76 must be set to -L. The As circuit 76 is a DFiF circuit. OFF while 71 is operating
prohibited.

As start switch ASS is pressed (a) and As circuit 7
6 is ON l, output ■1□ is ON L gate 75, 22
Prohibit 3 to OFF and turn on Mvlo and kelp.
, refrigerant, (t) is allowed to flow to cool the room F. The AS circuit 76 is released when the built-in timer reaches the set time or when the AS reset switch ADD is pressed.

MVIO is controlled by the cooler temperature vE of the refrigerator room (hereinafter referred to as It\4-) and the air 1 crystal +, fl V's.
OF F 1iill 1ull (:, Yes. Comparator 73 detects cooling 50) hood 7iVr. If the cooler temperature V is the shortest temperature V 2 flJ, +3.
When the quotient becomes 5'Cx, the output VI3 of the comparator 7d becomes f-L-1, and the gate 70 and ON K are inhibited, MV J
O's (Finger JFF 2j, that is, turn off MV 40
I, -r, refrigerant 1. - Make sure to circulate in the order of room F.
Cool the room. MV 10 ON is R room air temperature v
When the R room air temperature Vl becomes lower than the set temperature VSP of the conoperator 84, the output v4 of the comparator 84 becomes rLJ, turning on the diode 89 and detecting the cooler temperature VFI. Negative terminal (→ to rLJ, comparator Tough 8 output VI3 to 1-Lj, K) 75 is prohibited from OFF, and MV 10
Turn on. As a result, the refrigerant flows only to F4, and R tail cooling stops. ζ, the conoparator 7B that detects the cooler temperature VB has a temperature level of -40°C, for example +:i, 5'O, and when it detects a temperature of +3.5°C or higher, the next comparison temperature of the comparator 78 is It becomes stable at -40°C.

ON-OFF of kelp addition is controlled by F room temperature VF. The F room temperature VF detection circuit consists of a comparator 216 and a hysteresis circuit that operates when the output (1)9 reaches rHJ.

When the plan F temperature vF becomes lower than the set temperature VSF', the output of the core parator 216 ■9 becomes rHJ 9 gate 2226
oFrK'! Turn off the stop kelp 20. At this time, the restart timer 225 is activated and for a certain period of time, no matter what kind of signal comes, the kelp (I) will not go to 0NLI. co/parator 216
When the output ■ becomes rHJ, the diode 214 turns on.
, by applying hysteresis through resistor 21.3
0ON! lit height<t, -r. For example, if the off temperature is 120°O% and the on temperature is 117°0, then 0N-OF
When the F width is 3 degrees, it is prohibited to the gate 222 and the tip is 2f.
)i(JN-jru.

The above is about the temperature control of the refrigerator, and the operation of the transmission circuit will be explained below.

The control signal for adding kelp in the temperature control circuit is (1), MVIO
The control signal for the D heater 62 is (Ill).
It is. This control signal is input to a voltage level conversion circuit 230, and resistor arrays 226 to 231 are connected to this voltage level conversion circuit 232.
The voltage level set by 26 to 231 is selected.
It is output to COM OUT of the production level conversion circuit 232. This COM OUT is connected to transmission lines 2:3.

This transmission line 233 is manually inputted to comparator r-rays 239 to 242 which convert it into a control signal based on the 41E level of the control section. The outputs of the comparators rrays 239 to 242 are connected to the respective gates) 24: (assuming that a 0DEF operation is performed in which temperature control is performed by turning each relay ON and OFF connected to ~245. At this time r) H signal Only the signal inside ['') (J has a stain pressure and Bell conversion circuit 2:3
2 is done manually. At this time, the signal array becomes [LLiIJ, and the highest level (IC) voltage is selected and output to the transmission line 233. This EG pressure is manually input to four comparators in the control section. Comparator 24 with the lowest level (b)
2 (+) &! child, the (→ terminal of the comparator 241 with the next level (C), the (→ terminal of the comparator 240 with the next level (d) is connected to the (→ terminal of the comparator 239 with the highest level (e) 0 As a result, the output of the comparator is
2 becomes "H", comparator 241 becomes l'HJ, and comparator 239 becomes "IL". This causes gate 245 to r-1-14,I''LJ, !1-LJ, gate 24
4 is f''HJ, rLJ gate 243 by 1-LJ
becomes "■("), and only the D heater 62 is ON to remove silk from the L F chamber.Suppose that the A8 operation is performed next.At this time, the kelp signal ■ and the HV signal furnace become "H", and the voltage level exchange circuit 232. At this time, the signal array is [I
(HLJ) The voltage (C) is selected and output to the transmission line 233. This voltage is input to the comparator. At this time, the output of the comparator 242 is "H"
, the comparator 241 becomes "H", the comparator 240 becomes "H", and the comparator 239 becomes rLJ. As a result, the gate 245 becomes "II" due to [I(j, t"HJ
”, the gate 244 becomes [(J, rHJ, rHj, and the gate 243 becomes rLJ. As a result, Mvlo and kelp addition cool only the NLF chamber.

(1) Section (1)

[Brief explanation of drawings]

Claims (1)

[Claims] In the temperature control device d of the refrigerator, the control signal is converted into a serial level signal at the transmitter and sent out, and this signal is compared and detected by the receiver at the receiver, and each control signal is set to 0N-O.
A refrigerator signal transmission circuit configured to obtain an FF signal.