CN1010883B

CN1010883B - Controlling device for refrigerator

Info

Publication number: CN1010883B
Application number: CN 88106454
Authority: CN
Inventors: 板垣政也
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 1985-09-25
Filing date: 1986-08-30
Publication date: 1990-12-19
Also published as: HK34290A; GB2180962B; GB2180962A; SG4990G; AU6307786A; CN1040676A; CN86105354A; CN1004726B; GB8622955D0; AU586500B2

Abstract

The present invention relates to a control device for a refrigerator. A large quantity of foods stored in a refrigerating chamber can be rapidly cooled by simple operation and can be automatically held at an optimum temperature. The device comprises a rapid refrigeration switch, a control device and a temperature detector of outside air, wherein the control device is used for forcibly reducing a preset temperature in a refrigerator in order to execute rapid refrigeration operation of the refrigerator; the rapid refrigeration operation executed in this way, is stopped after the switching on/off number or time process of an adjustable air door achieves a preset value; the temperature detector of outside air is used for reducing a preset temperature according to a temperature of outside air.

Description

Controlling device for refrigerator

The present invention relates to a kind of controlling device for refrigerator, make the quick refrigeration of refrigerating chamber of refrigerator by the opening and closing damper.

Typical conventional controlling device for refrigerator comprises an electric refrigerator housing body, comprises a refrigerating chamber, a refrigerating chamber and a fruit and vegetable chamber in the casing.These several chambers are separated refrigerator inside.Refrigerating chamber is positioned at below the refrigerating chamber, the fruit and vegetable chamber above.Compressor is located at the bottom of casing, and cooler is located at refrigerating chamber inside, and fan is located at above the cooler and with the driving electric notor and is connected, and air duct leads to refrigerating chamber from the rear portion of cooler.The gaseous type adjustment air door that comprises a main body and a baffle plate is located near the air outlet of the air duct that leads to refrigerating chamber.

In the use, when compressor operating, fan also rotates and makes the cold air that has passed through cooler directly be blown into refrigerating chamber and air duct.In this case, if the temperature of refrigerating chamber is higher than preset value, the adjustment air door will detect and open baffle plate and allow a large amount of cold air be blown into refrigerating chamber to make the inner cooling of refrigerating chamber, otherwise, when if the temperature in the refrigerating chamber is lower than preset value, the baffle plate of adjustment air door can be closed the cold air total amount that is blown into refrigerating chamber with minimizing a little, and in this control device, the refrigerating chamber temperature inside is maintained at the temperature that presets.

Aforesaid conventional controlling device for refrigerator contains various problems: be conditioned in order to the temperature in the control refrigerating chamber owing to be blown into the cold air total amount of refrigerating chamber, even when a large amount of foods add to refrigerating chamber, cooling velocity can not improve yet, the prerequisite that therefore must change the adjustment air door could increase cooling velocity,, in order to increase cooling velocity, the adjustment air door must be placed " by force " shelves, if but allow the adjustment air door rest on " by force " shelves, the food that is stored in the refrigerating chamber will freeze, therefore, after the adjustment air door being arranged " by force " shelves, it must be transferred to normal condition again.

One object of the present invention is to provide a kind of controlling device for refrigerator, when a large amount of foods are added to refrigerating chamber, and by a shirtsleeve operation, just cooling beverage or food fast.

Another object of the present invention is to provide a kind of controlling device for refrigerator, and it can make a large amount of foods cool off fast, and can automatically be remained on optimum temperature after its cooling.

Further aim of the present invention provides a kind of controlling device for refrigerator, and it can eliminate the change of o.a.t to storing the harmful effect of food in the refrigerator.

According to controlling device for refrigerator of the present invention, wherein, cold air by the cooler cooling blows into refrigerating chamber by an air-supply arrangement, enter the air capacity of refrigerating chamber, regulate by opening and closing damper according to the temperature in the refrigerating chamber, so that make the temperature in the refrigerating chamber be controlled to a preset temperature, this controlling device for refrigerator comprises: a quick refrigeration switch; An extraneous air detector that is used for measuring external air temperature; Can work and reduce the control device of the preset temperature of refrigerator according to the output signal of external air temperature detector with the action of quick refrigeration switch for one; The control device of the preset temperature of this reduction refrigerator is included in the process with the quick refrigeration operation that reduces the refrigerator that preset temperature begins, in order to detect the checkout gear that time that number of times that damper opens and closes motion reaches a predetermined value or refrigeration work fast reaches the scheduled time, and the detection signal that can respond self-test device, send the quick refrigeration arresting stop that instruction stops the quick refrigeration operation of refrigerator.

Therefore, if open quick refrigeration switch, the preset temperature of refrigerating chamber reduces according to outside air temperature, makes the quick refrigeration of refrigerator to reduce the temperature in the refrigerating chamber, if then reaching predetermined requirement in the refrigeration operating process fast, the quick refrigeration operation of refrigerator stops.

Therefore, after the refrigeration operation begins fast, in quick refrigeration operation, when the number of times that opens or closes action reaches predefined value or when the time that quick refrigeration is operated reached predefined time, the quick refrigeration of refrigerator just stopped.So, even add when storing up in the refrigerating chamber when a large amount of foods; Food also can be cooled off fast, and can stop sub-cooled when externally air themperature is too low.

Fig. 1 is a block diagram, has provided according to the present invention the instantiation of controlling device for refrigerator;

Fig. 2 is the cutaway view that has used the refrigerator of control device of the present invention;

Fig. 3 is circuit theory diagrams, and the circuit structure of control device among Fig. 1 has been described;

Fig. 4 is the block diagram of microcomputer among Fig. 3;

Fig. 5 is a flow chart, and the whole flow process of Fig. 1 control device work has been described;

Fig. 6,7 and 8 is a flow chart, has provided the details in the output program of temperature input program, input-signal judging program and damper among Fig. 5 respectively;

Fig. 9 is the vertical sectional view of a typical conventional controlling device for refrigerator.

A representative instance of conventional controlling device for refrigerator at first, is described with reference to Fig. 9.Shown refrigerator comprises an electric refrigerator housing body 1, and one of them refrigerating chamber 2, a refrigerating chamber 3 and certain dish chamber 4 are separated by box house and formed.The compressor 5 of a compression cooling medium is located at the bottom of electric refrigerator housing body, cooler 6 is located in the cooling chamber that refrigerating chamber 2 inside separate, fan 7 is located at above the cooler 6 and with its driving electric notor 8 and is connected, cold air is sent into gas type adjustment air door 10 that the air duct of refrigerating chamber 3 or air supply duct 9 lead to temperature in 3, one adjusting refrigerating chambers of refrigerating chamber 3 from the rear portion of cooler 6 to be located near the air outlet of the air duct 9 that leads to refrigerating chamber 3.Adjustment air door 10 comprises a housing 10a and a plate washer 10b.

Now, referring to figs. 1 through 8, describe a instantiation in detail according to controlling device for refrigerator of the present invention.

At first, with reference to Fig. 2, the refrigerator that has used control device of the present invention is described.Among Fig. 2, with reference to the represented parts of label 1 to 9, to top with reference to the similar of the described conventional equipment of Fig. 9 or be equal to.The refrigerator that Fig. 2 provides comprises an electric refrigerator housing body 1, wherein, the 2nd, refrigerating chamber, the 3rd, refrigerating chamber, the 4th, fruit and vegetable chamber.Refrigerating chamber 3 be located at refrigerating chamber 2 following fruit and vegetable chamber 4 above.Compressor 5 is located at the bottom of electric refrigerator housing body 1, cooler 6 is located at refrigerating chamber 2 inside, fan 7 is located at above the cooler 6 and with its driving electric notor and is connected, the stretching, extension that faces down behind the cooler 6 of fan pipeline or air duct 9, electricity with baffle plate 21a drives damper 21 and is located at the relative position of air-supply outlet with the air duct 9 that leads to refrigerating chamber 3, thereby and dresses up and can do to open and close motion and allow or block cold air and pass through.The temperature of refrigerating chamber detector 14(that is used for detecting temperature in the refrigerating chamber 3 is a thermistor for example) be located near the damper 21, control device 22 is accommodated in the upper rear of electric refrigerator housing body 1, on the door 24 of the refrigerating chamber 2 that guidance panel 23 is installed.One quick refrigeration switch 12, a quick refrigeration indicator lamp 18 and the variable resistance 25 that setting refrigerating chamber 3 temperature are used that is made of light emitting diode or similar thing are arranged on the guidance panel 23.

Referring now to Fig. 1, Fig. 1 is a block diagram, has provided total part structure of complete controlling device for refrigerator.This control device comprises quick refrigeration switch 12, external air temperature detector 13 and temperature of refrigerating chamber detector 14.According to the signal that receives from external temperature detector 13, under control device 16 controls, the preset temperature of refrigerating chamber 3 is reduced device 15 by preset temperature and reduces, the latter receives the output signal of quick refrigeration switch, damper 21 is opened or closed by the damper relay drive circuit 17 that the response preset temperature reduces the output of device 15 and temperature of refrigerating chamber detector 14, reaches a lower preset temperature with the temperature of controlling refrigerating chamber 3.Simultaneously, refrigeration indicator lamp 18 is lighted fast.When the opening and closing times of exercise of damper reached preset value, refrigeration arresting stop 19 beginning executable operations close damper 21 by damper relay drive circuit 17, and indicator lamp 18 extinguished fast.

Referring now to Fig. 3, Fig. 3 is the circuit theory diagrams of Fig. 1 control device circuit, and control device 22 comprises a microcomputer 26, and microcomputer 26 comprises a CPU (CPU) 26A, memory 26B, and input circuit 26C and output circuit 26D are shown in Fig. 4 block diagram.With input circuit 26C joins quick refrigeration switch 12 arranged, set variable resistor 25, temperature of refrigerating chamber detector 14, external air temperature detector 13 and the resistance 27 to 29 of temperature of refrigerating chamber.What be connected with output circuit 26D simultaneously, has damper relay drive circuit 17, compressor relay drive circuit 30 and an indicator lamp 18 by current-limiting resistance 31.Resistance 27 to 29 is respectively the divider resistance of variable resistor 25, temperature of refrigerating chamber detector 14 and external temperature detector 13, and is used for respectively preset temperature, temperature of refrigerating chamber and the external air temperature of refrigerating chamber are sent into microcomputer 26.The place that is omitted of air sensor 13 externally, resistance 29 also can save and the end away from variable resistor 25 of resistance 27 can be connected to a end away from the resistance 28 of temperature of refrigerating chamber detector 14, and compressor relay 32 is connected with compressor relay drive circuit 30.When compressor continued device 32 energisings, its contact 32a closure allowed AC power 33 to compressor 5 and air-supply arrangement 8 power supplies.Simultaneously, damper relay 34 is connected with damper relay drive circuit 17, and when 34 energisings of damper relay, contact 34a closure makes AC power 33 power supplies give damper 21.

Now, be described with reference to the job step of flow chart embodiment recited above.Flow chart 5 to 8 has illustrated the program among the memory 26B that is stored in microcomputer 26.At first with reference to Fig. 5, Fig. 5 has provided the complete control flow step of control device, and this program comprises step 100, and it just works after power supply 33 is connected, and in this step 100, microcomputer 26 is initialised.The step 200 that connects forms one normally in the major cycle of passing through in service of control device to 600 down.In step 200, obtain digital input signals such as the input signal that receives from quick refrigeration switch 12, in step 300, obtain analog input signal, be admitted to microcomputer 26 such as input signal from temperature of refrigerating chamber detector 14 outside air temperature detectors 13 and variable resistor 28.Then, in step 400, judge input signal according to such input data, and in step 500, the output signal of the joint air door 21 of setting the tone afterwards, in step 600, is finished a series of Timing Processing, after the mansion kind was handled, program was returned step 200.

Referring now to Fig. 6.It provides the details of step 300 reception temperature input signal in the flow chart 5.In receiving the step 300 of temperature input signal, at first, read in the voltage that is added to temperature of refrigerating chamber detector 14, the voltage value data that will convert temperature in step 301 is admitted among the temperature of refrigerating chamber register Ta then.Simultaneously, in step 302, the voltage that is added to variable resistor 18 is converted into preset temperature, and in step 303, external air temperature is admitted to an air themperature register Tg equally, in the place of the influence that can ignore external air temperature, can save step 303.

Now, with reference to Fig. 7 process when pressing quick refrigeration switch 12 is described.Fig. 7 has provided the details of determining step 400 among Fig. 5.In input-signal judging step 400, step 401 judges whether that quick refrigeration switch 12 has been pressed, when it finds that switch 12 has been pressed, judges that in step 402 one prevents to read for twice sign F1, at F1 is that 0(reads for the first time) situation under, will indicate the F1 set in step 403.Owing to after this indicate that F1 is judged as " 1 ", the process after the step 403 is just crossed, that is, prevented to read for the second time.Then in step 404, judge quick refrigeration sign F2, F2 is " 1 " when sign, being judged as in quick refrigeration operation fast, refrigeration switch 12 is pressed again, therefore, in step 405, refrigeration sign F2, is descended together to stop quick refrigeration and to extinguish indicator lamp 18(in step 406 and represent with LED in the drawings by reset fast).On the contrary, when sign F2 was judged as " 0 ", quick refrigeration sign F2 set was to start quick refrigeration and light indicator lamp 18 in step 408 in step 407.

Then, with reference to Fig. 8, will be described in detail motorized adjustment air door output signal step 500 among Fig. 5.In motorized adjustment air door output step 500, step 501 judges whether refrigerator is in quick refrigeration condition, after the discovery refrigerator is to be in quick refrigeration condition (F2=" 1 "), step 503 judges whether external air temperature is lower than 10 ℃, when external air temperature is lower than 10 ℃, set up a value in step 504 than low 1.5 ℃ of preset temperature Ts, otherwise but, when external air temperature is higher than 10 ℃, set up a value than preset temperature Ts low 3.0 in step 505.In the negligible occasion of the influence of outside air temperature,

step

503 and 504 or 505 can be saved, thereafter step 506 judgement motorized adjustment air door 21 is in the open position at present or is in the closed position, at motorized adjustment air door 21 is under the situation about being in the open position, in step 507, from present temperature T s, deduct the temperature T a in the refrigerating chamber 3, judge that then whether this difference is greater than 1 degree.

If difference promptly turns to step 509 to judge whether refrigerator is in quick refrigeration condition greater than 1 degree, when finding that refrigerator is that step 501 makes counter C1 add 1 when being in the quick refrigeration.Then, step 511 judges whether the value of counter C1 equals 3, and when the value of counter C1 was 3, step 512 stopped quick refrigeration the F2 reset, extinguishes indicator lamp 18 in the step 513.On the contrary, when judging that in step 506 damper 21 is to be in the closed position, in step 514, just from temperature of refrigerating chamber Ta, deduct preset temperature Ts and judge that its difference whether greater than 1 degree, when difference is spent greater than 1, sends an output signal of opening damper 21 in step 515.

In this device, what the quick refrigeration operation of refrigerator was carries out by force with the action of quick refrigeration switch 12, and after refrigerating chamber is sufficiently cooled, refrigeration operation cancellation automatically fast.In this case, because operate the front that quick refrigeration switch 12 is located at the door 24 that can open and close, can easily start, because the operation of quick refrigeration switch has the indicator lamp indication, this is very useful for the user in addition.

Further, refrigerator is placed under the situation of quick refrigeration condition pressing quick refrigeration switch 12, preset temperature is reinitialized lower value when being lower than 10 ℃ when external air temperature, reduction amplitude less (being 1.5 degree in an embodiment) then reduces with bigger amplitude (being 3 degree in an embodiment) when external air temperature is higher than 10 ℃.Therefore, damper 21 is with fixing difference controlled (being ± 1 degree) among the embodiment.When damper 21 cut out three times, refrigeration was automatically removed fast.So, even when external air temperature low, when carrying out quick refrigeration, also can avoid sub-cooled.

Please note, though as described in above instantiation, stop quick refrigeration and be determining by the counting that damper 21 is opened and closed the number of times of motion and preset temperature can change with respect to the change of external air temperature, if but use a timer of measuring the quick refrigeration time instead, also can play similar effect, finish quick refrigeration when arriving preset time, and the preset time of timer can change according to the variation of extraneous air with time of convenient timer measuring.

In addition, if use the system of timer to use, also can obtain same effect with the system that utilizes the opening and closing times of exercise of going up velocity modulation joint air door 21.

Claims

1, a kind of controlling device for refrigerator, wherein the cold air by the cooler cooling is admitted to refrigerating chamber by an air-supply arrangement, and according to the temperature in the described refrigerating chamber, make damper open and close the air capacity of sending into described refrigerating chamber with adjusting and control temperature to a preset temperature in the described refrigerating chamber, this device comprises quick refrigeration switch, and one can be worked to reduce the control device of described refrigerating chamber preset temperature according to the action of described quick refrigeration switch; It is characterized in that the external air temperature detector of said temperature detector for the temperature of detection extraneous air; The control device of above-mentioned reduction preset temperature is that the output signal according to described external air temperature detector reduces described refrigerating chamber preset temperature, and be included in the reduction of response preset temperature and detect the checkout gear whether operating time that whether number of times that described damper opens and closes motion reach a predetermined value or refrigeration fast reaches a predetermined value in the quick refrigeration operating process of the described refrigerator that begins, with one can be according to detection signal from described checkout gear, send the quick refrigeration arresting stop that an instruction stops the quick refrigeration operation of described refrigerator.

2, according to the controlling device for refrigerator of claim 1, its feature further comprises the display unit of the quick refrigeration operation of the described refrigerator of demonstration in operation.