CN2097384U - Device for prompting closing door of refrigerator - Google Patents

Abstract

The utility model discloses a device for prompting closing door of a refrigerator, comprising a power device, a delayer, and a speech device. The utility model is connected in parallel with both ends of an illuminating lamp in the refrigerator by two conducting wires. The utility model obtains the door opening state signals of the refrigerator and the 220 v mains supply by utilizing the switch and the electrical return circuit of the illuminating lamp, and the 220 v mains supply is converted into stable low-voltage direct current which is supplied to a delayed trigger and the speech device to simultaneously start the delayer by the power device when the door of the refrigerator is opened and the illuminating lamp lights. When the door of the refrigerator is opened over 15 minutes, the delayer can trigger the speech device to send out the language sound of 'please close the door' which not stops working until the door of the refrigerator is closed.

Description

Device for prompting closing door of refrigerator

The utility model is a kind of tollgate warning-apparatus for fridge, and it belongs to the field of configuration of refrigerator safety means, and it comprises the switch and the electric loop thereof of refrigerator intraoral illumination lamp.

Along with the refrigerator of various refrigeration forms is universal day by day, the refrigerator energy-saving problem also more and more causes people's attention, and wherein reducing the time of at every turn opening the door is an important aspect.Measure according to relevant department, when environment temperature was 30 ℃, chamber door was opened the time in 10 seconds, and the temperature inside the box changes little; When the time of opening surpasses 20 seconds, can make the temperature inside the box rise more than 10 ℃, this will need or compressor accumulative total is moved 15 minutes, or the semiconductor cooler multiplex (MUX) does a period of time, or absorption refrigerator consumes some fuel more and makes and roll back original temperature under the temperature inside the box, thereby makes the wasteful big increase of energy.In order to remind the user can shut and prevent that the user from forgetting closes the door or situation that Men Wei shuts takes place after the refrigerator doors as early as possible opening when using refrigerator, the domestic refrigerator producer that has on refrigerator trial assembly a kind of warning device, this device uses photodiode as detecting head, charging is delayed time to capacitor, can send sound signal by piezoelectric ceramic piece after chamber door is opened a period of time and remind the user to close the door.The weak point of this device is to use photodiode to come detection case intraoral illumination light to determine the open and close state of chamber door as probe, and this will cause one to be that inconvenience is installed, and the 2nd, this device is failure to actuate when illuminating lamp has been broken, and is also promptly inoperative; Simultaneously, because the discreteness of the capacitance of capacitor, trigger oscillating circuit and cause that easily the stability of circuit and reliability are relatively poor, the single defective such as non-adjustable of delay time and make that adopting charges with delaying time to capacitor; Moreover the sound dullness that the employing piezoelectric ceramic piece sends, uninteresting makes us dull.In addition, no matter whether this device refrigerator doors opens or closes all in running order always, i.e. power consumption, shortened service life of device again.

The purpose of this utility model is to avoid above-mentioned weak point of the prior art and a kind of reliable operation, easy for installation, the clear melodious tollgate warning-apparatus for fridge of sound is provided.

The purpose of this utility model can reach by following measure: directly be connected in the interior illuminating lamp two ends of refrigerator in parallel with two leads, utilize the switch of this lamp and electric loop thereof to get chamber door and open status signal and obtain the 220V civil power, converting the 220V civil power to stable low-voltage DC through the power supply device is the time-delay trigger that constitutes of main components and parts and the speech sound devices that can send people's speech to offer by linear integrated circuit piece NE555.Like this, open in refrigerator doors, illuminating lamp bright in, the 220V civil power starts delayer work via the power supply device, after the time of opening the door surpasses 15 seconds, delayer triggers speech sound device and sends the speech of " please close the door " continuously, closes until chamber door, quits work automatically just now.

The purpose of this utility model can also reach by following measure: for reliable operation and safe in utilization for the purpose of, adopt transformer that civil power 220V is reduced to low pressure, use bridge full-wave rectifier to add filter capacitor and circuit of three-terminal voltage-stabilizing integrated piece formation precision wave filtering mu balanced circuit, to satisfy the requirement of delayer, speech sound device to voltage-regulation coefficient.Adjustable for reaching timing accuracy height and timing, and have certain power output and used linear integrated circuit piece NE555 and resistance, capacitor to form delayer.Speech sound device adopts based on a language integrated circuit block, adds crystal power discharging transistor and loudspeaker, with the voice that acquisition gives great volume, tonequality is good.The model that the language integrated circuit block is selected for use is that YD-399 or HFC5200 all can, the speech signal of " please close the door " is become digital information in this kind integrated circuit block and stored, as long as receive the language analog signal output that trigger impulse just can become the D/A converting circuit of digital information through including that prestores the people again.Be reduced volume and easy for installation, above-mentioned power supply, time-delay, speech sound device can be contained on the wiring board and place box, be loaded in the refrigerator or all can outward and nearby; If be loaded in the case, then be preferably in circuit surface and be coated with materials such as carrying out silicon rubber and carry out protection against the tide processing.

The utility model has following advantage compared to existing technology:

1, reliable operation as long as refrigerator doors one is opened, is just started working automatically, promptly sends the prompting voice of continuous " please close the door " after 15 seconds.Even having broken, case intraoral illumination lamp do not influence its operate as normal yet.Adopt integrated circuit block to make stable performance, the time-delay timing accuracy is high and adjustable.

2, simple installation only needs two leads are connected to refrigerator intraoral illumination lamp two ends, and prompting device itself places in the case or near outer the reaching all can.

3, acoustic fidelity, clear and soft melodious is given a kind of cordial feeling, has increased enjoyment to life.

4, do not open the door and do not work not power consumption at ordinary times, prompting device long service life.

Describe concrete structure of the present utility model and working condition in detail below in conjunction with accompanying drawing.

Fig. 1 is a kind of basic structure assembling schematic diagram of the present utility model.

Fig. 2 is that the utility model is installed in a kind of basic schematic diagram in the refrigerator.

Fig. 3 is an electrical schematic diagram of the present utility model.

With reference to Fig. 1 and Fig. 2, have shell 3 that power line wire hole 2 and loudspeaker go out sound grid 5 is fixed on refrigerator lighting lampshade 9 through screw 7 bottom, loudspeaker Y and wiring board 4 are housed in the shell 3, electronic devices and components 6 are installed on the plate 4 are embedded with transformer B with slotting, transformer B is connected with the power line that passes through power line wire hole 21 that is connected in the refrigerator lighting lamp two ends in parallel.

With reference to Fig. 3, the two ends of the high side joint refrigerator intraoral illumination lamp of transformer B, low side joint is by D₁～D ₄The input of the bridge full wave rectifier that consists of, C₁～C ₄Be parallel to the output of this bridge rectifier, select three end integrated regulator pieces 7806 to be serially connected with between bridge rectifier and the load as voltage-stablizer and formed power device. Delayer is by C₅、R ₁Be connected to (delay time t and C between the positive and negative electrode of power device after the series connection₅、R ₁Value relevant, relational expression is t=11R₁C ₅), the triggering input of linear integrated circuit piece NE555 2. pin, threshold value input 6. pin meet C₅、R ₁Contact on, reset terminal 4. pin, power positive end 8. pin connect the positive pole of power device, control end 5. pin with work the C that prevents interference effect₆After the series connection and the common ground end 1. pin connect together the negative pole of power device, 3. pin is consisted of by output. Language integrated circuit block X can select commercially available, and model is YD-399 or HFC5200. When selecting YD-399, its 1. pin, trigger end 2. pin all with the output of NE555 3. pin, adjust the resistance R of tone₂An end, the end of loudspeaker Y be connected the 3. pin of X and the C that plays the effect of adjustment tone₇The series connection after and 4. pin meet together R₂The other end, output 5. pin connects the base stage of crystal power discharging transistor V, the colelctor electrode of V connects the other end of loudspeaker Y, the negative pole that the 6. pin of emitter stage and X connects power device has together formed speech sound device.

After refrigerator doors is opened, gate luminous lamp switch K closure, the 220V alternating current is reduced to 12V by transformer B, and process is by D₁～D ₄Become direct current behind the bridge rectifier that forms, again via C₁～C ₄Be 0.5%～0.1% 6V direct current with becoming a voltage-regulation coefficient behind the fixed three end integrated regulator pieces 7806. At the moment that the 6V direct current is connected, time capacitor C₅On voltage be zero, voltage all is added in resistance R₁On, this moment, the 3. pin of NE555 was exported electronegative potential; Along with to C₅Charging, 2. the pin current potential descends, and waits C₅On voltage when reaching the threshold voltage of NE555, the upset of NE555 circuit block internal trigger, 3. pin output high potential U₀, and keep inputing to as power supply the speech sound device of back always, be used as trigger impulse and driving power. In a single day the 2. pin of language integrated circuit block YD-399 in speech sound device receives trigger impulse U₀The time, just the digital information with internal memory becomes people's language analog signal again by 5. pin output through the digital-to-analogue conversion circuit that includes; Carry out sending continuously the prompting language by loudspeaker Y again after audio frequency amplifies through power discharging transistor 8050---please close the door. As long as refrigerator doors is not fastened or is fastened rear cabinet intraoral illumination lamp and do not go out yet, then continue to send alerting signal, just automatically quit work until chamber door is fastened or illuminating lamp goes out.

An exemplary embodiments of the present utility model is to select D for use ₁～D ₄=IN4001 * 4(Japan produces model), C ₁=1000 μ, C ₂=0.33 μ, C ₃=0.1 μ, C ₄=220 μ, C ₅=22 μ, C ₆=0.01 μ, C ₇=470P, R ₁=1M Ω, R ₂=470K, V=8050(Japan produces model), Y=8 Ω/0.2W.In this case, the utility model promptly sent clear, the melodious voice of continuous " please close the door " in 15 seconds automatically after refrigerator doors is opened.

Claims (6)

1, a kind of tollgate warning-apparatus for fridge, it comprises the switch and the electric loop thereof of case intraoral illumination lamp, and feature of the present utility model is, and it also comprises and being loaded on the wiring board:

A, power supply device (B, D ₁～D ₄, C ₁～C ₄, Z), the 220V civil power that is used for introducing from case intraoral illumination lamp two ends convert stable low-voltage DC to,

B, delayer (NE555, R ₁, C ₅, C ₆), link to each other with the power supply device, be used for trigger when the power supply device provides low-voltage DC, send a triggering signal after a period of time,

C, speech sound device (X, R ₂, C ₇, V, Y), it links to each other with delayer with the power supply device respectively, when triggering signal is then sent voice.

2, prompting device according to claim 1 is characterized in that the power supply device is by D by the two ends of the high side joint case intraoral illumination lamp of transformer B, low side joint ₁～D ₄The input of the bridge rectifier that constitutes, C ₁～C ₄Be parallel to the output of this bridge rectifier, voltage-stablizer Z is serially connected with between bridge rectifier output and load and forms.

3, prompting device according to claim 1 and 2 is characterized in that voltage-stablizer Z is a circuit of three-terminal voltage-stabilizing integrated piece 7806.

4, prompting device according to claim 1 is characterized in that delayer is by C ₅, R ₁Be connected to after the series connection between the positive and negative electrode of power supply device, integrated circuit block NE555 2., 6. pin meets C ₅, R ₁Contact on, 4., 8. pin connects positive pole, 5. pin and C ₆Series connection back and 1. pin connect negative pole together, 3. pin is formed by output.

5, prompting device according to claim 1, it is characterized in that speech sound device be by language integrated circuit block X 1., 2. pin all with 3. pin, the R of NE555 ₂An end, the end of loudspeaker Y be connected 3. pin and the C of X ₇Series connection back and 4. pin meet R together ₂The other end, 5. pin connects the base stage of crystal power discharging transistor V, the 6. pin that the colelctor electrode of V meets the other end, emitter stage and the X of loudspeaker Y connects the negative pole of power supply device together and forms.

6, prompting device according to claim 1 or 5, the model that it is characterized in that language integrated circuit block X is YD-399 or HFC5200.

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