CN2147483Y

CN2147483Y - Electricity-saving protector for refrigerator

Info

Publication number: CN2147483Y
Application number: CN 92237135
Authority: CN
Inventors: 高田山
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-11-26
Filing date: 1992-11-26
Publication date: 1993-11-24
Anticipated expiration: 2002-11-26

Abstract

The utility model relates to an electricity-saving protector for a refrigerator, which comprises a casing and a circuit board arranged in the casing, wherein, the circuit board is provided with two timing circuits H1 and H2, a power supply is connected with the timing circuits through a transformer, a diode rectifying bridge and a capacitor; the power supply is connected with the refrigerator through a normally closed contact of a relay in the timing circuit H1 and a normally open contact of a relay in the timing circuit H2. A front panel of the casing is provided with a stop adjusting knob 2 and a start adjusting knob 3, and the stop time and the start time can be continuously adjusted between 2 to 60 minutes; thus, the adjustable range of the upper temperature limit of a freezing chamber is enlarged, the refrigerator can save electricity 20 to 50%, and the power-off protection in a short time can be realized without increasing elements.

Description

Electricity-saving protector for refrigerator

Refrigerator economize on electricity protective device relates to the electromagnetic relay field, particularly relates to and can be used for controlling refrigerator power failure power-on time, and the economize on electricity protector of short time power-off protection function is arranged.

At present, it is less that the cryogenic temperature upper limit of household electric refrigerator refrigerating chamber is reconciled amplitude, when the user need not to use the low temperature frozen food, can not reconcile the low temperature higher limit on demand, cause the refrigerator refrigerating capacity to surpass actual requirement and waste electricity consumption, compressor operating time length also reduces its service life, and the generation of short time outage also can cause compressor impaired in addition.Existing refrigerator electricity-saving appliance is taked to control the compressor shutdown time and is economized on electricity; because to not control and non-adjustable of available machine time; can not shorten refrigerator internal temperature constant interval, power savings is poor, and its short time power-off protection function is finished by increasing the delay circuit element.

The purpose of this utility model provides a kind of refrigerator economize on electricity protector; under the prerequisite that guarantees refrigerating effect, start of control compressor and downtime, reach purpose of saving; under the condition that does not increase any element, realize defencive function simultaneously to the outage of refrigerator short time.

The electricity principle of refrigerator economize on electricity protector be control available machine time T1 and downtime T2; thereby also just controlled the value of ρ=T1/T2; under the prerequisite that guarantees freezing effect; the ρ value is more little; the mean power that refrigerator consumed is just more little; ρ is a constant under the identical situation of average power consumption; refrigerating effect depend on available machine time T1 and downtime T2 length; get a definite ρ value for same refrigerator; the temperature t 1 of the refrigerating efficiency η of refrigerator and refrigerating chamber in addition; environment temperature t2 is relevant; be η=t2-t1; its value is big more, and refrigerating efficiency is low more, otherwise its value is more little; refrigerating efficiency is high more; therefore in control ρ value size, also will to start time T 1 and downtime T2 length make suitable selection, make the refrigerator internal temperature under the prerequisite of assurance refrigerating effect; the amplitude of fluctuation is as much as possible little, so that obtain better power savings.

The purpose of this utility model is achieved in that refrigerator economize on electricity protector includes housing 1, be provided with circuit board in the housing 1, its special character is also to be provided with on housing 1 front panel adjusts knob 2 downtime, be the variable resistor R4 among the timing circuit H2, reconcile knob 3 with the available machine time, be the variable resistor R2 among the timing circuit H1, described circuit board is provided with two identical timing circuit H1 and H2, the normally opened contact J23 of the relay J 2 among the normally-closed contact J12 of the relay J 1 of power supply in timing circuit H1 and the timing circuit H2 is connected with refrigerator, the normally-closed contact J12 of J1, the normally opened contact J23 of J2, refrigerator the three be in series, power supply is through transformer B, diode rectifier bridge and capacitor C 1 link to each other with H2 with timing circuit H1, are its power supply; H1 links to each other with normally-closed contact J21 in the H2 circuit through capacitor C 2, and H2 links to each other with normally opened contact J11 in the H1 circuit through capacitor C 3.

The utility model has the advantages that: the downtime of refrigerator and available machine time are all adjustable continuously in 2-60 minute; make adjustable interval expansion of the refrigerating chamber cryogenic temperature upper limit, under the prerequisite that guarantees the refrigerator refrigeration temperature, with the highest refrigerating efficiency state work; thereby reach 20～50% power savings; under the prerequisite that does not increase any element, realize the defencive function of short time outage simultaneously, this utility model circuit is simple; need not debug; cost is low, and good reliability is easy to produce.

Be described in detail technical solution of the present utility model below in conjunction with accompanying drawing.

Fig. 1 is an external form schematic diagram of the present utility model.

Fig. 2 is a logic block-diagram of the present utility model.

Fig. 3 is circuit theory diagrams of the present utility model.

Refrigerator economize on electricity protector includes housing 1, be provided with circuit board in the housing 1, its special character is also to be provided with on housing 1 front panel adjusts knob 2 downtime, be the variable resistor R4 among the timing circuit H2, reconcile knob 3 with the available machine time, be the variable resistor R2 among the timing circuit H1, described circuit board is provided with two identical timing circuit H1 and H2, the normally opened contact J23 of the relay J 2 among the normally-closed contact J12 of the relay J 1 of power supply in timing circuit H1 and the timing circuit H2 is connected with refrigerator, the normally-closed contact J12 of J1, the normally opened contact J23 of J2, refrigerator the three be in series, power supply is through transformer B, diode rectifier bridge and capacitor C 1 link to each other with H2 with timing circuit H1, are its power supply; H1 links to each other with normally-closed contact J21 in the H2 circuit through capacitor C 2, and H2 links to each other with normally opened contact J11 in the H1 circuit through capacitor C 3.

Among two identical timing circuit H1, H2 on circuit board; regularly pickup time, length was T2 downtime to relay J 1 among the timing circuit H1; timing length pickup time of the relay J 2 among the timing circuit H2 is available machine time T1, and the process of two mutual controls of timing circuit H1, H2 is:

J2 among the H2 opens → and J1 among the H1 closes

J1 among the H1 opens ← and J2 among the H2 closes

Cause the relay group formed by relay J 1, J2 thus, be among the circulation of following state

First state, second state

J1 opens and J2 opens → and J1 closes and J2 opens

J1 opens and J2 closes ← and J1 closes and J2 closes

The 4th state third state

Its time that continues of first, second state is a flash of short duration, belongs to transition state, and the duration of the third state is T2 downtime, and the duration of the 4th state is available machine time T1.

At two timing circuit H1, in the process that H2 controls mutually, J2 among the timing circuit H2 convinces the J1 that causes among the timing circuit H1 by patient analysis and closes, its implementation is: the power supply of economize on electricity protector charges to the capacitor C that plays time action among the timing circuit H1 2 by a normally-closed contact J21 of relay J 2, by the relay J among the timing circuit H1 1 close that the J2 that causes among the H2 closes implementation be: economize on electricity protector power supply is by capacitor C 3 chargings of a normally opened contact J11 to playing time action among the H2 of J1, when by J1, when the relay group that J2 forms is in the 4th state, power supply is powered to refrigerator through the normally opened contact J23 of J2 by the normally-closed contact J12 of J1 again, and J12 connects with J23.

When the electrical network short time cuts off the power supply; no matter the relay group is in any state; first state that all returns to is that J1 opens and J2 opens; when electrical network send electricity once more; the relay group must be through first state, and second state closes and J2 closes to third state J1, and three states just can enter the 4th state after shutting down time T 2 be that J1 opens and J2 closes; to the refrigerator power supply, therefore in fact refrigerator is powered and play the delay protection effect.

The utility model also can include a start button N in advance, adds one tunnel road circuit that is in parallel with capacitor C 2 in timing circuit H1, and this road is to be in series by start button N and resistance in advance to constitute.

Start button N gets final product if work, need only click in advance after needing refrigerator to insert power supply at once, and this moment, capacitor C 2 will be ended by the multiple tube that N, R2 discharge causes BG1, BG2 to form, and J1 discharges, and makes the power supply of J12 closed pair refrigerator.

Claims

1; a kind of refrigerator economize on electricity protector includes housing 1; be provided with circuit board in the housing 1; it is characterized in that also being provided with on housing 1 front panel and adjust knob 2 downtime; be the variable resistor R4 among the timing circuit H2; reconcile knob 3 with the available machine time; be the variable resistor R2 among the timing circuit H1; described circuit board is provided with two identical timing circuit H1 and H2; the normally opened contact J23 of the relay J 2 among the normally-closed contact J12 of the relay J 1 of power supply in timing circuit H1 and the timing circuit H2 is connected with refrigerator; the normally-closed contact J12 of J1; the normally opened contact J23 of J2; refrigerator the three be in series; power supply is through transformer B; diode rectifier bridge and capacitor C 1 link to each other with H2 with timing circuit H1; be its power supply; H1 links to each other with normally-closed contact J21 in the H2 circuit through capacitor C 2, and H2 often opening in capacitor C 3 and H1 circuit touched J11 and linked to each other.

2, economize on electricity protector according to claim 1 is characterized in that it also includes a start button N in advance, adds one tunnel road circuit that is in parallel with capacitor C 2 in timing circuit H1, and this road is to be in series by start button N and resistance in advance to constitute.