CN2114291U

CN2114291U - Solid thermostal for fish feeding receptacle

Info

Publication number: CN2114291U
Application number: CN 92204166
Authority: CN
Inventors: 刘树臣
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-03-14
Filing date: 1992-03-14
Publication date: 1992-09-02

Abstract

The utility model belongs to the technique of the temperature-controlling switch. The solution is presented in order to solve problems of the winter-passing for the fancy fishes, and especially tropical fishes. The solid thermostal for fish feeding receptacle is composed of an engine case, a circumscribing heater temperature sensor, a temperature-adjustable temperature turn knob and a display lamp. The thermostatic controlling circuit is composed of a power part, a power switch part, and a heating operation part. The power supply is adopted resistor pressure relief one-half period rectification added voltage stabilizer, the power switch is adopted integrated circuit, and the heating part is adopted contactless switch composed of solid-state relay thyristor. The solution has features of simple structure, reliable operation, low cost and long life time.

Description

Solid thermostal for fish feeding receptacle

The utility model belongs to thermostatic control Switch technology, and it relates to the structure that the temperature controller that fish jar uses is repaid in a kind of sight.

Along with improving constantly of people's material life, the demand for development in cultural life improves rapidly, and many people have the sight of supporting to repay the hobby of fish, and it is colorful more colourful that it can decorate family life.But the low fish of the water temperature of the fish jar difficulty of passing the winter is especially repaid costly tropical fish to sight under the simple and easy heating condition of general northern family, and this just requires the heater of a water temperature.Know to have only the simple heating device in the market through investigation, need the people to operate control during use, have the job stability of tape controller bad, often be out of order, do not have even have the product of simple and reliable electronic thermostatic control heater.

The purpose of this utility model provides a kind of heater that has the electronic temperature control device, and its temperature controller can be adjusted in specified scope, can make fish jar constant temperature.

By as above design, the solid-state fish tank thermostat that this programme provided includes temperature adjustment button and the display lamp on the plastic casing of thermostat, the external heater of putting into fish jar and temperature detector, the panel, its concrete feature is that its constant temperature control circuit is made up of the operating part of power unit, power switch part and heating, wherein its power unit by K switch, dropping resistor R, commutation diode D1, voltage-stabiliser tube D2, reach filter capacitor C and constituted; Its power switch part is by power switch piece IC1 and provide the bleeder circuit of each pin current potential to be constituted, and its bleeder circuit is that temperature detector resistance R t and W1W2 constitute by dropping resistor R2, thermistor, and W1 is a temperature adjustment button controlling resistance on the panel; Bidirectional triode thyristor BCR that the operating part of its heating is triggered by solid-state relay IC2 and load heating resistor R5 thereof, display lamp ZD1, ZD2 are constituted, be in series the secondary of solid-state relay and heating resistor R5, dropping resistor R4 and the The Trigger of Bidirectional Triode Thyristor utmost point of the elementary and dropping resistor R3 of solid-state relay IC2 and the output of IC1 is in series, bidirectional triode thyristor and heating resistor R5 are connected among the external circuit, burner on light ZD1 is in parallel with heating resistor R5, and constant temperature keeps indicator lamp ZD2 in parallel with the silicon controlled two ends.

R5 picks out that to be placed in the water be heating element heater in the side circuit, and Rt picks out and is placed in the water is temperature-sensing element, connects power supply K during work, sends the 15V DC voltage through step-down rectifier, voltage stabilizing, filtering.The resistance of Rt improves with temperature and reduces, when water temperature ratio in the fish jar require to control temperature when low the Rt resistance strengthen, make the 2 pin current potentials of power switch piece IC1 low, switch block conducting when current potential is lower than 1.5V, also conducting of solid-state relay IC2, the controllable silicon BCR conducting that also is triggered, heating resistor R5 work improves water temperature, and burner on light ZD1 is bright.Rt diminishes because of temperature improves when water temperature rises, 2 pin current potentials rise, switch block ends when being higher than 1.5V, solid-state relay and controllable silicon also end, stop heating and be keeping warm mode, it is bright that be incubated indicator lamp ZD2 this moment, and it is constant that periodic duty like this can make water temperature remain in certain scope, and the W1 that adjusts in the divider can change the scope that keeps temperature.

Requirement to voltage and waveform in this programme is not strict, so replaced transformer with dropping resistor, has only selected halfwave rectifier for use on rectifier.For improving the life-span and making working stability, adopted noncontacting switch at the operating part that heats.Power switch has adopted integrated circuit, and it has saved the space, and energy assurance work is accurately with stable.

Adopt this programme can embody following superiority: 1. can realize its Applicable temperature scope of stepless within the specific limits adjustment, guarantee the constant temperature in the fish jar; 2. adopt integrated circuit and noncontacting switch, make complete machine work accurate, reliable and stable; 3. circuit structure is simple, is easy to make and promote.

Fig. 1 is the profile schematic diagram of the solid-state fish tank thermostat of this programme.

Fig. 2 is thermostatically controlled electrical schematic diagram.

The resistance (1) of heating among the figure is that the R5 in the circuit is placed in the fish jar, and temperature detector (2) is to be placed in the fish jar after Rt picks out.Power switch (3) is the K in the circuit, and (4) among the figure, (5) are the combination hub of external heater and temperature detector, and (6) are burner on light ZD1, and (7) keep indicator lamp ZD2 for constant temperature, and (8) are W1 for the controllable temperature knob.

In the present embodiment, dropping resistor R1 is 3W8K, and D1 adopts 1N4007, D2 selects the voltage-stabiliser tube of 15V left and right sides disposable type for use, and Rt adopts TWH8751 with 8～10K negative tempperature coefficient thermistor, power switch piece, solid-state relay SP1110, heating resistor is with 20～100W electric heater.Casing adopts the ABS engineering plastics, and panel adopts aluminium sheet to print.This programme pilot sample is through probationary certificate, and working stability is reliable, and temperature is stepless adjustable easy to use in indicating range.

Claims

1, a kind of solid-state fish tank thermostat, it includes the thermostat shell of plastics and the temperature adjustment button on the external heater of putting into fish jar water, temperature detector and the housing face-plate, display lamp, the constant temperature control circuit that it is characterized in that it be power unit, power switch part, and the operating part of heating form, its power unit is made of K switch, dropping resistor R1 and rectifying tube D1 voltage-stabiliser tube D2 and filter capacitor C; Its power switch is by power switch piece IC1 and provide the bleeder circuit of 1,2 pin current potentials to be constituted, and its bleeder circuit is that temperature detector resistance R t and W1, W2 constitute by dropping resistor R2, thermistor, and W1 is the temperature adjustment button controlling resistance on the panel; Bidirectional triode thyristor BCR and load heating resistor R5 thereof that the operating part of its heating is triggered by solid-state relay IC2, display lamp ZD1, ZD2 constitutes, elementary and the dropping resistor R3 of solid-state relay IC2 and the output of power switch piece are in series, secondary and the heating resistor R5 of solid-state relay IC2, the trigger end series connection of dropping resistor R4 and bidirectional triode thyristor BCR, heating resistor R5 and silicon controlled two ends are connected on the two ends of input power supply, display lamp comprises the indicator lamp ZD2 that other thermal light ZD1 and constant temperature keep, burner on light ZD1 is in parallel with heating resistor R5, and the indicator lamp ZD2 that constant temperature keeps is in parallel with the silicon controlled two ends.