CN2355264Y

CN2355264Y - Computer temperature controller for gas water heater

Info

Publication number: CN2355264Y
Application number: CN 97237895
Authority: CN
Inventors: 周德福
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-10-22
Filing date: 1997-10-22
Publication date: 1999-12-22
Anticipated expiration: 2007-10-22

Abstract

The utility model relates to a computer temperature controller for a gas water heater, which comprises a gas valve, a water valve, a gas-water stepping motor, power supply, an SCM, a temperature sensor, a wire remote control device and a gas-water motor drive circuit. The output of the temperature sensor and the wire remote control device is sent to the SCM whose output is sent to the wire remote control device and the gas-water motor drive circuit, and the output of the gas-water motor drive circuit is sent to the gas-water stepping motor. The utility model has the advantages of favorable performance of constant temperature, quick response of automatic constant temperature and low cost.

Description

The microcomputerized control thermostat that is used for gas heater

The utility model relates to gas heater, particularly computer wired remote control water heater.

Chinese patent CN2189290Y discloses a kind of temperature automatically controlled control water gas heater, it installs motor additional on the air valve of water heater, water valve, dispose large and small worm gear, worm screw, friction pulley makes it to become electric-air valve and dynamoelectric water valve, by the electronic control type thin film switch, control electric-air valve and dynamoelectric water valve are realized temperature automatically controlled control water.Its shortcoming is, can not accurately control the hot water temperature, also do not have the concrete demonstration of hot water temperature's number of degrees.

The purpose of this utility model is to overcome above-mentioned weak point and carries a kind of microcomputerized control thermostat that is used for gas heater, temperature adjustment and control water temperature that it can be set according to the bather, and the demonstration of the water temperature number of degrees is arranged.

The purpose of this utility model reaches by following measure: a kind of microcomputerized control thermostat that is used for gas heater, comprise air valve, pneumoelectric machine, water valve, hydroelectric machine, power circuit, it is characterized in that the wire remote control devices, pneumoelectric drive circuit, the hydroelectric machine drive circuit that also have single-chip microcomputer, temperature sensor, form by scanning display circuit and increase and decrease water temperature function key; Single-chip microcomputer is all delivered in the output of increase and decrease water temperature function key in the output of temperature sensor and the wire remote control devices, scanning display circuit, pneumoelectric drive circuit and the hydroelectric machine drive circuit in the wire remote control devices delivered in the output of single-chip microcomputer respectively, and pneumoelectric machine 12 and hydroelectric machine 11 are delivered in the output of pneumoelectric drive circuit and hydroelectric machine drive circuit respectively; Described pneumoelectric machine 12 and hydroelectric machine 11 are stepper motor.

Adopt technique scheme, single-chip microcomputer compares with the temperature of setting by increase and decrease water temperature function key the temperature of temperature sensor timing sampling, and according to its difference water valve, air valve are adjusted, to reach required set temperature value, the water temperature number of degrees are shown by the scanning display circuit at any time.This just makes the bather know the actual temp of hot water, and can set and regulate temperature easily by wire remote control devices.

Fig. 1 is a functional-block diagram of the present utility model;

Fig. 2 is the electrical schematic diagram of main board of the present utility model;

Fig. 3 is the electrical schematic diagram of wire remote control devices of the present utility model (being the remote control panel part);

Fig. 4 is front view of the present utility model (a split type mounting means);

Fig. 5 is the front view after thermostat box shown in Figure 4 is thrown off loam cake;

Fig. 6 is front schematic view of the present utility model (with the supporting mounting means of water heater).

The utility model is described in further detail below in conjunction with accompanying drawing:

Fig. 1 illustrates, and with reference to Fig. 2, Fig. 3, the utility model is made up of single-chip microcomputer 15, temperature sensor 7, wire remote control devices 4, display 2, pneumoelectric drive circuit 14, hydroelectric machine drive circuit 13, pneumoelectric machine 12, hydroelectric machine 11, power circuit 18 etc.Among Fig. 1 (contrast Fig. 2), J ₂Be temperature sensor socket, J ₃Be wire remote control devices socket, J ₄Be the display socket; The circuit structure of display 2 and wire remote control devices 4 are just the same, all as shown in Figure 3 (thereby display 2 is not provided again be the electrical schematic diagram of display board part).

Among Fig. 2,220 volts of alternating currents become 12 volts of direct currents (not drawing in this partial graph 2) through transformer (as the XM208 type of Chaoyang, Guangdong star horse Industrial Co., Ltd. production), deliver to supply socket J ₈J ₈The 12VDC of place is through microswitch socket J ₇(under the closed situation of microswitch) exports the 5V DC voltage of high stability to single-chip microcomputer U by 3 pin of integrated circuit P1 (MC7805T) ₁The Vcc pin, make single-chip microcomputer U ₁The control section circuit is logical; J ₈The 12VDC of place is directly through integrated circuit P ₂(MC7805T) 3 pin output 5V DC voltage is again through diode D ₂, resistance 6 delivers to single-chip microcomputer U ₁The Vcc pin, like this, under the situation that microswitch disconnects (when the instant heating hydrophone is cut off the water), single-chip microcomputer U ₁Control section outage, but its memory section passes through J ₈, P ₂Still charged work.In addition, J ₈The 12VDC of place is through J ₇Deliver to pneumoelectric machine transplanting of rice seat J ₅With hydroelectric machine socket J ₆, pneumoelectric machine and hydroelectric machine adopt stepper motor (model 35BYJ46) to power with 12VDC.

Single-chip microcomputer 15 adopts AT89C2051 type 8-bit microcontrollers, after first programmed, program are logical fully, again with its curing (writing) in its ROM.Among Fig. 2, single-chip microcomputer U ₁13 pin and temperature sensor socket J ₂1 pin join J ₂The 1 pin potentiometer R that connects successively ₁₀, resistance R ₉Back and U ₁The Vcc pin join potentiometer R ₁₀As adjusting display error (actual water temperature is poor with the demonstration water temperature) usefulness before the product export, this is the resistance value reason that there is some difference owing to the temperature sensor of same model.U ₁16,17,18,19,7 pin respectively with integrated

circuit U

₃13,1,2,3,14 pin (74HC259) join

U

₃4,5,6,7 pin respectively with integrated circuit U ₄(7407)

input

1,3,5,9 pin join U ₄Output 2,4,6,8 pin respectively with pneumoelectric machine transplanting of

rice seat J

₅2,3,4,5 pin join

U

₃9,10,11,12 pin respectively with integrated circuit U ₅(7407)

input

1,3,5,9 pin join U ₅Output 2,4,6,8 pin respectively with hydroelectric

machine socket J

₆2,3,4,5 pin join above-mentioned U ₃, U ₄, J ₅Form pneumoelectric drive circuit 14, U ₃, U ₅, J ₆Form hydroelectric machine drive circuit 13.Crystal oscillator X ₁(12MHz), capacitor C ₂, C ₃The crystal oscillating circuit and the U that constitute ₁4,5 pin join, supply with U ₁The oscillation source of the operate as normal of relying.Single-chip microcomputer U ₁Vcc, 19,18,17,16,15,14,8,9,2 pin respectively with wire remote control devices socket J ₃With

display socket J

₄1,2,3,4,5,6,7,8,9,10 pin join U ₁2 pin pass through resistance R ₄Join U with the Vcc pin ₁11 pin pass through resistance R ₇Join with the Vcc pin, and pass through resistance R ₈Join with 12 pin, 12 pin connect capacitor C ₄Back ground connection.

Fig. 3 illustrates, integrated circuit U ₂(74HC259) and 2 bit digital display L (ELD-406HWB) form scanning display circuit in the wire remote control devices 4.

U

₂13,1,2,3,14,15 pin respectively with

socket J

₁5,2,3,4,10,1 pin join

U

₂4,5,6,7,9,10,11,12 pin join with A, B, C, D, E, F, G, the DF pin of L respectively;

J

₁7,6 pin join with CS1, the CS2 pin of L respectively; The intensification key S that forms increase and decrease water temperature function key 3 ₁With cooling key S ₂All be an end ground connection, the other end respectively with

J

₁8,9 pin connect after, pass through resistance R more respectively ₁, R ₂With J ₁1 pin (J ₁Pin and single-chip microcomputer U ₁The Vcc pin join) join.

Fig. 4, Fig. 5 illustrate the mode of the utility model and existing water heater partial installation, use for the family that buys water heater.Thermostat box 1 is provided with power line 16, display 2, and the increase and decrease water temperature function key 3 on display 2 panels is (by intensification key S ₁With cooling key S ₂Form).(Fig. 5) is provided with transformer 6 (input: 220V in the thermostat box 1, output 12VDC), mainboard 10 (containing the microcomputer control circuit that electric elements shown in Figure 2 constitute), water valve 8, air valve 9, hydroelectric machine 11, pneumoelectric machine 12 is installed in microswitch 5 (SS-6GL-F) and temperature sensor 7 (model TSD11) on the water pipe.Another termination shower room pipe of water pipe (water valve 8 a place pipelines) termination water heater outlet; Tracheae (air valve 9 a place pipelines) termination inlet manifold, another termination water heater air inlet pipe.Thermostat box 1 can be installed on the outer wall of shower room and thermostat box 1 is placed in the shower room and used for temperature adjustment by wired remote controller 4 (considering waterproof requirement during making) of wired connection.Supporting mounting means shown in Fig. 6, the supporting use of hot water supply device complete system plant.Display 2 is contained on the panel of gas heater 17, and water valve 8 and air valve 9 are installed in the gas heater 17, and air valve 9 is installed in the air inlet pipeline, and water valve 8 is installed in hot water effluent's pipeline, among the hot water outlet pipe that temperature sensor 7 is arranged on.Microswitch 5 can be arranged on the hot water line, also can be arranged in the cold water inlet road, also can be by the connecting rod action of the aqueous vapor interstage valve of gas heater 17.

The utility model course of work following (conjunction with figs.):

The plug that plugs in, the 220V alternating current is delivered to power socket J through transformer 6 with 12VDC ₈After the water heater water flowing, microswitch 5 closures, J ₇Logical, U ₁The control section circuit logical, start working.After if water heater is cut off the water, microswitch 5 disconnects U ₁Control section outage, but memory function is partly passed through J ₈, P ₂Still charged work.In 3 seconds after the start, display 2 and wire remote control devices 4 show the setting thermostat temperature the when last time is used water heater simultaneously.Increase, subtract this design temperature as need, can operate S ₁, S ₂, whenever pull out and once increase or subtract 1 ℃.Display water heater water outlet water temperature after 3 seconds.After water heater was opened, 7 pairs of hot water water temperatures of temperature sensor timing sampling was sent into single-chip microcomputer U ₁, U ₁Thermostat temperature to this sample temperature and setting compares, and draws the difference of actual water temperature and thermostat temperature, through U ₁In after the program that presets judges, its output signal is delivered to hydroelectric machine 11 or pneumoelectric machine 12 through hydroelectric machine drive circuit 13 gentle motor-drive circuits 14 (genus pulsqe distributor), and water valve 8 or air valve 9 are adjusted.

The utility model compared with prior art has the following advantages:

1, temperature persistance is good. According to the prototyping testing result, water temperature control accuracy ± 1 ℃, water temperature display error-0.5 ℃.

2, the automatic constant-temperature response is fast. According to the prototyping testing result, about the 30 seconds adjustment time of start, 26 seconds stabilization time of hot water temperature.

3, simple in structure, cheap.

Claims

1, a kind of microcomputerized control thermostat that is used for gas heater, comprise air valve, pneumoelectric machine, water valve, hydroelectric machine, power circuit, it is characterized in that the wire remote control devices 4, pneumoelectric drive circuit 14, the hydroelectric machine drive circuit 13 that also have single-chip microcomputer 15, temperature sensor 7, form by scanning display circuit and increase and decrease water temperature function key 3; Single-chip microcomputer 15 is all delivered in the output of increase and decrease water temperature function key 3 in the output of temperature sensor 7 and the wire remote control devices 4, scanning display circuit, pneumoelectric drive circuit 14 and the hydroelectric machine drive circuit 13 in the wire remote control devices 4 delivered in the output of single-chip microcomputer 15 respectively, and pneumoelectric machine 12 and hydroelectric machine 11 are delivered in the output of pneumoelectric drive circuit 14 and hydroelectric machine drive circuit 13 respectively; Described pneumoelectric machine 12 and hydroelectric machine 11 are stepper motor.

2, thermostat according to claim 1 is characterized in that, the scanning display circuit in the display 2 that is installed on the constant temperature box 1 is also delivered in the output of described single-chip microcomputer 15, and single chip circuit 15 is delivered in the output of the increase and decrease water temperature function key 3 in the display 2; Display 2 has identical circuit structure with wire remote control devices 4.

3, thermostat according to claim 2 is characterized in that, single-chip microcomputer U ₁13 pin and temperature sensor socket J ₂1 pin join J ₂The 1 pin potentiometer R that connects successively ₁₀, resistance R ₉Back and U ₁The Vcc pin join; U ₁16,17,18,19,7 pin respectively with integrated circuit U ₃13,1,2,3,14 pin join U ₃4,5,6,7 pin respectively with integrated circuit U ₄Input 1,3,5,9 pin join U ₄Output 2,4,6,8 pin respectively with pneumoelectric machine transplanting of rice seat J ₅2,3,4,5 pin join U ₃9,10,11,12 pin respectively with integrated circuit U ₅Input 1,3,5,9 pin join U ₅Output 2,4,6,8 pin respectively with hydroelectric machine socket J ₆2,3,4,5 pin join; Single-chip microcomputer U ₁Vcc, 19,18,17,16,15,14,8,9,2 pin respectively with wire remote control devices socket J ₃With display socket J ₄1,2,3,4,5,6,7,8,9,10 pin join U ₁2 pin pass through resistance R ₄Join with the Vcc pin; U ₁11 pin pass through resistance R ₇Join with the Vcc pin, and pass through resistance R ₈Join with 12 pin, 12 pin connect capacitor C ₄Back ground connection; Scanning display circuit in display 2 and the wire remote control devices 4 is constructed as follows: integrated circuit U ₂13,1,2,3,14,15 pin respectively with socket J ₁5,2,3,4,10,1 pin join U ₂4,5,6,7,9,10,11,12 pin join with A, B, C, D, E, F, G, the DF pin of 2 bit digital display L respectively; J ₁7,6 pin respectively with the CS of L ₁, CS ₂Pin joins; The intensification key S1 and the cooling key S2 that form increase and decrease water temperature function key 3 all are an end ground connection, the other end respectively with J ₁8,9 pin join after, pass through resistance R more respectively ₁, R ₂With J ₁1 pin join.