CN102323835A

CN102323835A - A kind of electronic temperature control device with the compressor start function

Info

Publication number: CN102323835A
Application number: CN201110113537A
Authority: CN
Inventors: 谭琦; 谭思怡
Original assignee: SHANGHAI STAR ELECTRONICS TECHNOLOGY Co Ltd
Current assignee: SHANGHAI STAR ELECTRONICS TECHNOLOGY Co Ltd
Priority date: 2011-05-03
Filing date: 2011-05-03
Publication date: 2012-01-18
Anticipated expiration: 2031-05-03
Also published as: CN102323835B

Abstract

A kind of electronic temperature control device with the compressor start function is made up of power circuit [1], single-chip microcomputer [7], compressor switch circuit [3], compressor start circuit [2], temperature-compensation circuit [4], adjustment and testing circuit [5] and LED lamp group [6].This temperature controller is formed a control system by single-chip microcomputer, and its power circuit adopts capacitance decompression, and positive and negative then half-wave is handled respectively, the control system power supply that positive half cycle wherein forms after the rectifying and wave-filtering voltage stabilizing, for single-chip microcomputer [7]; The LED lamp group [6] that negative half period uses for the refrigerating appliance interior lighting after the rectifying and wave-filtering voltage stabilizing provides power supply; Have two to be connected lead between compressor start circuit [2] and the compressor [Cp], one is connected with compressor start winding [S], and another is connected with the starting winding [S] of compressor and the common port [C] of main winding [M].This temperature controller uses very simple circuit on the electronic temperature control device, to realize the function of traditional compressor power consumption starter, and circuit is succinct, and is with low cost, wide accommodation.

Description

A kind of electronic temperature control device with the compressor start function

Technical field

The present invention relates to a kind of temperature control equipment, particularly the electronic temperature control device of small-sized refrigerating utensil.

Background technology

At present, adopt electronic technology to realize that temperature controlled scheme has a lot.The temperature controlling schemes overwhelming majority to the small-sized refrigerating utensil is to adopt traditional compression-type temperature controller, and its function singleness just realize temperature control, but it is with low cost, so obtained to be widely used.In recent years, along with growth in the living standard, people no longer satisfy simple temperature control requirement; On some refrigerating appliances, bring into use single-chip computer control system; It has also added many other functions except can realizing the temperature control function, such as temperature shows, touch key-press or the like; But, be a kind of simple start-stop to the control and the indifference of the control of the compressor of refrigerating appliance and traditional compression-type temperature controller.

The small-sized refrigerating utensil uses the single-phase AC compressor to realize refrigerating function usually, and the employed load motor of compressor generally has two windings, and one is main winding, and another is starting winding (also claiming auxiliary winding).The starting winding works when electric motor starting, and behind electric motor starting, needs to realize breaking off, and main winding is used to realize steady-state operation.Just because of the existence of starting winding is arranged, compressor has all attached trigger usually, and the trigger that uses at present has three types: Weight type trigger, PTC trigger, electronic type power consumption starter.The Weight type trigger is because the defective of self seldom use at present; The PTC trigger is because inexpensive present use is very extensive, but has the power consumption about 1～5 watt during its work, therefore at some energy consumption is had the refrigerating appliance of special demands and uses the electronic type power consumption starter, but this trigger costs an arm and a leg, so use seldom.

Summary of the invention

The purpose of this invention is to provide a kind of electronic temperature control device, to solve the defective that existing electronic temperature control device does not have the compressor start function with the compressor start function.Owing to be the compressor start function that on the basis of electronic temperature control device, realizes, so it is with low cost, and has realized no power consumption starting, meet current environmental requirement, have market application foreground widely.

The present invention is achieved in that the electronic temperature control device (hereinafter to be referred as " temperature controller ") of described band compressor start function, is made up of power circuit 1, single-chip microcomputer 7, compressor switch circuit 3, compressor start circuit 2, temperature-compensation circuit 4, adjustment and testing circuit 5 and LED lamp group 6.This temperature controller is formed a control system by single-chip microcomputer 7, and its power circuit 1 adopts capacitance decompression, and positive and negative then half-wave is handled respectively, and positive half cycle is wherein supplied power to single-chip computer control system after the rectifying and wave-filtering voltage stabilizing; The LED lamp group 6 that negative half period uses for the refrigerating appliance interior lighting after the rectifying and wave-filtering voltage stabilizing provides power supply; Done two benefits like this: the one, with low cost; Two is that two groups of power supplys are independent of each other; Be convenient to independent control, the power supply of the LED lamp group of using especially for the refrigerating appliance interior lighting 6 needs frequent switch; Can certainly after the rectifying and wave-filtering voltage stabilizing, supply power by negative half period, and the LED lamp group 6 that positive half cycle uses for the refrigerating appliance interior lighting after the rectifying and wave-filtering voltage stabilizing provides power supply to single-chip computer control system.Temperature controller detects the refrigerating appliance temperature inside through adjustment and testing circuit 5;, pass through by needs compressor switch circuit 3 Driven Compressor Cp when freezing; Meanwhile pass through the starting winding of compressor start circuit 2 Driven Compressor Cp; Through after compressor Cp starting, turn-offing compressor start circuit 2 after a while, so just realized compressor Cp start-up function.Compressor start circuit 2 is controlled through single-chip microcomputer 7, and the executive component of this starting circuit both can be that the bidirectional triode thyristor element also can be a relay.Have two to be connected lead between compressor start circuit 2 and the compressor Cp, one is connected with the starting winding S of compressor Cp, and another is connected with the starting winding S of compressor Cp and the common port C of main winding M.Original temperature controller has a lead that is connected with the starting winding S of compressor Cp just can realize the start-up function of compressor Cp; But the overload protective device P action protection that causes compressor Cp when unexpected reason; And overload protective device P cooling recover to connect after because the single-chip computer control system of temperature controller and do not know that overload of compressor protector P protection action then connected compressor Cp; Cause temperature controller can not provide initiating signal once more, thereby compressor Cp can't start once more.The problem that the compressor Cp that causes in order to solve overload of compressor protector P action can't start once more; We introduce a signal line at the starting winding S of compressor Cp and the common port C of main winding M (normally overload protective device P link to each other with compressor Cp an end) and give temperature controller; Temperature controller just can know when the overload protective device P of compressor Cp has moved like this; In case overload of compressor protector P action and when recovering temperature controller control compressor start circuit 2 immediately and reset once, so just can guarantee compressor Cp normal starting.

Accompanying drawing and description of drawings

Fig. 1 is a functional-block diagram of the present invention

Fig. 2 is a kind of embodiment schematic diagram of the present invention

Embodiment

Fig. 2 is a kind of embodiment schematic diagram of the present invention.

In Fig. 2, L, N are the single phase alternating current power supply incoming lines, and Cp is a compressor, and three incoming line S of compressor Cp, M, C are respectively starting winding, main winding and common ports, and P is the overload protective device of compressor, and H1 is the well heater that refrigerating appliance is used for temperature compensation.C1 is the capacitor that is used for step-down; U1 is a single-chip microcomputer; D3, R3, C3, D4, C4 constitute the single-chip computer control system power supply that the half-wave rectification stabilized voltage supply is given the electronic temperature control device of above-mentioned band compressor start function with the positive half cycle of AC power; The LED lamp group that D1, D2, R2, C2 use for the refrigerating appliance interior lighting with the negative half period formation half-wave stabilized voltage supply of AC power provides power supply; R6, Q2, R5, Q1, D5, K1 form the compressor switch circuit; D7, R8, D6, R9, Q4 form the compressor start circuit; Wherein Q4 is the bidirectional triode thyristor of Driven Compressor starting winding; Also can replace with relay, D7, R8, D6 form the signal deteching circuit of overload of compressor protector action, and this signal is sent into single-chip computer control system; W1, RW, R10, R11, C5 form adjustment and testing circuit.

The principle of work of above-mentioned temperature controller is such: the control system of forming when single-chip microcomputer 7 (hereinafter to be referred as single-chip computer control system) detects through adjustment and testing circuit 5 and exports control signal when the refrigerating appliance temperature inside is higher than the temperature that the user sets and remove Driven Compressor Cp main winding M to compressor switch circuit 3; Meanwhile exporting control signal removes the starting winding S of Driven Compressor Cp for compressor start circuit 2; The main winding M of compressor Cp and starting winding S are simultaneously like this; Compressor Cp is able to running, and compressor Cp running back single-chip computer control system is exported control signal close compressor starting circuit 2 immediately.After compressor Cp breaks off because of unexpected reason overload protective device P action; In case overload protective device P is closed again; The signal deteching circuit of the overload of compressor protector action that D7, R8, D6 form is just sent signal into single-chip computer control system immediately; System exports the starting winding S that control signal removes Driven Compressor Cp for compressor start circuit 2 immediately, and compressor Cp main winding M and starting winding S obtain the electricity starting simultaneously.

Claims

1. electronic temperature control device with the compressor start function; Form by power circuit [1], single-chip microcomputer [7], compressor switch circuit [3], compressor start circuit [2], temperature-compensation circuit [4], adjustment and testing circuit [5] and LED lamp group [6]; It is characterized in that: described compressor start circuit [2] has two leads to be connected with compressor [Cp]: a lead is connected with the starting winding [S] of compressor [Cp], and another is connected with the starting winding [S] of compressor [Cp] and the common port [C] of main winding [M]; Described power circuit [1] is that its positive half cycle provides power supply after the rectifying and wave-filtering voltage stabilizing, for the control system of above-mentioned single-chip microcomputer [7] composition after adopting capacitor step-down and step-down, and the LED lamp group [6] that negative half period uses for the refrigerating appliance interior lighting after the rectifying and wave-filtering voltage stabilizing provides power supply.

2. electronic temperature control device according to claim 1 is characterized in that the driving execution element that described compressor start circuit [2] is adopted realized by bidirectional triode thyristor.

3. electronic temperature control device according to claim 1 is characterized in that the driving execution element that described compressor start circuit [2] is adopted realized by relay.

4. electronic temperature control device according to claim 1; It is characterized in that described power circuit [1] is that its negative half period provides power supply after the rectifying and wave-filtering voltage stabilizing, for the control system of above-mentioned single-chip microcomputer [7] composition after adopting capacitor step-down and step-down, the LED lamp group [6] that positive half cycle uses for the refrigerating appliance interior lighting after the rectifying and wave-filtering voltage stabilizing provides power supply.