CN102323835B

CN102323835B - A kind of electronic thermostat of band compressor start-up function

Info

Publication number: CN102323835B
Application number: CN201110113537.5A
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: 2016-08-10
Anticipated expiration: 2031-05-03
Also published as: CN102323835A

Abstract

The electronic thermostat of a kind of band compressor start-up function, is made up of power circuit [1], single-chip microcomputer [7], compressor switch circuit [3], compressor start circuit [2], temperature-compensation circuit [4], temperature regulation and testing circuit [5] and LED group [6].This temperature controller is formed a control system by single-chip microcomputer, and its power circuit uses capacitance decompression, and the most positive and negative half-wave processes respectively, and the control system forming to single-chip microcomputer [7] after the rectified filtering voltage regulation of positive half cycle therein is powered；The LED group [6] giving refrigerating appliance interior lighting after the rectified filtering voltage regulation of negative half period provides power supply；Having two to be connected wire between compressor start circuit [2] with 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 achieves the function of traditional compressor power consumption starter with very simple circuit on electronic thermostat, and simple circuit is with low cost, wide accommodation.

Description

A kind of electronic thermostat of band compressor start-up function

Technical field

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

Background technology

At present, use electronic technology to realize temperature controlled scheme to have a lot.For small-sized refrigerating utensil Temperature control scheme mostly uses traditional compression-type temperature controller, its function singleness, simply realizes temperature Degree controls, but it is with low cost, is widely used so obtaining.In recent years, carrying along with living standard Height, people no longer meet simple temperature control requirement, begin to use single-chip microcomputer control on some refrigerating appliances System processed, it is in addition to can realizing temp. control function, also addition of other functions many, such as warm Degree display, touch key-press etc., but controlling and traditional compression-type temperature controller the compressor of refrigerating appliance Control and zero difference, simply a kind of simple start-stop.

Small-sized refrigerating utensil generally uses single phase ac compressor to realize refrigerating function, and compressor is used Load motor typically has two windings, and one is main winding, another for start winding (also known as secondary around Group).Start winding to work when electric motor starting, and need to realize disconnecting after electric motor starting, and main winding For realizing steady-state operation.Just because of there being the existence starting winding, compressor is the most all accompanied with starter, Currently used starter has three types: Weight type starter, PTC starter, electronic type idle rise Dynamic device.Weight type starter is rarely employed the most due to the defect of self；PTC starter is due to inexpensive mesh Front use is very extensive, but has the power consumption of about 1～5 watt during its work, therefore has energy consumption especially at some The refrigerating appliance that requires and use electronic type power consumption starter, but this starter is expensive, institute so that With seldom.

Summary of the invention

It is an object of the invention to provide the electronic thermostat of a kind of band compressor start-up function, existing to solve Electronic thermostat does not have the defect of compressor start function.Owing to being realization on the basis of electronic thermostat Compressor start function, therefore it is with low cost, and achieve idle start, meet current environmental protection want Ask, there is market application foreground widely.

The present invention is achieved in that the electronic thermostat of described band compressor start-up function (hereinafter referred to as " temperature controller "), by power circuit 1, single-chip microcomputer 7, compressor switch circuit 3, compressor start circuit 2, The regulation of temperature-compensation circuit 4, temperature and testing circuit 5 and LED group 6 form.This temperature controller is by monolithic Machine 7 forms a control system, and its power circuit 1 uses capacitance decompression, and the most positive and negative half-wave processes respectively, Power to single-chip computer control system after the rectified filtering voltage regulation of positive half cycle therein；The rectified filtering of negative half period is steady Power supply, do so is provided to have two benefits to after pressure the LED group 6 of refrigerating appliance interior lighting: one is With low cost, two is that two groups of power supplys are independent of each other, it is simple to individually control, especially for refrigerating appliance inside The power supply of illuminating LED group 6 needs often switch；Can certainly the rectified filtering voltage regulation of negative half period Power to single-chip computer control system afterwards, and use to refrigerating appliance interior lighting after the positive rectified filtering voltage regulation of half cycle LED group 6 power supply is provided.Temperature controller is detected inside refrigerating appliance by temperature regulation and testing circuit 5 Temperature, drive compressor Cp when needs freeze by compressor switch circuit 3, meanwhile by pressure Contracting machine starting circuit 2 drives the starting winding of compressor Cp, through after a while when compressor Cp start with Rear shutoff compressor start circuit 2, thus achieves compressor Cp start-up function.Compressor start circuit 2 are controlled by single-chip microcomputer 7, the executive component of this starting circuit both can be bidirectional triode thyristor element also It can be relay.Two are had to be connected wire between compressor start circuit 2 with compressor Cp, one and pressure The starting winding S of contracting machine Cp connects, another starting winding S with compressor Cp and the public affairs of main winding M End C is connected altogether.Original temperature controller has a wire being connected with the starting winding S of compressor Cp just energy real The start-up function of existing compressor Cp, but when unexpected reason causes the overload protective device P of compressor Cp to move Protect, and overload protective device P cooling recover connect after because temperature controller single-chip computer control system not Know that compressor overload protector P protection act has connected the most again compressor Cp, cause the temperature controller can not be again The secondary starting signal that is given, thus compressor Cp cannot start again.In order to solve compressor overload protector The problem that P action and the compressor Cp that causes cannot start again, we are at the starting winding S of compressor Cp One is introduced with the common port C (one end that typically overload protective device P is connected with compressor Cp) of main winding M Holding wire is to temperature controller, and such temperature controller just can know that the overload protective device P when action of compressor Cp, Compressor start circuit 2 weight is controlled immediately once compressor overload protector P action and recovery temperature controller New starting once, thus can guarantee that compressor Cp normal starting.

Accompanying drawing and accompanying drawing explanation

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

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

Detailed description of the invention

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

In fig. 2, L, N are single phase alternating current power supply input lines, and Cp is compressor, three of compressor Cp Input line S, M, C are to start winding, main winding and common port respectively, and P is the overload protective device of compressor, H1 is the refrigerating appliance heater for temperature-compensating.C1 is the capacitor for blood pressure lowering；U1 is single-chip microcomputer； The positive half cycle of D3, R3, C3, D4, C4 alternating current power supply constitutes halfwave rectifier regulated power supply to above-mentioned with pressure The single-chip computer control system of the electronic thermostat of contracting machine start-up function is powered；D1, D2, R2, C2 alternating current The negative half period in source constitutes half-wave regulated power supply provides power supply to the LED group of refrigerating appliance interior lighting；R6、 Q2, R5, Q1, D5, K1 form compressor switch circuit；D7, R8, D6, R9, Q4 composition compressor rises Galvanic electricity road, wherein Q4 is the bidirectional triode thyristor driving compressor start winding, it is also possible to replace with relay, The signal deteching circuit of D7, R8, D6 composition compressor overload protector action, sends this signal into single-chip microcomputer Control system；W1, RW, R10, R11, C5 composition temperature regulation and testing circuit.

The operation principle of above-mentioned temperature controller is such that the control system (letter below when single-chip microcomputer 7 composition Claim single-chip computer control system) detect that the temperature within refrigerating appliance is high by temperature regulation and testing circuit 5 In user set temperature time export control signal to compressor switch circuit 3 go drive compressor Cp master around Group M, meanwhile output control signal removes to drive the starting winding of compressor Cp to compressor start circuit 2 S, the main winding M of such compressor Cp and start winding S simultaneously electric, compressor Cp is operated, press After contracting machine Cp operating, single-chip computer control system exports control signal close compressor starting circuit 2 immediately.Work as pressure Contracting machine Cp is because after unexpected reason overload protective device P action disconnection, once overload protective device P closes again Closing, signal is soon sent by the signal deteching circuit of the compressor overload protector action of D7, R8, D6 composition Entering single-chip computer control system, system exports control signal immediately and goes to drive compressor to compressor start circuit 2 The starting winding S of Cp, compressor Cp main winding M and starting winding S obtain electrically actuated simultaneously.

Claims

1. an electronic thermostat for band compressor start-up function, by power circuit (1), single-chip microcomputer (7), Compressor switch circuit (3), compressor start circuit (2), temperature-compensation circuit (4), temperature regulation and Testing circuit (5) and LED group (6) composition, is characterized in that: described compressor start circuit (2) Two wires are had to be connected with compressor (Cp): a wire and the starting winding (S) of compressor (Cp) It is connected, another starting winding (S) with compressor (Cp) and the common port (C) of main winding (M) It is connected；Described power circuit (1) is to use its rectified filtering of positive half cycle after capacitor step-down and blood pressure lowering To above-mentioned single-chip microcomputer (7), compressor switch circuit (3), compressor start circuit (2), temperature after voltage stabilizing Degree compensates the control system offer power supply that circuit (4), temperature regulation and testing circuit (5) form, and bears half The LED group (6) giving refrigerating appliance interior lighting after all rectified filtering voltage regulations provides power supply.

2. an electronic thermostat for band compressor start-up function, by power circuit (1), single-chip microcomputer (7), Compressor switch circuit (3), compressor start circuit (2), temperature-compensation circuit (4), temperature regulation and Testing circuit (5) and LED group (6) composition, is characterized in that: described compressor start circuit (2) Two wires are had to be connected with compressor (Cp): a wire and the starting winding (S) of compressor (Cp) It is connected, another starting winding (S) with compressor (Cp) and the common port (C) of main winding (M) It is connected；Described power circuit (1) is to use the rectified filtering of its negative half period after capacitor step-down and blood pressure lowering To above-mentioned single-chip microcomputer (7), compressor switch circuit (3), compressor start circuit (2), temperature after voltage stabilizing Degree compensates the control system offer power supply that circuit (4), temperature regulation and testing circuit (5) form, positive half cycle The LED group (6) giving refrigerating appliance interior lighting after rectified filtering voltage regulation provides power supply.

Electronic thermostat the most according to claim 1, it is characterised in that described compressor start circuit (2) the driving executive component used is realized by bidirectional triode thyristor.

Electronic thermostat the most according to claim 1, it is characterised in that described compressor start circuit (2) the driving executive component used is realized by relay.

Electronic thermostat the most according to claim 2, it is characterised in that described compressor start circuit (2) the driving executive component used is realized by bidirectional triode thyristor.

Electronic thermostat the most according to claim 2, it is characterised in that described compressor start circuit (2) the driving executive component used is realized by relay.