CN103246298A - Control circuit for constant temperature and constant temperature device - Google Patents
Control circuit for constant temperature and constant temperature device Download PDFInfo
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- CN103246298A CN103246298A CN2013101687897A CN201310168789A CN103246298A CN 103246298 A CN103246298 A CN 103246298A CN 2013101687897 A CN2013101687897 A CN 2013101687897A CN 201310168789 A CN201310168789 A CN 201310168789A CN 103246298 A CN103246298 A CN 103246298A
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- refrigeration motor
- state relays
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Abstract
The invention discloses a control circuit for constant temperature and a constant temperature device, which comprises a control circuit board, and further comprises a primary refrigeration motor, a secondary refrigeration motor, a heating device, and a humidifying device all connected with a triphase power supply through solid-state relays, wherein a primary refrigeration motor output control interface, a secondary refrigeration motor output control interface, a heating device output control interface, and a humidifying device output control interface are arranged on the control circuit board; and the solid-state relays of the primary refrigeration motor, the secondary refrigeration motor, the heating device, and the humidifying device are connected with corresponding output interfaces on the control circuit respectively. According to the control circuit, as the solid-state relays have no machine parts, the contact function is finished by a solid device; as the solid-state relays have no moving parts, the solid-state relays can work in the environment with high impact and vibration; and as intrinsic properties of components of the solid-state relays, high service life and reliability of the solid-state relays are determined.
Description
Technical field
The present invention relates to control circuit, be specifically related to the control circuit of a kind of constant temperature, thermostat
.
Background technology
In the prior art, there is the mechanism in some constant temperature, thermostat to be opened or to disconnect according to the needs of working environment, normally adopt A.C. contactor to be cut-off control, there is following shortcoming in it: have the control coil power consumption large, do not reach equilibrium activity, easily breakdown, during work, noise is large.
Summary of the invention
The object of the invention is to, for the above-mentioned defect of prior art, provide a kind of control circuit for constant temperature, thermostat, can, in HI high impact, work under the environment of vibration.
Provide a kind of for constant temperature, the control circuit of thermostat, comprise control circuit board, described control circuit board is provided with one-level refrigeration motor output control interface, two-stage system cool electric machine output control interface, heating arrangement output control interface, heating arrangement output control interface, damping device output control interface, also comprise the one-level refrigeration motor be connected with three-phase supply by solid-state relay respectively, the two-stage system cool electric machine, heating arrangement, damping device, described one-level refrigeration motor, the two-stage system cool electric machine, heating arrangement, the solid-state relay of damping device is connected with the corresponding output interface on described control circuit respectively.
At the above-mentioned control circuit for constant temperature, thermostat, also comprise the scarce anti-phase control module be connected with three-phase supply.
Advantage of the present invention: high life, highly reliable: solid-state relay does not have component of machine, complete the contact function by solid state device, due to the parts that there is no motion, therefore can be in HI high impact, under the environment of vibration, work, due to the inherent characteristic of the components and parts that form solid-state relay, the life-span that has determined solid-state relay is long, and reliability is high.Highly sensitive, power ratio control is little, and Electro Magnetic Compatibility is good: the input voltage range of solid-state relay is wider, and driving power is low, can not need to add impact damper or driver with most of logical integrated circuit compatibilities.Conversion fast: solid-state relay is because adopt solid state device, so switch speed can be from several milliseconds to several delicate.Electromagnetic interference (EMI) is little: solid-state relay is input " coil " not, there is no contact striking and rebound, thereby has reduced electromagnetic interference (EMI).It is a zero voltage switch that great majority exchange the output solid-state relay, and in the conducting of no-voltage place, turn-off at the zero current place, has reduced the unexpected interruption of current waveform, thereby reduced the switching transient effect; Power-saving balanced; Heating can proportionally be exported.
The accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
Shown in Fig. 1, design a kind of for constant temperature, the control circuit of thermostat, be provided with control circuit board, control circuit board is provided with one-level refrigeration motor output control interface 41, two-stage system cool electric machine output control interface 31, heating arrangement output control interface 21, damping device output control interface 11, also comprise respectively by 4 solid- state relays 1, 2, 3, the 4 one-level refrigeration motors 9 that are connected with three-phase supply, two-stage system cool electric machine 8, heating arrangement 7, damping device 6, one-level refrigeration motor 9, two-stage system cool electric machine 8, heating arrangement 7, 4 solid-state relays 1 of damping device 6, 2, 3, 4 respectively with corresponding output interface 11 on described control circuit, 21, 31, 41 are connected.
At the above-mentioned control circuit for constant temperature, thermostat, also be provided with the scarce anti-phase control module 5 be connected with three-phase supply, can disconnecting circuit when phase shortage or misphase, thus protective device can not damage.
Because the present invention adopts the noncontacting switch device with relay spy of semiconductor devices as switching device shifter, single-phase SSR is four end active devices, two input control ends wherein, two output terminals, it between input and output, is the light isolation, input end adds that direct current or pulse signal are after certain current value, and output terminal just can be transformed into on-state from off-state.Constant current source type and crosstalk that ac solid relay divides the voltage zero-cross conducting type is arranged (abbreviation zero-based) and random conducting type (abbreviation stochastic pattern) to divide by the output switch element by on-off mode to be had bidirectional triode thyristor output type (plain edition) and one-way SCR inverse parallel type (enhancement mode) to divide by mounting means the needle-inserted used on printed-wiring board (PWB) is arranged (naturally cooling, needn't with heating radiator) and be fixed on the other input end of device formula (cooling by heating radiator) on metal base plate has again wide region to input (DC3 ~ 32V) hinder current-limiting type etc.The SSR solid-state relay, with the triggering form, can be divided into two kinds, zero-pressure type (Z) and phase modulation type (P).When input end applies suitable control signal IN, P type SSR conducting immediately.After IN cancels, when maintaining electric current lower than bidirectional triode thyristor, load current (exchanges commutation), and SSR turn-offs.Z-type SSR inside comprises zero cross detection circuit, when applying input signal IN, only has when load power source voltage reaches the zero passage district, and SSR could conducting, and likely causes the maximum delay of power supply half period.Z-type SSR turn-off criterion is with the P type, but, due to loaded work piece electric current near sinusoidal ripple, higher hamonic wave is disturbed little, so be widely used.When being added with inductive load, before input signal cut-off t1, the bidirectional triode thyristor conducting, after current hysteresis during the pure sense of supply voltage 90O().T1 constantly, cancel by input control signal, and bidirectional triode thyristor turn-offs (t2) being less than while maintaining electric current, and controllable silicon will bear the reverse voltage that voltage build-up rate dv/dt is very high.This voltage will be by the junction capacity of bidirectional triode thyristor inside, the positive and negative grid that is fed to.If (representative value 10V/ s will cause that commutation is long even failed release time to surpass bidirectional triode thyristor commutation dv/dt index.One-way SCR (enhancement mode SSR) is owing to being in the unipolarity duty, now only be subject to the quiescent voltage escalating rate to limit (representative value 200V/ s), so enhanced solid-state relay HS series has improved 5 ~ 20 times than the commutation dv/dt index of plain edition SSR.Owing to adopting two high-power one-way SCR inverse parallels, changed electric current and distributed and heat conduction condition, improved the SSR output power.No matter enhancement mode SSR, in the high-power applications occasion, is inductive load or resistive load, and the reliability of proof voltage, anti-rush of current and product, all over common solid-state relay.
Claims (2)
1. one kind for constant temperature, the control circuit of thermostat, comprise control circuit board, described control circuit board is provided with one-level refrigeration motor output control interface, two-stage system cool electric machine output control interface, heating arrangement output control interface, damping device output control interface, it is characterized in that: also comprise the one-level refrigeration motor be connected with three-phase supply by solid-state relay respectively, the two-stage system cool electric machine, heating arrangement, damping device, described one-level refrigeration motor, the two-stage system cool electric machine, heating arrangement, the solid-state relay of damping device is connected with the corresponding output interface on described control circuit respectively.
2. the control circuit for constant temperature, thermostat according to claim 1, is characterized in that, also comprises the scarce anti-phase control module be connected with three-phase supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101687897A CN103246298A (en) | 2013-05-09 | 2013-05-09 | Control circuit for constant temperature and constant temperature device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101687897A CN103246298A (en) | 2013-05-09 | 2013-05-09 | Control circuit for constant temperature and constant temperature device |
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| CN103246298A true CN103246298A (en) | 2013-08-14 |
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| CN2013101687897A Pending CN103246298A (en) | 2013-05-09 | 2013-05-09 | Control circuit for constant temperature and constant temperature device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104378091A (en) * | 2014-11-07 | 2015-02-25 | 芜湖新兴铸管有限责任公司 | Solid-state relay monitoring circuit |
| CN114924602A (en) * | 2022-07-21 | 2022-08-19 | 广东海新智能厨房股份有限公司 | Electric heating system of integrated oven and control method |
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| CN2468083Y (en) * | 2001-03-13 | 2001-12-26 | 杨元昌 | Electronic temperature & moisture controller |
| US20060026976A1 (en) * | 2004-07-20 | 2006-02-09 | Carpenter Frank K | Climate control and dehumidification system and method |
| CN101021726A (en) * | 2007-03-15 | 2007-08-22 | 中国科学院测量与地球物理研究所 | Superconducting gravimeter double-temperature refrigerating expander intelligent monitor |
| CN101138307A (en) * | 2007-05-26 | 2008-03-12 | 襄樊学院 | Humiture grid point controlling instrument |
| US20090001182A1 (en) * | 2007-06-28 | 2009-01-01 | Honeywell International Inc. | Thermostat with fixed segment display having both fixed segment icons and a variable text display capacity |
| CN101551682A (en) * | 2009-04-30 | 2009-10-07 | 重庆哈丁科技有限公司 | Intelligent high-low temperature test box temperature control system |
| CN202615253U (en) * | 2011-12-29 | 2012-12-19 | 昆明理工大学 | Multiple-transmission-mode intelligent temperature and humidity transmitter |
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2013
- 2013-05-09 CN CN2013101687897A patent/CN103246298A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2468083Y (en) * | 2001-03-13 | 2001-12-26 | 杨元昌 | Electronic temperature & moisture controller |
| US20060026976A1 (en) * | 2004-07-20 | 2006-02-09 | Carpenter Frank K | Climate control and dehumidification system and method |
| CN101021726A (en) * | 2007-03-15 | 2007-08-22 | 中国科学院测量与地球物理研究所 | Superconducting gravimeter double-temperature refrigerating expander intelligent monitor |
| CN101138307A (en) * | 2007-05-26 | 2008-03-12 | 襄樊学院 | Humiture grid point controlling instrument |
| US20090001182A1 (en) * | 2007-06-28 | 2009-01-01 | Honeywell International Inc. | Thermostat with fixed segment display having both fixed segment icons and a variable text display capacity |
| CN101551682A (en) * | 2009-04-30 | 2009-10-07 | 重庆哈丁科技有限公司 | Intelligent high-low temperature test box temperature control system |
| CN202615253U (en) * | 2011-12-29 | 2012-12-19 | 昆明理工大学 | Multiple-transmission-mode intelligent temperature and humidity transmitter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104378091A (en) * | 2014-11-07 | 2015-02-25 | 芜湖新兴铸管有限责任公司 | Solid-state relay monitoring circuit |
| CN114924602A (en) * | 2022-07-21 | 2022-08-19 | 广东海新智能厨房股份有限公司 | Electric heating system of integrated oven and control method |
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Application publication date: 20130814 |