CN101320277B - Electronic temperature controller - Google Patents
Electronic temperature controller Download PDFInfo
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- CN101320277B CN101320277B CN2008100681290A CN200810068129A CN101320277B CN 101320277 B CN101320277 B CN 101320277B CN 2008100681290 A CN2008100681290 A CN 2008100681290A CN 200810068129 A CN200810068129 A CN 200810068129A CN 101320277 B CN101320277 B CN 101320277B
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- relay
- module
- temperature controller
- electronic temperature
- voltage stabilizing
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Abstract
The present invention relates to an electronic temperature controller, which comprises a lead-in end, a lead-out end, an operating switch, a second relay and a single chip; wherein, the lead-in end is connected with the control end of an external first relay, and the lead-out end is connected with one end of an external power supply; one end of the operating switch is connected with the lead-in end, and the other end is connected with the common contact terminal of the second relay; the normally opened contact terminal of the second relay is connected with the lead-out end, and the control end is connected with the output end of the single chip. The electronic temperature controller also comprises a voltage-sampling module and a voltage-stabilizing module; wherein, the voltage-sampling module comprises two inputs, one of which is connected with the common contact terminal of the second relay and the other one of which is connected with the normally opened contact terminal of the second relay; the output end of the voltage-sampling module is connected with the input end of the voltage-stabilizing module; the output end of the voltage-stabilizing module is connected with the input end of the single chip. Because the inputs of the voltage-sampling module and the voltage-stabilizing module of the electronic temperature controller are obtained from the common contact terminal and the normally opened contact terminal of the second relay, no matter the second relay is closed or opened, the electronic temperature controller can still be electrified from the outside and does not additionally need batteries, as a result, the cost is reduced, and use is convenient.
Description
Technical field
The present invention relates to a kind of electronic temperature controller, especially be applied to the temperature controller of central air conditioner terminal.
Background technology
For the central air conditioner in the family that is installed on hotel, company and top grade, cold air or heating installation can be sent in each room at present, and temperature is regulated in each room as required.Therefore need a temperature controller be installed all in each room, control the Push And Release of cold air or heating installation according to temperature.
Traditional temperature controller has mechanical type and electronic type, and is mechanical because function is comparatively simple, and temperature control is inaccurate seldom to be adopted.And the temperature controller of electronic type is owing to generally all be to adopt the mode that single line advances, single line goes out to come wiring to save installation cost when installing, so the power supply of temperature controller itself generally all is the employing powered battery.The shortcoming that adopts powered battery to exist is, need often to change battery, use inconvenient, bring certain trouble to the user, and can increase the cost and the volume of controller, and increase user's use cost, such as for the hotel, if the room is many, changes battery and also can bring a lot of extra use, handling costs to the client.
Summary of the invention
The technical problem to be solved in the present invention overcomes above defective exactly, proposes a kind of electronic temperature controller, and it still adopts the mounting means that existing single line advances, single line goes out, and can provide power supply to temperature controller, need not to add in addition the battery power supply.
Technical matters of the present invention is achieved by the following technical programs.
This electronic temperature controller, comprise end of incoming cables and leading-out terminal, described end of incoming cables is connected with the control end of extraneous first relay, described leading-out terminal is connected with extraneous power supply one end, also comprise operating switch, second relay and CPU, one end of described operating switch connects the end of incoming cables, the other end connects the public contact of second relay, the normally open contact of described second relay connects leading-out terminal, the control end of described second relay is connected with the output terminal of CPU, it is characterized in that: also comprise pressure module and Voltage stabilizing module, described pressure module comprises the two-way input, and one the tunnel connects the public contact of second relay, and another road connects the normally open contact of second relay, the output terminal of pressure module is connected with the input end of Voltage stabilizing module, and the output terminal of Voltage stabilizing module is connected with the input end of CPU.
Also comprise boost module, the input end of described pressure module is connected by the normally open contact of boost module with second relay.
Described pressure module comprises the resistance and the stabilivolt of series connection, and described Voltage stabilizing module comprises the voltage stabilizing chip, and the input end and the stabilivolt of described voltage stabilizing chip are connected in parallel.
Described boost module comprises the chip that boosts, and the normally open contact of described second relay also is connected with the buck diode group, and described chip and the described buck diode group of boosting is connected in parallel.
Be provided with first commutation diode, described pressure module is connected with the public contact of second relay with first commutation diode series connection back.
Be provided with second commutation diode, described boost module is connected with the normally open contact of second relay with second commutation diode series connection back.
Described second relay is a time pulse relay.
The present invention is compared with the prior art the beneficial effect that is had: be provided with pressure module and Voltage stabilizing module and power supply be provided for the control circuit of temperature controller, the public contact and the normally open contact of second relay taken from the voltage input of pressure module, such second relay adhesive or disconnection can obtain power supply from the external world for controller, and need not to be equipped with battery for temperature controller separately, reduced the cost of installation and use of controller, and use, more convenient when managing.
Description of drawings
Fig. 1 is a specific embodiment of the invention circuit block diagram;
Fig. 2 is the circuit diagram of the specific embodiment of the invention.
Embodiment
Electronic temperature controller as shown in Figure 1 comprises operating switch S2, second relay J 2, CPU5, boost module 2, pressure module 3 and Voltage stabilizing module 4.Temperature controller has two terminals, is connected with the control coil of first relay in the external world and extraneous power supply terminal respectively.The public contact and the normally open contact of the control coil of power supply 1, first relay J 1, operating switch S2, second relay J 2 are linked to be the loop.The control input end of second relay J 2 is connected with CPU 5, by the adhesive or the disconnection of CPU 5 controls second relay J 2.
Pressure module 3 comprises the two-way input, and one the tunnel is connected on the public contact of second relay J 2, and when second relay J 2 disconnected, public contact place voltage was higher, and directly power taking is pressed; Be connected on the normally open contact of second relay J 2 behind another road connection booster circuit 2, when 2 adhesives of second relay J, get buck diode group 6 preceding voltages.The output terminal of pressure module 3 connects Voltage stabilizing module 3, and Voltage stabilizing module 3 outputting standard voltages are given CPU 5 power supplies.
As shown in Figure 2, central air conditioner is provided with interchange first relay of three 24V and controls fan respectively, heating and refrigeration, and being provided with a 24V transformer T1 provides power supply to three first relays.
The operating switch S2 of temperature controller is cold/thermal switch, is mechanical switch, by the convertible refrigeration of this switch or heat process, also can turn off system.The one end is divided into two-way, is connected with the control coil that heats relay by the refrigeration relay of an interface chip with the external world.The other end is connected with the public contact of second relay J 2, second relay J 2 is selected the G5AK-234P relay for use, be the trigger action relay, required drive current is very little, is used to control extraneous refrigeration relay, the adhesive that heats relay or disconnection, thus control cold wind or hot blast, its control coil is connected with single-chip microcomputer, single-chip microcomputer U3 selects the 78F9200 plate for use, and its output signal connects second relay J 2 behind triode TR1 or triode TR2, control the adhesive or the disconnection of second relay J 2.
Public contact in second relay J 2 has also picked out resistance R 1, diode D4, voltage stabilizing diode Z2, diode D2, constitutes the loop with extraneous transformer secondary, the control coil that heats relay or refrigeration relay.Be provided with voltage stabilizing chip U2, the voltage stabilizing chip is selected the AP2121 three terminal regulator for use, and its input end is connected in parallel on the two ends of voltage stabilizing diode Z2.When the user gets to operating switch S2 when heating the position, temperature required if temperature has arrived, single-chip microcomputer 5 controls second relay disconnects.At this moment, extraneous heat relay, operating switch S2, resistance R 1, diode D4, voltage stabilizing diode Z2, diode D2 and transformer form the loop, from transformer input power supply.And voltage stabilizing diode Z2 is the stabilivolt of 6.8V, powers to single-chip microcomputer U3 by 3.3V voltage can be provided behind the three-terminal voltage-stabilizing chip U2.This moment is because second relay J 2 is trigger action, do not need to keep voltage after triggering disconnection, so temperature controller does not need power consumption basically, as long as keep single-chip microcomputer U3 work, general 3-5mA gets final product, and can limit maximum electric current by adjustment resistance R 1 and be no more than 3-5mA.Be enough to the work of holding temperature controller by heating the electric current that relay comes like this, and because the electric current by heating relay control coil is very little, heating relay can adhesive.Wherein, diode D4 plays the effect of rectification, because this system's use is the 24V alternating current.So use diode that alternation is filtered, other half-wave is whole to be direct current confession stabilivolt diode Z2.
Normally open contact in second relay J 2 has picked out the buck diode group, and the buck diode group comprises diode D6～D10, and normally open contact has also picked out diode D1, inductance L 1, capacitor C 1, diode D3, chip U1 boosts.The chip U1 that boosts adopts BL-8530.When operating switch S2 gets to when heating the position, if temperature does not reach design temperature, 2, the second relay adhesives of 5 trigger action of single-chip microcomputer, second relay J, thus heat the relay adhesive.Because this heats the electric current ability operate as normal that relay needs 200mA, so first relay J, 1 adhesive after-current is by diode group D5～D10, because the diode group can flow through the electric current of 1A, so system can operate as normal.About the about altogether 3V of the tube voltage drop of triode D6～D10, by the chip U2 that boosts, boost to 6VDC, voltage stabilizing diode pipe Z2 at this moment also can operate as normal.Therefore, still can give single-chip microcomputer U3 power supply after 2 adhesives of second relay J by three-terminal voltage-stabilizing chip U2.So no matter the second relay adhesive or break-off signal controller can both operate as normal.Wherein, diode D1, diode D2 also are the effects of playing rectification.Capacitor C 1, inductance L 1, diode D3 form a booster circuit, and the electric current of this current drain also seldom, can not influence the operate as normal that heats relay.
When operating switch S2 was positioned at the refrigeration position, the circuit working process was as above similar.
The control of fan is then controlled by switch S 1, does not need the control through single-chip microcomputer 5.
Toggle switch S3 is an adjustable resistor, can allow single-chip microcomputer 5 detect design temperature by AD.Resistance R 9 is thermistors, but the variation of detected temperatures provides contrast signal
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (5)
1. electronic temperature controller, comprise end of incoming cables and leading-out terminal, described end of incoming cables is connected with the control end of extraneous first relay (J1), described leading-out terminal is connected with extraneous power supply one end, also comprise operating switch (S2), second relay (J2) and CPU (5), one end of described operating switch (S2) connects the end of incoming cables, the other end connects the public contact of second relay (J2), the normally open contact of described second relay (J2) connects leading-out terminal, the control end of described second relay (J2) is connected with the output terminal of CPU (5), it is characterized in that:
Described second relay (J2) is a time pulse relay;
Also comprise pressure module (3) and Voltage stabilizing module (4), described pressure module (3) comprises the two-way input, one the tunnel connects the public contact of second relay (J2), another road connects the normally open contact of second relay (J2), the output terminal of pressure module (3) is connected with the input end of Voltage stabilizing module (4), and the output terminal of Voltage stabilizing module (4) is connected with the input end of CPU (5);
Also comprise boost module (2), the input end of described pressure module (3) is connected with the normally open contact of second relay (J2) by boost module (2).
2. electronic temperature controller as claimed in claim 1, it is characterized in that described pressure module (3) comprises the resistance (R1) and the stabilivolt (Z2) of series connection, described Voltage stabilizing module (4) comprises the voltage stabilizing chip, and the input end of described voltage stabilizing chip and stabilivolt (Z2) are connected in parallel:.
3. electronic temperature controller as claimed in claim 2, it is characterized in that: described boost module (2) comprises the chip that boosts, the normally open contact of described second relay (J2) also is connected with the buck diode group, and described chip and the described buck diode group of boosting is connected in parallel.
4. electronic temperature controller as claimed in claim 3 is characterized in that: be provided with first commutation diode (D4), described pressure module (3) is connected with the public contact of second relay (J2) with first commutation diode (D4) series connection back.
5. electronic temperature controller as claimed in claim 3 is characterized in that: be provided with second commutation diode (D1), described boost module (2) is connected with the normally open contact of second relay (J2) with second commutation diode (D1) series connection back.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100681290A CN101320277B (en) | 2008-06-27 | 2008-06-27 | Electronic temperature controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100681290A CN101320277B (en) | 2008-06-27 | 2008-06-27 | Electronic temperature controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101320277A CN101320277A (en) | 2008-12-10 |
| CN101320277B true CN101320277B (en) | 2010-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100681290A Expired - Fee Related CN101320277B (en) | 2008-06-27 | 2008-06-27 | Electronic temperature controller |
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| Country | Link |
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| CN (1) | CN101320277B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226563B (en) * | 2011-06-03 | 2013-09-25 | 深圳和而泰智能控制股份有限公司 | Low-cost self-study temperature controller and its methods |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2081993U (en) * | 1991-03-09 | 1991-07-31 | 天津铁路分局古冶电务段 | Automatic temp controller for air conditioner |
| CN201014672Y (en) * | 2006-12-25 | 2008-01-30 | 陈志冲 | Electricity-saving device of air conditioner |
-
2008
- 2008-06-27 CN CN2008100681290A patent/CN101320277B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2081993U (en) * | 1991-03-09 | 1991-07-31 | 天津铁路分局古冶电务段 | Automatic temp controller for air conditioner |
| CN201014672Y (en) * | 2006-12-25 | 2008-01-30 | 陈志冲 | Electricity-saving device of air conditioner |
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| Publication number | Publication date |
|---|---|
| CN101320277A (en) | 2008-12-10 |
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