CN210806728U - Economical and practical three-phase electric power temperature adjusting device - Google Patents
Economical and practical three-phase electric power temperature adjusting device Download PDFInfo
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- CN210806728U CN210806728U CN201922328369.6U CN201922328369U CN210806728U CN 210806728 U CN210806728 U CN 210806728U CN 201922328369 U CN201922328369 U CN 201922328369U CN 210806728 U CN210806728 U CN 210806728U
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Abstract
The utility model belongs to the technical field of adjust the temperature, concretely relates to economical and practical's three-phase electric power attemperator. The temperature control device comprises a temperature setting loop connected with three-phase power, and a line selection control loop, a high-temperature control loop and a low-temperature control loop which are connected in parallel and used for selecting a plurality of power equipment lines, wherein the plurality of power equipment lines are connected with a phase-failure protection unit in series respectively, and the phase-failure protection unit is connected with a three-phase power supply. The temperature adjusting equipment has flexible and convenient operation mode, is simple and reliable, and can be widely applied to places with higher requirements on environmental temperature control.
Description
Technical Field
The utility model belongs to the technical field of adjust the temperature, concretely relates to economical and practical's three-phase electric power attemperator.
Background
At present, most places still adopt manual temperature regulation to achieve specific parameters, and temperature regulation devices mainly solve the problems of ventilation and heat dissipation, closed heating, air conditioner installation and the like by means of manual feeding, cutting and cooling or heating devices; the existing defects are that the control accuracy is not high, time and labor are wasted, and the requirements of multifunctional and diversified operation of the system cannot be realized.
For example, in animal farming, it is desirable to maintain the temperature within the farming environment within a suitable range to promote healthy growth of the animals. For example, the temperature in the chicken farm is preferably controlled to be in the range of 25 ℃ to 30 ℃, ventilation is stopped when the temperature is lower than 25 ℃, and ventilation is accelerated when the temperature is higher than 30 ℃.
For example, a fan is a mechanical abbreviation for increasing gas pressure and conveying gas by compressing gas by means of input mechanical energy, and is a driven fluid machine. The so-called wind turbines include ventilators, blowers and wind power generators. The fan is mainly applied to ventilation in various fields of national economy such as metallurgy, petrifaction, electric power, urban rail transit, textile, ships and the like and various places.
Chinese patent publication No. CN104378042A describes a motor intermittent operation control circuit including a change-over switch, a fan starting time relay, a fan stopping time relay, a line main contactor, and an intermediate relay, wherein one end of the change-over switch is connected to a power supply and a fan stopping phase a, and the other end of the change-over switch is connected to a power supply N sequentially through a group of normally closed contacts of the change-over intermediate relay and a coil of the fan starting time relay; one end of a group of normally open contacts of the switching intermediate relay is connected with a power supply A phase, and the other end of the normally open contacts of the switching intermediate relay is connected with a power supply N through a coil of the fan stopping time relay; the coil of the line main contactor is connected between a normally open contact of an intermediate relay of the starting fan and a normally closed contact of an intermediate relay of the stopping fan, which are connected with the switching switch in parallel, and the main contact of the line main contactor is connected between the motor and the power supply; the other group of normally open contacts of the switching relay is connected with the normally open contacts of the fan starting time relay in parallel, one end of the switching relay is connected with the phase A of the power supply through the temperature-controlled high-temperature contact and the phase-failure latching contact, and the other end of the switching relay is connected with the coil of the switching intermediate relay and the normally closed contacts of the fan stopping time relay in series and then connected with the phase N of the power supply. The technical scheme can only realize the intermittent operation control of the load.
Disclosure of Invention
An object of the utility model is to provide an economical and practical's three-phase electric power attemperator to the problem that exists among the prior art, this attemperator operation is nimble convenient, and is simple reliable, can extensively be used for the higher place of environmental temperature control requirement.
The technical scheme of the utility model is that:
the utility model provides an economical and practical's three-phase electric power attemperator is applicable to the temperature control device who adjusts the temperature with three-phase electric power, include the temperature setting return circuit of being connected with three-phase electricity, mutual parallel connection be used for many circuit selection control circuit, high temperature control circuit and the low temperature control circuit of power equipment circuit selection, many circuit selection control circuit, high temperature control circuit and low temperature control circuit respectively with lack looks protection unit series connection, lack looks protection unit and three phase current be connected.
The temperature set loop include be used for setting for the control by temperature change relay KTE of temperature regulation and control scope with three-phase electricity connection, control by temperature change relay KTE including warm high contact and warm low contact.
Each line selection control loop comprises a selector switch for switching between manual operation and automatic operation, a line main contactor and a starting intermediate relay for starting the power equipment on the line, wherein a coil of the line main contactor is connected in series on the line selection control loop, a manual operation contact of the selector switch is connected with one end of a coil of the line main contactor, the other end of the coil of the main contactor is connected with a normally closed contact of the stopping intermediate relay for stopping the power equipment on the line, an automatic operation contact of the selector switch is connected with a normally open contact of the starting intermediate relay for starting the power equipment on the line, and the line main contactor is connected with the starting intermediate relay for starting the power equipment on the line and then connected with the normally closed contact of the stopping intermediate relay for stopping the power equipment on the line.
The high-temperature control loop comprises a switching intermediate relay connected with a temperature control relay KTE high-temperature contact, an alternating current contactor for controlling power equipment on a circuit, a time-limited starting time relay and a time-limited stopping time relay, wherein the switching intermediate relay comprises four groups of contacts which are respectively two groups of normally open contacts and two groups of normally closed contacts, one group of normally closed contacts of the switching intermediate relay is connected with the starting intermediate relay for starting the power equipment on the circuit in series, after the starting intermediate relay for the power equipment on the circuit acts, the two groups of normally open contacts are respectively connected with the alternating current contactor for controlling the power equipment on the circuit corresponding to the normally open contacts, the other group of normally closed contacts of the switching intermediate relay is connected with the time-limited starting time relay in series, one group of normally open contacts of the switching intermediate relay is connected with the time-limited stopping time, after the other group of normally open contacts of the switching intermediate relay is connected in parallel with the normally open contacts of the time-limited starting time relay, the normally open contacts are connected with a coil of the switching intermediate relay and are connected with the normally closed contacts of the time-limited stopping time relay, and switching of the switching intermediate relay according to a set program is achieved.
And the low-temperature contact of the temperature control relay KTE is connected with a coil of a stopping intermediate relay for stopping the power equipment.
Specifically, the open-phase protection unit comprises three micro intermediate relays which are respectively and randomly connected with a three-phase power supply, the three micro intermediate relays are connected with the three-phase power supply through air switches, and normally open contacts of the three micro intermediate relays form an AND gate loop to be connected with a main circuit selection control loop and an input end of a change-over switch.
Specifically, the line selection control circuit further comprises a start button connected with the line main contactor and a stop button connected with the line main contactor in series, and a normally open contact of a start intermediate relay for starting the power equipment on the line is connected with a contact of the start button in parallel.
The phase-failure alarm circuit comprises three miniature intermediate relays connected with a phase-failure protection unit and an audible and visual alarm device of a background system, wherein when any phase of power supply circuit is out of phase, a buzzer in the fault alarm circuit can give out buzzing sound, and a display connected with the fault alarm circuit displays that a certain phase of power supply is out of phase.
The circuit selection control circuit comprises a circuit selection control circuit, a line main contactor and an indication unit, wherein the line main contactor of the circuit selection control circuit is connected with a line main contactor, and the line main contactor of the line selection control circuit is connected with an operation indicator lamp and a stop indicator lamp.
The utility model discloses have the temperature setting circuit of being connected with the three-phase electricity, mutual parallel connection's the line selection control circuit, high temperature control circuit and the low temperature control circuit that are used for many power equipment circuit to select, many power equipment circuit selection control circuit, high temperature control circuit and low temperature control circuit respectively with lack looks protection unit series connection, lack looks protection unit be connected with three phase current, the starting mode has manual and automatic mode, but the operation of optional single platform or many operations, many circuit selection control circuit can move alone respectively, also can many moves simultaneously, the operation mode is nimble changeable to realize automatic switching by time relay and auxiliary relay cooperation, can realize adjusting the temperature fast, also can slowly adjust the temperature, the utility model discloses temperature regulating device is sensitive reliable, and convenient operation can realize unmanned on duty.
The utility model discloses set up and lack looks protection unit and lack looks alarm circuit, be convenient for in time learn equipment operation conditions, can avoid the problem that can not in time discover power supply failure among the equipment automatic operation process.
The utility model has the advantages that: compared with the prior art, the device has the advantages of simple structure, reasonable design, few used elements, low price, low cost, economy, applicability, reliable operation, flexible selection of manual or automatic operation modes and the like, is not interfered by external signals, can quickly and accurately send out corresponding fault signals particularly when a power supply system fails, and can conduct the signals to a background computer, so that the fault types are directly observed, and the device is convenient for operators on duty to process in time. The device provided by the utility model can adopt the setting of discrete plug spare, can pull out trouble component in the short time when device component trouble, inserts new component and continues the operation. The temperature control device is particularly suitable for places needing to adjust the room temperature, such as the breeding industry, the greenhouse planting industry and the like, and is also suitable for places needing to be electrically heated for temperature control adjustment, such as ovens, drying rooms and the like of industrial and mining enterprises.
FIG. 1 is a schematic wiring diagram of the present invention;
fig. 2 is a development view of a main circuit, a protection circuit and a detection circuit of the temperature control device provided in embodiment 1.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the accompanying drawings and embodiments.
Fig. 1 is a schematic wiring diagram of the temperature adjustment device provided in this embodiment, and fig. 2 is a primary system diagram of a main circuit and a development diagram of a protection and detection circuit thereof. The three-phase electric power temperature adjusting device comprises a temperature setting loop connected with a three-phase power supply, and a line selection control loop, a high-temperature control loop and a low-temperature control loop which are connected in parallel and used for selecting a plurality of electric power equipment lines, wherein the plurality of electric power equipment line selection control loops, the high-temperature control loop and the low-temperature control loop are respectively connected with a phase-lacking protection unit in series, and the phase-lacking protection unit is connected with the three-phase power supply. The temperature set return circuit include and be connected the control by temperature change relay KTE who is used for setting for the temperature regulation and control scope with control power supply, control by temperature change relay KTE include temperature high contact 6 and temperature low contact 8.
Each line selection control loop comprises a selector switch SA1 and a selector switch SA2 for switching between manual operation and automatic operation, a line main contactor KM1 and a line main contactor KM2, and a starting intermediate relay IKM for starting the power equipment on the line, wherein the coil of the line main contactor KM1 or the line main contactor KM2 is connected in series on the line selection control loop, the manual operation contact of the selector switch SA1 or the selector switch SA2 is connected with one end of the coil of the line main contactor KM1 or the line main contactor KM2 on the line where the manual operation contact is located, and the other end of the coil of the line main contactor KM1 or the line main contactor KM2 is respectively connected with two groups of normally closed contacts of a stopping intermediate relay 2KM for stopping the power equipment on the line. The automatic operation contact of the changeover switch SA1 or SA2 is connected to the normally open contact of the start relay IKM for starting the power equipment on the line, and the normally closed contact of the stop relay 2KM for stopping the power equipment on the line is connected in series after the connection of the line main contactor KM1 or the line main contactor KM2 to the start relay IKM for starting the power equipment on the line.
The high-temperature control loop comprises a main alternating current contactor KM1 and a main alternating current contactor KM2 which are connected with a high-temperature contact of a temperature control relay KTE to switch an intermediate relay KM and control starting of power equipment on a line, a time-limited starting time relay KT1 and a time-limited stopping time relay KT 2; one group of normally closed contacts of the switching intermediate relay KM is connected with a starting intermediate relay IKM of the starting fan in series, after the starting intermediate relay IKM of the starting fan acts, two groups of normally open contacts of the switching intermediate relay KM respectively start a main alternating current contactor KM1 and a main alternating current contactor KM2 which are connected with two lines, the other group of normally closed contacts of the switching intermediate relay KM is connected with a time-limited starting fan time relay KT1 in series, and one group of normally open contacts of the switching intermediate relay KM is connected with a time-limited stopping fan time relay KT2 in series; the switching intermediate relay KM of the high-temperature control loop is provided with four groups of (two normally open and two normally closed) contacts, and is used for respectively controlling the starting fan time relay KT1, the stopping fan time relay KT2, the starting fan intermediate relay 1KM and the starting and stopping of the switching intermediate relay KM. Wherein another group of normally open contact of switching auxiliary relay KM is again with time limit starting fan time relay KT1 normally open contact and hookup switching auxiliary relay coil one end, and the switching auxiliary relay coil other end is connected with time limit stop fan time relay KT2 normally closed contact, realizes switching auxiliary relay KM and switches according to the procedure of setting for.
The low-temperature contact of the temperature control relay KTE is only connected with a stopping intermediate relay 2KM for stopping the power equipment, and is not connected with any other element.
In the embodiment, two fan lines are selected for temperature adjustment, and taking the starting of the fans by the 1# line and the 2# line as an example, the temperature adjustment is mainly realized by changing the number of the three-phase fans and controlling the running time and the shutdown time of the three-phase fans. The 1# line selection control loop comprises a switching switch SA1 for switching between manual operation and automatic operation, a line main contactor KM1 and a starting intermediate relay 1KM for starting the power equipment on the line, and also comprises a starting button SB1 connected with the line main contactor KM1 and a stopping button SB2 connected with the line main contactor KM1 in series, wherein a normally open contact of the starting intermediate relay 1KM for starting the power equipment on the line is connected with a contact of a starting button SB1 in parallel.
The manual operation action process of the 1# line is as follows: when the 1# line operation is selected, the switch SA1 is turned on, the switch SA1 turns on the contacts 3 and 4, and the start button SB1 turns on the contacts 3 and 4 by pressing the start button SB 1. At the moment, the phase A of the control power supply is communicated with a control power supply N through a first group of normally closed contacts of a closed normally open contact of three intermediate relays 3KM, 4KM and 5KM, a selector switch SA1, a starting button SB1, a stopping button SB2, a coil of a line main contactor KM1 and a stopping intermediate relay 2KM for stopping a fan, the coil of the line main contactor KM1 is electrified, a load power circuit of a 1# line is communicated, and the fan carried by the 1# line runs.
When the 2# line manual operation mode is thrown into the same 1# line, the 1# line selector switch SA1 is turned off, the 2# line selector switch SA2 is turned on, the start button SB3 is pressed, and the start button SB3, contact 3 and contact 4 are turned on. At the moment, a phase A of a control power supply forms a passage through a closed normally-open contact of three intermediate relays 3KM, 4KM and 5KM, a selector switch SA2, a starting button SB3, a stopping button SB4, a line main contactor KM2 coil and a second group of normally-closed contacts of the intermediate relay 2KM, the line main contactor KM2 coil is electrified to operate, a 2# line load power supply circuit is switched on, and a fan carried by a 2# line operates.
If the 2 lines are selected to run simultaneously by manual operation, the 1# line selector switch SA1 is switched on by contact 3 and contact 4, the 2# line selector switch SA2 is switched on by contact 3 and contact 4, and the starting button SB1 and the starting button SB3 are simultaneously pressed to start the 1# line blower and the 2# line blower.
When the automatic operation mode is selected and the two lines operate simultaneously, the contact 3 and the contact 8 of the switch SA1 are switched on, the contact 3 and the contact 8 of the switch SA2 are switched on, and the 1# line fan and the 2# line fan are switched to the automatic operation mode. The start and stop of the temperature-regulating blower fan in each line are controlled by an upper limit (such as temperature high setting 30 ℃ start) and a lower limit (temperature low setting 25 ℃ stop) set by a temperature-control relay KTE, a time-limit start time relay KT1 and a time-limit stop time relay KT2, so as to realize automatic temperature regulation.
The automatic operation action program of the temperature adjusting device is as follows: when the environmental temperature is higher than the upper limit of the temperature control relay KTE (the temperature is set to be 30 ℃ for starting), a temperature control relay KTE contact 7 is communicated with a temperature control contact 6, and a control power supply A passes through a contact 4 and a contact 6 which are closed by three intermediate relays 3KM, 4KM and 5KM, and a switching intermediate relay KM contact 1 and a contact 9 to start a time relay KT 1; and simultaneously switching the contact 2 of the intermediate relay KM and the contact 10 to start the intermediate relay 1KM of the fan, closing the normally open contacts 3 and 5 and the normally open contacts 4 and 6 of the 1KM, respectively starting the main contactor KM1 of the 1# line circuit and the main contactor KM2 of the 2# line circuit, and simultaneously operating the two fans. At the moment, the time-limited starting fan time relay KT1 operates to a preset action time limit (such as 60 minutes), the time-limited starting time relay KT1 acts, the time-limited starting time relay KT1 is closed at the contact 6 and the contact 8, the switching intermediate relay KM is started, and the contact 8 and the contact 12 of the switching intermediate relay KM are closed to realize self-holding of the switching intermediate relay KM. After the switching intermediate relay KM is started, a first group of normally closed contacts 1 and 9 of the switching intermediate relay KM are disconnected, the time relay KT1 is powered off and stops running, a second group of normally closed contacts 2 and 10 of the switching intermediate relay KM are disconnected, a starting intermediate relay 1KM coil of a starting fan is powered off, two pairs of normally open contacts, namely a contact 3 and a contact 5, a contact 4 and a contact 6 of the starting intermediate relay 1KM of the starting fan are disconnected with a line main contactor KM1 and a line main contactor KM2 respectively, and the two fans are all stopped. Meanwhile, a contact 7 and a contact 11 of a switching intermediate relay KM are closed, a time relay KT2 is electrified to operate, the time relay KT2 acts after a certain time limit (for example, setting is carried out for 20 minutes), the contact 1 and the contact 4 of the time relay KT2 are disconnected, the switching intermediate relay KM is electrified and stops operating, the normally closed contacts of the contact 1 and the contact 9 of the switching intermediate relay KM are closed, the time-limited starting fan time relay KT1 is started again, the normally closed contacts of the contact 2 and the contact 10 of the KM are closed, a coil of a starting intermediate relay 1KM for starting a fan is electrified and started, the contact 3 and the contact 5 of the 1KM are closed, the contact 4 and the contact. And the initial state is recovered and repeated in cycles, and the function of automatically adjusting the temperature is realized.
When the environmental temperature is lower than the setting value by 25 ℃, the temperature control relay KTE contact 7 is communicated with the low temperature contact 8, the low temperature fan stops the action of the intermediate relay 2KM, and the fan automatically stops running.
The 1# line automatically runs the action process: when the switch SA1 is operated to be in an automatic operation position, the contacts 3 and 8 of the switch SA1 are switched on, the contact 8 of the switch SA1 is connected with the normally open contact 3 of the starting intermediate relay 1KM for starting the power equipment on the line, the normally open contact 5 of the starting intermediate relay 1KM for starting the power equipment on the line is connected with the contact 4 of the starting button SB1, and the 1# line main contactor can be electrically operated as long as the normally open contacts 3 and 5 of the starting intermediate relay 1KM are closed. When the environmental temperature is lower than the lower limit setting value of the temperature control relay KTE, the temperature control contacts 7 and 8 are connected to stop the intermediate relay 2KM of the power equipment on the line, after the intermediate relay 2KM is stopped, normally closed contacts 1 and 5 of the intermediate relay 2KM are stopped to be disconnected, and the 1# line main contactor KM1 stops working.
The 2# line automatically runs the action process: when the switch SA2 is operated to be in an automatic operation position, the contacts 3 and 8 of the switch SA2 are switched on, the contact 8 of the switch SA2 is connected with the normally open contact 4 of the starting intermediate relay 1KM for starting the power equipment on the line, the normally open contact 6 of the starting intermediate relay 1KM for starting the power equipment on the line is connected with the contact 4 of the starting button SB3, and the 2# line main contactor KM2 can be electrically operated as long as the normally open contacts 4 and 6 of the starting intermediate relay 1KM are closed. When the environmental temperature is lower than the lower limit setting value of the temperature control relay KTE, the temperature control contacts 7 and 8 are connected to stop the intermediate relay 2KM of the power equipment on the line, after the intermediate relay 2KM is stopped, the normally closed contacts 2 and 6 of the intermediate relay 2KM are stopped to be disconnected, and the 2# line main contactor KM2 stops working.
The open-phase protection unit comprises three miniature intermediate relays 3KM, 4KM and 5KM which are respectively connected with a three-phase power supply, the three miniature intermediate relays 3KM, 4KM and 5KM are connected with a three-phase power supply through an air switch QF, the normally open contacts 4 and 6 of the three micro intermediate relays form an AND gate circuit access control loop which is connected with the input ends of the change-over switches SA1 and SA2 to monitor whether the three-phase power supply is in phase failure or not so as to protect the normal operation of the temperature regulating motor, the phase-lack alarm circuit comprises an acousto-optic alarm system which is respectively connected with three miniature intermediate relays 3KM, 4KM and 5KM of the phase-lack unit and is connected with a background computer, when any phase power supply circuit is in phase-lack, the buzzer in the fault alarm loop can give out buzzing sound, and the display connected with the fault alarm loop displays that a certain phase of power supply is in phase failure.
The utility model provides a attemperator still includes the indicating unit, the indicating unit include the pilot lamp, the pilot lamp includes the operation pilot lamp and stops the pilot lamp, every the circuit owner contactor of circuit selection control circuit be connected with an operation pilot lamp and a stop the pilot lamp respectively, be 4HR, 1HG, 5HR, 2HG respectively, the circuit owner contactor KM1 of 4HR and 1# circuit be connected and realize 1# circuit fan operation instruction, the circuit owner contactor KM1 of 1HG and 1# circuit be connected and realize 1# circuit fan and stop the instruction, the circuit owner contactor KM2 of 5HR and 2# circuit be connected and realize 2# circuit fan operation instruction, the circuit owner contactor KM2 of 2HG and 2# circuit be connected and realize 2# circuit fan and stop the instruction.
The air switch QF with the short circuit overload function is arranged at the input end of the three-phase power supply, so that the normal operation of the three-phase motor is effectively guaranteed.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (5)
1. An economical and practical three-phase electric power temperature adjusting device is suitable for a temperature control device for adjusting the temperature by three-phase electric power, and is characterized by comprising a temperature setting loop connected with the three-phase electric power, and a line selection control loop, a high temperature control loop and a low temperature control loop which are connected in parallel and used for selecting a plurality of electric power equipment lines, wherein the plurality of electric power equipment line selection control loops, the high temperature control loop and the low temperature control loop are respectively connected with a phase-lacking protection unit in series, and the phase-lacking protection unit is connected with a three-phase power supply;
the temperature setting circuit comprises a temperature control relay KTE which is connected with the three-phase power and used for setting a temperature regulation range, and the temperature control relay KTE comprises a high temperature contact and a low temperature contact;
each line selection control loop comprises a selector switch for switching between manual operation and automatic operation, a line main contactor and a starting intermediate relay for starting the power equipment on the line, wherein a coil of the line main contactor is connected in series on the line selection control loop, a manual operation contact of the selector switch is connected with one end of a coil of the line main contactor, the other end of the coil of the main contactor is connected with a normally closed contact of the stopping intermediate relay for stopping the power equipment on the line, an automatic operation contact of the selector switch is connected with a normally open contact of the starting intermediate relay for starting the power equipment on the line, and the line main contactor is connected with the starting intermediate relay for starting the power equipment on the line and then connected with the normally closed contact of the stopping intermediate relay for stopping the power equipment on the line;
the high-temperature control loop comprises a switching intermediate relay connected with a temperature control relay KTE high-temperature contact, an alternating current contactor for controlling power equipment on a circuit, a time-limited starting time relay and a time-limited stopping time relay, wherein the switching intermediate relay comprises four groups of contacts which are respectively two groups of normally open contacts and two groups of normally closed contacts, one group of normally closed contacts of the switching intermediate relay is connected with the starting intermediate relay for starting the power equipment on the circuit in series, after the starting intermediate relay for the power equipment on the circuit acts, the two groups of normally open contacts are respectively connected with the alternating current contactor for controlling the power equipment on the circuit corresponding to the normally open contacts, the other group of normally closed contacts of the switching intermediate relay is connected with the time-limited starting time relay in series, one group of normally open contacts of the switching intermediate relay is connected with the time-limited stopping time, after the other group of normally open contacts of the switching intermediate relay is connected in parallel with the normally open contacts of the time-limited starting time relay, the normally open contacts are connected with a coil of the switching intermediate relay and are also connected with the normally closed contacts of the time-limited stopping time relay, so that the switching of the switching intermediate relay is realized according to a set program;
and the low-temperature contact of the temperature control relay KTE is connected with a coil of a stopping intermediate relay for stopping the power equipment.
2. The economical and practical three-phase electric power temperature adjusting device according to claim 1, wherein the open-phase protection unit comprises three micro intermediate relays respectively connected with a three-phase power supply at will, the three micro intermediate relays are connected with the three-phase power supply through air switches, and normally open contacts of the three micro intermediate relays form an AND gate loop to be connected with a main circuit selection control loop and an input end of a change-over switch.
3. An economical and practical three-phase electric power temperature regulating device according to claim 1, characterized in that the line selection control loop further comprises a start button connected with the line main contactor, a stop button connected in series with the line main contactor, and a normally open contact of a start intermediate relay for starting the power equipment on the line is connected in parallel with the start button contact.
4. The economical and practical three-phase electric power temperature adjusting device according to claim 2, characterized by further comprising a phase-failure alarm circuit, wherein the phase-failure alarm circuit comprises three miniature intermediate relays connected with the phase-failure protection unit and the audible and visual alarm device of the background system respectively, when any one phase of power supply circuit is out of phase, a buzzer in the fault alarm circuit can give out a buzzer, and a display connected with the fault alarm circuit displays that a certain phase of power supply is out of phase.
5. The economical and practical three-phase electric power temperature adjusting device according to claim 1, further comprising an indicating unit, wherein the indicating unit comprises an indicating lamp, the indicating lamp comprises an operation indicating lamp and a stop indicating lamp, and the main line contactor of each line selection control loop is respectively connected with the operation indicating lamp and the stop indicating lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922328369.6U CN210806728U (en) | 2019-12-23 | 2019-12-23 | Economical and practical three-phase electric power temperature adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922328369.6U CN210806728U (en) | 2019-12-23 | 2019-12-23 | Economical and practical three-phase electric power temperature adjusting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210806728U true CN210806728U (en) | 2020-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922328369.6U Active CN210806728U (en) | 2019-12-23 | 2019-12-23 | Economical and practical three-phase electric power temperature adjusting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210806728U (en) |
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2019
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