CN213713436U - Combined type air conditioner coil water anti-freezing control device - Google Patents
Combined type air conditioner coil water anti-freezing control device Download PDFInfo
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- CN213713436U CN213713436U CN202022909656.9U CN202022909656U CN213713436U CN 213713436 U CN213713436 U CN 213713436U CN 202022909656 U CN202022909656 U CN 202022909656U CN 213713436 U CN213713436 U CN 213713436U
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Abstract
The utility model relates to a combined type air conditioner coil water anti-freezing control device, belonging to the field of air conditioning technology, comprising a water return pipe communicated with a surface cooler, wherein the water return pipe is provided with a check valve, the inlet of the check valve is close to the water outlet of the surface cooler, the position of the water return pipe close to the inlet of the check valve is communicated with a drain pipe, and the drain pipe is provided with an electromagnetic valve; the anti-freezing control device further comprises a controller, a first detection device, a driving circuit and a second detection device. Compared with the prior art, this application has the effect of improving the problem that the surface cooler breaks down because of the water coil freezes.
Description
Technical Field
The application relates to the field of air conditioning technology, in particular to a combined type air conditioning coil water anti-freezing control device.
Background
The combined air conditioner set is one kind of air treating apparatus comprising various air treating functional sections and is suitable for air conditioning system with resistance over 100 Pa. The air conditioning unit has air mixing, flow equalizing, filtering, cooling, primary and secondary heating, dehumidifying, humidifying, blower returning, water spraying, silencing, heat recovering and other units.
In a water system of a combined air conditioning unit, a water coil is generally divided into a cold water coil and a hot water coil, and water is circularly supplied to a surface air cooler through the cold water coil and the hot water coil. The cold water coil pipe conveys water at a lower temperature, and the hot water coil pipe conveys water at a higher temperature. The combined air conditioning unit can be used in a large amount in winter, but the temperature in winter is lower, and when the ambient temperature is lower than 0 ℃, the water coil pipe can be frozen to cause the failure of the surface air cooler.
SUMMERY OF THE UTILITY MODEL
In order to improve the problem that the surface cooler breaks down because of the water coil pipe freezes and breaks down the trouble, this application provides a modular air conditioner coil pipe water freeze control device.
The application provides a modular air conditioner coil pipe water freeze-proof controlling means adopts following technical scheme:
a combined type air conditioner coil water anti-freezing control device comprises a water return pipe communicated with a surface cooler, wherein a check valve is arranged on the water return pipe, an inlet of the check valve is close to a water outlet of the surface cooler, a drain pipe is communicated with a position, close to the inlet of the check valve, on the water return pipe, and an electromagnetic valve is arranged on the drain pipe;
the anti-freezing control device further comprises a controller, a first detection device, a driving circuit and a second detection device; wherein the content of the first and second substances,
the first detection device is used for detecting whether the surface cooler is started or shut down or not and sending a detection signal to the controller;
the second detection device is used for detecting the temperature information of the environment around the surface cooler and sending the temperature information to the controller;
the anode of the electromagnetic valve is connected with the anode of the first power supply, and the cathode of the electromagnetic valve is connected with the voltage input end of the driving circuit;
the control signal input end of the driving circuit is connected with the control signal output end of the controller;
the controller responds to the received detection information and temperature information and sends a control signal to the drive circuit.
By adopting the technical scheme, the check valve can prevent water in the return water pipe from flowing back to the surface cooler to a certain extent, the controller can send a control signal to the driving circuit according to the start/shut-off and temperature information of the surface cooler detected by the first detection device when the temperature is lower than a certain value and the surface cooler is shut down, the driving circuit works to drive the electromagnetic valve to open the drain pipe, and the water in the return water pipe is discharged, otherwise, when the surface cooler starts to work, the controller controls the driving circuit to stop working, the electromagnetic valve is closed, the surface cooler starts to work, so that when the temperature is lower, the water in the return water pipe can be prevented from flowing back to freeze the surface cooler/water coil pipe to a certain extent, and the problem that the surface cooler fails due to the freeze of the water coil pipe can be solved.
Optionally, the driving circuit includes a first resistor R1, a first NPN transistor Q1, and a second NPN transistor Q2; wherein the content of the first and second substances,
one end of the first resistor R1 is used for being connected with the anode of the second power supply, and the other end of the first resistor R1 is respectively connected with the collector of the first NPN triode Q1 and the base of the second NPN triode Q2;
the base of the first NPN triode Q1 is connected with the control signal input end of the driving circuit, and the emitter is connected with the grounding end;
and a collector of the second NPN triode Q2 is connected with a voltage input end of the driving circuit, and an emitter of the second NPN triode Q2 is connected with a grounding end.
By adopting the technical scheme, when the controller sends a high level to the control signal input end of the driving circuit, the base of the first NPN triode Q1 is at the high level, the first NPN triode Q1 is conducted, and at the moment, the base of the second NPN triode Q2 is at the high level, namely, the second NPN triode Q2 is conducted, so that the driving circuit works, and the electromagnetic valve is driven to work conveniently.
Optionally, the first detection device includes a first detection circuit, a current input end of the first detection circuit is used for being connected with a power supply interface of the surface cooler, and a detection signal output end of the first detection circuit is connected with a detection signal input end of the controller.
Through adopting above-mentioned technical scheme, first detection circuitry can detect the start/shutdown information of surface cooler to send the detection information for the controller, thereby realize detecting the effect of surface cooler start/shutdown signal.
Optionally, the first detection circuit includes a second resistor R2, a third resistor R3, and a third NPN triode Q3; wherein the content of the first and second substances,
one end of the second resistor R2 is connected with the current input end of the detection circuit, and the other end of the second resistor R2 is connected with the base electrode of the third NPN triode Q3;
one end of the third resistor R3 is used for being connected with the positive electrode of the second power supply, and the other end of the third resistor R3 is connected with the collector electrode of the third NPN triode Q3;
and an emitter of the third NPN triode Q3 is connected to the ground terminal and the detection signal output terminal OUT of the first detection circuit, respectively.
By adopting the technical scheme, when the surface air cooler is started, the power interface is electrified, the base electrode of the third NPN triode Q3 is at a high level, the third NPN triode Q3 is conducted, and the first detection circuit is conducted therewith, so that the first detection circuit transmits a voltage signal to the controller from the detection signal output end OUT, otherwise, no voltage signal exists, and the startup/shutdown state of the surface air cooler is convenient to detect.
Optionally, the second detection device includes a second detection circuit for detecting the ambient temperature of the surface cooler, and a temperature information output end of the second detection circuit is connected to a temperature information input end of the controller.
Through adopting above-mentioned technical scheme, after second detection circuitry detected surface cooler ambient temperature, sent temperature information for the controller to realize temperature detection's effect.
Optionally, the second detection circuit comprises a fourth resistor R4 and a thermistor R5; wherein the content of the first and second substances,
one end of the fourth resistor R4 is used for being connected with the anode of the second power supply, and the other end of the fourth resistor R4 is connected with one end of the thermistor R5 and the temperature information output end EPT of the second detection circuit;
the thermistor R5 has the other end connected to the ground.
Through adopting above-mentioned technical scheme, thermistor's resistance can be for changing along with ambient temperature's change to the current of second detection circuitry produces corresponding change, makes the change that can come perception surface cooler ambient temperature according to the change of current, is convenient for detect the temperature of surface cooler ambient environment.
Optionally, the second detection device includes a temperature sensor.
Through adopting above-mentioned technical scheme, can detect the temperature information of surface cooler surrounding environment fast with the help of temperature sensor to realize the effect that the temperature detected.
Optionally, one end of the water return pipe close to the surface cooler is communicated with a metal soft joint, and the water return pipe is connected with the surface cooler through the metal soft joint.
Through adopting above-mentioned technical scheme, the soft joint of metal can absorb partial vibration energy, reduces the vibration range of wet return to can avoid to a certain extent that the connection between wet return and the surface cooler appears becoming flexible and leaking.
In summary, the present application includes at least one of the following beneficial technical effects:
the application provides a modular air conditioner coil pipe water freeze-proof controlling means, through the combined action of check valve, drain pipe, solenoid valve, drive circuit, first detection circuit, second detection circuit and controller, can avoid the water backward flow in the return pipe to a certain extent to freeze surface cooler/water coil pipe, and then can improve the surface cooler because of the problem that the water coil pipe freezes to break down and the operational failure appears.
Drawings
Fig. 1 is a schematic structural diagram of a combined type air conditioner coil water anti-freezing control device according to an embodiment of the application.
Fig. 2 is a control block diagram of a combined type air conditioner coil water anti-freezing control device according to an embodiment of the application.
Fig. 3 is a first circuit diagram of a water anti-freezing control device for a combined air conditioner coil according to an embodiment of the present application.
Fig. 4 is a second circuit diagram of a water anti-freezing control device for a combined air conditioner coil according to an embodiment of the present application.
Fig. 5 is a third circuit diagram of a combined type air conditioner coil water anti-freezing control device according to an embodiment of the application.
Description of reference numerals: 1. a surface cooler; 2. a water supply pipe; 21. a branch pipe; 22. an electric two-way regulating valve; 23. a stop valve; 3. a water return pipe; 4. a drain pipe; 5. a check valve; 6. an electromagnetic valve; 7. a metal soft joint; 8. a temperature sensor; 101. a controller; 102. a first detection circuit; 103. a second detection circuit; 104. a drive circuit.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
In an air conditioning system, two water coil pipes are generally communicated with a surface cooler 1, one water coil pipe is used for supplying water to the surface cooler 1, the other water coil pipe is used for discharging water circulated by the surface cooler 1, the water coil pipe for supplying water is also called a water supply pipe 2, and the water coil pipe for discharging water is also called a water return pipe 3. An electric two-way regulating valve 22 is fixed to the water supply pipe 2 by screwing or the like so as to regulate the amount of water supplied to the surface cooler 1. In order to facilitate the maintenance of the electric two-way regulating valve 22, the branch pipes 21 are generally communicated with the two sides of the electric two-way regulating valve 22 on the water supply pipe 2, the stop valves 23 are respectively installed on the branch pipes 21 and the water supply pipe 2 between the two ends of the branch pipes 21 and the electric two-way regulating valve 22, and the stop valves 23 can be fixed by welding, screwing, or the like.
The embodiment of the application discloses modular air conditioner coil water freeze-proof control device. Referring to fig. 1 and 2, the water anti-freezing control device for the combined air conditioner coil comprises a water return pipe 3 communicated with a surface air cooler 1, a check valve 5 is fixedly mounted on the water return pipe 3, an inlet of the check valve 5 is close to a water outlet of the surface air cooler 1, and the check valve 5 can be fixed in a threaded connection mode and the like. On the wet return 3 and be close to the position department intercommunication of check valve 5 import have drain pipe 4, and drain pipe 4 is located between 1 delivery port of surface cooler and the 5 imports of check valve promptly, installs solenoid valve 6 on the drain pipe 4. Wherein, the drain pipe 4 and the electromagnetic valve 6 can be fixed by screw connection and other modes. The anti-freezing control device further comprises a controller 101, a first detection device, a driving circuit 104 and a second detection device; wherein the content of the first and second substances,
the first detection device is used for detecting whether the surface cooler 1 is started or shut down and sending a detection signal to the controller 101;
the second detection device is used for detecting the temperature information of the environment around the surface cooler 1 and sending the temperature information to the controller 101;
an electromagnetic valve 6, the anode of which is used for being connected with the anode of the first power supply, and the cathode of which is connected with the voltage input end of the driving circuit 104;
a control signal input end of the driving circuit 104 is connected with a control signal output end of the controller 101;
the controller 101 responds to the received detection information and temperature information and sends a control signal to the drive circuit 104.
In addition, in this embodiment, the MCU is used as the controller 101, and in other embodiments, the single chip or the PLC controller 101 may be used as the controller 101.
In the above embodiment of the water anti-freezing control device for the coil of the combined air conditioner, the check valve 5 can prevent the water in the water return pipe 3 from flowing back into the surface air cooler 1 to some extent, the MCU controller 101 controls the water supply unit according to the start/shut-off and temperature information of the surface air cooler 1 detected by the first detecting device, when the temperature is lower than a certain value and the surface air cooler 1 is shut down, a control signal is sent to the driving circuit 104, the driving circuit 104 works to drive the electromagnetic valve 6 to open the water discharge pipe 4 and discharge the water in the water return pipe 3, otherwise, when the surface air cooler 1 starts to work, the MCU controller 101 controls the driving circuit 104 to stop working, the electromagnetic valve 6 is closed, the surface air cooler 1 starts to work, the water return pipe is provided with a water return pipe 3, so that when the temperature is lower, the water return pipe can be prevented from returning water to a certain extent to freeze the surface cooler 1/water coil pipe, and the problem that the surface cooler 1 has a working fault due to the frozen water coil pipe can be solved.
Referring to fig. 1, in order to reduce the vibration amplitude of the return pipe 3 to prevent the connection between the return pipe 3 and the surface cooler 1 from being loosened and leaking water to some extent. One end of the water return pipe 3 close to the surface cooler 1 is communicated with a metal soft joint 7, and the water return pipe 3 is connected with the surface cooler 1 through the metal soft joint 7.
Referring to fig. 2 and 3, as an embodiment of the driving circuit 104, the driving circuit 104 includes a first resistor R1, a first NPN transistor Q1, and a second NPN transistor Q2; wherein the content of the first and second substances,
a first resistor R1, one end of which is connected to the positive electrode of the second power supply, and the other end of which is connected to the collector of the first NPN transistor Q1 and the base of the second NPN transistor Q2, respectively;
a first NPN triode Q1 having a base connected to the control signal input terminal of the driving circuit 104 and an emitter connected to the ground terminal;
a collector of the second NPN transistor Q2 is connected to the voltage input terminal of the driving circuit 104, and an emitter thereof is connected to the ground terminal.
In the above embodiment of the driving circuit 104, when the MCU controller 101 sends a high level to the control signal input terminal of the driving circuit 104, the base of the first NPN transistor Q1 is at a high level, the first NPN transistor Q1 is turned on, and at this time, the base of the second NPN transistor Q2 is at a high level, that is, the second NPN transistor Q2 is turned on, so that the driving circuit 104 operates, so as to drive the electromagnetic valve 6 to operate.
Referring to fig. 2, as an embodiment of the first detection device, the first detection device includes a first detection circuit 102, a current input terminal of the first detection circuit 102 is configured to be connected to the power interface of the surface cooler 1, and a detection signal output terminal of the first detection circuit 102 is connected to a detection signal input terminal of the MCU controller 101. The first detection circuit 102 can detect the start/shut-off of the surface cooler 1 according to the presence or absence of the power supply interface electricity of the surface cooler 1.
Referring to fig. 2 and 4, as an embodiment of the first sensing circuit 102, the first sensing circuit 102 includes a second resistor R2, a third resistor R3, and a third NPN transistor Q3; wherein the content of the first and second substances,
one end of the second resistor R2 is connected with the current input end of the detection circuit, and the other end of the second resistor R2 is connected with the base electrode of the third NPN triode Q3;
a third resistor R3, one end of which is connected to the positive terminal of the second power supply and the other end of which is connected to the collector of the third NPN transistor Q3;
an emitter of the third NPN transistor Q3 is connected to the ground terminal and the detection signal output terminal OUT of the first detection circuit 102, respectively.
In the above embodiment of the first detection circuit 102, when the surface air cooler 1 is started, the power interface is powered, the base of the third NPN transistor Q3 is at a high level, the third NPN transistor Q3 is turned on, and the first detection circuit 102 is turned on accordingly, so that the first detection circuit 102 transmits a voltage signal to the controller 101 from the detection signal output terminal OUT, otherwise, there is no voltage signal, thereby facilitating detection of the start/shut state of the surface air cooler 1.
Referring to fig. 2 and 5, as an embodiment of the second detection device, the second detection device includes a second detection circuit 103 for detecting the ambient temperature around the surface cooler 1, and a temperature information output terminal of the second detection circuit 103 is connected to a temperature information input terminal of the controller 101.
Referring to fig. 5, as an embodiment of the second detection circuit 103, the second detection circuit 103 includes a fourth resistor R4 and a thermistor R5; wherein the content of the first and second substances,
a fourth resistor R4 having one end for connection with the positive electrode of the second power supply and the other end connected to one end of the thermistor R5 and the temperature information output end EPT of the second detection circuit 103;
the thermistor R5 has the other end connected to the ground.
The thermistor R5 may be a positive temperature coefficient thermistor or a negative temperature coefficient thermistor.
In the above embodiment of the second detection circuit 103, the resistance of the thermistor R4 changes with the change of the ambient temperature, so that the current of the second detection circuit 103 changes accordingly, and the change of the ambient temperature of the surface air cooler 1 can be detected according to the change of the current, thereby facilitating the detection of the ambient temperature of the surface air cooler 1.
Referring to fig. 1, as another embodiment of the second detection device, the second detection device includes a temperature sensor 8, the temperature sensor 8 may be fixed to the surface cooler 1 or the water return pipe 3 by means of a bolt connection or the like, and a signal output terminal of the temperature sensor 8 is connected to one input terminal of the MCU controller 101.
The implementation principle of the water anti-freezing control device for the coil pipe of the combined air conditioner is as follows: the first detection circuit 102 detects whether the surface cooler 1 is started/shut down and sends a detection signal to the controller 101, and the second detection circuit 103 detects the ambient temperature around the surface cooler 1 and sends temperature information to the controller 101. When the surface air cooler 1 is turned off and the ambient temperature of the surface air cooler 1 is low (lower than a preset threshold), the controller 101 sends a control signal to the driving circuit 104, and the driving circuit 104 operates to drive the electromagnetic valve 6 to operate, so that the water in the water return pipe 3 can be discharged from the water discharge pipe 4.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a modular air conditioner coil water freeze-proof controlling means, includes wet return (3) with surface cooler (1) intercommunication, its characterized in that: a check valve (5) is arranged on the water return pipe (3), the inlet of the check valve (5) is close to the water outlet of the surface cooler (1), a drain pipe (4) is communicated with the position, close to the inlet of the check valve (5), on the water return pipe (3), and an electromagnetic valve (6) is arranged on the drain pipe (4);
the anti-freezing control device further comprises a controller (101), a first detection device, a driving circuit (104) and a second detection device; wherein the content of the first and second substances,
the first detection device is used for detecting whether the surface cooler (1) is started or shut down or not and sending a detection signal to the controller (101);
the second detection device is used for detecting the temperature information of the surrounding environment of the surface cooler (1) and sending the temperature information to the controller (101);
the anode of the electromagnetic valve (6) is connected with the anode of a first power supply, and the cathode of the electromagnetic valve is connected with the voltage input end of the driving circuit (104);
the control signal input end of the driving circuit (104) is connected with the control signal output end of the controller (101);
the controller (101) is responsive to the received detection information and temperature information and sends a control signal to the drive circuit (104).
2. The combined air conditioner coil water anti-freezing control device as claimed in claim 1, wherein: the drive circuit (104) comprises a first resistor R1, a first NPN transistor Q1 and a second NPN transistor Q2; wherein the content of the first and second substances,
one end of the first resistor R1 is used for being connected with the anode of the second power supply, and the other end of the first resistor R1 is respectively connected with the collector of the first NPN triode Q1 and the base of the second NPN triode Q2;
the base of the first NPN triode Q1 is connected with the control signal input end of the driving circuit (104), and the emitter is connected with the grounding end;
and the collector of the second NPN triode Q2 is connected with the voltage input end of the driving circuit (104), and the emitter of the second NPN triode Q2 is connected with the grounding end.
3. The combined air conditioner coil water anti-freezing control device as claimed in claim 1, wherein: the first detection device comprises a first detection circuit (102), a current input end of the first detection circuit (102) is used for being connected with a power interface of the surface cooler (1), and a detection signal output end of the first detection circuit (102) is connected with a detection signal input end of the controller (101).
4. The combined air conditioner coil water anti-freezing control device as claimed in claim 3, wherein: the first detection circuit (102) comprises a second resistor R2, a third resistor R3 and a third NPN triode Q3; wherein the content of the first and second substances,
one end of the second resistor R2 is connected with the current input end of the detection circuit, and the other end of the second resistor R2 is connected with the base electrode of the third NPN triode Q3;
one end of the third resistor R3 is used for being connected with the positive electrode of the second power supply, and the other end of the third resistor R3 is connected with the collector electrode of the third NPN triode Q3;
and the emitter of the third NPN triode Q3 is respectively connected with the ground terminal and the detection signal output terminal OUT of the first detection circuit (102).
5. The combined air conditioner coil water anti-freezing control device as claimed in claim 1, wherein: the second detection device comprises a second detection circuit (103) for detecting the ambient temperature of the surface cooler (1), and the temperature information output end of the second detection circuit (103) is connected with the temperature information input end of the controller (101).
6. The combined air conditioner coil water anti-freezing control device as claimed in claim 5, wherein: the second detection circuit (103) includes a fourth resistor R4 and a thermistor R5; wherein the content of the first and second substances,
one end of the fourth resistor R4 is used for being connected with the anode of the second power supply, and the other end of the fourth resistor R4 is connected with one end of the thermistor R5 and the temperature information output end EPT of the second detection circuit (103);
the thermistor R5 has the other end connected to the ground.
7. The combined air conditioner coil water anti-freezing control device as claimed in claim 1, wherein: the second detection means comprise a temperature sensor (8).
8. The combined air conditioner coil water anti-freezing control device as claimed in claim 1, wherein: one end of the water return pipe (3) close to the surface air cooler (1) is communicated with a metal soft joint (7), and the water return pipe (3) is connected with the surface air cooler (1) through the metal soft joint (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022909656.9U CN213713436U (en) | 2020-12-05 | 2020-12-05 | Combined type air conditioner coil water anti-freezing control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022909656.9U CN213713436U (en) | 2020-12-05 | 2020-12-05 | Combined type air conditioner coil water anti-freezing control device |
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| Publication Number | Publication Date |
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| CN213713436U true CN213713436U (en) | 2021-07-16 |
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| CN202022909656.9U Active CN213713436U (en) | 2020-12-05 | 2020-12-05 | Combined type air conditioner coil water anti-freezing control device |
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| CN (1) | CN213713436U (en) |
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