Temperature controller of cooling-water machine

Abstract

The temperature controller comprises a control panel and a display screen, the control panel is connected with the display screen, the control panel comprises a control module, a detection module, a signal input module, a power module, an alarm module, a heater, a compressor, a refrigeration module and a heating module, and the power module is used for supplying power; the detection module comprises a room temperature probe, a water temperature probe, a flow input interface and a 485 communication interface; the signal input module comprises an external input signal line and an analog quantity input signal line; the detection module detects temperature and flow signals and sends the signals to the control module, the signal input module receives external signals and sends the external signals to the control module, and the control module correspondingly sends adjusting control signals to the refrigeration module, the heating module and the alarm module so as to adjust the temperature and give an alarm. The water temperature of the water cooler can be automatically adjusted and controlled according to the environment temperature, alarming is achieved, the structure is simple, adjusting precision is high, and user requirements can be met.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of temperature control technology, and in particular to a chiller temperature controller. Background Art

[0002] At present, a chiller is a cooling water device that can provide constant temperature, constant flow and constant pressure. A certain amount of water is injected into the water tank in the machine in advance, and the water is cooled by the chiller refrigeration system. Then the low-temperature cooling water is sent to the equipment to be cooled by the water pump. The chiller takes away the heat and the temperature rises before returning to the water tank to achieve the cooling effect. Chillers are divided into air-cooled chillers and water-cooled chillers in the industry. At present, traditional water chillers cannot realize automatic adjustment and control according to the ambient temperature, and the automation level is low, which cannot meet user needs. Utility Model Content

[0003] The embodiment of the present application provides a water chiller temperature controller to solve the problem that the existing water chiller cannot realize automatic adjustment and control according to the ambient temperature, has a low automation level, and cannot meet the needs of users.

[0004] In a first aspect, an embodiment of the present application provides a chiller temperature controller, comprising a control panel and a display screen, wherein the control panel is connected to the display screen, and the control panel comprises a control module, a detection module, a signal input module, a power module, an alarm module, a heater, a compressor, a refrigeration module and a heating module, wherein the power module is used to supply power, and the control module is connected to the detection module, the signal input module, the power module, the alarm module, the heater, the compressor, the refrigeration module and the heating module; the detection module comprises a room temperature probe, a water temperature probe, a flow input interface and a 485 communication interface; the signal input module comprises an external input signal line and an analog input signal line; the detection module is used to detect temperature and flow signals and send them to the control module, and the control module correspondingly sends adjustment control signals to the refrigeration module, the heating module and the alarm module to adjust the temperature and alarm, and the signal input module is used to receive external signals and send them to the control module, and the control module correspondingly controls the refrigeration module, the heating module and the alarm module to adjust the temperature and alarm.

[0005] In some embodiments, the cooling module includes a cooling solenoid valve and a cooling switch, and the cooling switch connects the control module and the cooling solenoid valve; the heating module includes a heating solenoid valve and a heating switch, and the heating switch connects the control module and the heating solenoid valve.

[0006] In some embodiments, the alarm module includes a buzzer, a relay, an alarm input terminal, an alarm normally open terminal, and an alarm normally closed terminal.

[0007] In some embodiments, the detection module further includes a water level switch signal interface, and the water level switch signal interface is connected to the control module.

[0008] In some embodiments, the room temperature probe and the water temperature probe are both provided with a temperature sensor and a temperature sensor input detection circuit, the temperature sensor input detection circuit comprises a first resistor, a second resistor, a first capacitor and a second capacitor, the first end of the first resistor is connected to the temperature sensor, the second end of the first resistor is connected to the first end of the first capacitor, the first end of the second capacitor and the first end of the second resistor, the second end of the first capacitor is connected to the power supply end, the second end of the second capacitor is connected to the ground end, and the second end of the second resistor is connected to the control module.

[0009] In some embodiments, the flow input interface includes a flow sensor and a flow sensor input detection circuit, the flow sensor input detection circuit includes the third resistor, the fourth resistor and the third capacitor, the first end of the third resistor is connected to the flow sensor, the second end of the third resistor is connected to the first end of the fourth resistor, the first end of the third capacitor and the control module, the second end of the fourth resistor is connected to the power supply end, and the second end of the third capacitor is connected to the ground end.

[0010] In some embodiments, the control module includes a main control IC circuit, which includes a main control IC chip, a first crystal oscillator, a fourth capacitor, a fifth capacitor, a sixth capacitor, a first electrolytic capacitor and a second electrolytic capacitor. The twentieth pin of the main control IC chip is connected to the first end of the sixth capacitor, the first end of the first electrolytic capacitor, the first end of the second electrolytic capacitor and the ground terminal, the twenty-first pin is connected to the second end of the sixth capacitor, the second end of the first electrolytic capacitor, the second end of the second electrolytic capacitor and the power supply terminal, the twenty-third pin is connected to the first end of the first crystal oscillator and the first end of the fifth capacitor, the twenty-fourth pin is connected to the second end of the first crystal oscillator and the first end of the fourth capacitor, and the second end of the fourth capacitor and the second end of the fifth capacitor are connected to the power supply terminal.

[0011] In some embodiments, the external input signal line includes an external signal input detection circuit, which includes a fifth resistor, a sixth resistor, a seventh capacitor and an eighth capacitor. The first end of the fifth resistor is connected to the signal input end, the second end of the fifth resistor is connected to the first end of the seventh capacitor, the first end of the eighth capacitor, the first end of the sixth resistor and the control module, the second end of the seventh capacitor is connected to the ground end, and the second end of the eighth capacitor is connected to the second end of the sixth resistor and the ground end.

[0012] In some embodiments, the display screen includes a display driving circuit, a driving digital tube and an indicator light, and the display driving circuit is connected to the driving digital tube and the indicator light.

[0013] In some embodiments, the display driving circuit includes a display driving chip, a seventh resistor, an eighth resistor, a ninth resistor, a ninth capacitor, a third electrolytic capacitor and a fourth electrolytic capacitor. The second pin of the display driving chip is connected to the first end of the ninth resistor, the third pin is connected to the first end of the eighth resistor, the fourth pin is connected to the first end of the seventh resistor, the eighth pin to the fourteenth pin are connected to the indicator light, the eighteenth pin to the twentieth pin are connected to the driving digital tube, the twenty-fourth pin, the twenty-sixth pin and the twenty-seventh pin are connected to the driving digital tube, the twenty-second pin is connected to the twenty-fifth pin, the twenty-eighth pin, the first end of the ninth capacitor, the first end of the third electrolytic capacitor and the first end of the fourth electrolytic capacitor, the second end of the ninth capacitor, the second end of the third electrolytic capacitor, the second end of the fourth electrolytic capacitor, the second end of the seventh resistor, the second end of the eighth resistor and the second end of the ninth resistor are connected to the power supply end.

[0014] The embodiment of the present application detects temperature and flow signals through a detection module and sends them to a control module. The signal input module receives external signals and sends them to the control module. The control module correspondingly sends adjustment control signals to the refrigeration module, the heating module and the alarm module to adjust the temperature and the alarm, thereby automatically adjusting the water temperature and the alarm of the chiller according to the ambient temperature. The structure is simple and the adjustment accuracy is high, which can meet user needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of a control panel of a chiller temperature controller provided in an embodiment of the present application;

[0016] Figure 2 It is a schematic diagram of the display screen structure of a chiller temperature controller provided in an embodiment of the present application;

[0017] Figure 3 It is a temperature sensor input detection circuit diagram of a chiller temperature controller provided in an embodiment of the present application;

[0018] Figure 4 It is a flow sensor input detection circuit diagram of a chiller temperature controller provided in an embodiment of the present application;

[0019] Figure 5 This is a main control IC circuit diagram of a chiller temperature controller provided in an embodiment of the present application;

[0020] Figure 6It is an external signal input detection circuit diagram of a chiller temperature controller provided in an embodiment of the present application;

[0021] Figure 7 It is a display driving circuit diagram of a chiller temperature controller provided in an embodiment of the present application;

[0022] Figure 8 This is a driving digital tube circuit diagram of a chiller temperature controller provided in an embodiment of the present application;

[0023] Fig. 9 It is a circuit diagram of an indicator light of a chiller temperature controller provided in an embodiment of the present application;

[0024] Fig.10 It is a buzzer circuit diagram of a chiller temperature controller provided in an embodiment of the present application;

[0025] Fig.11 It is a relay switch circuit diagram of a chiller temperature controller provided in an embodiment of the present application;

[0026] Fig.12 This is a relay control circuit diagram of a chiller temperature controller provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the present application clearer, the specific embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. It is understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for the convenience of description, only the part related to the present application but not all the contents are shown in the accompanying drawings. Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow chart describes each operation (or step) as a sequential process, many of the operations therein can be implemented in parallel, concurrently or simultaneously. In addition, the order of each operation can be rearranged. The process can be terminated when its operation is completed, but it can also have additional steps not included in the accompanying drawings. The process can correspond to a method, a function, a procedure, a subroutine, a subprogram, etc.

[0028] The chiller temperature controller of the embodiment of the present application is provided to avoid the problem that the existing water chiller cannot realize automatic adjustment and control according to the ambient temperature, has a low automation level, and cannot meet the user's needs.

[0029] Figure 1 A schematic diagram of the circuit structure of a chiller temperature controller provided in an embodiment of the present application. Figure 1 and Figure 2The chiller temperature controller includes a control panel and a display screen, wherein the control panel is connected to the display screen, and the control panel includes a control module, a detection module, a signal input module, a power module, an alarm module, a heater, a compressor, a refrigeration module and a heating module, wherein the power module is used for power supply, and the control module is connected to the detection module, the signal input module, the power module, the alarm module, the heater, the compressor, the refrigeration module and the heating module; the detection module includes a room temperature probe, a water temperature probe, a flow input interface and a 485 communication interface; the signal input module includes an external input signal line and an analog input signal line; the detection module is used for detecting temperature and flow signals and sending them to the control module, and the control module correspondingly sends adjustment control signals to the refrigeration module, the heating module and the alarm module to adjust the temperature and alarm, and the signal input module is used for receiving external signals and sending them to the control module, and the control module correspondingly controls the refrigeration module, the heating module and the alarm module to adjust the temperature and alarm.

[0030] As described above, the embodiment of the present application detects temperature and flow signals through the detection module and sends them to the control module. The signal input module receives external signals and sends them to the control module. The control module correspondingly sends adjustment control signals to the refrigeration module, heating module and alarm module to adjust the temperature and alarm, thereby automatically adjusting the water temperature and alarm of the chiller according to the ambient temperature. The structure is simple and the adjustment accuracy is high, which can meet user needs.

[0031] Specifically, when the power is cut off and the machine is shut down, the buzzer does not sound and the relay does not operate; during normal operation, the buzzer does not sound and the relay operates; when the room temperature is too high, the buzzer sounds and the relay operates; when the water temperature is too high, the buzzer sounds and the relay does not operate; when the water temperature is too low, the compressor is turned off, the buzzer sounds, and the relay does not operate; when the room temperature probe fails, constant temperature mode: the buzzer does not sound, the relay operates, intelligent mode: the buzzer sounds, the relay does not operate; when the water temperature probe fails, the compressor is turned off, the buzzer sounds, and the relay does not operate; when the external input alarm occurs, the heating module is turned off, the buzzer sounds, and the relay does not operate; when the flow alarm occurs, the heating module is turned off, the buzzer sounds, and the relay does not operate; when the analog alarm occurs, the heating module is turned off, the buzzer sounds, and the relay does not operate; when the liquid level alarm occurs, the compressor and heating module are turned off, the buzzer sounds, and the relay does not operate.

[0032] As a preferred embodiment, the refrigeration module includes a refrigeration solenoid valve and a refrigeration switch, and the refrigeration switch is connected to the control module and the refrigeration solenoid valve; the heating module includes a heating solenoid valve and a heating switch, and the heating switch is connected to the control module and the heating solenoid valve.

[0033] As a preferred implementation, the alarm module includes a buzzer, a relay, an alarm input terminal, an alarm normally open terminal and an alarm normally closed terminal.

[0034] As a preferred implementation, the detection module further includes a water level switch signal interface, and the water level switch signal interface is connected to the control module.

[0035] As a preferred embodiment, the room temperature probe and the water temperature probe are both provided with a temperature sensor and a temperature sensor input detection circuit, please refer to Figure 3 This circuit is a temperature sensor input detection circuit. The temperature sensor output signal is converted into a signal recognized by the main control IC circuit through the circuit. The temperature sensor input detection circuit includes a first resistor R9, a second resistor R10, a first capacitor C2 and a second capacitor C3. The first end of the first resistor R9 is connected to the temperature sensor, the second end of the first resistor R9 is connected to the first end of the first capacitor C2, the first end of the second capacitor C3 and the first end of the second resistor R10, the second end of the first capacitor C2 is connected to the power supply end, the second end of the second capacitor C3 is connected to the ground end, and the second end of the second resistor R10 is connected to the control module.

[0036] As a preferred embodiment, the flow input interface includes a flow sensor and a flow sensor input detection circuit, please refer to Figure 4 This circuit is a flow sensor input detection circuit. The flow sensor output signal is converted into a signal recognized by the main control IC circuit through this circuit. The flow sensor input detection circuit includes the third resistor R17, the fourth resistor R18 and the third capacitor C11. The first end of the third resistor R17 is connected to the flow sensor, the second end of the third resistor R17 is connected to the first end of the fourth resistor R18, the first end of the third capacitor C11 and the control module, the second end of the fourth resistor R18 is connected to the power supply end, and the second end of the third capacitor C11 is connected to the ground end.

[0037] As a preferred embodiment, the control module includes a main control IC circuit, please refer to Figure 5This circuit is a main control IC circuit, which controls the operation logic of the entire controller. The main control IC circuit includes a main control IC chip U4, a first crystal oscillator Y1, a fourth capacitor C12, a fifth capacitor C13, a sixth capacitor C10, a first electrolytic capacitor EC4 and a second electrolytic capacitor EC1. The 20th pin of the main control IC chip U4 is connected to the first end of the fourth capacitor C12, the first end of the first electrolytic capacitor EC4, the first end of the second electrolytic capacitor EC1 and the ground end, the 21st pin is connected to the second end of the fourth capacitor C12, the second end of the first electrolytic capacitor EC4, the second end of the second electrolytic capacitor EC1 and the power supply end, the 23rd pin is connected to the first end of the first crystal oscillator Y1 and the first end of the fifth capacitor C13, the 24th pin is connected to the second end of the first crystal oscillator Y1 and the first end of the fourth capacitor C12, and the second end of the fifth capacitor C13 and the second end of the fourth capacitor C12 are connected to the power supply end.

[0038] As a preferred embodiment, the external input signal line includes an external signal input detection circuit, please refer to Figure 6 This circuit is an external signal input detection circuit. The external input signal is converted into a signal recognized by the main control IC circuit through the circuit. The external signal input detection circuit includes a fifth resistor R13, a sixth resistor R14, a seventh capacitor C6 and an eighth capacitor C7. The first end of the fifth resistor R13 is connected to the signal input end, the second end of the fifth resistor R13 is connected to the first end of the seventh capacitor C6, the first end of the eighth capacitor C7, the first end of the sixth resistor R14 and the control module, the second end of the seventh capacitor C6 is connected to the ground end, and the second end of the eighth capacitor C7 is connected to the second end of the sixth resistor R14 and the ground end.

[0039] As a preferred implementation, please refer to Figure 7-9 The display screen includes a display drive circuit, a drive digital tube U1 and an indicator light. Please refer to Figure 7, this circuit is a display driving circuit. The display driving circuit receives relevant signals, drives the digital tube U1, and the indicator light displays relevant data and lights up the indicator light. The display driving circuit connects the driving digital tube U1 and the indicator light. The display driving circuit includes a display driving chip U2, a seventh resistor R21, an eighth resistor R20, a ninth resistor R19, a ninth capacitor C1, a third electrolytic capacitor EC2 and a fourth electrolytic capacitor EC3. The second pin of the display driving chip U2 is connected to the first end of the ninth resistor R19, the third pin is connected to the first end of the eighth resistor R20, the fourth pin is connected to the first end of the seventh resistor R21, the eighth pin to the fourteenth pin are connected to the indicator light, the eighteenth pin to the twentieth pin are connected to the driving digital tube U1, and the twenty-fourth pin, the twenty-sixth pin and the twenty-seventh pin are connected to the driving digital tube U1. The code tube U1, the twenty-second pin is connected to the twenty-fifth pin, the twenty-eighth pin, the first end of the ninth capacitor C1, the first end of the third electrolytic capacitor EC2 and the first end of the fourth electrolytic capacitor EC3, the second end of the ninth capacitor C1, the second end of the third electrolytic capacitor EC2, the second end of the fourth electrolytic capacitor EC3, the second end of the seventh resistor R21, the second end of the eighth resistor R20 and the second end of the ninth resistor R19 are connected to the power supply end; the indicator light includes a first diode LED1 and a second diode LED2 which are connected in parallel and connected to the display driver chip U2.

[0040] As a preferred implementation, please refer to Figure 10-12 , which are the buzzer circuit diagram, relay switch circuit diagram and relay control circuit diagram respectively. The main control IC chip U4 outputs a weak current control signal to the relay control circuit, and then the relay control circuit outputs enough current to control the corresponding relay switch and buzzer, and controls the on-off of the external load according to the relevant control signal.

[0041] The above are only preferred embodiments of the present application and the technical principles used. The present application is not limited to the specific embodiments described herein, and various obvious changes, readjustments and substitutions that can be made by those skilled in the art will not deviate from the scope of protection of the present application. Therefore, although the present application is described in more detail through the above embodiments, the present application is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the claims.

Claims

1. A chiller temperature controller, characterized in that: include: A control panel and a display screen, wherein the control panel is connected to the display screen, and the control panel comprises a control module, a detection module, a signal input module, a power module, an alarm module, a heater, a compressor, a refrigeration module and a heating module, wherein the power module is used for power supply, and the control module is connected to the detection module, the signal input module, the power module, the alarm module, the heater, the compressor, the refrigeration module and the heating module; the detection module comprises a room temperature probe, a water temperature probe, a flow input interface and a 485 communication interface; the signal input module comprises an external input signal line and an analog input signal line; the detection module is used for detecting temperature and flow signals and sending them to the control module, and the control module correspondingly sends adjustment control signals to the refrigeration module, the heating module and the alarm module to adjust the temperature and alarm, and the signal input module is used for receiving external signals and sending them to the control module, and the control module correspondingly controls the refrigeration module, the heating module and the alarm module to adjust the temperature and alarm.

2. The chiller temperature controller according to claim 1, characterized in that: The cooling module includes a cooling solenoid valve and a cooling switch, and the cooling switch is connected to the control module and the cooling solenoid valve; the heating module includes a heating solenoid valve and a heating switch, and the heating switch is connected to the control module and the heating solenoid valve.

3. The chiller temperature controller according to claim 1, characterized in that: The alarm module includes a buzzer, a relay, an alarm input terminal, an alarm normally open terminal and an alarm normally closed terminal.

4. The chiller temperature controller according to claim 1, characterized in that: The detection module also includes a water level switch signal interface, and the water level switch signal interface is connected to the control module.

5. The chiller temperature controller according to claim 1, characterized in that: The room temperature probe and the water temperature probe are both provided with a temperature sensor and a temperature sensor input detection circuit, the temperature sensor input detection circuit comprises a first resistor, a second resistor, a first capacitor and a second capacitor, the first end of the first resistor is connected to the temperature sensor, the second end of the first resistor is connected to the first end of the first capacitor, the first end of the second capacitor and the first end of the second resistor, the second end of the first capacitor is connected to the power supply end, the second end of the second capacitor is connected to the ground end, and the second end of the second resistor is connected to the control module.

6. The chiller temperature controller according to claim 1, characterized in that: The flow input interface includes a flow sensor and a flow sensor input detection circuit, the flow sensor input detection circuit includes a third resistor, a fourth resistor and a third capacitor, the first end of the third resistor is connected to the flow sensor, the second end of the third resistor is connected to the first end of the fourth resistor, the first end of the third capacitor and the control module, the second end of the fourth resistor is connected to the power supply end, and the second end of the third capacitor is connected to the ground end.

7. The chiller temperature controller according to claim 1, characterized in that: The control module includes a main control IC circuit, which includes a main control IC chip, a first crystal oscillator, a fourth capacitor, a fifth capacitor, a sixth capacitor, a first electrolytic capacitor and a second electrolytic capacitor. The twentieth pin of the main control IC chip is connected to the first end of the sixth capacitor, the first end of the first electrolytic capacitor, the first end of the second electrolytic capacitor and the ground terminal, the twenty-first pin is connected to the second end of the sixth capacitor, the second end of the first electrolytic capacitor, the second end of the second electrolytic capacitor and the power supply terminal, the twenty-third pin is connected to the first end of the first crystal oscillator and the first end of the fifth capacitor, the twenty-fourth pin is connected to the second end of the first crystal oscillator and the first end of the fourth capacitor, and the second end of the fourth capacitor and the second end of the fifth capacitor are connected to the power supply terminal.

8. The chiller temperature controller according to claim 1, characterized in that: The external input signal line includes an external signal input detection circuit, which includes a fifth resistor, a sixth resistor, a seventh capacitor and an eighth capacitor. The first end of the fifth resistor is connected to the signal input end, the second end of the fifth resistor is connected to the first end of the seventh capacitor, the first end of the eighth capacitor, the first end of the sixth resistor and the control module, the second end of the seventh capacitor is connected to the ground end, and the second end of the eighth capacitor is connected to the second end of the sixth resistor and the ground end.

9. The chiller temperature controller according to claim 1, characterized in that: The display screen comprises a display driving circuit, a driving digital tube and an indicator light, and the display driving circuit is connected to the driving digital tube and the indicator light.

10. The chiller temperature controller according to claim 9, characterized in that: The display driving circuit includes a display driving chip, a seventh resistor, an eighth resistor, a ninth resistor, a ninth capacitor, a third electrolytic capacitor and a fourth electrolytic capacitor. The second pin of the display driving chip is connected to the first end of the ninth resistor, the third pin is connected to the first end of the eighth resistor, the fourth pin is connected to the first end of the seventh resistor, the eighth pin to the fourteenth pin are connected to the indicator light, the eighteenth pin to the twentieth pin are connected to the driving digital tube, the twenty-fourth pin, the twenty-sixth pin and the twenty-seventh pin are connected to the driving digital tube, the twenty-second pin is connected to the twenty-fifth pin, the twenty-eighth pin, the first end of the ninth capacitor, the first end of the third electrolytic capacitor and the first end of the fourth electrolytic capacitor, and the second end of the ninth capacitor, the second end of the third electrolytic capacitor, the second end of the fourth electrolytic capacitor, the second end of the seventh resistor, the second end of the eighth resistor and the second end of the ninth resistor are connected to the power supply end.

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