Heat preservation cabinet controller

Abstract

The utility model discloses a heat preservation cabinet controller, which belongs to the technical field of heat preservation equipment and is characterized in that a three-wire serial interface of a singlechip IC1 is electrically connected with a three-wire serial interface of a nixie tube display driving chip IC2, and an RS485 interface of the singlechip IC1 is electrically connected with an RS485 interface of a second serial communication chip IC4; the non-inverting end of data transmission of the second serial communication chip IC4 is electrically connected with the non-inverting end of data transmission of the first serial communication chip IC3, the inverting end of data transmission of the second serial communication chip IC4 is electrically connected with the inverting end of data transmission of the first serial communication chip IC3, and the RS485 interface of the first serial communication chip IC3 is electrically connected with the RS485 interface of the MCU; and the nixie tube display driving chip IC2 is electrically connected with the temperature display panel and / or the time display panel. The heat preservation cabinet controller solves the problem that the temperature and the time of an existing heat preservation cabinet cannot be independently set at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of heat preservation equipment, in particular to a heat preservation cabinet controller. Background Art

[0002] Warming cabinets are commonly used in kitchens to heat food and maintain a constant temperature. Existing warming cabinets typically have a panel on the cabinet body to display operating parameters. Warming cabinets typically require two key parameters to be displayed and set: temperature and holding time. However, these two parameters are currently displayed and set on a single panel, making it impossible to set them separately at the same time. Utility Model Content

[0003] In order to overcome the defects of the prior art, the utility model provides a thermal insulation cabinet controller to solve the above problems.

[0004] The utility model solves the technical problem by adopting the following technical solution: a thermal insulation cabinet controller, comprising an MCU, a temperature display panel and a time display panel, wherein the temperature display panel and the time display panel are both arranged on the wall of the thermal insulation cabinet, and the MCU is respectively connected to the temperature display panel and the time display panel via corresponding display driver modules;

[0005] The display driver module includes a single-chip microcomputer IC1, a digital tube display driver chip IC2, a first serial communication chip IC3 and a second serial communication chip IC4; the three-wire serial interface of the single-chip microcomputer IC1 is electrically connected to the three-wire serial interface of the digital tube display driver chip IC2, the RS485 interface of the single-chip microcomputer is electrically connected to the RS485 interface of the second serial communication chip IC4, the non-inverting end of the data transmission of the second serial communication chip IC4 is electrically connected to the non-inverting end of the data transmission of the first serial communication chip IC3, the inverting end of the data transmission of the second serial communication chip IC4 is electrically connected to the inverting end of the data transmission of the first serial communication chip IC3, and the RS485 interface of the first serial communication chip IC3 is electrically connected to the RS485 interface of the MCU;

[0006] The digital tube display driver chip IC2 is electrically connected to the temperature display panel and / or the time display panel.

[0007] It is worth noting that it also includes a temperature acquisition module, which includes a temperature sensor, a resistor R71 and a resistor R31. The temperature sensor is arranged in the thermal insulation cabinet, one end of the temperature sensor is grounded, and the other end of the temperature sensor is electrically connected to one end of the resistor R71 and one end of the resistor R31 respectively. The other end of the resistor R71 is electrically connected to the power supply, and the other end of the resistor R31 is electrically connected to the temperature acquisition terminal T1 of the MCU.

[0008] Optionally, a heating module is also included, which includes a heater, an NPN transistor Q1, an optocoupler IC12 and a thyristor IC32. The heater is arranged in the thermal insulation cabinet, the base of the NPN transistor Q1 is electrically connected to the heating output end of the MCU, the emitter of the NPN transistor Q1 is electrically connected, the collector of the NPN transistor is electrically connected to one end of the input side of the optocoupler IC12, the other end of the input side of the optocoupler IC12 is electrically connected to the power supply, one end of the output side of the optocoupler IC12 is electrically connected to the live wire, the other end of the output side of the optocoupler IC12 is electrically connected to the control end of the thyristor IC32, one end of the thyristor IC32 is electrically connected to the live wire, and the other end of the thyristor IC32 is electrically connected to the heater.

[0009] Preferably, the power supply includes a transformer T, a rectifier bridge DB1 and a power regulator IC20, the primary side of the transformer T is electrically connected to the mains, the secondary side of the transformer T is electrically connected to the input end of the rectifier bridge DB1, the output end of the rectifier bridge DB1 serves as the 12V voltage output end of the power supply and is electrically connected to the input end of the power regulator IC20, and the output end of the power regulator IC20 serves as the 5V voltage output end of the power supply.

[0010] Specifically, the power supply also includes an NPN transistor Q3, the base of the NPN transistor Q3 is electrically connected to the primary side of the transformer T, the emitter of the NPN transistor Q3 is grounded, the collector of the NPN transistor Q3 is electrically connected to the 5V voltage output end of the power supply, and the collector of the NPN transistor Q3 is also electrically connected to the zero-crossing signal acquisition end of the MCU.

[0011] Optionally, a button is further included, which is arranged on the wall of the thermal insulation cabinet and is electrically connected to the button signal input end of the digital tube display driver chip IC2.

[0012] The beneficial effect of the present invention is that: in the thermal insulation cabinet controller, two RS485 interfaces are set on the MCU, and the temperature display panel and the time display panel are electrically connected to the RS485 interface corresponding to the MCU through an independent display driver module; in this way, one MCU can simultaneously control the two display driver modules through serial communication, and the temperature display panel and the time display panel are respectively controlled by the two display driver modules, thereby realizing independent display and independent setting of the temperature display panel and the time display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a system block diagram of a thermal insulation cabinet controller in one embodiment of the present invention;

[0014] Figure 2 This is a peripheral circuit diagram of an MCU in one embodiment of the present utility model;

[0015] Figure 3 This is a circuit diagram of a time display panel and a display driving module in one embodiment of the present utility model;

[0016] Figure 4 This is a circuit diagram of a temperature display panel and a display driving module in one embodiment of the present invention;

[0017] Figure 5 This is a circuit diagram of a temperature acquisition module in one embodiment of the present utility model;

[0018] Figure 6 This is a circuit diagram of a heating module in one embodiment of the present invention;

[0019] Figure 7 A circuit diagram of a power supply in one embodiment of the present invention;

[0020] Figure 8 The figure is a circuit diagram of a buzzer-related circuit in one embodiment of the present invention. DETAILED DESCRIPTION

[0021] The following further describes specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the descriptions of these embodiments are intended to aid understanding of the present invention and do not constitute limitations on the present invention. Furthermore, the technical features involved in the various embodiments of the present invention described below may be combined with one another as long as they do not conflict with one another.

[0022] like Figure 1-8 As shown, a thermal insulation cabinet controller includes an MCU, a temperature display panel, and a time display panel. The temperature display panel and the time display panel are both arranged on the wall of the thermal insulation cabinet. The MCU is respectively connected to the temperature display panel and the time display panel through corresponding display driver modules;

[0023] like Figure 3 and 4As shown, the display driver module includes a single-chip microcomputer IC1, a digital tube display driver chip IC2, a first serial communication chip IC3 and a second serial communication chip IC4; the three-wire serial interface (DIO, CLK and STB) of the single-chip microcomputer IC1 is electrically connected to the three-wire serial interface of the digital tube display driver chip IC2, the RS485 interface of the single-chip microcomputer is electrically connected to the RS485 interface of the second serial communication chip IC4, the non-inverting end of the data transmission of the second serial communication chip IC4 is electrically connected to the non-inverting end of the data transmission of the first serial communication chip IC3, the inverting end of the data transmission of the second serial communication chip IC4 is electrically connected to the inverting end of the data transmission of the first serial communication chip IC3, and the RS485 interface of the first serial communication chip IC3 is electrically connected to the RS485 interface of the MCU;

[0024] The digital tube display driver chip IC2 is electrically connected to the temperature display panel and / or the time display panel.

[0025] In the thermal insulation cabinet controller, two RS485 interfaces are set in the MCU, and the temperature display panel and the time display panel are electrically connected to the RS485 interface corresponding to the MCU through an independent display driver module; in this way, the two display driver modules can be controlled simultaneously by one MCU through serial communication, and the temperature display panel and the time display panel can be controlled respectively by the two display driver modules, so as to realize independent display and independent setting of the temperature display panel and the time display panel. In this solution, the temperature display panel and the time display panel can be used flexibly, and can be installed at the same time, or any panel can be installed separately. In addition to having individually set parameters, this controller can realize data sharing by communicating with the MCU, and shared data can realize data synchronization. If the temperature display panel and the time display panel are in the power-on state at the same time, if the preset program parameters of one of the panels are changed, the preset program parameters of the other panel, the temperature parameters of the current group, and the power parameters will be automatically synchronized.

[0026] In this embodiment, the time display panel is a digital display tube of model E40401F, whose input terminals are electrically connected to output ports SG1 to SG8 of the digital display driver chip IC2, and which has four ground terminals corresponding to the four 8-shaped LED light groups of the digital display tube, and whose four ground terminals are electrically connected to ground ports GRID1 to GRID4 of the digital display driver chip IC2. The temperature display panel is a digital display tube of model GS3930AR-G, whose input terminals are electrically connected to output ports SG1 to SG8 of the digital display driver chip IC2, and which has three ground terminals corresponding to the three 8-shaped LED light groups of the digital display tube, and whose three ground terminals are electrically connected to ground ports GRID5 to GRID7 of the digital display driver chip IC2.

[0027] It is worth noting that if Figure 5 As shown, the device further includes a temperature acquisition module, which includes a temperature sensor, a resistor R71, and a resistor R31. The temperature sensor is disposed within the thermal insulation cabinet, with one end of the temperature sensor being grounded and the other end of the temperature sensor being electrically connected to one end of the resistor R71 and one end of the resistor R31, respectively. The other end of the resistor R71 is electrically connected to a power supply, and the other end of the resistor R31 is electrically connected to the temperature acquisition terminal T1 of the MCU. The temperature sensor can change its resistance according to the temperature within the thermal insulation cabinet, thereby cooperating with the resistors R71 and R31 to change the voltage input to the temperature acquisition terminal T1 of the MCU, thereby enabling the MCU to recognize different temperature values.

[0028] Optional, such as Figure 6 As shown, it also includes a heating module, which includes a heater, an NPN transistor Q1, an optocoupler IC12 and a thyristor IC32. The heater is arranged in the thermal insulation cabinet, the base of the NPN transistor Q1 is electrically connected to the heating output end of the MCU, the emitter of the NPN transistor Q1 is electrically connected, the collector of the NPN transistor is electrically connected to one end of the input side of the optocoupler IC12, the other end of the input side of the optocoupler IC12 is electrically connected to the power supply, one end of the output side of the optocoupler IC12 is electrically connected to the live wire, the other end of the output side of the optocoupler IC12 is electrically connected to the control end of the thyristor IC32, one end of the thyristor IC32 is electrically connected to the live wire, and the other end of the thyristor IC32 is electrically connected to the heater.

[0029] The MCU adjusts the output signal of its heating output end according to the temperature change in the thermal insulation cabinet and the temperature threshold set on the temperature display panel, thereby controlling the operation of the heater. Specifically, when the heating output end of the MCU outputs a high level, the NPN transistor Q1 is turned on, and one end of the input side of the photocoupler IC12 is grounded, thereby achieving power-on. At this time, the output side of the photocoupler IC12 is turned on, and the control end of the thyristor IC32 is energized, causing the thyristor IC32 to be turned on, and then the heater is powered on.

[0030] Preferably, Figure 7 As shown, the power supply includes a transformer T, a rectifier bridge DB1 and a power regulator IC20. The primary side of the transformer T is electrically connected to the mains, the secondary side of the transformer T is electrically connected to the input end of the rectifier bridge DB1, the output end of the rectifier bridge DB1 serves as the 12V voltage output end of the power supply and is electrically connected to the input end of the power regulator IC20, and the output end of the power regulator IC20 serves as the 5V voltage output end of the power supply.

[0031] The 5V voltage output end is used to power the single chip microcomputer IC1, the digital tube display driver chip IC2, the first serial communication chip IC3, the second serial communication chip IC4, the other end of the input side of the photocoupler IC12, the MCU and the other end of the resistor R71.

[0032] like Figure 8 As shown, the thermal insulation cabinet controller also includes a buzzer and an NPN transistor Q3, the base of the NPN transistor Q3 is electrically connected to the buzzer drive terminal BZ of the MCU, the emitter of the NPN transistor Q3 is grounded, the collector of the NPN transistor Q3 is electrically connected to the negative pole of the buzzer, and the positive pole of the buzzer is electrically connected to the 12V voltage output terminal of the power supply.

[0033] Specifically, if Figure 7 As shown, the power supply also includes an NPN transistor Q3, the base of the NPN transistor Q3 is electrically connected to the primary side of the transformer T, the emitter of the NPN transistor Q3 is grounded, the collector of the NPN transistor Q3 is electrically connected to the 5V voltage output end of the power supply, and the collector of the NPN transistor Q3 is also electrically connected to the zero-crossing signal acquisition end of the MCU.

[0034] When both the primary side of the transformer T and the 5V voltage output terminal have electrical signals, the zero-crossing signal acquisition terminal will have a high-level signal. When one of the primary side of the transformer T and the 5V voltage output terminal has no electrical signal or both have no electrical signals, the zero-crossing signal acquisition terminal will have a low-level signal. In this way, it can be determined whether the power supply is working.

[0035] It is worth noting that if Figure 3 and 4 As shown, the thermal cabinet further includes a key, which is disposed on a wall surface of the thermal cabinet and electrically connected to a key signal input terminal of the digital tube display driver chip IC2. In this embodiment, both port K1 and port K2 of the digital tube display driver chip IC2 are key signal input terminals. Each display driver module's digital tube display driver chip IC2 is electrically connected to a different key, enabling separate settings for the timing time and temperature threshold.

[0036] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A thermal insulation cabinet controller, characterized in that: It includes an MCU, a temperature display panel and a time display panel. The temperature display panel and the time display panel are both arranged on the wall of the thermal insulation cabinet. The MCU is respectively connected to the temperature display panel and the time display panel through corresponding display driver modules. The display driver module includes a single-chip microcomputer IC1, a digital tube display driver chip IC2, a first serial communication chip IC3 and a second serial communication chip IC4; the three-wire serial interface of the single-chip microcomputer IC1 is electrically connected to the three-wire serial interface of the digital tube display driver chip IC2, the RS485 interface of the single-chip microcomputer is electrically connected to the RS485 interface of the second serial communication chip IC4, the non-inverting end of the data transmission of the second serial communication chip IC4 is electrically connected to the non-inverting end of the data transmission of the first serial communication chip IC3, the inverting end of the data transmission of the second serial communication chip IC4 is electrically connected to the inverting end of the data transmission of the first serial communication chip IC3, and the RS485 interface of the first serial communication chip IC3 is electrically connected to the RS485 interface of the MCU; The digital tube display driver chip IC2 is electrically connected to the temperature display panel and / or the time display panel.

2. A thermal insulation cabinet controller according to claim 1, characterized in that: It also includes a temperature acquisition module, which includes a temperature sensor, a resistor R71 and a resistor R31. The temperature sensor is arranged in the thermal insulation cabinet, one end of the temperature sensor is grounded, and the other end of the temperature sensor is electrically connected to one end of the resistor R71 and one end of the resistor R31 respectively. The other end of the resistor R71 is electrically connected to the power supply, and the other end of the resistor R31 is electrically connected to the temperature acquisition terminal T1 of the MCU.

3. The thermal insulation cabinet controller according to claim 1, characterized in that: It also includes a heating module, which includes a heater, an NPN transistor Q1, an optocoupler IC12 and a thyristor IC32. The heater is arranged in the thermal insulation cabinet, the base of the NPN transistor Q1 is electrically connected to the heating output end of the MCU, the emitter of the NPN transistor Q1 is electrically connected, the collector of the NPN transistor is electrically connected to one end of the input side of the optocoupler IC12, the other end of the input side of the optocoupler IC12 is electrically connected to the power supply, one end of the output side of the optocoupler IC12 is electrically connected to the live wire, the other end of the output side of the optocoupler IC12 is electrically connected to the control end of the thyristor IC32, one end of the thyristor IC32 is electrically connected to the live wire, and the other end of the thyristor IC32 is electrically connected to the heater.

4. A thermal insulation cabinet controller according to claim 2, characterized in that: The power supply includes a transformer T, a rectifier bridge DB1 and a power regulator IC20. The primary side of the transformer T is electrically connected to the mains, the secondary side of the transformer T is electrically connected to the input end of the rectifier bridge DB1, the output end of the rectifier bridge DB1 serves as the 12V voltage output end of the power supply and is electrically connected to the input end of the power regulator IC20, and the output end of the power regulator IC20 serves as the 5V voltage output end of the power supply.

5. A thermal insulation cabinet controller according to claim 4, characterized in that: The power supply also includes an NPN transistor Q3, the base of the NPN transistor Q3 is electrically connected to the primary side of the transformer T, the emitter of the NPN transistor Q3 is grounded, the collector of the NPN transistor Q3 is electrically connected to the 5V voltage output end of the power supply, and the collector of the NPN transistor Q3 is also electrically connected to the zero-crossing signal acquisition end of the MCU.

6. The thermal insulation cabinet controller according to claim 1, characterized in that: It also includes a button, which is arranged on the wall of the thermal insulation cabinet and is electrically connected to the button signal input end of the digital tube display driver chip IC2.

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