Control system of freezing and refrigerating cabinet temperature controller input interface and use method

Abstract

The invention provides a control system for an input interface of a temperature controller of a freezing and refrigerating cabinet and a use method, the control system comprises a plurality of peripheral interfaces, an analog quantity configuration interface and at least one function configuration module, and the function configuration module is connected with at least one input interface of the temperature controller. The working mode of the function configuration module can be switched by transmitting the high level and the low level to the function configuration module, so that a user can quickly configure the corresponding input interface according to the type of the peripheral to be accessed, the accuracy of the corresponding input signal is ensured, complex operation is not needed, and the user experience is improved. The flexibility and the application range of the system are greatly enhanced, meanwhile, the use threshold is lowered, and the user experience is improved.

Description

Technical Field

[0001] The invention relates to the field of industrial control, and in particular to a control system and a use method of a temperature controller input interface of a refrigeration cabinet. Background Art

[0002] With the continuous advancement of food preservation and freezing technology, freezers and refrigerators are increasingly used in homes, businesses, and industries. As one of the core components of freezers and refrigerators, the main function of the thermostat is to monitor and adjust the temperature inside the cabinet to ensure the freshness and safety of food. Traditional thermostat designs usually only accept specific types of input signals, such as analog or digital signals. However, this single input type design is incapable of meeting the diverse peripheral access requirements.

[0003] In actual use, users may need to connect various types of external devices to the thermostat, such as temperature sensors, humidity sensors, pressure sensors, etc. Some of these peripherals output analog signals, while others output digital signals. If the input interface of the thermostat cannot be flexibly configured to accommodate different signal types, users will need additional conversion equipment or select specific types of peripherals, which not only increases costs but also limits the flexibility of the system.

[0004] In addition, existing solutions often require complex hardware modifications or external conversion equipment to achieve compatibility with different types of signals, which not only increases costs but also reduces system reliability and ease of use. For non-professionals, adjusting and configuring these systems can be complex and time-consuming.

[0005] Therefore, the market urgently needs a thermostat interface system that can flexibly configure the input signal type to better adapt to different application scenarios and equipment. Such a system should be able to simplify the operation process, lower the threshold for use, and improve the compatibility and stability of the system. Summary of the invention

[0006] In order to solve the above problems, the present invention proposes a control system and a use method of a temperature controller input interface of a freezer and refrigerator.

[0007] The main contents of the present invention include:

[0008] A control system for a temperature controller input interface of a freezer and refrigerator, comprising a plurality of peripheral interfaces and an analog quantity configuration interface, wherein the peripheral interface is used to realize the input and output of analog quantities and switch quantities; the analog quantity configuration interface is respectively connected to the input interface of the temperature controller through a corresponding control module; a single peripheral interface is respectively connected to the input interface of a temperature controller through an input branch; at least one input interface of the temperature controller is connected to a function configuration module; the function configuration module is used to receive a switching command from a user.

[0009] Preferably, the function configuration module includes a command input interface, a PNP type function transistor and a function resistor, the command input interface is used to receive a user's switching command, the command input interface is connected to the base of the function transistor, the collector of the function transistor is connected to the input interface of the corresponding temperature controller through the function resistor, and its emitter is connected to a power supply.

[0010] Preferably, the functional configuration module also includes a functional current limiting resistor and a functional pull-down resistor, and the two ends of the functional current limiting resistor are respectively connected to the command input interface and the base of the functional transistor; the two ends of the functional pull-down resistor are connected between the base and emitter of the functional transistor.

[0011] Preferably, the control module includes a control MOS tube, a first control resistor and a second control resistor, the gate of the control MOS tube is connected to the analog quantity configuration interface, the drain is connected to the input interface of the corresponding temperature controller through the first control resistor, and the source is connected to the input interface of the corresponding temperature controller through the second control resistor; and a power supply is connected between the second control resistor and the control MOS tube.

[0012] Preferably, the analog quantity configuration interface is connected to the plurality of control modules via a control current limiting resistor.

[0013] Preferably, the input branch includes an input current limiting resistor, and two ends of the input current limiting resistor are respectively connected to the corresponding peripheral interface and the input interface of the temperature controller.

[0014] Preferably, the input branch further includes a protection capacitor, one end of which is connected between the input current limiting resistor and the peripheral interface, and the other end of which is grounded.

[0015] The present invention also proposes a method for using a control system of a temperature controller input interface of a freezer and refrigerator, comprising the following steps:

[0016] The user switches the working mode of the function configuration module according to the type of peripherals to be connected to the thermostat; the working mode includes a digital mode and an analog mode; the type of peripherals to be connected to the thermostat includes a digital peripheral and an analog peripheral.

[0017] Wherein, when the function configuration module is in digital mode, the function configuration module provides a large current rust removal function for the corresponding input branch;

[0018] When the function configuration module is in the analog mode, the control module receives the configuration parameters of the analog configuration interface and filters the corresponding analog peripherals;

[0019] Preferably, the user switches the working mode of the function configuration module according to the type of the peripheral device to be connected to the thermostat, including:

[0020] When the type of the peripheral to be connected to the temperature controller is a digital peripheral, the corresponding peripheral is connected to the corresponding input interface connected to the function configuration module, and a low level is input to the function configuration module to put the function configuration module in digital mode;

[0021] When the types of peripherals to be connected to the temperature controller are all analog peripherals, a high level is input to the function configuration module to put the function configuration module in analog mode.

[0022] Compared with the prior art, the present invention proposes a control system and a method for using a temperature controller input interface of a freezer and refrigerator, the beneficial effects of which are: by connecting a function configuration module to at least one input interface and switching the working mode of the function configuration module by transmitting high and low levels to the function configuration module, the user can quickly configure the corresponding input interface according to the type of peripheral to be connected, thereby ensuring the accuracy of the corresponding input signal without the need for complicated operations, greatly enhancing the flexibility and application scope of the system, while lowering the usage threshold and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a circuit diagram of the present invention. DETAILED DESCRIPTION

[0024] The technical solution protected by the present invention is described in detail below with reference to the accompanying drawings.

[0025] See also Figure 1 The present invention provides a control system for the input interface of a freezer and refrigerator thermostat, which can provide a flexible input interface configuration for the freezer and refrigerator thermostat, and enables users to access different types of peripherals (digital or analog) according to actual needs through simple control commands.

[0026] Specifically, the improvement of the present invention is made on the basis of the existing thermostat. The processing unit of the existing thermostat has the performance of processing analog signals and digital signals, that is, for a signal input by a certain input interface, the processing unit of the thermostat can identify the input signal type and perform corresponding processing. For example, the RS485 input interface in the prior art can receive both analog signals and digital signals. The improvement of the present invention is to provide users with a simple and flexible way to configure the input interface. Users can control the function configuration module according to the type of peripherals to be connected to the corresponding peripheral interface to ensure the accuracy and anti-interference ability of the corresponding input signal.

[0027] Specifically, Figure 1 As shown, the control system includes several peripheral interfaces (IN1~IN4), an analog configuration interface CONF_PT1000 and at least one functional configuration module 20, wherein the peripheral interface is used to realize the input of analog quantity and switch quantity, that is, to connect peripherals. The peripherals can be analog peripherals or digital peripherals, which are respectively connected to the input interface (IN11~IN41) of the temperature controller through the input branch 10 through the peripheral interface. The signal transmitted by the corresponding peripheral is obtained by the processing unit of the temperature controller, and can be used to output a control signal after corresponding processing, which is used to regulate other equipment such as the compressor.

[0028] The analog configuration interface CONF_PT1000 is connected to the input interface of the temperature controller through the corresponding control module 30; different control modules 30 are used to filter the input signal of the peripheral connected to the corresponding peripheral interface to ensure the accuracy and anti-interference ability of analog signal sampling. The function configuration module 20 is used to receive the user's switching command, so that corresponding control can be performed according to the type of different input signals - filtering the analog signal, using a large current connection method for the digital signal, ensuring that the digital path is connected, and also has a certain rust removal function, ensuring the correctness of the judgment of the digital signal.

[0029] Specifically, the function configuration module includes a command input interface CONF_DI, a PNP type function transistor Q1 and a function resistor R117. The command input interface CONF_DI is used to receive a switching command from a user. The command input interface is connected to the base of the function transistor. The collector of the function transistor is connected to the input interface of the corresponding temperature controller through the function resistor, and its emitter is connected to a power supply.

[0030] In one embodiment, the command input interface can be connected to the door switch to input the corresponding high and low levels to switch the working mode of the function configuration module. The function configuration module 20 can work in analog mode and digital mode. When the command input interface inputs a low level, the functional transistor Q1 is turned on. The thermostat detects the control signal of the command input interface and knows that the corresponding peripheral interface input is a digital signal, and can automatically process the signal. At the same time, by controlling the magnitude of the current input by the function configuration module, the input branch 10' is rust-free with a large current, thereby ensuring the accuracy of digital signal judgment. When the command input interface inputs a high level, the functional transistor Q1 is cut off. At this time, the analog peripheral connected to the peripheral interface can be transmitted to the input interface of the thermostat under the filtering of the control module 30, ensuring the accuracy and anti-interference ability of analog sampling.

[0031] In other embodiments, the function configuration module 20 also includes a functional current limiting resistor and a functional pull-down resistor, and the two ends of the functional current limiting resistor are respectively connected to the command input interface and the base of the functional transistor; the two ends of the functional pull-down resistor are connected between the base and emitter of the functional transistor.

[0032] like Figure 1 The control module 30 in the dotted box includes a control MOS tube Q4, a first control resistor R17 and a second control resistor R16. The gate of the control MOS tube Q4 is connected to the analog configuration interface CONF_PT1000 through the control current limiting resistor R101, and its drain is connected to the input interface (IN31) of the corresponding temperature controller through the first control resistor R17, and its source is connected to the input interface (IN31) of the corresponding temperature controller through the second control resistor R16; and a power supply is connected between the second control resistor R16 and the control MOS tube Q4.

[0033] Furthermore, the input branch 10 includes an input current limiting resistor (R7, R8, R9, R10) and a protection capacitor (C18, C19, C20, C21), and both ends of the input current limiting resistor are respectively connected to the corresponding peripheral interface and the input interface of the temperature controller; one end of the protection capacitor is connected between the input current limiting resistor and the peripheral interface, and the other end thereof is grounded.

[0034] When the user configures the input interface of this control system, the following steps are included:

[0035] The user switches the working mode of the function configuration module according to the type of peripherals to be connected to the thermostat; the working mode includes a digital mode and an analog mode; the type of peripherals to be connected to the thermostat includes a digital peripheral and an analog peripheral.

[0036] When the type of the peripheral to be connected to the temperature controller is a digital peripheral, the corresponding peripheral is connected to the corresponding input interface connected to the function configuration module, and a low level is input to the function configuration module to put the function configuration module in digital mode; when the function configuration module is in digital mode, the function configuration module provides a large current rust removal function for the corresponding input branch;

[0037] When the types of peripherals to be connected to the temperature controller are all analog peripherals, a high level is input to the function configuration module to put the function configuration module in analog mode. When the function configuration module is in analog mode, the control module receives the configuration parameters of the analog configuration interface and filters the corresponding analog peripherals;

[0038] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A control system for a temperature controller input interface of a freezer and refrigerator, characterized in that: It includes several peripheral interfaces and analog quantity configuration interfaces, wherein the peripheral interfaces are used to realize the input of analog quantities and switch quantities; the analog quantity configuration interfaces are respectively connected to the input interfaces of the temperature controllers through corresponding control modules; a single peripheral interface is respectively connected to the input interface of a temperature controller through an input branch; at least one input interface of the temperature controller is connected to a function configuration module; the function configuration module is used to receive the user's switching command.

2. A control system for a temperature controller input interface of a freezer and refrigerator according to claim 1, characterized in that: The function configuration module includes a command input interface, a PNP type function transistor and a function resistor. The command input interface is used to receive a user's switching command. The command input interface is connected to the base of the function transistor. The collector of the function transistor is connected to the input interface of the corresponding temperature controller through the function resistor, and its emitter is connected to a power supply.

3. A control system for a temperature controller input interface of a freezer and refrigerator according to claim 2, characterized in that: The function configuration module also includes a function current limiting resistor and a function pull-down resistor, wherein the two ends of the function current limiting resistor are respectively connected to the command input interface and the base of the function transistor; and the two ends of the function pull-down resistor are connected between the base and emitter of the function transistor.

4. A control system for a temperature controller input interface of a freezer and refrigerator according to claim 1, characterized in that: The control module includes a control MOS tube, a first control resistor and a second control resistor. The gate of the control MOS tube is connected to the analog quantity configuration interface, the drain is connected to the input interface of the corresponding temperature controller through the first control resistor, and the source is connected to the input interface of the corresponding temperature controller through the second control resistor; and a power supply is connected between the second control resistor and the control MOS tube.

5. A control system for a temperature controller input interface of a freezer and refrigerator according to claim 4, characterized in that: The analog quantity configuration interface is connected to the plurality of control modules through adjusting the current limiting resistor.

6. A control system for a temperature controller input interface of a freezer and refrigerator according to claim 1, characterized in that: The input branch includes an input current limiting resistor, and two ends of the input current limiting resistor are respectively connected to the corresponding peripheral interface and the input interface of the temperature controller.

7. A control system for a temperature controller input interface of a freezer and refrigerator according to claim 6, characterized in that: The input branch also includes a protection capacitor, one end of which is connected between the input current limiting resistor and the input interface, and the other end of which is grounded.

8. The method for using the control system of the temperature controller input interface of a freezer and refrigerator according to any one of claims 1 to 7, characterized in that: The steps include: The user switches the working mode of the function configuration module according to the type of peripherals to be connected to the thermostat; the working mode includes a digital mode and an analog mode; the type of peripherals to be connected to the thermostat includes a digital peripheral and an analog peripheral. Wherein, when the function configuration module is in digital mode, the function configuration module provides a large current rust removal function for the corresponding input branch; When the function configuration module is in the analog mode, the control module receives the configuration parameters of the analog configuration interface and filters the corresponding analog peripherals.

9. The method for using the control system of the temperature controller input interface of a freezer and refrigerator according to claim 8, characterized in that: The user switches the working mode of the function configuration module according to the type of peripheral device to be connected to the thermostat, including: When the type of the peripheral to be connected to the temperature controller is a digital peripheral, the corresponding peripheral is connected to the corresponding input interface connected to the function configuration module, and a low level is input to the function configuration module to put the function configuration module in digital mode; When the types of peripherals to be connected to the temperature controller are all analog peripherals, a high level is input to the function configuration module to put the function configuration module in analog mode.

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