Refrigerant detection device operating in wide voltage environment and refrigeration device

Abstract

The application relates to the technical field of gas safety detection equipment, and discloses a refrigerant detection device working in a wide voltage environment and a refrigeration device. The refrigerant detection device working in the wide voltage environment comprises a shell and a circuit board arranged in the shell, the circuit board is integrated with a power conversion module, a refrigerant sensor and a signal processing module; the power conversion module is used for receiving external direct-current input voltage and converting the direct-current input voltage into a direct-current working voltage input into the refrigerant sensor, the direct-current working voltage is a rated working voltage of the refrigerant sensor; the refrigerant sensor is used for generating a concentration electric signal according to the refrigerant concentration in the environment and transmitting the concentration electric signal to the signal processing module; and the signal processing module is used for generating a refrigerant concentration detection result according to the concentration electric signal. The refrigerant detection device working in the wide voltage environment and the refrigeration device provided by the application can realize the technical effect of reducing refrigerant detection cost and wiring complexity and being suitable for wide applications.

Description

Technical Field

[0001] This application relates to the technical field of gas safety detection equipment, specifically to a refrigerant detection device and a refrigeration device that operate under a wide voltage environment. Background Technology

[0002] Refrigerant leakage is a common fault in refrigeration and air conditioning systems. It not only affects system efficiency, but also poses a risk of combustion and explosion for some flammable refrigerants (such as R290 and R32). Therefore, reliable detection devices are needed to monitor whether refrigerant is leaking.

[0003] Existing refrigerant detection modules typically require a stable supply voltage (such as 12V or 24V). However, in practical applications, such as air conditioning systems in electric vehicles, mobile refrigeration equipment, or industrial sites, the supply voltage fluctuates dramatically (e.g., car battery voltage varies between 9V and 36V). This fluctuation can easily cause traditional detection modules to malfunction, produce distorted measurement data, or even be damaged by overvoltage or surges, significantly reducing their reliability.

[0004] Currently, the common practice to address voltage adaptation issues is to connect a separate switching power adapter to the refrigerant detection module. This approach increases system cost and wiring complexity, reduces the applicability of the refrigerant detection module, and introduces new potential points of failure. Therefore, there is an urgent need for a refrigerant detection module that is cost-effective, has low wiring complexity, and is highly adaptable. Utility Model Content

[0005] In view of this, it is necessary to provide a refrigerant detection device and a refrigeration device that operate under a wide voltage environment, so as to achieve the technical effect of reducing the cost of refrigerant detection and wiring complexity, and having strong applicability.

[0006] To address the aforementioned technical problems, in a first aspect, this application provides a refrigerant detection device operating under a wide voltage environment, comprising: The housing and a circuit board disposed within the housing, the circuit board integrating a power conversion module, a refrigerant sensor and a signal processing module; The power conversion module is used to receive an external DC input voltage and convert the external DC input voltage into a DC operating voltage for input to the refrigerant sensor. The DC operating voltage is the rated operating voltage of the refrigerant sensor. The refrigerant sensor is used to generate a concentration electrical signal based on the refrigerant concentration in the environment and transmit it to the signal processing module; The signal processing module is used to generate refrigerant concentration detection results based on the concentration electrical signal.

[0007] In one possible embodiment, the power conversion module includes an input protection circuit and a DC-DC buck regulator circuit that are connected in sequence. The input protection circuit is used to protect the DC-DC buck regulator circuit, which is used to convert the external DC input voltage into the DC operating voltage.

[0008] In one possible embodiment, the input protection circuit includes a transient voltage suppressor diode and a fuse, wherein the transient voltage suppressor diode is used to provide overvoltage protection for the DC-DC buck regulator circuit, and the fuse is used to provide overcurrent protection for the DC-DC buck regulator circuit.

[0009] In one possible embodiment, the DC-DC buck regulator circuit supports a wide DC voltage input from 6V to 40V.

[0010] In one possible embodiment, the refrigerant sensor is one of a non-dispersive infrared sensor, an electrochemical sensor, and a semiconductor sensor.

[0011] In one possible embodiment, the signal processing module includes an operational amplifier and a microcontroller, wherein the input terminal of the operational amplifier is connected to the refrigerant sensor, and the output terminal of the operational amplifier is connected to the microcontroller. The operational amplifier is used to amplify the concentration electrical signal and transmit it to the microcontroller, which then generates the refrigerant concentration detection result based on the amplified concentration electrical signal.

[0012] In one possible embodiment, it further includes: a temperature sensor integrated on the circuit board for detecting ambient temperature, the temperature sensor being connected to the microcontroller, the microcontroller being used to generate the refrigerant concentration detection result based on the ambient temperature and the concentration electrical signal.

[0013] In one possible embodiment, the microcontroller includes a high-precision analog-to-digital converter.

[0014] In one possible embodiment, it further includes: an output interface integrated on the circuit board and connected to the signal processing module, the output interface being used to transmit the refrigerant concentration detection result to the outside; The output interface includes one or more of the following: a 4-20mA current loop output interface, a 0-5V voltage output interface, a UART serial port, and an RS485 interface.

[0015] Secondly, this application provides a refrigeration device, comprising: A refrigeration module for refrigeration, the refrigeration module including a refrigerant; The refrigerant detection device operating under a wide voltage environment as described in any of the above implementations is used to detect whether the refrigerant is leaking.

[0016] The beneficial effects of this application include: Compared with related technologies, the refrigerant detection device and refrigeration device that operate under a wide voltage environment provided in this application integrate a power conversion module in the circuit board of the refrigerant detection device. The power conversion module receives an external DC input voltage and converts the external wide-voltage range DC input voltage into a DC operating voltage for input to the refrigerant sensor. The DC operating voltage is the rated operating voltage of the refrigerant sensor, that is, a low-voltage DC voltage that allows the refrigerant sensor to operate normally, safely and stably. This allows the refrigerant detection device to operate under a wide voltage environment without the need for an external independent switching power adapter, achieving the technical effect of reducing refrigerant detection costs and wiring complexity, and having strong applicability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a refrigerant detection device operating under a wide voltage environment according to an embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the circuit structure of the medium power conversion module; Figure 3 This is a schematic diagram of the structure of a refrigeration device provided in one embodiment of this application. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0020] In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0021] The terms "first," "second," etc., used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a technical feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0022] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] This application provides a refrigerant detection device and a refrigeration device that operate under a wide voltage environment, which will be described below.

[0024] Please refer to Figure 1 This application provides a refrigerant detection device that operates under a wide voltage environment, specifically including: a housing 10 and a circuit board 20 disposed within the housing 10. The circuit board 20 integrates a power conversion module 30, a refrigerant sensor 40, and a signal processing module 50. The power conversion module receives an external DC input voltage and converts it into a DC operating voltage, which is then input to the refrigerant sensor 40. The DC operating voltage is the rated operating voltage of the refrigerant sensor 40. The refrigerant sensor 40 generates a concentration electrical signal based on the refrigerant concentration in the environment and transmits it to the signal processing module 50. The signal processing module 50 generates a refrigerant concentration detection result based on the concentration electrical signal.

[0025] Specifically, in this embodiment, the power conversion module 30 includes an input protection circuit 301 and a DC-DC buck regulator circuit 302 connected in sequence; the input protection circuit 301 is used to protect the DC-DC buck regulator circuit 302, and the DC-DC buck regulator circuit 302 is used to convert the external DC input voltage into a DC operating voltage.

[0026] For further details, please refer to Figure 2 In this embodiment, the input protection circuit 301 includes a transient voltage suppression diode (TVS) and a fuse (in this embodiment, the number of fuses can be multiple, such as...). Figure 2 As shown in F1 and F2, transient voltage suppression diodes are used to provide overvoltage protection for the DC-DC buck regulator circuit 302, and fuses are used to provide overcurrent protection for the DC-DC buck regulator circuit 302.

[0027] In this embodiment, the input protection circuit 301 further includes an external DC input voltage interface VIN, an inductor L1, and multiple filter capacitors (including C1, C2, C3, and C4). The DC-DC buck regulator circuit 302 includes a DC-DC buck chip U1, an output filter inductor L2, voltage divider feedback resistors R1 and R2, a load resistor R3, a compensation capacitor C5, output filter capacitors C6 and C7, and a rated operating voltage output interface Vout.

[0028] like Figure 2 As shown, the external DC input voltage is input from the external DC input voltage interface VIN, and after passing through the fuse F1 and inductor L1, it is input to the DC-DC buck chip U1 in the DC-DC buck regulator circuit 302. During this process, the transient voltage suppression diode TVS provides overvoltage protection. That is, when the external DC input voltage is greater than the safe voltage, the transient voltage suppression diode TVS disconnects the subsequent circuit, improving the safety of the power conversion module 30. After being stepped down by the DC-DC buck chip U1, the voltage is output to the output filter inductor L2, the voltage divider feedback resistors R1 and R2, the load resistor R3, the compensation capacitor C5, and the output filter capacitors C6 and C7, thus reducing the external DC input voltage to obtain the rated operating voltage, which is output from the rated operating voltage output interface Vout.

[0029] Furthermore, in this embodiment, the DC-DC buck regulator circuit 302 supports a wide DC voltage input from 6V to 40V.

[0030] Specifically, in this embodiment, the refrigerant sensor 40 is one of a non-dispersive infrared sensor, an electrochemical sensor, and a semiconductor sensor, which can be configured according to the application scenario of the refrigerant detection device. The core of the semiconductor sensor is a layer of metal oxide semiconductor (usually tin dioxide, SnO2). When refrigerant gas is adsorbed onto the semiconductor surface, it undergoes a chemical reaction with the semiconductor, changing its conductivity (resistance). By measuring the change in resistance, a corresponding concentration electrical signal can be output to the signal processing module 50. The non-dispersive infrared sensor is based on non-dispersive infrared technology. Each gas molecule has unique absorption characteristics for infrared light of a specific wavelength. The sensor contains an infrared light source and a detector. When light passes through the gas being measured, light of a specific wavelength is absorbed by the refrigerant. By measuring the degree of light intensity attenuation, a corresponding concentration electrical signal can be output to the signal processing module 50. The electrochemical sensor contains an electrolyte. The refrigerant gas diffuses into the electrolyte through a diaphragm, undergoing oxidation or reduction reactions on the sensing electrodes, generating a concentration electrical signal proportional to the gas concentration, which is then sent to the signal processing module 50.

[0031] Specifically, the signal processing module 50 includes an operational amplifier and a microcontroller. The microcontroller includes a high-precision analog-to-digital converter. The input terminal of the operational amplifier is connected to the refrigerant sensor 40, and the output terminal of the operational amplifier is connected to the microcontroller. The operational amplifier is used to amplify the concentration electrical signal and transmit it to the microcontroller. The microcontroller is used to generate a refrigerant concentration detection result based on the amplified concentration electrical signal.

[0032] Please continue to refer to Figure 1 In this embodiment, a temperature sensor 60 integrated on the circuit board 20 for detecting ambient temperature is also included. The temperature sensor 60 is connected to a microcontroller, which generates a refrigerant concentration detection result based on the ambient temperature and concentration electrical signal.

[0033] Specifically, in the microcontroller, the concentration electrical signal of the refrigerant sensor 40 is substituted into its basic calibration curve (usually a curve calibrated at a standard laboratory temperature, such as 25°C). An uncompensated initial concentration value, Craw, is calculated. For example, the initial concentration value Craw is calculated according to the formula: Craw = G × Vout + Coffset, where Vout is the concentration electrical signal of the refrigerant sensor 40, G is a constant gain coefficient, and Coffset is the zero-point offset. Then, a temperature compensation function f(T) is introduced. The temperature compensation function is usually obtained by fitting data after calibrating the refrigerant sensor 40 at multiple different temperatures. The temperature compensation function is specifically a polynomial function. The compensated concentration Ccompensated = Craw × f(T) is calculated according to the temperature compensation function, where T is the ambient temperature measured by the temperature sensor 60.

[0034] Please continue to refer to Figure 2 In this embodiment, an output interface 70 is also integrated on the circuit board 20 and connected to the signal processing module 50. The output interface 70 is used to transmit the refrigerant concentration detection results to the outside. The output interface includes one or more of the following: a 4-20mA current loop output interface, a 0-5V voltage output interface, a UART serial port, and an RS485 interface.

[0035] Compared with related technologies, the refrigerant detection device operating under a wide voltage environment provided in this embodiment integrates a power conversion module 30 in the circuit board 20 of the refrigerant detection device. The power conversion module 30 receives the external DC input voltage and converts the external wide-voltage range DC input voltage into a DC operating voltage for input to the refrigerant sensor 40. The DC operating voltage is the rated operating voltage of the refrigerant sensor 40, that is, the low-voltage DC voltage that allows the refrigerant sensor 40 to operate normally, safely and stably. This allows the refrigerant detection device to operate under a wide voltage environment without the need for an external independent switching power adapter, achieving the technical effect of reducing refrigerant detection costs and wiring complexity, and having strong applicability.

[0036] Please refer to Figure 3 This application also provides a refrigeration device, including: a refrigeration module 301 for refrigeration, the refrigeration module including a refrigerant; and a refrigerant detection device 302 operating under a wide voltage environment as provided in the foregoing embodiments, the refrigerant detection device 302 operating under a wide voltage environment being used to detect whether the refrigerant is leaking.

[0037] The above provides a detailed description of the construction site violation identification method, device, electronic equipment, and storage medium provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A refrigerant detection device operating under a wide voltage environment, characterized in that, include: The housing and a circuit board disposed within the housing, the circuit board integrating a power conversion module, a refrigerant sensor and a signal processing module; The power conversion module is used to receive an external DC input voltage and convert the external DC input voltage into a DC operating voltage for input to the refrigerant sensor. The DC operating voltage is the rated operating voltage of the refrigerant sensor. The refrigerant sensor is used to generate a concentration electrical signal based on the refrigerant concentration in the environment and transmit it to the signal processing module; The signal processing module is used to generate refrigerant concentration detection results based on the concentration electrical signal.

2. The refrigerant detection device operating under a wide voltage environment according to claim 1, characterized in that, The power conversion module includes an input protection circuit and a DC-DC buck regulator circuit that are connected in sequence. The input protection circuit is used to protect the DC-DC buck regulator circuit, which is used to convert the external DC input voltage into the DC operating voltage.

3. The refrigerant detection device operating under a wide voltage environment according to claim 2, characterized in that, The input protection circuit includes a transient voltage suppression diode and a fuse. The transient voltage suppression diode is used to provide overvoltage protection for the DC-DC buck regulator circuit, and the fuse is used to provide overcurrent protection for the DC-DC buck regulator circuit.

4. The refrigerant detection device operating under a wide voltage environment according to claim 2, characterized in that, The DC-DC buck regulator circuit supports a wide DC voltage input from 6V to 40V.

5. The refrigerant detection device operating under a wide voltage environment according to claim 1, characterized in that, The refrigerant sensor is one of a non-dispersive infrared sensor, an electrochemical sensor, or a semiconductor sensor.

6. The refrigerant detection device operating under a wide voltage environment according to claim 1, characterized in that, The signal processing module includes an operational amplifier and a microcontroller. The input terminal of the operational amplifier is connected to the refrigerant sensor, and the output terminal of the operational amplifier is connected to the microcontroller. The operational amplifier is used to amplify the concentration electrical signal and transmit it to the microcontroller, which then generates the refrigerant concentration detection result based on the amplified concentration electrical signal.

7. The refrigerant detection device operating under a wide voltage environment according to claim 6, characterized in that, Also includes: A temperature sensor integrated on the circuit board for detecting ambient temperature is connected to the microcontroller, which generates the refrigerant concentration detection result based on the ambient temperature and the concentration electrical signal.

8. The refrigerant detection device operating under a wide voltage environment according to claim 6, characterized in that, The microcontroller includes a high-precision analog-to-digital converter.

9. The refrigerant detection device operating under a wide voltage environment according to claim 1, characterized in that, Also includes: An output interface integrated into the circuit board and connected to the signal processing module is used to transmit the refrigerant concentration detection result to the outside. The output interface includes one or more of the following: a 4-20mA current loop output interface, a 0-5V voltage output interface, a UART serial port, and an RS485 interface.

10. A refrigeration device, characterized in that, include: A refrigeration module for refrigeration, the refrigeration module including a refrigerant; The refrigerant detection device operating under a wide voltage environment as described in any one of claims 1 to 9 is used to detect whether the refrigerant is leaking.

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