CN205120218U - Automatic refrigerant weighing system of high accuracy - Google Patents
Automatic refrigerant weighing system of high accuracy Download PDFInfo
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- CN205120218U CN205120218U CN201520923567.6U CN201520923567U CN205120218U CN 205120218 U CN205120218 U CN 205120218U CN 201520923567 U CN201520923567 U CN 201520923567U CN 205120218 U CN205120218 U CN 205120218U
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 34
- 238000005303 weighing Methods 0.000 title claims abstract description 21
- 230000003750 conditioning effect Effects 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
本实用新型公开了一种高精度自动冷媒称量系统，包括微控制器、输入输出模块、存储模块、称重传感器、信号调理电路、阀门驱动电路和电动阀门，称重传感器经信号调理电路与微控制器连接，电动阀门经阀门驱动电路与微控制器连接，输入输出模块和存储模块分别连接微控制器，冷媒容器连接送气管并置于称重传感器上；称重传感器采集冷媒容器的重量信号，信号经信号调理电路处理后传送给微控制器，微控制器根据当前重量信号生成驱动指令并传送给阀门驱动电路，阀门驱动电路根据驱动指令控制电动阀门运转，从而改变送气管的输送流量。本实用新型实现了冷媒灌装的自动化控制，并解决了精度低的问题。
The utility model discloses a high-precision automatic refrigerant weighing system, which includes a microcontroller, an input and output module, a storage module, a weighing sensor, a signal conditioning circuit, a valve driving circuit and an electric valve. The microcontroller is connected, the electric valve is connected to the microcontroller through the valve drive circuit, the input and output modules and the storage module are respectively connected to the microcontroller, the refrigerant container is connected to the air supply pipe and placed on the load cell; the load cell collects the weight of the refrigerant container The signal is processed by the signal conditioning circuit and sent to the microcontroller. The microcontroller generates a drive command according to the current weight signal and transmits it to the valve drive circuit. The valve drive circuit controls the operation of the electric valve according to the drive command, thereby changing the delivery flow of the air supply pipe. . The utility model realizes automatic control of refrigerant filling and solves the problem of low precision.
Description
技术领域 technical field
本实用新型属于自动化控制领域，特别涉及了一种高精度自动冷媒称量系统。 The utility model belongs to the field of automatic control, in particular to a high-precision automatic refrigerant weighing system.
背景技术 Background technique
对于冷媒的携带运输，大型的冷媒储藏设备并不适合，通常需要对冷媒进行灌装，所以需要一种能够便于携带运输的小型冷媒罐，以此作为冷媒的传输媒介。有些厂家采用人工称量，十分费时费力，而且称量重量不容易控制，精确度很难保证。而有些则采用公开号为CN101581520A、CN103090937A、CN2246234Y、CN101761772A的专利或专利申请文件所介绍的自动称量加液系统，虽然满足了自动化称量功能，但是这些文件均采用电磁阀作为输出控制，电磁阀只能输出开关量，无法对流量进行精准控制，并且均未采用控制方法进行优化，导致称量精度并不理想，容易造成污染和浪费。 For the transportation of refrigerant, large-scale refrigerant storage equipment is not suitable, and the refrigerant usually needs to be filled, so a small refrigerant tank that is easy to carry and transport is needed as a refrigerant transmission medium. Some manufacturers use manual weighing, which is very time-consuming and laborious, and the weighing weight is not easy to control, and the accuracy is difficult to guarantee. And some of them adopt the automatic weighing and adding liquid system introduced by patents or patent application documents whose publication numbers are CN101581520A, CN103090937A, CN2246234Y, CN101761772A. The valve can only output the switching value, and cannot accurately control the flow rate, and the control method is not used to optimize it, resulting in unsatisfactory weighing accuracy, which is easy to cause pollution and waste.
实用新型内容 Utility model content
为了解决上述背景技术提出的技术问题，本实用新型旨在提供一种高精度自动冷媒称量系统，实现了自动化控制冷媒灌装，并解决了精度低的问题。 In order to solve the technical problems raised by the above-mentioned background technology, the utility model aims to provide a high-precision automatic refrigerant weighing system, which realizes automatic control of refrigerant filling and solves the problem of low precision.
为了实现上述技术目的，本实用新型的技术方案为： In order to realize above-mentioned technical purpose, the technical scheme of the utility model is:
一种高精度自动冷媒称量系统，包括微控制器、输入输出模块、存储模块、称重传感器、信号调理电路、阀门驱动电路和电动阀门，所述称重传感器经信号调理电路与微控制器连接，所述电动阀门经阀门驱动电路与微控制器连接，所述输入输出模块和存储模块分别连接微控制器，冷媒容器连接送气管并置于称重传感器上；所述称重传感器采集冷媒容器的重量信号，信号经信号调理电路处理后传送给微控制器，微控制器根据当前重量信号生成驱动指令并传送给阀门驱动电路，阀门驱动电路根据驱动指令控制电动阀门运转，从而改变送气管的输送流量。 A high-precision automatic refrigerant weighing system, including a microcontroller, an input and output module, a storage module, a load cell, a signal conditioning circuit, a valve drive circuit and an electric valve, the load sensor is connected to the microcontroller through the signal conditioning circuit connected, the electric valve is connected to the microcontroller through the valve drive circuit, the input and output modules and the storage module are respectively connected to the microcontroller, the refrigerant container is connected to the air supply pipe and placed on the load cell; the load cell collects the refrigerant The weight signal of the container is sent to the microcontroller after being processed by the signal conditioning circuit. The microcontroller generates a driving instruction according to the current weight signal and sends it to the valve driving circuit. The valve driving circuit controls the operation of the electric valve according to the driving instruction, thereby changing the air supply pipe delivery flow.
其中，所述信号调理电路包括信号放大器和模数转换器，所述信号放大器的输入端连接称重传感器，信号放大器的输出端连接模数转换器的输入端，模数转换器的输出端连接微控制器。 Wherein, the signal conditioning circuit includes a signal amplifier and an analog-to-digital converter, the input of the signal amplifier is connected to the load cell, the output of the signal amplifier is connected to the input of the analog-to-digital converter, and the output of the analog-to-digital converter is connected to microcontroller.
基于上述技术方案的一种优选方案，所述称重传感器采用S型称重传感器。 Based on a preferred solution of the above technical solution, the load cell is an S-type load cell.
基于上述技术方案的一种优选方案，所述微控制器采用单片机。 Based on a preferred solution of the above technical solution, the microcontroller adopts a single-chip microcomputer.
基于上述技术方案的一种优选方案，所述输入输出模块为触摸屏。 Based on a preferred solution of the above technical solution, the input and output module is a touch screen.
采用上述技术方案带来的有益效果： The beneficial effect brought by adopting the above-mentioned technical scheme:
（1）本实用新型采用电动阀门来控制冷媒的充注，并根据冷媒重量来分段控制电动阀门的开度，从而实现高精度称量，在满量程为50kg的情况下，精度高达0.01kg； (1) The utility model uses an electric valve to control the filling of the refrigerant, and controls the opening of the electric valve in sections according to the weight of the refrigerant, thereby realizing high-precision weighing. When the full scale is 50kg, the accuracy is as high as 0.01kg ;
（2）本实用新型能够自动控制称量量，计量精度很高，不受钢瓶大小重量的影响，不仅适用于冷媒称量，也可用于其他高压液体称量； (2) The utility model can automatically control the weighing amount, the measuring accuracy is very high, and it is not affected by the size and weight of the steel cylinder. It is not only suitable for refrigerant weighing, but also for other high-pressure liquid weighing;
（3）本实用新型的装置均采用集成芯片构成，方便携带且易于操作。 (3) The devices of the present utility model are all composed of integrated chips, which are convenient to carry and easy to operate.
附图说明 Description of drawings
图1是本实用新型的系统组成框图。 Fig. 1 is a system composition block diagram of the present utility model.
具体实施方式 detailed description
以下将结合附图，对本实用新型的技术方案进行详细说明。 The technical solutions of the present utility model will be described in detail below in conjunction with the accompanying drawings.
如图1所示本实用新型的系统组成框图，一种高精度自动冷媒称量系统，包括微控制器、输入输出模块、存储模块、称重传感器、信号调理电路、阀门驱动电路和电动阀门，所述称重传感器经信号调理电路与微控制器连接，所述电动阀门经阀门驱动电路与微控制器连接，所述输入输出模块和存储模块分别连接微控制器，冷媒容器连接送气管并置于称重传感器上；所述称重传感器采集冷媒容器的重量信号，信号经信号调理电路处理后传送给微控制器，微控制器根据当前重量信号生成驱动指令并传送给阀门驱动电路，阀门驱动电路根据驱动指令控制电动阀门运转，从而改变送气管的输送流量。 As shown in Figure 1, the system composition block diagram of the utility model is a high-precision automatic refrigerant weighing system, including a microcontroller, an input and output module, a storage module, a load cell, a signal conditioning circuit, a valve drive circuit and an electric valve, The load cell is connected to the microcontroller through a signal conditioning circuit, the electric valve is connected to the microcontroller through a valve drive circuit, the input and output modules and the storage module are respectively connected to the microcontroller, and the refrigerant container is connected to the air supply pipe and placed side by side. on the load cell; the load cell collects the weight signal of the refrigerant container, and the signal is processed by the signal conditioning circuit and sent to the microcontroller, and the microcontroller generates a driving command according to the current weight signal and sends it to the valve drive circuit, and the valve drives The electric circuit controls the operation of the electric valve according to the driving instruction, thereby changing the conveying flow of the air supply pipe.
在本实施例中，所述信号调理电路包括信号放大器和模数转换器，所述信号放大器的输入端连接称重传感器，信号放大器的输出端连接模数转换器的输入端，模数转换器的输出端连接微控制器。 In this embodiment, the signal conditioning circuit includes a signal amplifier and an analog-to-digital converter, the input of the signal amplifier is connected to the load cell, the output of the signal amplifier is connected to the input of the analog-to-digital converter, and the analog-to-digital converter The output terminal is connected to the microcontroller.
在本实施例中，所述称重传感器采用S型称重传感器。 In this embodiment, the load cell is an S-type load cell.
在本实施例中，所述微控制器采用单片机。 In this embodiment, the microcontroller is a single chip microcomputer.
在本实施例中，所述输入输出模块为触摸屏。 In this embodiment, the input and output module is a touch screen.
本实用新型的工作原理： Working principle of the utility model:
在冷媒灌装之前，称重传感器测量冷媒容器本身的重量，并将该重量信号通过信号调理电路传送给微控制器，微控制器将该冷媒容器的重量数据存入存储模块。然后通过输入输出模块设置微控制器的控制参数，包括目标重量。之后向容器充注冷媒，称重传感器不断采集当前重量并传送给微控制器，微控制器将当前时刻的重量减去容器本身重量后的重量值与设定的目标重量比较，根据比较结果生成相应的驱动指令，当两者差值逐渐减小时，阀门驱动电路根据驱动指令控制电动阀门的开度也随之逐渐减小，从而实现实时、精确的冷媒充注。 Before the refrigerant is filled, the weighing sensor measures the weight of the refrigerant container itself, and transmits the weight signal to the microcontroller through the signal conditioning circuit, and the microcontroller stores the weight data of the refrigerant container into the storage module. The microcontroller's control parameters, including the target weight, are then set through the input-output module. Afterwards, the container is filled with refrigerant, and the load cell continuously collects the current weight and transmits it to the microcontroller. The microcontroller compares the weight value at the current moment minus the weight of the container itself with the set target weight, and generates Corresponding to the drive command, when the difference between the two gradually decreases, the valve drive circuit controls the opening of the electric valve according to the drive command to gradually decrease, thereby realizing real-time and accurate refrigerant charging.
实现以上实施例仅为说明本实用新型的技术思想，不能以此限定本实用新型的保护范围，凡是按照本实用新型提出的技术思想，在技术方案基础上所做的任何改动，均落入本实用新型保护范围之内。 The realization of the above embodiments is only to illustrate the technical ideas of the present utility model, and the protection scope of the present utility model cannot be limited with this. Any changes made on the basis of the technical solutions according to the technical ideas proposed by the utility model all fall within the scope of this utility model. within the scope of utility model protection.
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| CN201520923567.6U CN205120218U (en) | 2015-11-19 | 2015-11-19 | Automatic refrigerant weighing system of high accuracy |
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| CN201520923567.6U CN205120218U (en) | 2015-11-19 | 2015-11-19 | Automatic refrigerant weighing system of high accuracy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108981879A (en) * | 2018-08-28 | 2018-12-11 | 江苏省精创电气股份有限公司 | A kind of portable coolant injection weighing tool and its control method |
| CN112439364A (en) * | 2020-12-04 | 2021-03-05 | 浙江中控技术股份有限公司 | High-precision automatic liquid feeding device and method |
-
2015
- 2015-11-19 CN CN201520923567.6U patent/CN205120218U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108981879A (en) * | 2018-08-28 | 2018-12-11 | 江苏省精创电气股份有限公司 | A kind of portable coolant injection weighing tool and its control method |
| CN112439364A (en) * | 2020-12-04 | 2021-03-05 | 浙江中控技术股份有限公司 | High-precision automatic liquid feeding device and method |
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