CN106337826A - Speed regulating system and refrigerating container with speed regulating system - Google Patents
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Abstract
本发明公开了一种调速系统及具有其的冷藏集装箱。调速系统用于调节冷藏集装箱的冷机的蒸发器风扇的速度，包括：主控制单元、通信单元、变频器、高低档信号采集开关以及伪负载。通信单元与主控制单元电连接；变频器经由通信单元与主控制单元电连接，变频器根据主控制单元的信号调整蒸发器风扇的速度；高低档信号采集开关采集冷机当前的档位状态并将冷机当前的档位状态传递至主控制单元；伪负载与冷机连接，以防止冷机报错。能够改变现有冷藏集装箱冷机的蒸发器风扇只有高低两档的情况，使用变频器控制蒸发器风扇的转速，从而实现蒸发器风扇的无级调速，进而改变冷藏集装箱箱体内部的风量数值，实现冷藏集装箱内部环境的精确调控。
The invention discloses a speed regulating system and a refrigerated container with the same. The speed control system is used to adjust the speed of the evaporator fan of the refrigerator of the refrigerated container, including: the main control unit, the communication unit, the frequency converter, the high and low gear signal acquisition switch and the pseudo load. The communication unit is electrically connected to the main control unit; the frequency converter is electrically connected to the main control unit through the communication unit, and the frequency converter adjusts the speed of the evaporator fan according to the signal from the main control unit; the high and low gear signal acquisition switch collects the current gear status of the refrigerator and The current gear status of the cold machine is transmitted to the main control unit; the dummy load is connected to the cold machine to prevent the cold machine from reporting an error. It can change the situation that the evaporator fan of the existing refrigerated container refrigerator has only two high and low gears, and use the frequency converter to control the speed of the evaporator fan, so as to realize the stepless speed regulation of the evaporator fan, and then change the air volume value inside the refrigerated container box , to achieve precise control of the internal environment of the refrigerated container.
Description
技术领域technical field
本发明涉及集装箱领域，尤其涉及一种调速系统及具有其的冷藏集装箱。The invention relates to the field of containers, in particular to a speed regulating system and a refrigerated container having the same.
背景技术Background technique
当前使用的冷藏集装箱都配备了用来调节冷箱内温度的冷机，冷机的蒸发器风扇的转速由冷机控制器来操控，现有的冷机蒸发器风扇的转速都分为高低两档，不具备调速功能。但是在一些特定的场合，比如果蔬的运输，还需要能调节冷藏集装箱箱内的风量，使得易变质的果蔬农产品能够在环境适宜的情况下运输。The currently used refrigerated containers are all equipped with a cooler for adjusting the temperature inside the cooler. The speed of the evaporator fan of the cooler is controlled by the controller of the cooler. The speed of the evaporator fan of the existing cooler is divided into high and low. file, does not have the function of speed regulation. However, in some specific occasions, such as the transportation of fruits and vegetables, it is necessary to be able to adjust the air volume in the refrigerated container so that the perishable agricultural products of fruits and vegetables can be transported under a suitable environment.
发明内容Contents of the invention
在发明内容部分中引入了一系列简化形式的概念，这将在具体实施方式部分中进一步详细说明。本发明的发明内容部分并不意味着要试图限定出所要求保护的技术方案的关键特征和必要技术特征，更不意味着试图确定所要求保护的技术方案的保护范围。A series of concepts in simplified form are introduced in the Summary of the Invention, which will be further detailed in the Detailed Description. The summary of the invention in the present invention does not mean to limit the key features and essential technical features of the claimed technical solution, nor does it mean to try to determine the protection scope of the claimed technical solution.
为了解决上述问题，本发明公开了一种调速系统，用于调节冷机的蒸发器风扇的速度，其特征在于，包括：In order to solve the above problems, the present invention discloses a speed regulating system for regulating the speed of the evaporator fan of the refrigerator, which is characterized in that it includes:
主控制单元；main control unit;
通信单元，所述通信单元与所述主控制单元电连接；a communication unit, the communication unit is electrically connected to the main control unit;
变频器；所述变频器经由所述通信单元与所述主控制单元电连接，所述变频器根据所述主控制单元的信号调整所述蒸发器风扇的速度；A frequency converter; the frequency converter is electrically connected to the main control unit via the communication unit, and the frequency converter adjusts the speed of the evaporator fan according to a signal from the main control unit;
高低档信号采集开关，所述高低档信号采集开关采集所述冷机当前的档位状态并将所述冷机当前的档位状态传递至所述主控制单元；以及A high and low gear signal acquisition switch, the high and low gear signal acquisition switch collects the current gear state of the refrigerator and transmits the current gear state of the refrigerator to the main control unit; and
伪负载，所述伪负载与所述冷机连接，以防止所述冷机报错。A dummy load, the dummy load is connected to the cold machine to prevent the cold machine from reporting an error.
可选地，所述伪负载包括高速伪负载和低速伪负载，当所述冷机处于高速工作状态时，所述冷机经由高速伪负载接触器与所述高速伪负载连接，当所述冷机处于低速工作状态时，所述冷机经由低速伪负载接触器与所述低速伪负载连接。Optionally, the dummy load includes a high-speed dummy load and a low-speed dummy load. When the cold machine is in a high-speed working state, the cold machine is connected to the high-speed dummy load via a high-speed dummy load contactor. When the cold machine is in a low-speed working state, the cold machine is connected to the low-speed dummy load via a low-speed dummy load contactor.
可选地，所述通信单元为有线通信电路或无线通信模块。Optionally, the communication unit is a wired communication circuit or a wireless communication module.
可选地，所述有线通信电路为RS485总线、RS232总线或CAN总线。Optionally, the wired communication circuit is RS485 bus, RS232 bus or CAN bus.
可选地，所述伪负载为电感性负载或电阻性负载。Optionally, the dummy load is an inductive load or a resistive load.
本发明还公开了一种冷藏集装箱，其包括上述的调速系统。The invention also discloses a refrigerated container, which includes the above-mentioned speed regulating system.
根据本发明的调速系统，包括：主控制单元、通信单元、变频器、高低档信号采集开关以及伪负载。能够改变现有冷藏集装箱冷机的蒸发器风扇只有高低两档的情况，使用变频器控制蒸发器风扇的转速，从而实现蒸发器风扇的无级调速，进而改变冷藏集装箱箱体内部的风量数值，实现冷藏集装箱内部环境的精确调控。The speed regulating system according to the present invention includes: a main control unit, a communication unit, a frequency converter, a high-low gear signal acquisition switch and a dummy load. It can change the situation that the evaporator fan of the existing refrigerated container refrigerator has only two high and low gears, and use the frequency converter to control the speed of the evaporator fan, so as to realize the stepless speed regulation of the evaporator fan, and then change the air volume value inside the refrigerated container box , to achieve precise control of the internal environment of the refrigerated container.
附图说明Description of drawings
本发明实施方式的下列附图在此作为本发明的一部分用于理解本发明。附图中示出了本发明的实施方式及其描述，用来解释本发明的原理。在附图中，The following drawings of the embodiments of the present invention are hereby included as part of the present invention for understanding the present invention. Embodiments of the present invention and description thereof are shown in the drawings to explain the principles of the present invention. In the attached picture,
图1为根据本发明的一种实施方式的调速系统的示意图；以及Figure 1 is a schematic diagram of a speed regulating system according to an embodiment of the present invention; and
图2为根据本发明的一种实施方式的调速系统的流程图。Fig. 2 is a flowchart of a speed regulating system according to an embodiment of the present invention.
具体实施方式detailed description
在下文的描述中，给出了大量具体的细节以便提供对本发明更为彻底的理解。然而，对于本领域技术人员来说显而易见的是，本发明实施方式可以无需一个或多个这些细节而得以实施。在其他的例子中，为了避免与本发明实施方式发生混淆，对于本领域公知的一些技术特征未进行描述。In the following description, numerous specific details are given in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that embodiments of the invention may be practiced without one or more of these details. In other examples, some technical features known in the art are not described in order to avoid confusion with the embodiments of the present invention.
为了彻底了解本发明实施方式，将在下列的描述中提出详细的结构。显然，本发明实施方式的施行并不限定于本领域的技术人员所熟习的特殊细节。本发明的较佳实施方式详细描述如下，然而除了这些详细描述外，本发明还可以具有其他实施方式。In order to thoroughly understand the embodiments of the present invention, a detailed structure will be set forth in the following description. It is evident that practice of the embodiments of the invention is not limited to specific details familiar to those skilled in the art. Preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments besides these detailed descriptions.
如图1所示，本发明的一种调速系统包括：主控制单元、通信单元、变频器、高低档信号采集开关以及伪负载。As shown in Fig. 1, a speed regulation system of the present invention includes: a main control unit, a communication unit, a frequency converter, a high and low gear signal acquisition switch and a dummy load.
具体地，主控制单元可以单片机，由于其成本较低，可以降低制造成本。主控制单元可包括输入端和输出端，主控制单元的输入端与高低档信号采集开关以及其他传感器等连接，主控制单元的输出端可经由变频器与蒸发器风扇连接。Specifically, the main control unit can be a single-chip microcomputer, which can reduce manufacturing costs due to its low cost. The main control unit may include an input terminal and an output terminal. The input terminal of the main control unit is connected to high and low gear signal acquisition switches and other sensors, and the output terminal of the main control unit may be connected to the evaporator fan via a frequency converter.
在一种可选实施方式中，主控制单元可采用有低功耗模式的STM32F103RBT6控制单元，本领域技术人员应当知道，主控制单元包含多个外设设备，其可用于负责诸如风量传感器的数据采集以及控制各种执行部件，并且能够和电源管理电路配合控制整个系统的功耗。In an optional implementation, the main control unit can adopt the STM32F103RBT6 control unit with low power consumption mode. Those skilled in the art should know that the main control unit includes multiple peripheral devices, which can be used to be responsible for data such as air flow sensor Acquisition and control of various execution components, and can cooperate with the power management circuit to control the power consumption of the entire system.
本实施方式中，通信单元与主控制单元电连接。可选地，通信单元可以为有线通信电路或无线通信模块。例如，有线通信电路可为RS485总线、RS232总线或CAN总线，而无线通信模块可以通过基站、WIFI等方式通信。In this embodiment, the communication unit is electrically connected to the main control unit. Optionally, the communication unit may be a wired communication circuit or a wireless communication module. For example, the wired communication circuit can be RS485 bus, RS232 bus or CAN bus, and the wireless communication module can communicate through base station, WIFI and other ways.
变频器经由诸如RS485总线的通信单元与主控制单元电连接。变频器根据主控制单元的信号精准地调整蒸发器风扇的速度。变频器是控制蒸发器风扇工作的关键部件，变频器的输出端连接蒸发器风扇的输入端，从而，改变变频器的输出量的值即可以改变蒸发器风扇输入量的值，并使蒸发器风扇实现无级变速。The frequency converter is electrically connected with the main control unit via a communication unit such as an RS485 bus. The frequency converter precisely adjusts the speed of the evaporator fan according to the signal from the main control unit. The frequency converter is the key component to control the work of the evaporator fan. The output terminal of the frequency converter is connected to the input terminal of the evaporator fan. Therefore, changing the output value of the frequency converter can change the input value of the evaporator fan, and the evaporator fan The fan realizes infinitely variable speed.
为了实现冷机系统工作电流的采集要求，在蒸发器风扇独立控制时，为避免冷机工作报错，可加入高速和低速状态下的两个负载。例如，当冷机系统高速档位工作时，由高速伪负载接触器自动启动高速伪负载，伪负载选择可以是电感性负载，也可以是电阻性负载。In order to meet the collection requirements of the working current of the chiller system, when the evaporator fan is independently controlled, two loads at high speed and low speed can be added to prevent the chiller from reporting errors. For example, when the cooling system works at high speed, the high-speed dummy load contactor automatically starts the high-speed dummy load, and the dummy load can be an inductive load or a resistive load.
在本实施方式中，需要把蒸发器风扇的电源线路从控制风扇高速低速旋转的接触器上取下，并接到变频器的电源控制端(输出端)，从而使得蒸发器风扇改为经由变频器控制。此时风机没有连接负载，若启动会报错。In this embodiment, it is necessary to remove the power line of the evaporator fan from the contactor that controls the fan's high-speed and low-speed rotation, and connect it to the power control terminal (output terminal) of the frequency converter, so that the evaporator fan can be replaced by a frequency converter. device control. At this time, the fan is not connected to the load, and an error will be reported if it is started.
因此，为了防止冷机工作时报错，冷机需要与伪负载连接。可选地，伪负载为电感性负载或电阻性负载。具体参考图1，伪负载包括高速伪负载和低速伪负载，当冷机处于高速工作状态(档位)时，冷机经由高速伪负载接触器与高速伪负载连接，当冷机处于低速工作状态(档位)时，冷机经由低速伪负载接触器与低速伪负载连接。Therefore, in order to prevent the cold machine from reporting an error when it is working, the cold machine needs to be connected to a dummy load. Optionally, the dummy load is an inductive load or a resistive load. Specifically referring to Figure 1, the dummy load includes a high-speed dummy load and a low-speed dummy load. When the chiller is in a high-speed working state (gear position), the chiller is connected to the high-speed dummy load via a high-speed dummy load contactor. When the chiller is in a low-speed working state (gear position), the cold machine is connected to the low-speed pseudo-load via the low-speed pseudo-load contactor.
高低档信号采集开关采集冷机当前的档位状态并将冷机当前的档位状态传递至主控制单元。例如，高档信号采集开关的一种实施方式可以为从高速伪负载接触器的辅助端子引出导线至主控制单元，当高速伪负载接触器导通时，高档信号采集开关可告知主控制单元冷机当前状态为高速档位，使得主控制单元知悉系统的工作状态。The high and low gear signal acquisition switch collects the current gear state of the refrigerator and transmits the current gear state of the refrigerator to the main control unit. For example, one implementation of the high-grade signal acquisition switch can lead the wires from the auxiliary terminal of the high-speed pseudo-load contactor to the main control unit. When the high-speed pseudo-load contactor is turned on, the high-grade signal acquisition switch can inform the main control unit The current state is a high-speed gear, so that the main control unit knows the working state of the system.
低档信号采集开关与高档信号采集开关类似，低档信号采集开关的一种实施方式可以为从低速伪负载接触器的辅助端子引出导线至主控制单元，当低速伪负载接触器导通时，低档信号采集开关可告知主控制单元冷机当前状态为低速档位，使得主控制单元知悉冷机的工作状态。The low-level signal acquisition switch is similar to the high-level signal acquisition switch. One implementation of the low-level signal acquisition switch can be to lead the wire from the auxiliary terminal of the low-speed pseudo-load contactor to the main control unit. When the low-speed pseudo-load contactor is turned on, the low-level signal The acquisition switch can inform the main control unit that the current state of the cold machine is a low-speed gear, so that the main control unit can know the working state of the cold machine.
根据本发明的调速系统，能够改变现有冷藏集装箱冷机的蒸发器风扇只有高低两档的情况，使用变频器控制蒸发器风扇的转速，从而实现蒸发器风扇的无级调速，进而改变冷藏集装箱箱体内部的风量数值，实现冷藏集装箱内部环境的精确调控。According to the speed control system of the present invention, it can change the situation that the evaporator fan of the existing refrigerated container cooler has only two high and low gears, and use a frequency converter to control the speed of the evaporator fan, thereby realizing stepless speed regulation of the evaporator fan, and then changing the speed of the evaporator fan. The air volume value inside the refrigerated container box realizes the precise control of the internal environment of the refrigerated container.
伪负载可为电感性负载或电阻性负载，例如电感性负载可为线圈，电阻性负载可为加热器。需要说明的是，伪负载可与冷机等容量设置，例如冷机的功率为1200W时，如选用电感性负载，则电感性负载的容量为1200VA，而如果选用电阻性负载，电阻热功率为1200W。The dummy load can be an inductive load or a resistive load, for example, the inductive load can be a coil, and the resistive load can be a heater. It should be noted that the dummy load can be set at the same capacity as the cooling machine. For example, when the power of the cooling machine is 1200W, if an inductive load is selected, the capacity of the inductive load is 1200VA, and if a resistive load is selected, the thermal power of the resistance is 1200W.
如图1所示，高速伪负载接触器与低速伪负载接触器分别连接对应的高速伪负载与低速伪负载，蒸发器风扇连接至变频器的电压输出端，变频器的电压输入端接冷机的电源。通信线采用双绞线RS485总线形式进行连接。As shown in Figure 1, the high-speed pseudo-load contactor and low-speed pseudo-load contactor are connected to the corresponding high-speed pseudo-load and low-speed pseudo-load respectively, the evaporator fan is connected to the voltage output terminal of the inverter, and the voltage input terminal of the inverter is connected to the refrigerator power supply. The communication line is connected in the form of twisted pair RS485 bus.
当冷机启动，主控制单元经由高低档信号采集开关采集高速伪负载接触器和低速伪负载接触器的信号，由接触器导通伪负载，以保证冷机正常工作，同时主控制单元启动蒸发器风扇，并调节风扇的转速，由于使用变频器调节蒸发器风扇，蒸发器风扇的转速可以为无级调速或调节。When the cold machine starts, the main control unit collects the signals of the high-speed pseudo-load contactor and the low-speed pseudo-load contactor through the high-low signal acquisition switch, and the contactor conducts the pseudo-load to ensure the normal operation of the cold machine. At the same time, the main control unit starts the evaporation The evaporator fan, and adjust the speed of the fan, because the frequency converter is used to adjust the evaporator fan, the speed of the evaporator fan can be steplessly adjusted or adjusted.
参考图2，当主控制单元接到调速命令时，发送调速命令给变频器。需要说明的时，调速命令可能是来自人工的命令，也可以为主控制单元根据设置在冷藏集装箱内部的传感器感测到的信号(例如温度、湿度或者风量)而产生的调速命令。此时，主控制单元采集变频器的控制值(例如，可以采集变频器输出端的输出电压，或者采集变频器的反馈信号)，若变频器的输出未符合要求，则变频器继续调整。若变频器的输出符合要求，则判断蒸发器的工作转速。若调速后的蒸发器转速符合调速命令的设定值，则结束调速，若不符合，则继续调速直至符合设定值。Referring to Fig. 2, when the main control unit receives the speed regulation command, it sends the speed regulation command to the frequency converter. When it needs to be explained, the speed regulation command may be a manual command, or it may be a speed regulation command generated by the main control unit according to a signal (such as temperature, humidity or air volume) sensed by a sensor installed inside the refrigerated container. At this time, the main control unit collects the control value of the frequency converter (for example, it can collect the output voltage of the output terminal of the frequency converter, or collect the feedback signal of the frequency converter), and if the output of the frequency converter does not meet the requirements, the frequency converter continues to adjust. If the output of the frequency converter meets the requirements, then judge the working speed of the evaporator. If the evaporator speed after speed regulation meets the set value of the speed regulation command, the speed regulation will end, if not, continue the speed regulation until it meets the set value.
此外，本发明还公开了一种冷藏集装箱，其包括上述的调速系统。In addition, the present invention also discloses a refrigerated container, which includes the above-mentioned speed regulating system.
本发明已经通过上述实施方式进行了说明，但应当理解的是，上述实施方式只是用于举例和说明的目的，而非意在将本发明限制于所描述的实施方式范围内。此外本领域技术人员可以理解的是，本发明并不局限于上述实施方式，根据本发明的教导还可以做出更多种的变型和修改，这些变型和修改均落在本发明所要求保护的范围以内。The present invention has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of illustration and description, and are not intended to limit the present invention within the scope of the described embodiments. In addition, those skilled in the art can understand that the present invention is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the claimed scope of the present invention. within the range.
Claims (6)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510405717.9A CN106337826B (en) | 2015-07-10 | 2015-07-10 | Speed-regulating system and frozen products insulated container with it |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338124A (en) * | 2015-07-10 | 2017-01-18 | 青岛中集特种冷藏设备有限公司 | Regulation control system for micro-environment in refrigerating container and refrigerating container |
| WO2024132061A1 (en) * | 2022-12-20 | 2024-06-27 | Maersk Container Industry A/S | Method for controlling ventilation flow rate in a container and a container being controlable by the method |
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| CN102464166A (en) * | 2010-11-03 | 2012-05-23 | 中国国际海运集装箱(集团)股份有限公司 | Refrigerated container cooler, refrigerated container and control method for refrigerated container cooler |
| US20130340457A1 (en) * | 2012-06-25 | 2013-12-26 | Whirlpool Corporation | Fault detection and diagnosis for refrigerator from compressor sensor |
| CN103964088A (en) * | 2013-01-28 | 2014-08-06 | 中国国际海运集装箱(集团)股份有限公司 | Ventilation device and refrigerated container with same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0650648A (en) * | 1992-07-31 | 1994-02-25 | Mitsubishi Heavy Ind Ltd | Refrigerator for container |
| CN102464166A (en) * | 2010-11-03 | 2012-05-23 | 中国国际海运集装箱(集团)股份有限公司 | Refrigerated container cooler, refrigerated container and control method for refrigerated container cooler |
| US20130340457A1 (en) * | 2012-06-25 | 2013-12-26 | Whirlpool Corporation | Fault detection and diagnosis for refrigerator from compressor sensor |
| CN103964088A (en) * | 2013-01-28 | 2014-08-06 | 中国国际海运集装箱(集团)股份有限公司 | Ventilation device and refrigerated container with same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338124A (en) * | 2015-07-10 | 2017-01-18 | 青岛中集特种冷藏设备有限公司 | Regulation control system for micro-environment in refrigerating container and refrigerating container |
| WO2024132061A1 (en) * | 2022-12-20 | 2024-06-27 | Maersk Container Industry A/S | Method for controlling ventilation flow rate in a container and a container being controlable by the method |
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| CN106337826B (en) | 2019-04-12 |
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