System for controlling low temperature injury of cold-sensitive fruit vegetables by combining intelligent pre-cooling and segmented controlled atmosphere storage

Abstract

A system for controlling low temperature injury of cold-sensitive fruit vegetables by combining intelligent pre-cooling and segmented controlled atmosphere storage includes a sensor detection module, a data collection module, a wireless communications module, a terminal, and a control system, where the sensor detection module detects carbon dioxide, ethylene, and the temperature and the humidity within a fresh keeping chamber, then data is collected by using the data collection module connected to the sensor detection module, and then varying data is transmitted to the terminal by using the wireless communications module connected to the data collection module; the sensor detection module is connected to the control system; and after the terminal reads data detected by a sensor, an environment parameter is controlled by using the control system.

Claims

1. A system for controlling low temperature injury of cold-sensitive fruits and vegetables by combining a pre-cooling and a segmented controlled atmosphere storage, the system comprising: a sensor detection module, a data collection module, a wireless communications module, a terminal, and a control system, wherein the sensor detection module is capable of detecting carbon dioxide, ethylene, and a temperature and a humidity within a fresh keeping chamber, then data is configured to be collected by the data collection module connected to the sensor detection module, and then the data is configured to be transmitted to the terminal by the wireless communications module connected to the data collection module; the sensor detection module is connected to the control system; and after the terminal is configured to read the data, wherein the data is configured to be detected by a sensor, an environment parameter is configured to be controlled by the control system, and the sensor detection module comprises a carbon dioxide detection module, an ethylene detection module, and a temperature and humidity detection module, wherein the carbon dioxide detection module is configured to detect the concentration of carbon dioxide within the fresh keeping chamber, the ethylene detection module is configured to detect the concentration of ethylene within the fresh keeping chamber, and the temperature and humidity detection module is configured to detect the temperature and the humidity within the fresh keeping chamber; the control system comprises a controlled atmosphere control system and a temperature and humidity control system, wherein the controlled atmosphere control system is configured to control release of inert gas within the fresh keeping chamber, and the temperature and humidity control system is configured to control the temperature and the humidity within the fresh keeping chamber; and the temperature and humidity detection module is connected to the temperature and humidity control system, and both the carbon dioxide detection module and the ethylene detection module are connected to the controlled atmosphere control system; and wherein the carbon dioxide detection module, ethylene detection module and temperature and humidity detection module are inside of the fresh keeping chamber, and the controlled atmosphere control system and the temperature and humidity control system are outside of the fresh keeping chamber.

2. The system for controlling low temperature injury of cold-sensitive fruit vegetables by combining the pre-cooling and the segmented controlled atmosphere storage according to claim 1, wherein the terminal comprises a monitor and a smartphone, wherein the monitor is configured to record the data transmitted from the wireless communications module, and the smartphone is configured to record the data and give an alarm about a preset value.

3. The system for controlling low temperature injury of cold-sensitive fruit vegetables by combining the pre-cooling and the segmented controlled atmosphere storage according to claim 1, wherein an air pre-cooling with a temperature of 0 to 4° C. for a duration of 0.5 to 2 h is configured to be performed on a material within the fresh keeping chamber by the temperature and humidity control system; in a pre-cooling process, the concentration of carbon dioxide within the fresh keeping chamber is configured to be measured in real time by using the carbon dioxide detection module; the pre-cooling is capable of ending when the volumetric concentration of carbon dioxide is configured to reach 2% to 3%; and a high-carbon dioxide and low-oxygen storage of a first phase is configured to be performed on the material within the fresh keeping chamber by means of a modified atmosphere, and capable of being controlled by the temperature and humidity control system, a storage temperature is 6 to 8° C., and a relative humidity is 85% to 95%; the concentration of ethylene within the fresh keeping chamber is configured to be detected by the ethylene detection module; when the concentration of ethylene is configured to reach 7 to 9 ppm, metabolism of ethylene is capable of increasing; inert gas storage of a second phase is configured to be performed; an inert gas controlled atmosphere storage is configured to be adjusted within the fresh keeping chamber by using the controlled atmosphere control system, thereby being capable of inhibiting a respiratory and physiological metabolism and being capable of lowering an occurrence rate of cold injury.

4. The system for controlling low temperature injury of cold-sensitive fruit vegetables by combining the pre-cooling and the segmented controlled atmosphere storage according to claim 3, wherein when the carbon dioxide detection module is capable of performing data collection, data collection is configured to be performed once every 1 min on the volume of carbon dioxide whose volumetric concentration is 0% to 25% within the fresh keeping chamber; each data collection uses a multi-point measurement manner and uses an average value as a detection signal to remotely transmit the data in a wireless manner.

5. The system for controlling low temperature injury of cold-sensitive fruit vegetables by combining the pre-cooling and the segmented controlled atmosphere storage according to claim 3, wherein the ethylene detection module is capable of performing real-time data collection once every 1 min on the concentration of ethylene whose concentration is 0 to 200 ppm within the controlled atmosphere storage system, and each data collection uses a multi-point measurement manner and uses an average value as a detection signal.

6. The system for controlling low temperature injury of cold-sensitive fruit vegetables by combining the pre-cooling and the segmented controlled atmosphere storage according to claim 3, wherein during controlled atmosphere control of a first phase, the modified atmosphere is configured to be performed by using a high-density polyethylene (HDPE) bag, configured to form the high-carbon dioxide and low-oxygen storage environment.

7. The system for controlling low temperature injury of cold-sensitive fruit vegetables by combining the pre-cooling and the segmented controlled atmosphere storage according to claim 3, wherein the segmented controlled atmosphere storage is configured to be performed by using argon at a late period of storage of the second phase, thereby being capable of reducing membrane permeability, being capable of inhibiting respiratory and physiological metabolism, and being capable of lowering an occurrence rate of cold injury.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a block diagram of a control system according to the present invention.

DETAILED DESCRIPTION

Embodiment 1: A System for Controlling Low Temperature Injury of Tomatoes by Combining Intelligent Pre-Cooling and Segmented Controlled Atmosphere Storage

(2) A system for controlling low temperature injury of cold-sensitive fruit vegetables by combining intelligent pre-cooling and segmented controlled atmosphere storage, comprising: a sensor detection module, a data collection module, a wireless communications module, a terminal, and a control system, wherein the sensor detection module detects carbon dioxide, ethylene, and the temperature and the humidity within a fresh keeping chamber, then data is collected by using the data collection module connected to the sensor detection module, and then varying data is transmitted to the terminal by using the wireless communications module connected to the data collection module; the sensor detection module is connected to the control system; and after the terminal reads data detected by a sensor, an environment parameter is controlled by using the control system.

(3) The sensor detection module specifically comprises a carbon dioxide detection module, an ethylene detection module, and a temperature and humidity detection module, wherein the carbon dioxide detection module is configured to detect the concentration of carbon dioxide within the fresh keeping chamber, the ethylene detection module is configured to detect the concentration of ethylene within the fresh keeping chamber, and the temperature and humidity detection module is configured to detect the temperature and the humidity within the fresh keeping chamber;

(4) the control system comprises a controlled atmosphere control system and a temperature and humidity control system, wherein the controlled atmosphere control system is configured to control release of inert gas within the fresh keeping chamber, and the temperature and humidity control system is configured to control the temperature and the humidity within the fresh keeping chamber;

(5) the temperature and humidity detection module is connected to the temperature and humidity control system, and both the carbon dioxide detection module and the ethylene detection module are connected to the controlled atmosphere control system.

(6) The terminal comprises a monitor and a smartphone, wherein the monitor is configured to record data transmitted from the wireless communications module, and the smartphone is configured to record data and give an alarm about a preset value.

(7) Fresh, unrotten, uniform, and green-mature tomatoes 1000 g are selected and are subject to pre-cooling under 2° C. (an environment temperature is the room temperature 25° C.). The concentration of carbon dioxide in a pre-cooling process is collected in real time. When a preprocessing time is 50 min, the volume of carbon dioxide reaches 2%. In this case, respiratory intensity is lowered, and pre-cooling ends. Low-temperature storage is performed at 7° C.; segmented controlled atmosphere fresh-keeping is performed according to respiratory and metabolism characteristics. At an initial period (0.sup.th to 10.sup.th d) of storage, a high-density polyethylene (HDPE) bag performs modified atmosphere. At an 11.sup.th d of low-temperature storage, the concentration of ethylene reaches 8 ppm. In this case, a release speed of ethylene prominently increases, and controlled atmosphere storage of a late period (12.sup.th to 25.sup.th d) of inert gas, that is, argon, is performed. Cold injury postpones occurring at the 16.sup.th to 18.sup.th d, and a cold injury rate is less than 10%.

Embodiment 2: A System for Controlling Low Temperature Injury of Broccoli by Combining Intelligent Pre-Cooling and Segmented Controlled Atmosphere Storage

(8) The configuration of the system structure is the same as that of embodiment 1.

(9) Fresh, unrotten, and uniform broccoli 1000 g are selected and are subject to pre-cooling under 4° C. (an environment temperature is the room temperature 25° C.). The concentration of carbon dioxide in a pre-cooling process is collected in real time. When a preprocessing time is 65 min, the volume of carbon dioxide reaches 2%. In this case, respiratory intensity is lowered, and pre-cooling ends.

(10) Low-temperature storage is performed at 7° C.; segmented controlled atmosphere fresh-keeping is performed according to respiratory and metabolism characteristics. At an initial period (0.sup.th to 12.sup.th d) of storage, a high-density polyethylene (HDPE) bag performs modified atmosphere. At an 13.sup.th d of low-temperature storage, the concentration of ethylene reaches 7 ppm. In this case, a release speed of ethylene prominently increases, and controlled atmosphere storage of a late period (13.sup.th to 25.sup.th d) of inert gas, that is, argon, is performed. Cold injury postpones occurring at the 15.sup.th to 17.sup.th d, and a cold injury rate is less than 10%.