阅读说明：本技术 一种保护环境试验设备的控制方法及其系统 (Control method and system for environmental protection test equipment ) 是由 周栋 张洪阳 熊卫忠 方忠诚 晏刚 鱼剑琳 于 2020-12-28 设计创作，主要内容包括：本发明实施例提供一种保护环境试验设备的控制方法及其系统,控制方法包括：获取当前间室的电磁阀状态；若当前间室的电磁阀为打开状态,获取当前间室的门状态；若当前间室的门状态为打开状态,获取当前间室的蒸发压力；比较当前间室的蒸发压力与第一设定值的大小；若当前间室的蒸发压力小于第一设定值,比较当前间室的门打开时间与第二设定值的大小,第二设定值大于零；若当前间室的门打开时间大于第二设定值,控制环境试验设备停机或控制当前间室的电子膨胀阀的开度逐渐减小到最小开度后控制当前间室的电磁阀关闭。本发明实施例提供的保护环境试验设备的控制方法及其系统,在间室的门打开时间过长时,保护环境试验设备不受损坏。(The embodiment of the invention provides a control method and a system for environmental protection test equipment, wherein the control method comprises the following steps: acquiring the state of an electromagnetic valve of a current chamber; if the electromagnetic valve of the current compartment is in an open state, acquiring the door state of the current compartment; if the door state of the current compartment is an open state, acquiring the evaporation pressure of the current compartment; comparing the evaporating pressure of the current chamber with a first set value; if the evaporation pressure of the current chamber is smaller than a first set value, comparing the opening time of the door of the current chamber with a second set value, wherein the second set value is larger than zero; and if the opening time of the door of the current compartment is greater than a second set value, controlling the environmental test equipment to stop or controlling the opening degree of the electronic expansion valve of the current compartment to gradually decrease to the minimum opening degree, and then controlling the electromagnetic valve of the current compartment to close. According to the control method and the control system for protecting the environmental test equipment, provided by the embodiment of the invention, the environmental test equipment is protected from being damaged when the door of the compartment is opened for too long time.)

1. A control method for a protected environment test apparatus, comprising:

acquiring the state of an electromagnetic valve of a current chamber;

if the electromagnetic valve of the current compartment is in an open state, acquiring the door state of the current compartment;

if the door state of the current compartment is an open state, acquiring the evaporation pressure of the current compartment;

comparing the evaporation pressure of the current chamber with a first set value, wherein the first set value is larger than zero;

if the evaporation pressure of the current chamber is smaller than a first set value, comparing the door opening time of the current chamber with a second set value, wherein the second set value is larger than zero;

and if the opening time of the door of the current compartment is greater than a second set value, controlling the environmental test equipment to stop or controlling the opening degree of the electronic expansion valve of the current compartment to gradually decrease to the minimum opening degree, and then controlling the electromagnetic valve of the current compartment to close.

2. The control method according to claim 1, wherein controlling the environmental test equipment to stop or controlling the solenoid valve of the current compartment to close after the opening degree of the electronic expansion valve of the current compartment is gradually decreased to the minimum opening degree, if the door opening time of the current compartment is greater than the second set value, comprises:

and if the electromagnetic valves of other chambers of the environment test equipment are in a closed state, controlling the environment test equipment to stop.

3. The control method of claim 1, wherein controlling the environmental test equipment to be stopped or controlling the solenoid valve of the current compartment to be closed after the opening degree of the electronic expansion valve of the current compartment is gradually decreased to the minimum opening degree, if the door opening time of the current compartment is greater than the second set value, comprises:

and if the electromagnetic valves of other chambers of the environment test equipment are in an open state and the door states of other chambers are in a closed state, controlling the opening degree of the electronic expansion valve of the current chamber to gradually decrease to the minimum opening degree and then controlling the electromagnetic valve of the current chamber to close.

4. The control method of claim 1, wherein controlling the environmental test equipment to be stopped or controlling the solenoid valve of the current compartment to be closed after the opening degree of the electronic expansion valve of the current compartment is gradually decreased to the minimum opening degree, if the door opening time of the current compartment is greater than the second set value, comprises:

and if the electromagnetic valves of other chambers of the environment test equipment are in an open state, the doors of other chambers are in an open state, and the evaporation pressures of other chambers are all smaller than a first set value, controlling the environment test equipment to stop.

5. The control method of claim 1, wherein controlling the environmental test equipment to be stopped or controlling the solenoid valve of the current compartment to be closed after the opening degree of the electronic expansion valve of the current compartment is gradually decreased to the minimum opening degree, if the door opening time of the current compartment is greater than the second set value, comprises:

and if the electromagnetic valves of other chambers of the environment test equipment are all in an open state, the door states of other chambers are all in an open state, and the evaporation pressures of other chambers are all larger than a first set value, controlling the opening degree of the electronic expansion valve of the current chamber to be gradually reduced to the minimum opening degree and then controlling the electromagnetic valve of the current chamber to be closed.

6. The control method according to claim 1, characterized by further comprising:

if the door opening time of the current compartment is smaller than a second set value, the electromagnetic valves of other compartments of the environment test equipment are all in an open state, the door states of other compartments are all in an open state, the evaporation pressures of other compartments are all smaller than the first set value, and the door opening times of other compartments are all smaller than the second set value;

or if the door opening time of the current chamber is less than a second set value, the electromagnetic valves of other chambers of the environment test equipment are all in an open state, the door states of other chambers are all in an open state, and the evaporation pressures of other chambers are all greater than the first set value;

or if the evaporation pressure of the current chamber is greater than the first set value, the electromagnetic valves and the door states of other chambers of the environment test equipment are both in an open state, and the evaporation pressures of other chambers are both greater than the first set value;

or if the evaporation pressure of the current chamber is greater than the first set value, the electromagnetic valves and the door states of other chambers of the environment test equipment are both in an open state, the evaporation pressures of other chambers are both less than the first set value, and the door opening times of other chambers are both less than the second set value;

and controlling the environmental test equipment to normally operate.

7. The control method according to claim 1, characterized by further comprising:

the evaporation pressure of the current chamber is larger than a first set value or the opening time of the door of the current chamber is smaller than a second set value, electromagnetic valves of other chambers of the environment test equipment are all in a closed state, and the environment test equipment is controlled to normally operate.

8. The control method according to claim 1, characterized by further comprising:

the evaporation pressure of the current chamber is larger than a first set value or the door opening time of the current chamber is smaller than a second set value, the electromagnetic valves of other chambers of the environment test equipment are all in an open state, the door states of the other chambers are all in a closed state, and the environment test equipment is controlled to normally operate.

9. The control method according to claim 1, wherein controlling the post-control solenoid valve, which gradually decreases the opening degree of the electronic expansion valve to a minimum opening, to be closed comprises:

controlling the opening degree of the electronic expansion valve of the current chamber to decrease a third set value every period until the opening degree of the electronic expansion valve is decreased to the minimum opening degree of the electronic expansion valve, and controlling the electromagnetic valve of the current chamber to be closed;

wherein the third set value is greater than zero.

10. A control system for a protected environment testing apparatus, comprising: the system comprises a control module, an electronic expansion valve, an electromagnetic valve and an evaporation pressure sensor;

the control module is respectively connected with the electronic expansion valve, the electromagnetic valve and the evaporation pressure sensor;

the evaporation pressure sensor is used for detecting the evaporation pressure of the current chamber and sending the detected evaporation pressure of the current chamber to the control module;

the control module is used for acquiring the state of the electromagnetic valve of the current chamber;

the control module is used for acquiring the door state of the current chamber if the electromagnetic valve of the current chamber is in an open state;

the control module is used for acquiring the evaporation pressure of the current chamber if the door state of the current chamber is an open state;

the control module is used for comparing the evaporation pressure of the current chamber with a first set value, and the first set value is larger than zero;

the control module is used for comparing the door opening time of the current chamber with a second set value if the evaporation pressure of the current chamber is smaller than a first set value, wherein the second set value is larger than zero;

and the control module is used for controlling the environmental test equipment to stop or controlling the opening degree of the electronic expansion valve of the current compartment to be gradually reduced to the minimum opening degree and then controlling the electromagnetic valve of the current compartment to be closed if the door opening time of the current compartment is greater than a second set value.

Technical Field

The invention relates to a refrigeration control technology of environmental test equipment, in particular to a control method and a control system for protecting the environmental test equipment.

Background

An environmental test apparatus typically includes a plurality of compartments, and when the environmental test apparatus is used for battery testing, it is typically required that the temperature of each compartment be kept constant for a long period of time.

The user can open the door of the middle room of the environmental test equipment in the process of using the environmental test equipment, and if the door of the middle room is opened for a long time, the environmental test equipment can be damaged.

When the environmental test equipment in the prior art detects that the door of the compartment is opened for a long time, an alarm prompt is sent out, and the problem that the environmental test equipment is damaged due to the fact that the door of the compartment is opened for a long time cannot be fundamentally solved.

Disclosure of Invention

According to the control method and the control system for protecting the environmental test equipment, provided by the embodiment of the invention, the environmental test equipment is protected from being damaged when the door of the compartment is opened for too long time.

In a first aspect, an embodiment of the present invention provides a control method for a test device for protecting an environment, including:

acquiring the state of an electromagnetic valve of a current chamber;

if the electromagnetic valve of the current compartment is in an open state, acquiring the door state of the current compartment;

if the door state of the current compartment is an open state, acquiring the evaporation pressure of the current compartment;

comparing the evaporation pressure of the current chamber with a first set value, wherein the first set value is larger than zero;

if the evaporation pressure of the current chamber is smaller than a first set value, comparing the door opening time of the current chamber with a second set value, wherein the second set value is larger than zero;

and if the opening time of the door of the current compartment is greater than a second set value, controlling the environmental test equipment to stop or controlling the opening degree of the electronic expansion valve of the current compartment to gradually decrease to the minimum opening degree, and then controlling the electromagnetic valve of the current compartment to close.

Optionally, if the door opening time of the current compartment is greater than the second set value, controlling the environmental test equipment to stop or controlling the opening degree of the electronic expansion valve of the current compartment to gradually decrease to the minimum opening degree, and then controlling the electromagnetic valve of the current compartment to close, includes:

and if the electromagnetic valves of other chambers of the environment test equipment are in a closed state, controlling the environment test equipment to stop.

Optionally, if the door opening time of the current compartment is greater than the second set value, controlling the environmental test equipment to stop or controlling the opening degree of the electronic expansion valve of the current compartment to gradually decrease to the minimum opening degree, and then controlling the electromagnetic valve of the current compartment to close includes:

and if the electromagnetic valves of other chambers of the environment test equipment are in an open state and the door states of other chambers are in a closed state, controlling the opening degree of the electronic expansion valve of the current chamber to gradually decrease to the minimum opening degree and then controlling the electromagnetic valve of the current chamber to close.

Optionally, if the door opening time of the current compartment is greater than the second set value, controlling the environmental test equipment to stop or controlling the opening degree of the electronic expansion valve of the current compartment to gradually decrease to the minimum opening degree, and then controlling the electromagnetic valve of the current compartment to close includes:

and if the electromagnetic valves of other chambers of the environment test equipment are in an open state, the doors of other chambers are in an open state, and the evaporation pressures of other chambers are all smaller than a first set value, controlling the environment test equipment to stop.

Optionally, if the door opening time of the current compartment is greater than the second set value, controlling the environmental test equipment to stop or controlling the opening degree of the electronic expansion valve of the current compartment to gradually decrease to the minimum opening degree, and then controlling the electromagnetic valve of the current compartment to close includes:

and if the electromagnetic valves of other chambers of the environment test equipment are all in an open state, the door states of other chambers are all in an open state, and the evaporation pressures of other chambers are all larger than a first set value, controlling the opening degree of the electronic expansion valve of the current chamber to be gradually reduced to the minimum opening degree and then controlling the electromagnetic valve of the current chamber to be closed.

Optionally, the control method further includes: if the door opening time of the current compartment is smaller than a second set value, the electromagnetic valves of other compartments of the environment test equipment are all in an open state, the door states of other compartments are all in an open state, the evaporation pressures of other compartments are all smaller than the first set value, and the door opening times of other compartments are all smaller than the second set value;

or if the door opening time of the current chamber is less than a second set value, the electromagnetic valves of other chambers of the environment test equipment are all in an open state, the door states of other chambers are all in an open state, and the evaporation pressures of other chambers are all greater than the first set value;

or if the evaporation pressure of the current chamber is greater than the first set value, the electromagnetic valves and the door states of other chambers of the environment test equipment are both in an open state, and the evaporation pressures of other chambers are both greater than the first set value;

or if the evaporation pressure of the current chamber is greater than the first set value, the electromagnetic valves and the door states of other chambers of the environment test equipment are both in an open state, the evaporation pressures of other chambers are both less than the first set value, and the door opening times of other chambers are both less than the second set value;

and controlling the environmental test equipment to normally operate.

Optionally, the control method further includes: the evaporation pressure of the current chamber is larger than a first set value or the opening time of the door of the current chamber is smaller than a second set value, electromagnetic valves of other chambers of the environment test equipment are all in a closed state, and the environment test equipment is controlled to normally operate.

Optionally, the control method further includes: the evaporation pressure of the current chamber is larger than a first set value or the door opening time of the current chamber is smaller than a second set value, the electromagnetic valves of other chambers of the environment test equipment are all in an open state, the door states of the other chambers are all in a closed state, and the environment test equipment is controlled to normally operate.

Optionally, the controlling the closing of the solenoid valve after the opening degree of the electronic expansion valve is gradually decreased to the minimum opening degree includes:

controlling the opening degree of the electronic expansion valve of the current chamber to decrease a third set value every period until the opening degree of the electronic expansion valve is decreased to the minimum opening degree of the electronic expansion valve, and controlling the electromagnetic valve of the current chamber to be closed; wherein the third set value is greater than zero.

In a second aspect, an embodiment of the present invention further provides a control system for environmental protection test equipment, including: the system comprises a control module, an electronic expansion valve, an electromagnetic valve and an evaporation pressure sensor;

the control module is respectively connected with the electronic expansion valve, the electromagnetic valve and the evaporation pressure sensor;

the evaporation pressure sensor is used for detecting the evaporation pressure of the current chamber and sending the detected evaporation pressure of the current chamber to the control module;

the control module is used for acquiring the state of the electromagnetic valve of the current chamber;

the control module is used for acquiring the door state of the current chamber if the electromagnetic valve of the current chamber is in an open state;

the control module is used for acquiring the evaporation pressure of the current chamber if the door state of the current chamber is an open state;

the control module is used for comparing the evaporation pressure of the current chamber with a first set value, and the first set value is larger than zero;

the control module is used for comparing the door opening time of the current chamber with a second set value if the evaporation pressure of the current chamber is smaller than a first set value, wherein the second set value is larger than zero;

and the control module is used for controlling the environmental test equipment to stop or controlling the opening degree of the electronic expansion valve of the current compartment to be gradually reduced to the minimum opening degree and then controlling the electromagnetic valve of the current compartment to be closed if the door opening time of the current compartment is greater than a second set value.

According to the control method for protecting the environmental test equipment, provided by the embodiment of the invention, after a door of a chamber in the environmental test equipment is opened, the size of the evaporation pressure of the current chamber and a first set value is detected, when the evaporation pressure of the current chamber is smaller than the first set value, the door opening time of the current chamber is continuously compared, and when the door opening time of the current chamber is larger than a second set value, the environmental test equipment is controlled to stop or the opening degree of an electronic expansion valve of the current chamber is controlled to be gradually reduced to the minimum value, and then the electromagnetic valve of the current chamber is closed, so that the environmental test equipment is protected. According to the control method for protecting the environmental test equipment, provided by the embodiment of the invention, the environmental test equipment is protected from being damaged when the door of the compartment is opened for too long time.

Drawings

FIG. 1 is a schematic flow chart of a control method for environmental protection test equipment according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a control system of a device for environmental protection testing according to an embodiment of the present invention.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad invention. It should be further noted that, for convenience of description, only some structures, not all structures, relating to the embodiments of the present invention are shown in the drawings.

Fig. 1 is a schematic flow chart of a method for controlling environmental protection testing equipment according to an embodiment of the present invention, and referring to fig. 1, the method for controlling environmental protection testing equipment according to the embodiment of the present invention includes:

110. acquiring the state of an electromagnetic valve of a current chamber;

120. if the electromagnetic valve of the current compartment is in an open state, acquiring the door state of the current compartment;

130. if the door state of the current compartment is an open state, acquiring the evaporation pressure of the current compartment;

140. comparing the evaporation pressure of the current chamber with a first set value, wherein the first set value is larger than zero;

150. if the evaporation pressure of the current chamber is smaller than a first set value, comparing the opening time of the door of the current chamber with a second set value, wherein the second set value is larger than zero;

160. and if the opening time of the door of the current compartment is greater than a second set value, controlling the environmental test equipment to stop or controlling the opening degree of the electronic expansion valve of the current compartment to gradually decrease to the minimum opening degree, and then controlling the electromagnetic valve of the current compartment to close.

Specifically, the first set value is an evaporation pressure protection judgment value of all compartments in the environment test equipment in a door opening state, when the evaporation pressure of the current compartment is greater than the first set value, it is indicated that the environment test equipment cannot be damaged when the door of the current compartment is opened, and when the actual evaporation pressure of the current compartment is less than the first set value, it is indicated that the environment test equipment may be damaged when the door of the current compartment is opened, and the door opening time of the current compartment needs to be analyzed again under specific conditions. The second set value is the longest time that the door of the current compartment can be opened, and when the door opening time of the current compartment is longer than the second set time, the environmental test equipment can operate in an unstable environment for a long time, and if protective measures are not taken, the environmental test equipment can be damaged. It should be noted that after the door of the front compartment is opened, when the door opening time of the front compartment is within the second set value range, it is detected that the door state of the front compartment is changed from the open state to the closed state, and the environmental test equipment is controlled to continue to work normally.

According to the control method for protecting the environmental test equipment, provided by the embodiment of the invention, after a door of a chamber in the environmental test equipment is opened, the size of the evaporation pressure of the current chamber and a first set value is detected, when the evaporation pressure of the current chamber is smaller than the first set value, the door opening time of the current chamber is continuously compared, and when the door opening time of the current chamber is larger than a second set value, the environmental test equipment is controlled to stop or the opening degree of an electronic expansion valve of the current chamber is controlled to be gradually reduced to the minimum value, and then the electromagnetic valve of the current chamber is closed, so that the environmental test equipment is protected. According to the control method for protecting the environmental test equipment, provided by the embodiment of the invention, the environmental test equipment is protected from being damaged when the door of the compartment is opened for too long time.

Optionally, if the door opening time of the current compartment is greater than the second set value, controlling the environmental test equipment to stop or controlling the opening degree of the electronic expansion valve of the current compartment to gradually decrease to the minimum opening degree, and then controlling the electromagnetic valve of the current compartment to close, includes:

and if the electromagnetic valves of other chambers of the environment test equipment are in a closed state, controlling the environment test equipment to stop.

Specifically, the electromagnetic valves of other chambers are all in a closed state, which indicates that the other chambers are not refrigerated, and the opening time of the door of the current chamber is greater than a second set value, so that the environmental test equipment can be directly controlled to stop in order to protect the environmental test equipment from being damaged.

Optionally, if the door opening time of the current compartment is greater than the second set value, controlling the environmental test equipment to stop or controlling the opening degree of the electronic expansion valve of the current compartment to gradually decrease to the minimum opening degree, and then controlling the electromagnetic valve of the current compartment to close includes:

and if the electromagnetic valves of other chambers of the environment test equipment are all in an open state and the door states of other chambers are all in a closed state, controlling the opening degree of the electronic expansion valve of the current chamber to gradually decrease to the minimum opening degree and then controlling the electromagnetic valve of the current chamber to close.

Specifically, the electromagnetic valves of the other compartments are all in an open state, which indicates that the other compartments are refrigerating, and the refrigerating system in the environment test equipment is required to provide refrigerating capacity for the current compartment and the other compartments. When the door opening time of the current compartment is longer than the second set time, in order to not affect the refrigeration requirements of other compartments, the electronic expansion valve of the current compartment needs to be controlled to gradually reduce to the minimum opening degree, and then the electromagnetic valve of the current compartment is controlled to close. It should be noted that, in the process of gradually decreasing the electronic expansion valve, if it is detected that the door state of the current compartment is changed from the open state to the closed state, the environmental test equipment is controlled to resume the normal operating mode.

Optionally, if the door opening time of the current compartment is greater than the second set value, controlling the environmental test equipment to stop or controlling the opening degree of the electronic expansion valve of the current compartment to gradually decrease to the minimum opening degree, and then controlling the electromagnetic valve of the current compartment to close includes:

and if the electromagnetic valves of other chambers of the environment test equipment are in an open state, the doors of other chambers are in an open state, and the evaporation pressures of other chambers are smaller than a first set value, controlling the environment test equipment to stop.

Specifically, it should be noted that when the electromagnetic valves and the gates of all the chambers in the environmental test equipment are in the open state, and the evaporation pressures of all the chambers are less than the first set value, the gate open time of at least one chamber in all the chambers is greater than the second set time, and the environmental test equipment is controlled to stop.

Optionally, if the door opening time of the current compartment is greater than the second set value, controlling the environmental test equipment to stop or controlling the opening degree of the electronic expansion valve of the current compartment to gradually decrease to the minimum opening degree, and then controlling the electromagnetic valve of the current compartment to close includes:

and if the electromagnetic valves of other chambers of the environment test equipment are all in an open state, the door states of other chambers are all in an open state, and the evaporation pressures of other chambers are all larger than a first set value, controlling the opening degree of the electronic expansion valve of the current chamber to gradually decrease to the minimum opening degree and then controlling the electromagnetic valve of the current chamber to close.

Specifically, the evaporation pressures of the other chambers are all greater than the first set value, which indicates that the doors of the other chambers do not damage the environment testing equipment in the open state, and therefore, in order to enable the refrigeration system in the environment testing equipment to continue to provide the refrigeration capacity for the other chambers, the opening degree of the electronic expansion valve of the current chamber needs to be controlled to be gradually reduced to the minimum opening degree, and then the electromagnetic valve of the current chamber is controlled to be closed, so that the refrigeration system does not provide refrigeration for the current chamber any more.

Optionally, the control method for the environmental protection test device provided in the embodiment of the present invention further includes: if the door opening time of the current compartment is smaller than a second set value, the electromagnetic valves of other compartments of the environment test equipment are all in an open state, the door states of other compartments are all in an open state, the evaporation pressures of other compartments are all smaller than the first set value, and the door opening times of other compartments are all smaller than the second set value;

or if the door opening time of the current chamber is less than a second set value, the electromagnetic valves of other chambers of the environment test equipment are all in an open state, the door states of other chambers are all in an open state, and the evaporation pressures of other chambers are all greater than the first set value;

or if the evaporation pressure of the current chamber is greater than the first set value, the electromagnetic valves and the door states of other chambers of the environment test equipment are both in an open state, and the evaporation pressures of other chambers are both greater than the first set value;

or if the evaporation pressure of the current chamber is greater than the first set value, the electromagnetic valves and the door states of other chambers of the environment test equipment are both in an open state, the evaporation pressures of other chambers are both less than the first set value, and the door opening times of other chambers are both less than the second set value;

and controlling the environmental test equipment to normally operate.

Specifically, when the electromagnetic valves and the doors of all the chambers in the environmental test equipment are in the open state, the evaporation pressures of all the chambers are smaller than a first set value, and the door opening times of all the chambers are smaller than a second set value, it is described that the door opening times of all the chambers are within the longest time range in which the doors can be opened, and the door opening times of all the chambers do not damage the environmental test equipment, so that the environmental test equipment is controlled to normally operate. When the states of the electromagnetic valves and the doors of all the compartments in the environment test equipment are in an opening state, the evaporation pressure of the current compartment is smaller than a first set value, the evaporation pressure of other compartments is larger than the first set value, the situation that the environment test equipment is not damaged when the doors of other compartments are opened is shown, the situation that the environment test equipment is not damaged when the door of the current compartment is opened is shown when the door of the current compartment is opened is smaller than a second set value, and therefore the environment test equipment is controlled to normally operate. When the electromagnetic valves and the doors of all the chambers are in the opening state and the evaporation pressure of all the chambers is greater than the first set value, the situation that the environmental test equipment is not damaged due to the fact that the doors of all the chambers are opened is shown, and therefore the environmental test equipment is controlled to normally operate. The states of the electromagnetic valves and the doors of all the chambers are open states, the evaporation pressure of the current chamber is larger than a first set value, the situation that the environmental test equipment cannot be damaged when the door of the current chamber is opened is shown, the evaporation pressure of other chambers is smaller than the first set value, the door opening time of other chambers is smaller than a second set value, the situation that the environmental test equipment cannot be damaged when the doors of other chambers are opened is shown, and therefore the environmental test equipment is controlled to normally operate.

Optionally, the controlling the opening degree of the electronic expansion valve to gradually decrease to the minimum opening degree and then closing the electromagnetic valve includes: controlling the opening degree of the electronic expansion valve of the current chamber to decrease a third set value every period until the opening degree of the electronic expansion valve is decreased to the minimum opening degree of the electronic expansion valve, and controlling the electromagnetic valve of the current chamber to be closed; the third set point is greater than zero.

Specifically, the opening degree of the electronic expansion valve is decreased by the third set value every cycle, and the electronic expansion valve is directly decreased from the current opening degree to the minimum opening degree of the electronic expansion valve, so that the probability of damage to the electronic expansion valve is increased. The size of the third set value can be adjusted, and the specific numerical value can be determined according to the model of the electronic expansion valve.

Optionally, the control method for the environmental protection test device provided in the embodiment of the present invention further includes: when the evaporation pressure of the current chamber is larger than a first set value or the opening time of the door of the current chamber is smaller than a second set value, the electromagnetic valves of other chambers of the environment test equipment are all in a closed state, and the environment test equipment is controlled to normally operate.

Specifically, when the evaporation pressure of the current compartment is greater than a first set value, it is indicated that the environmental test equipment cannot be damaged when the door of the current compartment is opened, and the electromagnetic valves of other compartments are all in a closed state, and it is indicated that other compartments are not refrigerated, so that the environmental test equipment is controlled to normally operate, and a refrigeration system in the environmental test equipment continues to refrigerate for the current compartment. The door opening time of the current compartment is smaller than the second set value, which indicates that the environment test equipment cannot be damaged by the door opening time of the current compartment, so that the environment test equipment is controlled to normally operate, and a refrigeration system in the environment test equipment continues to refrigerate for the current compartment.

Optionally, the control method for the environmental protection test device provided in the embodiment of the present invention further includes: when the evaporation pressure of the current chamber is larger than a first set value or the door opening time of the current chamber is smaller than a second set value, the electromagnetic valves of other chambers of the environment test equipment are all in an open state, and the door states of other chambers are all in a closed state, so that the environment test equipment is controlled to normally operate.

Specifically, when the evaporation pressure of the current compartment is greater than a first set value, it is indicated that the environmental test equipment cannot be damaged when the door of the current compartment is opened, the electromagnetic valves of other compartments are all in an open state, the door states of other compartments are in a closed state, it is indicated that other compartments are refrigerating, and the doors of other compartments are not opened, so that the environmental test equipment cannot be damaged when the doors of other compartments are opened, and therefore, the environmental test equipment is controlled to normally operate, and a refrigerating system in the environmental test equipment continues refrigerating for all compartments. The door opening time of the current compartment is smaller than the second set value, which indicates that the door opening time of the current compartment is within the protection range of the door opening time, so that the environmental test equipment cannot be damaged, and therefore, the environmental test equipment is controlled to normally operate, and a refrigerating system in the environmental test equipment continues to refrigerate for all compartments.

Fig. 2 is a schematic structural diagram of a control system of a device for testing a protected environment according to an embodiment of the present invention, where the control system of the device for testing a protected environment according to an embodiment of the present invention includes: a control module 210, an electronic expansion valve 220, a solenoid valve 230, and an evaporation pressure sensor 240; the control module 210 is respectively connected with the electronic expansion valve 220, the solenoid valve 230 and the evaporation pressure sensor 240; the evaporation pressure sensor 240 is configured to detect an evaporation pressure of the current chamber and send the detected evaporation pressure of the current chamber to the control module 210; the control module 210 is configured to obtain a state of the solenoid valve 230 of the current compartment; the control module 210 is configured to obtain a door state of the current compartment if the electromagnetic valve 230 of the current compartment is in an open state; the control module 210 is configured to obtain an evaporation pressure of the current compartment if the door state of the current compartment is an open state; the control module 210 is configured to compare the evaporation pressure of the current chamber with a first set value, where the first set value is greater than zero; the control module 210 is configured to compare the door opening time of the current chamber with a second set value if the evaporation pressure of the current chamber is smaller than the first set value, where the second set value is greater than zero; the control module 210 is configured to control the environmental test equipment to stop or control the opening degree of the electronic expansion valve 220 of the current compartment to gradually decrease to a minimum opening degree and then control the electromagnetic valve 230 of the current compartment to close if the door opening time of the current compartment is greater than a second set value.

Specifically, the control module 210 includes a timer and a comparator, when the door of the front compartment is opened, the timer in the control module 210 will count time and send the counted time to the comparator, and the comparator is used to compare the time counted by the timer with the second set time. When the door state of the current compartment is changed from the open state to the closed state within the second set time range, the environmental test equipment normally operates, and the timer counts again when the door state of the current compartment is the open state next time. When the doors of the other compartments are opened, the timer in the control module 210 will also count and send the counted time to the comparator. There is one evaporation pressure sensor 240 for each chamber in the environmental test apparatus.

The control system of the environmental protection test device provided by this embodiment and the control method of the environmental protection test device provided by any embodiment of the present invention belong to the same inventive concept, and have corresponding beneficial effects.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will appreciate that the embodiments of the present invention are not limited to the specific embodiments described herein, and that various obvious changes, adaptations, and substitutions are possible, without departing from the scope of the embodiments of the present invention. Therefore, although the embodiments of the present invention have been described in more detail through the above embodiments, the embodiments of the present invention are not limited to the above embodiments, and many other equivalent embodiments may be included without departing from the concept of the embodiments of the present invention, and the scope of the embodiments of the present invention is determined by the scope of the appended claims.