CN116841336B - Control method, device and system of test box and test box - Google Patents
Control method, device and system of test box and test box Download PDFInfo
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- CN116841336B CN116841336B CN202310806615.2A CN202310806615A CN116841336B CN 116841336 B CN116841336 B CN 116841336B CN 202310806615 A CN202310806615 A CN 202310806615A CN 116841336 B CN116841336 B CN 116841336B
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- 238000012360 testing method Methods 0.000 title claims abstract description 174
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000001704 evaporation Methods 0.000 claims abstract description 48
- 230000001105 regulatory effect Effects 0.000 claims abstract description 43
- 230000008020 evaporation Effects 0.000 claims abstract description 34
- 230000001276 controlling effect Effects 0.000 claims abstract description 24
- 238000004364 calculation method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
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Abstract
The embodiment of the invention discloses a control method, a device and a system of a test box and the test box. The control method of the test box comprises the following steps: acquiring the temperature and humidity of a target test box; determining the dew point temperature of the target test box according to the temperature and the humidity; determining a control mode of the target test box according to the dew point temperature; and controlling the working states of the evaporation pressure regulating valve and the frosted electromagnetic valve in the target test box according to the control mode. The control method, the device and the system of the test box and the test box provided by the embodiment of the invention can improve the control reliability.
Description
Technical Field
The embodiment of the invention relates to an automatic control technology, in particular to a control method, a device and a system of a test box and the test box.
Background
Equipment or products requiring temperature and humidity are typically placed in a test chamber such as an environmental test chamber for testing. The temperature and humidity of the test box are adjustable, so that the test requirements of different temperatures and humidity of equipment or products are met. Meanwhile, in order to ensure the normal operation of the test box, the test box needs to be reliably controlled.
At present, the existing control method of the test box generally only performs frost control or frost-free control on the test box according to set temperature and humidity, for example, when the humidity reaches a certain value, the control blind area exists in the mode of performing frost control on the test box, and when the temperature is higher and the humidity reaches a certain value, the problem of lower control reliability exists because the frost control is still adopted.
Disclosure of Invention
The embodiment of the invention provides a control method, a device and a system of a test box and the test box, so as to improve control reliability.
In a first aspect, an embodiment of the present invention provides a control method for a test chamber, including:
Acquiring the temperature and humidity of a target test box;
Determining the dew point temperature of the target test box according to the temperature and the humidity;
Determining a control mode of the target test box according to the dew point temperature;
And controlling the working states of the evaporation pressure regulating valve and the frosted electromagnetic valve in the target test box according to the control mode.
According to the control method of the test box, the control mode of the target test box is determined according to the dew point temperature, and the working states of the evaporation pressure regulating valve and the frosted electromagnetic valve in the target test box are controlled according to the control mode, so that the frosted mode and the frostless mode of the test box are controlled through the dew point temperature, the problem that when the humidity reaches a certain value, the test box is subjected to frosted control in the prior art is solved, and when the temperature is higher, frostless control can be still adopted, the problem of lower control reliability exists, and the control reliability is improved.
Optionally, determining the control mode of the target test chamber according to the dew point temperature includes:
when the difference value of the dew point temperature and the preset dew point temperature deviation value is larger than or equal to a preset threshold value, determining that the control mode of the target test box is a frostless mode;
And when the difference value between the dew point temperature and the preset dew point temperature deviation value is smaller than the preset threshold value, determining that the control mode of the target test box is a frosted mode.
Optionally, the preset dew point temperature deviation value is 10 ℃, and the preset threshold value is-5 ℃.
Optionally, according to the control mode, controlling the on-off of the evaporating pressure regulating valve and the frosted electromagnetic valve in the target test box comprises:
When the control mode is a frostless mode and the pressure of the evaporating pressure regulating valve reaches a preset pressure value, the evaporating pressure regulating valve is controlled to be opened;
When the control mode is a frosted mode and the humidity reaches a preset humidity value, the frosted electromagnetic valve is controlled to be conducted.
Optionally, controlling the opening of the evaporating pressure regulating valve includes:
and controlling the evaporation pressure regulating valve to be opened, and simultaneously controlling the frosted electromagnetic valve to be in a closing state.
Optionally, determining the dew point temperature of the target test chamber according to the temperature and the humidity includes:
Substituting the temperature and the humidity into a preset dew point temperature calculation formula according to the temperature and the humidity to obtain a calculated value;
The calculated value is taken as the dew point temperature of the target test chamber.
In a second aspect, an embodiment of the present invention provides a control device for a test chamber, including:
The information acquisition module is used for acquiring the temperature and the humidity of the target test box;
the temperature determining module is used for determining the dew point temperature of the target test box according to the temperature and the humidity;
The mode determining module is used for determining a control mode of the target test box according to the dew point temperature;
And the state control module is used for controlling the working states of the evaporation pressure regulating valve and the frosted electromagnetic valve in the target test box according to the control mode.
In a third aspect, an embodiment of the present invention provides a control system for a test chamber, including a temperature sensor, a humidity sensor, and a controller, where the temperature sensor and the humidity sensor are electrically connected to the controller, and a control device for the test chamber according to the second aspect is integrated in the controller.
Optionally, the control system of the test box further comprises a compressor, an evaporator, a condenser, an evaporation pressure regulating valve and a frosted electromagnetic valve; one end of the compressor is communicated with the inlet of the evaporator through the condenser, the outlet of the evaporator is communicated with the other end of the compressor through a pipeline, and the evaporation pressure regulating valve and the frosted electromagnetic valve are arranged at positions, close to the outlet of the evaporator, in the pipeline; the compressor and the frosted electromagnetic valve are electrically connected with the controller.
In a fourth aspect, embodiments of the present invention provide a test chamber controlled by a control system as described in the third aspect.
The control method, the device and the system for the test box and the test box provided by the embodiment of the invention comprise the following steps: acquiring the temperature and humidity of a target test box; determining the dew point temperature of the target test box according to the temperature and the humidity; determining a control mode of the target test box according to the dew point temperature; and controlling the working states of the evaporation pressure regulating valve and the frosted electromagnetic valve in the target test box according to the control mode. According to the control method, the device and the system for the test box, and the test box, the control mode of the target test box is determined according to the dew point temperature, and the working states of the evaporation pressure regulating valve and the frosted electromagnetic valve in the target test box are controlled according to the control mode, so that the frosted mode and the frostless mode of the test box are controlled through the dew point temperature, the problem that when the humidity reaches a certain value, the test box is subjected to frosted control, and when the temperature is higher, the problem that the frosted control is lower in control reliability is still adopted, is solved, and the control reliability is improved.
Drawings
FIG. 1 is a flow chart of a control method of a test chamber according to a first embodiment of the present invention;
FIG. 2 is a flow chart of a control method of a test chamber according to a second embodiment of the present invention;
FIG. 3 is a block diagram of a control device for a test chamber according to a third embodiment of the present invention;
FIG. 4 is a block diagram of a control system for a test chamber according to a third embodiment of the present invention;
Fig. 5 is a schematic structural diagram of a control system of a test chamber according to a third embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Example 1
Fig. 1 is a flowchart of a control method of a test chamber according to a first embodiment of the present invention, where the method may be applied to control of the test chamber, and the method may be performed by a control device of the test chamber, where the device may be implemented in software and/or hardware, and where the device may be integrated in a controller of a control system of the test chamber, and the method specifically includes the following steps:
and 110, acquiring the temperature and the humidity of the target test chamber.
The target test box can be an environment test box and can be used for carrying out temperature and humidity detection on equipment or products with requirements on temperature and humidity. The control system of the target test chamber may include a temperature sensor and a humidity sensor, which may be disposed in the target test chamber for detecting the temperature and humidity of the target test chamber, respectively. The control device of the test chamber can be electrically connected with the temperature sensor and the humidity sensor so as to acquire the temperature and the humidity of the target test chamber.
And 120, determining the dew point temperature of the target test chamber according to the temperature and the humidity.
Specifically, when the temperature and the humidity are known, the dew point temperature can be determined, and a common calculation method for determining the dew point temperature through the temperature and the humidity can refer to the prior art, which is not described herein.
And 130, determining a control mode of the target test box according to the dew point temperature.
Specifically, if the difference between the dew point temperature and the preset dew point temperature deviation value is greater than or equal to a preset threshold value, the control mode of the target test box can be determined to be a frostless mode, and if the difference between the dew point temperature and the preset dew point temperature deviation value is less than the preset threshold value, the control mode of the target test box can be determined to be a frosted mode.
And 140, controlling working states of the evaporation pressure regulating valve and the frosted electromagnetic valve in the target test box according to the control mode.
Specifically, when the control mode of the target test chamber is the frostless mode, if the pressure of the evaporating pressure regulating valve reaches a preset pressure value, the evaporating pressure regulating valve is opened. When the control mode of the target test box is a frosted mode, if the humidity reaches a preset humidity value, the frosted electromagnetic valve is controlled to be conducted, so that the frosted mode and the frostless mode of the test box are controlled.
The control method of the test box provided by the embodiment comprises the following steps: acquiring the temperature and humidity of a target test box; determining the dew point temperature of the target test box according to the temperature and the humidity; determining a control mode of the target test box according to the dew point temperature; and controlling the working states of the evaporation pressure regulating valve and the frosted electromagnetic valve in the target test box according to the control mode. According to the control method of the test box, the control mode of the target test box is determined according to the dew point temperature, and the working states of the evaporation pressure regulating valve and the frosted electromagnetic valve in the target test box are controlled according to the control mode, so that the frosted mode and the frostless mode of the test box are controlled through the dew point temperature, the problem that the control reliability is low when the humidity reaches a certain value in the prior art is solved, and the problem that the control reliability is improved because the frosted control is still adopted when the temperature is higher is solved.
Example two
Fig. 2 is a flowchart of a control method of a test chamber according to a second embodiment of the present invention, where the method may be applied to control of the test chamber, and the method may be performed by a control device of the test chamber, where the device may be implemented in software and/or hardware, and where the device may be integrated in a controller of a control system of the test chamber, and the method specifically includes the following steps:
step 210, acquiring the temperature and humidity of the target test chamber.
The target test box can be an environment test box and can be used for carrying out temperature and humidity detection on equipment or products with requirements on temperature and humidity. The control system of the target test chamber may include a temperature sensor and a humidity sensor, which may be disposed in the target test chamber for detecting the temperature and humidity of the target test chamber, respectively. The control device of the test chamber can be electrically connected with the temperature sensor and the humidity sensor so as to acquire the temperature and the humidity of the target test chamber.
And 220, substituting the temperature and the humidity into a preset dew point temperature calculation formula according to the temperature and the humidity to obtain a calculated value.
And 230, taking the calculated value as the dew point temperature of the target test chamber.
And step 240, when the difference value between the dew point temperature and the preset dew point temperature deviation value is greater than or equal to a preset threshold value, determining that the control mode of the target test chamber is a frostless mode.
Illustratively, the preset dew point temperature bias value is 10 ℃ and the preset threshold value is-5 ℃. Taking the temperature of the target test box as 70 ℃ and the humidity as 10% RH as an example, the dew point temperature is 24.73 ℃,24.73 ℃ -10 ℃ and 5 ℃ can be calculated at the moment, the control mode of the target test box can be determined to be a frostless mode, and the target test box needs to operate in the frostless mode.
It should be noted that, the specific values of the preset dew point temperature deviation value and the preset threshold are only illustrative, and may be specifically determined according to the actual control requirement, which is not limited herein.
And 250, determining that the control mode of the target test box is a frosted mode when the difference value between the dew point temperature and the preset dew point temperature deviation value is smaller than a preset threshold value.
Specifically, taking the temperature of the target test box as 40 ℃ and the humidity as 10% RH as an example, the dew point temperature can be calculated to be 2.63 ℃ and 2.63 ℃ -10 ℃ below zero-5 ℃, the control mode of the target test box can be determined to be a frosted mode, and the target test box needs to operate in the frosted mode.
Step 260, when the control mode is the frostless mode and the pressure of the evaporating pressure regulating valve reaches the preset pressure value, the evaporating pressure regulating valve is controlled to be opened.
The preset pressure value is, for example, 4bar, and the evaporating pressure regulating valve is opened when the pressure of the evaporating pressure regulating valve reaches the preset pressure value, at which time the frosted electromagnetic valve can be controlled to be in an off state.
Step 270, when the control mode is the frosted mode and the humidity reaches the preset humidity value, controlling the frosted electromagnetic valve to be turned on.
Illustratively, the preset humidity value is 27% RH, and the evaporating pressure regulating valve is in an off state when the frosted solenoid valve is controlled to be on.
According to the control method of the test box, the dew point temperature of the target test box is determined according to the acquired temperature and humidity, when the difference value between the dew point temperature and the preset dew point temperature deviation value is larger than or equal to the preset threshold value, the control mode of the target test box is determined to be a frostless mode, when the difference value between the dew point temperature and the preset dew point temperature deviation value is smaller than the preset threshold value, the control mode of the target test box is determined to be a frosted mode, when the control mode is the frostless mode, the evaporation pressure regulating valve is controlled to be opened when the pressure of the evaporation pressure regulating valve reaches the preset pressure value, and when the control mode is the frosted mode, and the humidity reaches the preset humidity value, the frosted electromagnetic valve is controlled to be conducted. According to the control method for the test box, the control of the frosted mode and the frostless mode of the test box is achieved by determining the dew point temperature, the problem that the control reliability is low when the temperature is higher and the frosted control is still adopted at the moment when the humidity reaches a certain value in the prior art is solved, and therefore the control reliability is improved.
Example III
Fig. 3 is a block diagram of a control device for a test chamber according to a third embodiment of the present invention. The control device of the test chamber comprises: an information acquisition module 310, a temperature determination module 320, a mode determination module 330, and a state control module 340; the information acquisition module 310 is used for acquiring the temperature and the humidity of the target test box; the temperature determining module 320 is configured to determine a dew point temperature of the target test chamber according to the temperature and the humidity; the mode determining module 330 is configured to determine a control mode of the target test chamber according to the dew point temperature; the state control module 340 is used for controlling the working states of the evaporation pressure regulating valve and the frosted electromagnetic valve in the target test box according to the control mode.
On the basis of the above embodiment, the mode determining module 330 includes: a frostless mode determining unit and a frosted mode determining unit; the frostless mode determining unit is used for determining that the control mode of the target test box is a frostless mode when the difference value of the dew point temperature and the preset dew point temperature deviation value is larger than or equal to a preset threshold value; the frosted mode determining unit is used for determining that the control mode of the target test box is a frosted mode when the difference value of the dew point temperature and the preset dew point temperature deviation value is smaller than a preset threshold value. Wherein the preset dew point temperature deviation value is 10 ℃, and the preset threshold value is-5 ℃.
In one embodiment, the state control module 340 includes: a first control unit and a second control unit; the first control unit is used for controlling the evaporation pressure regulating valve to be opened when the control mode is a frostless mode and the pressure of the evaporation pressure regulating valve reaches a preset pressure value; the second control unit is used for controlling the conduction of the frosted electromagnetic valve when the control mode is the frosted mode and the humidity reaches a preset humidity value.
Optionally, the first control unit is specifically configured to control the evaporation pressure regulating valve to be opened, and simultaneously control the frosted electromagnetic valve to be in a closed state.
Optionally, the temperature determination module 320 includes: a calculation unit and a temperature determination unit; the calculating unit is used for substituting the temperature and the humidity into a preset dew point temperature calculating formula according to the temperature and the humidity to obtain a calculated value; the temperature determining unit is used for taking the calculated value as the dew point temperature of the target test chamber.
Fig. 4 is a block diagram of a control system of a test chamber according to a third embodiment of the present invention. Referring to fig. 4, the control system of the test chamber includes a temperature sensor 10, a humidity sensor 20 and a controller 30, wherein the temperature sensor 10 and the humidity sensor 20 are electrically connected to the controller 30, and the control device of the test chamber according to any embodiment of the present invention is integrated in the controller 30.
The controller 30 may determine the dew point temperature of the test chamber according to the temperature collected by the temperature sensor 10 and the humidity collected by the humidity sensor 20, and determine the control mode of the test chamber according to the dew point temperature, and further control the working states of the evaporation pressure regulating valve and the frosted electromagnetic valve in the test chamber according to the control mode.
Optionally, the control system of the test chamber further comprises a compressor 40, an evaporator 50, a condenser 60, an evaporation pressure regulating valve KVP, and a frosted electromagnetic valve SV; one end of the compressor 40 is communicated with the inlet of the evaporator 50 through a condenser 60, the outlet of the evaporator 50 is communicated with the other end of the compressor 40 through a pipeline, and an evaporation pressure regulating valve KVP and a frosted electromagnetic valve SV are both arranged at positions, close to the outlet of the evaporator 50, in the pipeline; the compressor 40 and the frosted solenoid valve SV are electrically connected to the controller 30.
Fig. 5 is a schematic structural diagram of a control system of a test chamber according to a third embodiment of the present invention. Referring to fig. 5, the controller 30 may control the operation state of the compressor 40, when the control system of the test chamber needs to operate, the controller 30 controls the compressor 40 to operate, when the controller 30 determines that the test chamber is in the frostless mode according to the temperature and the humidity, if the pressure of the evaporating pressure regulating valve KVP reaches the preset pressure value, the evaporating pressure regulating valve KVP is opened to ensure that the inside of the evaporator 50 has higher evaporating pressure, so that the surface temperature of the evaporator 50 is not too low, and water drops on the surface of the evaporator 50 are not substantially frosted. When the controller 30 determines that the test chamber is in the frosted mode according to the temperature and the humidity, if the humidity of the test chamber reaches the preset humidity value, the frosted electromagnetic valve SV is controlled to be turned on, and the refrigerant in the evaporator 50 is transmitted to the compressor 40 through the passage where the frosted electromagnetic valve SV is located, so that the evaporation pressure in the evaporator 50 is reduced, and at this time, the evaporation temperature of the evaporator 50 is also lower, and water drops on the surface of the evaporator are likely to frost.
The embodiment of the invention provides a test box which is controlled by the control system according to any embodiment of the invention.
The control device and system of the test box and the control method of the test box provided by any embodiment of the invention belong to the same inventive concept, have corresponding beneficial effects, and the detailed technical details of the embodiment are not shown in the control method of the test box provided by any embodiment of the invention.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (8)
1. A method of controlling a test chamber, comprising:
Acquiring the temperature and humidity of a target test box;
Determining a dew point temperature of the target test chamber according to the temperature and the humidity;
Determining a control mode of the target test chamber according to the dew point temperature;
according to the control mode, controlling working states of an evaporation pressure regulating valve and a frosted electromagnetic valve in the target test box;
the method for determining the control mode of the target test box according to the dew point temperature comprises the following steps:
When the difference value of the dew point temperature and the preset dew point temperature deviation value is larger than or equal to a preset threshold value, determining that the control mode of the target test box is a frostless mode;
when the difference value between the dew point temperature and the preset dew point temperature deviation value is smaller than a preset threshold value, determining that the control mode of the target test box is a frosted mode;
according to the control mode, the on-off of the evaporation pressure regulating valve and the frosted electromagnetic valve in the target test box is controlled, and the method comprises the following steps:
when the control mode is a frostless mode and the pressure of the evaporation pressure regulating valve reaches a preset pressure value, controlling the evaporation pressure regulating valve to be opened;
and when the control mode is a frosted mode and the humidity reaches a preset humidity value, controlling the frosted electromagnetic valve to be conducted.
2. The method of claim 1, wherein the predetermined dew point temperature deviation value is 10 ℃ and the predetermined threshold value is-5 ℃.
3. The control method of a test chamber according to claim 1, wherein said controlling the opening of the evaporation pressure adjustment valve comprises:
and controlling the evaporation pressure regulating valve to be opened, and simultaneously controlling the frosted electromagnetic valve to be in a closing state.
4. The method of claim 1, wherein determining the dew point temperature of the target test chamber based on the temperature and the humidity comprises:
substituting the temperature and the humidity into a preset dew point temperature calculation formula according to the temperature and the humidity to obtain a calculated value;
The calculated value is taken as the dew point temperature of the target test chamber.
5. A control device for a test chamber, comprising:
The information acquisition module is used for acquiring the temperature and the humidity of the target test box;
The temperature determining module is used for determining the dew point temperature of the target test box according to the temperature and the humidity;
the mode determining module is used for determining a control mode of the target test box according to the dew point temperature;
the state control module is used for controlling the working states of the evaporation pressure regulating valve and the frosted electromagnetic valve in the target test box according to the control mode;
The mode determination module includes:
The frostless mode determining unit is used for determining that the control mode of the target test box is a frostless mode when the difference value of the dew point temperature and the preset dew point temperature deviation value is larger than or equal to a preset threshold value;
The frosted mode determining unit is used for determining that the control mode of the target test box is a frosted mode when the difference value of the dew point temperature and the preset dew point temperature deviation value is smaller than a preset threshold value;
the state control module includes:
the first control unit is used for controlling the evaporation pressure regulating valve to be opened when the control mode is a frostless mode and the pressure of the evaporation pressure regulating valve reaches a preset pressure value;
and the second control unit is used for controlling the conduction of the frosted electromagnetic valve when the control mode is a frosted mode and the humidity reaches a preset humidity value.
6. A control system for a test chamber, comprising a temperature sensor, a humidity sensor and a controller, wherein the temperature sensor and the humidity sensor are electrically connected to the controller, and a control device for the test chamber according to claim 5 is integrated in the controller.
7. The control system of the test chamber of claim 6, further comprising a compressor, an evaporator, a condenser, an evaporation pressure regulator valve, a frosted solenoid valve; one end of the compressor is communicated with the inlet of the evaporator through the condenser, the outlet of the evaporator is communicated with the other end of the compressor through a pipeline, and the evaporation pressure regulating valve and the frost-containing electromagnetic valve are arranged at positions, close to the outlet of the evaporator, in the pipeline; the compressor and the frosted electromagnetic valve are electrically connected with the controller.
8. A test chamber, characterized in that the test chamber is controlled by a control system according to any of claims 6-7.
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| CN202310806615.2A CN116841336B (en) | 2023-07-03 | 2023-07-03 | Control method, device and system of test box and test box |
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| CN202310806615.2A CN116841336B (en) | 2023-07-03 | 2023-07-03 | Control method, device and system of test box and test box |
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| KR102464341B1 (en) * | 2022-02-15 | 2022-11-10 | 주식회사 로드맵 | Automatic defrosting method of delivery vehicle for cold chain |
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| CN107051595A (en) * | 2017-05-10 | 2017-08-18 | 上海林频仪器股份有限公司 | A kind of low humidity humiture test box |
| CN115963866A (en) * | 2023-01-10 | 2023-04-14 | 江苏拓米洛高端装备股份有限公司 | Evaporation pressure adjusting system and method |
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