CN115981389A - Control method and device of temperature regulating system and environmental test chamber - Google Patents
Control method and device of temperature regulating system and environmental test chamber Download PDFInfo
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Abstract
The embodiment of the invention discloses a control method and device of a temperature regulating system and an environmental test chamber. The temperature adjusting system comprises a constant temperature subsystem and a cooling subsystem, and the constant temperature subsystem and the cooling subsystem are used for adjusting the temperature of the environmental test chamber; the control method of the temperature regulating system comprises the following steps: acquiring the ambient temperature and the temperature regulation requirement of an environmental test chamber; if the temperature regulation requirement is a temperature reduction requirement, controlling at least one of the constant temperature subsystem and the temperature reduction subsystem to work according to the ambient temperature and a preset target temperature; and if the temperature regulation requirement is a constant temperature requirement, controlling the constant temperature subsystem or the cooling subsystem to work according to the ambient temperature and the preset target temperature. The control method and device for the temperature regulating system and the environmental test chamber provided by the embodiment of the invention can realize energy-saving operation of the temperature regulating system and reduce the use cost of a user.
Description
Technical Field
The embodiment of the invention relates to a temperature control technology, in particular to a control method and device of a temperature regulating system and an environmental test chamber.
Background
The environmental test chamber such as a water-cooled high-low temperature environmental test chamber can be used for temperature and humidity environmental test and high-low temperature cycle test, so that the temperature of the environmental test chamber needs to be adjusted. The temperature adjusting system of the environmental test chamber can control the temperature of the environmental test chamber so as to meet the actual temperature requirement.
At present, in the control method of the existing temperature regulating system, when the temperature regulating system regulates the temperature of the environmental test chamber, the temperature is usually regulated according to the maximum load of the environmental test chamber, and the load of the environmental test chamber in most of time is far less than the maximum load, so that the energy consumption of the temperature regulating system is large, and the energy conservation is not facilitated.
Disclosure of Invention
The embodiment of the invention provides a control method and device of a temperature regulating system and an environmental test chamber, which are used for realizing energy-saving operation of the temperature regulating system and reducing the use cost of a user.
In a first aspect, an embodiment of the present invention provides a method for controlling a temperature adjustment system, where the temperature adjustment system includes a constant temperature subsystem and a temperature reduction subsystem, both the constant temperature subsystem and the temperature reduction subsystem are used to adjust the temperature of an environmental test chamber, and the method includes:
acquiring the ambient temperature and the temperature regulation requirement of an environmental test chamber;
if the temperature regulation requirement is a temperature reduction requirement, controlling at least one of the constant temperature subsystem and the temperature reduction subsystem to work according to the ambient temperature and a preset target temperature;
and if the temperature regulation requirement is a constant temperature requirement, controlling the constant temperature subsystem or the cooling subsystem to work according to the ambient temperature and the preset target temperature.
Optionally, controlling at least one of the constant temperature subsystem and the cooling subsystem to operate according to the ambient temperature and the preset target temperature, including:
when the preset target temperature is higher than the ambient temperature and the difference value between the preset target temperature and the ambient temperature is higher than a preset first threshold value, controlling the constant-temperature subsystem to work and controlling the cooling subsystem to stop working;
and when the preset target temperature is higher than the ambient temperature, the difference value between the preset target temperature and the ambient temperature is less than or equal to a preset first threshold value, and the preset target temperature is higher than a preset second threshold value, controlling the constant-temperature subsystem and the cooling subsystem to work.
Optionally, the method further includes:
and when the preset target temperature is smaller than a preset second threshold value, controlling the constant-temperature subsystem and the cooling subsystem to work.
Optionally, the control constant temperature subsystem and the cooling subsystem all work, including:
and controlling the opening degree of an electronic expansion valve at the inlet of the evaporator in the constant temperature subsystem to be larger than zero, and controlling the opening degree of the electronic expansion valve at the inlet of the evaporator in the cooling subsystem to be larger than zero.
Optionally, the constant temperature subsystem is controlled to work, and the cooling subsystem is controlled to stop working, including:
and controlling the opening degree of an electronic expansion valve at the inlet of the evaporator in the constant temperature subsystem to increase and then decrease, and controlling the opening degree of the electronic expansion valve at the inlet of the evaporator in the cooling subsystem to be zero.
Optionally, the control of the constant temperature subsystem or the cooling subsystem according to the ambient temperature and the preset target temperature includes:
when the preset target temperature is higher than the ambient temperature, the difference value between the preset target temperature and the ambient temperature is smaller than or equal to a preset first threshold value, and the preset target temperature is higher than a preset second threshold value, controlling the constant-temperature subsystem to work, and controlling the cooling subsystem to stop working;
and when the preset target temperature is smaller than a preset second threshold value, controlling the constant-temperature subsystem to stop working and controlling the cooling subsystem to work.
In a second aspect, an embodiment of the present invention provides a control device for a temperature adjustment system, where the temperature adjustment system includes a constant temperature subsystem and a temperature reduction subsystem, and the temperature adjustment system is used to adjust the temperature of an environmental test chamber;
the control device includes:
the information acquisition module is used for acquiring the ambient temperature and the temperature regulation requirement of the environmental test chamber;
the first control module is used for controlling at least one of the constant temperature subsystem and the cooling subsystem to work according to the ambient temperature and a preset target temperature if the temperature regulation requirement is the cooling requirement;
and the second control module is used for controlling the constant-temperature subsystem or the cooling subsystem to work according to the ambient temperature and the preset target temperature if the temperature regulation requirement is the constant-temperature requirement.
Optionally, the first control module includes:
the first control unit is used for controlling the constant-temperature subsystem to work and controlling the cooling subsystem to stop working when the preset target temperature is higher than the ambient temperature and the difference value between the preset target temperature and the ambient temperature is higher than a preset first threshold value;
and the second control unit is used for controlling the constant-temperature subsystem and the cooling subsystem to work when the preset target temperature is higher than the ambient temperature, the difference value between the preset target temperature and the ambient temperature is less than or equal to a preset first threshold value, and the preset target temperature is higher than a preset second threshold value.
In a third aspect, an embodiment of the present invention provides an environmental test chamber, which includes a control system and the temperature adjustment system as described in the first aspect and the second aspect, where the control system is electrically connected to the temperature adjustment system, and the control system includes the control device as described in the second aspect.
Optionally, the control system includes a controller and a touch screen, the controller is electrically connected to the touch screen, and the control device according to the second aspect is integrated in the controller.
According to the control method and device for the temperature regulating system and the environmental test chamber, the temperature regulating system comprises the constant temperature subsystem and the cooling subsystem, the constant temperature subsystem and the cooling subsystem are both used for regulating the temperature of the environmental test chamber, and the ambient temperature and the temperature regulating requirement of the environmental test chamber are obtained; if the temperature regulation requirement is a temperature reduction requirement, controlling at least one of the constant temperature subsystem and the temperature reduction subsystem to work according to the ambient temperature and a preset target temperature; and if the temperature regulation requirement is a constant temperature requirement, controlling the constant temperature subsystem or the cooling subsystem to work according to the ambient temperature and the preset target temperature. According to the control method and device for the temperature regulating system and the environmental test chamber, the constant temperature subsystem and/or the cooling subsystem are controlled to work according to the ambient temperature and the temperature regulating requirement, when the temperature regulating requirement is the constant temperature requirement, the constant temperature subsystem or the cooling subsystem is controlled to work, the problem of high energy consumption caused by the fact that the constant temperature subsystem and the cooling subsystem work can be solved, energy-saving operation of the temperature regulating system is achieved, and use cost of users is reduced.
Drawings
Fig. 1 is a flowchart of a control method of a temperature adjustment system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a temperature regulating system according to an embodiment of the present invention;
fig. 3 is a flowchart of a control method of a temperature adjustment system according to a second embodiment of the present invention;
FIG. 4 is a schematic diagram of a cooling mode provided in the second embodiment of the present invention;
FIG. 5 is a schematic view of another cooling mode provided in accordance with the second embodiment of the present invention;
FIG. 6 is a schematic view of another cooling mode provided in the second embodiment of the present invention;
fig. 7 is a flowchart of a control device of a temperature adjustment system according to a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of a control method of a temperature adjustment system according to an embodiment of the present invention. The method can be applied to the aspects of temperature regulation system control and the like, the method can be executed by a control device of the temperature regulation system, the device can be realized in a software and/or hardware mode, the device can be integrated in a controller of a control system of an environmental test chamber, the temperature regulation system comprises a constant temperature subsystem and a cooling subsystem, and the constant temperature subsystem and the cooling subsystem are used for regulating the temperature of the environmental test chamber; the method specifically comprises the following steps:
and 110, acquiring the ambient temperature and the temperature regulation requirement of the environmental test chamber.
Wherein, environmental test case can be provided with temperature sensor around, and temperature regulating system's controlling means can be connected with temperature sensor electricity to acquire environmental test case's ambient temperature, the demand that adjusts the temperature can be external input to controlling means.
And 120, if the temperature regulation requirement is a temperature reduction requirement, controlling at least one of the constant temperature subsystem and the temperature reduction subsystem to work according to the ambient temperature and the preset target temperature.
Specifically, if the temperature difference between the preset target temperature and the ambient temperature is greater than a preset value, such as 60 degrees, the constant temperature subsystem is controlled to work, and the cooling subsystem stops working, and if the preset target temperature is less than another preset value, such as-25 degrees, both the constant temperature subsystem and the cooling subsystem are controlled to work.
Fig. 2 is a schematic structural diagram of a temperature adjusting system according to a first embodiment of the present invention. Referring to fig. 2, taking a cooling system as an example, the cooling system includes a compressor, a condenser, an evaporator, an electronic expansion valve, a heater, a circulating fan, a cooling water circulating pump, an electromagnetic valve, a capillary tube, and the like. The working principle of the refrigerating system is as follows: high-temperature high-pressure gaseous refrigerant at the outlet of the compressor CM enters the condenser COND to be condensed and then becomes liquid refrigerant, is throttled and decompressed to the inlet of the evaporator EVAP through the electronic expansion valve KV, and is gasified and absorbs heat in the evaporator EVAP for refrigeration. The system is provided with a heater, and when the room temperature approaches to the target temperature, the PID control of the heater is started to carry out heat load hedging adjustment so as to realize accurate temperature control in the box. In a refrigerating state, the electronic expansion valve KV can dynamically adjust the opening degree according to the superheat degree of the outlet of the evaporator. When the external load is small, the superheat degree of the outlet of the evaporator is reduced, and the operation working condition of low refrigeration output or even zero refrigeration output of the refrigeration system can appear, so that a hot gas bypass loop is formed by combining the hot gas bypass electromagnetic valves SV1 and SV2 and the hot gas bypass capillaries CAP1 and CAP2 to unload the energy of the refrigeration system and maintain the lowest suction pressure of the system. The cold air bypass solenoid valve SV3 and the cold air bypass capillary tube CAP3 are combined into a cold air bypass loop, so that the reasonable air suction temperature of the compressor can be maintained, and the air suction overheating of the compressor is avoided. In addition, the working principle of the constant temperature system is basically the same as that of the cooling system, and reference can be made to the working principle of the cooling system, which is not described herein again.
And step 130, if the temperature regulation requirement is a constant temperature requirement, controlling the constant temperature subsystem or the cooling subsystem to work according to the ambient temperature and the preset target temperature.
Specifically, if the temperature difference between the preset target temperature and the ambient temperature is greater than a preset value, such as 60 degrees, the constant temperature subsystem is controlled to work, and the cooling subsystem stops working, and if the preset target temperature is less than another preset value, such as-25 degrees, the constant temperature subsystem is controlled to stop working, and the cooling subsystem works.
According to the control method of the temperature adjusting system provided by the embodiment, the temperature adjusting system comprises a constant temperature subsystem and a cooling subsystem, the constant temperature subsystem and the cooling subsystem are both used for adjusting the temperature of the environmental test box, and the ambient temperature and the temperature adjusting requirement of the environmental test box are obtained; if the temperature regulation requirement is a temperature reduction requirement, controlling at least one of the constant temperature subsystem and the temperature reduction subsystem to work according to the ambient temperature and a preset target temperature; and if the temperature regulation requirement is a constant temperature requirement, controlling the constant temperature subsystem or the cooling subsystem to work according to the ambient temperature and the preset target temperature. According to the control method of the temperature regulating system, the constant temperature subsystem and/or the cooling subsystem are controlled to work according to the ambient temperature and the temperature regulating requirement, when the temperature regulating requirement is the constant temperature requirement, the constant temperature subsystem or the cooling subsystem is controlled to work, the problem of high energy consumption caused by the fact that the constant temperature subsystem and the cooling subsystem work can be solved, energy-saving operation is achieved, and the use cost of a user is reduced.
Example two
Fig. 3 is a flowchart of a control method of a temperature adjustment system according to a second embodiment of the present invention. The method can be applied to the aspects of temperature regulation system control and the like, the method can be executed by a control device of the temperature regulation system, the device can be realized in a software and/or hardware mode, the device can be integrated in a controller of a control system of an environmental test chamber, the temperature regulation system comprises a constant temperature subsystem and a cooling subsystem, and the constant temperature subsystem and the cooling subsystem are used for regulating the temperature of the environmental test chamber; the method specifically comprises the following steps:
and step 210, acquiring the ambient temperature and the temperature regulation requirement of the environmental test chamber.
And step 220, if the temperature regulation requirement is a temperature reduction requirement, controlling the constant temperature subsystem to work and controlling the temperature reduction subsystem to stop working when the preset target temperature is higher than the ambient temperature and the difference value between the preset target temperature and the ambient temperature is higher than a preset first threshold value.
Illustratively, the preset first threshold value is 60, the preset target temperature TS is greater than the ambient temperature TA, and TS > TA +60, the constant temperature subsystem is controlled to operate, and the cooling subsystem is controlled to stop operating. Specifically, the opening of the electronic expansion valve at the inlet of the evaporator in the controllable constant-temperature subsystem is increased and then decreased, and the opening of the electronic expansion valve at the inlet of the evaporator in the controllable cooling subsystem is controlled to be zero. Fig. 4 is a schematic diagram of a cooling mode according to a second embodiment of the present invention. Referring to fig. 4, the opening degree of the electronic expansion valve at the inlet of the evaporator in the cooling subsystem is zero, and the opening degree of the electronic expansion valve at the inlet of the evaporator in the thermostatic subsystem is increased and then decreased, and finally stabilized at a value greater than zero.
And step 230, if the temperature regulation requirement is a temperature reduction requirement, when the preset target temperature is higher than the ambient temperature, the difference value between the preset target temperature and the ambient temperature is smaller than or equal to a preset first threshold value, and the preset target temperature is higher than a preset second threshold value, controlling the constant temperature subsystem and the temperature reduction subsystem to work.
Illustratively, the preset first threshold value is 60, the preset second threshold value is-25, the preset target temperature TS is greater than the ambient temperature TA, and-25 straw TS is straw TA +60, and then the constant temperature subsystem and the cooling subsystem are both controlled to work. Specifically, the opening degree of the electronic expansion valve at the inlet of the evaporator in the constant-temperature subsystem can be controlled to be larger than zero, and the opening degree of the electronic expansion valve at the inlet of the evaporator in the cooling subsystem is controlled to be larger than zero.
And step 240, if the temperature regulation requirement is a temperature reduction requirement, controlling the constant temperature subsystem and the temperature reduction subsystem to work when the preset target temperature is smaller than a preset second threshold value.
And if the temperature regulation requirement is a temperature reduction requirement, controlling the constant temperature subsystem and the temperature reduction subsystem to work when the preset target temperature TS < -25. Fig. 5 is a schematic diagram of another cooling mode provided in the second embodiment of the present invention. Referring to fig. 5, the opening degree of the electronic expansion valve at the inlet of the evaporator in the temperature-reducing subsystem is increased and then decreased to zero, and the opening degree of the electronic expansion valve at the inlet of the evaporator in the constant-temperature subsystem is increased and then decreased and finally stabilized at a value greater than zero.
Illustratively, the preset first threshold value is 60, the preset second threshold value is-25, the preset target temperature TS is greater than the ambient temperature TA, and-25 straw TS is straw TA +60, the constant temperature subsystem is controlled to operate, and the cooling subsystem is controlled to stop operating. In addition, when TS > TA +60, the constant temperature subsystem is controlled to work, and the cooling subsystem is controlled to stop working.
And step 260, if the temperature regulation requirement is a constant temperature requirement, controlling the constant temperature subsystem to stop working and controlling the cooling subsystem to work when the preset target temperature is less than a preset second threshold value.
Illustratively, if the temperature regulation requirement is a constant temperature requirement, when the preset target temperature TS < -25, the constant temperature subsystem and the cooling subsystem are controlled to work. In this embodiment, the temperature is given in units of degrees celsius.
Fig. 6 is a schematic diagram of another cooling mode provided in the second embodiment of the present invention. Referring to fig. 6, the opening degree of the electronic expansion valve at the inlet of the evaporator in the constant temperature subsystem is increased and then decreased to zero, and the opening degree of the electronic expansion valve at the inlet of the evaporator in the cooling subsystem is increased and then decreased and finally stabilized at a value greater than zero.
For example, the initial opening degree of the electronic expansion valve may be as in table 1:
TABLE 1 initial opening degree of electronic expansion valve
| TA/TPE | TPE<-25 | -25≤TPE≤-3 | TPE>-3 |
| TA>30 | 240 | 240 | 240 |
| 20≤TA≤30 | 240 | 240 | 240 |
| TA<20 | 240 | 240 | 240 |
DEEVcabi _ refj _ k _ pulldown is a cooling period opening degree, and the rule is as follows:
in the above formula, DEEVcabi _ refj _ k _ PID _ min is the minimum opening limit value of the PID control section set during the temperature reduction period of the electronic expansion valve DEEVcabi _ refj _ k; DEEVcabi _ refj _ k _ PID _ max is a maximum opening limit value of a PID section set during the temperature reduction period of the electronic expansion valve DEEVcabi _ refj _ k; tpv _ cab _ err _ initial is the initial temperature deviation of the temperature control chamber cab; tpv _ cab _ err (k) is the temperature deviation of the temperature control chamber cab at the kth sampling moment; tpv _ cab _ err _ devcab _ refj _ k _ turn is the temperature deviation of the temperature-controlled compartment cab at the time when the temperature decreasing period shifts to the pre-equilibrium period (or from the pre-equilibrium period to the temperature decreasing period).
DEEVcabi _ refj _ k _ decade is the opening degree of the pre-equilibrium period, and the rule is as follows:
in the above equation, DEEVcabi _ refj _ k _ cons _ tem is the opening of the electronic expansion valve in the constant temperature state. Illustratively, the definition of DEEVcabi _ refj _ k _ cons _ tem is shown in Table 2.
Table 2DEEVcabi _refj _k _cons _tempdefinition example
According to the control method of the temperature regulating system, the constant temperature subsystem and/or the cooling subsystem are controlled to work according to the ambient temperature and the temperature regulating requirement, when the temperature regulating requirement is the constant temperature requirement, the constant temperature subsystem or the cooling subsystem is controlled to work, the problem of high energy consumption caused by the fact that the constant temperature subsystem and the cooling subsystem work can be solved, energy-saving operation is achieved, and the use cost of a user is reduced.
EXAMPLE III
Fig. 7 is a block diagram of a control device of a temperature control system according to a third embodiment of the present invention. The temperature adjusting system comprises a constant temperature subsystem and a cooling subsystem, and is used for adjusting the temperature of the environmental test chamber; the control device of the temperature system includes: an information acquisition module 310, a first control module 320, and a second control module 330; the information acquisition module 310 is configured to acquire ambient temperature and temperature regulation requirements of the environmental test chamber; the first control module 320 is used for controlling at least one of the constant temperature subsystem and the cooling subsystem to work according to the ambient temperature and the preset target temperature if the temperature regulation requirement is the cooling requirement; the second control module 330 is configured to control the constant temperature subsystem or the cooling subsystem to operate according to the ambient temperature and the preset target temperature if the temperature adjustment requirement is the constant temperature requirement.
Optionally, the first control module 320 includes: a first control unit and a second control unit; the first control unit is used for controlling the constant-temperature subsystem to work and controlling the cooling subsystem to stop working when the preset target temperature is higher than the ambient temperature and the difference value between the preset target temperature and the ambient temperature is higher than a preset first threshold value; the second control unit is used for controlling the constant temperature subsystem and the cooling subsystem to work when the preset target temperature is higher than the ambient temperature, the difference value between the preset target temperature and the ambient temperature is smaller than or equal to a preset first threshold value, and the preset target temperature is higher than a preset second threshold value.
Preferably, the second control unit is further configured to control both the constant temperature subsystem and the cooling subsystem to operate when the preset target temperature is less than a preset second threshold.
Preferably, the second control unit is specifically configured to control an opening degree of an electronic expansion valve at an inlet of an evaporator in the constant-temperature subsystem to be greater than zero, and an opening degree of the electronic expansion valve at an inlet of the evaporator in the cooling subsystem to be greater than zero.
Preferably, the first control unit is specifically configured to control an opening degree of an electronic expansion valve at an inlet of an evaporator in the constant-temperature subsystem to increase and then decrease, and control an opening degree of the electronic expansion valve at an inlet of the evaporator in the cooling subsystem to be zero.
Optionally, the second control module 330 includes: a third control unit and a fourth control unit; the third control unit is used for controlling the constant-temperature subsystem to work and controlling the cooling subsystem to stop working when the preset target temperature is higher than the ambient temperature, the difference value between the preset target temperature and the ambient temperature is smaller than or equal to a preset first threshold value, and the preset target temperature is higher than a preset second threshold value; and the fourth control unit is used for controlling the constant-temperature subsystem to stop working and controlling the cooling subsystem to work when the preset target temperature is less than the preset second threshold value.
The embodiment of the invention provides an environmental test chamber which comprises a control system and a temperature adjusting system as described in any embodiment of the invention, wherein the control system is electrically connected with the temperature adjusting system, and the control system comprises a control device as described in any embodiment of the invention. The controller can control the working state of the temperature adjusting system so as to adjust the temperature of the environmental test chamber.
Optionally, the control system includes a controller and a touch screen, and the controller is electrically connected to the touch screen. Specifically, the controller can transmit received information such as temperature information to the touch screen, the touch screen can receive an externally input control signal and transmit the control signal to the controller, and the controller can control the temperature adjusting system according to the control signal.
The control device and the environmental test chamber of the temperature adjusting system provided by the embodiment belong to the same inventive concept as the control method of the temperature adjusting system provided by any embodiment of the invention, and have corresponding beneficial effects, and detailed technical details in the embodiment are not shown in the control method of the temperature adjusting system provided by any embodiment of the invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. The control method of the temperature adjusting system is characterized in that the temperature adjusting system comprises a constant temperature subsystem and a cooling subsystem, the constant temperature subsystem and the cooling subsystem are both used for adjusting the temperature of an environmental test chamber, and the control method comprises the following steps:
acquiring the ambient temperature and the temperature regulation requirement of the environmental test chamber;
if the temperature regulation requirement is a temperature reduction requirement, controlling at least one of the constant temperature subsystem and the temperature reduction subsystem to work according to the ambient temperature and a preset target temperature;
and if the temperature regulation requirement is a constant temperature requirement, controlling the constant temperature subsystem or the cooling subsystem to work according to the ambient temperature and a preset target temperature.
2. The control method of claim 1, wherein said controlling at least one of said constant temperature subsystem and said cool down subsystem to operate based on said ambient temperature and a preset target temperature comprises:
when the preset target temperature is higher than the ambient temperature and the difference value between the preset target temperature and the ambient temperature is higher than a preset first threshold value, controlling the constant-temperature subsystem to work and controlling the cooling subsystem to stop working;
when the preset target temperature is higher than the ambient temperature, the difference value between the preset target temperature and the ambient temperature is smaller than or equal to a preset first threshold value, and the preset target temperature is higher than a preset second threshold value, the constant temperature subsystem and the cooling subsystem are controlled to work.
3. The control method according to claim 2, characterized by further comprising:
and when the preset target temperature is smaller than a preset second threshold value, controlling the constant temperature subsystem and the cooling subsystem to work.
4. The control method of claim 2, wherein said controlling both said constant temperature subsystem and said cooling subsystem to operate comprises:
and controlling the opening degree of an electronic expansion valve at the inlet of the evaporator in the constant temperature subsystem to be larger than zero, and controlling the opening degree of the electronic expansion valve at the inlet of the evaporator in the cooling subsystem to be larger than zero.
5. The control method of claim 2, wherein the controlling the constant temperature subsystem to operate and the cooling subsystem to stop operating comprises:
and controlling the opening degree of an electronic expansion valve at the inlet of the evaporator in the constant temperature subsystem to increase and then decrease, and controlling the opening degree of the electronic expansion valve at the inlet of the evaporator in the cooling subsystem to be zero.
6. The control method according to claim 1, wherein the controlling the operation of the constant temperature subsystem or the cooling subsystem according to the ambient temperature and a preset target temperature comprises:
when the preset target temperature is higher than the ambient temperature, the difference value between the preset target temperature and the ambient temperature is smaller than or equal to a preset first threshold value, and the preset target temperature is higher than a preset second threshold value, controlling the constant-temperature subsystem to work, and controlling the cooling subsystem to stop working;
and when the preset target temperature is smaller than a preset second threshold value, controlling the constant-temperature subsystem to stop working and controlling the cooling subsystem to work.
7. The control device of the temperature adjusting system is characterized in that the temperature adjusting system comprises a constant temperature subsystem and a cooling subsystem, and the constant temperature subsystem and the cooling subsystem are both used for adjusting the temperature of an environmental test chamber;
the control device includes:
the information acquisition module is used for acquiring the ambient temperature and the temperature regulation requirement of the environmental test chamber;
the first control module is used for controlling at least one of the constant temperature subsystem and the cooling subsystem to work according to the ambient temperature and a preset target temperature if the temperature regulation requirement is a cooling requirement;
and the second control module is used for controlling the constant-temperature subsystem or the cooling subsystem to work according to the ambient temperature and the preset target temperature if the temperature regulation requirement is a constant-temperature requirement.
8. The control apparatus of claim 7, wherein the first control module comprises:
the first control unit is used for controlling the constant-temperature subsystem to work and controlling the cooling subsystem to stop working when the preset target temperature is higher than the ambient temperature and the difference value between the preset target temperature and the ambient temperature is higher than a preset first threshold value;
and the second control unit is used for controlling the constant-temperature subsystem and the cooling subsystem to work when the preset target temperature is higher than the ambient temperature, the difference value between the preset target temperature and the ambient temperature is smaller than or equal to a preset first threshold value, and the preset target temperature is higher than a preset second threshold value.
9. An environmental test chamber, comprising a control system and a tempering system according to any of claims 1-8, the control system being electrically connected to the tempering system, the control system comprising a control device according to any of claims 7-8.
10. An environmental test chamber according to claim 9, wherein the control system comprises a controller and a touch screen, the controller being electrically connected to the touch screen, the control device according to any one of claims 7 to 8 being integrated in the controller.
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| CN118009594A (en) * | 2024-02-22 | 2024-05-10 | 江苏拓米洛高端装备股份有限公司 | Control method of refrigerating system and refrigerating system |
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