CN111952826A - High-energy laser thermal management system based on cold accumulation mode and control method thereof - Google Patents
High-energy laser thermal management system based on cold accumulation mode and control method thereof Download PDFInfo
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- CN111952826A CN111952826A CN202010918821.9A CN202010918821A CN111952826A CN 111952826 A CN111952826 A CN 111952826A CN 202010918821 A CN202010918821 A CN 202010918821A CN 111952826 A CN111952826 A CN 111952826A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
- H01S3/042—Arrangements for thermal management for solid state lasers
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
- H01S3/0407—Liquid cooling, e.g. by water
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Abstract
The invention discloses a high-energy laser heat management system based on a cold accumulation mode and a control method thereof, wherein the system comprises a low-temperature refrigeration loop system, an internal circulation cold-carrying loop system, an external circulation cooling loop system and a control system; the control system is respectively electrically connected with the low-temperature refrigeration loop system, the internal circulation cold-carrying loop system and the external circulation cooling loop system; the low-temperature refrigeration loop system exchanges heat with the internal circulation cold-carrying loop system through the plate heat exchanger to realize heat exchange and cold quantity transmission; the internal circulation cold-carrying loop system and the external circulation cooling loop share one open water tank, so that the low-temperature cold-carrying agent and the high-temperature cold-carrying agent absorbing waste heat are mixed, and the purpose of absorbing waste heat is achieved. The invention adopts a mode of absorbing laser waste heat after cold accumulation based on low-temperature secondary refrigerant, can greatly reduce the volume, weight and operation power consumption of the thermal management system, and is particularly suitable for high-energy laser systems arranged on vehicle-mounted or airborne mobile platforms which work for a short time and stand-by operation for a long time.
Description
Technical Field
The invention relates to the technical field of laser technology and thermal management, in particular to a high-energy laser thermal management system based on a cold accumulation mode and a control method thereof.
Background
In recent years, high-energy solid-state lasers have been gradually moved from laboratory devices to practical equipment applications with great progress made in power output, beam quality, and the like of solid-state lasers. However, when the power level of the laser is increased, the energy conversion efficiency of the laser is generally low, and the large thermal management system will limit the carrying application of the high-energy laser system on mobile platforms such as vehicles. Aiming at the working characteristics of short-time working and long-time standby running of a high-energy laser system, the heat management technical route of the cold accumulation mode is adopted to replace the traditional real-time emission mode, so that the size and the weight of the system can be effectively reduced, the energy consumption is reduced, the application range is expanded, and the method has important significance on the application and the development of the high-energy laser technology. The existing cold storage type thermal management systems are rarely reported, most of the existing prototype systems exchange heat in a heat exchange mode of arranging a coil and a heater in a water tank, the heat exchange efficiency is low, and the requirement on the time length for quick expansion of system equipment is not met; the mainstream electric three-way valve confluence temperature control mode, when the control system adjusts the opening of the three-way valve, the problem of large fluctuation of pressure and flow inevitably exists due to the nonlinear adjusting structural characteristics of the three-way valve, and the fluctuation of the flow must influence the internal heat exchange of a laser system, thereby influencing the overall performance of the system.
Disclosure of Invention
The invention aims to provide a high-energy laser heat management system based on a cold accumulation mode and a control method thereof to solve the problems, and the low-temperature refrigeration loop system exchanges heat with an internal circulation cold-carrying loop system through a plate heat exchanger to realize heat exchange and cold quantity transmission; the internal circulation cold-carrying loop system and the external circulation cooling loop share one open water tank, so that the low-temperature cold-carrying agent and the high-temperature cold-carrying agent absorbing waste heat are mixed, and the purpose of absorbing waste heat is achieved.
The invention realizes the purpose through the following technical scheme:
the high-energy laser thermal management system based on the cold accumulation mode comprises a low-temperature refrigeration loop system, an internal circulation cold-carrying loop system, an external circulation cooling loop system and a control system; the control system is respectively electrically connected with the low-temperature refrigeration loop system, the internal circulation cold-carrying loop system and the external circulation cooling loop system; the low-temperature refrigeration loop system exchanges heat with the internal circulation cold-carrying loop system through the plate heat exchanger; and an open water tank is shared between the internal circulation cold-carrying loop system and the external circulation cooling loop system.
Further, the external circulation cooling loop system comprises: the device comprises a first electric two-way valve, a closed buffer water tank, an external circulating pump, a filter, a first temperature sensor, a pressure transmitter, a high-energy laser thermal load, a second temperature sensor, a flowmeter and an open water tank which are sequentially connected.
The outer circulation cooling loop system further comprises a second electric two-way valve, an inlet of the second electric two-way valve is connected with an outlet of the flow meter and a first water return port of the open water tank, an outlet of the second electric two-way valve is connected with an outlet of the first electric two-way valve and an inlet of the closed buffer water tank, and a heater is installed in the closed buffer water tank.
The further scheme is that the external circulation cooling loop system further comprises a bypass adjusting valve, one end of the bypass adjusting valve is connected with an inlet of the flowmeter and an outlet of the high-energy laser heat load, and the other end of the bypass adjusting valve is connected with an outlet of the filter and an inlet of the first temperature sensor.
The further scheme is that the internal circulation cold-carrying loop system comprises an internal circulation pump, a plate heat exchanger, a flow switch and an open water tank which are sequentially connected; the first inlet of the plate heat exchanger is connected with the outlet of the internal circulating pump, and the first outlet of the plate heat exchanger is connected with the inlet of the flow switch;
the low-temperature refrigeration loop system comprises a low-temperature refrigeration system, a second inlet of the plate heat exchanger is connected with an outlet of the low-temperature refrigeration system, and a second outlet of the plate heat exchanger is connected with an inlet of the low-temperature refrigeration system.
The first water outlet of the open water tank is connected with the inlet of the first electric two-way valve of the outer circulation cooling loop system, and the first water return port of the open water tank is connected with the inlet of the second electric two-way valve of the outer circulation cooling loop system and the outlet of the flow meter; the second delivery port of open water tank links to each other with the internal circulation pump entry of cold return circuit system is carried to the inner loop, and the second return water mouth of open water tank and the flow switch exit linkage of cold return circuit system is carried to the inner loop, open water tank internally mounted has third temperature sensor.
The application also provides a control method of the high-energy laser thermal management system based on the cold storage mode, which comprises the following steps:
step (1), the control system sequentially starts an inner circulating pump and an outer circulating pump, and the inner circulating pump and the outer circulating pump are always kept in a running state after being started;
step (2), after the step (1) is completed, the control system judges whether the low-temperature refrigeration loop system needs to be started according to the cold accumulation temperature value measured by a third temperature sensor in the open water tank in real time: if the cold accumulation temperature is higher than the upper limit of the set temperature range, the low-temperature refrigeration loop system is started, and the low-temperature refrigeration loop system is closed until the cold accumulation temperature is lower than the lower limit of the set temperature range; if the cold accumulation temperature is lower than the upper limit of the set temperature range, the low-temperature refrigeration loop system is kept in a closed state;
step (3), after the step (1) is completed, the control system judges whether the heater in the closed buffer water tank needs to be started according to the temperature value of the cooling liquid measured by the first temperature sensor: if the cooling liquid is lower than the lower limit of the set temperature range, the heater is started until the temperature of the cooling liquid is higher than the upper limit of the set temperature range, and then the heater is closed; if the temperature of the cooling liquid is higher than the upper limit of the set temperature range, keeping the heater in a closed state;
and (4) adjusting the opening degrees of the first electric valve and the second electric valve in real time by the control system according to the temperature value of the cooling liquid measured by the first temperature sensor until the temperature value of the cooling liquid measured by the first temperature sensor is within a set range.
The control system adopts a PID control mode to adjust the opening degree of the first electric two-way valve and the second two-way valve in the external circulation cooling loop system.
The control system judges whether the high-energy laser thermal load is loaded in real time according to the temperature value of the cooling liquid measured by the second temperature sensor, so that the response speed of a PID control mode is increased more quickly.
The control system performs inverse control on the opening degrees of the first electric two-way valve and the second electric two-way valve in the external circulation cooling loop system within 0-100%, namely the sum of the opening degrees of the first electric two-way valve and the second electric two-way valve is kept at 100%.
The invention has the beneficial effects that:
the high-energy laser heat management system based on the cold accumulation mode has the outstanding advantages of small size, light weight and low energy consumption compared with the traditional real-time heat dissipation mode, and has important significance for promoting the carrying application of high-energy laser equipment on mobile platforms such as vehicles and the like. Through the designed internal circulation cold carrying loop system: on one hand, the heat exchange is carried out with the low-temperature refrigeration system through the plate heat exchanger, so that the system has higher system compactness and heat exchange efficiency, is beneficial to shortening the cold accumulation time and improving the response capability of the laser system for quick expansion; on the other hand, the water tank and the external circulation refrigeration loop system share one open water tank, so that waste heat generated in the working process of high-energy laser can be quickly absorbed. In addition, the PID adjusts the opening degree of two electric two-way valves with completely consistent models and specifications in real time, so that the stability of the flow of the cooling liquid after confluence and high-precision temperature control can be ensured; the mode that the closed buffer water tank is arranged at the front end of the water inlet of the external circulating pump can further improve the temperature control precision of the cooling liquid. The application aims at the high-energy lasers with different scales, the thermal management system of the high-energy lasers can achieve equal scaling according to the thermal load, and the high-energy lasers have good inheritance and expansibility.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the embodiments or the drawings needed to be practical in the prior art description, and obviously, the drawings in the following description are only some embodiments of the embodiments, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the structure of the present invention.
FIG. 2 is a control flow chart of the present invention.
Description of reference numerals: 1 low temperature refrigeration loop system, 2 inner loop year cold loop system, 3 outer circulation cooling loop system, 4 first electronic two-way valves, 5 closed buffer tank, 6 heaters, 7 outer circulating pump, 8 filters, 9 first temperature sensor, 10 pressure transmitter, 11 high energy laser heat loads, 12 second temperature sensor, 13 bypass governing valves, 14 flowmeters, 15 second electronic two-way valves, 16 open water tanks, 17 third temperature sensor, 18 inner circulating pump, 19 plate heat exchanger, 20 flow switch, 21 low temperature refrigeration system.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Example 1
As shown in fig. 1, the high-energy laser thermal management system based on the cold accumulation mode of the present embodiment includes a low-temperature refrigeration loop system 1, an internal circulation cold-carrying loop system 2, an external circulation cooling loop system 3 and a control system; the control system is respectively electrically connected with the low-temperature refrigeration loop system, the internal circulation cold-carrying loop system and the external circulation cooling loop system; specifically, the low-temperature refrigeration loop system 1 exchanges heat with the internal circulation cold-carrying loop system 2 through the plate heat exchanger 19, and the internal circulation cold-carrying loop system 2 and the external circulation cooling loop system 3 share the same open water tank 16.
Specifically, the external circulation cooling circuit system includes: the device comprises a first electric two-way valve 4, a closed buffer water tank 5, an external circulating pump 7, a filter 8, a first temperature sensor 9, a pressure transmitter 10, a high-energy laser heat load 11, a second temperature sensor 12, a flowmeter 14 and an open water tank 16 which are connected in sequence. The external circulation cooling loop system also comprises a second electric two-way valve 15, wherein the inlet of the second electric two-way valve is connected with the outlet of the flowmeter and the first water return port of the open water tank, and the outlet of the second electric two-way valve is connected with the outlet of the first electric valve and the inlet of the closed buffer water tank. A heater 6 is arranged in the closed buffer water tank; the first electric two-way valve and the second two-way valve adopted in the external circulation cooling loop system are electric two-way valves with the same type and specification.
The external circulation cooling loop system also comprises a bypass adjusting valve 13, one end of the bypass adjusting valve 13 is connected with the inlet of the flowmeter 14 and the outlet of the high-energy laser heat load 11, and the other end of the bypass adjusting valve 13 is connected with the outlet of the filter 8 and the inlet of the first temperature sensor 9.
The internal circulation cold-carrying loop system comprises an internal circulation pump 18, a plate heat exchanger 19, a flow switch 20 and an open water tank 16 which are connected in sequence. A first inlet of the plate type heat exchanger 19 is connected with an outlet of the internal circulating pump 18, and a first outlet of the plate type heat exchanger 19 is connected with an inlet of the flow switch 20; the low-temperature refrigeration loop system 1 comprises a low-temperature refrigeration system 21, a second inlet of the plate type heat exchanger 19 is connected with the outlet 1 of the low-temperature refrigeration system, and a second outlet of the plate type heat exchanger 19 is connected with the inlet of the low-temperature refrigeration system 1.
In this embodiment, the first water outlet of the open water tank 16 is connected to the inlet of the first electric two-way valve 4 of the external circulation cooling loop system 3, and the first water return port of the open water tank 16 is connected to the inlet of the second electric two-way valve 15 of the external circulation cooling loop system 3 and the outlet of the flow meter 14; a second water outlet of the open water tank 16 is connected with an inlet of an internal circulation pump 18 of the internal circulation cold-carrying loop system 2, a second water outlet of the open water tank 16 is connected with an outlet of a flow switch 20 of the internal circulation cold-carrying loop system 2, and a third temperature sensor 17 is arranged inside the open water tank 16.
Example 2
As shown in fig. 2, the present embodiment discloses a control method of a high-energy laser thermal management system based on a cold storage mode, specifically, the control method includes the following steps:
step (1), the control system sequentially starts an inner circulating pump and an outer circulating pump, and the inner circulating pump and the outer circulating pump are always kept in a running state after being started;
step (2), after the step (1) is completed, the control system judges whether the low-temperature refrigeration loop system needs to be started according to the cold accumulation temperature value measured by a third temperature sensor in the open water tank in real time: if the cold accumulation temperature is higher than the upper limit of the set temperature range, the low-temperature refrigeration loop system is started, and the low-temperature refrigeration loop system is closed until the cold accumulation temperature is lower than the lower limit of the set temperature range; if the cold accumulation temperature is lower than the upper limit of the set temperature range, the low-temperature refrigeration loop system is kept in a closed state;
step (3), after the step (1) is completed, the control system keeps a heater in the closed buffer water tank in a closed state according to whether the temperature value of the cooling liquid measured by the first temperature sensor is in a normal working temperature range or not, and keeps the temperature in the normal working range by adjusting the opening degrees of the first electric valve and the second electric valve in real time through PID (proportion integration differentiation);
and (4) after the step (3) is finished, the control system further judges whether the temperature of the cooling liquid is lower than the lower limit of the normal working range according to the fact that the temperature value of the cooling liquid measured by the first temperature sensor is not in the normal working range. If so, starting a heater in the closed buffer water tank until the temperature of the cooling liquid is within a normal working temperature range;
and (5) after the step (3) is finished, the control system further judges whether the temperature of the cooling liquid is higher than the upper limit of the normal working range according to the fact that the temperature value of the cooling liquid measured by the first temperature sensor is not in the normal working range. If so, keeping the heater in the closed buffer water tank in a closed state, and adjusting the opening degrees of the first electric valve and the second electric valve in real time through PID (proportion integration differentiation) to keep the temperature control in a normal working range.
Whether the high-energy laser thermal load is loaded or not is judged in real time by the control system according to the temperature value of the cooling liquid measured by the second temperature sensor in the embodiment, and the response speed of a PID control mode can be increased more quickly, so that temperature fluctuation in the initial loading process of the high-energy laser thermal load is avoided, and the stability of the cooling liquid temperature of the high-energy laser thermal management system in the no-load and thermal load loading process and long-time full-load continuous loading is ensured.
The opening sizes of the first electric two-way valve and the second electric two-way valve in the external circulation cooling loop system are controlled in a reverse mode between 0% and 100%, namely the opening sizes of the first electric two-way valve and the second electric two-way valve are kept to be 100% all the time, and the mode can effectively guarantee the stability of the flow of the cooling liquid output by the external circulation pump when the opening sizes of the electric two-way electric valves are adjusted in the temperature control process of the PID.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims. It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition. In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (10)
1. The high-energy laser thermal management system based on the cold accumulation mode is characterized by comprising a low-temperature refrigeration loop system, an internal circulation cold-carrying loop system, an external circulation cooling loop system and a control system; the control system is respectively electrically connected with the low-temperature refrigeration loop system, the internal circulation cold-carrying loop system and the external circulation cooling loop system; the low-temperature refrigeration loop system exchanges heat with the internal circulation cold-carrying loop system through the plate heat exchanger; an open water tank is shared between the internal circulation cold-carrying loop system and the external circulation cooling loop system.
2. The cold storage mode-based high energy laser thermal management system of claim 1, wherein said external circulation cooling loop system comprises: the device comprises a first electric two-way valve, a closed buffer water tank, an external circulating pump, a filter, a first temperature sensor, a pressure transmitter, a high-energy laser thermal load, a second temperature sensor, a flowmeter and an open water tank which are sequentially connected.
3. The cold-storage-mode-based high-energy laser thermal management system as claimed in claim 2, wherein the external circulation cooling loop system further comprises a second electric two-way valve, an inlet of the second electric two-way valve is connected with an outlet of the flow meter and a first water return port of the open water tank, an outlet of the second electric two-way valve is connected with an outlet of the first electric two-way valve and an inlet of the closed buffer water tank, and a heater is installed in the closed buffer water tank.
4. The cold storage mode-based high energy laser thermal management system of claim 2, wherein said external circulation cooling loop system further comprises a bypass regulating valve, one end of said bypass regulating valve is connected to an inlet of a flow meter and an outlet of the high energy laser thermal load, and the other end of said bypass regulating valve is connected to an outlet of a filter and an inlet of the first temperature sensor.
5. The cold storage mode-based high energy laser thermal management system according to claim 1, wherein the internal circulation cold-carrying loop system comprises an internal circulation pump, a plate heat exchanger, a flow switch and an open water tank which are connected in sequence; the first inlet of the plate heat exchanger is connected with the outlet of the internal circulating pump, and the first outlet of the plate heat exchanger is connected with the inlet of the flow switch;
the low-temperature refrigeration loop system comprises a low-temperature refrigeration system, a second inlet of the plate heat exchanger is connected with an outlet of the low-temperature refrigeration system, and a second outlet of the plate heat exchanger is connected with an inlet of the low-temperature refrigeration system.
6. The cold storage mode-based high energy laser thermal management system according to any one of claims 1 to 5, wherein the first water outlet of the open water tank is connected to an inlet of a first electrically operated two-way valve of the external circulation cooling loop system, and the first water return port of the open water tank is connected to an inlet of a second electrically operated two-way valve of the external circulation cooling loop system and an outlet of the flow meter; the second delivery port of open water tank links to each other with the internal circulation pump entry of cold return circuit system is carried to the inner loop, and the second return water mouth of open water tank and the flow switch exit linkage of cold return circuit system is carried to the inner loop, open water tank internally mounted has third temperature sensor.
7. The method for controlling a high-energy laser thermal management system based on a cold storage mode as claimed in any one of claims 1 to 6, comprising the steps of:
step (1), the control system sequentially starts an inner circulating pump and an outer circulating pump, and the inner circulating pump and the outer circulating pump are always kept in a running state after being started;
step (2), after the step (1) is completed, the control system judges whether the low-temperature refrigeration loop system needs to be started according to the cold accumulation temperature value measured by a third temperature sensor in the open water tank in real time: if the cold accumulation temperature is higher than the upper limit of the set temperature range, the low-temperature refrigeration loop system is started, and the low-temperature refrigeration loop system is closed until the cold accumulation temperature is lower than the lower limit of the set temperature range; if the cold accumulation temperature is lower than the upper limit of the set temperature range, the low-temperature refrigeration loop system is kept in a closed state;
step (3), after the step (1) is completed, the control system judges whether the heater in the closed buffer water tank needs to be started according to the temperature value of the cooling liquid measured by the first temperature sensor: if the cooling liquid is lower than the lower limit of the set temperature range, the heater is started until the temperature of the cooling liquid is higher than the upper limit of the set temperature range, and then the heater is closed; if the temperature of the cooling liquid is higher than the upper limit of the set temperature range, keeping the heater in a closed state;
and (4) adjusting the opening degrees of the first electric valve and the second electric valve in real time by the control system according to the temperature value of the cooling liquid measured by the first temperature sensor until the temperature value of the cooling liquid measured by the first temperature sensor is within a set range.
8. The method as claimed in claim 7, wherein the control system adopts a PID control method to adjust the opening of the first and second two-way valves in the external circulation cooling loop system.
9. The method as claimed in claim 7, wherein the control system determines whether the high-energy laser thermal load is loaded in real time according to the temperature value of the cooling liquid measured by the second temperature sensor, so as to increase the response speed of the PID control mode more rapidly.
10. The method for controlling the high-energy laser thermal management system based on the cold accumulation mode as claimed in claim 7, wherein the opening degree of the first electric two-way valve and the second electric two-way valve in the external circulation cooling loop system is controlled in a reverse manner between 0% and 100%, that is, the sum of the opening degrees of the first electric two-way valve and the second electric two-way valve is kept at 100%.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112817347A (en) * | 2020-12-25 | 2021-05-18 | 北京京仪自动化装备技术有限公司 | Rapid temperature rise and drop system and control method thereof |
| CN115663572A (en) * | 2022-12-29 | 2023-01-31 | 广州特域机电有限公司 | Energy-saving control method and system for double-temperature water chiller and storage medium |
| CN116817477A (en) * | 2023-08-31 | 2023-09-29 | 苏州黑盾环境股份有限公司 | Liquid cooling air conditioner refrigerating system and control method thereof |
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2020
- 2020-09-03 CN CN202010918821.9A patent/CN111952826A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112817347A (en) * | 2020-12-25 | 2021-05-18 | 北京京仪自动化装备技术有限公司 | Rapid temperature rise and drop system and control method thereof |
| CN115663572A (en) * | 2022-12-29 | 2023-01-31 | 广州特域机电有限公司 | Energy-saving control method and system for double-temperature water chiller and storage medium |
| CN116817477A (en) * | 2023-08-31 | 2023-09-29 | 苏州黑盾环境股份有限公司 | Liquid cooling air conditioner refrigerating system and control method thereof |
| CN116817477B (en) * | 2023-08-31 | 2024-03-19 | 苏州黑盾环境股份有限公司 | Liquid cooling air conditioner refrigerating system and control method thereof |
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