A precision temperature-controlled cooling system and method

Abstract

The present invention discloses a precise temperature control cooling system and method. The system includes: a bottom plate and a plurality of cooling units; the plurality of cooling units are arranged on the bottom plate or embedded in a cold plate; a pipeline is arranged in the cooling unit; the pipeline is provided with an inlet and an outlet for a cooling medium to flow into or out of the pipeline; the bottom plate is used for installing heat generating components. The method includes: arranging a plurality of cooling units on the same bottom plate; cooling the same bottom plate through the plurality of cooling units. The laser precise temperature control cooling system and method of the present invention omit the heat pipes in the prior art, and the temperature control is more precise and faster; the bottom plate is cooled by a plurality of cooling units, and the temperature control is more precise.

Description

Technical Field

[0001] The present invention relates to the technical field of heat dissipation, and particularly relates to a precision temperature control cooling system and method. Background Art

[0002] The types of lasers are increasing day by day and developing extremely rapidly, and the power used is also getting higher and higher. High-power lasers have been applied to many fields of people's social life, not only in civilian fields such as marking, scribing, and engraving, but also playing an increasingly important role in military fields such as laser guidance, ranging, and optoelectronic countermeasures. At present, the main problem faced by high-power lasers is that the stable working time of the lasers is relatively short, which greatly limits their practical applications. The stable working time of the lasers is mainly related to the heat dissipation of the lasers.

[0003] The existing heat dissipation of lasers cannot meet the requirements of the current laser system for the heat dissipation speed, and there are certain defects in both the heat dissipation effect and reliability. Summary of the Invention

[0004] In view of the above problems existing in the prior art, the present invention provides a precision temperature control cooling system and method. The heat-generating components are directly installed on the bottom plate, omitting the heat pipes in the prior art, and the temperature control is more accurate and faster; the bottom plate is cooled by multiple cooling units, and the temperature control is more accurate.

[0005] To solve the above technical problems, the present invention is implemented by the following technical solutions:

[0006] The present invention provides a precision temperature control cooling system, which includes: a bottom plate and multiple cooling units;

[0007] Wherein,

[0008] The multiple cooling units are arranged on the bottom plate or embedded in the bottom plate;

[0009] A pipeline is arranged in the cooling unit;

[0010] The pipeline is provided with an inlet and an outlet for allowing a cooling medium to flow into or out of the pipeline;

[0011] The bottom plate is used for installing heat-generating components.

[0012] Preferably, the cooling units are arranged in a matrix, and the cooling units in the same row or the same column share the same inlet and / or the same outlet.

[0013] Preferably, each cooling unit adopts one inlet and / or one outlet. In the prior art, on one base plate, the same cooling unit, one inlet and one outlet are adopted. The inlet temperature is low, the outlet temperature is high, and the temperature difference is large, so the control is not accurate. In the present invention, multiple cooling units are installed on one base plate. The cooling units in the same row or the same column adopt the same outlet and / or the same inlet, or each cooling unit adopts one inlet and / or one outlet. The temperature difference between the inlet and the outlet is small, and the temperature control is more accurate.

[0014] Preferably, the inlet and / or the outlet are controlled by a control valve for controlling whether it works. It is possible to control whether one or more cooling units work according to needs. When the required cooling temperature is relatively high, or the heating power of the heating components is not so large, a part of the cooling units can be controlled not to work to save energy consumption.

[0015] Preferably, the cooling unit is embedded in a copper plate, and the copper plate is arranged on the base plate or embedded in the base plate. The copper plate has fast heat conduction, more uniform refrigeration temperature, and reduces costs.

[0016] Preferably, it further includes:

[0017] a liquid storage tank, a thermostatic expansion valve or an electronic expansion valve, a variable frequency compressor, and a feedback unit; wherein,

[0018] the outlet of the liquid storage tank is connected to the inlet of the pipeline through the thermostatic expansion valve or the electronic expansion valve;

[0019] the outlet of the pipeline is connected to the suction port of the variable frequency compressor;

[0020] the feedback unit is used to feedback the temperature to the control system so that the control system controls the thermostatic expansion valve or the electronic expansion valve according to the temperature.

[0021] Preferably, the feedback unit feedbacks the temperature in two ways, namely, the temperature and the current of the heating components.

[0022] Preferably, it further includes: a bypass solenoid valve and a capillary tube; wherein,

[0023] the exhaust port of the variable frequency compressor is sequentially connected to the suction port of the variable frequency compressor through the bypass solenoid valve and the capillary tube.

[0024] Preferably, it further includes: a microchannel heat exchanger; wherein,

[0025] the exhaust port of the variable frequency compressor is connected to the inlet of the microchannel heat exchanger;

[0026] the outlet of the microchannel heat exchanger is connected to the inlet of the liquid storage tank;

[0027] The microchannel heat exchanger is used to cool down the cooling medium.

[0028] The present invention also provides a precise temperature control cooling method, which includes: arranging a plurality of cooling units on the same bottom plate;

[0029] The same bottom plate is cooled by the plurality of cooling units.

[0030] Preferably, the temperature is fed back in two ways, namely, the temperature and the current of the heating component, so that the feedback is more accurate and the control is more precise.

[0031] Preferably, it further includes:

[0032] S101: Calculate the target load increase ratio or decrease ratio according to the deviation between the feedback temperature and the target temperature and the feedback temperature change rate during operation, and cycle once every period;

[0033] S102: Add the target load increase ratio or decrease ratio to the current target load to obtain a new current target load;

[0034] S103: Calculate the current actual load of the unit according to the actual speed of the unit;

[0035] S104: If the new current target load obtained in S102 is greater than the first preset percentage of the current actual load, the unit switches to the loading control logic;

[0036] S105: If the current target load is less than the second preset percentage of the current actual load, the unit switches to the unloading control logic;

[0037] S106: If the current target load is between the first preset percentage and the second preset percentage of the current actual load, the unit is in a holding state; wherein,

[0038] The loading control logic includes:

[0039] S1041: If the target load of the unit is less than the first preset loading percentage, the compressor is in a holding state;

[0040] S1042: If the target load of the unit is greater than the first preset loading percentage and less than the second preset loading percentage, the compressor starts at the minimum speed and the bypass solenoid valve is opened;

[0041] S1043: If the target load of the unit is greater than the second preset loading percentage and less than the third preset loading percentage, the compressor operates at the minimum speed and the bypass solenoid valve is closed;

[0042] S1044: If the target load of the unit is greater than the third preset loading percentage and less than the fourth preset loading percentage, calculate the increased rotational speed required for the compressor according to the target load increase ratio;

[0043] S1045: If the target load of the unit is greater than the fourth preset loading percentage, the compressor operates at the maximum rotational speed until there is a unloading requirement.

[0044] The unloading control logic includes:

[0045] S1051: If the target load of the unit is greater than the first preset unloading percentage and less than the second preset unloading percentage, calculate the reduced rotational speed required according to the target load reduction ratio;

[0046] S1052: If the target load of the unit is greater than the third preset unloading percentage and less than the first preset unloading percentage, the compressor operates at the minimum rotational speed and closes the bypass solenoid valve;

[0047] S1053: If the target load of the unit is greater than the fourth preset unloading percentage and less than the third preset unloading percentage, the compressor operates at the minimum rotational speed and closes the bypass solenoid valve;

[0048] S1054: If the target load of the unit is less than or equal to the fifth preset unloading percentage, the compressor stops operating until there is a new loading requirement.

[0049] Compared with the prior art, the present invention has the following advantages:

[0050] (1) For the precision temperature control cooling system and method provided by the present invention, the heating components can be directly installed on the bottom plate, omitting the heat pipes in the prior art, and the temperature control is more accurate and faster;

[0051] (2) For the precision temperature control cooling system and method provided by the present invention, the bottom plate is cooled by multiple cooling units, and the temperature difference between the inlet and the outlet is small, and the temperature control is more accurate;

[0052] (3) For the precision temperature control cooling system and method provided by the present invention, the temperature is fed back in two ways, namely the temperature and the current of the heating components, and the feedback is more accurate and the control is more precise.

[0053] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The following further describes the embodiments of the present invention with reference to the drawings:

[0055] Figure 1 It is a schematic structural diagram of the precision temperature control cooling system according to an embodiment of the present invention;

[0056] Figure 2 A cross-sectional view of the precision temperature-controlled cooling system according to an embodiment of the present invention;

[0057] Figure 3 A schematic structural diagram of the precision temperature-controlled cooling system according to a preferred embodiment of the present invention;

[0058] Reference numeral description: 1 - bottom plate, 2 - cooling unit, 3 - pipeline, 4 - liquid storage tank, 5 - thermostatic expansion valve, 6 - variable frequency compressor, 7 - feedback unit, 8 - bypass solenoid valve, 9 - capillary tube, 10 - microchannel heat exchanger, 11 - speed control fan, 12 - filter;

[0059] 61 - liquid storage barrel. Specific embodiments

[0060] The following details the embodiments of the present invention. The embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation manners and specific operation processes are given. However, the protection scope of the present invention is not limited to the following embodiments.

[0061] As Figure 1 shown is a schematic structural diagram of the precision temperature-controlled cooling system according to an embodiment of the present invention. As Figure 2 shown is its cross-sectional view.

[0062] Please refer to Figure 1 , the precision temperature-controlled cooling system of this embodiment includes: a bottom plate 1 and a plurality of cooling units 2. Among them, the plurality of cooling units 2 are embedded in the bottom plate 1 (in different embodiments, they can also be arranged on the bottom plate 1); a pipeline 3 is provided in the cooling unit 2; the pipeline 3 is provided with an inlet and an outlet for allowing a cooling medium to flow into or out of the pipeline 3; the bottom plate 1 is used for installing heat-generating components.

[0063] In this embodiment, taking three cooling units 2 as an example, each cooling unit has one inlet and one outlet. In different embodiments, the number of cooling units is not necessarily three, and they are not necessarily arranged horizontally in the same row. They can be set according to needs.

[0064] In a preferred embodiment, the cooling units can also be arranged in a matrix (including multiple rows and multiple columns). The cooling units in the same row or the same column share the same inlet and / or the same outlet; or each cooling unit has one inlet and / or one outlet.

[0065] In the prior art, on a bottom plate, the same cooling unit is adopted, with one inlet and one outlet. The temperature of the inlet is low, and the temperature of the outlet is high, with a large temperature difference, and the control is not precise. In the present invention, multiple cooling units are installed on a bottom plate. The cooling units in the same row or the same column adopt the same outlet and / or the same outlet, or each cooling unit adopts one inlet and / or outlet. The temperature difference between the inlet and the outlet is small, and the temperature control is more precise.

[0066] In a preferred embodiment, the cooling unit 2 is embedded in a copper plate, and the copper plate is arranged on the bottom plate 1 or embedded in the bottom plate 1. The copper plate has fast heat conduction, and the refrigeration temperature is more uniform, reducing the cost.

[0067] In a preferred embodiment, the cooling system further includes: a liquid storage tank 4, a thermostatic expansion valve 5, a variable frequency compressor 6, and a feedback unit 7. The structural schematic diagram is as Figure 3 shown. Among them, the outlet of the liquid storage tank 4 is connected to the inlet of the pipeline 3 through the thermostatic expansion valve 5; the outlet of the pipeline 3 is connected to the liquid storage barrel 61 of the variable frequency compressor 6; the feedback unit 7 is used to feedback the temperature to the control system so that the control system controls the thermostatic expansion valve 5 according to the temperature. In this embodiment, the thermostatic expansion valve is taken as an example. In different embodiments, it can also be an electronic expansion valve.

[0068] In this embodiment, the cooling system further includes: a bypass solenoid valve 8 and a capillary tube 9. Among them, the exhaust port of the variable frequency compressor 6 is sequentially connected to the suction port of the variable frequency compressor 6 through the bypass solenoid valve 8 and the capillary tube 9.

[0069] In this embodiment, it further includes: a microchannel heat exchanger 10. Among them, the exhaust port of the variable frequency compressor 6 is connected to the inlet of the microchannel heat exchanger 10; the outlet of the microchannel heat exchanger 10 is connected to the inlet of the liquid storage tank 4; the microchannel heat exchanger 10 is used to cool the cooling medium. The microchannel heat exchanger 10 is cooled by a speed control fan 11.

[0070] In this embodiment, it further includes: a filter 12, which is arranged between the liquid storage tank 4 and the thermostatic expansion valve 5 and is used to filter the cooling medium.

[0071] In a preferred embodiment, the feedback unit feeds back the temperature in two ways: temperature and the current of the heating component. By feeding back the temperature in two ways, the feedback temperature is more accurate, and thus the temperature control is more precise.

[0072] In one embodiment, a precise cooling control method is further provided, which includes: arranging multiple cooling units on the same bottom plate; cooling the same bottom plate through multiple cooling units, with a small temperature difference between the inlet and the outlet, and more precise temperature control.

[0073] In a preferred embodiment, the temperature is fed back in two ways, i.e., through the temperature and the current of the heating component, so as to control the cooling unit, with more accurate feedback and more precise control.

[0074] The preferred embodiment further includes:

[0075] S101: During operation, calculate the target load increase ratio or decrease ratio according to the deviation between the feedback temperature and the target temperature and the feedback temperature change rate, and cycle once per period;

[0076] S102: Add the target load increase ratio or decrease ratio to the current target load to obtain the new current target load;

[0077] S103: Calculate the current actual load of the unit according to the actual speed of the unit;

[0078] S104: If the new current target load obtained in S102 is greater than the first preset percentage of the current actual load, the unit switches to the loading control logic;

[0079] S105: If the current target load is less than the second preset percentage of the current actual load, the unit switches to the unloading control logic;

[0080] S106: If the current target load is between the first preset percentage and the second preset percentage of the current actual load, the unit is in a holding state; where

[0081] The loading control logic includes:

[0082] S1041: If the target load of the unit is less than 20%, the compressor is in a holding state;

[0083] S1042: If the target load of the unit is greater than 20% and less than 40%, the compressor starts at the minimum speed and the bypass solenoid valve is opened;

[0084] S1043: If the target load of the unit is greater than 40% and less than 50%, the compressor runs at the minimum speed and the bypass solenoid valve is closed;

[0085] S1044: If the target load of the unit is greater than 50% and less than 120%, calculate the increased speed required for the compressor according to the target load increase ratio;

[0086] S1045: If the target load of the unit is greater than 120%, the compressor runs at the maximum speed until there is an unloading requirement.

[0087] The unloading control logic includes:

[0088] S1051: If the target load of the unit is greater than 45% and less than 120%, calculate the rotational speed that needs to be reduced according to the load reduction ratio of the target load.

[0089] S1052: If the target load of the unit is greater than 30% and less than 45%, the compressor operates at the minimum rotational speed and the bypass solenoid valve is closed.

[0090] S1053: If the target load of the unit is greater than 10% and less than 30%, the compressor operates at the minimum rotational speed and the bypass solenoid valve is closed.

[0091] S1054: If the target load of the unit is less than or equal to 0%, the compressor stops operating until there is a new loading demand.

[0092] It should be noted that the critical point percentages (such as: 20%, 40%, 50%, 120%, 45%, 30%, 10%, 0%) in the above-mentioned loading control logic and unloading control logic of the embodiments are not necessarily the critical point percentages exemplified above, and can also be changed according to actual needs.

[0093] What is disclosed herein is only the preferred embodiments of the present invention. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, and is not a limitation of the present invention. Any modifications and changes made by those skilled in the art within the scope of the specification shall fall within the scope protected by the present invention.

Claims

1. A precise temperature control and cooling method, characterized in that, This method is applied to a cooling system, which includes: a bottom plate and multiple cooling units; wherein, the multiple cooling units are arranged on the bottom plate or embedded in the bottom plate; pipelines are arranged in the cooling units; the bottom plate is used to install heat-generating components; the cooling units are arranged in a matrix; it further includes: a liquid storage tank, a thermostatic expansion valve or an electronic expansion valve, a variable-frequency compressor, a bypass solenoid valve, and a feedback unit; wherein, the outlet of the liquid storage tank is connected to the inlet of the pipeline through the thermostatic expansion valve or the electronic expansion valve; the outlet of the pipeline is connected to the suction port of the variable-frequency compressor; the discharge port of the variable-frequency compressor is sequentially connected to the suction port of the variable-frequency compressor through the bypass solenoid valve and a capillary tube; the feedback unit is used to feedback the temperature of the bottom plate to the control system so that the control system controls the thermostatic expansion valve or the electronic expansion valve according to the temperature; the bottom plate is cooled by the multiple cooling units; the cooling method further includes the following steps: S101: Calculate the target load increase ratio or decrease ratio according to the deviation between the feedback temperature and the target temperature and the feedback temperature change rate during operation, and cycle once every period; S102: Add the target load increase ratio or decrease ratio to the current target load to obtain a new current target load; S103: Calculate the current actual load of the unit according to the actual speed of the unit; S104: If the new current target load obtained in S102 is greater than the first preset percentage of the current actual load, the unit switches to the loading control logic; S105: If the current target load is less than the second preset percentage of the current actual load, the unit switches to the unloading control logic; S106: If the current target load is between the first preset percentage and the second preset percentage of the current actual load, the unit is in a holding state; wherein, the loading control logic includes: S1041: If the target load of the unit is less than the first loading preset percentage, the compressor is in a holding state; S1042: If the target load of the unit is greater than the first loading preset percentage and less than the second loading preset percentage, the compressor starts at the minimum speed and the bypass solenoid valve is opened; S1043: If the target load of the unit is greater than the second loading preset percentage and less than the third loading preset percentage, the compressor runs at the minimum speed and the bypass solenoid valve is closed; S1044: If the target load of the unit is greater than the third loading preset percentage and less than the fourth loading preset percentage, calculate the speed that the compressor needs to increase according to the target load increase ratio; S1045: If the target load of the unit is greater than the fourth loading preset percentage, the compressor runs at the highest speed until there is an unloading requirement; the unloading control logic includes: S1051: If the target load of the unit is greater than the first unloading preset percentage and less than the second unloading preset percentage, calculate the speed that needs to be reduced according to the target load decrease ratio;S1052: If the target load of the unit is greater than the third unloading preset percentage and less than the first unloading preset percentage, the compressor operates at the minimum speed and the bypass solenoid valve is closed; S1053: If the target load of the unit is greater than the fourth unloading preset percentage and less than the third unloading preset percentage, the compressor operates at the minimum speed and the bypass solenoid valve is closed; S1054: If the target load of the unit is less than or equal to the fifth unloading preset percentage, the compressor stops running until there is a new loading demand.

2. The precise temperature control cooling method according to claim 1, wherein The feedback unit feeds back the temperature in two ways, namely, the temperature of the bottom plate and the current of the heating component.

3. The precision temperature control cooling method according to claim 1, wherein The cooling units in the same row or the same column share the same inlet and / or the same outlet; alternatively, each cooling unit has an inlet and / or an outlet; the inlet and / or the outlet is controlled by a control valve to control whether it works.

4. The precise temperature control cooling method according to claim 1, characterized in that, The cooling unit is embedded in a copper plate, and the copper plate is disposed on or embedded in the bottom plate.

5. The precision temperature-controlled cooling method according to claim 1, characterized in that, It further includes: A microchannel heat exchanger; wherein, the exhaust port of the variable-frequency compressor is connected to the inlet of the microchannel heat exchanger; the outlet of the microchannel heat exchanger is connected to the inlet of the liquid storage tank; the microchannel heat exchanger is used to cool the cooling medium.

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