Adsorption refrigeration systems and their control methods, server liquid cooling systems and storage media

Abstract

This invention discloses an adsorption refrigeration system and its control method, a server liquid cooling system, and a storage medium. The adsorption refrigeration system includes an adsorption bed and a condenser. The condenser's condensation chamber receives the gaseous adsorbent discharged from the adsorption chamber of the adsorption bed. The adsorption bed has a heat exchange channel for heat exchange with the adsorbent in the adsorption chamber. One end of the heat exchange channel is connected to a cooling fluid inlet for introducing cooling fluid, and the other end is connected to a cooling fluid outlet for discharging cooling fluid. The condenser has a cooling channel capable of heat exchange with the gaseous adsorbent in the condensation chamber. One end of the cooling channel is connected to the cooling fluid outlet. The cooling fluid first passes through the adsorption bed, which facilitates a shorter adsorption time. Then, it passes through the condenser's cooling channel, which facilitates a longer desorption time in the adsorption bed. This correction ensures the adsorption refrigeration effect of the adsorption refrigeration system and effectively solves the problem of poor adsorption performance in adsorption refrigeration systems.

Description

Technical Field

[0001] This invention relates to the field of liquid cooling technology, and more specifically, to an adsorption refrigeration system and its control method, a server liquid cooling system, and a storage medium. Background Technology

[0002] Adsorption refrigeration systems are currently a relatively mature system. A typical adsorption refrigeration system includes an adsorption bed, a condenser, and an evaporator. The adsorption bed requires both heating and cooling fluids, while the condenser requires a cooling fluid. The evaporator can be directly installed on the structure requiring heat dissipation or connected via a chilled fluid. The adsorption bed must have at least one heat exchange channel for the exchange of heating and cooling fluids. In practical applications, the cooling fluids supplied to the condenser and the adsorption bed are generally separate.

[0003] In the process of realizing this invention, the inventors discovered that the prior art has at least the following problems: the distribution between the cooling fluid supplied to the condenser and the cooling fluid supplied to the adsorption bed is not good, resulting in low overall efficiency, which in turn leads to poor adsorption effect of the adsorption refrigeration system. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide an adsorption refrigeration system and its control method, a server liquid cooling system and a storage medium, which can effectively solve the problem of poor adsorption effect of the adsorption refrigeration system.

[0005] To achieve the first objective mentioned above, the present invention provides the following technical solution:

[0006] An adsorption refrigeration system includes an adsorption bed and a condenser. The condenser has a condensation chamber for receiving gaseous adsorbent discharged from the adsorption chamber of the adsorption bed. The adsorption bed has a heat exchange channel for exchanging heat with the adsorbent in the adsorption chamber. One end of the heat exchange channel is connected to a cooling fluid inlet for introducing cooling fluid, and the other end is connected to a cooling fluid outlet for discharging cooling fluid. The condenser has a cooling channel capable of exchanging heat with the gaseous adsorbent in the condensation chamber. One end of the cooling channel is connected to the cooling fluid outlet.

[0007] In some embodiments, in the above-described adsorption refrigeration system, the cooling fluid first passes through the adsorption bed and then enters the condenser for heat absorption. When the temperature of the gaseous adsorbent entering the adsorption chamber during the adsorption stage is lower than the preset value, and / or the temperature of the heat source fluid entering the adsorption bed is higher than the preset value, the desorption time will be shorter and / or the adsorption time will be longer, resulting in a smaller ratio of desorption time to adsorption time. By first passing the cooling fluid through the adsorption bed, the adsorption time is shortened, and then it passes through the cooling channel of the condenser, which lengthens the desorption time, thus correcting the situation and ensuring the adsorption refrigeration effect of the adsorption refrigeration system. Therefore, the problem of poor adsorption performance in adsorption refrigeration systems can be effectively solved.

[0008] In some technical solutions, a first heating fluid interface and a second heating fluid interface are also included; one end of the heat exchange channel can be optionally connected to one of the cooling fluid inlet and the first heating fluid interface through a first valve device; the other end of the heat exchange channel can be optionally connected to one of the cooling fluid outlet and the second heating fluid interface through a second valve device.

[0009] In some technical solutions, a cooling fluid supply interface, a cooling fluid discharge interface, and a third valve device are also included. When the third valve device is working in the first working state, the cooling fluid supply interface, the heat exchange channel, the cooling channel, and the cooling fluid discharge interface are connected in series. When the third valve device is working in the second working state, the heat exchange channel and the cooling channel are arranged in parallel and connected in series between the cooling fluid supply interface and the cooling fluid discharge interface.

[0010] In some technical solutions, multiple adsorption beds are included, and the heat exchange channel of each adsorption bed can be optionally connected between the cooling fluid inlet and the cooling fluid outlet through the first valve device, and can be optionally connected to the first heating fluid interface and the second heating fluid interface through the second valve device.

[0011] In some technical solutions, a controller is also included; when the adsorption bed is in the adsorption stage, the controller can first control the third valve device to work in the first working state, until the adsorption bed cools down to a preset temperature, and then control the third valve device to switch to the second working state.

[0012] In some technical solutions, the preset temperature is the temperature of the cooling fluid supply interface plus a set temperature difference, where the set temperature difference is between 2 and 3 degrees Celsius.

[0013] In some technical solutions, a controller and a detection device are also included. The detection device is used to detect and indirectly obtain the ratio of desorption time to adsorption time. When the ratio of desorption time to adsorption time increases to a first set value, the controller controls the third valve device to switch from a first working state to a second working state, and / or when the ratio of desorption time to adsorption time decreases to a second set value, the controller controls the third valve device to switch from a second working state to a first working state.

[0014] Some technical solutions also include an evaporator;

[0015] The evaporation chamber of the evaporator is optionally connected to the adsorption chambers corresponding to different adsorption beds in the plurality of adsorption beds through the first valve group. The evaporator is also provided with a refrigeration fluid channel for heat exchange with the liquid adsorption working fluid in the evaporation chamber.

[0016] The condenser's condensation chamber is optionally connected to the adsorption chambers corresponding to different adsorption beds in the plurality of adsorption beds via a second valve group;

[0017] The first end of each heat exchange channel is optionally connected to a first heating fluid interface via a first multi-way valve, and the second end of each heat exchange channel is optionally connected to a second heating fluid interface via a second multi-way valve.

[0018] The first end of each heat exchange channel is optionally connected to the cooling fluid inlet via a third multi-way valve, and the second end of each heat exchange channel is optionally connected to the cooling fluid outlet via a fourth multi-way valve.

[0019] In some technical solutions, a cooling fluid supply interface, a cooling fluid discharge interface, and a reversing valve are also included; when the valve core of the reversing valve is working in the first reversing position: the cooling fluid supply interface is connected to the cooling fluid inlet and one end of the cooling channel, and the cooling fluid supply outlet is connected to the cooling fluid outlet and the other end of the cooling channel;

[0020] When the valve core of the reversing valve is in the second reversing position: the cooling fluid supply interface is connected to the cooling fluid inlet, the cooling fluid outlet is connected to one end of the cooling channel, and the other end of the cooling channel is connected to the cooling fluid supply outlet.

[0021] To achieve the second objective mentioned above, the present invention also provides a server liquid cooling system, which includes any of the aforementioned adsorption refrigeration systems, and further includes a cold tower and a server liquid cooling device. The cold tower supplies cooling water to the heat exchange channels of the adsorption bed and the cooling channels of the condenser in the adsorption refrigeration system; the server liquid cooling device provides heating fluid to the adsorption bed. Since the aforementioned adsorption refrigeration system has the above-mentioned technical effects, the server liquid cooling system having this adsorption refrigeration system should also have corresponding technical effects.

[0022] To achieve the third objective mentioned above, the present invention also provides an adsorption refrigeration control method applied to the adsorption refrigeration system described above, comprising: controlling the third valve device to operate in a first operating state when a first condition is currently met; and controlling the third valve device to operate in a second operating state when a second condition is currently met. Since the adsorption refrigeration system described above has the aforementioned technical effects, the control method applied to this adsorption refrigeration system should also have corresponding technical effects.

[0023] In some technical solutions, the first condition includes: the adsorption bed is in the adsorption stage, and the temperature of the adsorption bed is higher than a preset temperature;

[0024] The second condition includes: the adsorption bed is in the adsorption stage, and the temperature of the adsorption bed is not higher than a preset temperature.

[0025] In some technical solutions, the first condition includes: when the third valve device is working in the second working state, the ratio of the desorption time to the adsorption time of the adsorption bed is reduced to a second set value;

[0026] The second condition includes: when the third valve device is operating in the first operating state, the ratio of the desorption time to the adsorption time of the adsorption bed is increased to a first set value.

[0027] To achieve the fourth objective mentioned above, the present invention also provides a computer-readable storage medium for storing a computer program that, when executed by a processor, implements the adsorption-cooling control method as described above. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of the series adsorption refrigeration system provided in an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the adsorption refrigeration system with series and parallel switching provided in an embodiment of the present invention.

[0031] The following labels are shown in the attached diagram:

[0032] 1. Adsorption bed; 2. First heating fluid interface; 3. Heat exchange channel; 4. Cooling fluid inlet; 5. Second heating fluid interface; 6. Cooling fluid outlet; 7. Condenser; 8. Evaporator; 9. First valve group; 10. Second valve group; 11. Reversing valve; 12. First multi-way valve; 13. Third multi-way valve; 14. Fourth multi-way valve; 15. Cooling channel; 16. First reversing position; 17. Cooling fluid supply interface; 18. Cooling fluid discharge interface; 19. Refrigeration fluid channel; 20. Second reversing position; 21. Detailed Implementation

[0033] This invention discloses an adsorption refrigeration system to effectively address the problem of poor adsorption performance in adsorption refrigeration systems.

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figures 1-2 , Figure 1 This is a schematic diagram of the structure of the series adsorption refrigeration system provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the adsorption refrigeration system with series and parallel switching provided in an embodiment of the present invention.

[0036] In some embodiments, an adsorption refrigeration system is provided, which mainly includes an adsorption bed 1 and a condenser 7, and generally also includes an evaporator 8.

[0037] The adsorption chamber of adsorption bed 1 is equipped with an adsorbent, and the working fluid used in conjunction with the adsorbent flows through the adsorption chamber and the condensation chamber of condenser 7, and also flows through evaporator 8. The working fluid and adsorbent are combined to form a working fluid pair. In an adsorption refrigeration system, multiple sets of working fluid pairs can be set. One adsorbent can correspond to multiple working fluids, or multiple adsorbents can correspond to one working fluid.

[0038] For adsorption bed 1, there are two main working states: adsorption and desorption, which are generally carried out in stages. In the adsorption state, a low-temperature fluid is used to cool adsorption bed 1, allowing the adsorbent within bed 1 to adsorb the gaseous working medium, ensuring continuous adsorption capacity until the adsorbent reaches a preset saturation state. Taking physical adsorption as an example, the gaseous working medium liquefies into a liquid state, maintaining a low-pressure state within the adsorption chamber to continuously draw in gaseous working medium, such as continuously adsorbing the gaseous working medium from evaporator 8, enabling continuous evaporation and heat absorption in evaporator 8. In the desorption state, a high-temperature fluid is generally used to heat adsorption bed 1, causing the working medium within the adsorbent to desorb from the adsorbent, reforming into a gaseous state. This gaseous working medium then enters condenser 7, where it liquefies into a liquid state. It should be noted that a heat exchange channel 3 can be provided to alternately circulate high-temperature fluid and low-temperature fluid; or a heat exchange channel 3 can be provided specifically for low-temperature fluid, while another heat exchange channel 3 can be provided specifically for high-temperature fluid; or only a heat exchange channel 3 for low-temperature fluid can be provided, and the desorption stage of the adsorption bed 1 is not through high-temperature fluid, but through other heat-conducting structures, such as metal heat-conducting components.

[0039] The adsorption bed 1 has a heat exchange channel 3 for heat exchange with the adsorbent in the adsorption chamber. Here, heat exchange channel 3 refers to a channel through which a low-temperature fluid flows, so that the low-temperature fluid flows through the heat exchange channel 3 during the adsorption phase of the adsorption bed 1. During the desorption phase, the heat exchange channel 3 can be closed or used to allow the flow of a high-temperature fluid. The heat exchange channel 3 can exchange heat with the adsorbent, so that during the adsorption phase, the low-temperature fluid flows through the heat exchange channel 3, keeping the entire adsorption chamber at a low temperature. Furthermore, the heat released by the gaseous adsorbent when it is adsorbed by the adsorbent can be absorbed by the low-temperature fluid in the heat exchange channel 3 and carried away.

[0040] The condenser 7's condensing chamber receives the gaseous adsorbent discharged from the adsorption chamber of adsorption bed 1. In a system with multiple adsorption beds 1, it is not required that all adsorbents desorbed from the adsorption bed 1 flow to the condenser 7 during the desorption stage. If the adsorption refrigeration system is a multi-stage circulating system, the adsorption chambers of multiple adsorption beds 1 are connected in series. In this case, only the gaseous adsorbent generated by the last adsorption bed 1 during the desorption stage enters the condenser 7. It should also be noted that the adsorption bed 1 connected to the condensing chamber and the adsorption bed 1 equipped with the heat exchange channel 3 can be the same adsorption bed 1 or different adsorption beds 1.

[0041] The condenser 7 has a cooling channel 16 that can exchange heat with the gaseous adsorbent in the condensation chamber. When a low-temperature fluid flows in the cooling channel 16, the low-temperature fluid can absorb heat from the gaseous adsorbent, so that the gaseous adsorbent can release heat and condense into a liquid adsorbent, thereby generating a continuous suction force on the corresponding adsorption chamber.

[0042] The heat exchange channel 3 has a cooling fluid inlet 4 at one end and a cooling fluid outlet 6 at the other end. The cooling channel 16 has an inlet at one end connected to the cooling fluid outlet 6. The cooling fluid entering through the cooling fluid inlet 4 first enters the heat exchange channel 3, absorbs heat, and then heats up. It then flows out of the cooling fluid outlet 6 and enters the cooling channel 16, where it further absorbs heat and heats up. Finally, it exits through the outlet of the cooling channel 16. After exiting the outlet of the cooling channel 16, it can be discharged into the external environment through the cooling fluid discharge port 19, such as into a cooling tower for further cooling. Alternatively, if the temperature is still relatively high, it can be discharged into a heat source device for reheating and reuse as a heat source fluid.

[0043] In some embodiments, in the above-described adsorption refrigeration system, the cooling fluid first passes through the adsorption bed 1 and then enters the condenser 7 for heat absorption. During the adsorption phase, the more stable the temperature of the adsorption bed 1, the better the adsorption effect. Generally, the temperature fluctuation of the external cooling fluid is smaller than that of the fluid at the outlet of the cooling channel 16 of the condenser 7. Therefore, the temperature fluctuation of the fluid at the outlet of the heat exchange channel 3 will also be relatively small, and the smaller the temperature difference between the outlet and inlet of the heat exchange channel 3, the better. By having the cooling fluid pass through the heat exchange channel 3 first and then enter the cooling channel 16, the adsorption effect of the adsorption bed 1 can be improved. This is not only because the fluid temperature in the heat exchange channel 3 is more uniform, but also because the condenser 7 has a smaller impact on the heat exchange channel 3. The reason for the smaller impact on the condenser 7 is that the entry of the gaseous adsorbent from the adsorption bed 1 into the condenser 7 is related not only to the temperature of the condenser 7 but also to the temperature of the heating fluid in the adsorption chamber, with the latter having a greater impact. Therefore, small adjustments to the temperature of the condenser 7 have a relatively small impact on the desorption phase. Thus, the problem of poor adsorption effect in the adsorption refrigeration system can be effectively solved.

[0044] In some embodiments, in the above-described adsorption refrigeration system, the cooling fluid first passes through the adsorption bed 1 and then enters the condenser 7 for heat absorption. When the temperature of the gaseous adsorbent entering the adsorption chamber during the adsorption stage is lower than the preset value, and / or the temperature of the heat source fluid entering the adsorption bed 1 during the desorption stage is higher than the preset value, the desorption time will be shorter and / or the adsorption time will be longer. That is, the lower the temperature of the gaseous adsorbent or the lower the temperature of the cooling fluid, the better the adsorption effect and the shorter the adsorption time; the higher the temperature of the heat source fluid, the better the desorption effect and the shorter the desorption time. This leads to a smaller ratio between the current desorption time and adsorption time. At this time, the cooling fluid first passes through the adsorption bed 1, which facilitates a shorter adsorption time. Then, it passes through the cooling channel 16 of the condenser 7, resulting in a relatively higher temperature in the condenser 7, a weaker condensation effect, and a longer condensation time. This corrects the tendency of the desorption time in the adsorption bed 1 to be longer, thus ensuring the adsorption refrigeration effect of the adsorption refrigeration system. Therefore, the problem of poor adsorption effect in the adsorption refrigeration system can be effectively solved.

[0045] In some embodiments, when an adsorption bed 1 is in the desorption stage, a high-temperature fluid is typically introduced into the adsorption bed 1. Since the adsorption and desorption stages need to be staggered, the heating and cooling fluids can share a single heat exchange channel 3. Specifically, the adsorption refrigeration system can further include a first heating fluid interface 2 and a second heating fluid interface 5, for introducing and discharging heating fluid, respectively. Generally, the first heating fluid interface 2 is used for introducing heating fluid, while the second heating fluid interface 5 is used for discharging heating fluid.

[0046] Furthermore, one end of the heat exchange channel 3 can be selectively connected to either the cooling fluid inlet 4 or the first heating fluid interface 2 via a first valve device; while the other end of the heat exchange channel 3 can be selectively connected to either the cooling fluid outlet 6 or the second heating fluid interface 5 via a second valve device. When an adsorption bed 1 is in the adsorption stage, one end of the heat exchange channel 3 is connected to the cooling fluid inlet 4 via the first valve device and disconnected from the first heating fluid interface 2; the other end of the heat exchange channel 3 is connected to the cooling fluid outlet 6 via the second valve device and disconnected from the second heating fluid interface 5. When an adsorption bed 1 is in the desorption stage, one end of the heat exchange channel 3 is disconnected from the cooling fluid inlet 4 via the first valve device and connected to the first heating fluid interface 2; the other end of the heat exchange channel 3 is disconnected from the cooling fluid outlet 6 via the second valve device and connected to the second heating fluid interface 5. The first heating fluid interface 2 is the heating fluid inlet, and the second heating fluid interface 5 is the heating fluid outlet. The heating fluid enters through the heating fluid inlet and then flows into the heat exchange channel 3, and then flows out from the heat exchange channel 3 to the heating fluid outlet, ensuring that the flow direction of the heating fluid is consistent with that of the cooling fluid to better meet mass and heat transfer requirements. Alternatively, the first heating fluid interface 2 can be the heating fluid outlet, and the second heating fluid interface 5 can be the heating fluid inlet, making the flow direction of the heating fluid opposite to that of the cooling fluid to achieve counter-flow and further reduce heat loss.

[0047] The first valve device can be a valve group formed by combining multiple on / off valves, or a valve group formed by combining multiple multi-way valves, or a directional valve 11. Correspondingly, the second valve device can be a valve group formed by combining multiple on / off valves, or a valve group formed by combining multiple multi-way valves, or a directional valve 11. Alternatively, the first valve device and the second valve device can be integrated into the same directional valve 11.

[0048] In some embodiments, considering fluctuations in the temperature of the heat source fluid, fluctuations in the temperature of the chilled fluid in the evaporator 8, or even fluctuations in the temperature of the cooling fluid, any of the above fluctuations, or even other fluctuations, will cause changes in the ratio of desorption time to adsorption time.

[0049] Therefore, this configuration preferably also includes a cooling fluid supply port 18, a cooling fluid discharge port 19, and a third valve device. When the third valve device operates in the first operating state, the cooling fluid supply port 18, the heat exchange channel 3, the cooling channel 16, and the cooling fluid discharge port 19 are connected in series. When the third valve device operates in the second operating state, the heat exchange channel 3 and the cooling channel 16 are connected in parallel and connected in series between the cooling fluid supply port 18 and the cooling fluid discharge port 19. Therefore, if external factors cause the ratio of desorption time to adsorption time to the set value to increase when the third valve device is operating in the first operating state, the third valve device can be switched to the second operating state. In this state, the desorption time will decrease, while the adsorption time will increase, thus reducing the ratio of desorption time to adsorption time and correcting the situation in the opposite direction. When the third valve device is operating in the second working state, if external factors cause the ratio of desorption time to adsorption time to the set value to decrease, the third valve device can be switched to the first working state. In this state, the desorption time will increase, while the adsorption time will decrease, thus increasing the ratio of desorption time to adsorption time to correct the imbalance. In the series connection state, the temperature of the cooling fluid entering the condenser is relatively high, resulting in a weaker condensation effect and a longer desorption time.

[0050] The third valve device can be a valve group with multiple on / off valves to control each branch separately, or it can be a valve group formed by combining multiple three-way valves, or it can be a directional valve 11. Of course, the third valve device can also be combined with other valves to form a directional valve 11.

[0051] In some embodiments, a controller may be provided to control the third valve device to operate in a first operating state or a second operating state according to preset requirements or in response to corresponding instructions.

[0052] In some embodiments, the cooling required for adsorption bed 1 is not entirely the same in the early and late stages of the adsorption phase. Specifically, in the early stage of the adsorption phase, the temperature of adsorption bed 1 is relatively high because it has just exited the desorption phase. Even in a reflux system that has undergone reflux, the temperature of adsorption bed 1 is still relatively high. Therefore, in order to complete the adsorption action as quickly as possible, there is a cooling phase in the early stage of the adsorption phase. The higher the efficiency, the better. However, the higher the efficiency, the greater the cooling required.

[0053] As mentioned above, in the initial stage of the adsorption phase, the controller can operate the third valve device in the first working state, i.e., in series, so that the low-temperature cooling fluid is preferentially used to cool the adsorption bed 1, enabling rapid cooling of the adsorption bed 1. However, it is necessary to ensure that the outlet water temperature of the heat exchange channel 3 is not too high, otherwise it will affect the operation of the condenser 7. In the middle stage of the adsorption phase, the third valve device can be controlled to operate in the second working state, i.e., in parallel. At this time, the required cooling capacity will not be too large due to the flow area, evaporation rate, etc. In the later stage of the adsorption phase, it can remain in the parallel state or switch to the series state. Maintaining the parallel state can prevent the temperature of the adsorption bed 1 from being too low, which would prolong the desorption phase. Switching to the series state can further improve the cooling efficiency, thereby increasing the adsorption capacity. This is because in the later stage of the adsorption phase, the adsorption bed's demand for cooling fluid decreases. If there is too much cooling fluid, it will cause the adsorption bed temperature to be too low, requiring more heat to enter the desorption phase, or prolonging the desorption phase if the heat source fluid maintains a constant flow rate. Therefore, if the parallel connection is maintained, some of the low-temperature cooling fluid is diverted to the condenser, resulting in less cooling fluid entering the adsorption bed, which is currently in the later stage of adsorption, thus shortening the duration of the subsequent desorption stage. If the connection is switched to a series connection, the cooling fluid entering the condenser will further reduce the temperature of the liquid adsorbent in the condenser, making it easier for the liquid adsorbent to be adsorbed when it enters the adsorption bed in the adsorption stage, thereby increasing the adsorption capacity.

[0054] In one implementation, the controller can initially operate the third valve device in a first operating state when the adsorption bed 1 is in the adsorption stage, until the adsorption bed 1 cools down to a preset temperature, at which point the third valve device switches to a second operating state. That is, when the adsorption bed 1 switches to the adsorption stage, i.e., enters the initial stage of adsorption, the third valve device is initially operated in the first operating state, and the temperature of the adsorption bed 1 is monitored in real time. As the temperature of the adsorption bed 1 gradually decreases until it reaches the preset temperature, no high-power cooling is required, and the system can enter a parallel operation state to reduce cooling power. The preset temperature can be considered as the minimum suitable temperature at which the adsorption bed 1 descends to the adsorption stage. This temperature is generally determined by comprehensively considering factors such as the performance of the adsorbent, the temperature of the cooling fluid, and the temperature of the chilled water in the evaporator 8. Alternatively, the preset temperature can also be the switching temperature when the adsorption chamber and the evaporation chamber of the evaporator 8 are connected, meaning that the adsorbent has adsorption capacity at this time. Of course, the preset temperature can also be set to correspond to the temperature of the cooling fluid supply interface 18, meaning that it cannot be too high than the aforementioned temperature. For example, the preset temperature Ty is the temperature Tj of the cooling fluid supply interface 18 plus a set temperature difference Tc, where Tc cannot be too large, generally between 2 and 3 degrees Celsius. The specific setting can be adjusted according to needs.

[0055] Another implementation scheme may include a controller and a detection device, wherein the detection device is used to indirectly obtain the ratio of desorption time to adsorption time. Specifically, there are three main methods for obtaining this ratio: one is to detect only the desorption time and compare it with a pre-stored adsorption time; another is to detect only the adsorption time and compare it with a pre-stored desorption time; and the third is to simultaneously detect and obtain both the adsorption and desorption times separately.

[0056] One method for detecting desorption duration is by determining the completion time. This completion time can be determined by the flow rate or pressure of the gaseous working fluid at the adsorption chamber outlet. The start time can be determined by the opening time of the valve connecting the adsorption chamber and the condensation chamber, or by whether the adsorption chamber reaches the desorption temperature during the preheating stage. Another method is to determine the desorption duration by the temperature difference between the entering and exiting heating fluid. During desorption, the temperature difference is generally large; once desorption is complete, the temperature difference will decrease significantly because there is no more heat absorption by the adsorbed working fluid. Other methods can also be used.

[0057] One method for detecting and obtaining the adsorption duration is by determining the time point at which adsorption is completed. This completion time can be determined by the inlet flow rate or pressure of the gaseous working fluid in the adsorption chamber. The start time can be determined by the opening time of the connecting valve between the adsorption chamber and the evaporation chamber, or by whether the adsorption chamber cools down to the adsorption temperature during the pre-cooling stage. Another method is to determine the adsorption duration by the temperature difference between the incoming and outgoing cooling fluid. During adsorption, the temperature difference is generally large; once adsorption is complete, the temperature difference will decrease significantly because there is no longer any heat release from the adsorbed working fluid.

[0058] As described above, the controller switches the third valve device from the first operating state to the second operating state when the ratio of desorption time to adsorption time increases to a first set value, and / or the controller switches the third valve device from the second operating state to the first operating state when the ratio of desorption time to adsorption time decreases to a second set value. The first and second set values ​​can be preset or updated later based on long-term operating averages.

[0059] In some embodiments, as shown in the appendix Figure 1 , 2 As shown.

[0060] The evaporator 8 has an evaporation chamber that can be optionally connected to the adsorption chambers of different adsorption beds 1 in the plurality of adsorption beds 1 via a first valve group 9. The evaporator 8 also has a chilled fluid channel 20 for heat exchange with the liquid adsorbent in the evaporation chamber. The chilled fluid channel 20 is used to cool the object being cooled. Generally, the chilled fluid channel 20 and the channel in the object being cooled form a circulating flow, so that after absorbing heat in the object being cooled, it flows back into the chilled fluid channel 20 and then releases heat in the evaporator 8, causing the liquid adsorbent in the evaporation chamber to evaporate and carry away the heat. When the adsorption bed 1 is in the adsorption stage, the adsorption chamber of the adsorption bed 1 is connected to the evaporation chamber, allowing the gaseous adsorbent in the evaporation chamber to enter the adsorption chamber and be adsorbed by the adsorbent. The first valve group 9 can be a multi-way valve or a valve group formed by combining multiple switching valves. As shown in the attached figure, the outlet of the evaporation chamber is connected to the adsorption chamber of each adsorption bed 1 via multiple switching valves. It should be noted that there can be one evaporator 8 or multiple evaporators 8.

[0061] The condensing chamber of condenser 7 is optionally connected to the adsorption chambers of different adsorption beds 1 in the plurality of adsorption beds 1 through the second valve group 10. The condenser 7 is also provided with a cooling fluid channel for heat exchange with the gaseous adsorbent in the condensing chamber. The cooling channel 16 mainly introduces external cooling water to absorb heat from the gaseous adsorbent in the condensing chamber, allowing the gaseous adsorbent to condense into a liquid adsorbent, thus enabling continuous intake of gaseous adsorbent from the corresponding adsorption chamber. When the adsorption bed 1 is in the desorption stage, the adsorption chamber of that adsorption bed 1 is connected to the condensing chamber. The second valve group 10 can be a multi-way valve or a valve group formed by combining multiple switching valves. As shown in the attached figure, the inlet of the condensing chamber is connected to the adsorption chamber of each adsorption bed 1 through multiple switching valves. It should be noted that there can be one condenser 7 or multiple condensers 7.

[0062] Each heat exchange channel 3 has its first end optionally connected to a first heating fluid interface 2 via a first multi-way valve 12, and its second end optionally connected to a second heating fluid interface 5 via a second multi-way valve 13. The first heating fluid interface 2 and the second heating fluid interface 5 are respectively a heating fluid inlet and a heating fluid outlet. For a single heat exchange channel 3: if the flow direction of the heating fluid is the same as the flow direction of the cooling fluid, then the first heating fluid interface 2 is the heating fluid inlet; if the flow direction of the heating fluid is opposite to the flow direction of the cooling fluid, then the first heating fluid interface 2 is the heating fluid outlet.

[0063] Taking the first heating fluid interface 2 as an example, where the heating fluid inlet is used as the illustration. The first end of each heat exchange channel 3 is connected to each outlet of the first multi-way valve 12, while the inlet of the first multi-way valve 12 is connected to the first heating fluid interface 2. The inlet of the first multi-way valve 12 can optionally be connected only to a portion of its outlets, while the other portion of the outlets and inlet are closed. The second end of each heat exchange channel 3 is connected to each inlet of the second multi-way valve 13, while the outlet of the second multi-way valve 13 is connected to the second heating fluid interface 5. The outlet of the first multi-way valve 12 can optionally be connected only to a portion of its inlet, while the other portion of the inlet and outlet are closed. When a heat exchange channel 3 is open, the corresponding outlet of the first multi-way valve 12 and the corresponding inlet of the second multi-way valve 13 must be connected to allow the heating fluid to circulate within the heat exchange channel 3.

[0064] Each heat exchange channel 3 has its first end optionally connected to a cooling fluid inlet 4 via a third multi-way valve 14, and its second end optionally connected to a cooling fluid outlet 6 via a fourth multi-way valve 15. The first end of each heat exchange channel 3 is connected to its respective outlet of the third multi-way valve 14, while the inlet of the third multi-way valve 14 is connected to the cooling fluid inlet 4. The inlet of the third multi-way valve 14 can optionally be connected only to a portion of its outlets, while the other portion of the outlets and inlet are closed. The second end of each heat exchange channel 3 is connected to its respective inlet of the fourth multi-way valve 15, while the outlet of the fourth multi-way valve 15 is connected to the cooling fluid outlet 6. The outlet of the first multi-way valve 12 can optionally be connected only to a portion of its inlets, while the other portion of the inlet and outlet are closed. When a heat exchange channel 3 is open, the corresponding outlet of the third multi-way valve 14 and the corresponding inlet of the fourth multi-way valve 15 must be connected to allow the cooling fluid to circulate within the heat exchange channel 3.

[0065] As attached Figure 1 As shown, the cooling fluid outlet 6 is connected to one end of the cooling channel 16 inlet, and the other end of the cooling channel 16 is connected to the cooling fluid outlet 19. The cooling fluid inlet 4 is connected to the cooling fluid supply outlet 18. In practical applications, the cooling fluid supply outlet 18 can be connected to the supply port of the cooling tower, while the cooling fluid outlet 19 can be connected to the return port of the cooling tower. The cooling tower can be a wet cooling tower or a mixed wet and dry cooling tower.

[0066] As attached Figure 2As shown, when series-parallel switching is required, a reversing valve 11 is preferably provided here for convenient switching. When the valve core of the reversing valve 11 is working in the first reversing position 17: the cooling fluid supply interface 18 is connected to the cooling fluid inlet 4 and one end of the cooling channel 16, and the cooling fluid supply outlet is connected to the cooling fluid outlet 6 and the other end of the cooling channel 16, so as to achieve parallel connection. When the valve core of the reversing valve 11 is working in the second reversing position 21: the cooling fluid supply interface 18 is connected to the cooling fluid inlet 4, the cooling fluid outlet 6 is connected to one end of the cooling channel 16, and the other end of the cooling channel 16 is connected to the cooling fluid supply outlet, so as to achieve series connection.

[0067] Specifically, the reversing valve 11 can be referred to as a two-position six-way reversing valve 11, forming ports A to F. Port A is used to connect to the cooling fluid supply port 18, port B is used to connect to the cooling fluid supply outlet, port C is used to connect to the inlet of the third multi-way valve 14, port D is used to connect to the outlet of the fourth multi-way valve 15, port E is used to connect to the inlet end of the cooling channel 16 of the condenser 7, and port F is used to connect to the outlet end of the cooling channel 16 of the condenser 7. For the cooling channel 16, the inlet and outlet ends can be arbitrarily selected or selected according to needs.

[0068] When the first section of the directional control valve 11 is in the working position, i.e., the valve core is working in the first reversing position 17, the internal channel relationship of the first section allows ports A, C, and E to be connected, while ports B, D, and F are connected. When the valve core of the directional control valve 11 moves to the second section, which is then in the working position, the valve core is working in the second reversing position 21. The internal communication relationship of the second section allows ports A and C to be connected, ports D and E to be connected, and ports F and B to be connected.

[0069] In some embodiments, unless otherwise stated or contradicted, the adsorption refrigeration system comprises an adsorption working fluid circulation system consisting of an adsorption bed 1, a condenser 7, and an evaporator 8, which may specifically constitute a multi-stage circulation system, a return circulation system, a heat wave circulation system, or other circulation systems.

[0070] In some embodiments, for ease of control, some or all of the above-mentioned valves or valve units are electrically controlled valves, so as to facilitate control by a controller.

[0071] Based on the adsorption refrigeration system provided in the above embodiments, the present invention also provides a server liquid cooling system. This server liquid cooling system includes any one of the adsorption refrigeration systems described in the above embodiments, and further includes a cold tower and a server liquid cooling device. The cold tower supplies cooling water to the heat exchange channel 3 of the adsorption bed 1 and the cooling channel 16 of the condenser 7 of the adsorption refrigeration system; the server liquid cooling device provides heating fluid to the adsorption bed 1. Since this server liquid cooling system uses the adsorption refrigeration system described in the above embodiments, the beneficial effects of this server liquid cooling system are explained in the above embodiments.

[0072] Specifically, in application, the supply port of the cold tower is connected to the cooling fluid supply interface 18 of the adsorption refrigeration system, while the cooling fluid discharge interface 19 can be connected to the heat exchange fluid inlet of the server liquid cooling equipment and / or to the return port of the cold tower. The heat exchange fluid outlet of the server liquid cooling equipment is connected to the heating fluid inlet, while the heating fluid outlet is connected to the heat exchange fluid inlet of the server liquid cooling equipment and / or to the return port of the cold tower.

[0073] Specifically, the cooling tower can be a water-cooled cooling tower, a wet-dry cooling tower, or a dry cooling tower.

[0074] Based on the adsorption refrigeration system provided in the above embodiments, the present invention also provides a control method for the refrigeration system of the system, comprising: when a preset first condition is met, controlling the third valve device to operate in a first operating state, that is, the cooling fluid supply interface 18, the heat exchange channel 3, the cooling channel 16 and the cooling fluid discharge interface 19 are connected in series; when a preset second condition is met, controlling the third valve device to operate in a second operating state, that is, the heat exchange channel 3 and the cooling channel 16 are arranged in parallel and connected in series between the cooling fluid supply interface 18 and the cooling fluid discharge interface 19.

[0075] Since this control method can also achieve the adjustment and control of the working state of the third valve device, please refer to the above embodiments for the beneficial effects of this control method.

[0076] In some embodiments, the first condition includes: the adsorption bed 1 is in the adsorption stage, and the temperature of the adsorption bed 1 is higher than a preset temperature; the second condition includes: the adsorption bed 1 is in the adsorption stage, and the temperature of the adsorption bed 1 is not higher than a preset temperature. This embodiment's condition setting method takes into account that the cooling capacity required by the adsorption bed 1 is not exactly the same in the early and late stages of the adsorption stage. Since there is a cooling phase in the early stage of adsorption, higher efficiency is better, but higher efficiency leads to a larger cooling capacity requirement in the early stage. Based on this, by adjusting the switching between series and parallel states based on the temperature of the adsorption bed 1, the third valve device can be controlled to operate in the first working state in the early stage, achieving series connection, so that the low-temperature cooling fluid is preferentially used to cool the adsorption bed 1, enabling rapid cooling of the adsorption bed 1, improving cooling efficiency, and thus increasing the adsorption capacity.

[0077] In some embodiments, the first condition includes: when the third valve device is operating in the second operating state, the ratio of desorption time to adsorption time of adsorption bed 1 is reduced to a second set value; the second condition includes: when the third valve device is operating in the first operating state, the ratio of desorption time to adsorption time of adsorption bed 1 is increased to the first set value. This condition setting method of the embodiment allows for a reverse correction effect if the actual measured and calculated ratio of desorption time to adsorption time is too large or too small compared to the set ratio value, by switching the operating state.

[0078] Embodiments of this application may also be computer-readable storage media storing computer program instructions thereon, which, when executed by a processor, cause the processor to perform the steps in the adsorption cooling control method according to various embodiments of this application described above.

[0079] The computer-readable storage medium may be any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may, for example, include, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatuses, or devices, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: electrical connections having one or more wires, portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0080] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0081] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An adsorption refrigeration system, characterized by, The device includes an adsorption bed (1) and a condenser (7). The condenser (7) has a condensation chamber for receiving the gaseous adsorbent discharged from the adsorption chamber of the adsorption bed (1). The adsorption bed (1) has a heat exchange channel (3) for exchanging heat with the adsorbent in the adsorption chamber. One end of the heat exchange channel (3) is connected to a cooling fluid inlet (4) for introducing cooling fluid, and the other end is connected to a cooling fluid outlet (6) for discharging cooling fluid. The condenser (7) has a cooling channel (16) for exchanging heat with the gaseous adsorbent in the condensation chamber. One end of the cooling channel (16) is connected to the cooling fluid outlet (6).

2. The adsorption refrigeration system according to claim 1, characterized in that, It also includes a first heating fluid interface (2) and a second heating fluid interface (5); one end of the heat exchange channel (3) can be optionally connected to one of the cooling fluid inlet (4) and the first heating fluid interface (2) through a first valve device; the other end of the heat exchange channel (3) can be optionally connected to one of the cooling fluid outlet (6) and the second heating fluid interface (5) through a second valve device.

3. The adsorption refrigeration system according to claim 2, characterized in that, It also includes a cooling fluid supply port (18), a cooling fluid discharge port (19) and a third valve device. When the third valve device is working in the first working state, the cooling fluid supply port (18), the heat exchange channel (3), the cooling channel (16) and the cooling fluid discharge port (19) are connected in series. When the third valve device is working in the second working state, the heat exchange channel (3) and the cooling channel (16) are arranged in parallel and connected in series between the cooling fluid supply port (18) and the cooling fluid discharge port (19).

4. The adsorption refrigeration system according to claim 3, characterized in that, It includes multiple adsorption beds (1), each of the adsorption beds (1) having its own heat exchange channel (3), which can be optionally connected between the cooling fluid inlet (4) and the cooling fluid outlet (6) via the first valve device, and can be optionally connected to the first heating fluid interface (2) and the second heating fluid interface (5) via the second valve device.

5. The adsorption refrigeration system according to claim 4, characterized in that, It also includes a controller; when the adsorption bed (1) is in the adsorption stage, the controller can first control the third valve device to work in the first working state until the adsorption bed (1) cools down to the preset temperature, and then control the third valve device to switch to the second working state.

6. The adsorption refrigeration system according to claim 5, characterized in that, The preset temperature is the temperature of the cooling fluid at the cooling fluid supply interface (18) plus a set temperature difference, which is between 2 degrees Celsius and 3 degrees Celsius.

7. The adsorption refrigeration system according to claim 3, characterized in that, It also includes a controller and a detection device, wherein the detection device is used to detect and indirectly obtain the ratio of desorption time to adsorption time; when the ratio of desorption time to adsorption time increases to a first set value, the controller controls the third valve device to switch from a first working state to a second working state, and / or when the ratio of desorption time to adsorption time decreases to a second set value, the controller controls the third valve device to switch from a second working state to a first working state.

8. The adsorption refrigeration system according to claim 1, characterized in that, It also includes the evaporator (8); The evaporation chamber of the evaporator (8) is optionally connected to the adsorption chambers of different adsorption beds (1) in the plurality of adsorption beds (1) through the first valve group (9). The evaporator (8) is also provided with a refrigeration fluid channel (20) for exchanging heat with the liquid adsorption working fluid in the evaporation chamber. The condenser (7) condensing chamber is optionally connected to the adsorption chambers corresponding to different adsorption beds (1) in the plurality of adsorption beds (1) through the second valve group (10); The first end of each heat exchange channel (3) is optionally connected to the first heating fluid interface (2) via the first multi-way valve (12), and the second end of each heat exchange channel (3) is optionally connected to the second heating fluid interface (5) via the second multi-way valve (13). The first end of each heat exchange channel (3) is optionally connected to the cooling fluid inlet (4) via a third multi-way valve (14), and the second end of each heat exchange channel (3) is optionally connected to the cooling fluid outlet (6) via a fourth multi-way valve (15).

9. The adsorption refrigeration system according to claim 8, characterized in that, It also includes a cooling fluid supply port (18), a cooling fluid discharge port (19), and a reversing valve (11). When the valve core of the reversing valve (11) is working in the first reversing position (17): the cooling fluid supply interface (18) is connected to one end of the cooling fluid inlet (4) and the cooling channel (16), and the cooling fluid supply outlet is connected to the other end of the cooling fluid outlet (6) and the cooling channel (16). When the valve core of the reversing valve (11) is working in the second reversing position (21): the cooling fluid supply interface (18) is connected to the cooling fluid inlet (4), the cooling fluid outlet (6) is connected to one end of the cooling channel (16), and the other end of the cooling channel (16) is connected to the cooling fluid supply outlet.

10. A server liquid cooling system, further comprising a cooling tower and server liquid cooling equipment, characterized in that, The adsorption refrigeration system as described in any one of claims 1-9 includes a cooling tower capable of supplying cooling water to the heat exchange channel (3) of the adsorption bed (1) and the cooling channel (16) of the condenser (7) of the adsorption refrigeration system; the server liquid cooling device is used to provide heating fluid to the adsorption bed (1).

11. An adsorption refrigeration control method, characterized in that, Applied to the adsorption refrigeration system as described in any one of claims 3 to 7, comprising: When the first condition is met, the third valve device is controlled to operate in the first operating state; when the second condition is met, the third valve device is controlled to operate in the second operating state.

12. The adsorption refrigeration control method according to claim 11, characterized in that, The first condition includes: the adsorption bed (1) is in the adsorption stage, and the temperature of the adsorption bed (1) is higher than the preset temperature; The second condition includes: the adsorption bed (1) is in the adsorption stage, and the temperature of the adsorption bed (1) is not higher than the preset temperature.

13. The adsorption refrigeration control method according to claim 11, characterized in that, The first condition includes: when the third valve device is working in the second working state, the ratio of the desorption time to the adsorption time of the adsorption bed (1) is reduced to a second set value; The second condition includes: when the third valve device is working in the first working state, the ratio of the desorption time to the adsorption time of the adsorption bed (1) is increased to a first set value.

14. A computer-readable storage medium, characterized in that, Used to store a computer program, which, when executed by a processor, implements the adsorption refrigeration control method as described in any one of claims 11 to 13.

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