Adsorption refrigeration system, control method thereof, server liquid cooling system, and storage medium

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, a condenser, a cooling fluid supply interface, and a cooling fluid discharge interface. The condenser's condensation chamber receives the gaseous adsorbent discharged from the adsorption chamber of the adsorption bed. The condenser has a cooling channel capable of exchanging heat with the gaseous adsorbent in the condensation chamber. The adsorption bed has a heat exchange channel for exchanging heat with the adsorbent in the adsorption chamber. It also includes a valve device. In a first operating state, the cooling fluid supply interface, cooling channel, heat exchange channel, and cooling fluid discharge interface are connected in series. In a second operating state, the heat exchange channel and cooling channel are connected in parallel and connected in series between the cooling fluid supply interface and the cooling fluid discharge interface. This invention effectively solves the problem of poor adaptability 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: In practical applications, the temperature of the heat source may fluctuate, the temperature of the chilled water in the evaporator may fluctuate, and the temperature of the cooling water may fluctuate. Moreover, these fluctuations will cause the ratio of adsorption time to desorption time to change, resulting in low refrigeration efficiency and poor adaptability of the adsorption refrigeration system. Summary of the Invention

[0004] In view of this, the first objective 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 adaptability of adsorption refrigeration systems.

[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, a condenser, a cooling fluid supply port, and a cooling fluid discharge port. The condenser's condensation chamber receives gaseous adsorbent discharged from the adsorption chamber of the adsorption bed. The condenser has a cooling channel capable of exchanging heat with the gaseous adsorbent in the condensation chamber. The adsorption bed has a heat exchange channel for exchanging heat with the adsorbent in the adsorption chamber. The system also includes a valve device. In a first operating state, the cooling fluid supply port, the cooling channel, the heat exchange channel, and the cooling fluid discharge port are connected in series. In a second operating state, the heat exchange channel and the cooling channel are connected in parallel and connected in series between the cooling fluid supply port and the cooling fluid discharge port.

[0007] In the above technical solution, the valve device allows for switching between series and parallel connections of the cooling and heat exchange channels. This enables the selection of a more suitable connection method based on changes in the obtained cooling fluid temperature. Alternatively, the adsorption time can be altered by switching different connection methods based on changes in the ratio of desorption to adsorption time caused by heat source temperature fluctuations or other factors. This also affects the desorption time, thus correcting the ratio of desorption to adsorption time and preventing downtime. In summary, this adsorption refrigeration system effectively solves the problem of poor adaptability in adsorption refrigeration systems.

[0008] In some technical solutions, when the valve device is operating in the third working state, the cooling fluid supply interface, the heat exchange channel, the cooling channel, and the cooling fluid discharge interface are connected in series.

[0009] In some technical solutions, an evaporator is also included. 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 a 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.

[0010] 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.

[0011] Some technical solutions also include a first heating fluid interface and a second heating fluid interface;

[0012] The first end of each heat exchange channel is optionally connected to the first heating fluid interface via a first multi-way valve, and the second end of each heat exchange channel is optionally connected to the second heating fluid interface via a second multi-way valve, so that heating fluid can be optionally introduced.

[0013] The first end of each heat exchange channel is optionally connected to the corresponding interface of the valve device via a third multi-way valve, and the second end of each heat exchange channel is optionally connected to the corresponding interface of the valve device via a fourth multi-way valve, so that cooling fluid can be optionally introduced.

[0014] In some technical solutions, the valve device is a three-position six-way directional valve. The three working positions of the three-position six-way directional valve correspond to the first working state, the second working state, and the third working state, respectively. The six ports of the three-position six-way directional valve are respectively connected to the cooling fluid supply port, the cooling fluid discharge port, the inlet end of the cooling channel, the outlet end of the cooling channel, the inlet end of the third multi-way valve, and the outlet end of the fourth multi-way valve.

[0015] In some technical solutions, a controller and a detection device are also included. The detection value of the detection device is used to obtain the ratio of the desorption time and the adsorption time. When the detection value of the detection device is at the first threshold, the controller controls the valve device to switch from the current first working state to the second working state, or from the current second working state to the third working state.

[0016] When the detection value of the detection device is at the second threshold, the controller controls the valve device to switch from the current third working state to the second working state and work for a predetermined time, or to switch from the current second working state to the first working state and work for a predetermined time.

[0017] When the detection value of the detection device is at the first threshold, the ratio of the current parsing time to the adsorption time is greater than the preset ratio of the parsing time to the adsorption time; when the detection value of the detection device is at the second threshold, the ratio of the current parsing time to the adsorption time is smaller than the preset ratio of the parsing time to the adsorption time.

[0018] In some technical solutions, the detection values ​​of the detection device include some or all of the following: the temperature of the heating fluid supply port, the flow rate of the heating fluid supply port, the temperature of the refrigeration fluid channel return port, and the flow rate of the refrigeration fluid channel return port.

[0019] In some technical solutions, a controller is also included. When the temperature of the cooling fluid supply interface is within a first preset temperature range, the controller controls the valve device to operate in the first operating state; when the temperature of the cooling fluid supply interface is within a second preset temperature range, the controller controls the valve device to operate in the second operating state; when the temperature of the cooling fluid supply interface is within a third preset temperature range, the controller controls the valve device to operate in the third operating state; the temperatures in the first preset temperature range, the second preset temperature range, and the third preset temperature range gradually increase.

[0020] Some technical solutions also include a temperature detector for detecting the cooling fluid supply interface.

[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 fluid to the heat exchange channel of the adsorption bed and the cooling channel of the condenser in the adsorption refrigeration system; the server liquid cooling device is used to supply 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 as described in any of the above claims, comprising: controlling the valve device to switch between different operating states according to preset conditions.

[0023] In some technical solutions, controlling the valve device to switch between different operating states according to preset conditions includes:

[0024] When it is determined that the ratio of the current desorption time to the adsorption time is greater than the preset ratio of the desorption time to the adsorption time, the valve device is controlled to switch from the current first working state to the second working state, or from the current second working state to the third working state.

[0025] When it is determined that the ratio of the current desorption time to the adsorption time is less than the preset ratio of the desorption time to the adsorption time, the valve device is controlled to switch from the current third working state to the second working state, or from the current second working state to the first working state.

[0026] When the valve device is operating in the third working state, the cooling fluid supply interface, the heat exchange channel, the cooling channel, and the cooling fluid discharge interface are connected in series.

[0027] In some technical solutions, controlling the valve device to switch between different operating states according to preset conditions includes:

[0028] When the temperature of the cooling fluid supply interface is within a first preset temperature range, the valve device is controlled to operate in the first working state;

[0029] When the temperature of the cooling fluid supply interface is within the second preset temperature range, the valve device is controlled to operate in the second working state;

[0030] When the temperature of the cooling fluid supply interface is within a third preset temperature range, the valve device is controlled to operate in the third working state;

[0031] The temperatures in the first preset temperature range, the second preset temperature range, and the third preset temperature range gradually increase; when the valve device is operating in the third operating state, the cooling fluid supply interface, the heat exchange channel, the cooling channel, and the cooling fluid discharge interface are connected in series.

[0032] To achieve the fourth objective mentioned above, the present invention also provides a computer-readable storage medium for storing a computer program, which, when executed by a processor, implements the adsorption refrigeration control method as described in any of the preceding claims. Attached Figure Description

[0033] 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.

[0034] Figure 1 This is a schematic diagram of the adsorption refrigeration system provided in an embodiment of the present invention.

[0035] The following labels are shown in the attached diagram:

[0036] 1. Adsorption bed; 2. First heating fluid interface; 3. Heat exchange channel; 4. Cooling fluid supply interface; 5. Second heating fluid interface; 6. Cooling fluid discharge interface; 7. Condenser; 8. Evaporator; 9. First valve group; 10. Second valve group; 11. Valve device; 12. First multi-way valve; 13. Second multi-way valve; 14. Third multi-way valve; 15. Fourth multi-way valve; 16. Cooling channel; 17. First working state; 18. Second working state; 19. Third working state. Detailed Implementation

[0037] This invention discloses an adsorption refrigeration system that can effectively solve the problem of poor adaptability of adsorption refrigeration systems.

[0038] 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.

[0039] Please see Figure 1 , Figure 1 This is a schematic diagram of the adsorption refrigeration system provided in an embodiment of the present invention.

[0040] In some embodiments, an adsorption refrigeration system is provided, which mainly includes an adsorption bed 1, a condenser 7, a cooling fluid supply interface 4, a cooling fluid discharge interface 6, and a valve device 11, and generally also includes an evaporator 8.

[0041] 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, as well as 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 provided. One adsorbent can be used for multiple working fluids, or multiple adsorbents can be used for one working fluid.

[0042] 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, re-forming 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 channel 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.

[0043] The adsorption bed 1 has a heat exchange channel 3 for heat exchange with the adsorbent in the adsorption chamber. Here, the heat exchange channel 3 refers to a channel capable of carrying a low-temperature fluid, 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 carry a high-temperature fluid. The heat exchange channel 3 can exchange heat with the adsorbent, ensuring that a low-temperature fluid flows through it during the adsorption phase, keeping the entire adsorption chamber at a low temperature. Furthermore, the heat released by the gaseous adsorbent during adsorption can be absorbed by the low-temperature fluid in the heat exchange channel 3 and carried away.

[0044] 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 during the desorption stage flow to the condenser 7. 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 produced 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.

[0045] 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.

[0046] Cooling fluid supply interface 4 is used to obtain cooling fluid, and cooling fluid discharge interface 6 is used to discharge the cooling fluid after heating the adsorption bed.

[0047] The adsorption refrigeration system also includes a valve device 11. When the valve device 11 is operating in the first operating state 17, the cooling fluid supply port 4, the cooling channel 16, the heat exchange channel 3, and the cooling fluid discharge port 6 are connected in series. When the valve device 11 is operating in the second operating state 18, the heat exchange channel 3 and the cooling channel 16 are arranged in parallel and connected in series between the cooling fluid supply port 4 and the cooling fluid discharge port 6.

[0048] In the above embodiments, the valve device 11 allows for switching between series and parallel connections of the cooling channel 16 and the heat exchange channel 3. This enables the selection of a more suitable connection method based on changes in the obtained cooling fluid temperature during operation. Alternatively, the adsorption time and ratio time can be altered based on fluctuations in the heat source temperature or other factors. By switching between different connection methods, the adsorption time can be changed, thus affecting the desorption time and allowing for correction to avoid downtime. In summary, this adsorption refrigeration system effectively solves the problem of poor adaptability in adsorption refrigeration systems.

[0049] In some embodiments, the valve device 11 can have a third operating state 19, wherein when the valve device 11 operates in the third operating state 19, the cooling fluid supply port 4, the heat exchange channel 3, the cooling channel 16, and the cooling fluid discharge port 6 are connected in series. The heat exchange channel 3 and the cooling channel 16 are connected in series in two ways: one is a bed-first series connection, where the heat exchange channel 3 comes first and the cooling channel 16 comes second, i.e., the cooling fluid passes through the heat exchange channel 3 first and then the cooling channel 16; the other is a bed-last series connection, where the heat exchange channel 3 comes second and the cooling channel 16 comes first, i.e., the cooling fluid passes through the cooling channel 16 first and then the heat exchange channel 3. The first operating state 17 uses the bed-last series connection, while the third operating state 19 uses the bed-first series connection. Of course, when multiple heat exchange channels 3 exist, they can also be connected in a cross-connection configuration.

[0050] In some embodiments, the evaporation chamber of the evaporator 8 is optionally connected to the adsorption chambers corresponding to different adsorption beds 1 in a plurality of adsorption beds 1 through the first valve group 9, and the evaporator 8 is also provided with a refrigeration fluid channel for heat exchange with the liquid adsorption working fluid in the evaporation chamber.

[0051] The condensing chamber of the condenser 7 can be 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.

[0052] Generally, to achieve continuous refrigeration, multiple adsorption beds 1 are connected in parallel, with at least some adsorption beds 1 having staggered desorption and adsorption time periods. For a specific adsorption bed 1, when entering the adsorption stage, it needs to be connected to the evaporation chamber through the first valve group 9 and disconnected from the condensation chamber through the second valve group 10; conversely, when entering the desorption stage, it needs to be disconnected from the evaporation chamber through the first valve group 9 and connected to the condensation chamber through the second valve group 10. The first valve group 9 and the second valve group 10 can be reversing valves, multi-way valves, or valve groups formed by combining multiple on / off valves. Alternatively, the first valve group 9 and the second valve group 10 can be combined into a single reversing valve.

[0053] The chilled fluid channel in evaporator 8 is used to cool the object being cooled. Generally, the chilled fluid channel and the channel in the object being cooled form a circulating flow so that after absorbing heat in the object being cooled, the fluid flows back into the chilled fluid channel. The chilled fluid channel and the liquid adsorbent in the evaporation chamber exchange heat, and then release heat in evaporator 8, causing the liquid adsorbent in the evaporation chamber to evaporate and carry away the heat. When adsorption bed 1 is in the adsorption stage, the adsorption chamber of 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.

[0054] In some embodiments, a first heating fluid interface 2 and a second heating fluid interface 5 are also included;

[0055] 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, so that heating fluid can be optionally introduced.

[0056] The first end of each heat exchange channel 3 is optionally connected to the corresponding interface of the valve device 11 via the third multi-way valve 14, and the second end of each heat exchange channel 3 is optionally connected to the corresponding interface of the valve device 11 via the fourth multi-way valve 15, so that cooling fluid can be optionally introduced.

[0057] Generally, in order to achieve continuous cooling, multiple adsorption beds 1 are set up in parallel. At least some adsorption beds 1 have staggered desorption and adsorption time periods. Therefore, cooling fluid can be selectively introduced into the heat exchange channel 3 of the adsorption bed 1 through the third multi-way valve 14 and the fourth multi-way valve 15.

[0058] As for the heating fluid that needs to be introduced during the analysis stage, other channels can be used, or the current heat exchange channel 3 can be used. As mentioned above, the heating fluid can be selectively introduced into the heat exchange channel 3 of the adsorption bed 1 through the first multi-way valve 12 and the second multi-way valve 13.

[0059] When adsorption bed 1 enters the adsorption stage, the corresponding ports of the third multi-way valve 14 and the fourth multi-way valve 15 are both open to introduce cooling fluid, while the corresponding ports of the first multi-way valve 12 and the second multi-way valve 13 are both closed to prevent the introduction of heating fluid. When adsorption is complete, the corresponding ports of the third multi-way valve 14 and the fourth multi-way valve 15 are closed to prevent the introduction of cooling fluid, while the corresponding ports of the first multi-way valve 12 and the second multi-way valve 13 are open to introduce heating fluid. Since different adsorption beds 1 are in different stages, at a certain time, while some adsorption beds 1 are in the adsorption stage, others are in the desorption stage. As shown in the attached diagram, when there are two adsorption beds 1, they are staggered. One adsorption bed 1 performs adsorption, while the other adsorption bed 1 simultaneously performs desorption. Then, one adsorption bed 1 transitions from adsorption to desorption, while the other adsorption bed 1 simultaneously transitions from desorption to adsorption, for continuous cooling. Considering that pre-cooling is required during the transition from desorption to adsorption, this time is generally short and can be ignored; however, other considerations are also possible.

[0060] 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.

[0061] 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 inlets, while the other portion of the inlet and outlet are closed.

[0062] Each heat exchange channel 3 has its first end connected to a respective outlet of a third multi-way valve 14, and the inlet of the third multi-way valve 14 is connected to the corresponding interface of the valve device 11. 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. Each heat exchange channel 3 has its second end connected to a respective inlet of a fourth multi-way valve 15, and the outlet of the fourth multi-way valve 15 is connected to the corresponding interface of the valve device 11. The outlet of the fourth multi-way valve 15 can optionally be connected only to a portion of its inlets, while the other portion of the inlet and outlet are closed.

[0063] In some embodiments, the valve device 11 is a three-position six-way directional valve. The three working positions of the three-position six-way directional valve correspond to the first working state 17, the second working state 18, and the third working state 19, respectively. The six ports of the three-position six-way directional valve are respectively connected to the cooling fluid supply port 4, the cooling fluid discharge port 6, the inlet end of the cooling channel 16, the outlet end of the cooling channel 16, the inlet end of the third multi-way valve 14, and the outlet end of the fourth multi-way valve 15.

[0064] Of course, valve device 11 can also be a combination valve, such as a combination of multiple on / off valves, a combination of multiple multi-way valves, or a combination of multi-way valves and on / off valves. However, for ease of control, valve device 11 is preferably a directional valve, because it needs to correspond to the six interfaces mentioned above: cooling fluid supply interface 4, cooling fluid discharge interface 6, inlet end of cooling channel 16, outlet end of cooling channel 16, inlet end of third multi-way valve 14, and outlet end of fourth multi-way valve 15. Therefore, it is called a six-way valve. If only the first working state 17 and the second working state 18 exist, a two-position six-way directional valve can be used. A three-position six-way directional valve has three switching positions to correspond to the first working state 17, the second working state 18, and the third working state 19, respectively.

[0065] The specific three-position six-way directional valve can be configured with ports A through F. Port A connects to the cooling fluid supply port 4, port B connects to the cooling fluid supply outlet, port C connects to the inlet of the third multi-way valve 14, port D connects to the outlet of the fourth multi-way valve 15, port E connects to the inlet of the cooling channel 16 of the condenser 7, and port F connects to the outlet of the cooling channel 16 of the condenser 7. The inlet and outlet ends of the cooling channel 16 can be arbitrarily selected or chosen according to specific needs.

[0066] When the first section of the directional control valve core is in the working position, the directional control valve operates in the first working state 17. Due to the internal channel relationship of the first section, ports A and E are connected, ports F and C are connected, and ports D and B are connected, achieving a series connection with the bed at the rear. As the second section of the valve core moves to the working position, the directional control valve operates in the second working state 18. Due to the internal channel relationship of the second section, ports A, C, and E are all connected, while ports B, D, and F are all connected, achieving a parallel connection. When the directional control valve core moves to the working position so that the third section is in the working position, the valve core operates in the third working state 19. Due to the internal connection relationship of the third section, ports A and C are connected, ports D and E are connected, and ports F and B are connected, achieving a series connection with the bed at the front.

[0067] In some embodiments, the system further includes a controller and a detection device, wherein the detection value of the detection device can be used to obtain the ratio of the desorption time to the adsorption time. The controller performs corresponding control based on the ratio of the desorption time to the adsorption time reflected in the detection value of the detection device.

[0068] It should be noted that there are three main methods for obtaining the data: one is to detect only the resolution time and compare it with the pre-stored adsorption time; another is to detect only the adsorption time and compare it with the pre-stored resolution time; and the third is to detect both the adsorption time and the resolution time simultaneously.

[0069] One method for detecting the desorption time is by determining the completion time, which 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 connecting valve between 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 time based on the temperature difference between the incoming and outgoing 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.

[0070] 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 has cooled 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.

[0071] Specifically, the detection values ​​of the testing equipment can include some or all of the following: the temperature of the heating fluid supply port, the flow rate of the heating fluid supply port, the temperature of the refrigeration fluid channel return port, and the flow rate of the refrigeration fluid channel return port.

[0072] Specifically, by obtaining the temperature and / or flow rate of the heating fluid supply port, the heat efficiency released by the heating fluid in the adsorption bed 1 can be determined. Generally speaking, the higher the temperature and / or the greater the flow rate, the greater the heat released per unit time, and the shorter the desorption time; while the lower the temperature and / or the smaller the flow rate, the longer the desorption time.

[0073] Obtaining the temperature and / or flow rate of the refrigerated fluid (the fluid entering the refrigerated fluid channel) can determine the efficiency of the heat released by the refrigerated fluid in the evaporation chamber. Generally, the higher the temperature and / or the greater the flow rate, the greater the heat released per unit time, resulting in more gaseous adsorbent material generated per unit time and a shorter adsorption time. Conversely, the lower the temperature and / or the smaller the flow rate, the less heat released per unit time, resulting in less gaseous adsorbent material generated per unit time and a longer adsorption time.

[0074] In some embodiments, for ease of control, the controller can switch the valve device 11 from the current first operating state 17 to the second operating state 18, or from the current second operating state 18 to the third operating state 19, when the detection value of the detection device is at the first threshold.

[0075] When the detection value of the detection device is at the second threshold, the controller switches the control valve device 11 from the current third working state 19 to the second working state 18, or from the current second working state 18 to the first working state 17.

[0076] When the detection value of the detection device is at the first threshold, the ratio of the current analysis time to the adsorption time is greater than the preset ratio of the analysis time to the adsorption time; when the detection value of the detection device is at the second threshold, the ratio of the current analysis time to the adsorption time is smaller than the preset ratio of the analysis time to the adsorption time.

[0077] When an adsorption refrigeration system is in operation, the adsorbent content of adsorption bed 1 or other parameters affecting the desorption and adsorption times are designed based on parameters such as the flow rate and temperature of the heating and cooling fluids that are available during actual installation. This allows for the design of a better ratio of desorption time to adsorption time under efficient operation. Generally, for the dual-bed adsorption refrigeration system shown in the attached diagram, the preset ratio of desorption time to adsorption time is usually 1:1, so that adsorption and desorption are carried out alternately and in staggered manner.

[0078] When the detection value of the detection device is at the first threshold, the ratio of the current analysis time to the adsorption time is greater than the preset ratio of analysis time to adsorption time. At this time, if the valve device 11 is working in the first working state 17, it will switch to the second working state 18 and work for a predetermined time, or if the valve device 11 is working in the second working state 18, it will switch to the third working state 19 and work for a predetermined time. Generally, after switching, the ratio of analysis time to adsorption time should be reduced for correction.

[0079] When the detection value of the detection device is at the second threshold, the ratio of the current analysis time to the adsorption time is smaller than the preset ratio of analysis time to adsorption time. At this time, if the valve device 11 is working in the third working state 19, it will switch to the second working state 18 and work for a predetermined time. Or if the valve device 11 is working in the second working state 18, it will switch to the first working state 17 and work for a predetermined time. Generally, after switching, the ratio of analysis time to adsorption time will decrease for correction.

[0080] In some embodiments, when a controller is provided, when the temperature of the cooling fluid supply interface 4 is within a first preset temperature range, the controller controls the valve device 11 to operate in a first operating state 17; when the temperature of the cooling fluid supply interface 4 is within a second preset temperature range, the controller controls the valve device 11 to operate in a second operating state 18; when the temperature of the cooling fluid supply interface 4 is within a third preset temperature range, the controller controls the valve device 11 to operate in a third operating state 19; the temperature gradually increases in the first preset temperature range, the second preset temperature range, and the third preset temperature range.

[0081] When the cooling fluid is within the first preset temperature range, indicating that the temperature is too low, the control valve device 11 operates in the first working state 17, so that the cooling fluid first passes through the condenser 7 and then enters the adsorption bed 1, thus preventing the temperature of the cooling fluid entering the adsorption bed 1 from being too low. At this time, the small temperature adjustment of the condenser 7 will not produce excessive changes, and can ensure the stable operation of the adsorption bed 1.

[0082] When the cooling fluid is within the second preset temperature range, it means that the temperature is just right. At this time, the control valve device 11 operates in the second working state 18, so that part of the cooling fluid directly enters the condenser 7 and the other part directly enters the adsorption bed 1.

[0083] When the cooling fluid is within the third preset temperature range, it indicates that the temperature is too high. At this time, the control valve device 11 operates in the third operating state 19, so that the cooling fluid first passes through the adsorption bed 1 and then enters the condenser 7, in order to avoid the cooling fluid temperature entering the adsorption bed 1 being too high. At this time, the small temperature adjustment of the condenser 7 will not produce too large a change, and can ensure the stable operation of the adsorption bed 1.

[0084] The above switching method is particularly suitable for scenarios where the temperature difference between the cooling fluid and the heating fluid is greater than the temperature difference between the cooling fluid and the chilled fluid return temperature, and the former is significantly greater than the latter. For example, if the heating fluid is around 50 degrees Celsius, the cooling fluid is around 30 degrees Celsius, and the chilled water return temperature is around 20 degrees Celsius, then the temperature difference between the cooling fluid and the heating fluid is about 20 degrees Celsius, while the temperature difference between the cooling fluid and the chilled fluid return temperature is about 10 degrees Celsius.

[0085] As the temperature gradually increases in the first preset temperature range, the second preset temperature range, and the third preset temperature range, the maximum value of the first preset temperature range is less than the minimum value of the second preset temperature range, and the maximum value of the second preset temperature range is less than the minimum value of the third preset temperature range.

[0086] In some embodiments, a temperature detector for detecting the cooling fluid supply interface 4 is also included, so that the controller can acquire the temperature detector in real time, thereby facilitating real-time control.

[0087] In some embodiments, it should also be noted that when the valve device 11 is operating in the second operating state 18, i.e., the cooling channel 16 and the heat exchange channel 3 are connected in parallel, the fluid flow rate entering from the cooling fluid supply interface 4 can be evenly distributed, or it can be preferentially distributed as needed, such as the flow rate entering the heat exchange channel 3 being less than the flow rate entering the cooling channel 16. Specifically, it can be set as needed.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] Specifically, in application, the supply port of the cold tower is connected to the cooling fluid supply interface 4 of the adsorption refrigeration system, while the cooling fluid discharge interface 6 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.

[0092] Specifically, the cooling tower can be a water-cooled cooling tower, a wet-dry cooling tower, or a dry cooling tower.

[0093] Based on the adsorption refrigeration system provided in the above embodiments, the present invention also provides a control method applied to the refrigeration system of the system, comprising: controlling the valve device 11 to switch between different operating states according to preset conditions. Since this control method can also achieve the switching control of the operating state of the valve device 11, the beneficial effects of this control method are explained in the above embodiments. Furthermore, the embodiments and beneficial effects of the switching conditions of the operating state of the valve device 11 are also explained in the above embodiments.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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 in that, The device includes an adsorption bed (1), a condenser (7), a cooling fluid supply port (4), and a cooling fluid discharge port (6). The condenser (7) has a condensation chamber for receiving the gaseous adsorbent discharged from the adsorption chamber of the adsorption bed (1). The condenser (7) has a cooling channel (16) that can exchange heat with the gaseous adsorbent in the condensation chamber. The adsorption bed (1) has a heat exchange channel (3) that exchanges heat with the adsorbent in the adsorption chamber. The device also includes a valve device (11). When the valve device (11) is working in the first working state (17), the cooling fluid supply port (4), the cooling channel (16), the heat exchange channel (3), and the cooling fluid discharge port (6) are connected in series. When the valve device (11) is working in the second working state (18), the heat exchange channel (3) and the cooling channel (16) are connected in parallel and connected in series between the cooling fluid supply port (4) and the cooling fluid discharge port (6).

2. The adsorption refrigeration system according to claim 1, characterized in that, When the valve device (11) is operating in the third operating state (19), the cooling fluid supply port (4), the heat exchange channel (3), the cooling channel (16) and the cooling fluid discharge port (6) are connected in series.

3. The adsorption refrigeration system according to claim 2, characterized in that, It also includes an evaporator (8), whose evaporation chamber is optionally connected to the adsorption chambers of different adsorption beds (1) in the plurality of adsorption beds (1) through a first valve group (9), and the evaporator (8) is also provided with a refrigeration fluid channel 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).

4. The adsorption refrigeration system according to claim 3, characterized in that, It also includes a first heating fluid interface (2) and a second heating fluid interface (5); The first end of each heat exchange channel (3) is optionally connected to the first heating fluid interface (2) via a 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 a second multi-way valve (13) so that heating fluid can be optionally introduced. The first end of each heat exchange channel (3) is optionally connected to the corresponding interface of the valve device (11) via a third multi-way valve (14), and the second end of each heat exchange channel (3) is optionally connected to the corresponding interface of the valve device (11) via a fourth multi-way valve (15) so that cooling fluid can be optionally introduced.

5. The adsorption refrigeration system according to claim 4, characterized in that, The valve device (11) is a three-position six-way directional valve. The three working positions of the three-position six-way directional valve correspond to the first working state (17), the second working state (18), and the third working state (19), respectively. The six ports of the three-position six-way directional valve are respectively connected to the cooling fluid supply port (4), the cooling fluid discharge port (6), the inlet end of the cooling channel (16), the outlet end of the cooling channel (16), the inlet end of the third multi-way valve (14), and the outlet end of the fourth multi-way valve (15).

6. The adsorption refrigeration system according to any one of claims 2-5, characterized in that, It also includes a controller and a detection device, wherein the detection value of the detection device is used to obtain the ratio of the analysis time and the adsorption time; when the detection value of the detection device is at a first threshold, the controller controls the valve device (11) to switch from the current first working state (17) to the second working state (18), or from the current second working state (18) to the third working state (19). When the detection value of the detection device is at the second threshold, the controller controls the valve device (11) to switch from the current third working state (19) to the second working state (18), or from the current second working state (18) to the first working state (17). When the detection value of the detection device is at the first threshold, the ratio of the current parsing time to the adsorption time is greater than the preset ratio of the parsing time to the adsorption time; when the detection value of the detection device is at the second threshold, the ratio of the current parsing time to the adsorption time is smaller than the preset ratio of the parsing time to the adsorption time.

7. The adsorption refrigeration system according to claim 6, characterized in that, The detection values ​​of the detection equipment include some or all of the following: the temperature of the heating fluid supply port, the flow rate of the heating fluid supply port, the temperature of the reflux port of the chilled fluid channel, and the flow rate of the reflux port of the chilled fluid channel.

8. The adsorption refrigeration system according to any one of claims 2-5, characterized in that, It also includes a controller, which controls the valve device (11) to operate in the first working state (17) when the temperature of the cooling fluid supply interface (4) is within a first preset temperature range; the controller controls the valve device (11) to operate in the second working state (18) when the temperature of the cooling fluid supply interface (4) is within a second preset temperature range; the controller controls the valve device (11) to operate in the third working state (19) when the temperature of the cooling fluid supply interface (4) is within a third preset temperature range; the temperature in the first preset temperature range, the second preset temperature range, and the third preset temperature range gradually increases.

9. The adsorption refrigeration system according to claim 8, characterized in that, It also includes a temperature detector for detecting the cooling fluid supply interface (4).

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 fluid 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 1 to 9, comprising: According to preset conditions, the valve device (11) is controlled to switch between different working states.

12. The adsorption refrigeration control method according to claim 11, characterized in that, The step of controlling the valve device (11) to switch between different working states according to preset conditions includes: When it is determined that the ratio of the current desorption time to the adsorption time is greater than the preset ratio of the desorption time to the adsorption time, the valve device (11) is controlled to switch from the current first working state (17) to the second working state (18), or from the current second working state (18) to the third working state (19). When it is determined that the ratio of the current desorption time to the adsorption time is less than the preset ratio of the desorption time to the adsorption time, the valve device (11) is controlled to switch from the current third working state (19) to the second working state (18), or from the current second working state (18) to the first working state (17). When the valve device (11) is operating in the third working state (19), the cooling fluid supply interface (4), the heat exchange channel (3), the cooling channel (16) and the cooling fluid discharge interface (6) are connected in series.

13. The adsorption refrigeration control method according to claim 11, characterized in that, The step of controlling the valve device (11) to switch between different working states according to preset conditions includes: When the temperature of the cooling fluid supply interface (4) is within the first preset temperature range, the valve device (11) is controlled to work in the first working state (17). When the temperature of the cooling fluid supply interface (4) is within the second preset temperature range, the valve device (11) is controlled to operate in the second working state (18). When the temperature of the cooling fluid supply interface (4) is within the third preset temperature range, the valve device (11) is controlled to operate in the third working state (19). Among them, the temperatures of the first preset temperature range, the second preset temperature range and the third preset temperature range gradually increase; when the valve device (11) is working in the third working state (19), the cooling fluid supply interface (4), the heat exchange channel (3), the cooling channel (16) and the cooling fluid discharge interface (6) are connected in series.

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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