Adsorption refrigeration system and server system

Abstract

An adsorption refrigeration system and a server system comprising the adsorption refrigeration system. The adsorption refrigeration system comprises: a cooling fluid supply channel (1), a heat source fluid supply channel (2), and at least three adsorption modules (3), wherein each adsorption modules (3) comprises an adsorption bed (3-1) and a control valve (3-2), the control valve (3-2) is capable of being in at least a first control state and a second control state, separately, so as to alternately introduce a cooling fluid and a heat source fluid into the adsorption bed (3-1) from the cooling fluid supply channel (1) and the heat source fluid supply channel (2), respectively, and the control valves (3-2) of the at least three adsorption modules (3) can be independently controlled; and an evaporator (4), wherein an evaporation cavity (4-4) of the evaporator (4) is used for being communicated with adsorption cavities (3-12) of the adsorption beds (3-1) when the cooling fluid is introduced into the adsorption beds (3-1), so as to supply a gaseous adsorption working fluid, and the evaporator (4) is further provided with a chilled fluid channel capable of exchanging heat with a liquid adsorption working fluid in the evaporation cavity (4-4).

Description

Adsorption refrigeration system and server system

[0001] This application claims priority to Chinese Patent Application No. CN202411998833.1, filed with the Chinese Patent Office on December 31, 2024, entitled "Adsorption Cooling System and Server System", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This invention relates to the field of equipment cooling technology, and more specifically, to an adsorption refrigeration system, and also to a server system including an adsorption refrigeration system. Background Technology

[0003] Adsorption refrigeration systems mainly consist of adsorption beds, condensers, and evaporators. To ensure continuous cooling, two adsorption beds are typically used, alternating between desorption and adsorption to maintain continuous adsorption. In this case, the desorption and adsorption times need to be equal. If the adsorption time is longer, desorption may complete before adsorption is finished, resulting in wasted heat and unusable heat. Conversely, if the adsorption time is shorter, adsorption may occur while waiting for desorption to complete, leading to a short period without cooling output.

[0004] In the process of realizing this invention, the inventors discovered that the prior art has at least the following problems: the adsorption refrigeration system has poor adaptability when the server system faces environmental changes that cause a significant change in the ratio of desorption time to adsorption time. Summary of the Invention

[0005] In view of this, the first objective of the present invention is to provide an adsorption refrigeration system that can effectively solve the problem of poor adaptability of adsorption refrigeration systems, and the second objective of the present invention is to provide a server system including an adsorption refrigeration system.

[0006] To achieve the first objective mentioned above, the present invention provides the following technical solution:

[0007] An adsorption refrigeration system, comprising:

[0008] Cooling fluid supply channel;

[0009] Heat source fluid supply channel;

[0010] At least three adsorption modules are provided, each of which includes an adsorption bed and a control valve. The control valve is capable of being in at least a first control state and a second control state, respectively, so as to enable the alternating introduction of cooling fluid and heat source fluid into the adsorption bed from the cooling fluid supply channel and the heat source fluid supply channel, respectively. The control valves of the at least three adsorption modules are independently controllable.

[0011] An evaporator, the evaporation chamber of which is connected to the adsorption chamber of the adsorption bed when a cooling fluid is introduced into the adsorption bed so as to supply a gaseous adsorbent, the evaporator is also provided with a refrigeration fluid channel that can exchange heat with the liquid adsorbent in the evaporation chamber.

[0012] In the aforementioned adsorption refrigeration system, during operation, some adsorption modules are in the desorption phase while others are in the adsorption phase. If the heat flux of the heat source fluid increases, the number of adsorption modules in the adsorption phase can be increased, while the number of adsorption modules in the desorption phase can be decreased. Because the number of adsorption modules in the adsorption phase increases, the evaporation rate of the evaporator increases, allowing for the production of more cooling capacity, such as producing lower-temperature chilled fluids or producing a larger quantity of chilled fluid. This adsorption refrigeration system incorporates at least three sets of adsorption modules, each independently controlled. This allows for adjustments to the adsorption and desorption time ratios based on changes in on-site parameters. The control valves of the adsorption modules can be used to adjust the number of adsorption beds in the current adsorption phase and the corresponding number in the desorption phase, thus better adapting to more complex application scenarios. Therefore, this adsorption refrigeration system effectively solves the problem of poor adaptability in traditional adsorption refrigeration systems.

[0013] Some technical solutions also include:

[0014] A cooling fluid discharge channel is provided for receiving the cooling fluid discharged from each of the adsorption modules.

[0015] The heat source fluid discharge channel is used to receive the heat source fluid discharged from each of the adsorption modules; the control valve is used to control the connection between the adsorption bed and the cooling fluid discharge channel and the heat source fluid discharge channel.

[0016] Some technical solutions include six, eight, or twelve adsorption modules; each adsorption module can be controlled independently.

[0017] In some technical solutions, a controller is also included, which controls the number of adsorption modules in the adsorption stage and the ratio of the number of adsorption modules entering the desorption stage based on the currently acquired ratio of adsorption time to desorption time.

[0018] In some technical solutions, the control valve includes an inlet three-way valve and an outlet three-way valve. One end of the heat exchange channel of the adsorption bed is connected to the total outlet of the inlet three-way valve, and the other end is connected to the total inlet of the outlet three-way valve. The first inlet of the inlet three-way valve is connected to the cooling fluid supply channel, and the second inlet is connected to the heat source fluid supply channel. The first outlet of the outlet three-way valve is connected to the cooling fluid discharge channel, and the second outlet is connected to the heat source fluid discharge channel. When the control valve is in a first control state, the first inlet is connected to the total outlet, and the first outlet is connected to the total inlet. When the control valve is in a second control state, the second inlet is connected to the total outlet, and the second outlet is connected to the total inlet.

[0019] In some technical solutions, a condenser is also included, wherein 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;

[0020] The condenser's condensing chamber is optionally connected to the adsorption chambers corresponding to different adsorption beds in the plurality of adsorption beds through a second valve group. The condenser is also provided with a cooling fluid channel for heat exchange with the gaseous adsorption working fluid in the condensing chamber.

[0021] In some technical solutions, the control valve includes a first switching valve, a second switching valve, a third switching valve, and a fourth switching valve; one end of the heat exchange channel of the adsorption bed is connected to the cooling fluid supply channel through the first switching valve and to the heat source fluid supply channel through the second switching valve; the other end of the heat exchange channel of the adsorption bed is connected to the cooling fluid discharge channel through the third switching valve and to the heat source fluid discharge channel through the fourth switching valve.

[0022] In some technical solutions, a chilled fluid supply channel and a chilled fluid discharge channel are also included. The evaporator includes multiple evaporation units, each of which includes an evaporation chamber unit and a chilled fluid channel unit. Each chilled fluid channel unit is connected at both ends to the chilled fluid supply channel and the chilled fluid discharge channel, respectively. At least three sets of independently controllable adsorption modules correspond one-to-one with the corresponding number of evaporation units.

[0023] In some technical solutions, each refrigerant channel unit is connected to the refrigerant supply channel and / or the refrigerant discharge channel via a switching valve.

[0024] To achieve the second objective mentioned above, the present invention also provides a server system comprising any of the aforementioned adsorption refrigeration systems, further comprising a service heat source device and a natural cooling device. The heat exchange channel outlet of the service heat source device is connected to the heat source fluid supply channel of the adsorption refrigeration system, and the cooling water outlet of the natural cooling device is connected to the cooling fluid supply channel of the adsorption refrigeration system. Since the aforementioned adsorption refrigeration system possesses the aforementioned technical effects, the server system having this adsorption refrigeration system should also possess the corresponding technical effects. Attached Figure Description

[0025] 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.

[0026] Figure 1 is a schematic diagram of the adsorption refrigeration system provided in an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of another adsorption refrigeration system provided in an embodiment of the present invention.

[0028] The following are labeled in the attached diagram: Cooling fluid supply channel 1, heat source fluid supply channel 2, adsorption module 3, evaporator 4, cooling fluid discharge channel 5, heat source fluid discharge channel 6, chilled fluid supply channel 7, chilled fluid discharge channel 8, first valve group 9, second valve group 10, return channel 11; adsorption bed 3-1, control valve 3-2; heat exchange channel 3-11, adsorption chamber 3-12, liquid inlet three-way valve 3-21, liquid outlet three-way valve 3-22; chilled fluid channel 4-1, evaporation chamber unit 4-2, chilled fluid channel unit 4-3, evaporation chamber 4-4. Detailed Implementation

[0029] This invention discloses an adsorption refrigeration system that can effectively solve the problem of poor adaptability of adsorption refrigeration systems.

[0030] 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.

[0031] Please refer to Figures 1 and 2. Figure 1 is a schematic diagram of the structure of the adsorption refrigeration system provided in an embodiment of the present invention; Figure 2 is a schematic diagram of the structure of another adsorption refrigeration system provided in an embodiment of the present invention.

[0032] In some embodiments, an adsorption refrigeration system is provided. Specifically, the adsorption refrigeration system mainly includes a cooling fluid supply channel 1, a heat source fluid supply channel 2, and multiple adsorption modules 3.

[0033] The adsorption module 3 mainly includes an adsorption bed 3-1 and a control valve 3-2. The control valve 3-2 is used to control whether the adsorption bed 3-1 is introduced with cooling fluid from the cooling fluid channel or from the heat source fluid supply channel 2.

[0034] The adsorption chamber 3-12 of the adsorption bed 3-1 is equipped with an adsorbent. The working fluid used in conjunction with the adsorbent can flow through the adsorption chamber 3-12 and the condensation chamber of the condenser, as well as through the evaporator 4. The working fluid and the adsorbent combine to form a working fluid pair. In an adsorption refrigeration system, multiple working fluid pairs can be set up. One adsorbent can be used for different types of working fluids, or multiple adsorbents can be used for one type of working fluid.

[0035] For adsorption bed 3-1, there are two main working states: adsorption and desorption, which are generally carried out in stages. In the adsorption state, cooling fluid is used to cool adsorption bed 3-1, allowing the adsorbent within 3-1 to adsorb the gaseous working medium, ensuring continuous adsorption capacity in adsorption chamber 3-12 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 adsorption chamber 3-12. This allows for continuous external suction of the gaseous working medium, such as continuously adsorbing the gaseous working medium from bed evaporator 4, enabling continuous evaporation and heat absorption in bed evaporator 4. Alternatively, adsorption bed 3-1 can also obtain the gaseous working medium from an external source, rather than from bed evaporator 4. In the desorption state, a heat source fluid is typically used to heat the adsorption bed by 3-1, causing the adsorbent in the adsorbent to desorb from the adsorbent and re-form into a gaseous adsorbent. This gaseous adsorbent then enters the condenser, where it liquefies into a liquid state. Alternatively, the adsorbent can be discharged to the outside. The temperature of the heat source fluid is generally significantly higher than the temperature of the cooling fluid.

[0036] The adsorption bed 3-1 has a heat exchange channel 3-11 for exchanging heat with the adsorbent in the adsorption chamber 3-12. Here, the heat exchange channel 3-11 refers to the channel for the flow of heat source fluid and / or cooling fluid. It should be noted that the adsorption bed 3-1 can be provided with one heat exchange channel 3-11 as shown in the attached figure, so that heat source fluid and cooling fluid can flow alternately; or it can be that heat exchange channel 3-11 is provided specifically for the flow of cooling fluid, while another channel is provided specifically for the flow of heat source fluid.

[0037] The control valve 3-2 can be in at least a first control state and a second control state, respectively, to alternately introduce cooling fluid and heat source fluid into the adsorption bed 3-1 from the cooling fluid supply channel 1 and the heat source fluid supply channel 2, respectively. When the control valve 3-2 is in the first control state, cooling fluid is introduced into the adsorption bed 3-1 to absorb heat from the adsorbent through the heat exchange channel 3-11. No heat source fluid is introduced at this time, so that the adsorption bed 3-1 is in the adsorption stage. When the control valve 3-2 is in the second control state, heat source fluid is introduced into the adsorption bed 3-1 to release heat to the adsorbent through the heat exchange channel 3-11. No cooling fluid is introduced at this time, so that the adsorption bed 3-1 is in the desorption stage. The control valve 3-2 may include two switching valves, such as a first switching valve and a second switching valve, wherein the first switching valve is located between the heat exchange channel 3-11 and the cooling fluid supply channel 1, and the second switching valve is located between the heat exchange channel 3-11 and the heat source fluid supply channel 2. In the first control state, the first switching valve is open and the second switching valve is closed, so that cooling fluid is introduced into the heat exchange channel 3-11; in the second control state, the first switching valve is closed and the second switching valve is open, so that heat source fluid is introduced into the heat exchange channel 3-11.

[0038] At least three sets of control valves 3-2 of the adsorption modules 3 can be independently controlled. The control states of the control valves 3-2 of each adsorption module 3 are independent and do not interfere with each other. This allows for selection of whether two control valves 3-2 enter a first control state or a second control state. This enables individual control of the operating state of each adsorption bed 3-1 as needed.

[0039] The evaporation chamber 4-4 of the evaporator 4 is used to supply gaseous adsorbent to the adsorption chamber 3-12 of the adsorption bed 3-1 when cooling fluid is introduced into the adsorption bed 3-1, in order to cooperate with the adsorption stage of the adsorption bed 3-1. The evaporator 4 is also provided with a chilled fluid channel 4-1 that can exchange heat with the liquid adsorbent in the evaporation chamber 4-4. Of course, the chilled fluid channel 4-1 can directly penetrate into the evaporation chamber 4-4 to exchange heat directly through the pipe wall. Alternatively, heat exchange can be carried out using a heat exchange system. In use, the chilled fluid introduced into the chilled fluid channel 4-1 can transfer heat to the liquid adsorbent in the evaporation chamber 4-4. The liquid adsorbent evaporates into gaseous adsorbent, carrying away the heat. The gaseous adsorbent enters the adsorption chamber 3-12, releases heat in the adsorption chamber 3-12, and is absorbed by the adsorbent in the adsorption chamber 3-12. The released heat is absorbed and transferred out through a heat transfer conductor or fluid.

[0040] When adsorption bed 3-1 is in the adsorption stage, cooling fluid is introduced into adsorption bed 3-1. At this time, the evaporation chamber 4-4 and adsorption chamber 3-12 of evaporator 4 are connected. The gaseous adsorbent in evaporator 4 enters the adsorption chamber 3-12, so that the adsorbent in adsorption chamber 3-12 can complete the adsorption of the adsorbent. As the gaseous adsorbent in evaporation chamber 4-4 enters adsorption chamber 3-12, the liquid adsorbent in evaporation chamber 4-4 will continue to evaporate. During the continuous evaporation process, heat is absorbed, which is then absorbed by the refrigeration fluid through the refrigeration fluid channel 4-1, thereby cooling the refrigeration fluid. Once adsorption bed 3-1 has completed adsorption, evaporator 4 no longer supplies gaseous adsorbent to adsorption chamber 3-12. This can be done by shutting off the supply through a valve or by discharging the liquid adsorbent from evaporation chamber 4-4. At this point, the heat source fluid is introduced into the heat exchange channel 3-11 through control valve 3-2 to heat the adsorbent. The adsorbent then desorbs the working fluid. After desorption, the adsorption stage can resume for adsorption-cooling. The desorbed gaseous working fluid can be discharged to the outside or enter the corresponding condenser. It should be noted that when each adsorption bed 3-1 is equipped with its own heat exchanger, the heat exchanger can be used alternately as both a condenser and an evaporator 4.

[0041] As described above, the control valves 3-2 of at least three adsorption modules 3 can be controlled independently, meaning that the corresponding adsorption module 3 can be individually controlled to enter either the desorption stage or the adsorption stage. Taking three adsorption modules 3 as an example, if in the current working state, two adsorption modules 3 are in the adsorption stage, while one adsorption module 3 is in the desorption stage, and the adsorption time of one adsorption module 3 is 20 minutes, while the desorption time of one adsorption module 3 is 10 minutes, then in each stage, two adsorption beds 3-1 are performing adsorption, while the other adsorption bed 3-1 is performing desorption. If the temperature and flow rate of the heat source fluid, the flow rate or temperature of the chilled water, or the temperature and flow rate of the cooling water change, causing the desorption time of one adsorption module 3 to be 20 minutes and the adsorption time of one adsorption module 3 to be 10 minutes, then in each stage, two adsorption beds 3-1 are performing desorption, while the other adsorption bed 3-1 is performing desorption. The latter change is due to the reduced heat from the heat source, which leads to a longer desorption time. Furthermore, the decrease in cooling power results in an excessively high return water temperature, causing the evaporation power of evaporator 4 to increase, which in turn leads to an increase in the desorption power of adsorption bed 3-1.

[0042] To better understand, consider a scenario with twelve adsorption modules 3. If eight modules are currently adsorbing and four are desorbing, the desorption time for adsorption bed 3-1 is, for example, 15 minutes, while the adsorption time is 30 minutes. However, as the heat source temperature increases, nine modules may be adsorbing and three desorbing, reducing the desorption time to 10 minutes, while the adsorption time remains 30 minutes. It's important to note that if the flow rate of the heat source fluid supply channel 2 remains constant, the change in desorption time from 15 minutes to 10 minutes is not solely due to temperature changes but also to the increased flow rate per unit time—a combination of increased flow rate and increased temperature. Conversely, if the flow rate of the heat source fluid supply channel 2 can change due to factors like a heat storage tank, while the flow rate of a single adsorption bed 3-1 remains constant, the change in desorption time from 15 minutes to 10 minutes may be solely due to temperature variations. The same adsorption time is maintained at 30 minutes. The cooling capacity may increase due to a proportional increase in the flow rate of the refrigerated fluid channel 4-1, for example, if the previous flow rate was 80 cm³. 3 / s (80 cubic centimeters per second), then the current flow rate could be 90cm 3 / s (90 cubic centimeters per second), at this point more chilled water can be produced. Alternatively, the chilled water flow rate in the chilled fluid channel 4-1 can remain unchanged, but because more adsorption beds 3-1 are in the adsorption stage, the evaporation rate in the evaporator 4 will increase, causing the outlet temperature of the chilled fluid channel 4-1 to decrease. In this case, chilled water at a lower temperature can be produced, but the adsorption time may be slightly extended, such as to 32 minutes. In this case, the overall effect will not be significantly affected.

[0043] It should be noted that the adsorption and desorption times listed in the context are for the purpose of illustrating the changes in refrigeration power, and are not intended to limit the adsorption and desorption times. The adsorption and desorption times are related to the characteristics of the adsorption bed 3-1 itself, as well as the heat flux of the heat source fluid, the cooling fluid, and the refrigeration fluid. Therefore, the adsorption and desorption times cannot be precisely determined, generally ranging from a few minutes to tens of minutes, such as greater than 1 minute but less than 100 minutes, and can also exceed these ranges. The desorption and adsorption times can be determined by calculating the influencing factors mentioned above, such as how much the desorption time will shorten by a certain increase in the heat source fluid temperature while other conditions remain unchanged. Alternatively, they can be determined by measuring or detecting relevant parameters of the adsorption bed 3-1, such as its weight, the inlet and outlet flow rates of the adsorbent, the inlet and outlet temperatures of the cooling fluid, and the inlet and outlet temperatures of the heat source fluid. In short, the optimal pairing of adsorption and desorption times with the number of adsorption and desorption stages in the adsorption bed 3-1 during that operating stage is always achieved.

[0044] In the aforementioned adsorption refrigeration system, during operation, some adsorption modules 3 are in the desorption stage, while others are in the adsorption stage. If the heat flux of the heat source fluid increases, the number of adsorption modules 3 in the adsorption stage can be increased, while the number of adsorption modules 3 in the desorption stage can be decreased. Because the number of adsorption modules 3 in the adsorption stage increases, the evaporation capacity of the evaporator 4 increases, allowing for the production of more cooling capacity, such as producing a lower-temperature cryogenic fluid or producing a larger quantity of cryogenic fluid. The adsorption refrigeration system incorporates at least three sets of adsorption modules 3, each independently controlled. This allows for adjustments to the adsorption and desorption time ratios based on changes in on-site parameters. The number of adsorption beds 3-1 in the current adsorption stage and the number of adsorption beds 3-1 in the desorption stage can be adjusted via the control valve 3-2 of the adsorption modules 3, thus better adapting to more complex application scenarios.

[0045] In some embodiments, the cooling fluid and heat source fluid discharged from the adsorption module 3 can be either discharged and discarded or recycled for reuse. Accordingly, it is preferable to further include: a cooling fluid discharge channel 5 for receiving the cooling fluid discharged from each of the adsorption modules 3; and a heat source fluid discharge channel 6 for receiving the heat source fluid discharged from each of the adsorption modules 3. Control valve 3-2 is used to control the communication between the adsorption bed 3-1 and the cooling fluid discharge channel 5 and the heat source fluid discharge channel 6. This ensures that when the adsorption bed 3-1 discharges cooling fluid, the cooling fluid is discharged into the cooling fluid discharge channel 5, and when the adsorption bed 3-1 discharges heat source fluid, the heat source fluid is discharged into the heat source fluid discharge channel 6. In the illustration, the cooling fluid and heat source fluid flow in the same direction within the heat exchange channel. In other embodiments, the flow directions of the cooling fluid and heat source fluid within the heat exchange channel can also be adjusted to be opposite.

[0046] Specifically, control valve 3-2 may also include a third switching valve and a fourth switching valve. The third switching valve is located between heat exchange channel 3-11 and cooling fluid discharge channel 5, while the fourth switching valve is located between heat exchange channel 3-11 and heat source fluid discharge channel 6. In the first control state, the first and third switching valves are open, while the second and fourth switching valves are closed, allowing cooling fluid to enter heat exchange channel 3-11. In the second control state, the first and third switching valves are closed, while the second and fourth switching valves are open, allowing heat source fluid to enter heat exchange channel 3-11. During the initial switching phase, if the cooling fluid and heat source fluid share heat exchange channel 3-11, the switching of the four switching valves can be done in a specific order, and simultaneous switching is not required.

[0047] In some embodiments, generally speaking, the more adsorption modules 3 there are, the larger the adjustable range and the better the adaptability, but the higher the cost. However, the fewer the adsorption modules 3 there are, the smaller the adjustable range and the lower the cost. Based on this, it is preferable to include six, eight, or twelve adsorption modules 3, and the control valves 3-2 of each adsorption module 3 can be controlled independently.

[0048] In some embodiments, a controller may also be provided, wherein the controller can control the ratio of the number of adsorption modules 3 in the adsorption stage to the number of adsorption modules 3 entering the desorption stage according to the currently acquired ratio of adsorption time and desorption time, so that the latter ratio is closest to the former ratio.

[0049] In some embodiments, for ease of setup, the control valve 3-2 preferably includes an inlet three-way valve 3-21 and an outlet three-way valve 3-22. One end of the heat exchange channel 3-11 of the adsorption bed 3-1 is connected to the total outlet of the inlet three-way valve 3-21, and the other end is connected to the total inlet of the outlet three-way valve 3-22. In this case, the heat exchange channel 3-11 actually alternately introduces the heat source fluid and the cooling fluid, so that the heat source fluid and the cooling fluid share the same heat exchange channel 3-11.

[0050] Correspondingly, the first inlet of the liquid inlet three-way valve 3-21 can be connected to the cooling fluid supply channel 1, and the second inlet can be connected to the heat source fluid supply channel 2. The total outlet of the liquid inlet three-way valve 3-21 can be optionally connected to the first inlet and the second inlet. The first outlet of the liquid outlet three-way valve 3-22 is connected to the cooling fluid discharge channel 5, and the second outlet is connected to the heat source fluid discharge channel 6. The total inlet of the liquid outlet three-way valve 3-22 can be optionally connected to the first outlet and the second outlet. When the control valve 3-2 is in the first control state, the first inlet is connected to the total outlet, and the first outlet is connected to the total inlet, to introduce heat source fluid from the heat source fluid supply channel 2 and to discharge the heat-exposed heat source fluid to the heat source fluid discharge channel 6. When the control valve 3-2 is in the second control state, the second inlet can be connected to the total outlet, and the second outlet can be connected to the total inlet, to introduce cooling fluid from the cooling fluid supply channel 1 and to discharge the heat-absorbed cooling fluid to the cooling fluid discharge channel 5.

[0051] By using inlet three-way valve 3-21 and outlet three-way valve 3-22, the number of valves required in the valve assembly can be greatly reduced, facilitating control. When switching, outlet three-way valve 3-22 generally lags behind inlet three-way valve 3-21 by a certain time. For example, when inlet three-way valve 3-21 switches to the heat source fluid, cooling fluid still exists in adsorption heat exchange channel 3-11. In this case, wait until the cooling fluid is completely or mostly discharged before switching outlet three-way valve 3-22 to connect to heat source fluid outlet channel 6; the reverse is also true.

[0052] In some embodiments, as described above, the control valve 3-2 may include a first switching valve, a second switching valve, a third switching valve, and a fourth switching valve. One end of the heat exchange channel 3-11 of the adsorption bed 3-1 is connected to the cooling fluid supply channel 1 via the first switching valve and to the heat source fluid supply channel 2 via the second switching valve; the other end of the heat exchange channel 3-11 of the adsorption bed 3-1 is connected to the cooling fluid discharge channel 5 via the third switching valve and to the heat source fluid discharge channel 6 via the fourth switching valve. That is, as described above in the first control state, the first and third switching valves are open, while the second and fourth switching valves are closed, allowing cooling fluid to be introduced into the heat exchange channel 3-11, and the adsorption bed 3-1 enters the adsorption stage. In the second control state, the first and third switching valves are closed, while the second and fourth switching valves are open, allowing heat source fluid to be introduced into the heat exchange channel 3-11, and the adsorption bed 3-1 enters the desorption stage.

[0053] In some embodiments, as described above, when a condenser is provided, the evaporation chamber 4-4 of the evaporator 4 can be optionally connected to the adsorption chamber 3-12 corresponding to different adsorption beds 3-1 among the plurality of adsorption beds 3-1 through the first valve group 9. The evaporator 4 is also provided with a refrigeration fluid channel 4-1 for exchanging heat with the liquid adsorption working fluid in the evaporation chamber 4-4. The condensation chamber of the condenser is optionally connected to the adsorption chamber 3-12 corresponding to different adsorption beds 3-1 among the plurality of adsorption beds 3-1 through the second valve group 10. The condenser is also provided with a cooling fluid channel for exchanging heat with the gaseous adsorption working fluid in the condensation chamber.

[0054] For a specific adsorption bed 3-1, when entering the adsorption stage, it needs to be connected to the evaporation chamber 4-4 through the first valve group 9, and disconnected from the condensation chamber through the second valve group 10; when entering the desorption stage, it needs to be disconnected from the evaporation chamber 4-4 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 switching valves. Of course, the first valve group 9 and the second valve group 10 can be combined into a single reversing valve.

[0055] The condenser's condensing chamber receives the gaseous adsorbent discharged from adsorption chamber 3-12 of adsorption bed 3-1. When the heat source fluid enters adsorption bed 3-1, it desorbs the gaseous adsorbent, which then enters the condensing chamber and releases heat. This heat is released into the cooling channel of the bed condenser and carried out by the fluid in the cooling channel. After releasing heat, the gaseous adsorbent forms a liquid adsorbent, which continues to receive the gaseous adsorbent discharged from adsorption chamber 3-12.

[0056] In some embodiments, the evaporator 4 may include only one evaporation chamber 4-4, which is connected to each of the adsorption beds 3-1 through the respective valve ports of the first valve group 9.

[0057] In some embodiments, to better control the adsorption time of the adsorption bed 3-1 and avoid the adsorption time being affected by changes in the working efficiency of the evaporator 4, the cooling capacity can be changed by adjusting the number of evaporation chambers 4-4 involved in the operation when the desorption time changes. Therefore, as shown in Figure 2, the evaporator 4 can include multiple evaporation units, each including an evaporation chamber unit 4-2 and a chilled fluid channel unit 4-3, with corresponding chilled fluid supply channels 7 and chilled fluid discharge channels 8. Each chilled fluid channel unit 4-3 is connected at both ends to the chilled fluid supply channel 7 and the chilled fluid discharge channel 8, respectively, to introduce chilled fluid from the chilled fluid supply channel 7, perform heat exchange at the corresponding evaporation chamber unit 4-2, and then discharge from the chilled fluid discharge channel 8. The discharged chilled fluid is the prepared chilled fluid.

[0058] At least three independently controllable adsorption modules 3 correspond one-to-one with the corresponding number of evaporation units. That is, for each independently controllable adsorption module 3, there are at least three sets of adsorption modules 3, each corresponding to an evaporation unit. Specifically, if each set of independently controllable adsorption modules 3 corresponds to one evaporation unit, then when an adsorption module 3 is in the adsorption stage, the corresponding evaporation unit can produce cryogenic fluid, while when an adsorption module 3 is in the desorption stage, its corresponding evaporation unit does not produce cryogenic fluid. In this case, by setting evaporation units separately for each adsorption module 3, the flow rate of cryogenic fluid supplied to each evaporation unit is stable, the volume of the evaporation chamber 4-4 is stable, and the adsorption time of the corresponding adsorption module 3 is relatively stable. At this time, heat source fluctuations can be monitored independently to obtain the corresponding desorption time. Then, the ratio of the number of adsorption modules 3 in the desorption stage to the number of adsorption modules 3 in the adsorption stage can be adjusted according to the desorption time. Since the latter ratio is a countable point value, the nearest ratio value can be found based on the desorption time to improve adaptability.

[0059] In some embodiments, for evaporation units that do not enter the evaporation stage, chilled fluid can still be introduced, and the inlet and outlet temperatures of the chilled fluid will not change. When the number of adsorption modules 3 in the adsorption stage increases, more corresponding evaporation units prepare chilled fluid. Therefore, compared to before, because more mixed low-temperature chilled fluid is produced, the fluid temperature at the chilled fluid discharge channel 8 is lower, while the flow rate of chilled fluid from the system remains unchanged. However, in most cases, there is no requirement for the outlet flow rate of the chilled fluid discharge channel 8, but the lower the outlet temperature of the chilled fluid discharge channel 8, the better. Based on this, it is preferable that each cryogenic fluid channel unit 4-3 is connected to the cryogenic fluid supply channel 7 and / or the cryogenic fluid discharge channel 8 respectively via a switching valve. The inlet of each cryogenic fluid channel unit 4-3 can be connected to the cryogenic fluid supply channel 7 via a switching valve, or the outlet of each cryogenic fluid channel unit 4-3 can be connected to the cryogenic fluid discharge channel 8 via a switching valve; alternatively, both the inlet and outlet of each cryogenic fluid channel unit 4-3 can be equipped with switching valves to connect to the cryogenic fluid supply channel 7 and the cryogenic fluid discharge channel 8 respectively, as shown in Figure 2. Each cryogenic fluid channel unit 4-3 is connected to the cryogenic fluid supply channel 7 via a switching valve. During the adsorption stage of the corresponding adsorption module 3, the corresponding switching valve opens to introduce cryogenic fluid, and when the corresponding adsorption module 3 enters the desorption stage, the corresponding switching valve closes to stop the flow of cryogenic fluid. This results in the lowest temperature in the cryogenic fluid discharge channel 8, but with a corresponding decrease in flow rate. During fluid supply, if more valves are closed, the flow rates in the chilled fluid discharge channel 8 and the chilled fluid supply channel 7 will decrease accordingly. The flow rate can be changed by adjusting the pump speed or power of the drive pump, thereby altering the flow rate. This change in flow rate is precisely adapted to the number of evaporation units in operation, ensuring stable flow rates in the chilled fluid channel units 4-3 of each evaporation unit. This, in turn, allows the corresponding adsorption module 3 to have a stable adsorption time. When the number of adsorption modules 3 entering the adsorption stage simultaneously increases, the total flow rate in the chilled fluid discharge channel 8 increases, while the temperature remains constant, thus obtaining more cooling capacity.

[0060] At this time, the condenser's condensing chamber can be connected to each evaporation chamber unit 4-2 through each corresponding return channel 11, so that liquid adsorbent can be supplied to each evaporation chamber unit 4-2 respectively.

[0061] Based on the adsorption refrigeration system provided in the above embodiments, the present invention also provides a server system. This server system includes any one of the adsorption refrigeration systems described in the above embodiments, and further includes a service heat source device and a natural cooling device. The outlet of the heat exchange channel 3-11 of the service heat source device is connected to the heat source fluid supply channel 2 of the adsorption refrigeration system, and the cooling water outlet of the natural cooling device is connected to the cooling fluid supply channel 1 of the adsorption refrigeration system. Since this adsorption refrigeration system uses the server system described in the above embodiments, the beneficial effects of this adsorption refrigeration system are explained in the above embodiments.

[0062] 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.

[0063] 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, include: Cooling fluid supply channel (1); Heat source fluid supply channel (2); At least three adsorption modules (3) are provided, each of which includes an adsorption bed (3-1) and a control valve (3-2). The control valve (3-2) is capable of being in at least a first control state and a second control state, respectively, so as to enable the alternating introduction of cooling fluid and heat source fluid into the adsorption bed (3-1) from the cooling fluid supply channel (1) and the heat source fluid supply channel (2), respectively. The control valve (3-2) of the at least three adsorption modules (3) can be controlled independently. Evaporator (4), wherein the evaporation chamber (4-4) of the evaporator (4) is used to communicate with the adsorption chamber (3-12) of the adsorption bed (3-1) when the cooling fluid is introduced into the adsorption bed (3-1) so as to supply the gaseous adsorption working fluid, and the evaporator (4) is also provided with a refrigeration fluid channel (4-1) that can exchange heat with the liquid adsorption working fluid in the evaporation chamber (4-4).

2. The adsorption refrigeration system according to claim 1, characterized in that, Also includes: Cooling fluid discharge channel (5) is used to receive the cooling fluid discharged from each of the adsorption modules (3); The heat source fluid discharge channel (6) is used to receive the heat source fluid discharged from each of the adsorption modules (3); the control valve (3-2) is used to control the connection between the adsorption bed (3-1) and the cooling fluid discharge channel (5) and the heat source fluid discharge channel (6).

3. The adsorption refrigeration system according to claim 2, characterized in that, It includes six, eight, or twelve adsorption modules (3); each adsorption module (3) can be controlled independently.

4. The adsorption refrigeration system according to claim 3, characterized in that, It also includes a controller, which controls the number of adsorption modules (3) in the adsorption stage and the ratio of the number of adsorption modules (3) entering the desorption stage according to the currently acquired ratio of adsorption time and desorption time.

5. The adsorption refrigeration system according to any one of claims 2-4, characterized in that, The control valve (3-2) includes an inlet three-way valve (3-21) and an outlet three-way valve (3-22). One end of the heat exchange channel (3-11) of the adsorption bed (3-1) is connected to the total outlet of the inlet three-way valve (3-21), and the other end is connected to the total inlet of the outlet three-way valve (3-22). The first inlet of the inlet three-way valve (3-21) is connected to the cooling fluid supply channel (1), and the second inlet is connected to the heat source fluid supply channel (2). The first outlet of the outlet three-way valve (3-22) is connected to the cooling fluid discharge channel (5), and the second outlet is connected to the heat source fluid discharge channel (6). When the control valve (3-2) is in the first control state, the first inlet is connected to the total outlet, and the first outlet is connected to the total inlet. When the control valve (3-2) is in the second control state, the second inlet is connected to the total outlet, and the second outlet is connected to the total inlet.

6. The adsorption refrigeration system according to claim 5, characterized in that, It also includes a condenser, wherein the evaporation chamber (4-4) of the evaporator (4) is optionally connected to the adsorption chamber (3-12) corresponding to different adsorption beds (3-1) in the plurality of adsorption beds (3-1) through the first valve group (9); The condenser's condensing chamber is optionally connected to the adsorption chambers (3-12) corresponding to different adsorption beds (3-1) in the plurality of adsorption beds (3-1) through the second valve group (10). The condenser is also provided with a cooling fluid channel for heat exchange with the gaseous adsorption working fluid in the condensing chamber.

7. The adsorption refrigeration system according to any one of claims 2-4, characterized in that, The control valve (3-2) includes a first switching valve, a second switching valve, a third switching valve, and a fourth switching valve; one end of the heat exchange channel (3-11) of the adsorption bed (3-1) is connected to the cooling fluid supply channel (1) through the first switching valve and to the heat source fluid supply channel (2) through the second switching valve; the other end of the heat exchange channel (3-11) of the adsorption bed (3-1) is connected to the cooling fluid discharge channel (5) through the third switching valve and to the heat source fluid discharge channel (6) through the fourth switching valve.

8. The adsorption refrigeration system according to claim 1, characterized in that, It also includes a chilled fluid supply channel (7) and a chilled fluid discharge channel (8). The evaporator (4) includes multiple evaporation units. Each evaporation unit includes an evaporation chamber unit (4-2) and a chilled fluid channel unit (4-3). Each chilled fluid channel unit (4-3) is connected at both ends to the chilled fluid supply channel (7) and the chilled fluid discharge channel (8), respectively. At least three sets of independently controllable adsorption modules (3) correspond one-to-one with the corresponding number of evaporation units.

9. The adsorption refrigeration system according to claim 8, characterized in that, Each cryogenic fluid channel unit (4-3) is connected to the cryogenic fluid supply channel (7) and / or to the cryogenic fluid discharge channel (8) via a switching valve.

10. A server system, further comprising a service heat source device and a natural cooling device, characterized in that, The system includes the adsorption refrigeration system as described in any one of claims 1-8, wherein the outlet of the heat exchange channel (3-11) of the service heat source device is connected to the heat source fluid supply channel (2) of the adsorption refrigeration system, and the cooling water outlet of the natural cooling device is connected to the cooling fluid supply channel (1) of the adsorption refrigeration system.

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