Adsorption refrigeration system, monitoring method thereof, storage medium and product

Abstract

This invention discloses a monitoring method for an adsorption refrigeration system, comprising the following steps: acquiring the adsorption chamber pressure of the first-stage adsorption bed, as the first-stage bed pressure; acquiring the heat exchange chamber pressure of the first heat exchanger currently connected to the adsorption bed, as the first-stage heat exchange pressure; and outputting a first output result when the difference between the first-stage bed pressure and the first-stage heat exchange pressure is less than a first preset value, wherein the first output result indicates that the first stage is completed. The above judgment method relies solely on the pressure difference between the heat exchange chamber and the adsorption chamber, and is a phased judgment method. This provides a reference condition for subsequent monitoring of the adsorption bed's operating efficiency, enabling the adsorption bed's operating efficiency to be monitored and thus ensuring the efficient operation of the adsorption bed. This invention also discloses an adsorption refrigeration system monitoring method, a computer-readable storage medium, and a computer program product.

Description

Technical Field

[0001] This invention relates to the field of adsorption technology, and more specifically, to a method for monitoring an adsorption-cooling system, an adsorption-cooling system using the above-described monitoring method, a computer-readable storage medium storing the adsorption-cooling system monitoring method, and a computer program product using the above-described adsorption-cooling system monitoring method. Background Technology

[0002] Adsorption refrigeration systems generally consist of an adsorption bed, an evaporator, and a condenser. The working principle of an adsorption refrigeration system is based on the adsorption capacity of solid adsorbents (such as zeolite, activated carbon, etc.) for certain refrigerant vapors (such as water, methanol, etc.). Heating the adsorbent causes the refrigerant in the adsorbent to desorb, and the desorbed vapor releases heat and condenses into liquid in the condenser. Cooling the adsorbent allows it to regain its adsorption capacity, and the adsorption causes the refrigerant liquid in the evaporator to evaporate. The evaporation in the evaporator absorbs heat, thus achieving refrigeration.

[0003] In the process of realizing this invention, the inventors discovered at least the following problems in the prior art: For a single adsorption bed, the heat source fluid and cooling fluid need to be alternately introduced to alternately perform desorption and adsorption. To improve efficiency, generally, adsorption needs to begin immediately after desorption is completed, and vice versa. However, many factors affect the desorption and adsorption durations. In practical applications, it is difficult to ensure that the desorption and adsorption durations remain stable. If periodic switching is performed, sufficient time needs to be reserved to ensure that desorption and adsorption are completed, which leads to a decrease in desorption efficiency. Conversely, if sufficient time is not reserved, desorption will be incomplete, which will affect the next stage and impact cooling efficiency. Therefore, there is a problem with the poor monitoring of adsorption bed adsorption efficiency. Summary of the Invention

[0004] In view of the above, the first objective of this invention is to provide an adsorption refrigeration system monitoring method that can effectively solve the problem of poor monitoring effect of adsorption bed desorption efficiency. The second objective of this invention is to provide an adsorption refrigeration system using the above-mentioned adsorption refrigeration system monitoring method. The third objective of this invention is to provide a computer-readable storage medium for storing the above-mentioned adsorption refrigeration system monitoring method. The fourth objective of this invention is to provide a computer program product using the above-mentioned adsorption refrigeration system monitoring method.

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

[0006] A method for monitoring an adsorption refrigeration system includes the following steps:

[0007] The adsorption chamber pressure of the first-stage adsorption bed is obtained as the first-stage bed pressure; the heat exchange chamber pressure of the first heat exchanger currently connected to the adsorption bed is obtained as the first-stage heat exchange pressure.

[0008] When the difference between the bed pressure and the heat exchange pressure in the first stage is less than a first preset value, a first output result is output, wherein the first output result indicates that the first stage is completed.

[0009] In the aforementioned adsorption-refrigeration system monitoring method, the changing trends of the adsorption chamber pressure and the corresponding heat exchanger chamber pressure during the middle and later stages of the adsorption or desorption phase of the adsorption bed are utilized to determine whether the current stage has actually been completed, i.e., whether the current desorption or adsorption has been completed. This judgment method relies solely on the pressure difference between the heat exchanger chamber and the adsorption chamber, providing a reference for subsequent monitoring of the adsorption bed's operating efficiency, thus ensuring its efficient operation. In summary, this adsorption-refrigeration system monitoring method effectively solves the problem of poor monitoring of adsorption bed adsorption-desorption efficiency.

[0010] Some technical solutions also include:

[0011] The adsorption chamber pressure of the adsorption bed in the second stage is obtained as the second stage bed pressure; the heat exchange chamber pressure of the second heat exchanger currently connected to the adsorption bed is obtained as the second stage heat exchange pressure; the first stage is the desorption stage, the second stage is the adsorption stage, the first heat exchanger is a condenser, and the second heat exchanger is an evaporator;

[0012] When the difference between the bed pressure and the heat exchange pressure in the second stage is less than a second preset value, a second output result is output, wherein the second output result indicates that the second stage is completed.

[0013] In some technical solutions, after outputting the first output result, the following steps are also included:

[0014] Stop supplying the desorption heat exchange fluid to the adsorption bed and disconnect the adsorption chamber of the adsorption bed from the heat exchange chamber of the first heat exchanger;

[0015] Heat exchange fluid for adsorption is supplied to the adsorption bed;

[0016] The adsorption chamber of the adsorption bed is connected to the heat exchange chamber of the second heat exchanger;

[0017] The adsorption completion judgment step is executed as follows: when the difference between the bed pressure in the second stage and the heat exchange pressure in the second stage is less than the second preset value, the second output result is output.

[0018] In some technical solutions, after outputting the second output result, the following steps are also included:

[0019] Stop supplying the adsorption heat exchange fluid to the adsorption bed and disconnect the adsorption chamber of the adsorption bed from the heat exchange chamber of the second heat exchanger;

[0020] Desorption heat exchange fluid is supplied to the adsorption bed;

[0021] The adsorption chamber of the adsorption bed is connected to the heat exchange chamber of the first heat exchanger;

[0022] The desorption completion judgment step is performed as follows: when the difference between the bed pressure and the heat exchange pressure in the first stage is less than the first preset value, the first output result is output.

[0023] In some technical solutions, the execution time of the desorption completion judgment step is: the time point after extending the initial time point of the connection between the adsorption chamber of the adsorption bed and the heat exchange chamber of the first heat exchanger by a first predetermined time.

[0024] In some technical solutions, the execution time of the adsorption completion judgment step is: the time point after extending the initial time point of the connection between the adsorption chamber of the adsorption bed and the heat exchange chamber of the second heat exchanger by a second predetermined time.

[0025] In some technical solutions, obtaining the adsorption chamber pressure of the first-stage adsorption bed means obtaining the adsorption chamber pressure of the first-stage adsorption bed in real time; obtaining the heat exchange chamber pressure of the first heat exchanger currently connected to the adsorption bed means obtaining the heat exchange chamber pressure of the first heat exchanger currently connected to the adsorption bed in real time.

[0026] The step of obtaining the adsorption chamber pressure of the second-stage adsorption bed is to obtain the adsorption chamber pressure of the second-stage adsorption bed in real time; the step of obtaining the heat exchange chamber pressure of the second heat exchanger currently connected to the adsorption bed is to obtain the heat exchange chamber pressure of the second heat exchanger currently connected to the adsorption bed in real time.

[0027] In some technical solutions, the gas pressure of the adsorption bed is the average of the gas pressure values ​​at at least a uniformly distributed number of points.

[0028] To achieve the second objective mentioned above, the present invention also provides an adsorption refrigeration system, comprising a first heat exchanger, a second heat exchanger, a control valve, an adsorption chamber containing adsorbent, and a heat exchange channel passing through the adsorption chamber and capable of exchanging heat with the adsorbent. The control valve is used to switch the heat exchange fluid flowing through the heat exchange channel for desorption and adsorption, respectively. The system is characterized by further including a controller, a first pressure sensor for real-time monitoring of the gas pressure of the first heat exchanger, a second pressure sensor for real-time monitoring of the gas pressure of the second heat exchanger, and a third pressure sensor for real-time monitoring of the adsorption bed. The controller is used to execute an acquired computer program to implement any of the above-described adsorption refrigeration system monitoring methods. Since the above-described adsorption refrigeration system monitoring method has the aforementioned technical effects, the adsorption refrigeration system having this monitoring method should also have corresponding technical effects.

[0029] To achieve the third objective mentioned above, the present invention also provides a computer-readable storage medium for storing a computer program that, when executed by a processor, implements any of the aforementioned adsorption refrigeration system monitoring methods. Since the aforementioned adsorption bed monitoring method has the aforementioned technical effects, the computer-readable storage medium applying this adsorption refrigeration system monitoring method should also have corresponding technical effects.

[0030] To achieve the fourth objective mentioned above, the present invention also provides a computer program product, comprising a computer program / instructions, which, when executed by a processor, implements any of the aforementioned adsorption refrigeration system monitoring methods. Since the aforementioned adsorption bed monitoring method possesses the aforementioned technical effects, the computer program product applying this adsorption refrigeration system monitoring method should also possess corresponding technical effects. Attached Figure Description

[0031] 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.

[0032] Figure 1 This is a flowchart illustrating the adsorption refrigeration system monitoring method provided in an embodiment of the present invention.

[0033] Figure 2 A flowchart illustrating another adsorption refrigeration system monitoring method provided in an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the adsorption bed provided in an embodiment of the present invention. Detailed Implementation

[0035] This invention discloses a monitoring method for an adsorption refrigeration system to effectively solve the problem of poor monitoring of adsorption bed desorption efficiency.

[0036] 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.

[0037] Please see Figures 1-2 , Figure 1 This is a flowchart illustrating the adsorption refrigeration system monitoring method provided in an embodiment of the present invention. Figure 2 A flowchart illustrating another adsorption refrigeration system monitoring method provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the adsorption bed provided in an embodiment of the present invention.

[0038] In some embodiments, a method for monitoring an adsorption bed is provided, which mainly includes the following steps:

[0039] S10: Obtain the adsorption gas pressure of the first-stage adsorption bed, which is the first-stage bed pressure; obtain the heat exchange chamber pressure of the first heat exchanger currently connected to the adsorption bed, which is the first-stage heat exchange pressure.

[0040] It should be noted that in the monitoring method provided in this embodiment, the first stage can be either an adsorption stage or a desorption stage. When in the adsorption stage, the first heat exchanger is an evaporator; when in the desorption stage, the first heat exchanger is a condenser. That is, steps S10 and S20 can be performed within one desorption stage or one adsorption stage. For a single adsorption bed, during continuous operation, the desorption stage and adsorption stage generally alternate. During the desorption stage, a high-heat fluid, i.e., a desorption heat exchange fluid, is introduced into the adsorption bed to heat the adsorbent, causing the adsorbed working fluid to desorb and then enter the condenser. When desorption is complete, the adsorbent in the adsorption chamber of the adsorption bed has essentially desorbed the adsorbed working fluid, and at this time, the adsorbent again possesses low-temperature adsorption capabilities and can enter the adsorption stage. During the adsorption stage, a low-temperature fluid, i.e., the heat exchange fluid for adsorption, is introduced into the adsorption bed so that the adsorption bed absorbs heat from the adsorbent, thereby causing heat transfer between the adsorbent and the working fluid. At this time, the gaseous working fluid in the adsorption chamber is adsorbed by the adsorbent, and the evaporation chamber of the evaporator is connected to the adsorption chamber, continuously supplying the working fluid to the adsorption chamber until the adsorbent is saturated. At this point, the adsorbent once again has the function of high-temperature desorption, and can enter the desorption stage.

[0041] The gas pressure of the adsorption chamber in the first stage of the adsorption bed can be obtained from the gas pressure at the center of the adsorption chamber or from other representative adsorption chamber locations. The adsorption bed generally includes an adsorption chamber and a heat exchange channel leading into the adsorption chamber. The heat exchange channel is used to circulate the aforementioned first-stage heat exchange fluid, allowing it to exchange heat with the adsorbent within the adsorption chamber.

[0042] The corresponding gas pressure in the heat exchange chamber of the first heat exchanger currently connected to the adsorption bed can be the gas pressure at the center of the heat exchange chamber or the gas pressure at other representative heat exchange chamber locations. The first heat exchanger mainly includes a heat exchange chamber and heat exchange channels. The heat exchange channels are used to circulate the corresponding heat exchange fluid for heat exchange with the adsorbed working fluid within the heat exchange chamber. For a condenser, the heat exchange chamber is a condensation chamber, and the heat exchange channel is a cooling fluid channel; for an evaporator, the heat exchange chamber is an evaporation chamber, and the heat exchange channel is a chilled fluid channel.

[0043] S20: When the difference between the bed pressure and the heat exchange pressure in the first stage is less than a first preset value, output a first output result, wherein the first output result indicates that the current stage is completed.

[0044] Whether in the adsorption or desorption phase, especially in the later stages, the gas pressure in the adsorption chamber gradually approaches the gas pressure in the heat exchange chamber. Therefore, the bed pressure in the first stage gradually approaches the heat exchange pressure in the first stage until the difference stabilizes. This is because after the first stage is complete, there is no longer any gaseous adsorbent flowing between the adsorption and heat exchange chambers, or the amount of gaseous adsorbent flowing is very small, resulting in a relatively small pressure difference between them. Before the first stage is complete, if it is the adsorption phase, a large amount of gaseous adsorbent from the first heat exchanger will enter the adsorption chamber; if it is the desorption phase, a large amount of gaseous adsorbent from the adsorption chamber will enter the heat exchange chamber of the first heat exchanger. Therefore, before the first stage is complete, the pressure in the adsorption chamber and the corresponding heat exchange chamber pressure will be relatively high to allow the gaseous adsorbent to flow in one direction.

[0045] The first preset value can be obtained by inputting it by staff. Generally, when the adsorption refrigeration system is operating in the first stage for an extended period, after ensuring that desorption or adsorption is fully completed, the pressure difference between the adsorption chamber and the corresponding heat exchange chamber is measured as a reference to set the first preset value. The first preset value is generally slightly larger than the aforementioned pressure difference. Of course, the first preset value can also be set to an approximate value based on the maximum pressure of the adsorption chamber and some design parameters.

[0046] After obtaining the first output result, it can be used for judgment. For example, after obtaining the first output result, the time point at which this output result was obtained can be determined to see if the time stage is too delayed. If so, it indicates that the adsorption bed efficiency in the first stage has decreased. Alternatively, the first output result can be used as a condition to end the current first stage, and then the next stage can be started.

[0047] In the aforementioned adsorption-refrigeration system monitoring method, the changing trends of the adsorption chamber pressure and the corresponding heat exchanger chamber pressure during the middle and later stages of the adsorption or desorption phase of the adsorption bed are utilized to determine whether the current stage has actually been completed, i.e., whether the current desorption or adsorption has been completed. This judgment method relies solely on the pressure difference between the heat exchanger chamber and the adsorption chamber, providing a reference for subsequent monitoring of the adsorption bed's operating efficiency, thus ensuring its efficient operation. In summary, this adsorption-refrigeration system monitoring method effectively solves the problem of poor monitoring of adsorption bed adsorption-desorption efficiency.

[0048] In some embodiments, to monitor both the adsorption and desorption stages, a monitoring method is specifically proposed that monitors both the first and second stages of the adsorption bed. The first stage is the desorption stage, where the first heat exchange fluid introduced into the adsorption bed is a desorption heat exchange fluid. The second stage is the adsorption stage, where the second heat exchange fluid introduced into the adsorption bed is an adsorption heat exchange fluid. Correspondingly, a first heat exchanger and a second heat exchanger can be provided, such that the first heat exchanger functions as a condenser and the second heat exchanger functions as an evaporator. Of course, the first heat exchanger can alternate between being a condenser and an evaporator, but in this approach, the heat exchanger will vary considerably in the early stages of each stage.

[0049] Specifically, based on the above steps S10 and S20, it is preferable to further include:

[0050] Step S30: Obtain the adsorption chamber pressure of the adsorption bed in the second stage, which is the second stage bed pressure; obtain the heat exchange chamber pressure of the second heat exchanger currently connected to the adsorption bed, which is the second stage heat exchange pressure;

[0051] Step S40: When the difference between the bed pressure and the heat exchange pressure in the second stage is less than a second preset value, output a second output result, wherein the second output result indicates that the second stage is completed.

[0052] To obtain the pressure in the adsorption chamber of the second stage, the same method as for obtaining the pressure in the adsorption chamber of the first stage can be used, and even the same set of pressure sensors can be used. Alternatively, different pressure sensors can be used. Specifically, the first heat exchanger is a condenser, and the pressure in the condensation chamber is obtained, while the second heat exchanger is an evaporator, and the pressure in the evaporation chamber is obtained.

[0053] The first and second preset values ​​can be specifically referenced based on the pressure difference observed when desorption and adsorption are complete. Therefore, the methods for obtaining both can be the same, but the acquisition steps can be adjusted.

[0054] The first output indicates that the first stage is complete, i.e., the desorption stage is actually completed, while the second output indicates that the second stage is complete, i.e., the adsorption stage is actually completed.

[0055] It should be noted that steps S30 and S40 should be performed within one stage.

[0056] The above method allows for monitoring of both the adsorption phase and the adsorption process.

[0057] In some embodiments, after outputting the first output result, i.e. after step S20, the following steps are further included:

[0058] Step S50: Stop supplying the desorption heat exchange fluid to the adsorption bed and disconnect the adsorption chamber of the adsorption bed from the heat exchange chamber of the first heat exchanger.

[0059] Step S60: Supply the adsorption heat exchange fluid to the adsorption bed.

[0060] Step S70: Connect the adsorption chamber of the adsorption bed to the heat exchange chamber of the second heat exchanger;

[0061] Proceed to step S40: Perform the adsorption completion judgment step: When the difference between the bed pressure in the second stage and the heat exchange pressure in the second stage is less than the second preset value, output the second output result.

[0062] That is, after step S20, step S50 is executed. After the first output result is output, the controller can execute step S50 based on the obtained first output result. That is, the current adsorption bed stops desorption and disconnects the connection with the first heat exchanger, that is, disconnects the condenser chamber of the condenser. These two steps can be performed simultaneously or separately.

[0063] Then, step S60 is executed, that is, the heat exchange fluid for adsorption is introduced, and step S70 is executed simultaneously or afterward to connect the adsorption chamber and the evaporation chamber of the second heat exchanger. At this time, the adsorption bed begins to enter the second stage, that is, it begins to enter the adsorption stage.

[0064] Then the judgment step in step S40 can be executed. However, it should be noted that step S30 can be executed continuously during the execution of steps S50 to S70, or even while step S40 is being executed, but can be executed continuously between steps S70 and S40; or it can be executed after step S70 until step S40 is executed.

[0065] In some embodiments, after executing step S40, that is, after outputting the second output result, the following steps are also included:

[0066] Step S80: Stop supplying the adsorption heat exchange fluid to the adsorption bed and disconnect the adsorption chamber of the adsorption bed from the heat exchange chamber of the second heat exchanger;

[0067] Step S90: Supply the desorption heat exchange fluid to the adsorption bed;

[0068] Step S100: Connect the adsorption chamber of the adsorption bed to the heat exchange chamber of the first heat exchanger;

[0069] Execution step S20: Desorption completion judgment step: When the difference between the bed pressure in the first stage and the heat exchange pressure in the first stage is less than the first preset value, output the first output result.

[0070] That is, after step S40, step S80 is executed. After the second output result is output, the controller can execute step S0 based on the obtained second output result. That is, the current adsorption bed stops adsorption and disconnects the connection with the second heat exchanger, that is, disconnects the evaporation chamber of the evaporator. These two steps can be performed simultaneously or separately.

[0071] Then, step S90 is executed, that is, the heat exchange fluid for desorption is introduced, and step S100 is executed simultaneously or afterward to connect the adsorption chamber and the condensation chamber of the first heat exchanger. At this time, the adsorption bed begins to enter the first stage, that is, the desorption stage begins.

[0072] Then the judgment step in step S20 can be executed. However, it should be noted that step S0 can be in the execution state from step S80 to step S100, or even while step S20 is being executed, step S10 can be executed at the same time, but it can be executed continuously from step S100 to step S20; or it can be executed after step S100 until step S20 is executed.

[0073] In some embodiments, considering the adsorption and desorption phases, the pressure changes in the very short initial phase are significantly affected by changes in the connectivity between the various structures. Therefore, step S100 is preferably included here:

[0074] Step S110: Connect the adsorption chamber of the adsorption bed to the heat exchange chamber of the first heat exchanger, and determine the first time point;

[0075] Step S120: When the time interval between the current time and the first time point reaches the first predetermined duration, proceed to the desorption completion judgment step.

[0076] After step S110 is completed, the adsorption bed enters the first stage, namely the desorption stage. However, the judgment in step S20 does not begin at this point. Instead, a time judgment is performed first to ensure that the desorption stage enters a stable phase. Generally, the first predetermined time should ensure that the pressure in the adsorption chamber is sufficiently higher than the pressure in the condensation chamber. Typically, the first predetermined time can be the time required for preheating to complete, or about one-tenth of the estimated desorption time, to ensure effective monitoring. That is, step S20 is executed after step S120 to avoid early interference in the first stage.

[0077] Similarly, step S70 can specifically include:

[0078] Step S71: Connect the adsorption chamber of the adsorption bed to the heat exchange chamber of the second heat exchanger, and determine the second time point;

[0079] Step S72: When the time interval between the current time and the second time point reaches the second predetermined duration, proceed to the adsorption completion judgment step.

[0080] After step S71, the adsorption bed enters the second stage, the adsorption stage. However, the judgment in step S40 does not begin at this point. Instead, a time judgment is performed first to ensure that the adsorption stage reaches a stable state. Generally, the second predetermined time should ensure that the pressure in the adsorption chamber is sufficiently lower than the pressure in the evaporation chamber. Typically, the second predetermined time can be the time required for pre-cooling to complete, or about one-tenth of the estimated adsorption time, to ensure effective monitoring. That is, step S40 is executed after step S72 to avoid early interference in the second stage.

[0081] In some embodiments, to ensure data reliability, it is preferable to obtain the adsorption chamber pressure of the first-stage adsorption bed, which is to obtain the adsorption chamber pressure of the first-stage adsorption bed in real time; the acquisition of the heat exchange chamber pressure of the first heat exchanger currently connected to the adsorption bed is to obtain the heat exchange chamber pressure of the first heat exchanger currently connected to the adsorption bed in real time.

[0082] The step of obtaining the adsorption chamber pressure of the second-stage adsorption bed is to obtain the adsorption chamber pressure of the second-stage adsorption bed in real time; the step of obtaining the heat exchange chamber pressure of the second heat exchanger currently connected to the adsorption bed is to obtain the heat exchange chamber pressure of the second heat exchanger currently connected to the adsorption bed in real time.

[0083] By acquiring data in real time as described above, the reliability of monitoring can be guaranteed. Of course, periodic acquisition is also possible, but the interval between periodic acquisitions should not be too long; for example, an interval of about one second is acceptable.

[0084] In some embodiments, considering the relatively large volume of the adsorption chamber and factors such as mass and heat transfer efficiency, it is preferable that the gas pressure of the adsorption bed is the average value of the gas pressure values ​​at at least a uniformly distributed number of points to ensure the representativeness of the gas pressure monitoring.

[0085] In some embodiments, a method for monitoring an adsorption bed is provided, which mainly includes the following steps:

[0086] Step 210: Obtain the gas pressure of the adsorption chamber of the adsorption bed in the current desorption stage, which is the desorption stage bed pressure Pdes; obtain the gas pressure of the condenser chamber that is currently connected to the adsorption bed, which is the condenser chamber pressure Pcon.

[0087] For an adsorption bed, during the desorption stage, a high-temperature heat exchange fluid for desorption is introduced into the bed, causing it to rapidly heat up to the desorption temperature. Desorption then commences. During the preheating stage, a small amount of adsorbent may desorb from the adsorbent. As the adsorption chamber rapidly heats up, a large amount of adsorbent desorbs from the adsorbent. The pressure inside the adsorption bed rises rapidly until it exceeds the pressure in the condenser, at which point the gaseous adsorbent enters the connected condenser.

[0088] When the temperature inside the adsorption chamber rapidly rises to the desorption temperature, the content of the gaseous adsorbent is at a high level. Combined with the temperature increase, this causes the pressure in the adsorption bed to reach its maximum. This, in turn, leads to an increase in both the temperature and pressure in the condenser's condensation chamber.

[0089] Within a short period, the pressures in both the adsorption chamber of the adsorption bed and the condenser chamber of the condenser reach their maximum values. Then, as the desorption rate gradually decreases, although the overall temperature of the adsorption bed continues to rise, the rate of temperature increase is relatively small, so the impact on the gas pressure is not significant, and the pressure in the adsorption bed gradually decreases. As for the condenser chamber, due to the decrease in the mass of the gaseous working material and the continuous input of cooling water, the pressure in the condenser chamber also decreases, and it is always maintained that the pressure in the adsorption chamber is greater than the pressure in the condenser chamber.

[0090] Then, when desorption is complete or almost complete, the amount of gaseous working fluid flowing from the adsorption chamber to the condensation chamber is very small or almost zero. At this point, the pressure in the adsorption chamber and the pressure in the condensation chamber are equal or nearly equal.

[0091] To better illustrate the above characteristics, let's take an example:

[0092] Initially, when the desorption heat exchange fluid is about to be introduced, the temperature inside the adsorption bed is approximately 30 degrees Celsius, close to the temperature of the adsorption heat exchange fluid. At this time, the pressure in the adsorption bed is close to the pressure in the evaporator chamber, and is at a relatively low level, such as around 1.5 kPa, while the pressure in the condenser is approximately 4 kPa.

[0093] Initially, when a desorption heat exchange fluid, such as a desorption heat exchange fluid at 55 degrees Celsius, is introduced, the adsorption bed is preheated within tens of seconds (e.g., 30 seconds, the desorption time is generally 15 minutes). After preheating, the temperature of the adsorption bed will rise to about 50 degrees Celsius, and the pressure of the adsorption bed may rise to 6 kPa.

[0094] For the condenser, there are three scenarios: First, while the desorption heat exchange fluid is introduced into the adsorption bed, the adsorption chamber and condensation chamber of the adsorption bed are connected. From this point until preheating is complete, there are two stages. In the initial stage, the gas in the condensation chamber flows into the evaporation chamber for a very short time, causing a slight pressure drop, lasting about 10 seconds. In the later stage, following the pressure in the adsorption chamber, the pressure rises rapidly, causing the condenser pressure to rise to about 5.5 kPa, but still less than the pressure in the adsorption chamber. This process takes approximately 20 seconds.

[0095] The second scenario is that when the preheating of the adsorption bed is completed or nearly completed, the adsorption chamber and the condensation chamber of the adsorption bed are connected. At this time, the pressure in the condensation chamber will rise rapidly due to the influence of the adsorption bed, reaching about 5.4 kPa, but it is still less than the pressure in the adsorption chamber.

[0096] The third scenario involves installing a one-way valve between the adsorption chamber and the condensation chamber of the adsorption bed. When the pressure in the adsorption chamber of the adsorption bed rises from 1.5 kPa to 4 kPa, the one-way valve opens. Subsequently, the pressure in the condensation chamber gradually rises along with the pressure in the adsorption chamber. During this process, the pressure in the condensation chamber is always lower than the pressure in the adsorption chamber until it rises to 5.4 kPa, while the pressure in the adsorption bed reaches about 6 kPa.

[0097] Therefore, regardless of the above situation, around the time the preheating is completed, approximately 30 seconds have passed since the desorption heat exchange fluid was first introduced. At this point, the pressure in the adsorption chamber of the adsorption bed rises to 6 kPa, while the pressure in the condenser chamber rises to 5.5 kPa.

[0098] During the main desorption phase, the adsorption bed is continuously fed with the desorption heat exchange fluid. The desorbed gaseous adsorbent, under pressure, continuously enters the condenser. During this stage, a certain pressure difference is maintained between the condenser and adsorption chambers, with the pressure in the adsorption chamber significantly higher than that in the condenser. However, as the amount of desorbed gaseous adsorbent gradually decreases, and this decrease shows a clear trend, the pressure in the condenser continuously drops, and simultaneously, the pressure in the adsorption chamber also continuously decreases.

[0099] In the later stages of desorption, the amount of adsorbate that the adsorbent can desorb significantly decreases. At this point, the pressure in the condenser chamber continues to drop, and the pressure in the adsorption chamber also continues to decrease. Notably, the pressure difference between the condenser and adsorption chambers gradually diminishes. This is because the desorption efficiency in the adsorption chamber decreases, while the condensation capacity of the condenser chamber remains unchanged, thus leading to a decrease in pressure between the two chambers.

[0100] Around the end of desorption, the pressure in the condenser chamber gradually decreases to 4 kPa, while the pressure in the adsorption chamber also continues to decrease, dropping to around 4.2 kPa, and even approaching 4 kPa due to reduced thermal and flow resistance. At this point, the adsorption and condenser chambers are almost in equilibrium. There is no longer any gaseous adsorbate flowing between the adsorption and condenser chambers, or the flow tendency is negligible. This is because no more adsorbate is desorbed from the adsorption chamber, and the cooling fluid in the condenser chamber can no longer absorb heat, so the condenser chamber also reaches a new equilibrium. At this point, the temperature in the adsorption chamber will reach around 54 degrees Celsius, while the temperature in the condenser chamber will again reach around 30 degrees Celsius.

[0101] Step 220: When the difference between the bed pressure Pdes and the condensation chamber pressure Pcon during the desorption stage is less than a first preset pressure value, output the first output result, wherein the difference is less than the first preset pressure value, indicating that the current desorption stage is completed.

[0102] The first preset pressure value is generally a fixed value. To ensure the reliability of this fixed value, it can be obtained experimentally. During the experiment, for example, the time for introducing the heat exchange fluid for desorption can be extended to ensure the pressure difference between the adsorption chamber and the condensation chamber reaches equilibrium. If multiple experiments show that the pressure difference between the adsorption chamber and the connected condensation chamber of the current adsorption refrigeration system fluctuates between 0.1 kPa and 0.2 kPa when desorption is fully completed, then the first preset pressure value can be set at 0.25 kPa. Through the above analysis, it can be found that when the adsorption bed can still desorb the gaseous adsorbent, the pressure difference between the adsorption chamber and the connected condensation chamber is generally not less than 0.3 kPa. Of course, the first preset pressure value can also be obtained through other methods.

[0103] Based on the above analysis, it can be observed that during the desorption stage, at least in the middle and later stages, the pressures in both the adsorption chamber and the condensation chamber gradually decrease simultaneously. Furthermore, the pressure in the condensation chamber gradually approaches the pressure in the adsorption chamber until they are equal or maintained within a small pressure difference range. Therefore, the difference between the bed pressure Pdes and the condensation chamber pressure Pcon during the desorption stage can be used to determine whether desorption is complete. The accuracy of this determination depends on the source of the first preset pressure value, but it is at least sufficient for effective judgment.

[0104] After a valid judgment is made, a first output result will be output. This first output result can be used as a monitoring condition to determine the desorption efficiency of the adsorption bed. It can also be used as a control condition for the adsorption bed, as a condition to stop the flow of heat exchange fluid for desorption, that is, as a necessary condition for the adsorption bed to switch to the adsorption stage. In other words, the prerequisite for switching to the adsorption stage is that the aforementioned first output result must be obtained.

[0105] Considering the three scenarios mentioned above, specifically, after the desorption heat exchange fluid is introduced into the adsorption bed, step 220 can be executed after the adsorption bed has completed preheating. Step 210 can be executed before preheating is complete and continue until step 220 is executed; alternatively, step 210 can be executed after preheating is complete and continue until step 220 is executed. Of course, step 210 can also be executed while step 220 is being executed. The completion of preheating can be determined by the duration of the desorption heat exchange fluid introduction. Under a fixed temperature and flow rate, the preheating time of the adsorption bed is fixed. Even with fluctuations, extending the preset time will not have a substantial impact because the preheating time is very short compared to the entire desorption time. Alternatively, it can be determined by the inlet and outlet temperature difference of the desorption heat exchange fluid in the adsorption bed, or solely by the outlet temperature of the desorption heat exchange fluid in the adsorption bed.

[0106] Step 230: After obtaining the first output result, stop supplying the desorption heat exchange fluid to the adsorption bed, and then start supplying the adsorption heat exchange fluid to the adsorption bed.

[0107] Furthermore, the first output result is used as the switching condition. After obtaining the first output result, it means that desorption is complete, and then the next stage can be entered, namely the adsorption stage, to introduce the heat exchange fluid for adsorption.

[0108] Step 240: Obtain the gas pressure of the adsorption chamber of the adsorption bed in the current adsorption stage, which is the adsorption stage bed pressure Pads; obtain the gas pressure of the evaporator chamber that is currently connected to the adsorption bed, which is the evaporator chamber pressure Pevp.

[0109] For an adsorption bed, during the adsorption stage, a relatively low-temperature heat exchange fluid is introduced into the bed, causing it to cool rapidly to pre-cool and reach the adsorption temperature. Adsorption then commences. During the pre-cooling stage, a small amount of working fluid may be adsorbed by the adsorbent. As the adsorption chamber rapidly cools, the adsorbent generates a high adsorption capacity, adsorbing a large amount of working fluid. The pressure within the adsorption bed drops rapidly until it falls below that of the evaporation chamber, allowing the gaseous working fluid from the evaporation chamber to enter the connected adsorption chamber for adsorption by the adsorbent.

[0110] When the temperature inside the adsorption chamber rapidly decreases to the adsorption temperature, the content of the gaseous adsorbent is at a low level. Combined with the temperature drop, this causes the pressure in the adsorption bed to reach its minimum. This may affect the pressure in the evaporation chamber, but the impact will not be significant.

[0111] In reality, after the adsorption heat exchange fluid is introduced, the pressure in the adsorption chamber quickly reaches its lowest value within a short period. Then, as the amount of gaseous working fluid that the adsorption bed can adsorb gradually decreases, the amount of gaseous working fluid to be adsorbed in the adsorption bed gradually increases. Although the overall temperature of the adsorption bed continues to decrease, the rate of temperature decrease is relatively small, so the impact on the gas pressure is not significant; therefore, the pressure in the adsorption bed will still gradually increase. As for the evaporation chamber, due to continuous evaporation forming gaseous working fluid, and with the increase in the amount of gaseous working fluid discharged, more gaseous working fluid will be formed through evaporation. Therefore, the pressure in the evaporation chamber is relatively stable compared to the adsorption chamber. If there are changes in the pressure in the evaporation chamber, they will be slight changes, with a gradual decrease in pressure. As evaporation is completed, the evaporator temperature rises slightly due to the reduced evaporation rate, and the pressure in the condensation chamber will also gradually increase slightly.

[0112] Then, when desorption is complete or almost complete, the amount of gaseous working fluid flowing from the evaporation chamber into the adsorption chamber is very small or almost zero. At this point, the pressure in the adsorption chamber and the pressure in the evaporation chamber are equal or nearly equal.

[0113] To better illustrate the above characteristics, let's take an example:

[0114] In the initial stage, when the heat exchange fluid for adsorption is about to be introduced, as in the example above, the temperature inside the adsorption bed is approximately 54 degrees Celsius, close to the temperature of the heat exchange fluid for desorption. At this time, the pressure of the adsorption bed is close to the pressure of the condenser's condensing chamber, and is at a relatively high level, such as around 4.2 kPa, while the pressure of the evaporator is approximately 1.8 kPa.

[0115] Initially, when the heat exchange fluid for adsorption is introduced, such as the adsorption heat exchange fluid at 30 degrees Celsius, the adsorption bed will be pre-cooled within tens of seconds (e.g., 30 seconds, the adsorption time is generally 15 minutes). After the pre-cooling is completed, the temperature of the adsorption bed will drop to about 35 degrees Celsius, and the pressure of the adsorption bed may drop to 0.9 kPa.

[0116] For the evaporator, there are three scenarios:

[0117] In the first scenario, the adsorption chamber and evaporation chamber of the adsorption bed are connected simultaneously with the heat exchange fluid for adsorption. From the initial stage to the completion of precooling, there are two phases. Initially, the pressure in the evaporation chamber is lower than that in the adsorption chamber, causing gas to flow from the adsorption chamber into the evaporation chamber. This flow is very brief, causing the gas pressure to rise, for example, to 2.5 kPa, lasting approximately 10 seconds. Later, as the pressure in the adsorption chamber decreases rapidly, the pressure in the evaporation chamber drops again to around 1.5 kPa, but remains higher than the pressure in the adsorption chamber, which is approximately 0.9 kPa. This process takes roughly 40 seconds.

[0118] The second scenario is when the precooling of the adsorption bed is completed or nearly completed, and the pressure in the adsorption chamber is about 0.9 kPa. At this time, the adsorption chamber and the evaporation chamber of the adsorption bed are connected. The pressure in the evaporation chamber will be affected by the adsorption bed, but the effect is relatively small and may drop to about 1.4 kPa, but it is still greater than the pressure in the adsorption chamber.

[0119] The third scenario involves installing a one-way valve between the adsorption chamber and the evaporation chamber of the adsorption bed. When the pressure in the adsorption chamber of the adsorption bed drops from 4.2 kPa to 1.8 kPa, the one-way valve opens, and then the pressure in the evaporation chamber gradually decreases along with the pressure in the adsorption chamber. During this process, the pressure in the evaporation chamber is always greater than the pressure in the adsorption chamber until it drops to 1.5 kPa, while the pressure in the adsorption bed reaches about 0.9 kPa.

[0120] Therefore, regardless of the above situation, around the time the preheating is completed, approximately 60 seconds have passed since the adsorption heat exchange fluid was first introduced. At this point, the pressure in the adsorption chamber of the adsorption bed drops to 0.9 kPa, while the pressure in the evaporation chamber of the evaporator drops to 1.5 kPa.

[0121] During the main adsorption period, the adsorption bed is continuously fed with the heat exchange fluid for adsorption. The gaseous adsorbent in the evaporation chamber continuously enters the adsorption chamber under pressure. During this stage, a certain pressure difference is maintained between the adsorption and evaporation chambers, with the pressure in the evaporation chamber being significantly greater than that in the adsorption chamber. However, because the amount of gaseous adsorbent that the adsorbent can adsorb in the adsorption chamber gradually decreases, and this decrease shows a clear trend, the pressure in the adsorption chamber gradually and slowly rises, possibly with oscillating increases. Simultaneously, the pressure in the evaporation chamber rises even more slowly, or may remain within a small range of fluctuations, with a trend closer to flatness compared to the pressure in the adsorption chamber.

[0122] In the later stages of adsorption, the amount of working fluid that the adsorbent can adsorb decreases significantly. At this point, the pressure in the adsorption chamber continues to rise, while the pressure in the evaporation chamber remains at a relatively high level. Moreover, the pressure difference between the adsorption and evaporation chambers gradually decreases. This is because the adsorption efficiency in the adsorption chamber declines, leading to a smaller pressure difference between the two chambers.

[0123] Around the end of adsorption, the pressure in the adsorption chamber gradually rises to 1.5 kPa, while the pressure in the evaporation chamber also continues to rise to around 1.8 kPa, even approaching 1.5 kPa as thermal and flow resistance decrease. At this point, the adsorption and evaporation chambers are almost in equilibrium. There is no longer any flow of gaseous adsorbent between the adsorption and evaporation chambers, or the flow tendency is negligible. This is because the adsorption chamber can no longer adsorb new gaseous adsorbent, and the evaporation chamber can no longer evaporate gaseous adsorbent, so the evaporation chamber also reaches a new equilibrium.

[0124] Step 250: When the difference between the bed pressure Pads and the evaporation chamber pressure Pevp in the adsorption stage is less than the second preset pressure value, output the second output result, wherein the difference is less than the second preset pressure value, indicating that the current adsorption stage is completed.

[0125] The second preset pressure value is generally a fixed value. To ensure the reliability of this fixed value, it can be obtained experimentally. During experiments, the time for introducing the heat exchange fluid for adsorption can be extended to ensure the pressure difference between the adsorption chamber and the evaporation chamber reaches equilibrium. If multiple experiments show that the pressure difference between the adsorption chamber and the connected evaporation chamber of the current adsorption refrigeration system fluctuates between 0.2 kPa and 0.3 kPa when adsorption is fully completed, then the second preset pressure value can be set at 0.35 kPa. The above analysis shows that when the adsorption bed can still adsorb gaseous working fluid, the pressure difference between the adsorption chamber and the connected condensation chamber is generally not less than 0.4 kPa. Of course, the second preset pressure value can also be obtained through other methods.

[0126] Based on the above analysis, it can be observed that during the adsorption stage, at least in the middle and later stages, the pressures in both the adsorption chamber and the evaporation chamber gradually increase simultaneously, or the pressure in the evaporation chamber remains constant while the pressure in the adsorption chamber gradually increases, and the pressure in the adsorption chamber gradually approaches the pressure in the evaporation chamber until they are equal or maintained within a small pressure difference range. Therefore, the difference between the bed pressure Pads and the evaporation chamber pressure Pevp during the adsorption stage can be used to determine whether adsorption is complete. The accuracy of this determination depends on the source of the second preset pressure value setting, but it is at least sufficient for effective determination.

[0127] After a valid judgment is made, a second output result will be output. This second output result can be used as a monitoring condition to determine the adsorption efficiency of the adsorption bed. It can also be used as a control condition for the adsorption bed, such as stopping the flow of the heat exchange fluid for adsorption, which is a necessary condition for the adsorption bed to switch to the desorption stage. In other words, the prerequisite for switching to the desorption stage is that the aforementioned first output result must be obtained.

[0128] Considering the three scenarios mentioned above, specifically, after the adsorption bed is introduced with the adsorption heat exchange fluid, step 250 can be executed after the adsorption bed has completed precooling. Step 240 can be executed before precooling is complete and continue until step 250 is executed; alternatively, step 240 can be executed after precooling is complete and continue until step 250 is executed. Of course, step 240 can also be executed while step 250 is being executed. The completion of precooling can be determined by the duration of the adsorption heat exchange fluid introduction. Under a fixed temperature and flow rate, the precooling time of the adsorption bed is fixed. Even if there are fluctuations, extending the preset time will not have a substantial impact because the precooling time is very short compared to the entire adsorption time. Alternatively, it can be determined by the inlet and outlet temperature difference of the adsorption heat exchange fluid in the adsorption bed, or simply by the outlet temperature of the adsorption heat exchange fluid in the adsorption bed.

[0129] Step 260: After obtaining the second output result, stop supplying the adsorption heat exchange fluid to the adsorption bed, and then start supplying the desorption heat exchange fluid to the adsorption bed.

[0130] Furthermore, the second output result is used as the switching condition. That is, after obtaining the second output result, it means that the adsorption is complete, and then the next stage can be entered, namely the desorption stage, to introduce the heat exchange fluid for desorption.

[0131] Step 270: Return to step 210 until the adsorption bed stops running.

[0132] Based on the adsorption refrigeration system monitoring method provided in the above embodiments, the present invention also provides an adsorption bed. The adsorption refrigeration system includes a first heat exchanger, a second heat exchanger, a control valve, an adsorption chamber containing adsorbent, and a heat exchange channel passing through the adsorption chamber and capable of exchanging heat with the adsorbent. The control valve is used to switch the heat exchange fluid flowing into the heat exchange channel for desorption and adsorption, respectively. The system is characterized by further including a controller, a first pressure sensor for real-time monitoring of the gas pressure of the first heat exchanger, a second pressure sensor for real-time monitoring of the gas pressure of the second heat exchanger, and a third pressure sensor for real-time monitoring of the adsorption bed. The controller is used to execute an acquired computer program to implement any one of the adsorption refrigeration system monitoring methods in the above embodiments. Since this adsorption bed adopts the adsorption refrigeration system monitoring method in the above embodiments, the beneficial effects of this adsorption bed are explained in the above embodiments.

[0133] The adsorption bed contains an adsorbent in its adsorption chamber. The working fluid, used in conjunction with the adsorbent, flows through the adsorption chamber and the condensation chamber of the condenser, and also flows through the evaporator. The working fluid and adsorbent combine to form a working fluid pair. In an adsorption refrigeration system, multiple working fluid pairs can be configured. One adsorbent can be paired with different working fluids, or multiple adsorbents can be paired with a single working fluid. A typical adsorption refrigeration system includes the aforementioned adsorption bed, evaporator, and condenser.

[0134] For adsorption beds, there are two main operating states: adsorption and desorption, which are generally carried out in stages. In the adsorption state, a low-temperature fluid, i.e., the heat exchange fluid for adsorption, is used to cool the adsorption bed, allowing the adsorbent within the bed to adsorb the gaseous working fluid, ensuring continuous adsorption capacity in the adsorption chamber until the adsorbent reaches a preset saturation state. Taking physical adsorption as an example, the gaseous working fluid liquefies into a liquid state, maintaining a low-pressure state within the adsorption chamber to continuously draw in gaseous working fluid, such as continuously adsorbing gaseous working fluid from the evaporator, allowing the evaporator to continuously absorb heat through evaporation. In the desorption state, a high-temperature fluid, i.e., the heat exchange fluid for desorption, is generally used to heat the adsorption bed, causing the adsorbent to desorb from the adsorbent, forming a gaseous working fluid again. This gaseous working fluid then enters the condenser, where it liquefies back into a liquid state. The evaporator and condenser can be the same structure to alternate between evaporation and condensation; or they can be two structures, as shown in the attached figure. When there are two adsorption beds, the two adsorption beds alternate between desorption and adsorption. At this time, the adsorption time and desorption time are approximately equal. In this case, two structures can be used as the evaporator and condenser, respectively.

[0135] The adsorption bed has heat exchange channels for heat exchange with the adsorbent in the adsorption chamber. These heat exchange channels are designed to allow the flow of a high-temperature fluid (heat source fluid) during the desorption phase. During the adsorption phase, these channels can be closed or used to allow the flow of a low-temperature fluid. The heat exchange channels exchange heat with the adsorbent, ensuring that during the desorption phase, a high-temperature fluid flows through them, keeping the entire adsorption chamber at a high temperature. After absorbing heat, the adsorbent desorbs a gaseous working fluid, which absorbs heat from the high-temperature fluid in the heat exchange channels. This gaseous working fluid can be discharged to the outside or into the condenser's condensation chamber, where it is condensed back into a gaseous state.

[0136] The control valve is typically a three-way valve, used to alternately introduce the adsorption heat exchange fluid and the desorption heat exchange fluid. Alternatively, multiple three-way valves can be installed to correspond to multiple adsorption beds, allowing the adsorption heat exchange fluid and the desorption heat exchange fluid to be alternately introduced into each adsorption bed.

[0137] Based on the adsorption refrigeration system monitoring method provided in the above embodiments, the present invention also provides a computer-readable storage medium for storing a computer program, which, when executed by a processor, implements any one of the adsorption refrigeration system monitoring methods in the above embodiments. Since this computer-readable storage medium employs the adsorption refrigeration system monitoring method in the above embodiments, the beneficial effects of this computer-readable storage medium are explained in the above embodiments.

[0138] Based on the adsorption refrigeration system monitoring method provided in the above embodiments, the present invention also provides a computer program product, which includes a computer program / instructions. When executed by a processor, the computer program / instructions implement any one of the adsorption refrigeration system monitoring methods in the above embodiments. Since this computer program product employs the adsorption refrigeration system monitoring method in the above embodiments, the beneficial effects of this computer program product are explained in the above embodiments.

[0139] 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.

[0140] 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. A method of monitoring an adsorption refrigeration system, characterized in that Includes the following steps: The adsorption chamber pressure of the first-stage adsorption bed is obtained as the first-stage bed pressure; the heat exchange chamber pressure of the first heat exchanger currently connected to the adsorption bed is obtained as the first-stage heat exchange pressure. When the difference between the bed pressure and the heat exchange pressure in the first stage is less than a first preset value, a first output result is output, wherein the first output result indicates that the first stage is completed.

2. The adsorption refrigeration system monitoring method of claim 1, wherein, Also includes: Obtain the gas pressure in the adsorption chamber of the second-stage adsorption bed, which is the second-stage bed pressure; The gas pressure in the heat exchange chamber of the second heat exchanger currently connected to the adsorption bed is obtained as the second-stage heat exchange pressure; the first stage is the desorption stage, the second stage is the adsorption stage, the first heat exchanger is a condenser, and the second heat exchanger is an evaporator; When the difference between the bed pressure and the heat exchange pressure in the second stage is less than a second preset value, a second output result is output, wherein the second output result indicates that the second stage is completed.

3. The adsorption refrigeration system monitoring method of claim 2, wherein, After outputting the first output result, the following steps are also included: Stop supplying the desorption heat exchange fluid to the adsorption bed and disconnect the adsorption chamber of the adsorption bed from the heat exchange chamber of the first heat exchanger; Heat exchange fluid for adsorption is supplied to the adsorption bed; The adsorption chamber of the adsorption bed is connected to the heat exchange chamber of the second heat exchanger; The adsorption completion judgment step is executed as follows: when the difference between the bed pressure in the second stage and the heat exchange pressure in the second stage is less than the second preset value, the second output result is output.

4. The adsorption refrigeration system monitoring method of claim 3, wherein, After outputting the second output result, the following steps are also included: Stop supplying the adsorption heat exchange fluid to the adsorption bed and disconnect the adsorption chamber of the adsorption bed from the heat exchange chamber of the second heat exchanger; Desorption heat exchange fluid is supplied to the adsorption bed; The adsorption chamber of the adsorption bed is connected to the heat exchange chamber of the first heat exchanger; The desorption completion judgment step is performed as follows: when the difference between the bed pressure and the heat exchange pressure in the first stage is less than the first preset value, the first output result is output.

5. The adsorption refrigeration system monitoring method of claim 4, wherein, The execution time point of the desorption completion judgment step is: the time point after extending the initial time point of the connection between the adsorption chamber of the adsorption bed and the heat exchange chamber of the first heat exchanger by a first predetermined time.

6. The adsorption refrigeration system monitoring method of claim 5, wherein, The execution time point of the adsorption completion judgment step is: the time point after extending the initial time point of the adsorption chamber of the adsorption bed and the heat exchange chamber of the second heat exchanger by a second predetermined time.

7. The adsorption refrigeration system monitoring method of claim 6, wherein, The step of obtaining the adsorption chamber pressure of the first-stage adsorption bed is to obtain the adsorption chamber pressure of the first-stage adsorption bed in real time; the step of obtaining the heat exchange chamber pressure of the first heat exchanger currently connected to the adsorption bed is to obtain the heat exchange chamber pressure of the first heat exchanger currently connected to the adsorption bed in real time. The step of obtaining the adsorption chamber pressure of the second-stage adsorption bed is to obtain the adsorption chamber pressure of the second-stage adsorption bed in real time; the step of obtaining the heat exchange chamber pressure of the second heat exchanger currently connected to the adsorption bed is to obtain the heat exchange chamber pressure of the second heat exchanger currently connected to the adsorption bed in real time.

8. In the adsorption refrigeration system monitoring method according to claim 7, the gas pressure of the adsorption bed is the average value of the gas pressure values ​​at least uniformly distributed multiple points.

9. An adsorption refrigeration system, comprising a first heat exchanger, a second heat exchanger, a control valve, an adsorption chamber containing an adsorbent, and a heat exchange channel passing through the adsorption chamber and capable of exchanging heat with the adsorbent, wherein the control valve is used to switch the heat exchange fluid flowing into the heat exchange channel for desorption and adsorption respectively, characterized in that, It also includes a controller, a first pressure sensor for real-time monitoring of the gas pressure of the first heat exchanger, a second pressure sensor for real-time monitoring of the gas pressure of the second heat exchanger, and a third pressure sensor for real-time monitoring of the adsorption bed. The controller is used to execute the acquired computer program to implement the adsorption refrigeration system monitoring method as described in any one of claims 1 to 8.

10. A computer-readable storage medium, characterized in that, Used to store a computer program, which, when executed by a processor, implements the adsorption refrigeration system monitoring method as described in any one of claims 1 to 8.

11. A computer program product, comprising a computer program / instructions, characterized in that, When the computer program / instruction is executed by the processor, it implements the adsorption refrigeration system monitoring method according to any one of claims 1 to 8.

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