CN108627305B - Air conditioning system and method for detecting air conditioning system tightness - Google Patents
Air conditioning system and method for detecting air conditioning system tightness Download PDFInfo
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- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
Abstract
The invention discloses a method for detecting the sealing performance of an air conditioning system and the air conditioning system, and belongs to the technical field of air conditioners. The air conditioning system includes: an electrochemical compressor, and first and second metal hydride heat exchangers connected to respective ports of the electrochemical compressor, the method comprising: when the set inspection condition is determined to be met, acquiring the current pH value of the metal hydride in the current metal hydride heat exchanger; and when the current pH value is not matched with the stored pH value corresponding to the current metal hydride heat exchanger, determining that water vapor leaks into a hydrogen channel of the air conditioning system, wherein the hydrogen channel is a transmission channel for hydrogen to move from the first metal hydride heat exchanger to the second metal hydride heat exchanger through the electrochemical compressor after the electrochemical compressor applies voltage.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a method for detecting the sealing performance of an air conditioning system and the air conditioning system.
Background
With the improvement of living standard, air conditioners have been increasingly used. At present, most of air conditioners, especially household air conditioners, adopt a vapor compression type refrigeration method, wherein a refrigerant in the refrigeration method is fluoride, and the release or leakage of the refrigerant causes harm to the environment, so that fluorine-free air conditioners are gradually developed and used.
Currently, a fluorine-free air conditioning system may include: the electrochemical compressor and the two ports of the electrochemical compressor are respectively connected with the first metal hydride heat exchanger and the second metal hydride heat exchanger, so that when positive voltage is applied to the electrochemical compression, hydrogen can be driven to move from the first metal hydride heat exchanger to the second metal hydride heat exchanger, meanwhile, the second metal hydride heat exchanger absorbing the hydrogen releases the heat outwards, the first metal hydride heat exchanger releasing the hydrogen absorbs the heat outwards, and therefore the metal hydride heat exchanger absorbing the heat is utilized to refrigerate the indoor environment, the purpose of reducing the room temperature is achieved, and the refrigeration effect similar to that of a traditional air conditioning system is achieved.
As the hydrogen moves from the first metal hydride heat exchanger, through the electrochemical compressor, to the second metal hydride heat exchanger, a hydrogen gas channel for hydrogen gas transport can be formed. Generally, a hydrogen passage is sealed, however, the problem of poor sealing is easily caused at a connection port of an electrochemical compressor or other parts of the hydrogen passage, and some water vapor is carried in the hydrogen passage, so that the water vapor can react with metal hydride after entering a metal hydride heat exchanger along with hydrogen to generate alkaline substances and hydrogen, which causes the metal hydride to deteriorate, so that the amount of usable metal hydride stored in the metal hydride heat exchanger is reduced, and therefore, the detection of the sealing performance of an air conditioning system is very important for ensuring the service life of the metal hydride.
Disclosure of Invention
The embodiment of the invention provides a method for detecting air conditioning system tightness and an air conditioning system. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to a first aspect of embodiments of the present invention, there is provided a method for detecting air conditioning system tightness, the air conditioning system including: an electrochemical compressor, and first and second metal hydride heat exchangers connected to two ports of the electrochemical compressor, respectively, the method comprising:
when the set check condition is determined to be met, acquiring a current pH value of the metal hydride in a current metal hydride heat exchanger, wherein the current metal hydride heat exchanger comprises a first metal hydride heat exchanger or a second metal hydride heat exchanger;
and when the current pH value is not matched with the stored pH value corresponding to the current metal hydride heat exchanger, determining that water vapor leaks into a hydrogen channel of the air conditioning system, wherein the hydrogen channel is a transmission channel for hydrogen to move from the first metal hydride heat exchanger to the second metal hydride heat exchanger through the electrochemical compressor after the electrochemical compressor applies voltage.
In an embodiment of the present invention, the determining that the set checking condition is satisfied includes:
obtaining a current sub-value of the applied voltage of the electrochemical compressor, wherein the applied voltage of the electrochemical compressor causes hydrogen gas to move from the first metal hydride heat exchanger to the second metal hydride heat exchanger through the hydrogen passage;
and when the second metal hydride heat exchanger finishes the hydrogen absorption at this time and the obtained current numerical value is matched with a set value, determining that the set inspection condition is met.
In an embodiment of the present invention, the determining that the set checking condition is satisfied includes:
acquiring the current running time of the air conditioning system;
and when the current running time is matched with the set running time, determining that a set checking condition is met.
In an embodiment of the present invention, after determining that water vapor leaks into the hydrogen channel of the air conditioning system, the method further includes:
determining the current pH value as the stored pH value.
In an embodiment of the present invention, the method further includes:
and when the air conditioning system is started to operate, configuring and storing the stored pH value.
According to a second aspect of embodiments of the present invention, there is provided an air conditioning system including: an electrochemical compressor, and a first metal hydride heat exchanger and a second metal hydride heat exchanger connected to two ports of the electrochemical compressor, respectively, further comprising:
a processor for obtaining a current pH value of a metal hydride in a current metal hydride heat exchanger when it is determined that a set inspection condition is satisfied, wherein the current metal hydride heat exchanger comprises a first metal hydride heat exchanger or a second metal hydride heat exchanger; and when the current pH value is not matched with the stored pH value corresponding to the current metal hydride heat exchanger, determining that water vapor leaks into a hydrogen channel of the air conditioning system, wherein the hydrogen channel is a transmission channel for hydrogen to move from the first metal hydride heat exchanger to the second metal hydride heat exchanger through the electrochemical compressor after the electrochemical compressor applies voltage.
In an embodiment of the present invention, the processor is further configured to obtain a current value of the applied voltage of the electrochemical compressor, where the electrochemical compressor applies a voltage for one time, so that hydrogen moves from the first metal hydride heat exchanger to the second metal hydride heat exchanger through the hydrogen passage, and when the second metal hydride heat exchanger completes the current hydrogen absorption and the obtained current value matches a set value, it is determined that a set check condition is satisfied.
In an embodiment of the present invention, the processor is further configured to obtain a current operation time of the air conditioning system, and determine that a set check condition is satisfied when the current operation time matches a set operation time.
In an embodiment of the present invention, the processor is further configured to determine the current ph value as the stored ph value.
In an embodiment of the present invention, the processor is further configured to configure and store the stored ph value when the air conditioning system starts to operate.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, if water vapor leaks from the hydrogen channel, the metal hydride in the metal hydride heat exchanger reacts with the water vapor in the hydrogen, so that the conductive metal hydride is changed, and the pH value of the metal hydride in the metal hydride heat exchanger is changed, therefore, whether the water vapor exists in the hydrogen channel can be determined according to the change of the pH value of the metal hydride, and whether the air-conditioning system has good tightness is detected, so that the service life of the metal hydride in the air-conditioning system is ensured and prolonged.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a block diagram illustrating a configuration of an air conditioning system according to an exemplary embodiment;
FIG. 2 is a schematic flow diagram illustrating a method for detecting air conditioning system hermeticity in accordance with an exemplary embodiment;
FIG. 3 is a schematic flow diagram illustrating a method for detecting air conditioning system hermeticity in accordance with an exemplary embodiment;
FIG. 4 is a schematic flow diagram illustrating a method for detecting air conditioning system hermeticity in accordance with an exemplary embodiment;
FIG. 5 is a block diagram illustrating the construction of an air conditioning system according to an exemplary embodiment;
fig. 6 is a block diagram illustrating an air conditioning system according to an exemplary embodiment.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the structures, products and the like disclosed by the embodiments, the description is relatively simple because the structures, the products and the like correspond to the parts disclosed by the embodiments, and the relevant parts can be just described by referring to the method part.
Fig. 1 is a block diagram illustrating an air conditioning system according to an exemplary embodiment. As shown in fig. 1, the air conditioning system includes: an electrochemical compressor 100, a first metal hydride heat exchanger 200, and a second metal hydride heat exchanger 300, wherein a first end 110 of the electrochemical compressor 100 is coupled to the first metal hydride heat exchanger 200 and a second end 120 of the electrochemical compressor 100 is coupled to the second metal hydride heat exchanger 300.
Thus, the electrochemical compressor 100 can cause one metal hydride heat exchanger to release hydrogen while the other metal hydride heat exchanger absorbs hydrogen when a voltage is applied to the first metal hydride heat exchanger 200 and the second metal hydride heat exchanger 300 through the first end 110 and the second end 120. For example: the first end 110 is an anode and the second end 120 is a cathode, such that a positive voltage is applied to the electrochemical compressor 100 once to move hydrogen gas through the electrochemical compressor 100 from the first metal hydride heat exchanger 200 to the second metal hydride heat exchanger 300. Thus, the electrochemical compressor 100 can form a hydrogen gas passage for hydrogen gas transmission with the first metal hydride heat exchanger 200 and the second metal hydride heat exchanger 300.
The first metal hydride heat exchanger 200 for releasing hydrogen absorbs heat from the outside, and the second metal hydride heat exchanger 300 for absorbing hydrogen absorbs heat from the outside, so that the indoor environment can be refrigerated by using the heat-absorbing metal hydride heat exchanger, thereby achieving the purpose of reducing the room temperature.
Typically, the hydrogen gas passages are sealed, however, the connection ports of the electrochemical compressor or other portions of the hydrogen gas passages are susceptible to poor sealing, some water vapor may enter the hydrogen gas passages, and the metal hydride in the metal hydride heat exchanger may react with the water vapor accompanying the hydrogen gas, causing a change in the conductive metal hydride and changing the ph of the metal hydride in the metal hydride heat exchanger. Therefore, in the embodiment of the invention, whether the hydrogen channel has water vapor or not can be determined according to the change of the pH value of the metal hydride, so that whether the air-conditioning system has good sealing performance or not can be detected.
Fig. 2 is a flowchart illustrating an air conditioning system tightness detection method according to an exemplary embodiment, where as shown in fig. 2, the air conditioning system tightness detection process includes:
step 201: when the set inspection condition is determined to be met, acquiring the current pH value of the metal hydride in the current metal hydride heat exchanger;
step 202: and when the current pH value is not matched with the stored pH value corresponding to the current metal hydride heat exchanger, determining that water vapor leaks into a hydrogen channel of the air conditioning system.
In an embodiment of the present invention, an air conditioning system includes: an electrochemical compressor, and a first metal hydride heat exchanger and a second metal hydride heat exchanger connected to two ports of the electrochemical compressor, respectively. Thus, the air conditioning system has two metal hydride heat exchangers, and the pH value of the metal hydride in any one metal hydride heat exchanger can be checked. Thus, current metal hydride heat exchangers include either a first metal hydride heat exchanger or a second metal hydride heat exchanger.
In step 201, optionally, since the electrochemical compressor applies a voltage every time the voltage is applied, the hydrogen gas can move from one metal hydride heat exchanger to another metal hydride heat exchanger through the hydrogen passage, and therefore, the checking condition can be set according to the number of times the voltage is applied, and thus, in this embodiment, determining that the set checking condition is satisfied includes: obtaining a current sub-value of the applied voltage of the electrochemical compressor, wherein the applied voltage of the electrochemical compressor causes the hydrogen gas to move from the first metal hydride heat exchanger to the second metal hydride heat exchanger through the hydrogen passage; and when the second metal hydride heat exchanger finishes the hydrogen absorption, and the obtained current numerical value is matched with the set value, determining that the set inspection condition is met.
For example: the set values include: 1. 11, 21, 31 …, so that if the electrochemical compressor applies voltage for the first time and the hydrogen exchange process is completed, the current value can be matched with the set value, because the set value includes: 1. 11, 21, 31 …, and the current value is included in the set value, that is, when the obtained current value matches the set value, it is determined that the set check condition is satisfied, so that the current ph value of the metal hydride in the current metal hydride heat exchanger can be further obtained. Or, the electrochemical compressor applies the voltage for the twenty first time, and after the hydrogen exchange process is completed, the set value includes the current value 21, that is, when the obtained current value matches with the set value, it is determined that the set check condition is met. And the electrochemical compressor applies voltage for the twenty third time, and after the hydrogen exchange process is finished, the set value does not comprise the current numerical value 23, namely when the obtained current numerical value is not matched with the set value, the situation that the set check condition is not met is determined.
When the hydrogen moves from the first metal hydride heat exchanger to the second metal hydride heat exchanger through the hydrogen passage, whether the current hydrogen exchange process is finished can be determined by determining whether the second metal hydride heat exchanger finishes the current hydrogen absorption. The process of determining whether the second metal hydride heat exchanger completes the hydrogen absorption at this time is various, and for example, the process may be determined according to the comparison between the amount of hydrogen released by the first metal hydride heat exchanger and the amount of hydrogen absorbed by the second metal hydride heat exchanger, or may be determined according to the hydrogen content in the metal hydride heat exchanger, and the specific process will not be described again.
It can be seen that the current pH value of the metal hydride in the current metal hydride heat exchanger can be obtained by N hydrogen exchange processes. N may be an unspecified natural integer. For example: 5. 8, 10, 20, etc.
Optionally, the checking condition may be set according to the running time of the air conditioning system, that is, meeting the set checking condition includes: acquiring the current running time of the current air conditioning system; when the current operation time matches the set operation time, it is determined that the set check condition is satisfied.
For example: setting the runtime includes: and …, namely 0 minute, 10 minutes and 20 minutes, so that when the air conditioner is started to run, the current running time is 0 minute, and the current running time is matched with the set running time, and the set checking condition can be determined to be met. And the current running time is 8 minutes, and the current running time is not matched with the set running time, so that the set checking condition can be determined not to be met. Of course, the current operation time is 20 minutes, and the set operation time is matched, so that it can be determined that the set inspection condition is satisfied.
It can be seen that the determination of whether to perform the acquisition of the current ph value of the metal hydride in the current metal hydride heat exchanger can be made at intervals of M minutes of run time. M may be a natural integer set. For example: 3. 5, 8, 10, 15, etc.
The method for obtaining the current PH value of the metal hydride in the current metal hydride heat exchanger may be various, for example, a PH meter or a PH detector may be used to obtain the current PH value of the metal hydride in the current metal hydride heat exchanger. For example: the detection terminal of the pH value detection device is placed in the current metal hydride heat exchanger, so that the current pH value of the metal hydride in the current metal hydride heat exchanger can be obtained through the pH value detection device.
Because the problem of poor sealing is easy to occur at the connecting position of the electrochemical compressor and the metal hydride heat exchanger, the detection terminal of the pH value detection device can be close to the connecting port of the metal hydride heat exchanger, and thus, the sealing detection speed of the air conditioning system can be improved.
In step 202, the stored ph value corresponding to the current metal hydride heat exchanger is saved, such that the current ph value is compared to the stored ph value, and if the stored ph value and the stored ph value are not matched, it can be determined that water vapor leaks from the hydrogen channel of the air conditioning system. Wherein, the hydrogen channel is a transmission channel for hydrogen to move from the first metal hydride heat exchanger to the second metal hydride heat exchanger through the electrochemical compressor after the electrochemical compressor applies voltage.
And when the current pH value is not equal to the stored pH value, determining that the current pH value is not matched with the stored pH value. Alternatively, when the relative difference between the current ph value and the stored ph value is greater than the set difference, it may be determined that the two are not matched.
For example: the pH value is marked by the PH value, if the current pH value obtained by the PH meter is 8.5, and the stored pH value corresponding to the current metal hydride heat exchanger is 8.1, the pH value of the metal hydride in the current metal hydride heat exchanger can be determined to be changed, and further the water vapor leaked into a hydrogen channel of the air-conditioning system can be determined. Or, the current pH value obtained by the PH meter is 9.5, the stored pH value corresponding to the current metal hydride heat exchanger is 9.2, and the relative difference between the two is 0.3 and is greater than the set difference of 0.2, so that the change of the pH value of the metal hydride in the current metal hydride heat exchanger can be determined, and the water vapor leaked into the hydrogen channel of the air-conditioning system can be further determined.
Of course, if the current ph value matches the stored ph value corresponding to the current metal hydride heat exchanger, that is, the ph value of the metal hydride in the current metal hydride heat exchanger is not changed, it can be determined that no water vapor leaks into the hydrogen channel of the air conditioning system, that is, the air conditioning system has good sealing performance. When the current pH value is not matched with the stored pH value corresponding to the current metal hydride heat exchanger, the air-conditioning system can be subjected to sealing maintenance after water vapor is leaked into a hydrogen channel of the air-conditioning system, so that the probability of the water vapor entering the metal hydride heat exchanger is reduced, the probability of metal hydride deterioration is reduced, the service life of the metal hydride is ensured and prolonged, and the service life of the air conditioner is further prolonged.
Optionally, after determining that water vapor leaks into the hydrogen passage of the air conditioning system, the method further includes: and determining the current pH value as a storage pH value.
Therefore, the stored pH value can be updated in real time, the air-conditioning system tightness detection accuracy is improved, and the water vapor leaked into the hydrogen channel of the air-conditioning system can be determined as long as the pH values acquired twice are not matched. Therefore, the air conditioner can be maintained in time, and the service life and the safety of the air conditioner system are further improved.
Therefore, when the air conditioning system is started, the current pH value of the metal hydride in the current metal hydride heat exchanger may be acquired, and the stored pH value may not exist, at this time, the current pH value may be updated to the stored pH value corresponding to the current metal hydride heat exchanger without comparison, and stored, and the detection process is ended. Therefore, in the next air conditioning system tightness detection process, after the current pH value of the metal hydride in the current metal hydride heat exchanger is obtained, the current pH value can be compared with the stored pH value. Therefore, optionally, before determining that the water vapor is leaked into the hydrogen channel of the air conditioning system when the current ph value does not match the stored ph value corresponding to the current metal hydride heat exchanger, the method further includes: when it is determined that a stored ph value corresponding to the current metal hydride heat exchanger is stored, matching the current ph value with the stored ph value. And when the stored pH value corresponding to the current metal hydride heat exchanger is determined not to be stored, determining the current pH value as the stored pH value for storage, and ending the process.
Or, optionally, when the air conditioning system starts to operate, the stored ph value is configured as a fixed ph value. In the air conditioning system tightness detection process of the embodiment, after the current ph value is matched with the stored ph value, the current ph value can be updated to the stored ph value and stored.
Of course, the stored pH value can also be configured to be a fixed value for storage. For example: and determining the initial pH value of the metal hydride in the current metal hydride heat exchanger in the initial state as a stored pH value, so that the current pH value obtained each time is compared with the fixed stored pH value, thereby determining whether the metal hydride in the current metal hydride heat exchanger is deteriorated and further determining whether water vapor leaks into a hydrogen channel of the air conditioning system.
Therefore, optionally, the method for detecting the air conditioning system tightness may further include: and when the air conditioning system starts to operate, configuring and storing the pH value.
The following operational flows are grouped into specific embodiments to illustrate the methods provided by the embodiments of the present disclosure.
Fig. 3 is a flowchart illustrating an air conditioning system tightness detection method according to an exemplary embodiment. In this embodiment, the air conditioning system can be as shown in fig. 1, and the current metal hydride heat exchanger is the second metal hydride heat exchanger 300, wherein the metal hydride in the metal hydride heat exchanger can be RH. And a stored ph value corresponding to the current metal hydride heat exchanger is pre-stored, where the stored ph value is configurable to be a first ph value of the metal hydride in the current metal hydride heat exchanger in the initial state.
As shown in fig. 3, the process of detecting the air conditioning system tightness includes:
step 301: the current value of the applied voltage of the electrochemical compressor 100 is obtained.
Once the electrochemical compressor 100 applies a forward voltage, hydrogen gas can be caused to move through the electrochemical compressor 100 from the first metal hydride heat exchanger 200 to the second metal hydride heat exchanger 300. Thus, the electrochemical compressor 100 can form a hydrogen gas passage for hydrogen gas transmission with the first metal hydride heat exchanger 200 and the second metal hydride heat exchanger 300.
Step 302: is it determined whether the second metal hydride heat exchanger 300 has completed this hydrogen absorption? If yes, go to step 303, otherwise, go back to step 302.
After the process of one hydrogen gas transmission is completed, step 303 may be executed, otherwise, step 302 may be returned to.
Step 303: is it determined whether the acquired current time value matches the set value? If yes, go to step 304, otherwise, this process is ended.
For example: the set values include: 5. 10, 15 …, so that if the current value is 5 times, 10 times, 15 times, etc., it can be determined that the current value is matched, step 304 is executed, otherwise, the process is ended.
Step 304: the current ph value of the metal hydride in the current metal hydride heat exchanger 300 is obtained.
In this embodiment, the PH value is a PH value, and the detection port of the PH meter may be located at the connection port of the second metal hydride heat exchanger 300, so that the current PH value of the metal hydride in the current metal hydride heat exchanger 300 may be obtained by the PH meter. For example: the PH is located in the hydrogen channel and the detection port of the PH meter can be located at the connection port of the second metal hydride heat exchanger 300 so that the current PH value of the metal hydride in the current metal hydride heat exchanger 300 can be obtained by wireless transmission.
Step 305: is it determined whether the current ph value matches the stored first ph value corresponding to the current metal hydride heat exchanger 300? If yes, go to step 306, otherwise go to step 307.
Here, the ph value is stored as a fixed first ph value, so that if the current ph value matches the stored first ph value, step 306 is executed, otherwise, step 307 is executed.
Since the metal hydride in current metal hydride heat exchangers can react with water, the ph changes. Here, the metal hydride is RH, and RH + H2O＝ROH+H2Thus, after the metal hydride reacts with water, an alkaline substance and hydrogen gas are generated, so that the ph value of the metal hydride in the current metal hydride heat exchanger is increased. Therefore, here, if the current ph value is greater than the saved first ph value, it may be determined that the two values do not match, step 307 is performed, otherwise, step 306 is performed.
Step 306: it is determined that no water vapor is leaked in the hydrogen passage of the air conditioning system. The process is finished.
And matching the current pH value with the stored first pH value, namely determining that the metal hydride in the current metal hydride heat exchanger is not deteriorated and determining that no water vapor leaks into a hydrogen channel of the air-conditioning system.
Step 307: and determining that water vapor leaks into a hydrogen channel of the air conditioning system. The process is finished.
The current pH value is not matched with the stored first pH value, so that the change of the metal hydride in the current metal hydride heat exchanger can be determined, and the water vapor leaked into a hydrogen channel of the air conditioning system can be further determined.
It can be seen that in this embodiment, if the current ph value is not matched with the stored first ph value, the leak of water vapor in the hydrogen channel of the air conditioning system is determined, and then the leak of water vapor can be maintained, so that the probability of water vapor entering the metal hydride heat exchanger is reduced, the probability of metal hydride deterioration is reduced, the service life of the metal hydride is ensured and prolonged, and the service life and safety of the air conditioner are further prolonged.
Fig. 4 is a flowchart illustrating an air conditioning system tightness detection method according to an exemplary embodiment. In this embodiment, the air conditioning system may be as shown in fig. 1. The stored ph value corresponding to the current metal hydride heat exchanger may be saved when the air conditioning system is started up.
As shown in fig. 4, the process of detecting the air conditioning system tightness includes:
step 401: and acquiring the current running time of the air conditioning system.
Step 402: is it determined whether the current operating time matches the set operating time? If yes, go to step 403, otherwise, this process is ended.
Setting the runtime includes: 10 minutes, 20 minutes, 30 minutes …, so that if the current running time is 10 minutes, 20 minutes, 30 minutes, etc., step 304 can be executed, otherwise, the process ends.
Step 403: and acquiring the current pH value of the metal hydride in the current metal hydride heat exchanger.
Step 404: is it determined whether the current ph value matches the stored ph value corresponding to the current metal hydride heat exchanger? If yes, go to step 405, otherwise, go to step 406.
Here, if the relative difference between the current ph value and the stored ph value is less than a set value, for example: 0.1, it can be determined that the two match, go to step 405, otherwise, go to step 406.
Step 405: it is determined that no water vapor is leaked into the hydrogen passage of the air conditioning system, and it proceeds to step 407.
The two are matched, so that when the metal hydride of the current metal hydride heat exchanger is not deteriorated, the situation that water vapor does not leak into a hydrogen channel of the air-conditioning system can be determined.
Step 406: it is determined that water vapor is leaked into the hydrogen passage of the air conditioning system, and the process proceeds to step 407.
If the two are not matched, the change of the metal hydride of the current metal hydride heat exchanger can be determined, and the water vapor leaked into the hydrogen channel of the air conditioning system can be further determined.
Step 407: and determining the current pH value as a storage pH value.
Therefore, the stored pH value can be updated in time, and the fault tolerance of the process can be better ensured. The stored pH value can be updated in real time, so that the air-conditioning system tightness detection accuracy is improved, and the water vapor leaked into the hydrogen channel of the air-conditioning system can be determined as long as the pH values obtained twice are not matched. Therefore, the air conditioner can be maintained in time, and the service life and the safety of the air conditioner system are further improved.
Therefore, whether water vapor exists in the hydrogen channel can be determined according to the change of the pH value of the metal hydride in the metal hydride heat exchanger, and therefore whether the air-conditioning system is good in sealing performance is detected, and the service life of the metal hydride in the air-conditioning system is ensured and prolonged.
According to the air conditioning system tightness detection process, an air conditioning system can be constructed.
Fig. 5 is a block diagram illustrating an air conditioning system according to an exemplary embodiment. As shown in fig. 5, the air conditioning system includes: an electrochemical compressor 100, a first metal hydride heat exchanger 200, a second metal hydride heat exchanger 300, and a processor 500.
Wherein the electrochemical compressor 100 is connected to the first metal hydride heat exchanger 200 and the second metal hydride heat exchanger 300, respectively. Also, the electrochemical compressor 100 may constitute a hydrogen passage for hydrogen gas transmission with the first metal hydride heat exchanger 200 and the second metal hydride heat exchanger 300.
A processor 500 configured to obtain a current ph value of the metal hydride in the current metal hydride heat exchanger when it is determined that the set check condition is satisfied, wherein the current metal hydride heat exchanger includes the first metal hydride heat exchanger 200 or the second metal hydride heat exchanger 300; and determining that water vapor leaks into a hydrogen channel of the air conditioning system when the current pH value does not match a stored pH value corresponding to the current metal hydride heat exchanger, wherein the hydrogen channel is a transmission channel through which hydrogen moves from the first metal hydride heat exchanger 200 to the second metal hydride heat exchanger 300 through the electrochemical compressor 100 after the electrochemical compressor 100 applies a voltage.
Optionally, the processor 500 is further configured to obtain a current value of the voltage applied by the electrochemical compressor 100, where the electrochemical compressor applies the voltage once, so that the hydrogen gas moves from the first metal hydride heat exchanger 200 to the second metal hydride heat exchanger 300 through the hydrogen passage, and when the second metal hydride heat exchanger 300 completes the current hydrogen absorption and the obtained current value matches the set value, it is determined that the set check condition is satisfied.
Optionally, the processor 500 is further configured to obtain a current operation time of the air conditioning system, and determine that the set check condition is satisfied when the current operation time matches the set operation time.
The processor 500 may be electrically connected to the first metal hydride heat exchanger 200 and the second metal hydride heat exchanger 300, respectively, so that the process of obtaining the current PH value of the metal hydride in the current metal hydride heat exchanger may be various, for example, by a PH meter or a PH detector, so as to obtain the current PH value of the metal hydride in the current metal hydride heat exchanger. For example: the detection terminal of the ph detection device is placed in the current metal hydride heat exchanger, that is, the processor 500 may obtain the current ph value of the metal hydride in the current metal hydride heat exchanger through the communication of the ph detection device.
Because the problem of poor sealing is easy to occur at the connecting position of the electrochemical compressor and the metal hydride heat exchanger, the detection terminal of the pH value detection device can be close to the connecting port of the metal hydride heat exchanger, and thus, the sealing detection speed of the air conditioning system can be improved.
In an embodiment of the present invention, the processor 500 is further configured to determine the current ph value as the stored ph value. Therefore, the stored pH value can be updated in real time, and the fault tolerance and the detection accuracy of the air conditioning system are improved.
Optionally, the processor 500 is further configured to store and store the ph value when the air conditioning system is started.
Therefore, in the embodiment of the invention, whether the hydrogen channel has water vapor or not can be determined according to the change of the pH value of the metal hydride in the metal hydride heat exchanger, so that whether the air-conditioning system has good sealing performance or not can be detected. After the water vapor is leaked into the hydrogen channel of the air conditioning system, the air conditioning system can be subjected to tightness maintenance, so that the probability of the water vapor entering the metal hydride heat exchanger is reduced, the probability of metal hydride deterioration is reduced, the service life of the metal hydride is ensured and prolonged, and the service life of the air conditioner is further prolonged.
The following exemplifies an air conditioning system provided by an embodiment of the present disclosure.
Fig. 6 is a block diagram illustrating an air conditioning system according to an exemplary embodiment. As shown in fig. 6, the air conditioning system includes: the electrochemical compressor 100, the first metal hydride heat exchanger 200, the second metal hydride heat exchanger 300, the ph detection device 400 and the processor 500.
Wherein the electrochemical compressor 100 is connected to the first metal hydride heat exchanger 200 and the second metal hydride heat exchanger 300, respectively. Also, the electrochemical compressor 100 may constitute a hydrogen passage for hydrogen gas transmission with the first metal hydride heat exchanger 200 and the second metal hydride heat exchanger 300.
The ph detection device 400 is located in the hydrogen passage, wherein a detection terminal of the ph detection device 400 can contact with the second metal hydride heat exchanger 300, and the processor 500 can be in communication with the ph detection device 400 to obtain the ph value of the metal hydride in the second metal hydride heat exchanger 300.
When it is determined that the set check condition is satisfied, the processor 500 may obtain a current ph value of the metal hydride in the second metal hydride heat exchanger 300, and determine that water vapor leaks into the hydrogen passage of the air conditioning system when the current ph value does not match the stored ph value corresponding to the second metal hydride heat exchanger 300.
Alternatively, the processor 500 may obtain a current value of the applied voltage of the electrochemical compressor 100, wherein the electrochemical compressor applies the voltage once to move hydrogen gas from the first metal hydride heat exchanger 200 to the second metal hydride heat exchanger 300 through the hydrogen passage; and when the second metal hydride heat exchanger 300 completes the hydrogen absorption and the obtained current numerical value matches the set value, determining that the set check condition is met, so as to obtain the current pH value of the metal hydride in the second metal hydride heat exchanger 300.
Optionally, the processor 500 may obtain a current operation time of the air conditioning system; when the current operating time matches the set operating time, it is determined that the set check condition is satisfied, so that the current ph value of the metal hydride in the second metal hydride heat exchanger 300 can be acquired.
Of course, the processor 500 may also determine the current ph value as the stored ph value.
Optionally, the processor 500 may further configure and store the ph value when the air conditioning system starts to operate.
Of course, the present invention is not so limited and the current pH of the metal hydride in the first metal hydride heat exchanger can also be detected, as described above.
Therefore, in the embodiment of the invention, whether the hydrogen channel has water vapor or not can be determined according to the change of the pH value of the metal hydride in the metal hydride heat exchanger, so that whether the air-conditioning system has good sealing performance or not can be detected. After the water vapor is leaked into the hydrogen channel of the air conditioning system, the air conditioning system can be subjected to tightness maintenance, so that the probability of the water vapor entering the metal hydride heat exchanger is reduced, the probability of metal hydride deterioration is reduced, the service life of the metal hydride is ensured and prolonged, and the service life of the air conditioner is further prolonged.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It is to be understood that the present invention is not limited to the procedures and structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. A method for detecting air conditioning system tightness is characterized in that the air conditioning system comprises: an electrochemical compressor, and first and second metal hydride heat exchangers connected to two ports of the electrochemical compressor, respectively, the method comprising:
when the set check condition is determined to be met, acquiring a current pH value of the metal hydride in a current metal hydride heat exchanger, wherein the current metal hydride heat exchanger comprises a first metal hydride heat exchanger or a second metal hydride heat exchanger;
and when the current pH value is not matched with the stored pH value corresponding to the current metal hydride heat exchanger, determining that water vapor leaks into a hydrogen channel of the air conditioning system, wherein the hydrogen channel is a transmission channel for hydrogen to move from the first metal hydride heat exchanger to the second metal hydride heat exchanger through the electrochemical compressor after the electrochemical compressor applies voltage.
2. The method of claim 1, wherein the determining that a set check condition is satisfied comprises:
obtaining a current sub-value of the applied voltage of the electrochemical compressor, wherein the applied voltage of the electrochemical compressor causes hydrogen gas to move from the first metal hydride heat exchanger to the second metal hydride heat exchanger through the hydrogen passage;
and when the second metal hydride heat exchanger finishes the hydrogen absorption at this time and the obtained current numerical value is matched with a set value, determining that the set inspection condition is met.
3. The method of claim 1, wherein the satisfying a set check condition comprises:
acquiring the current running time of the air conditioning system;
and when the current running time is matched with the set running time, determining that a set checking condition is met.
4. The method of claim 1, wherein after determining that moisture is leaking into a hydrogen gas passage of the air conditioning system, further comprising:
and determining the current pH value as the stored pH value.
5. The method of claim 1 or 4, wherein the method further comprises:
and when the air conditioning system is started to operate, configuring and storing the stored pH value.
6. An air conditioning system, comprising: an electrochemical compressor, and a first metal hydride heat exchanger and a second metal hydride heat exchanger connected to two ports of the electrochemical compressor, respectively, further comprising:
a processor for obtaining a current pH value of a metal hydride in a current metal hydride heat exchanger when it is determined that a set inspection condition is satisfied, wherein the current metal hydride heat exchanger comprises a first metal hydride heat exchanger or a second metal hydride heat exchanger; and when the current pH value is not matched with the stored pH value corresponding to the current metal hydride heat exchanger, determining that water vapor leaks into a hydrogen channel of the air conditioning system, wherein the hydrogen channel is a transmission channel for hydrogen to move from the first metal hydride heat exchanger to the second metal hydride heat exchanger through the electrochemical compressor after the electrochemical compressor applies voltage.
7. The air conditioning system of claim 6,
the processor is further configured to obtain a current value of the applied voltage of the electrochemical compressor, where the electrochemical compressor applies a voltage for one time, so that hydrogen moves from the first metal hydride heat exchanger to the second metal hydride heat exchanger through the hydrogen passage, and when the second metal hydride heat exchanger completes the current hydrogen absorption and the obtained current value matches a set value, it is determined that a set check condition is satisfied.
8. The air conditioning system of claim 6,
the processor is further configured to obtain a current operation time of the air conditioning system, and determine that a set check condition is satisfied when the current operation time matches a set operation time.
9. The air conditioning system of claim 6,
the processor is further configured to determine the current pH value as the stored pH value.
10. Air conditioning system according to claim 6 or 9,
and the processor is also used for configuring and storing the stored pH value when the air conditioning system is started to operate.
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Effective date of registration: 20200910 Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Co-patentee after: QINGDAO HAIER (JIAOZHOU) AIR CONDITIONER Co.,Ltd. Patentee after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. |
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Effective date of registration: 20201103 Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Patentee after: QINGDAO HAIER (JIAOZHOU) AIR CONDITIONER Co.,Ltd. Patentee after: Haier Zhijia Co.,Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Patentee before: QINGDAO HAIER (JIAOZHOU) AIR CONDITIONER Co.,Ltd. |
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