Oxygen generation system control method, oxygen generation system and air conditioner

Abstract

The invention provides an oxygen generation system control method, an oxygen generation system and an air conditioner. The oxygen generation system control method comprises the following steps: acquiring air pressure parameter information at a plurality of to-be-detected positions; performing pressure relief operation on the to-be-detected position according to the air pressure parameter information so as to adjust the air pressure value of the to-be-detected position; wherein the plurality of to-be-detected positions comprise a first to-be-detected position, a second to-be-detected position and a third to-be-detected position, the first to-be-detected position is located between a gas supply device of the oxygen generation system and a gas supply silencer of the oxygen generation system, and the second to-be-detected position is located between the gas supply silencer and an oxygen generation device of the oxygen generation system; and the third to-be-detected position is located between the oxygen generation device and an exhaust silencer of the oxygen generation system. The air conditioner oxygen generation system effectively solves the problems that in the prior art, an air conditioner oxygen generation system is low in operation stability and short in service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to an oxygen generation system control method, an oxygen generation system and an air conditioner. BACKGROUND

[0002] At present, an oxygen generation air conditioner usually has an oxygen generation system built-in, and the oxygen-rich gas generated by the oxygen generation system from the air is delivered to the indoor during the operation of the air conditioner to adjust the oxygen content of the indoor air and improve the user experience. The pressure swing adsorption (PSA) oxygen generation system based on the principle of pressure swing adsorption is the most commonly used high-efficiency oxygen separation system in the prior art of oxygen generation air conditioners. In this system, the pressure of compressed air and the pressure fluctuation range will directly affect the oxygen separation efficiency and the service life of the equipment.

[0003] In the prior art, only one pressure sensor for detecting the internal gas pressure value of the system is usually provided in the pressure swing adsorption (PSA) oxygen generation system, and the air supply pressure of the air compressor is adjusted according to the detection value of the pressure sensor to ensure that the overall gas pressure in the pressure swing adsorption (PSA) oxygen generation system is appropriate and the pressure fluctuation range is relatively stable, thereby improving the operation stability (stabilizing oxygen generation) of the pressure swing adsorption (PSA) oxygen generation system and prolonging the service life of the pressure swing adsorption (PSA) oxygen generation system.

[0004] However, the above-mentioned traditional pressure control method is actually unreliable and prone to local overpressure risk. Specifically, if the oxygen generation system has problems such as pipeline blockage, silencer blockage, and valve jamming, due to the obstruction of the internal devices of the oxygen generation system to the gas and the hysteresis of the gas pressure change, the pressure sensor cannot immediately detect the pressure change at the overpressure position. If the air compressor still increases its air supply pressure at this time, it will cause the molecular sieve in the oxygen generation tower to be pulverized or the oxygen generation tower to be deformed, thereby affecting the operation stability of the oxygen generation system, and in severe cases, the molecular sieve and the oxygen generation tower will be completely damaged, which will seriously affect the service life of the oxygen generation system. SUMMARY

[0005] The main purpose of the present application is to provide an oxygen generation system control method, an oxygen generation system and an air conditioner to solve the problem of low operation stability and short service life of the oxygen generation system of the air conditioner in the prior art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present application, an oxygen generation system control method is provided, comprising:

[0007] obtaining gas pressure parameter information at a plurality of to-be-detected positions;

[0008] performing a pressure relief operation on the to-be-detected positions according to the gas pressure parameter information to adjust the gas pressure value at the to-be-detected positions;

[0009] The plurality of to-be-detected positions include a first to-be-detected position, a second to-be-detected position, and a third to-be-detected position. The first to-be-detected position is located between a gas supply device of the oxygen production system and a gas supply silencer of the oxygen production system. The second to-be-detected position is located between the gas supply silencer and an oxygen production device of the oxygen production system. The third to-be-detected position is located between the oxygen production device and an exhaust silencer of the oxygen production system.

[0010] Further, the oxygen production system control method further includes:

[0011] According to the gas pressure parameter information at the second to-be-detected position, the switching cycle time of the switching valve of the oxygen production device is adjusted.

[0012] Further, the gas pressure parameter information includes a gas pressure change rate value. According to the gas pressure parameter information at the second to-be-detected position, the method of adjusting the switching cycle time of the switching valve of the oxygen production device includes performing the following target operation:

[0013] determining the size relationship between the gas pressure change rate value at the second to-be-detected position and a preset gas pressure change rate range;

[0014] if the gas pressure change rate at the second to-be-detected position is greater than or equal to the maximum value of the preset gas pressure change rate range, the switching cycle time of the switching valve is reduced;

[0015] if the gas pressure change rate at the second to-be-detected position is less than or equal to the minimum value of the preset gas pressure change rate range, the switching cycle time of the switching valve is increased;

[0016] if the gas pressure change rate at the second to-be-detected position is within the preset gas pressure change rate range, the switching cycle time of the switching valve is maintained constant.

[0017] Further, after increasing the switching cycle time of the switching valve, the oxygen production system control method further includes:

[0018] reacquiring the gas pressure change rate at the second to-be-detected position and performing the target operation;

[0019] If the switching cycle time is adjusted to be greater than or equal to a preset switching cycle time, it is determined that the oxygen production device is damaged.

[0020] Further, the gas pressure parameter information further includes a time sequence diagram of the gas pressure value. The oxygen production system control method further includes:

[0021] According to the time sequence diagram of the gas pressure value at the third to-be-detected position, it is determined whether the exhaust silencer is damaged.

[0022] Further, the method for judging whether the exhaust muffler is damaged according to the time sequence diagram of the air pressure value at the third to-be-detected position comprises:

[0023] judging whether the time sequence diagram has periodicity;

[0024] if the time sequence diagram has periodicity, judging that the exhaust muffler is in normal operation;

[0025] if the time sequence diagram has non-periodicity and the minimum air pressure value in the time sequence diagram is greater than the standard atmospheric pressure value, judging that the exhaust muffler is damaged.

[0026] Further, after judging that the exhaust muffler is damaged, the method for controlling the oxygen production system further comprises:

[0027] adjusting the valve position of the reversing valve of the oxygen production device, so that the gas supply device, the oxygen production device and the exhaust muffler are sequentially communicated, to use the gas supply device to purge the exhaust muffler.

[0028] Further, the air pressure parameter information further comprises an air pressure value, and the method for controlling the oxygen production system further comprises:

[0029] judging the size relationship between the air pressure value at the first to-be-detected position and a preset air pressure value range;

[0030] if the air pressure value at the first to-be-detected position is greater than or equal to the maximum value of the preset air pressure value range, increasing the operating power of the gas supply device;

[0031] if the air pressure value at the first to-be-detected position is less than or equal to the minimum value of the preset air pressure value range, reducing the operating power of the gas supply device;

[0032] if the air pressure value at the first to-be-detected position is within the preset air pressure value range, maintaining the operating power of the gas supply device constant.

[0033] Further, the air pressure parameter information further comprises an air pressure value, and the method for adjusting the air pressure value at the to-be-detected position according to the air pressure parameter information comprises:

[0034] judging the size relationship between the air pressure value at the first to-be-detected position and a preset threshold value, and if the air pressure value at the first to-be-detected position is greater than or equal to the preset threshold value, performing a pressure relief operation on the first to-be-detected position;

[0035] judging the size relationship between the air pressure value at the second to-be-detected position and the preset threshold value, and if the air pressure value at the second to-be-detected position is greater than or equal to the preset threshold value, performing a pressure relief operation on the second to-be-detected position;

[0036] Judge the size relationship between the air pressure value at the third to-be-detected position and the preset threshold value, and if the air pressure value at the third to-be-detected position is greater than or equal to the preset threshold value, perform a pressure relief operation on the third to-be-detected position.

[0037] Further, the plurality of to-be-detected positions further include a fourth to-be-detected position, the fourth to-be-detected position is located outside the oxygen production system to obtain an atmospheric pressure value, and the oxygen production system control method further includes:

[0038] Judge the size relationship between the atmospheric pressure value and a preset atmospheric pressure value;

[0039] If the atmospheric pressure value is less than the preset atmospheric pressure value, increase the operating power of the gas supply device.

[0040] According to another aspect of the present application, an air conditioner is provided, which comprises the above-mentioned oxygen production system.

[0041] According to another aspect of the present application, an air conditioner is provided, which comprises the above-mentioned oxygen production system.

[0042] The technical scheme of the present application is applied to the oxygen production system control method, which comprises: obtaining air pressure parameter information at a plurality of to-be-detected positions; and performing pressure relief operation on the to-be-detected positions according to the air pressure parameter information to adjust the air pressure value at the to-be-detected positions; wherein the plurality of to-be-detected positions comprise a first to-be-detected position, a second to-be-detected position and a third to-be-detected position, the first to-be-detected position is located between a gas supply device of the oxygen production system and a gas supply silencer of the oxygen production system, the second to-be-detected position is located between the gas supply silencer and an oxygen production device of the oxygen production system, and the third to-be-detected position is located between the oxygen production device and an exhaust silencer of the oxygen production system. In this way, compared with the technical scheme of the prior art which performs corresponding control through air pressure detection at a single position, the present application specifically sets three to-be-detected positions and performs corresponding real-time pressure relief operation according to the air pressure parameter information of the three to-be-detected positions. The above setting not only realizes rapid and accurate acquisition of local air pressure parameter information, thereby ensuring the timeliness of the pressure relief operation, but also completely avoids the possibility of overpressure operation of the device (deformation or even damage of the device), greatly improves the operation stability of the oxygen production system and prolongs the service life of the oxygen production system, thereby solving the problems of low operation stability and short service life of the air conditioner oxygen production system in the prior art and improving the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0043] The accompanying drawings, which form a part of the present description, are included to provide a further understanding of the application and are incorporated herein for explanation by way of exemplification. The present application will become more fully understood from the detailed description and accompanying drawings given below.

[0044] Figure 1 Part of the flow chart of the embodiment of the oxygen production system control method according to the present application is shown;

[0045] Figure 2 Part of the flow chart of the oxygen production system control method according to the present application is shown; Figure 1

[0046] Part of the flow chart of the oxygen production system control method according to the present application is shown; Figure 3 Figure 1 Part of the flow chart of the oxygen production system control method according to the present application is shown;

[0047] Figure 4 Part of the flow chart of the oxygen production system control method according to the present application is shown; Figure 1

[0048] Part of the flow chart of the oxygen production system control method according to the present application is shown; Figure 5 Figure 1 Part of the flow chart of the oxygen production system control method according to the present application is shown;

[0049] Figure 6 Part of the flow chart of the oxygen production system control method according to the present application is shown; ​​

[0050] Wherein, the above figures include the following reference signs:

[0051] 1, air supply device; 2, air supply silencer; 3, oxygen generating device; 31, molecular sieve structure; 32, first reversing valve; 4, exhaust silencer; 5, first pressure detection piece; 6, pressure relief piece; 7, filtering device; 8, dehumidifying device; 9, second reversing valve; 10, check valve; 11, storage device; 12, buffer device; 13, flow valve; 14, storage device pressure relief valve. DETAILED DESCRIPTION

[0052] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0053] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0054] In the present application, unless otherwise specified, the orientation words such as "up, down" are generally directed to the directions shown in the drawings, or are directed to the vertical, perpendicular or gravity directions; similarly, for the convenience of understanding and description, "left, right" are generally directed to the left and right shown in the drawings; "inner, outer" refer to the inner and outer relative to the contour of each component itself, but the above orientation words are not used to limit the present application.

[0055] In order to solve the problem of low running stability and short service life of the oxygen generating system of the air conditioner in the prior art, the present application provides an oxygen generating system control method, an oxygen generating system and an air conditioner.

[0056] As shown in Figures 1 to 5 The oxygen generating system control method comprises:

[0057] obtaining air pressure parameter information at a plurality of to-be-detected positions;

[0058] performing pressure relief operation on the to-be-detected positions according to the air pressure parameter information, so as to adjust the air pressure values at the to-be-detected positions;

[0059] Wherein, the plurality of to-be-detected positions include a first to-be-detected position, a second to-be-detected position and a third to-be-detected position, the first to-be-detected position is located between the air supply device 1 of the oxygen generating system and the air supply silencer 2 of the oxygen generating system, the second to-be-detected position is located between the air supply silencer 2 and the oxygen generating device 3 of the oxygen generating system, and the third to-be-detected position is located between the oxygen generating device 3 and the exhaust silencer 4 of the oxygen generating system.

[0060] The technical scheme is applied to the oxygen production system control method, which comprises the following steps: obtaining gas pressure parameter information at a plurality of to-be-detected positions; and performing pressure relief operation on the to-be-detected positions according to the gas pressure parameter information to adjust the gas pressure values at the to-be-detected positions. The plurality of to-be-detected positions comprise a first to-be-detected position, a second to-be-detected position and a third to-be-detected position. The first to-be-detected position is located between a gas supply device 1 of the oxygen production system and a gas supply silencer 2 of the oxygen production system. The second to-be-detected position is located between the gas supply silencer 2 and an oxygen production device 3 of the oxygen production system. The third to-be-detected position is located between the oxygen production device 3 and an exhaust silencer 4 of the oxygen production system. In this way, compared with the technical scheme in the prior art in which the corresponding control is performed through gas pressure detection at a single position, the three to-be-detected positions are set in the embodiment, and the corresponding real-time pressure relief operation is performed according to the gas pressure parameter information at the three to-be-detected positions. The above setting not only realizes rapid and accurate acquisition of local gas pressure parameter information, thereby ensuring the timeliness of the pressure relief operation, but also completely avoids the possibility of overpressure operation of the device (deformation or even damage of the device), greatly improves the operation stability of the oxygen production system and prolongs the service life of the oxygen production system, thereby solving the problems of low operation stability and short service life of the air conditioner oxygen production system in the prior art and improving the user experience.

[0061] In the embodiment, the gas pressure parameter information comprises a gas pressure change rate value. According to the gas pressure parameter information at the second to-be-detected position, the method for adjusting the reversing cycle time of the reversing valve of the oxygen production device 3 comprises performing the following target operation:

[0062] judging the size relationship between the gas pressure change rate value at the second to-be-detected position and a preset gas pressure change rate range;

[0063] if the gas pressure change rate at the second to-be-detected position is greater than or equal to the maximum value of the preset gas pressure change rate range, the reversing cycle time of the reversing valve is reduced;

[0064] if the gas pressure change rate at the second to-be-detected position is less than or equal to the minimum value of the preset gas pressure change rate range, the reversing cycle time of the reversing valve is increased;

[0065] if the gas pressure change rate at the second to-be-detected position is within the preset gas pressure change rate range, the reversing cycle time of the reversing valve is maintained constant.

[0066] Thus, by adjusting the switching time of the reversing valve of the oxygen generating device 3 in real time, on the one hand, it can avoid insufficient pressurization of the molecular sieve structure 31 in the oxygen generating device 3 (the gas pressure change rate value is too small), which leads to insufficient adsorption cycle of the molecular sieve structure 31, thereby prolonging the service life of the molecular sieve structure 31; on the other hand, it can avoid invalid pressurization work (i.e. the gas pressure change rate value is too large), and the nitrogen adsorption process of the molecular sieve structure 31 in the oxygen generating device 3 is saturated before the reversing valve is switched, thereby reducing the operating power consumption of the oxygen generating device 3.

[0067] Specifically, two molecular sieve structures 31 are arranged in the oxygen generating device 3, and the working state of the two molecular sieve structures 31 is repeatedly switched by adjusting the passage state of the reversing valve (i.e. one molecular sieve structure 31 is pressurized and adsorbed, and the other molecular sieve structure 31 is depressurized and desorbed, and the two molecular sieve structures 31 are alternately switched to realize continuous generation of oxygen-enriched gas, see the definition of the oxygen generating system regarding the oxygen generating device 3), and the time interval for each switching is the switching cycle time of the reversing valve. The molecular sieve structure 31 in the depressurized and desorbed state is in communication with the outside to be depressurized to atmospheric pressure, and when the molecular sieve structure 31 after depressurized and desorbed is switched to the pressurized and adsorbed state, high-pressure gas is introduced into it to realize pressurization. In this process, the gas pressure change rate value at the third detection position should fluctuate within a relatively fixed range, and the gas pressure change rate value (pressurization speed) and the switching cycle time (pressurization time) are the core factors affecting the generation of oxygen-enriched gas by the molecular sieve structure 31 (the gas pressure change rate value determines the collision intensity between the gas molecules and the molecular sieve structure 31, thereby determining the time for the molecular sieve structure 31 to reach a relatively saturated adsorption state, and the switching cycle time determines the total adsorption time of the molecular sieve structure 31). If the gas pressure change rate value is too large, it means that the molecular sieve structure 31 will reach a relatively saturated adsorption state before the next switching, i.e. the adsorption capacity of the molecular sieve structure 31 is greatly weakened after reaching a relatively saturated adsorption state, and the gas supply device 1 is doing invalid work. Therefore, the switching cycle time should be reduced at this time to reduce the overall energy consumption of the oxygen generating system. At the same time, if the gas pressure change rate value is too small, it means that the adsorption speed of the molecular sieve structure 31 is too small, on the one hand, the molecular sieve structure 31 does not adsorb nitrogen sufficiently within the switching cycle time, and on the other hand, the internal gas pressure is not high enough, so the switching cycle time should be extended to ensure that the gas can flow into the molecular sieve structure 31 sufficiently, which not only improves the oxygen generating efficiency of the oxygen generating device 3, but also avoids partial adsorption of the molecular sieve structure 31, thereby greatly shortening the service life of the molecular sieve structure 31 under the same oxygen-enriched gas generation condition.

[0068] Specifically, taking the oxygen generating system with a specification of 5L / min as an example, the switching cycle time is usually preset to 5S, and the preset gas pressure change rate range is usually between 12kPa / s and 35kPa / s.

[0069] In this embodiment, if the gas pressure change rate at the second to-be-detected position is less than or equal to the minimum value of the preset gas pressure change rate range, the switching cycle time of the reversing valve is increased by 1S.

[0070] In this embodiment, after increasing the switching cycle time of the reversing valve, the oxygen generating system control method further comprises:

[0071] reacquiring the gas pressure change rate at the second to-be-detected position and performing a target operation;

[0072] If the switching cycle time is adjusted to be greater than or equal to the preset switching cycle time, it is determined that the oxygen generating device 3 is damaged.

[0073] In this way, the above setting provides a judgment basis logic for whether the oxygen generating device 3 has been damaged, so as to grasp the actual working state of the oxygen generating device 3, and then perform timely and rapid maintenance, thereby improving the user's experience.

[0074] In this embodiment, the preset switching cycle time is 9S.

[0075] Specifically, after multiple adjustments, the core reason why the gas pressure change rate value is still too small (less than or equal to the preset minimum gas pressure change rate value) is that there is basically no gas or a small amount of gas in the second to-be-detected position into the oxygen generating device 3, thereby causing the gas pressure in the second to-be-detected position to fluctuate only slightly. The actual causes of the above situation are two, one is that the reversing valve is damaged, that is, the reversing valve is jammed, the opening degree is reduced, and thus the gas cannot flow into the molecular sieve structure 31, and the other is that the molecular sieve structure 31 is seriously aged (mainly powdered), and the particles after powdering block the molecular sieve structure 31, and the gas cannot flow into the molecular sieve structure 31. That is, after multiple adjustments, the problem that the gas pressure change rate value is still too small actually means that the oxygen generating device 3 has been damaged.

[0076] In this embodiment, when it is determined that the oxygen generating device 3 is damaged, a corresponding alarm signal (such as a flashing indicator light set on the indoor unit of the air conditioner or sending corresponding alarm information to the user's mobile phone through the software matched with the air conditioner) can also be sent to remind the user to maintain the oxygen generating device 3, so as to avoid the oxygen generating function of the air conditioner being invalid due to the oxygen generating device 3 not running normally, thereby improving the running stability of the oxygen generating system.

[0077] In this embodiment, the gas pressure parameter information further comprises a time sequence diagram of the gas pressure value, and the oxygen generating system control method further comprises:

[0078] According to the time sequence diagram of the air pressure value at the third to-be-detected position, it is determined whether the exhaust silencer 4 is damaged.

[0079] Specifically, the method of determining whether the exhaust silencer 4 is damaged according to the time sequence diagram of the air pressure value at the third to-be-detected position comprises:

[0080] determining whether the time sequence diagram has periodicity;

[0081] if the time sequence diagram has periodicity, it is determined that the exhaust silencer 4 is in normal operation;

[0082] if the time sequence diagram has non-periodicity and the minimum air pressure value in the time sequence diagram is greater than the standard atmospheric pressure value, it is determined that the exhaust silencer 4 is damaged.

[0083] In this way, the above setting provides a judgment basis logic for whether the exhaust silencer 4 has been damaged, so as to grasp the actual working state of the exhaust silencer 4, and then perform timely and rapid maintenance, thereby improving the user's experience.

[0084] Specifically, the time sequence diagram is a waveform diagram of the air pressure value at the third to-be-detected position and time.

[0085] Specifically, as the working state of the two molecular sieve structures 31 is switched continuously, the air pressure value at the third to-be-detected position should present periodic changes, that is, whenever the molecular sieve structure 31 in the pressure-increasing adsorption state is switched to the pressure-reducing desorption state, the air pressure value at the third to-be-detected position will present a waveform of suddenly increasing and then gradually decreasing to the atmospheric pressure value, which means that the exhaust silencer 4 is in normal operation at this time. However, if the time sequence diagram has non-periodicity and the minimum air pressure value in the time sequence diagram is greater than the standard atmospheric pressure value, it means that the molecular sieve structure 31 does not perform complete exhaust during the switching period of time and the air pressure change presents a random state. In fact, this is mainly because the pulverized particles of the molecular sieve structure 31 block the exhaust silencer 4. Through the above logical judgment, the damage state of the exhaust silencer 4 can be quickly and timely grasped, so as to perform timely maintenance, thereby avoiding the phenomenon that the molecular sieve structure 31 cannot normally generate oxygen-enriched gas due to incomplete exhaust, or even overpressure operation damage, thereby prolonging the service life of the molecular sieve structure 31 and improving the operation stability of the oxygen generation system.

[0086] In the embodiment, after it is determined that the exhaust silencer 4 is damaged, the oxygen generation system control method further comprises:

[0087] adjusting the valve position of the reversing valve of the oxygen generation device 3, so that the gas supply device 1, the oxygen generation device 3 and the exhaust silencer 4 are sequentially communicated, so as to use the gas supply device 1 to purge the exhaust silencer 4.

[0088] In this way, the above setting realizes the self-cleaning function of the exhaust silencer 4, that is, when the oxygen generating system is normally running, only two molecular sieve structures 31 are communicated with the exhaust silencer 4 and the gas supply device 1 respectively, and there is no communication relationship between the gas supply device 1 and the exhaust silencer 4. Due to the limited internal gas of the molecular sieve structure 31 (and after being communicated with the exhaust silencer 4, the internal gas pressure will be rapidly affected), it is actually impossible to produce a purge effect on the exhaust silencer 4. In this embodiment, after judging that the exhaust silencer 4 is damaged, the valve position of the reversing valve is adjusted to realize the sequential communication between the gas supply device 1, one molecular sieve structure 31, another molecular sieve structure 31 and the exhaust silencer 4, thereby realizing the "co-pressure purge" function between the two molecular sieve structures 31, so that the high-pressure gas can continuously flow to the exhaust silencer 4, thereby realizing the self-cleaning function of the oxygen generating system and improving the user's experience.

[0089] In this embodiment, when the above purge program runs for a certain time, the oxygen generating system will be switched back to the normal running state, and the time sequence diagram at the third to-be-detected position is also reacquired. If it is still judged that the exhaust silencer 4 is damaged at this time, it means that the exhaust silencer 4 is seriously blocked and cannot restore its exhaust capacity through the purge function, that is, a corresponding alarm signal (such as the flashing of the indicator light on the indoor unit of the air conditioner or the sending of corresponding alarm information to the user's mobile phone through the software matched with the air conditioner) can be sent to remind the user to overhaul the exhaust silencer 4.

[0090] In this embodiment, the gas pressure parameter information further includes a gas pressure value, and the oxygen generating system control method further includes:

[0091] judging the size relationship between the gas pressure value at the first to-be-detected position and the preset gas pressure value range;

[0092] if the gas pressure value at the first to-be-detected position is greater than or equal to the maximum value of the preset gas pressure value range, increasing the running power of the gas supply device 1;

[0093] if the gas pressure value at the first to-be-detected position is less than or equal to the minimum value of the preset gas pressure value range, reducing the running power of the gas supply device 1;

[0094] if the gas pressure value at the first to-be-detected position is within the preset gas pressure value range, maintaining the running power of the gas supply device 1 constant.

[0095] In this way, the above setting realizes the real-time adjustment of the gas supply pressure parameter of the gas supply device 1, and the gas supply device 1 is actually the overall running gas source of the oxygen generating system. The real-time adjustment can maximize the size of the gas pressure value in the oxygen generating system and make it relatively stable, which helps to improve the running stability of the oxygen generating system.

[0096] In the embodiment, the preset air pressure value range is generally between 0.1 Mpa and 0.7 Mpa.

[0097] In the embodiment, if the air pressure value at the first to-be-detected position is greater than or equal to the maximum value of the preset air pressure value range, it means that the air supply silencer 2 is blocked, and the operation power of the air supply device 1 is reduced to reduce the air supply pressure value, thereby avoiding damage of the air supply silencer 2 due to overpressure operation, prolonging the service life of the air supply silencer 2, and simultaneously sending a corresponding alarm signal (such as flickering of an indicator light arranged on an indoor unit of the air conditioner or sending of corresponding alarm information to a user's mobile phone through software matched with the air conditioner) to remind the user to maintain the air supply silencer 2.

[0098] Optionally, when the operation power of the air supply device 1 is increased, the operation power of the air supply device 1 is generally increased to 1.2 times of the current operation power.

[0099] In the embodiment, if the air pressure value at the first to-be-detected position is still less than or equal to the minimum value of the preset air pressure value range after the operation power of the air supply device 1 is increased, there can be two reasons, one is that the filter device 7 or the dehumidification device 8 is blocked, that is, the air intake amount of the air supply device 1 cannot meet the normal working demand, thereby causing the air supply pressure value to be always small, and the other is that the air supply device 1 is damaged and cannot perform normal air compression work, at this time, a corresponding alarm signal (such as flickering of an indicator light arranged on an indoor unit of the air conditioner or sending of corresponding alarm information to a user's mobile phone through software matched with the air conditioner) can be sent simultaneously to remind the user to maintain the air supply device 1, the filter device 7 and the dehumidification device 8.

[0100] In the embodiment, the air pressure parameter information further includes an air pressure value, and the method for adjusting the air pressure value at the to-be-detected position according to the air pressure parameter information includes:

[0101] determining a size relationship between the air pressure value at the first to-be-detected position and a preset threshold value, and if the air pressure value at the first to-be-detected position is greater than or equal to the preset threshold value, performing a pressure relief operation on the first to-be-detected position;

[0102] determining a size relationship between the air pressure value at the second to-be-detected position and the preset threshold value, and if the air pressure value at the second to-be-detected position is greater than or equal to the preset threshold value, performing a pressure relief operation on the second to-be-detected position;

[0103] determining a size relationship between the air pressure value at the third to-be-detected position and the preset threshold value, and if the air pressure value at the third to-be-detected position is greater than or equal to the preset threshold value, performing a pressure relief operation on the third to-be-detected position.

[0104] In this way, the above setting can prevent the corresponding gas supply silencer 2 at the first detection position, the corresponding oxygen generating device 3 at the second detection position and the corresponding exhaust silencer 4 at the third detection position from overpressure operation, and the service life of the above devices is maximized.

[0105] Optionally, the preset threshold is 0.7 MPa, and the specific setting parameter can be adjusted according to the actual device running pressure load upper limit inside the oxygen generating system.

[0106] In the embodiment, the plurality of detection positions further include a fourth detection position located outside the oxygen generating system to obtain an atmospheric pressure value, and the oxygen generating system control method further includes:

[0107] determining the size relationship between the atmospheric pressure value and the preset atmospheric pressure value;

[0108] If the atmospheric pressure value is less than the preset atmospheric pressure value, the running power of the gas supply device 1 is increased.

[0109] In this way, the above setting makes the gas supply pressure value of the gas supply device 1 further match the atmospheric pressure to adapt to the plateau low-pressure environment, thereby improving the universality and running stability of the oxygen generating system.

[0110] Specifically, the normal atmospheric pressure is about 101.325 kPa, the plateau pressure at an altitude of 1000 meters is about 89.87 kPa, the plateau pressure at an altitude of 2000 meters is about 79.72 kPa, the plateau pressure at an altitude of 3000 meters is about 70.71 kPa, and the plateau pressure at an altitude of 4000 meters is about 62.48 kPa. As the altitude increases, the gradually decreasing atmospheric pressure cannot support the normal operation of the gas supply device 1 (i.e., under the same running power, the gas supply pressure value of the gas supply device 1 will decrease), at which time the running power of the gas supply device 1 can be increased and the maximum value of the preset pressure value range can be adjusted to ensure that the gas supply device 1 can operate at a greater power.

[0111] The above oxygen generating system control method of the embodiment has at least the following advantages:

[0112] 1. Multi-position local pressure detection is realized, and corresponding pressure relief operations are configured to completely prevent damage caused by overpressure operation of the core components of the oxygen generating system, thereby greatly ensuring the service life of each component;

[0113] 2. The damage judgment logic detection of the gas supply device 1, the gas supply silencer 2, the oxygen generating device 3, the exhaust silencer 4, the filter device 7 and the dehumidifying device 8 ensures that the damage of the above devices can be found in time for timely maintenance, thereby improving the running stability of the oxygen generating system;

[0114] 3. The oxygen production self-adaptive capability of the plateau environment greatly improves the versatility of the air conditioner using the corresponding oxygen production system.

[0115] 4. The operation power of the gas supply device 1 is adjusted in real time, which ensures that the internal gas pressure of the oxygen production system is appropriate and relatively stable, and improves the operation stability of the oxygen production system.

[0116] 5. The reversing valve reversing cycle time is self-adaptively adjusted, which helps to reduce the overall power consumption, prolong the service life of the molecular sieve structure, and improve the oxygen production efficiency.

[0117] As shown in Figure 6 The present application also provides an oxygen production system, which is controlled by the above-mentioned oxygen production system control method. The oxygen production system comprises a gas supply device 1, a gas supply silencer 2, an oxygen production device 3, and an exhaust silencer 4, which are sequentially connected by pipelines. The oxygen production device 3 comprises a molecular sieve structure 31 and a first reversing valve 32 connected with the molecular sieve structure 31. The molecular sieve structure 31 is at least two. The gas supply silencer 2 and the exhaust silencer 4 are both connected with the first reversing valve 32. The first reversing valve 32 is used to adjust the connection state between the at least two molecular sieve structures 31, the gas supply silencer 2, and the exhaust silencer 4. The pipelines between the gas supply device 1 and the gas supply silencer 2, the pipelines between the gas supply silencer 2 and the first reversing valve 32, and the pipelines between the first reversing valve 32 and the exhaust silencer 4 are all provided with first pressure detection members 5, which are used to detect the gas pressure parameter information in the pipelines at the positions where the first pressure detection members 5 are arranged. A second pressure detection member is used to detect the atmospheric pressure value. A pressure relief member 6 is connected with the pipelines and is used to relieve the gas in the pipelines. The pressure relief member 6 is connected with the first pressure detection members 5. There are multiple pressure relief members 6, which are one-to-one corresponding to the multiple first pressure detection members 5. A control module is connected with the gas supply device 1, the pressure relief member 6, the first pressure detection members 5, the first reversing valve 32, and the second pressure detection member.

[0118] In this embodiment, the first pressure detection member 5 arranged on the pipeline between the gas supply device 1 and the gas supply silencer 2 is used to detect the gas pressure parameter information at the first detection position. The first pressure detection member 5 arranged on the pipeline between the gas supply silencer 2 and the first reversing valve 32 is used to detect the gas pressure parameter information at the second detection position. The first pressure detection member 5 arranged on the pipeline between the first reversing valve 32 and the exhaust silencer 4 is used to detect the gas pressure parameter information at the third detection position.

[0119] In this embodiment, the gas supply device 1 is an air compressor, which can supply high-pressure air.

[0120] In the embodiment, the first reversing valve 32 is an electrically controlled four-way valve, and the two molecular sieve structures 31. In the normal operation of the oxygen generating system, the electrically controlled four-way valve controls one of the molecular sieve structures 31 to be connected with the air supply device 1, and the high-pressure air supplied by the air supply device 1 is introduced into the molecular sieve structure 31 to realize the pressurized adsorption process (adsorbing nitrogen) of the molecular sieve structure 31, and the generated oxygen-enriched gas is introduced into the indoor unit of the air conditioner and then into the indoor. At the same time, the electrically controlled four-way valve also controls the other molecular sieve structure 31 to be connected with the exhaust muffler 4, which is actually connected with the atmosphere, to realize the depressurized desorption process (releasing nitrogen) of the molecular sieve structure 31. After the reversing period of time, the two molecular sieve structures 31 are switched to realize the connection relationship, the molecular sieve structure 31 originally performing the pressurized adsorption process is connected with the exhaust muffler 4 to realize the depressurized desorption process, and the molecular sieve structure 31 originally performing the depressurized desorption process is connected with the air supply device 1 to realize the pressurized adsorption process, thereby ensuring that the oxygen-enriched gas can be continuously supplied to the indoor unit of the air conditioner.

[0121] In the embodiment, the oxygen generating system further comprises a second reversing valve 9, a storage device 11, a buffer device 12, and a flow valve 13. The second reversing valve 9 is an electrically controlled three-way valve, the gas outlet of the molecular sieve structure 31 for generating oxygen-enriched gas is connected with the second reversing valve 9, and the other two valve ports of the second reversing valve 9 are respectively connected with the storage device 11 and the buffer device 12. The storage device 11 and the buffer device 12 are further connected with the oxygen gas outlet of the indoor unit of the air conditioner, and the flow valve is arranged between the oxygen gas outlet and the storage device 11 and the buffer device 12. In the normal operation of the oxygen generating system, the molecular sieve structure 31 for generating oxygen-enriched gas is connected with the flow valve 13 and the oxygen gas outlet through the second reversing valve 9, the flow valve 13 is used to control the air flow at the oxygen gas outlet, and the excess oxygen-enriched gas is collected in the storage device 11.

[0122] Specifically, when the second reversing valve 9 is switched to be closed (the molecular sieve structure 31 is not connected with the storage device 11 and the buffer device 12), and the mutual connection between the two molecular sieve structures 31 is realized through the first reversing valve 32, the "co-pressurized purging" function can be realized.

[0123] In the embodiment, the oxygen production system further comprises three one-way valves 10, one of which is arranged between the second reversing valve 9 and the storage device 11, one of which is arranged between the storage device 11 and the flow valve 13, and one of which is arranged between the second reversing valve 9 and the buffer device 12. The one-way valve 10 arranged between the second reversing valve 9 and the buffer device 12 is used to realize one-way flow of the oxygen-rich gas to the buffer device 12. The one-way valve 10 arranged between the storage device 11 and the flow valve 13 is used to realize one-way flow of the oxygen-rich gas in the storage device 11 to the flow valve 13. The arrangement of the two one-way valves 10 avoids the backflow of the oxygen-rich gas and helps to improve the operation stability of the oxygen production system. Meanwhile, the arrangement of the two one-way valves 10 also causes a large amount of oxygen-rich gas to stagnate in the pipeline after the flow valve 13 is closed. Therefore, the buffer device 12 is arranged, which is connected between the one-way valve 10 and the flow valve 13 between the flow valve 13 and the storage device 11. After the flow valve 13 is closed, the oxygen in the pipeline can flow back to the buffer device 12, so as to reduce the internal gas pressure of the pipeline and prolong the service life. Meanwhile, the one-way valve 10 arranged between the second reversing valve 9 and the buffer device 12 can avoid the backflow of the oxygen-rich gas at the buffer device 12 to the second reversing valve 9, thereby prolonging the service life of the second reversing valve 9.

[0124] In the embodiment, the storage device 11 is further provided with a storage device pressure relief valve 14 connected thereto, which is used to relieve the pressure of the oxygen-rich gas in the storage device 11, so as to avoid excessive internal pressure of the storage device 11 and prolong the service life of the storage device 11.

[0125] In the embodiment, the gas inlet of the gas supply device 1 is further provided with a filter device 7 and a dehumidifying device 8. That is, the external air flows into the filter device 7 and the dehumidifying device 8 in sequence and then enters the gas supply device 1, so as to reduce the impurity content and humidity value of the gas entering the gas supply device 1, thereby helping to prolong the service life of the gas supply device 1 and the molecular sieve structure 31 (the operation of the molecular sieve structure 31 in a high-humidity air environment will accelerate the pulverization phenomenon thereof).

[0126] The application also provides an air conditioner comprising the above oxygen production system.

[0127] From the above description, it can be seen that the above embodiments of the application achieve the following technical effects:

[0128] The oxygen production system control method comprises: obtaining air pressure parameter information at a plurality of to-be-detected positions; and performing pressure relief operation on the to-be-detected positions according to the air pressure parameter information to adjust the air pressure value at the to-be-detected positions. The plurality of to-be-detected positions comprise a first to-be-detected position, a second to-be-detected position and a third to-be-detected position. The first to-be-detected position is located between a gas supply device of the oxygen production system and a gas supply silencer of the oxygen production system. The second to-be-detected position is located between the gas supply silencer and an oxygen production device of the oxygen production system. The third to-be-detected position is located between the oxygen production device and an exhaust silencer of the oxygen production system. In this way, compared with the prior art which controls through air pressure detection at a single position, the present application sets three to-be-detected positions and performs real-time pressure relief operation according to the air pressure parameter information of the three to-be-detected positions. The above setting not only realizes rapid and accurate acquisition of local air pressure parameter information, thereby ensuring the timeliness of the pressure relief operation, but also completely avoids the possibility of overpressure operation of the device (deformation or even damage of the device), greatly improves the operation stability of the oxygen production system and prolongs the service life of the oxygen production system, thereby solving the problems of low operation stability and short service life of the air conditioner oxygen production system in the prior art and improving the user experience.

[0129] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0130] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should be understood that, when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, work, device, component and / or combination thereof.

[0131] It should be noted that the terms "first", "second", and the like used in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0132] The above merely provides the preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the principles and technical scope of the present application shall fall into the scope of the present application.

Claims

1. A method for controlling an oxygen generation system, characterized in that, include: Acquire air pressure parameter information at multiple locations to be detected; Based on the air pressure parameter information, a depressurization operation is performed at the location to be detected to adjust the air pressure value at the location to be detected; The plurality of locations to be detected include a first location to be detected, a second location to be detected, and a third location to be detected. The first location to be detected is located between the gas supply device (1) of the oxygen generating system and the gas supply silencer (2) of the oxygen generating system. The second location to be detected is located between the gas supply silencer (2) and the oxygen generating device (3) of the oxygen generating system. The third location to be detected is located between the oxygen generating device (3) and the exhaust silencer (4) of the oxygen generating system.

2. The oxygen generation system control method according to claim 1, characterized in that, The oxygen generation system control method further includes: Based on the air pressure parameter information at the second detection location, adjust the switching cycle time of the switching valve of the oxygen generator (3).

3. The oxygen generation system control method according to claim 2, characterized in that, The gas pressure parameter information includes the gas pressure change rate value. The method for adjusting the switching cycle time of the reversing valve of the oxygen generator (3) based on the gas pressure parameter information at the second detection location includes performing the following target operations: Determine the relationship between the gas pressure change rate value at the second detection location and the preset gas pressure change rate range; If the rate of change of gas pressure at the second detection location is greater than or equal to the maximum value of the preset gas pressure change rate range, then the switching cycle time of the switching valve is reduced. If the rate of change of gas pressure at the second detection location is less than or equal to the minimum value of the preset range of gas pressure change rates, then the switching cycle time of the switching valve is increased. If the rate of change of gas pressure at the second detection location is within the preset range of the rate of change of gas pressure, then the switching cycle time of the switching valve is kept constant.

4. The oxygen generation system control method according to claim 3, characterized in that, After increasing the switching cycle time of the switching valve, the oxygen generation system control method further includes: Reacquire the gas pressure change rate at the second detection location and execute the target operation; If the reversing cycle time is adjusted to be greater than or equal to the preset reversing cycle time, then the oxygen generating device (3) is determined to be damaged.

5. The oxygen generation system control method according to claim 1, characterized in that, The pressure parameter information also includes a time-series graph of the pressure values, and the oxygen generation system control method further includes: Based on the time sequence diagram of the air pressure value at the third detection location, determine whether the exhaust muffler (4) is damaged.

6. The oxygen generation system control method according to claim 5, characterized in that, The method for determining whether the exhaust muffler (4) is damaged based on the time sequence diagram of the air pressure value at the third detection location includes: Determine whether the time sequence diagram has periodicity; If the timing diagram is periodic, then the exhaust muffler (4) is determined to be operating normally; If the timing diagram is non-periodic and the minimum air pressure value in the timing diagram is greater than the standard atmospheric pressure value, then the exhaust muffler (4) is determined to be damaged.

7. The oxygen generation system control method according to claim 6, characterized in that, After determining that the exhaust muffler (4) is damaged, the oxygen generation system control method further includes: Adjust the valve position of the reversing valve of the oxygen generating device (3) so that the gas supply device (1), the oxygen generating device (3) and the exhaust silencer (4) are connected in sequence, so that the gas supply device (1) can be used to purge the exhaust silencer (4).

8. The oxygen generation system control method according to claim 1, characterized in that, The air pressure parameter information also includes air pressure values, and the oxygen generation system control method further includes: Determine the relationship between the air pressure value at the first detection location and the preset air pressure range; If the air pressure value at the first detection location is greater than or equal to the maximum value of the preset air pressure range, then the operating power of the air supply device (1) is increased; If the air pressure value at the first detection location is less than or equal to the minimum value of the preset air pressure value range, then reduce the operating power of the air supply device (1); If the air pressure value at the first detection location is within the preset air pressure value range, the operating power of the air supply device (1) is kept constant.

9. The oxygen generation system control method according to claim 1, characterized in that, The air pressure parameter information also includes air pressure values. A method for adjusting the air pressure value at the location to be detected by depressurizing based on the air pressure parameter information includes: Determine the relationship between the air pressure value at the first detection location and a preset threshold. If the air pressure value at the first detection location is greater than or equal to the preset threshold, then perform a depressurization operation at the first detection location. Determine the relationship between the air pressure value at the second detection location and the preset threshold. If the air pressure value at the second detection location is greater than or equal to the preset threshold, then perform a depressurization operation at the second detection location. Determine the relationship between the air pressure value at the third detection location and the preset threshold. If the air pressure value at the third detection location is greater than or equal to the preset threshold, then perform a depressurization operation at the third detection location.

10. The oxygen generation system control method according to claim 1, characterized in that, The plurality of locations to be detected also includes a fourth location to be detected, the fourth location being located outside the oxygen generation system to obtain atmospheric pressure values, and the oxygen generation system control method further includes: Determine the relationship between the atmospheric pressure value and the preset atmospheric pressure value; If the atmospheric pressure value is less than the preset atmospheric pressure value, the operating power of the gas supply device (1) is increased.

11. An oxygen generation system, characterized in that, The oxygen generation system is controlled using the oxygen generation system control method according to any one of claims 1 to 10, and the oxygen generation system comprises: The gas supply device (1), gas supply silencer (2), oxygen generator (3), and exhaust silencer (4) are interconnected by pipelines. The oxygen generator (3) includes a molecular sieve structure (31) and a first reversing valve (32) connected to the molecular sieve structure (31). There are at least two molecular sieve structures (31). The gas supply silencer (2) and the exhaust silencer (4) are both connected to the first reversing valve (32). The first reversing valve (32) is used to adjust the connection state between at least two of the molecular sieve structures (31), the gas supply silencer (2), and the exhaust silencer (4). The first pressure detection element (5) is provided in the pipeline between the gas supply device (1) and the gas supply silencer (2), the pipeline between the gas supply silencer (2) and the first reversing valve (32), and the pipeline between the first reversing valve (32) and the exhaust silencer (4). The first pressure detection element (5) is used to detect the gas pressure parameter information in the pipeline at its setting position. The second pressure sensing element is used to detect atmospheric pressure. Pressure relief component (6) is connected to the pipeline and is used to relieve the pressure of the gas in the pipeline. The pressure relief component (6) is connected to the first pressure detection component (5). There are multiple pressure relief components (6), and multiple pressure relief components (6) are arranged one-to-one with multiple first pressure detection components (5). The control module is connected to the gas supply device (1), the pressure relief component (6), the first pressure detection component (5), the first reversing valve (32), and the second pressure detection component.

12. An air conditioner, characterized in that, The air conditioner includes the oxygen generation system as described in claim 11.

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