Oxygen production device, control method thereof and air conditioner

Abstract

The oxygen production device comprises an air compressor and an oxygen production molecular sieve, the air compressor is provided with an air suction pipe and an exhaust pipe, an outlet of the exhaust pipe is communicated with an inlet of the oxygen production molecular sieve, the air suction pipe is provided with an air suction heat exchange pipe section, and the exhaust pipe is provided with an exhaust heat exchange pipe section. The air suction heat exchange pipe section and the exhaust heat exchange pipe section are connected in a heat exchange mode so that air suction airflow circulating in the air suction heat exchange pipe section can cool exhaust airflow circulating in the exhaust heat exchange pipe section. The low-temperature suction airflow can be used for cooling the high-temperature exhaust airflow in the operation process of the air compressor, the oxygen generation efficiency of the follow-up oxygen generation molecular sieve is effectively improved, the overall size of the oxygen generation device is effectively reduced, the device structure is more compact, the requirement for the installation space is reduced, and the cost is reduced. Meanwhile, a special cooling device does not need to be specially arranged on the exhaust pipe, so that the overall preparation cost of the oxygen generation device is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of air conditioning, and in particular relates to an oxygen production device and a control method thereof, and an air conditioner. Background Art

[0002] In modern life, as people's requirements for indoor air quality increase, oxygen-generating air-conditioning technology has gradually become one of the important means to improve indoor air quality. Oxygen-generating air conditioners increase the oxygen content of indoor air by setting up an oxygen-generating module (that is, an oxygen-generating device), providing users with a healthier and more comfortable living environment. However, the traditional oxygen-generating module uses an air compressor (that is, an air compressor) plus a molecular sieve to produce oxygen. If the temperature of the air passing through the molecular sieve is too high, the oxygen-generating efficiency of the molecular sieve will be reduced. Based on the above-mentioned deficiencies, the related technology achieves natural cooling by lengthening the exhaust pipe or setting a cooling component on the exhaust pipe to cool the compressed air, which results in a large installation space requirement (caused by the excessively long pipeline) or high cost. At the same time, the air inhaled by the molecular sieve for a long time contains moisture, which will cause the molecular sieve particles to pulverize or agglomerate, thereby causing the molecular sieve to fail and fail to meet the life requirements of the oxygen production module. Based on this deficiency, in the related art, a corresponding drying device is arranged on the suction pipe or exhaust pipe of the air compressor to dry the compressed air entering the molecular sieve. However, the service life of the desiccant in the drying device is limited, and it needs to be replaced and maintained after the service life is reached, resulting in a high cost of use. In addition, the drying device is generally arranged on the outdoor unit, and the replacement of the desiccant is more difficult. Summary of the invention

[0003] Therefore, the present invention provides an oxygen production device and a control method thereof, and an air conditioner, which can overcome the technical problems in the related art that the exhaust gas cooling treatment of the air compressor by the oxygen production device requires a large installation space or leads to high product manufacturing costs.

[0004] In order to solve the above problems, the present invention provides an oxygen production device, including an air compressor and an oxygen-producing molecular sieve, the air compressor has an intake pipe and an exhaust pipe, the outlet of the exhaust pipe is connected to the inlet of the oxygen-producing molecular sieve, the intake pipe has an intake heat exchange pipe section, the exhaust pipe has an exhaust heat exchange pipe section, the intake heat exchange pipe section is connected to the exhaust heat exchange pipe section for heat exchange so that the intake air flow flowing in the intake heat exchange pipe section cools the exhaust air flow flowing in the exhaust heat exchange pipe section.

[0005] In some embodiments, a pipe-in-pipe structure is formed between the intake heat exchange pipe section and the exhaust heat exchange pipe section.

[0006] In some embodiments, the intake heat exchange pipe section is sleeved on the radially outer side of the exhaust heat exchange pipe section, and the pipe wall of the intake heat exchange pipe section has multiple air inlets; and / or the intake heat exchange pipe section and the exhaust heat exchange pipe section form a heat exchange module with an independent structure.

[0007] In some embodiments, the air inlets are arranged at intervals around the circumference of the air intake heat exchange pipe segment, and are arranged in multiple circles along the axial direction of the air intake heat exchange pipe segment.

[0008] In some embodiments, an annular gap is formed between the intake heat exchange pipe section and the exhaust heat exchange pipe section, and a drying medium is provided in the annular gap.

[0009] In some embodiments, two of the intake pipes and two of the exhaust pipes are respectively provided, the two intake pipes are provided in parallel, the two exhaust pipes are provided in parallel, and each of the intake pipes and each of the exhaust pipes is respectively connected in series with an on-off valve.

[0010] In some embodiments, the exhaust heat exchange pipe segment is configured with a flow hole penetrating the inside and outside thereof, and a portion of the exhaust gas flow can enter the annular gap through the flow hole.

[0011] In some embodiments, the diameter of the through hole of the exhaust heat exchange pipe section is D, the aperture of the through hole is d, and 0<d≤D / 30.

[0012] The present invention also provides a control method for the oxygen production device as described above, comprising the following steps:

[0013] Acquiring the real-time humidity of the drying medium arranged in each of the air intake heat exchange pipe sections;

[0014] When the real-time humidity is higher than the preset humidity value, the on-off valve corresponding to the intake heat exchange pipe segment is controlled to be in a cut-off state, the on-off valve corresponding to the exhaust heat exchange pipe segment connected for heat exchange with the intake heat exchange pipe segment is controlled to be in a conducting state, the on-off valve corresponding to another intake heat exchange pipe segment is controlled to be in a conducting state, and the on-off valve corresponding to another exhaust heat exchange pipe segment is controlled to be in a cut-off state.

[0015] The present invention also provides an air conditioner, comprising the above oxygen generating device.

[0016] The oxygen production device and control method thereof and the air conditioner provided by the present invention have the following beneficial effects:

[0017] By arranging an intake heat exchange pipe section on the intake pipe and an exhaust heat exchange pipe section on the exhaust pipe, and forming a heat exchange connection between the intake heat exchange pipe section and the exhaust heat exchange pipe section, the intake airflow with a lower temperature can be used to cool the exhaust airflow with a higher temperature during the operation of the air compressor, thereby effectively improving the oxygen production efficiency of the subsequent oxygen production molecular sieve. At the same time, since the intake airflow velocity is greater than the natural heat dissipation of the pipeline, the cooling effect of the intake airflow on the exhaust airflow can be improved, and the pipeline lengths of the intake pipe and the exhaust pipe do not need to be set too large, which effectively reduces the overall size of the oxygen production device, makes the device structure more compact, reduces the demand for installation space, and does not need to be specifically set on the exhaust pipe. A special cooling device (cooling component) is reduced, thereby reducing the overall preparation cost of the oxygen production device;

[0018] The intake heat exchange pipe section and the exhaust heat exchange pipe section form a pipe sleeve structure. Since one surrounds the radial outer side of the other, the heat exchange area of ​​the airflow between the two can be increased to the maximum extent, thereby ensuring rapid heat exchange between the intake airflow and the exhaust airflow, thereby ensuring effective cooling of the exhaust airflow;

[0019] The air intake heat exchange pipe section is mounted on the radial outer side of the exhaust heat exchange pipe section. On the one hand, the sealing and integrity of the high-pressure pipeline of the exhaust heat exchange pipe section can be ensured. On the other hand, the larger surface area of ​​the radial outer circumferential wall of the air intake heat exchange pipe section can be fully utilized, so that multiple air inlets can be set to increase the air intake volume of the air compressor.

[0020] The drying medium is further integrated in the heat exchange module, and the drying medium is arranged in the annular gap formed between the air intake heat exchange pipe section and the exhaust heat exchange pipe section, so that the air intake airflow is dried by the drying medium while ensuring the air intake of the air compressor, and the structure is simple and compact;

[0021] By setting the air intake pipe and the exhaust pipe in two parallel ways, and setting the on-off valves on each pipe, the air intake path and the exhaust path of the air compressor can be rotated by controlling the on-off of different on-off valves (i.e., state switching), so that the alternating circulation of different airflow paths can be realized, and then the high-temperature exhaust airflow in the exhaust pipe of the air compressor can be used to dry and heat the drying medium in the heat exchange module on the path, restore the water absorption capacity of the drying medium, and thus improve the service life of the drying medium. It should be noted that at this time, the moisture adsorbed in the drying medium dried by the high temperature of the exhaust airflow is converted into water vapor and dissipated to the external environment through the aforementioned air inlet. Based on this purpose, the aforementioned air inlet is provided with multiple and no corresponding pipelines, that is, the open structure is adopted, which is conducive to the rapid dissipation of moisture in the drying process of the drying medium while facilitating the air intake; and the use of the high-temperature heat of the exhaust gas to dry the drying medium can also achieve the purpose of cooling the exhaust airflow to a certain extent, realizing energy recovery, energy saving and environmental protection, while improving the adsorption performance of the oxygen-making molecular sieve, improving the oxygen-making efficiency, and improving the service life of the oxygen-making molecular sieve. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0023] Figure 1 is a schematic diagram of the system principle of the oxygen production device in an embodiment of the present invention;

[0024] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of the heat exchange module;

[0025] Figure 3 yes Figure 2 A schematic longitudinal section diagram of a heat exchange module in FIG.

[0026] Figure 4 yes Figure 2 A schematic cross-sectional view of a heat exchange module in FIG.

[0027] Figure 5 yes Figure 1 Schematic diagram of the oxygen production device in the upper branch air intake (air intake dehumidification) and the lower branch exhaust (drying medium drying dehumidification exhaust air flow cooling);

[0028] Figure 6 yes Figure 1Schematic diagram of the oxygen production device in the state of suction in the lower branch (intake dehumidification) and exhaust in the upper branch (drying medium drying dehumidification exhaust air flow cooling).

[0029] The accompanying drawings are marked as follows:

[0030] 1. Air compressor; 11. Intake pipe; 111. Intake heat exchange pipe section; 112. Air inlet; 113. Air outlet; 12. Exhaust pipe; 121. Exhaust heat exchange pipe section; 2. Oxygen-generating molecular sieve; 3. Drying medium; 41. First electromagnetic on-off valve; 42. Second electromagnetic on-off valve; 43. Third electromagnetic on-off valve; 44. Fourth electromagnetic on-off valve; 5. Heat exchange module. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0033] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90° or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0034] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0035] See also Figures 1 to 6 As shown, according to an embodiment of the present invention, an oxygen production device is provided, including an air compressor 1 and an oxygen production molecular sieve 2, the air compressor 1 has an intake pipe 11 and an exhaust pipe 12, the outlet of the exhaust pipe 12 is connected to the inlet of the oxygen production molecular sieve 2, it can be understood that the outlet of the oxygen production molecular sieve 2 is also the oxygen supply port, the intake pipe 11 has an intake heat exchange pipe section 111, the exhaust pipe 12 has an exhaust heat exchange pipe section 121, the intake heat exchange pipe section 111 is heat exchanged with the exhaust heat exchange pipe section 121 so that the intake air flow flowing in the intake heat exchange pipe section 111 cools the exhaust air flow flowing in the exhaust heat exchange pipe section 121, it can be understood that the heat exchange connection, that is, the intake heat exchange pipe section 111 and the exhaust heat exchange pipe section 121 can form a higher heat conduction between each other, for example, the two share a wall surface or are in direct contact through their respective pipe walls or are in indirect contact via a high thermal conductivity medium (such as thermal conductive silica gel, etc.).

[0036] In this technical solution, an intake heat exchange pipe section 111 is provided on the intake pipe 11, and an exhaust heat exchange pipe section 121 is provided on the exhaust pipe 12, and a heat exchange connection is formed between the intake heat exchange pipe section 111 and the exhaust heat exchange pipe section 121, so that the exhaust airflow with a higher temperature can be cooled by utilizing the intake airflow with a lower temperature during the operation of the air compressor 1, thereby effectively improving the oxygen production efficiency of the subsequent oxygen production molecular sieve 2. At the same time, since the intake airflow velocity is greater than the natural heat dissipation of the pipeline, the cooling effect of the intake airflow on the exhaust airflow can be improved, and the pipeline lengths of the intake pipe 11 and the exhaust pipe 12 do not need to be set too large, which effectively reduces the overall size of the oxygen production device, makes the device structure more compact, reduces the demand for installation space, and does not need to be specifically provided with a special cooling device (cooling component) on the exhaust pipe 12, thereby reducing the overall preparation cost of the oxygen production device.

[0037] See Figures 2 to 4 As shown, in some embodiments, a pipe-in-pipe structure is formed between the intake heat exchange pipe segment 111 and the exhaust heat exchange pipe segment 121, that is, the intake heat exchange pipe segment 111 and the exhaust heat exchange pipe segment 121 are sleeved one on the radial outside of the other.

[0038] This technical solution forms a tube-in-tube structure with the intake heat exchange pipe section 111 and the exhaust heat exchange pipe section 121. Since one surrounds the radial outside of the other, the heat exchange area of ​​the airflow between the two can be maximized, thereby ensuring rapid heat exchange between the intake airflow and the exhaust airflow, thereby ensuring effective cooling of the exhaust airflow.

[0039] As a preferred embodiment, the air intake heat exchange pipe section 111 is sleeved on the radially outer side of the exhaust heat exchange pipe section 121, and the pipe wall of the air intake heat exchange pipe section 111 has a plurality of air inlets 112 ( Figure 2 Only one air inlet 112 is shown).

[0040] In this technical solution, the intake heat exchange pipe section 111 is mounted on the radial outer side of the exhaust heat exchange pipe section 121. On the one hand, it can ensure the sealing and integrity of the high-pressure pipeline of the exhaust heat exchange pipe section 121. On the other hand, it can make full use of the larger surface area of ​​the radial outer circumferential wall of the intake heat exchange pipe section 111, so that multiple air inlets 112 can be set to increase the intake volume of the air compressor 1.

[0041] As a preferred embodiment, the air intake heat exchange pipe section 111 and the exhaust heat exchange pipe section 121 form a heat exchange module 5 with an independent structure. Figure 2As shown, the heat exchange module 5 is an independent integral structure formed by the aforementioned air intake heat exchange pipe segment 111 and the exhaust heat exchange pipe segment 121, and has an interface that can be detachably connected to other pipe segments of the exhaust pipe 12 and an interface that can be detachably connected to other pipe segments of the air intake pipe 11, so that it can be assembled with other pipelines as an independent structural module, and the assembly is extremely convenient, and it is convenient to maintain the heat exchange module 5. Specifically, referring to FIG3, for the air intake heat exchange pipe segment 111, its two ends are respectively an air inlet 112 and an air outlet 113 that are connected to other pipe segments of the air intake pipe 11, and in a preferred embodiment, the air inlet 112 does not need to be connected to other pipe segments of the air intake pipe 11, that is, the air inlet 112 can be exposed to the air, which further simplifies the pipeline design.

[0042] In an embodiment not shown in the drawings, the air inlets 112 are arranged at intervals in the circumferential direction around the air intake heat exchange pipe section 111 , and are arranged in multiple circles along the axial direction of the air intake heat exchange pipe section 111 .

[0043] In this technical solution, the air intake area can be further increased by providing a plurality of air intake ports 112 and distributing them at intervals in the axial direction and the circumferential direction of the air intake heat exchange pipe section 111 .

[0044] A corresponding drying device should be provided on the intake pipe 11 to dry and absorb the moisture in the intake air flow. In the prior art, a separate drying device is mostly used. Although the separately provided drying device can achieve the purpose of drying the intake air flow, the independently configured structure makes the structure of the oxygen production device less compact and also increases the overall cost of the oxygen production device. Therefore, as a preferred embodiment, an annular gap (not marked in the figure) is formed between the intake heat exchange pipe section 111 and the exhaust heat exchange pipe section 121. A drying medium 3 is provided in the annular gap. In principle, the drying medium 3 can absorb moisture in the air. Preferably, a drying medium (desiccant) that physically absorbs moisture is selected, such as a solid formed by silica particles (the particle size should meet the relevant requirements of water absorption rate), so as to dry it and restore its moisture adsorption capacity, thereby increasing the service life of the drying medium 3 and further reducing the maintenance cost. It can be understood that the drying medium 3 is an annular body at this time.

[0045] In this technical solution, the drying medium 3 is further integrated in the heat exchange module 5, and the drying medium 3 is arranged in the annular gap formed between the intake heat exchange pipe section 111 and the exhaust heat exchange pipe section 121. While ensuring the intake of the air compressor 1, the intake airflow is also dried by the drying medium 3, and the structure is simple and compact.

[0046] In some embodiments, two of the air intake pipe 11 and two of the air exhaust pipe 12 are respectively provided, the two air intake pipes 11 are provided in parallel, the two air exhaust pipes 12 are provided in parallel, and each of the air intake pipes 11 and each of the air exhaust pipes 12 is respectively connected in series with an on-off valve (not marked in the figure), for example Figure 1 A first electromagnetic on-off valve 41 , a second electromagnetic on-off valve 42 , a third electromagnetic on-off valve 43 and a fourth electromagnetic on-off valve 44 are shown.

[0047] In this technical solution, the intake pipe 11 and the exhaust pipe 12 are respectively arranged as two parallel pipes, and an on-off valve is correspondingly arranged on each pipe, so that the intake path and the exhaust path of the air compressor 1 can be rotated by controlling the on and off (that is, state switching) of different on-off valves, so that the alternating circulation of different air flow paths can be achieved, and then the higher temperature exhaust gas flow in the exhaust pipe 12 of the air compressor 1 can be used to dry and heat the drying medium 3 in the heat exchange module 5 on the path, thereby restoring the water absorption capacity of the drying medium 3 and improving the service life of the drying medium 3. It should be noted that, at this time, the moisture adsorbed in the drying medium 3 dried by the high temperature of the exhaust airflow is converted into water vapor and dissipated into the external environment through the aforementioned air inlet 112. Based on this purpose, the aforementioned air inlet 112 is provided with multiple and no corresponding pipelines, that is, an open structure is adopted, which is conducive to the suction and the rapid dissipation of moisture in the drying process of the drying medium 3; and the use of the high-temperature heat of the exhaust gas to dry the drying medium 3 can also achieve the purpose of cooling the exhaust airflow to a certain extent, realize energy recovery, energy saving and environmental protection, while improving the adsorption performance of the oxygen-producing molecular sieve 2, improving the oxygen production efficiency, and prolonging the service life of the oxygen-producing molecular sieve 2.

[0048] In some embodiments, the exhaust heat exchange pipe segment 121 is constructed with a flow hole (not shown in the figure) that runs through the inside and outside of the exhaust heat exchange pipe segment 121, and part of the exhaust gas flow can enter the annular gap through the flow hole. It can be understood that the aperture of the aforementioned flow hole should not be too large to prevent excessive bypass of the exhaust gas flow from causing excessive reduction in the gas flow pressure in the exhaust pipe 12. In a specific embodiment, the through hole diameter of the exhaust heat exchange pipe segment 121 is D, and the aperture of the flow hole is d, 0<d≤D / 30. Of course, the specific verticality can be reasonably selected based on the actual detection results.

[0049] In this technical solution, part of the exhaust gas flow is introduced into the annular gap through the flow holes, so that the high temperature characteristics of the exhaust gas flow can be used to dry the moisture in the drying medium 3 to restore its water absorption and drying performance. At the same time, this part of the diverted exhaust gas flow can be used to quickly guide the evaporated water vapor to the outside through each air inlet 112, thereby improving the drying efficiency of the drying medium 3.

[0050] According to an embodiment of the present invention, there is also provided a control method for the oxygen production device as described above, comprising the following steps:

[0051] The real-time humidity of the drying medium 3 provided in each of the air intake heat exchange pipe segments 111 is obtained. At this time, it can be understood that the oxygen production device is also provided with a humidity sensor capable of detecting the real-time humidity of the drying medium 3. The humidity sensor can be specifically fixed on the outer wall surface of the air intake heat exchange pipe segment 111 and its detection head extends into the aforementioned annular gap;

[0052] When the real-time humidity is higher than a preset humidity value (which can be reasonably selected according to the test), the on-off valve corresponding to the intake heat exchange pipe section 111 is controlled to be in the cut-off state, the on-off valve corresponding to the exhaust heat exchange pipe section 121 connected to the intake heat exchange pipe section 111 for heat exchange is controlled to be in the on state, and the on-off valve corresponding to another intake heat exchange pipe section 111 is controlled to be in the on state, and the on-off valve corresponding to another exhaust heat exchange pipe section 121 is controlled to be in the cut-off state, see Figure 5 and Figure 6 For the sake of clarity, the definition is Figure 5 The upper air intake pipe 11 and the exhaust pipe 12 in the shown position are the first set of pipes, which are located in Figure 5 The lower air intake pipe 11 and the exhaust pipe 12 in the direction shown are the second set of pipes, as shown in FIG. Figure 5 As shown, at this time, the humidity sensor detects that the real-time humidity of the drying medium 3 in the second group of pipelines exceeds the preset humidity value, that is, the humidity of the drying medium 3 in the second group of pipelines is too high and loses the moisture adsorption function. At this time, the first electromagnetic on-off valve 41 and the fourth electromagnetic on-off valve 44 are controlled to be in the on state, and the second electromagnetic on-off valve 42 and the third electromagnetic on-off valve 43 are controlled to be in the off state, so that the suction pipe 11 in the first group of pipelines is turned on to inhale (the exhaust pipe 12 is cut off to prevent the reduction of the water absorption and drying performance of the drying medium 3), and the exhaust pipe 12 in the second group of pipelines is turned on to exhaust, and the suction pipe 11 is cut off and does not inhale. At this time, the drying medium 3 in the pipeline will be heated and dried by the exhaust airflow with a higher temperature, and the water absorption and drying performance is restored; for the same reason, see Figure 6When the humidity of the drying medium 3 in the first group of pipelines is too high and loses its moisture absorption function, the first electromagnetic on-off valve 41 and the fourth electromagnetic on-off valve 44 are controlled to be in the cut-off state, and the second electromagnetic on-off valve 42 and the third electromagnetic on-off valve 43 are controlled to be in the on state, so that the air intake pipe 11 in the second group of pipelines is turned on to inhale (the exhaust pipe 12 is cut off to prevent the water absorption and drying performance of the drying medium 3 from being reduced), and the exhaust pipe 12 in the first group of pipelines is turned on to exhaust, and the air intake pipe 11 is cut off and does not inhale. At this time, the drying medium 3 in the pipeline will be heated and dried by the high-temperature exhaust airflow, and the water absorption and drying performance will be restored. In this way, the drying medium 3 in the first group of pipelines and the second group of pipelines are alternately and repeatedly absorbed and dried, that is, the alternation of air drying and desiccant drying is realized, which can significantly increase the service life of the drying medium 3 and reduce maintenance costs. It is also worth mentioning that the technical solution obtains the real-time humidity of the drying medium 3 and automatically controls the flow paths of the intake airflow and the exhaust airflow, thereby achieving timely drying of each corresponding drying medium 3, ensuring the water absorption and drying performance of the drying medium 3, and effectively preventing the oxygen-producing molecular sieve 2 from powdering or agglomerating due to moisture, thereby extending the service life of the oxygen-producing molecular sieve 2, reducing the frequency of replacing the oxygen-producing molecular sieve 2, simplifying the maintenance process, and reducing the user's maintenance cost.

[0053] In another feasible embodiment, when the humidity of the external environment is low (lower than the level required for water absorption and drying), the intake air flow of the air compressor 1 objectively does not need to be dried, and each on-off valve (the aforementioned first electromagnetic on-off valve 41, the second electromagnetic on-off valve 42, the third electromagnetic on-off valve 43 and the fourth electromagnetic on-off valve 44) can be controlled to be in an on state, thereby realizing an operation mode in which the dual intake pipes 11 and the dual exhaust pipes 12 simultaneously intake and exhaust air, which can significantly increase the intake and exhaust volumes of the compressor. At the same time, the intake air flow and the exhaust air flow perform heat exchange at the corresponding heat exchange module 5, and the intake air flow is used to cool the exhaust air flow.

[0054] According to an embodiment of the present invention, there is also provided an air conditioner, comprising the above-mentioned oxygen production device, which is arranged in an outdoor unit of the air conditioner. It can be understood that the oxygen supply port of the oxygen production device extends from the outdoors to the indoor unit on the indoor side via an oxygen supply pipe, thereby achieving the purpose of regulating the temperature of the indoor space while supplying oxygen.

[0055] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. An oxygen production device, characterized in that: The invention comprises an air compressor (1) and an oxygen-producing molecular sieve (2); the air compressor (1) has an intake pipe (11) and an exhaust pipe (12); the outlet of the exhaust pipe (12) is connected to the inlet of the oxygen-producing molecular sieve (2); the intake pipe (11) has an intake heat exchange pipe section (111); the exhaust pipe (12) has an exhaust heat exchange pipe section (121); the intake heat exchange pipe section (111) is connected to the exhaust heat exchange pipe section (121) by heat exchange so that the intake air flow flowing in the intake heat exchange pipe section (111) cools the exhaust air flow flowing in the exhaust heat exchange pipe section (121).

2. The oxygen production device according to claim 1, characterized in that: A pipe-in-pipe structure is formed between the air intake heat exchange pipe section (111) and the air exhaust heat exchange pipe section (121).

3. The oxygen production device according to claim 2, characterized in that: The intake heat exchange pipe section (111) is sleeved on the radial outer side of the exhaust heat exchange pipe section (121), and a plurality of air inlets (112) are provided on the pipe wall of the intake heat exchange pipe section (111); and / or the intake heat exchange pipe section (111) and the exhaust heat exchange pipe section (121) form a heat exchange module (5) of an independent structure.

4. The oxygen production device according to claim 3, characterized in that: The air inlets (112) are arranged at intervals in the circumferential direction around the air intake heat exchange pipe section (111), and are arranged in multiple circles along the axial direction of the air intake heat exchange pipe section (111).

5. The oxygen production device according to claim 3, characterized in that: An annular gap is formed between the intake heat exchange pipe section (111) and the exhaust heat exchange pipe section (121), and a drying medium (3) is provided in the annular gap.

6. The oxygen production device according to claim 5, characterized in that: Two of the intake pipes (11) and two of the exhaust pipes (12) are respectively provided, the two intake pipes (11) are arranged in parallel, the two exhaust pipes (12) are arranged in parallel, and each of the intake pipes (11) and each of the exhaust pipes (12) is respectively connected in series with an on-off valve.

7. The oxygen production device according to claim 5, characterized in that: The exhaust heat exchange pipe section (121) is provided with a flow hole penetrating the inside and the outside thereof, and part of the exhaust gas flow can enter the annular gap through the flow hole.

8. The oxygen production device according to claim 7, characterized in that: The diameter of the through hole of the exhaust heat exchange pipe section (121) is D, the aperture of the through hole is d, and 0<d≤D / 30.

9. A control method for an oxygen production device as claimed in claim 8, characterized in that: The steps include: Acquiring the real-time humidity of the drying medium (3) arranged in each of the air intake heat exchange pipe sections (111); When the real-time humidity is higher than a preset humidity value, the on-off valve corresponding to the intake heat exchange pipe section (111) is controlled to be in an off state, the on-off valve corresponding to the exhaust heat exchange pipe section (121) connected to the intake heat exchange pipe section (111) for heat exchange is controlled to be in an on state, the on-off valve corresponding to another intake heat exchange pipe section (111) is controlled to be in an on state, and the on-off valve corresponding to another exhaust heat exchange pipe section (121) is controlled to be in an off state.

10. An air conditioner, characterized in that: An oxygen production device comprising the oxygen production device according to any one of claims 1 to 8.

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