Combined air conditioner

Abstract

The invention discloses a combined air conditioning unit which comprises an oxygen generation module, an air conditioning module and a control module. The mixing section is provided with an oxygen inlet and further provided with a fresh air inlet or / and a return air inlet; oxygen generated by the oxygen generation module enters the mixing section through the oxygen inlet; a surface cooling section; the air supply section communicates with the surface cooling section, is provided with an air supply outlet and is used for supplying air into a room; the control module is configured to obtain the air supply volume variation of the air supply outlet; the oxygen production amount variation corresponding to the air supply amount variation is obtained; and controlling the operation of the oxygen generation module according to the oxygen generation amount variation. According to the combined air conditioning unit, operation of the oxygen generation module is controlled according to the oxygen generation amount variable quantity, accurate control over the oxygen generation module is achieved, the oxygen generation module can reach the corresponding oxygen generation amount variable quantity, and therefore the oxygen concentration at the air supply outlet is within the set concentration range, and finally the indoor oxygen concentration is kept within the set concentration range; the technical problem that the oxygen generation module cannot be accurately controlled in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioning, in particular to a combined air conditioner. Background Art

[0002] The modular air-conditioning unit is an air-handling device assembled from various air-handling functional sections. The modular air-handling unit includes a mixing section, a filtering section, a surface cooling section, a hot water / steam coil section, a humidifying section, a spray section, a heat recovery section, a fan section, a flow-balancing section, a muffler section, etc. The modular air-conditioning unit is a full air-handling product developed for various occasions such as general air-conditioning, industrial plants, exhibition halls, and medical purification.

[0003] Currently, the main way to improve indoor oxygen concentration is to exchange fresh air through fresh air air conditioning. This method is similar to opening windows for ventilation. It mainly exchanges indoor and outdoor air to make the oxygen concentration infinitely close to the atmospheric oxygen concentration (20.9%). It cannot reach the forest oxygen level that makes people more comfortable (about 21.5%).

[0004] In patent document CN1584425A, the air is processed by a combined air conditioner to a suitable temperature and humidity, and then mixed with the oxygen prepared by the oxygen generator and sent to the air-conditioned room. The oxygen generator adopts pressure swing adsorption oxygen generators such as PSA, VSA and VPSA and membrane separation air oxygen generators, and an oxygen concentration detector is installed indoors to detect the oxygen concentration in the indoor air. When the indoor oxygen concentration is lower than the specified value, the oxygen generator starts, and when the indoor oxygen concentration is higher than a certain value, the oxygen generator stops running or runs under low load. The air conditioning system requires the air outlet of the combined air conditioner to be mixed with the oxygen prepared by the oxygen generator again, which increases the length of the pipeline. Moreover, the start and stop of the oxygen generator is controlled according to the indoor oxygen concentration, and the operation of the oxygen generator cannot be accurately controlled. Summary of the invention

[0005] The present invention provides a combined air-conditioning unit, which solves the technical problem in the prior art that the oxygen production equipment cannot be accurately controlled.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme:

[0007] The present invention provides a combined air conditioning unit, comprising:

[0008] An oxygen production module, which is used to produce oxygen;

[0009] The mixing section has an oxygen inlet and a fresh air inlet and / or a return air inlet; the oxygen generated by the oxygen production module enters the mixing section through the oxygen inlet;

[0010] A surface cooling section, which is connected to the mixing section;

[0011] An air supply section, which is in communication with the surface cooling section and has an air supply port for supplying air to the room;

[0012] The control module is configured to: obtain a change in the air supply volume of the air supply port; obtain a change in the oxygen production volume corresponding to the change in the air supply volume; and control the operation of the oxygen production module according to the change in the oxygen production volume.

[0013] In some embodiments of the present application, the control module is further configured to:

[0014] The corresponding relationship between the change in the air supply volume of the preset air supply port and the change in the oxygen production volume of the oxygen production module;

[0015] According to the change in the air supply volume of the air supply port, the corresponding relationship is queried to obtain the corresponding change in the oxygen production volume.

[0016] In some embodiments of the present application, a fan is provided in the air supply section; the frequency of the fan is positively correlated with the air supply volume of the air supply port;

[0017] The control module is further configured to: obtain a frequency change of the fan; obtain a frequency change of the oxygen production module corresponding to the frequency change of the fan; and control the operation of the oxygen production module according to the frequency change of the oxygen production module.

[0018] In some embodiments of the present application, the control module is further configured to:

[0019] The corresponding relationship between the frequency change of the preset fan and the frequency change of the oxygen production module;

[0020] According to the frequency change of the fan, the corresponding relationship is queried to obtain the frequency change of the corresponding oxygen production module.

[0021] In some embodiments of the present application, the control module is further configured to:

[0022] Obtaining the air supply volume of the air supply outlet;

[0023] Obtaining the oxygen production capacity of the oxygen production module corresponding to the air supply capacity of the air supply port;

[0024] The operation of the oxygen production module is controlled according to the oxygen production amount.

[0025] In some embodiments of the present application, the control module is further configured to:

[0026] The correspondence between the air supply volume of the preset air supply port and the oxygen production volume of the oxygen production module;

[0027] According to the air supply volume of the air supply port, the corresponding relationship is queried to obtain the corresponding oxygen production volume.

[0028] In some embodiments of the present application, a fan is provided in the air supply section; the frequency of the fan is positively correlated with the air supply volume of the air supply port;

[0029] The control module is further configured to: obtain the frequency of the fan; obtain the frequency of the oxygen production module corresponding to the frequency of the fan; and control the operation of the oxygen production module according to the frequency of the oxygen production module.

[0030] In some embodiments of the present application, the control module is further configured to:

[0031] The corresponding relationship between the preset fan frequency and the oxygen production module frequency;

[0032] According to the frequency of the fan, the corresponding relationship is queried to obtain the frequency of the corresponding oxygen production module.

[0033] In some embodiments of the present application, the control module is further configured to:

[0034] When the indoor oxygen concentration is lower than the lower limit of the set indoor concentration range, the frequency of controlling the oxygen production module is increased;

[0035] When the indoor oxygen concentration is higher than the upper limit of the set indoor concentration range, the frequency of controlling the oxygen production module is reduced;

[0036] When the indoor oxygen concentration is within the set indoor concentration range, the oxygen production module is controlled to maintain the current frequency.

[0037] In some embodiments of the present application, the oxygen production module is independently provided, and the oxygen generated by the module is transported to the mixing section via a gas pipeline.

[0038] The technical solution of the present invention has the following technical effects compared with the prior art: the combined air conditioning unit of the present invention obtains the change in the air supply volume of the air supply outlet of the air supply section; obtains the change in the oxygen production volume corresponding to the change in the air supply volume; controls the operation of the oxygen production module according to the change in the oxygen production volume, so that the oxygen production module can reach the corresponding oxygen production volume change, thereby making the oxygen concentration at the air supply outlet within the set concentration range, and finally keeping the indoor oxygen concentration within the set concentration range. The combined air conditioner of this embodiment controls the operation of the oxygen production module according to the change in the oxygen production volume, realizes precise control of the oxygen production module, and solves the technical problem that the oxygen production module cannot be precisely controlled in the prior art.

[0039] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0041] Figure 1 A schematic structural diagram of an embodiment of a combined air conditioner of the present invention;

[0042] Figure 2 It is a structural schematic diagram of another embodiment of the combined air conditioner of the present invention;

[0043] Figure 3 It is a structural schematic diagram of another embodiment of the combined air conditioner of the present invention;

[0044] Figure 4 A schematic structural diagram of an embodiment of a mixing section;

[0045] Figure 5 An oxygen production principle diagram of an embodiment of an oxygen production module;

[0046] Figure 6 It is a structural schematic diagram of an embodiment of an oxygen production module;

[0047] Figure 7 A flowchart of another embodiment of the steps executed by the control module of the air conditioning unit of the present invention;

[0048] Figure 8 A flowchart of another embodiment of the steps executed by the control module of the air conditioning unit of the present invention;

[0049] Fig. 9 A flowchart of another embodiment of the steps executed by the control module of the air conditioning unit of the present invention;

[0050] Fig.10 A flowchart of another embodiment of the steps executed by the control module of the air conditioning unit of the present invention;

[0051] Fig.11 A flowchart of another embodiment of the steps executed by the control module of the air conditioning unit of the present invention;

[0052] Fig.12 A flowchart of another embodiment of the steps executed by the control module of the air conditioning unit of the present invention;

[0053] Fig.13 A flowchart of another embodiment of the steps executed by the control module of the air conditioning unit of the present invention;

[0054] Fig.14A flowchart of another embodiment of the steps executed by the control module of the air conditioning unit of the present invention;

[0055] Fig.15 It is the feedback control flow chart of the fan frequency to the oxygen production module;

[0056] Fig.16 A flowchart of another embodiment of the steps executed by the control module of the air conditioning unit of the present invention;

[0057] Fig.17 The present invention is a flowchart of another embodiment of the steps executed by the control module of the air conditioning unit.

[0058] Reference numerals:

[0059] 11. Mixing section; 11-1. Fresh air inlet; 11-2. Return air inlet; 11-3. Oxygen inlet;

[0060] 12. Filtration section; 13. Surface cooling section; 14. Humidification section; 15. Silence section; 16. Maintenance section;

[0061] 17. Air supply section; 17-1. Air supply outlet; 17-2. Fan;

[0062] 20. Oxygen production module;

[0063] 21. Air purification device; 22. Muffler; 23. Air compressor; 24. Molecular sieve tower;

[0064] 25. Gas collecting tank; 26. Gas transmission pipe; 27. Exhaust valve. DETAILED DESCRIPTION

[0065] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0066] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0067] The terms "first", "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0068] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0069] In the present invention, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0070] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0071] The air conditioner performs the refrigeration cycle and heating cycle of the air conditioner by using a compressor, a condenser, an expansion valve and an evaporator, and the controller performs control to realize the flow control of the refrigerant and the opening control of the expansion valve, etc. The refrigeration cycle and heating cycle include a series of processes involving compression, condensation, expansion and evaporation, and supply refrigerant to the air that has been conditioned and heat exchanged.

[0072] The compressor compresses the refrigerant gas in a high temperature and high pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0073] The expansion valve expands the high-temperature and high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigeration effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. In the entire cycle, the air conditioner can adjust the temperature of the indoor space.

[0074] The air conditioner outdoor unit refers to a part of a refrigeration cycle including a compressor and an outdoor heat exchanger, the air conditioner indoor unit includes an indoor heat exchanger, and the expansion valve may be provided in the air conditioner outdoor unit or the indoor unit.

[0075] The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioner functions as a heater in a heating mode, and when the indoor heat exchanger functions as an evaporator, the air conditioner functions as a cooler in a cooling mode.

[0076] The combined air conditioner of this embodiment includes an oxygen production module 20, a mixing section 11, a surface cooling section 13, an air supply section 17, a control module, etc. Figures 1 to 3 shown.

[0077] The oxygen production module 20 is used to produce oxygen.

[0078] The mixing section 11 has an oxygen inlet 11-3, and also has a fresh air inlet 11-1 and / or a return air inlet 11-2. The oxygen generated by the oxygen production module 20 enters the mixing section 11 through the oxygen inlet 11-3. Outdoor fresh air enters the mixing section 11 through the fresh air inlet 11-1, and indoor return air enters the mixing section 11 through the return air inlet 11-2. The mixing section 11 mixes the incoming oxygen, outdoor fresh air and / or indoor return air.

[0079] The surface cooling section 13 is connected to the mixing section 11. The surface cooling section 13 is used to cool or heat the airflow passing therethrough.

[0080] The air supply section 17 is connected to the surface cooling section 13 and has an air supply port 17-1 for supplying air to the room. The air supply section 17 has a fan 17-2, which rotates to drive the air flow through the air supply port 17-1 to blow into the room.

[0081] In some embodiments of the present application, a filter section 12 is provided between the mixing section 11 and the surface cooling section 13 for filtering the airflow. A humidification section 14, a muffler section 15, and a maintenance section 16 are provided between the surface cooling section 13 and the air supply section 17; the humidification section 14 is used to heat the airflow, the muffler section 15 is used to eliminate noise, and the maintenance section 16 is used to perform maintenance on the combined air conditioner.

[0082] Therefore, the combined air conditioner includes a mixing section 11, a filtering section 12, a surface cooling section 13, a humidifying section 14, a muffler section 15, a maintenance section 16, and an air supply section 17, which are sequentially arranged along the air flow direction. Each functional section processes the air with a corresponding function.

[0083] The high-concentration oxygen prepared by the oxygen production module 20 enters the mixing section 11 and mixes with the fresh air and / or the return air. The mixed gas is filtered by the filtering section 12, cooled or heated by the surface cooling section 13, humidified by the humidifying section 14, silenced by the silencing section 15, and enters the air supply section 17 by the maintenance section 16, and then is delivered into the room by the fan 17-2.

[0084] The high-concentration oxygen produced by the oxygen production module 20 may contain water vapor or other gases. If it is placed at the rear end of the combined air conditioner, the water vapor or other gases mixed therein may not be effectively processed. Therefore, the oxygen inlet 11-3 is placed in front as much as possible, so that it can be centrally processed with the air entering the unit through various functional sections and can be fully mixed with the air entering the unit.

[0085] like Figure 1 The combined air conditioner shown is a mixed air unit, and the mixing section 11 has a fresh air inlet 11-1, a return air inlet 11-2 and an oxygen inlet 11-3.

[0086] like Figure 2 The combined air conditioner shown is a fresh air unit, and the mixing section 11 has a fresh air inlet 11-1 and an oxygen inlet 11-3, but does not have a return air inlet.

[0087] like Figure 3 The combined air conditioner shown is a full return air unit, and the mixing section 11 has a return air inlet 11-2 and an oxygen inlet 11-3, but no fresh air inlet.

[0088] If there is no oxygen produced by the oxygen production module 20 entering the mixing section 11 through the oxygen inlet 11-3, even the fresh air unit can only achieve an oxygen concentration of the air supply close to or reaching the atmospheric oxygen concentration (20.9%), and cannot reach the forest oxygen concentration (21.5%). If there is no oxygen production module 20 and oxygen inlet 11-3, the oxygen concentration of the air supply of the mixed air unit and the full return air unit may be lower. Therefore, no matter which type of air conditioning unit, if the oxygen concentration of the air supply needs to reach the forest oxygen concentration, it needs to be equipped with an oxygen production module.

[0089] Since the internal space of the combined air conditioning unit may not match the size of the oxygen production module, it is inconvenient to install the oxygen production module directly in the unit. Moreover, if the oxygen production module is installed inside the air conditioning unit, it needs to inhale air when producing oxygen, which will affect the air intake and air supply of the combined air conditioning fan.

[0090] Therefore, in some embodiments of the present application, in order to further increase practicality, strong applicability, and convenient installation and maintenance, the oxygen production module 20 is independently provided, and the oxygen produced by the oxygen production module 20 is transported to the mixing section 11 through the gas delivery pipe 26. The gas delivery pipe 26 passes through the oxygen inlet 11-3 and enters the mixing section 11, see Figure 4 shown.

[0091] An air delivery pipe 26 is installed inside the modular air conditioner unit, and the oxygen production module 20 is installed outside the modular air conditioner unit. That is, the high-concentration oxygen prepared by the oxygen production module 20 is sent to the interior of the modular air conditioner (i.e., the mixing section) through the air delivery pipe 26, mixed with the fresh air and the return air, and then sent to the room after being filtered, cooled, humidified, etc. This can effectively fit modular air conditioners of any size, and installation and maintenance are also more convenient.

[0092] In some embodiments of the present application, the oxygen production module uses pressure swing adsorption (PSA) to produce oxygen, that is, air is compressed into an adsorption tower equipped with molecular sieves to selectively adsorb impurities such as nitrogen, carbon dioxide and water in the air, thereby obtaining 90% pure oxygen.

[0093] The oxygen production module has an air compressor. The frequency of the oxygen production module is the frequency of the air compressor. The higher the frequency of the air compressor, the greater the oxygen production capacity.

[0094] The oxygen production module includes an air purification device 21, a silencer 22, an oil-free air compressor 23, a molecular sieve tower 24, a gas collecting tank 25, etc. Figure 5 , Figure 6 shown.

[0095] The air purification device 21 is used for purifying the air.

[0096] The silencer 22 is used to eliminate noise.

[0097] The air compressor 23 is used to compress the air.

[0098] The molecular sieve tower 24 has an air inlet, an oxygen outlet, and a nitrogen outlet; the air inlet is used to receive air compressed by the air compressor 23; the oxygen outlet is used to discharge oxygen; and the nitrogen outlet is used to discharge nitrogen.

[0099] The gas collecting tank 25 has an air inlet connected to the oxygen outlet of the molecular sieve tower 24 ; the gas outlet of the gas collecting tank 25 is connected to the gas pipeline 26 , and the gas pipeline 26 is connected to the oxygen inlet 11 - 3 of the mixing section 11 .

[0100] The outside air first passes through the air purification device 21 to filter out impurities of a certain particle size, thereby ensuring the operational reliability of the air compressor 23. Then, after noise reduction through the muffler 22, it enters the air compressor 23, which compresses the air and outputs the compressed air to the molecular sieve tower 24. Compressing nitrogen into high pressure can increase the adsorption efficiency of the molecular sieve tower 24. Most of the nitrogen passes through the molecular sieve tower 24 and is discharged from the oxygen production module through the exhaust valve 27, while the remaining higher concentration of oxygen is output after being stabilized by the gas collecting tank 25 and supplied to the room.

[0101] The control module is used to control the operation of the entire combined air conditioner.

[0102] The control module is configured to: obtain the change in air supply volume of the air supply outlet of the air supply section; obtain the change in oxygen production volume corresponding to the change in air supply volume; and control the operation of the oxygen production module according to the change in oxygen production volume.

[0103] Therefore, the control module performs the following steps, see Figure 7 described.

[0104] Step S11: Obtain the change in air supply volume of the air supply outlet of the air supply section.

[0105] Step S12: Obtain the change in oxygen production amount corresponding to the change in air supply amount.

[0106] Step S13: Controlling the operation of the oxygen production module according to the change in oxygen production amount, so that the oxygen production module can reach the corresponding oxygen production amount change, thereby making the oxygen concentration at the air supply port within the set concentration range.

[0107] There is a one-to-one correspondence between the change in air supply volume and the change in oxygen production volume. When the air supply volume changes, the oxygen production volume of the oxygen production module also changes to ensure that the oxygen concentration of the outlet air remains unchanged.

[0108] The combined air conditioner of this embodiment obtains the change in air supply volume at the air supply outlet of the air supply section; obtains the change in oxygen production volume corresponding to the change in air supply volume; controls the operation of the oxygen production module according to the change in oxygen production volume, so that the oxygen production module can reach the corresponding oxygen production volume change amount, thereby making the oxygen concentration at the air supply outlet within the set concentration range, and finally keeping the indoor oxygen concentration within the set concentration range. The combined air conditioner of this embodiment controls the operation of the oxygen production module according to the change in oxygen production volume, realizes precise control of the oxygen production module, and solves the technical problem that the oxygen production module cannot be precisely controlled in the prior art.

[0109] The combined air conditioner of this embodiment is a combined air conditioner that can realize the oxygen production function. The mixing section receives the oxygen delivered by the oxygen production module and can be called the "oxygen-enriched section". By adding the oxygen-enriched section as a functional section, the oxygen concentration in the air supplied by the combined air conditioner is increased, thereby increasing the oxygen concentration in the air supply room. As a functional section of the combined air conditioner, the oxygen-enriched section is combined with other functional sections to form a unit.

[0110] The combined air conditioner of this embodiment does not need to change the main structure of the combined air conditioner, and will not affect other components in the air conditioner. However, the combined air conditioner products in the prior art do not have an oxygen production function and are not provided with an oxygen enrichment function section.

[0111] In the modular air conditioner of this embodiment, the oxygen prepared by the oxygen production module is mixed with the air inside the modular air conditioner and then sent into the room. The oxygen production module is combined in the modular air conditioner in the form of a functional segment, which does not affect the air supply pipeline of the air conditioner and does not need to increase the length of the pipeline. The modular air conditioner of this embodiment can control the oxygen concentration without installing an oxygen concentration sensor indoors to improve and maintain the stability of the oxygen concentration in the user's room.

[0112] The high-concentration oxygen (about 90%) of the oxygen production module can be mixed with the air in the combined air conditioner to achieve the purpose of increasing the oxygen concentration of the air outlet of the combined air conditioner and then increasing the oxygen concentration of the air supply room.

[0113] In some embodiments of the present application, the control module is further configured to perform the following steps: Figure 8 shown.

[0114] Step S21: preset a corresponding relationship between the change in the air supply volume of the air supply port and the change in the oxygen production volume of the oxygen production module.

[0115] Step S22: According to the change in the air supply volume of the air supply port, the corresponding relationship is queried to obtain the corresponding change in the oxygen production volume.

[0116] By presetting the corresponding relationship between the change in the air supply volume of the air supply port and the change in the oxygen production volume of the oxygen production module, and then querying the corresponding relationship, the corresponding change in the oxygen production volume can be directly obtained, thereby controlling the operation of the oxygen production module, which is simple, convenient and accurate.

[0117] In some embodiments of the present application, the control module is further configured to: obtain the frequency change of the fan; obtain the frequency change of the oxygen production module corresponding to the frequency change of the fan; and control the operation of the oxygen production module according to the frequency change of the oxygen production module.

[0118] The control module performs the following steps, see Fig. 9 shown.

[0119] Step S31: Obtain the frequency change of the fan.

[0120] Step S32: Obtain the frequency change of the oxygen production module corresponding to the frequency change of the fan.

[0121] Step S33: Control the operation of the oxygen production module according to the frequency change of the oxygen production module, so that the oxygen production module can reach a corresponding frequency change, thereby achieving a corresponding oxygen production amount change, and then making the oxygen concentration at the air supply port within a set concentration range.

[0122] The air supply section 17 is provided with a fan 17-2; the frequency of the fan is positively correlated with the air supply volume of the air supply port; the greater the fan frequency, the greater the air supply volume. When the fan frequency changes, the air supply volume also changes. By adjusting the fan frequency, the air supply volume can be adjusted.

[0123] The frequency of the oxygen production module is positively correlated with the oxygen production capacity; the greater the frequency, the greater the oxygen production capacity. When the frequency of the oxygen production module changes, the oxygen production capacity also changes. By adjusting the frequency of the oxygen production module, the oxygen production capacity can be adjusted.

[0124] The frequency change of the fan and the frequency change of the oxygen production module have a one-to-one correspondence. When the frequency of the fan changes, the frequency of the oxygen production module also changes to ensure that the oxygen concentration of the outlet air remains unchanged.

[0125] By designing steps S31 to S33, the fan frequency is easy to collect and the frequency change is easy to calculate. Moreover, the frequency control of the oxygen production module is simple. By adjusting the frequency of the oxygen production module, the corresponding frequency change is achieved, so that the frequency change of the oxygen production module corresponds to the frequency change of the fan, thereby making the oxygen concentration at the air supply port within the set concentration range, which is simple, convenient and easy to control.

[0126] In some embodiments of the present application, the control module is further configured to perform the following steps: Fig.10 shown.

[0127] Step S41: Preset the corresponding relationship between the frequency change of the fan and the frequency change of the oxygen production module.

[0128] Step S42: According to the frequency change of the fan, the corresponding relationship is queried to obtain the frequency change of the corresponding oxygen production module.

[0129] By presetting the corresponding relationship between the frequency change of the fan and the frequency change of the oxygen production module, and then querying the corresponding relationship, the frequency change of the corresponding oxygen production module can be directly obtained, thereby controlling the operation of the oxygen production module, which is simple, convenient and accurate.

[0130] In some embodiments of the present application, the control module is further configured to perform the following steps: Fig.11 shown.

[0131] Step S51: Obtain the air supply volume of the air supply port.

[0132] Step S52: Obtain the oxygen production capacity of the oxygen production module corresponding to the air supply capacity of the air supply port.

[0133] Step S53: Control the operation of the oxygen production module according to the obtained oxygen production amount, so that the oxygen production module reaches the corresponding oxygen production amount, thereby making the oxygen concentration at the air supply port within the set concentration range.

[0134] By designing steps S51 to S53, the air supply volume and the oxygen production volume have a one-to-one correspondence. The operation of the oxygen production module is controlled according to the oxygen production volume, so that the oxygen production module reaches the corresponding oxygen production volume to ensure that the oxygen concentration of the outlet air remains unchanged, which is simple and convenient.

[0135] In some embodiments of the present application, the control module is further configured to perform the following steps: Fig.12 shown.

[0136] Step S61: preset the corresponding relationship between the air supply volume of the air supply port and the oxygen production volume of the oxygen production module.

[0137] Step S62: query the corresponding relationship according to the air supply volume of the air supply port to obtain the corresponding oxygen production volume.

[0138] By presetting the correspondence between the air supply volume of the air supply port and the oxygen production volume of the oxygen production module, and then querying the correspondence, the corresponding oxygen production volume can be directly obtained, thereby controlling the operation of the oxygen production module, which is simple, convenient and accurate.

[0139] In some embodiments of the present application, the control module is further configured to: obtain the frequency of the fan; obtain the frequency of the oxygen production module corresponding to the frequency of the fan; and control the operation of the oxygen production module according to the obtained frequency of the oxygen production module so that the oxygen production module reaches the corresponding frequency.

[0140] The control module performs the following steps, see Fig.13 shown.

[0141] Step S71: Obtain the frequency of the fan.

[0142] Step S72: Obtain the frequency of the oxygen production module corresponding to the frequency of the fan.

[0143] Step S73: controlling the operation of the oxygen production module according to the obtained frequency of the oxygen production module, so that the oxygen production module reaches the corresponding frequency.

[0144] A fan is provided in the air supply section; the frequency of the fan is positively correlated with the air supply volume of the air supply port. The frequency of the oxygen production module is positively correlated with the oxygen production volume.

[0145] The frequency of the fan has a one-to-one correspondence with the frequency of the oxygen production module, so that the air supply volume and the oxygen production volume have a one-to-one correspondence.

[0146] By designing steps S71 to S73, the frequency of the fan is easily collected and the frequency control of the oxygen production module is simple. By adjusting the frequency of the oxygen production module, the frequency of the oxygen production module corresponds to the frequency of the fan, and then the air supply volume corresponds to the oxygen production volume, and then the oxygen concentration at the air supply port is within the set concentration range. This is simple, convenient and easy to control.

[0147] In some embodiments of the present application, the control module is further configured to perform the following steps: Fig.14 shown.

[0148] Step S81: preset the corresponding relationship between the frequency of the fan and the frequency of the oxygen production module.

[0149] Step S82: According to the frequency of the fan, the corresponding relationship is queried to obtain the frequency of the corresponding oxygen production module.

[0150] By presetting the correspondence between the frequency of the fan and the frequency of the oxygen production module, and then querying the correspondence, the frequency of the corresponding oxygen production module can be directly obtained, thereby controlling the operation of the oxygen production module, which is simple, convenient and accurate.

[0151] The control module of this embodiment includes an air conditioning controller and an oxygen production module controller. The air conditioning controller and the oxygen production module controller communicate with each other.

[0152] In order to achieve the required oxygen concentration, the oxygen production volume needs to be calculated based on the amount of oxygen added to the room, the oxygen consumption of personnel, the amount of oxygen leakage in the room, etc. That is:

[0153] Oxygen production = oxygen increase in the room + oxygen consumption by personnel + oxygen leakage in the room.

[0154] After the oxygen production is calculated, the oxygen concentration in the air supplied by the combined air conditioner to the room is also related to the air supply volume of the air conditioner. That is, the oxygen production calculated according to the above formula only corresponds to a certain oxygen concentration and the required oxygen production under a certain air supply volume. When the air supply volume of the air conditioner changes, in order to ensure the appropriate oxygen concentration, the oxygen production of the oxygen concentrator should also change accordingly.

[0155] When selecting a modular air conditioner, there is a rated air supply volume. Based on this rated air supply volume, the rated oxygen production volume of the oxygen production module can be calculated to meet the room oxygen concentration under the rated air supply volume. That is, under the rated air supply volume of the air conditioning unit and the rated oxygen production volume of the oxygen production module, the oxygen concentration in the air delivered to the room is a fixed value. However, the air volume of the modular air conditioner is generally adjustable, that is, the modular air conditioner equipped with a variable frequency motor (fan) can adjust the air supply volume by adjusting the frequency of the motor (fan). When the air supply volume changes, in order to maintain the oxygen concentration in the indoor room, the oxygen production volume needs to be adjusted accordingly, and the oxygen production volume of the oxygen production module is determined by the amount of air inhaled by the air compressor.

[0156] Therefore, based on the above conditions, the combined air conditioner of this embodiment proposes a control concept for the oxygen production amount, which is used to control the indoor oxygen concentration to remain in a fixed range when the air supply volume of the combined air conditioner changes. This control does not require the installation of an oxygen concentration sensor indoors to maintain the stability of the oxygen concentration in the user's room. That is: the combined air conditioner is equipped with a control cabinet that can detect the motor frequency. The control cabinet can detect the motor frequency and feed the motor frequency back to the oxygen production module controller. The oxygen production module controller calculates the required oxygen production according to the received motor frequency value, and adjusts the operating frequency of the air compressor to adjust the amount of air inhaled and thus change the oxygen production amount. The control diagram is shown in Fig.15 shown.

[0157] The specific steps are as follows: when the required air volume changes, the fan (variable frequency motor) in the modular air conditioner adjusts the frequency according to the required air volume to meet the required air volume. The modular air conditioner is equipped with a control cabinet, and the controller of the modular air conditioner and the controller of the oxygen production module are connected through the control cabinet. The frequency change of the variable frequency motor is transmitted to the oxygen production module through the control cabinet. After receiving the feedback, the oxygen production module calculates the frequency change of the oxygen production module air compressor caused by the frequency change of the variable frequency motor according to the built-in algorithm, and adjusts the air compressor frequency according to the change.

[0158] The logic of the built-in algorithm is: Since the change in the motor frequency in the combined air conditioner affects the change in the combined air conditioner's air supply volume, when the combined air conditioner's air supply volume changes, in order to ensure that the oxygen concentration of the air supply is a fixed value, the change in the amount of oxygen required is also easy to calculate. Since the oxygen concentration produced by the oxygen production module is a fixed value, the change in the amount of air required to produce the changed amount of oxygen can be deduced, that is, the change in the amount of air that the air compressor needs to inhale can also be calculated. The amount of air that the air compressor needs to inhale is related to the frequency of the air compressor, so the frequency change caused by the change in the amount of air that needs to be inhaled can also be calculated. Through the above analysis, the corresponding relationship between the change in the frequency of the combined air conditioner fan and the change in the frequency of the oxygen production module air compressor under a certain fixed indoor oxygen concentration can be established, and the corresponding relationship is written into the algorithm and built into the controller.

[0159] That is, the corresponding relationship between the change in the frequency of the fan and the change in the frequency of the air compressor of the oxygen production module is preset and saved.

[0160] The control logic is based on the fact that the oxygen concentration required in the user's room is relatively fixed, that is, the oxygen concentration can be used to calculate the amount of oxygen that needs to be mixed in to meet the oxygen concentration under a certain air supply volume of the combined air conditioner, that is, the required oxygen production. The oxygen production is related to the amount of air inhaled by the air compressor. By adjusting the frequency of the air compressor to change the amount of air inhaled, the oxygen production of the oxygen production module can be changed. This control can maintain the relative stability of the oxygen concentration in the user's room without installing an oxygen concentration sensor indoors. Since oxygen concentration sensors are expensive, this solution can save costs.

[0161] When the indoor oxygen concentration changes due to factors such as the large-scale flow of people, but the air supply volume of the combined air conditioner does not change, it is impossible to obtain the corresponding oxygen production module frequency change according to the fan frequency change, and then control the oxygen production module. At this time, it is necessary to introduce an oxygen concentration detection device to detect the indoor oxygen concentration and compare it with the set indoor concentration range.

[0162] In some other embodiments of the present application, the control module is further configured to perform the following steps: Fig.16 shown.

[0163] Step S91: Obtain indoor oxygen concentration.

[0164] Step S92: Control the frequency of the oxygen production module according to the relationship between the indoor oxygen concentration and the set indoor concentration range.

[0165] When the indoor oxygen concentration is lower than the lower limit of the set indoor concentration range, the frequency of controlling the oxygen production module is increased to increase the oxygen production amount, thereby increasing the outlet oxygen concentration.

[0166] When the indoor oxygen concentration is higher than the upper limit of the set indoor concentration range, the frequency of controlling the oxygen production module is reduced to reduce the oxygen production amount, thereby reducing the outlet oxygen concentration.

[0167] When the indoor oxygen concentration is within the set indoor concentration range, the oxygen production module is controlled to maintain the current frequency to maintain the current oxygen production volume and the current outlet oxygen concentration.

[0168] By designing steps S91 to S92, the frequency of the oxygen production module is changed according to the indoor oxygen concentration, thereby changing the oxygen production amount and the indoor oxygen concentration, and the control is simple and convenient.

[0169] For example, see Fig.17As shown, the oxygen production of the oxygen production module is adjusted according to the oxygen concentration detection value and the set value. That is, when the oxygen concentration detection value is lower than the lower limit of the specified value, the frequency of the air compressor of the oxygen production module increases, and more air is inhaled to increase the oxygen production. When the oxygen concentration detection value is higher than the upper limit of the specified value, the frequency of the air compressor of the oxygen production module decreases, reducing the amount of air inhaled and thus reducing the oxygen production. When the oxygen concentration detection value is within the specified value range, the air compressor of the oxygen production module maintains the current frequency and the amount of air inhaled remains unchanged.

[0170] ηO2 is the oxygen concentration detection value; ηO2(specified) is the oxygen concentration specified value;

[0171] δO2 is the oxygen set value deviation; H: oxygen generator air compressor frequency.

[0172] ηO2(specified)-δO2 is the lower limit of the specified value;

[0173] ηO2(specified)+δO2 is the upper limit of the specified value.

[0174] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0175] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A combined air conditioning unit, characterized in that: include: An oxygen production module, which is used to produce oxygen; The mixing section has an oxygen inlet and a fresh air inlet and / or a return air inlet; the oxygen generated by the oxygen production module enters the mixing section through the oxygen inlet; A surface cooling section, which is connected to the mixing section; An air supply section, which is in communication with the surface cooling section and has an air supply port for supplying air to the room; The control module is configured to: obtain a change in the air supply volume of the air supply port; obtain a change in the oxygen production volume corresponding to the change in the air supply volume; and control the operation of the oxygen production module according to the change in the oxygen production volume.

2. The combined air conditioner according to claim 1, characterized in that: The control module is further configured to: The corresponding relationship between the change in the air supply volume of the preset air supply port and the change in the oxygen production volume of the oxygen production module; According to the change in the air supply volume of the air supply port, the corresponding relationship is queried to obtain the corresponding change in the oxygen production volume.

3. The combined air conditioner according to claim 1, characterized in that: A fan is provided in the air supply section; the frequency of the fan is positively correlated with the air supply volume of the air supply port; The control module is further configured to: obtain a frequency change of the fan; obtain a frequency change of the oxygen production module corresponding to the frequency change of the fan; and control the operation of the oxygen production module according to the frequency change of the oxygen production module.

4. The combined air conditioner according to claim 3, characterized in that: The control module is further configured to: The corresponding relationship between the frequency change of the preset fan and the frequency change of the oxygen production module; According to the frequency change of the fan, the corresponding relationship is queried to obtain the frequency change of the corresponding oxygen production module.

5. The combined air conditioner according to claim 1, characterized in that: The control module is further configured to: Obtaining the air supply volume of the air supply outlet; Obtaining the oxygen production capacity of the oxygen production module corresponding to the air supply capacity of the air supply port; The operation of the oxygen production module is controlled according to the oxygen production amount.

6. The combined air conditioner according to claim 5, characterized in that: The control module is further configured to: The correspondence between the air supply volume of the preset air supply port and the oxygen production volume of the oxygen production module; According to the air supply volume of the air supply port, the corresponding relationship is queried to obtain the corresponding oxygen production volume.

7. The combined air conditioner according to claim 1, characterized in that: A fan is provided in the air supply section; the frequency of the fan is positively correlated with the air supply volume of the air supply port; The control module is further configured to: obtain the frequency of the fan; obtain the frequency of the oxygen production module corresponding to the frequency of the fan; and control the operation of the oxygen production module according to the frequency of the oxygen production module.

8. The combined air conditioner according to claim 7, characterized in that: The control module is further configured to: The corresponding relationship between the preset fan frequency and the oxygen production module frequency; According to the frequency of the fan, the corresponding relationship is queried to obtain the frequency of the corresponding oxygen production module.

9. The combined air conditioner according to claim 1, characterized in that: The control module is further configured to: When the indoor oxygen concentration is lower than the lower limit of the set indoor concentration range, the frequency of controlling the oxygen production module is increased; When the indoor oxygen concentration is higher than the upper limit of the set indoor concentration range, the frequency of controlling the oxygen production module is reduced; When the indoor oxygen concentration is within the set indoor concentration range, the oxygen production module is controlled to maintain the current frequency.

10. The combined air conditioner according to any one of claims 1 to 9, characterized in that: The oxygen production module is independently arranged, and the oxygen produced by the module is transported to the mixing section via a gas transmission pipe.

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