Air handling device

Abstract

An air treatment device includes an oxygen generating device (20), a first section (11), a second section (17), and a controller (600). The oxygen generating device (20) is configured to generate oxygen. The first section (11) includes a first inlet (113) and at least one of a second inlet (111) or a third inlet (112). The oxygen generated by the oxygen generating device (20) enters the first section (11) through the first inlet (113). The second inlet (111) is connected to the outside, and air from the outside enters the first section (11) through the second inlet (111). The third inlet (112) is connected to the inside, and air from the inside enters the first section (11) through the third inlet (112). The second section (17) is connected to the first section (11). The second section (17) includes an air supply outlet (171) configured to supply air to the inside. The controller (600) is coupled to the oxygen generating device (20), and the controller (600) is configured to calculate an oxygen generation amount of the oxygen generating device (20) according to a demand space oxygen influencing factor, and control operation of the oxygen generating device (20) according to the calculated oxygen generation amount.

Description

Air handling equipment

[0001] This application claims priority to Chinese patent application No. 202311430230.7 filed on October 31, 2023, priority to Chinese patent application No. 202311442552.3 filed on October 31, 2023, priority to Chinese patent application No. 202410123337.5 filed on January 29, 2024, and priority to Chinese patent application No. 202410203508.5 filed on February 23, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to the technical field of air conditioning, and in particular to an air treatment device. Background Art

[0003] A modular air handling unit is an air handling device composed of various air handling functional sections. Typically, a modular air handling unit includes a mixing section, a filtration section, a surface cooling section, a hot water or steam coil section, a humidification section, a spray section, a heat recovery section, a fan section, a flow equalization section, and a muffler section.

[0004] The modular air-conditioning unit is a complete air treatment product that can meet the needs of various occasions such as general air conditioning, industrial plants, exhibition halls, medical purification, etc.

[0005] Summary of the Invention

[0006] On the one hand, an air treatment device is provided, comprising an oxygen generator, a first section, a second section, and a controller. The oxygen generator is configured to generate oxygen. The first section includes a first inlet and at least one of a second inlet or a third inlet. The oxygen generated by the oxygen generator enters the first section through the first inlet. The second inlet is connected to the outside of the room, and the outdoor air enters the first section through the second inlet. The third inlet is connected to the room, and the indoor air enters the first section through the third inlet. The second section is connected to the first section. The second section includes an air supply port, and the air supply port is configured to supply air into the room. The control is coupled to the oxygen generator, and the controller is configured to: calculate the oxygen production capacity of the oxygen generator based on the factors affecting the oxygen demand in the space; and control the operation of the oxygen generator based on the calculated oxygen production capacity.

[0007] On the other hand, an air treatment device is provided, comprising a second section, a fan, and a controller. The fan is disposed within the second section. The controller is configured to: activate a static pressure identification function, obtain a speed corresponding to a first set static pressure value as a target speed, and obtain a power value corresponding to the first set static pressure value as a target power value; wherein the first set static pressure value is a middle static pressure value within a static pressure value range of the air treatment device; control the fan to operate at the target speed, and obtain a current power value of the fan; if it is determined that the absolute value of the difference between the current power value of the fan and the target power value does not meet a preset condition, adjust the set speed based on the target speed, use the adjusted set speed as a new target speed, and obtain a target power value corresponding to the new target speed; adjust the speed of the fan, control the fan to operate at the new target speed, and re-obtain the current power value of the fan; if it is determined that the absolute value of the difference between the current power value of the fan and the target power value meets the preset condition, static pressure identification is completed, and the static pressure value corresponding to the target power value is used as the static pressure value of the air treatment device.

[0008] In yet another aspect, an air handling device is provided, comprising an outdoor unit, an indoor unit, a first sensor, a first setting component, and a controller. The outdoor unit comprises a compressor and a first heat exchanger. The indoor unit is connected to the outdoor unit and comprises a second heat exchanger, a first regulating device, a third heat exchanger, and a second regulating device. The second heat exchanger is configured to dehumidify the air flowing therethrough. The first regulating device is configured to throttle the refrigerant entering the second heat exchanger. The third heat exchanger is configured to heat the dehumidified air. The second regulating device is configured to throttle the refrigerant flowing out of the third heat exchanger. When the air handling device operates in a reheat dehumidification mode, the compressor, the third heat exchanger, the second regulating device, the first regulating device, and the second heat exchanger are sequentially connected via a refrigerant pipeline; the compressor, the first heat exchanger, the first regulating device, and the second heat exchanger are sequentially connected via a refrigerant pipeline. The first sensor is configured to detect the indoor temperature. The first setting component is configured to set a target set temperature. The controller is configured to: determine a first target frequency value of the compressor based on the indoor temperature and the target set temperature; determine a liquid pipe temperature value between the third heat exchanger and the second regulating device based on the first target frequency value; and adjust the opening of the second regulating device based on the liquid pipe temperature value and the target subcooling degree of the third heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG1A is a structural diagram of an air conditioner according to some embodiments;

[0010] FIG1B is a block diagram of an air conditioner according to some embodiments;

[0011] FIG1C is a structural diagram of a combined air conditioner according to some embodiments;

[0012] FIG2 is a structural diagram of another combined air conditioner according to some embodiments;

[0013] FIG3 is a structural diagram of another combined air conditioner according to some embodiments;

[0014] FIG4 is a block diagram of a first segment according to some embodiments;

[0015] FIG5 is a schematic diagram of an oxygen production principle of an oxygen production device according to some embodiments;

[0016] FIG6 is a structural diagram of an oxygen production device according to some embodiments;

[0017] FIG7 is a flow chart of a method for controlling a combined air conditioner according to some embodiments;

[0018] FIG8 is another flow chart of a method for controlling a combined air conditioner according to some embodiments;

[0019] FIG9 is another flow chart of a method for controlling a combined air conditioner according to some embodiments;

[0020] FIG10 is another flow chart of a method for controlling a combined air conditioner according to some embodiments;

[0021] FIG11 is another flow chart of a method for controlling a combined air conditioner according to some embodiments;

[0022] FIG12 is a flowchart of another method for controlling a combined air conditioner according to some embodiments;

[0023] FIG13 is another flow chart of a method for controlling a combined air conditioner according to some embodiments;

[0024] FIG14 is another flow chart of a method for controlling a combined air conditioner according to some embodiments;

[0025] FIG15A is a block diagram of a controller of a combined air conditioner according to some embodiments;

[0026] FIG15B is a flow chart illustrating feedback control of fan frequency to an oxygen generator according to some embodiments;

[0027] FIG16 is another flow chart of a method for controlling a combined air conditioner according to some embodiments;

[0028] FIG17 is another flow chart of a method for controlling a combined air conditioner according to some embodiments;

[0029] FIG18 is a diagram of a refrigerant circulation system of a combined air conditioner according to some embodiments;

[0030] FIG19 is a refrigerant flow diagram of a combined air conditioner in a dehumidification and reheating mode according to some embodiments;

[0031] FIG20 is a refrigerant flow diagram of a combined air conditioner in a heating mode according to some embodiments;

[0032] FIG21A is a block diagram of another air conditioner according to some embodiments;

[0033] FIG21B is a graph showing a correspondence between a compressor temperature demand frequency range and a liquid pipe temperature value according to some embodiments;

[0034] FIG22 is a flow chart of a method for controlling a third heat exchanger in a reheat dehumidification mode of an air conditioner according to some embodiments;

[0035] FIG23 is a flow chart of a method for controlling an air conditioner in a reheat dehumidification mode according to some embodiments;

[0036] FIG24 is another flow chart of a method for controlling an air conditioner in a reheat dehumidification mode according to some embodiments;

[0037] FIG25 is another refrigerant circulation system diagram of an air conditioner according to some embodiments;

[0038] FIG26 is a flow chart of a method for controlling an air conditioner in a heating mode according to some embodiments;

[0039] FIG27 is a diagram of an air conditioner and a host computer according to some embodiments;

[0040] FIG28 is a flow chart of a method for a host computer to control an air conditioner according to some embodiments;

[0041] FIG29 is a structural diagram of yet another combined air conditioner according to some embodiments;

[0042] FIG30 is a trend diagram of an iso-air volume curve, an iso-static pressure curve, and an iso-channel curve according to some embodiments;

[0043] FIG31 is another flow chart of a method for controlling a combined air conditioner according to some embodiments;

[0044] FIG32 is another flow chart of a method for controlling a combined air conditioner according to some embodiments;

[0045] FIG33 is another flow chart of a method for controlling a combined air conditioner according to some embodiments;

[0046] FIG34 is another flow chart of a method for controlling a combined air conditioner according to some embodiments;

[0047] FIG35 is another flow chart of a method for controlling a combined air conditioner according to some embodiments;

[0048] FIG36 is another flow chart of a method for controlling a combined air conditioner according to some embodiments;

[0049] FIG37 is another flow chart of a method for controlling a combined air conditioner according to some embodiments;

[0050] FIG38 is another flow chart of a method for controlling a combined air conditioner according to some embodiments. DETAILED DESCRIPTION

[0051] The following will be combined with the accompanying drawings to clearly and completely describe some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0052] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0053] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0054] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. The term "connected" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. The term "coupled" indicates that two or more components are in direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0055] “At least one of A, B and C” has the same meaning as “at least one of A, B or C” and both include the following combinations of A, B and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B and C.

[0056] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0057] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0058] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0059] As used herein, "equal" includes the stated conditions and conditions that are similar to the stated conditions, where the range of the similar conditions is within an acceptable range of deviation, where the acceptable range of deviation is determined by one of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system). For example, "equal" includes absolute equality and approximate equality, where the acceptable range of deviation for approximate equality can be, for example, that the difference between the two is less than or equal to 5% of either.

[0060] Some embodiments of the present disclosure provide an air handling device. The air handling device can adjust air temperature, humidity, oxygen content, etc. For example, the air handling device is an air conditioner, a fresh air blower, a ducted air conditioner, a combined air conditioner, etc.

[0061] The operation process of the air handling device is described below by taking an air conditioner 1000 as an example. As shown in FIG1A and FIG1B , the air conditioner 1000 includes an outdoor unit 1 .

[0062] In some embodiments, the air conditioner 1000 further includes an indoor unit 2. The indoor unit 2 is connected to the outdoor unit 1.

[0063] In some embodiments, the air conditioner 1000 further includes a pipeline 30. The indoor unit 2 and the outdoor unit 1 are connected via the pipeline 30 to transmit refrigerant.

[0064] In some embodiments, the outdoor unit 1 includes a compressor 101. The compressor 101 is configured to compress refrigerant so that low-pressure refrigerant is compressed to form high-pressure refrigerant.

[0065] In some embodiments, the outdoor unit 1 further includes a first heat exchanger 103 (outdoor heat exchanger). The first heat exchanger 103 is configured to perform heat exchange between outdoor air and the refrigerant transmitted in the first heat exchanger 103. For example, the first heat exchanger 103 operates as a condenser in the cooling mode of the air conditioner 1000, so that the refrigerant compressed by the compressor 101 dissipates heat to the outdoor air through the first heat exchanger 103 and condenses. The first heat exchanger 103 operates as an evaporator in the heating mode of the air conditioner 1000, so that the decompressed refrigerant absorbs heat from the outdoor air through the first heat exchanger 103 and evaporates.

[0066] In some embodiments, the first heat exchanger 103 further includes heat exchange fins to expand the contact area between the outdoor air and the refrigerant transmitted in the first heat exchanger 103, thereby improving the heat exchange efficiency between the outdoor air and the refrigerant.

[0067] In some embodiments, the outdoor unit 1 further includes a first fan 104 (outdoor fan). The first fan 104 is configured to draw outdoor air into the outdoor unit 1 through the outdoor air inlet of the outdoor unit 1 and to deliver the outdoor air, after heat exchange with the first heat exchanger 103, through the outdoor air outlet of the outdoor unit 1. The first fan 104 provides power for the flow of outdoor air.

[0068] In some embodiments, the indoor unit 2 includes an indoor heat exchanger 200 (indoor heat exchanger). The indoor heat exchanger 200 is configured to exchange heat between indoor air and the refrigerant transmitted through the indoor heat exchanger 200. For example, in the cooling mode of the air conditioner 1000, the indoor heat exchanger 200 operates as an evaporator, so that the refrigerant, after dissipating heat through the first heat exchanger 103, absorbs heat from the indoor air through the indoor heat exchanger 200 and evaporates. In the heating mode of the air conditioner 1000, the indoor heat exchanger 200 operates as a condenser, so that the refrigerant, after absorbing heat through the first heat exchanger 103, dissipates heat to the indoor air through the indoor heat exchanger 200 and condenses.

[0069] In some embodiments, the indoor heat exchanger 200 further includes heat exchange fins to expand the contact area between the indoor air and the refrigerant transmitted in the indoor heat exchanger 200, thereby improving the heat exchange efficiency between the indoor air and the refrigerant.

[0070] As shown in Figures 1A and 1B , the indoor unit 2 further includes a second fan 205 (indoor fan). The second fan 205 is configured to draw indoor air into the indoor unit 2 through the indoor air inlet of the indoor unit 2 and to deliver the indoor air, after heat exchange with the indoor heat exchanger 200, through the air outlet of the indoor unit 2. The second fan 205 provides power for the flow of indoor air.

[0071] In some embodiments, the compressor 101, the first heat exchanger 103, the expansion valve 105 and the indoor heat exchanger 200 connected in sequence form a refrigerant circuit, in which the refrigerant circulates and exchanges heat with the air through the first heat exchanger 103 and the indoor heat exchanger 200 respectively, so as to realize the cooling mode or heating mode of the air conditioner 1000.

[0072] In some embodiments, the outdoor unit 1 further includes an expansion valve 105. The expansion valve 105 is connected between the first heat exchanger 103 and the indoor heat exchanger 200. The opening of the expansion valve 105 regulates the pressure of the refrigerant flowing through the first heat exchanger 103 and the indoor heat exchanger 200, thereby adjusting the refrigerant flow rate between the first heat exchanger 103 and the indoor heat exchanger 200. The flow rate and pressure of the refrigerant flowing between the first heat exchanger 103 and the indoor heat exchanger 200 will affect the heat exchange performance of the first heat exchanger 103 and the indoor heat exchanger 200. The expansion valve 105 may be an electronic valve. The opening of the expansion valve 105 is adjustable to control the flow rate and pressure of the refrigerant flowing through the expansion valve 105.

[0073] In some embodiments, the outdoor unit 1 further includes a four-way valve 102. The four-way valve 102 is connected to the refrigerant circuit and is configured to switch the flow direction of the refrigerant in the refrigerant circuit so that the air conditioner 1000 operates in cooling mode or heating mode.

[0074] It is understood that in cooling mode, the indoor heat exchanger acts as an evaporator and the outdoor heat exchanger acts as a condenser. In heating mode, the indoor heat exchanger acts as a condenser and the outdoor heat exchanger acts as an evaporator.

[0075] Current methods for increasing indoor oxygen concentrations include using fresh air conditioning. This method works similarly to window ventilation, primarily by exchanging indoor and outdoor air, bringing indoor oxygen concentrations close to atmospheric oxygen levels (20.9%). However, this method cannot reach the more comfortable forest oxygen levels (approximately 21.5%).

[0076] Patent document CN1584425A describes a modular air conditioner equipped with an oxygen generator. The oxygen generator utilizes pressure swing adsorption (PSA), vacuum swing adsorption (VSA), and vacuum pressure swing adsorption (VPSA) oxygen generators, as well as membrane separation air oxygen generators, to produce oxygen. The modular air conditioner processes air to a suitable temperature and humidity, then mixes it with oxygen produced by the oxygen generator and delivers it to the air-conditioned room. Furthermore, an oxygen concentration detector is installed in the room to measure the oxygen concentration in the indoor air. If the indoor oxygen concentration is below a specified value, the oxygen generator is activated. Once the indoor oxygen concentration exceeds a preset value, the oxygen generator is shut down or operated at low load. However, this air conditioning system requires the output airflow from the modular air conditioner to be remixed with the oxygen produced by the oxygen generator, which increases the length of the piping. Furthermore, controlling the start and stop of the oxygen generator based on the indoor oxygen concentration does not allow for precise control of its operation.

[0077] To address the aforementioned issues, some embodiments of the present disclosure provide an air treatment device (e.g., a modular air conditioner) comprising a mixing section that can communicate with indoor air through an opening. Oxygen generated by an oxygen generator enters the mixing section, mixes with the indoor air in the mixing section, and is then delivered into the room. This increases the oxygen concentration in the indoor air without requiring further mixing with the airflow output by the modular air conditioner, thus shortening the length of the piping.

[0078] Furthermore, the modular air conditioners of some embodiments of the present disclosure adjust the oxygen production of the oxygen generator based on one or more of the following factors: the modular air conditioner's air volume, the change in air volume, the fan frequency, and the change in fan frequency. This maintains the indoor oxygen concentration within a preset range, reduces the likelihood of the indoor oxygen concentration falling outside the preset range, and improves the accuracy of the control of the oxygen production of the oxygen generator. Furthermore, the modular air conditioners of some embodiments of the present disclosure do not require an oxygen concentration sensor, reducing production costs for the modular air conditioners.

[0079] In some embodiments, referring to Figures 1C to 3 and Figure 21A, some embodiments of the present disclosure provide a modular air conditioner, comprising an oxygen generator 20 configured to generate oxygen. The oxygen generator 20 is disposed within the modular air conditioner and located at the front end of the modular air conditioner along the direction of airflow. For example, the oxygen generator 20 is an oxygen generator or a component or device outside the oxygen generator that is capable of generating oxygen.

[0080] In some embodiments, the combined air conditioner further includes a first section 11 (mixing section), the first section 11 includes a first inlet 113 (oxygen inlet), the first inlet 113 is connected to the oxygen generator 20, and the oxygen generated by the oxygen generator 20 enters the first section 11 through the first inlet 113.

[0081] In some embodiments, the first section 11 further includes at least one of a second inlet 111 (fresh air inlet) or a third inlet 112 (return air inlet). The second inlet 111 connects to the outside, allowing outdoor air (i.e., fresh air) to enter the first section 11 through the second inlet 111. The third inlet 112 connects to the inside, allowing indoor air (i.e., return air) to enter the first section 11 through the third inlet 112. Thus, the first section 11 is configured to mix the oxygen output by the oxygen generator 20 with at least one of the fresh air or return air.

[0082] In some embodiments, the combined air conditioner further includes a fourth section 13 (surface cooling section), which is connected to the first section 11. The fourth section 13 is configured to cool or heat the airflow passing through it. The surface cooling section is configured to cool the fresh air and return air of the purification air conditioning system.

[0083] In some embodiments, the combined air conditioner further includes a second section 17 (air supply section), which is connected to the fourth section 13. The second section 17 includes an air supply port 171, which is configured to supply air to the room.

[0084] In some embodiments, the combined air conditioner further includes a fan 172, which is disposed in the second section 17. The fan 172 rotates to drive air flow through the air outlet 171 and blow it into the room.

[0085] In some embodiments, the combined air conditioner further includes a third section 12 (filtering section), which is disposed between the first section 11 and the fourth section 13 and configured to filter airflow.

[0086] In some embodiments, the combined air conditioner further includes a fifth section 14 (humidifying section), which is disposed between the fourth section 13 and the second section 17. The fifth section 14 is configured to humidify the airflow.

[0087] In some embodiments, the combined air conditioner further includes a sixth section 15 (noise-reducing section), which is disposed between the fourth section 13 and the second section 17. The sixth section 15 is configured to eliminate noise.

[0088] In some embodiments, the combined air conditioner further includes a seventh section 16 (maintenance section), which is disposed between the fourth section 13 and the second section 17. Maintenance personnel can perform maintenance on the combined air conditioner through the seventh section 16.

[0089] In some embodiments, the first section 11, the third section 12, the fourth section 13, the fifth section 14, the sixth section 15, the seventh section 16, and the second section 17 are sequentially arranged along the airflow direction. Each functional section performs corresponding functional processing on the air.

[0090] During operation of the combined air conditioner, the high-concentration oxygen produced by the oxygen generator 20 enters the first section 11 and mixes with at least one of the fresh air or the return air. The mixed gas is filtered by the third section 12, cooled or heated by the fourth section 13, humidified by the fifth section 14, and silenced by the sixth section 15. It then enters the second section 17 through the seventh section 16 and is then delivered into the room by the fan 172.

[0091] It should be noted that the oxygen produced by the oxygen generator 20 may contain gases other than oxygen, such as water vapor. If the oxygen generator 20 is placed at the rear end of the modular air conditioner along the airflow direction, the water vapor and other gases mixed in the high-concentration oxygen may not be effectively treated. Therefore, in some embodiments of the present disclosure, the oxygen generator 20 is placed in the front. In this way, the oxygen produced by the oxygen generator 20 can be centrally processed together with the air entering the modular air conditioner through the various functional sections described above. The oxygen produced by the oxygen generator 20 can also be fully mixed with the air entering the modular air conditioner, thereby improving the oxygen release effect.

[0092] The combined air conditioner shown in FIG1C is a mixed air unit, and the first section 11 includes a second inlet 111 , a third inlet 112 and a first inlet 113 .

[0093] The combined air conditioner shown in FIG2 is a fresh air unit, and the first section 11 includes a second inlet 111 and a first inlet 113 , but does not include a third inlet.

[0094] The combined air conditioner shown in FIG3 is a full return air unit, and the first section 11 includes the third inlet 112 and the first inlet 113 , but does not include the second inlet.

[0095] It should be noted that if the oxygen generated by the oxygen generator 20 does not enter the first section 11 through the first inlet 113, even a fresh air unit can only achieve an oxygen concentration in the air supply close to or reaching the atmospheric oxygen concentration (20.9%), and cannot reach the forest oxygen concentration (21.5%). Without the oxygen generator 20 and the first inlet 113, the oxygen concentration of the air supply of the mixed air unit and the full return air unit may be even lower. Therefore, regardless of the 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 generator 20.

[0096] Since the internal space of the modular air conditioning unit may not match the size of the oxygen generator 20, it is inconvenient to install the oxygen generator 20 inside the air conditioning unit. Moreover, if the oxygen generator 20 is installed inside the air conditioning unit, since the oxygen generator 20 needs to inhale air when producing oxygen, it may affect the air intake and air delivery of the modular air conditioning fan.

[0097] Therefore, in some embodiments, the oxygen generator 20 is independently installed, that is, it is mounted outside the modular air conditioning unit. The modular air conditioning unit also includes an air delivery pipe 26 connecting the oxygen generator 20 and the first section 11. The oxygen generated by the oxygen generator 20 is delivered to the first section 11 via the air delivery pipe 26. Referring to Figure 4 , the air delivery pipe 26 can pass through the first inlet 113 and enter the first section 11.

[0098] Thus, an air delivery pipe 26 is installed within the modular air conditioning unit. The high-concentration oxygen produced by the oxygen generator 20 is delivered to the modular air conditioning unit interior (i.e., first section 11) via the air delivery pipe 26. The oxygen is then mixed with at least one of the fresh air or the return air, and then filtered, cooled, humidified, and other processes before being delivered to the room. This allows the oxygen generator 20 to accommodate modular air conditioning units of varying sizes, facilitating installation and maintenance, and increasing the practicality and environmental adaptability of the modular air conditioning unit.

[0099] In some embodiments, the oxygen generator 20 uses a pressure swing adsorption (PSA) process to produce oxygen. Specifically, air is compressed into an adsorption tower equipped with a molecular sieve, which selectively adsorbs impurities such as nitrogen, carbon dioxide, and water from the air, thereby producing oxygen with a purity of over 90%.

[0100] In some embodiments, referring to FIG. 5 and FIG. 6 , the oxygen generating device 20 includes an air purification device 21 configured to purify air.

[0101] In some embodiments, the oxygen generating apparatus 20 further includes a muffler 22 configured to muffle noise.

[0102] In some embodiments, the oxygen generator 20 further includes an air compressor 23 configured to compress air. For example, the air compressor 23 is an oil-free air compressor. In some embodiments of the present disclosure, the frequency of the oxygen generator 20 is the same as the frequency of the air compressor 23. The higher the frequency of the air compressor 23, the greater the oxygen production capacity of the oxygen generator 20.

[0103] In some embodiments, the oxygen production device 20 further includes a molecular sieve adsorption tower 24, which includes an air inlet configured to receive air compressed by the air compressor 23. The molecular sieve adsorption tower 24 also includes an oxygen outlet configured to discharge oxygen. The molecular sieve adsorption tower 24 also includes a nitrogen outlet configured to discharge nitrogen.

[0104] In some embodiments, the oxygen generator 20 further includes a gas collecting tank 25. The gas inlet of the gas collecting tank 25 is connected to the oxygen outlet of the molecular sieve adsorption tower 24. The gas outlet of the gas collecting tank 25 is connected to a gas delivery pipe 26. The gas delivery pipe 26 is connected to the first inlet 113 of the first section 11. The gas collecting tank 25 is configured to collect oxygen discharged from the molecular sieve adsorption tower 24.

[0105] During the operation of the oxygen generator 20, the outside air first passes through the air purification device 21 to filter out impurities such as dust, thereby ensuring the operational reliability of the air compressor 23. The filtered air then passes through the muffler 22 for noise reduction before entering the air compressor 23. The air compressor 23 compresses the air and outputs the compressed air to the molecular sieve adsorption tower 24. The molecular sieve adsorption tower 24 compresses the air into high-pressure gas to increase its adsorption efficiency. After passing through the molecular sieve adsorption tower 24, the vast majority of the nitrogen in the air is discharged from the oxygen generator 20 through the exhaust valve 27. The remaining high-concentration oxygen is then output through the gas collecting tank 25 for pressure stabilization and supply to the indoor environment.

[0106] In some embodiments, the combined air conditioner further includes an oxygen component, which is configured to calculate the oxygen production capacity of the oxygen generator 20 according to the oxygen demand influencing factors of the space.

[0107] For example, factors influencing space oxygen demand include space oxygen increase, personnel consumption, and space oxygen leakage. The oxygen component is configured to calculate the oxygen production amount based on at least space oxygen increase, personnel consumption, and space oxygen leakage.

[0108] It's understandable that to achieve the required oxygen concentration, a modular air conditioner needs to calculate the oxygen production capacity based on the amount of oxygen added to the room, the oxygen consumption of personnel, and the amount of oxygen leakage in the room. Specifically, oxygen production capacity = room oxygen addition + personnel oxygen consumption + room oxygen leakage.

[0109] It should be noted that after the oxygen production capacity is calculated, it is also necessary to determine the oxygen concentration in the air flow delivered to the room by the combined air conditioner.

[0110] The oxygen concentration in the airflow delivered by the modular air conditioner into the room is also related to the airflow rate of the air conditioner. Therefore, the oxygen production capacity calculated using the above formula only corresponds to the required oxygen production capacity at a specific oxygen concentration and airflow rate. To ensure the accuracy of the indoor oxygen concentration, the oxygen production capacity of the oxygen generator 20 should also change accordingly when the airflow rate of the air conditioner changes.

[0111] In some embodiments, the combined air conditioner further comprises a controller 600 , which is configured to control the operation of the entire combined air conditioner. The oxygen component can be integrated into the controller 600 .

[0112] The controller 600 may be a chip or a processor. For example, the processor may be a general-purpose central processing unit (CPU), a microprocessor, or an application-specific integrated circuit (ASIC). Alternatively, the controller 600 may be a programmable device, including a complex programmable logic device (CPLD), an erasable programmable logic device (EPLD), or a field programmable gate array (FPGA). The chip may be an integrated circuit (IC).

[0113] In some embodiments, the controller 600 is further configured to: obtain a change in the air supply volume of the air supply port 171 of the second section 17; 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 device 20 according to the change in the oxygen production volume.

[0114] It is understood that there is a mapping relationship between the change in the air supply volume of the air supply port 171 and the change in the oxygen production volume. When the air supply volume changes, the oxygen production volume of the oxygen production device 20 also needs to change accordingly to ensure that the oxygen concentration of the air outlet remains unchanged.

[0115] The combined air conditioner provided in some embodiments of the present disclosure controls the operation of the oxygen generator 20 according to the change in oxygen production amount by obtaining the change in air supply volume at the air supply outlet 171 of the second section 17 and the change in oxygen production volume corresponding to the change in air supply volume, so that the oxygen generator 20 can achieve the corresponding change in oxygen production volume, thereby making the oxygen concentration at the air supply outlet 171 within the set concentration range, and ultimately keeping the indoor oxygen concentration within the set concentration range.

[0116] The combined air conditioner of some embodiments of the present disclosure controls the operation of the oxygen generator 20 according to the change in oxygen production, thereby improving the accuracy of control over the oxygen generator 20 and solving the technical problem in related arts of being unable to accurately control the oxygen generator.

[0117] Some embodiments of the modular air conditioner disclosed herein feature an oxygen-generating function. The first section 11 receives oxygen from the oxygen generator 20 and can be referred to as the "oxygen-enrichment section." By adding this functional section, the oxygen concentration in the air delivered by the modular air conditioner is increased, thereby increasing the oxygen concentration in the room being supplied. The oxygen-enrichment section, as a functional section of the modular air conditioner, is combined with other functional sections to form a complete unit.

[0118] The combined air conditioner of some embodiments of the present disclosure does not require changing the main structure of the combined air conditioner and will not affect other components in the air conditioner.

[0119] In some embodiments of the modular air conditioner disclosed herein, oxygen generated by the oxygen generator 20 is mixed with air within the modular air conditioner before being delivered to the room. The oxygen generator 20 is integrated into the modular air conditioner as a functional segment, which does not interfere with the air supply piping and does not increase the length of the piping. Furthermore, some embodiments of the modular air conditioner disclosed herein can control oxygen concentration without installing an oxygen concentration sensor in the room, thereby improving and maintaining the stability of oxygen concentration in the user's room.

[0120] The high-concentration oxygen (about 90%) output by the oxygen generator 20 can be mixed with the air in the modular air conditioner to increase the oxygen concentration of the airflow output by the modular air conditioner, thereby increasing the oxygen concentration in the room.

[0121] In some embodiments, the controller 600 is further configured to obtain a correspondence between a preset air supply volume change of the air supply port 171 and a preset oxygen production volume change of the oxygen generator 20. The corresponding oxygen production volume change is obtained based on the air supply volume change of the air supply port 171 and the correspondence.

[0122] It can be understood that by presetting the correspondence between the change in the air supply volume of the air supply port 171 and the change in the oxygen production volume of the oxygen generator 20, and then querying the correspondence to obtain the corresponding change in the oxygen production volume, the accuracy and convenience of controlling the oxygen generator 20 can be improved.

[0123] In some embodiments, the modular air conditioner further includes a fan 172 disposed within the second section 17. The frequency of the fan 172 is positively correlated with the air volume supplied by the air outlet 171. The higher the frequency of the fan 172, the greater the air volume supplied. Therefore, when the frequency of the fan 172 changes, the air volume supplied also needs to change.

[0124] It is understandable that by adjusting the fan frequency, the air supply volume can be adjusted.

[0125] In some embodiments, the controller 600 is further configured to: obtain a frequency change of the fan 172, obtain a frequency change of the oxygen generator 20 corresponding to the frequency change of the fan 172, and control the operation of the oxygen generator 20 according to the frequency change of the oxygen generator 20.

[0126] It is understood that the frequency of the oxygen generator 20 is positively correlated with the oxygen production capacity. The higher the frequency of the oxygen generator 20, the greater the oxygen production capacity. When the frequency of the oxygen generator 20 changes, the oxygen production capacity also changes. By adjusting the frequency of the oxygen generator 20, the oxygen production capacity of the oxygen generator 20 can be adjusted.

[0127] In addition, there is a mapping relationship between the frequency change of the fan 172 and the frequency change of the oxygen generator 20. When the frequency of the fan 2 changes, the frequency of the oxygen generator 20 also needs to change accordingly to ensure that the oxygen concentration in the output airflow remains unchanged.

[0128] In some embodiments, the controller 600 is further configured to: obtain a frequency change of the fan 172, obtain a frequency change of the oxygen generator 20 corresponding to the frequency change of the fan 172, and control the operation of the oxygen generator 20 according to the frequency change of the oxygen generator 20.

[0129] It will be appreciated that the frequency variation of fan 172 is calculated by collecting the frequency of fan 172. The frequency of oxygen concentrator 20 is adjusted based on the frequency variation of fan 172, so that the frequency of oxygen concentrator 20 reaches the corresponding frequency variation. In this way, the frequency variation of oxygen concentrator 20 corresponds to the frequency variation of fan 172, ensuring that the oxygen concentration at air outlet 171 is within a set concentration range. This simplifies the frequency control process of oxygen concentrator 20 and improves the accuracy and convenience of control of oxygen concentrator 20.

[0130] In some embodiments, the controller 600 is further configured to obtain a predetermined correspondence between the frequency variation of the fan 172 and the frequency variation of the oxygen generator 20. The correspondence is queried based on the frequency variation of the fan 172 to obtain the corresponding frequency variation of the oxygen generator 20.

[0131] It can be understood that by presetting the correspondence between the frequency change of the fan 172 and the frequency change of the oxygen generator 20, and then querying the correspondence, the corresponding frequency change of the oxygen generator 20 is obtained, thereby controlling the operation of the oxygen generator 20, thereby improving the accuracy and convenience of controlling the oxygen generator 20.

[0132] In some embodiments, the controller 600 is further configured to obtain the air supply volume of the air supply port 171, obtain the oxygen production capacity of the oxygen generator 20 corresponding to the air supply volume of the air supply port 171, and control the operation of the oxygen generator 20 based on the obtained oxygen production capacity so that the oxygen generator 20 reaches the corresponding oxygen production capacity, thereby ensuring that the oxygen concentration at the air supply port 171 is within a set concentration range.

[0133] It can be understood that there is a mapping relationship between the air supply volume and the oxygen production volume. The operation of the oxygen production device 20 is controlled according to the oxygen production volume so that the oxygen production device 20 reaches the corresponding oxygen production volume, which can ensure that the oxygen concentration in the output air flow remains unchanged.

[0134] In some embodiments, the controller 600 is further configured to obtain a correspondence between the air volume of the preset air outlet and the oxygen production capacity of the oxygen generator, and query the correspondence according to the air volume of the air outlet 171 to obtain the corresponding oxygen production capacity.

[0135] It can be understood that by presetting the correspondence between the air supply volume of the air supply port 171 and the oxygen production volume of the oxygen production device 20, and then querying the correspondence to obtain the corresponding oxygen production volume, the operation of the oxygen production device 20 can be controlled, which is simple, convenient and accurate.

[0136] In some embodiments, the controller 600 is further configured to obtain the frequency of the fan 172, obtain the frequency of the oxygen concentrator 20 corresponding to the frequency of the fan 172, and control the operation of the oxygen concentrator 20 based on the obtained frequency of the oxygen concentrator 20 so that the oxygen concentrator 20 reaches the corresponding frequency.

[0137] It is understood that the frequency of fan 172 is positively correlated with the air volume supplied by air outlet 171, and the frequency of oxygen generator 20 is positively correlated with the oxygen production capacity. Furthermore, there is a mapping relationship between the frequency of fan 172 and the frequency of oxygen generator 20. Therefore, it can be inferred that there is also a mapping relationship between the air volume supplied and the oxygen production capacity.

[0138] It can be understood that by collecting the frequency of the fan 172 and adjusting the frequency of the oxygen generator 20 according to the frequency of the fan 172, the frequency control process of the oxygen generator 20 is simplified, and the frequency of the oxygen generator 20 can be made to correspond to the frequency of the fan 172, thereby making the air supply volume correspond to the oxygen production volume, and then the oxygen concentration at the air supply port 171 can be made within the set concentration range.

[0139] In some embodiments, the controller 600 is further configured to obtain a correspondence between a preset frequency of the fan 172 and a frequency of the oxygen generator 20 , and query the correspondence based on the frequency of the fan 172 to obtain the corresponding frequency of the oxygen generator 20 .

[0140] It can be understood that by presetting the correspondence between the frequency of the fan 172 and the frequency of the oxygen generator 20, and then querying the correspondence, the corresponding frequency of the oxygen generator 20 is obtained, thereby controlling the operation of the oxygen generator 20, which is simple, convenient and accurate.

[0141] 15A , the controller 600 includes a first sub-controller 601 (air conditioning controller) and a second sub-controller 602 (oxygen generator controller). The first sub-controller 601 and the second sub-controller 602 are communicably connected.

[0142] When selecting a modular air conditioner, a rated air supply volume is specified. Based on this rated air supply volume, the rated oxygen production capacity of the oxygen generator 20 can be calculated to meet the room's oxygen concentration at this rated air supply volume. That is, at the rated air supply volume of the air conditioner unit and the rated oxygen production capacity of the oxygen generator, the oxygen concentration in the air delivered to the room is fixed. However, the air supply volume of modular air conditioners is generally adjustable. Specifically, modular air conditioners equipped with a variable-frequency motor (fan) can adjust the air supply volume by adjusting the motor (fan) frequency. When the air supply volume changes, the oxygen production capacity needs to be adjusted accordingly to maintain the room's oxygen concentration. The oxygen production capacity of the oxygen generator is determined by the amount of air drawn in by the air compressor 23.

[0143] Therefore, based on the above conditions, the combined air conditioner of some embodiments of the present disclosure proposes a control concept for oxygen production, 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 second sub-controller 602. The second sub-controller 602 calculates the required oxygen production based on the received motor frequency value, and adjusts the operating frequency of the air compressor 23 to adjust the amount of air inhaled and thus change the oxygen production.

[0144] Referring to Figure 15B , the adjustment process includes: when the required air volume changes, the fan (variable frequency motor) in the modular air conditioner adjusts its frequency based on the required air volume to meet the required air volume. The modular air conditioner is equipped with a control cabinet, through which the first sub-controller 601 of the modular air conditioner and the second sub-controller 602 of the oxygen generator 20 are connected. The frequency change of the variable frequency motor is transmitted to the oxygen generator 20 through the control cabinet. After receiving this feedback, the oxygen generator 20 calculates the frequency change of the oxygen generator 20's air compressor 23 caused by the variable frequency motor frequency change using a built-in algorithm and adjusts the frequency of the air compressor 23 accordingly.

[0145] It should be noted that in some embodiments of the present disclosure, the control logic of the controller 600 is as follows: since changes in the motor frequency in the modular air conditioner affect the air supply volume of the modular air conditioner, the change in the required oxygen volume to ensure that the oxygen concentration in the air supply is a fixed value when the modular air conditioner's air supply volume changes is easily calculated. Since the oxygen concentration produced by the oxygen generator 20 is a fixed value, the change in the amount of air required to produce the changed amount of oxygen can be inferred, that is, the change in the amount of air required to be inhaled by the air compressor 23 can also be calculated. Since the amount of air required to be inhaled by the air compressor 23 is related to the frequency of the air compressor 23, the frequency change caused by the change in the required amount of inhaled air can also be calculated.

[0146] Through the above analysis, a correspondence between the frequency change of the combined air conditioner fan and the frequency change of the oxygen generator 20's air compressor 23 at a fixed indoor oxygen concentration can be established. This correspondence is then written into an algorithm and built into the controller 600. In other words, the correspondence between the change in fan frequency and the change in frequency of the oxygen generator's air compressor 23 is pre-set and stored.

[0147] This control logic is based on the assumption that the required oxygen concentration in a user's room is relatively fixed. This oxygen concentration can be used to calculate the amount of oxygen required to meet the desired oxygen concentration at a given airflow rate within the modular air conditioner. This oxygen production capacity, in turn, is related to the amount of air drawn in by air compressor 23. By adjusting the frequency of air compressor 23 to alter the amount of air drawn in, the oxygen production capacity of the oxygen generator can be varied. This control method maintains a relatively stable oxygen concentration in a user's room without requiring an oxygen concentration sensor. Given the high cost of oxygen concentration sensors, this solution can save costs.

[0148] Some embodiments of the present disclosure further provide a method for controlling an air conditioner 1000 . Referring to FIG. 7 , the method includes S11 to S13 .

[0149] S11, obtaining the change in the air supply volume of the air supply port 171 of the second section 17.

[0150] S12, obtaining the change in oxygen production amount corresponding to the change in air supply amount.

[0151] S13, controlling the operation of the oxygen production device 20 according to the change in oxygen production amount, so that the oxygen production device 20 can reach the corresponding oxygen production amount change amount, thereby making the oxygen concentration at the air supply port 171 within the set concentration range.

[0152] In some embodiments, referring to FIG. 8 , the method includes S21 to S22 .

[0153] S21 , obtaining a correspondence between a change in the air supply volume of the preset air supply port 171 and a change in the oxygen production volume of the oxygen production device 20 .

[0154] S22: Obtain the corresponding change in the oxygen production amount of the oxygen generator 20 based on the change in the air supply amount of the air supply port 171 and the corresponding relationship.

[0155] In some embodiments, referring to FIG. 9 , the method includes S31 to S33 .

[0156] S31, obtaining the frequency change of the fan 172.

[0157] S32 , obtaining the frequency change of the oxygen generator 20 corresponding to the frequency change of the fan 172 .

[0158] S33, controlling the operation of the oxygen generator 20 according to the frequency change of the oxygen generator 20, so that the oxygen generator 20 can reach the corresponding frequency change, thereby achieving the corresponding oxygen production amount change, and then making the oxygen concentration at the air supply port 171 within the set concentration range.

[0159] In some embodiments, referring to FIG. 10 , the method includes S41 to S42 .

[0160] S41 , obtaining a corresponding relationship between a preset frequency change of the blower 172 and a frequency change of the oxygen generator 20 .

[0161] S42 , obtaining the frequency change of the corresponding oxygen generator 20 according to the frequency change of the fan 172 and the corresponding relationship.

[0162] In some embodiments, referring to FIG. 11 , the method includes S51 to S53 .

[0163] S51, obtaining the air supply volume of the air supply port 171.

[0164] S52: The oxygen production amount of the oxygen generator 20 corresponding to the air supply amount of the air supply port 171 is acquired.

[0165] S53: Control the operation of the oxygen production device 20 according to the obtained oxygen production amount, so that the oxygen production device 20 reaches the corresponding oxygen production amount, thereby making the oxygen concentration at the air supply port 171 within the set concentration range.

[0166] In some embodiments, referring to FIG. 12 , the method includes S61 to S62 .

[0167] S61 , obtaining a correspondence between the preset air supply volume of the air supply port 171 and the oxygen production volume of the oxygen production device 20 .

[0168] S62: Obtain the corresponding oxygen production amount according to the air supply volume of the air supply port 171 and the corresponding relationship.

[0169] In some embodiments, referring to FIG. 13 , the method includes S71 to S73 .

[0170] S71, obtaining the frequency of the fan 172.

[0171] S72 , obtaining the frequency of the oxygen generator 20 corresponding to the frequency of the fan 172 .

[0172] S73: Control the operation of the oxygen generator 20 according to the obtained frequency of the oxygen generator 20, so that the oxygen generator 20 reaches the corresponding frequency.

[0173] In some embodiments, referring to FIG. 14 , the method includes S81 to S82 .

[0174] S81 , obtaining a corresponding relationship between the preset frequency of the fan 172 and the frequency of the oxygen generator 20 .

[0175] S82: Obtain the frequency of the corresponding oxygen generator 20 according to the frequency of the fan 172 and the corresponding relationship.

[0176] If factors such as large-scale personnel movement cause indoor oxygen concentration changes while the air volume of the modular air conditioner remains unchanged, the frequency of the fan in the modular air conditioner also remains unchanged. Therefore, it is impossible to obtain the corresponding frequency change of the oxygen generator 20 based on the frequency change of the fan 172 and thus control the oxygen generator 20. In this case, an oxygen concentration detection device is required to detect the indoor oxygen concentration and compare it with the set indoor concentration range.

[0177] In some embodiments, the combined air conditioner further includes an oxygen concentration detection device coupled to the controller 600 , which is further configured to obtain the indoor oxygen concentration and control the frequency of the oxygen generator 20 based on the relationship between the indoor oxygen concentration and a set indoor concentration range.

[0178] In some embodiments, the controller 600 is further configured to: if it is determined that the indoor oxygen concentration is less than the lower limit of the set indoor concentration range, control the oxygen generator 20 to increase the frequency, thereby increasing the oxygen production amount and thus improving the outlet oxygen concentration.

[0179] In some embodiments, the controller 600 is further configured to: if it is determined that the indoor oxygen concentration is higher than the upper limit of the set indoor concentration range, control the oxygen generator 20 to reduce the frequency, thereby reducing the oxygen production amount and thus reducing the outlet oxygen concentration.

[0180] In some embodiments, the controller 600 is further configured to: if it is determined that the indoor oxygen concentration is within the set indoor concentration range, control the oxygen generator 20 to maintain the current frequency unchanged, thereby maintaining the current oxygen production amount and the current outlet oxygen concentration.

[0181] Through the above configuration, the controller 600 can change the frequency of the oxygen generator 20 according to the indoor oxygen concentration, thereby changing the oxygen production amount and the indoor oxygen concentration, simplifying the control process of the oxygen production amount of the oxygen generator 20.

[0182] In some embodiments, the oxygen production capacity of the oxygen generator 20 is adjusted based on the oxygen concentration detection value and a set value. Specifically, if the oxygen concentration detection value is below the lower limit of the specified value, the frequency of the air compressor 23 is increased, drawing in more air and thereby increasing the oxygen production capacity. If the oxygen concentration detection value is above the upper limit of the specified value, the frequency of the air compressor 23 is decreased, reducing the amount of air drawn in and thereby reducing the oxygen production capacity. If the oxygen concentration detection value is within the specified range, the air compressor 23 maintains its current frequency, and the amount of air drawn in remains unchanged.

[0183] Some embodiments of the present disclosure also provide another method for controlling the air conditioner 1000 . Referring to FIG. 16 , the method includes S91 to S92 .

[0184] S91, obtaining indoor oxygen concentration.

[0185] S92: Control the frequency of the oxygen generator 20 according to the relationship between the indoor oxygen concentration and the set indoor concentration range.

[0186] In some embodiments, referring to FIG. 17 , the method includes S901 to S906 .

[0187] S901, detect ηO2.

[0188] S902: Determine whether ηO2 < λO2 - δO2. If yes, execute S903; if no, execute S904.

[0189] S903, H increases.

[0190] S904: Determine whether ηO2>λO2+δO2. If yes, execute S905; if no, execute S906.

[0191] S905, H decreases.

[0192] S906, H remains unchanged.

[0193] It should be noted that in FIG17 , ηO2 is the detected oxygen concentration value. λO2 is the specified oxygen concentration value. δO2 is the deviation from the oxygen set value. H is the frequency of the air compressor 23 of the oxygen generator 20. λO2 - δO2 is the lower limit of the specified value. λO2 + δO2 is the upper limit of the specified value.

[0194] In some embodiments, the air conditioner 1000 can adjust not only the temperature of the air but also the humidity of the air. For example, in addition to the cooling mode and the heating mode, the air conditioner 1000 also includes a dehumidification mode.

[0195] It is understandable that when the air conditioner 1000 is in dehumidification mode, the indoor temperature will drop, reducing the temperature comfort. In some embodiments, to ensure temperature comfort, the indoor unit 2 includes two heat exchangers, one heat exchanger is configured to perform humidity regulation, and the other heat exchanger is configured to perform temperature regulation, to ensure that both temperature and humidity can reach the target state, thereby ensuring temperature and humidity comfort.

[0196] In some embodiments, two indoor heat exchangers are provided in the indoor unit 2 .

[0197] For example, the indoor unit 2 further includes a second heat exchanger 201 (dehumidification heat exchanger), and the indoor unit 2 further includes a first adjustment device 202 (dehumidification throttling adjustment device). The second heat exchanger 201 and the first adjustment device 202 are configured to cool or dehumidify.

[0198] The indoor unit 2 further includes a third heat exchanger 203 (reheat heat exchanger) and a second adjustment device 204 (reheat throttling adjustment device). The third heat exchanger 203 and the second adjustment device 204 are configured for heating or reheating.

[0199] In some embodiments, in the indoor unit 2 , the second heat exchanger 201 and the third heat exchanger 203 are sequentially arranged along the air flow direction.

[0200] In some embodiments, the indoor unit 2 is a fresh air unit. The indoor unit 2 may include a second inlet 111 and an air outlet 171. The indoor unit 2 is also equipped with a primary filter and a purification device. Air enters the indoor unit 2 from the fresh air inlet, is purified by the primary filter and the purification device, passes through the second heat exchanger 201 and the third heat exchanger 203, and is then delivered into the room through the air outlet 171.

[0201] In some embodiments, the indoor unit 2 is an air conditioning unit and may include a third inlet 112 and an air outlet 171 . Air enters the indoor unit 2 from the third inlet 112 , passes through the second heat exchanger 201 and the third heat exchanger 203 , and is then delivered to the room through the air outlet 171 .

[0202] When the air conditioner 1000 needs to cool, only the second heat exchanger 201 and the first adjustment device 202 in the indoor unit 2 are working.

[0203] When the air conditioner 1000 operates in cooling mode, the compressor 101 , the first heat exchanger 103 , the first regulating device 202 , and the second heat exchanger 201 are connected in sequence through a refrigerant pipeline to realize the cooling function of the indoor unit 2 .

[0204] When the air conditioner 1000 needs to heat, only the third heat exchanger 203 and the second regulating device 204 in the indoor unit 2 are working.

[0205] When the air conditioner 1000 operates in heating mode, the compressor 101 , the third heat exchanger 203 , the second regulating device 204 , the first regulating device 202 , and the second heat exchanger 201 are connected in sequence through a refrigerant pipeline to realize the heating function of the indoor unit 2 .

[0206] When the air conditioner 1000 needs to dehumidify, the second heat exchanger 201 and the first regulating device 202 in the indoor unit 2 work, and the third heat exchanger 203 and the second regulating device 204 determine whether to work according to the indoor temperature and the target set temperature.

[0207] When air conditioner 1000 operates in reheat dehumidification mode, compressor 101, third heat exchanger 203, second regulating device 204, first regulating device 202, and second heat exchanger 201 are sequentially connected via refrigerant piping to achieve the reheat function. Compressor 101, first heat exchanger 103, first regulating device 202, and third heat exchanger 203 are sequentially connected via refrigerant piping to achieve the dehumidification function.

[0208] It is understandable that in the reheat dehumidification mode, the air is first cooled and dehumidified by the second heat exchanger 201, and then heated by the third heat exchanger 203. In this way, the humidity of the air can be reduced while maintaining the temperature of the air.

[0209] In the example of Figure 18, the refrigerant pipeline sequentially connects the compressor 101, the four-way valve, the third heat exchanger 203, the second regulating device 204, the branch pipe 301, the first regulating device 202, the second heat exchanger 201, and the compressor 101. The refrigerant pipeline sequentially connects the compressor 101, the four-way valve 102, the first heat exchanger 103, the branch pipe 301, the first regulating device 202, the second heat exchanger 201, and the compressor 101.

[0210] In the example of FIG. 19 , when the air conditioner 1000 operates in the reheat dehumidification mode, the refrigerant circulation in the air conditioner 1000 includes the following two stages.

[0211] In the first stage, the refrigerant circulation path for achieving the dehumidification function includes: the high-temperature, high-pressure gaseous refrigerant from the compressor 101 of outdoor unit 1 is converted into a medium-temperature, high-pressure liquid refrigerant through the first heat exchanger 103, then passes through the liquid pipe 302, the branch pipe 301, and the first regulating device 202 to enter the second heat exchanger 201. In indoor unit 2, the refrigerant first passes through the first regulating device 202 for throttling, cooling, and pressure reduction, then passes through the second heat exchanger 201 for evaporation and heat absorption. The gaseous refrigerant then flows out of the second gas pipe 304, returns to the gas-liquid separator in the outdoor unit 1, and enters the suction port of the compressor 101.

[0212] In the second stage, the refrigerant circulation flow path for realizing the reheating function includes: the high-temperature and high-pressure gaseous refrigerant coming out of the compressor 101 of the outdoor unit 1 enters the third heat exchanger 203 through the first air pipe 303, condenses and dissipates heat in the third heat exchanger 203 to become a medium-temperature and high-pressure liquid refrigerant, passes through the second regulating device 204, and then passes through the branch pipe 301, the first regulating device 202, the second heat exchanger 201, enters the second air pipe 304 and flows out, returns to the gas-liquid separator of the outdoor unit 1, and enters the air intake of the compressor 101.

[0213] The high-temperature and high-pressure gaseous refrigerant coming out of the compressor 101 of the outdoor unit 1 enters the third heat exchanger 203 through the first gas pipe 303, which greatly increases the reheating capacity of the third heat exchanger 203 and can quickly and timely ensure temperature comfort.

[0214] In the example of Figure 20, when the air conditioner 1000 operates in the heating mode, the first regulating device 202 is controlled to be closed, and the refrigerant circulation direction in the system includes: the high-temperature and high-pressure gaseous refrigerant coming out of the compressor 101 of the outdoor unit 1 enters the third heat exchanger 203 through the first gas pipe 303, condenses and dissipates heat in the third heat exchanger 203 to become a medium-temperature and high-pressure liquid refrigerant, passes through the second regulating device 204, and then passes through the branch pipe 301 and the liquid pipe 302 to enter the first heat exchanger 103 for evaporation and heat absorption. The gaseous refrigerant returns to the gas-liquid separator of the outdoor unit 1 from the low-pressure pipeline and enters the intake port of the compressor 101.

[0215] In some embodiments, referring to FIG. 21A , the air conditioner 1000 further includes a third sensor 503 (indoor humidity sensor). The third sensor 503 is located indoors and is configured to detect the indoor humidity Hr. The air conditioner 1000 further includes a second setting component 504 (target humidity setting component). The second setting component 504 is configured to set a target humidity setting Hs.

[0216] In some embodiments, the second setting component 504 is disposed in a host computer, and the target setting humidity Hs is set by the host computer.

[0217] In some embodiments, the second setting component 504 is provided in a remote controller, and the target humidity Hs is set via the remote controller.

[0218] In some embodiments, the second setting component 504 is disposed in a wired controller, and the target setting temperature Hs is set via the wired controller.

[0219] In some embodiments, the second setting component 504 is disposed in a control panel, and the target humidity Hs is set through the control panel.

[0220] In some embodiments, the controller 600 is further configured to determine a second target frequency value u1 (t) of the compressor 101 according to the indoor humidity Hr and the target set humidity Hs.

[0221] In some embodiments, the air conditioner 1000 determines the second target frequency u1(t) of the compressor 101 based on the indoor humidity Hr and the target humidity Hs using a proportional-integral-differential (PID) algorithm. e1(t) = Hr - Hs (Formula 1)

[0222] Hr is the relative humidity detected by the third sensor. Hs is the target relative humidity set by the second setting component. e1(t) serves as the input for PID control.

[0223] In some embodiments, u1(t) serves as the output of the PID controller and the input of the controlled object. Therefore, the control law of the simulated PID controller is: u1(t) = Kphe1(t) + Kih∑e1(t) + Kdh(e1(t) - e1(t-1)) (Formula 2)

[0224] It should be noted that the three PID coefficients are: Kph, Kih, Kdh, which are PID control constants.

[0225] In some embodiments, the controller 600 may determine the first target frequency value u1(t) of the compressor 101 according to the indoor humidity Hr and the target set humidity Hs by using a proportional-integral (PI) algorithm or the like.

[0226] In some embodiments, referring to FIG21A , the air conditioner 1000 further includes a first sensor 501 (indoor temperature sensor), which is located indoors and configured to detect the indoor temperature. The air conditioner 1000 further includes a first setting component 502 (target temperature setting component), which is configured to set a target set temperature.

[0227] In some embodiments, the first setting component 502 is disposed in a host computer, and the target temperature setting is set by the host computer. It should be noted that the host computer refers to a computer that can directly issue control commands, and the host computer screen can display various signal changes (such as temperature changes, etc.).

[0228] In some embodiments, the first setting component 502 is provided in a remote controller, and the target setting temperature is set via the remote controller.

[0229] In some embodiments, the first setting component 502 is disposed in a wired controller, and the target setting temperature is set via the wired controller.

[0230] In some embodiments, the first setting component 502 is disposed in a control panel, and the target setting temperature is set through the control panel.

[0231] In some embodiments, the controller 600 is further configured to obtain an indoor temperature Tr and a target set temperature Ts, determine a first target frequency value u(t) of the compressor 101 based on the indoor temperature Tr and the target set temperature Ts, determine a liquid pipe temperature value TL between the third heat exchanger 203 and the second regulating device 204 based on the first target frequency value u(t) of the compressor 101, and adjust the opening degree of the second regulating device 204 based on the liquid pipe temperature value TL and a target subcooling degree SCo of the third heat exchanger 203.

[0232] In some embodiments, the controller 600 determines the first target frequency value u(t) of the compressor 101 according to the internal temperature Tr and the target set temperature Ts using a PID algorithm. e(t) = Tr - Ts (Formula 3)

[0233] Tr is the indoor temperature detected by the first sensor 501. Ts is the target setting temperature set by the first setting component 502. e(t) serves as the input of the PID control.

[0234] In some embodiments, u(t) serves as the output of the PID controller and the input of the controlled object. Therefore, the control law of the simulated PID controller is: u(t) = Kpte(t) + Kit∑e(t) + Kdt(e(t) - e(t-1)) (Formula 4)

[0235] It should be noted that the three PID coefficients are: Kpt, Kit, Kdt, which are PID control constants.

[0236] In some embodiments, the controller 600 determines the first target frequency value u(t) of the compressor 101 according to the indoor temperature Tr and the target set temperature Ts by using a PI algorithm or the like.

[0237] In some embodiments, the controller 600 is further configured to control the operating frequency of the compressor 101 according to the larger value of the second target frequency value u1(t) of the compressor 101 and the temperature requirement frequency u(t) of the compressor 101 so as to meet the temperature or humidity requirements as soon as possible.

[0238] In some embodiments, the second target frequency value u1(t) of the compressor 101 and the compressor temperature demand frequency u(t) are 0-bV electrical signals, and the capacity output of the second heat exchanger 201 and the third heat exchanger 203 are controlled by regulating the electrical signals.

[0239] In some embodiments, the controller 600 is further configured to determine a liquid pipe temperature value TL between the third heat exchanger 203 and the second regulating device 204 according to the first target frequency value u(t) of the compressor 101 .

[0240] In some embodiments, the air conditioner 1000 includes a second sensor 206 (reheat heat exchanger inlet air temperature sensor), and the second sensor 206 is configured to detect the inlet air temperature Ti of the third heat exchanger 203 .

[0241] For example, the second sensor 206 of the third heat exchanger 203 is located at the air inlet end of the third heat exchanger 203 .

[0242] In the example of FIG. 18 , the second sensor 206 is located between the third heat exchanger 203 and the second heat exchanger 201 .

[0243] In some embodiments, the controller 600 is further configured to determine the liquid pipe temperature TL of the refrigerant pipeline between the third heat exchanger 203 and the second regulating device 204 according to the first target frequency value u(t) of the compressor 101 and the air inlet temperature Ti of the third heat exchanger 203 .

[0244] In some embodiments, the controller 600 is further configured to obtain a predetermined correspondence between a temperature requirement frequency range of the compressor 101 and a liquid pipe temperature value TL.

[0245] It can be understood that different temperature demand frequency ranges of the compressor 101 correspond to different liquid pipe temperature values ​​TL.

[0246] The liquid pipe temperature value TL is positively correlated with the temperature requirement frequency range of the compressor 101 , that is, the smaller the temperature requirement frequency range of the compressor 101 is, the smaller the liquid pipe temperature value TL is; and the larger the temperature requirement frequency range of the compressor 101 is, the larger the liquid pipe temperature value TL is.

[0247] The liquid pipe temperature value TL is determined by the inlet air temperature Ti of the third heat exchanger 203 .

[0248] In the example of FIG. 21B , the temperature demand frequency range of the compressor 101 includes a first range, a second range, and a third range.

[0249] In some embodiments, the liquid pipe temperature value TL1 corresponding to the first range is the difference between the inlet air temperature Ti of the third heat exchanger 203 and the first set value A1, that is, TL1 = Ti - A1.

[0250] The liquid pipe temperature value TL2 corresponding to the second range is the air inlet temperature Ti of the third heat exchanger 203. That is, TL2 = Ti.

[0251] The liquid pipe temperature value TL2 corresponding to the third range is the sum of the inlet air temperature Ti of the third heat exchanger 203 and the second set value A2, that is, TL3 = Ti + A2.

[0252] The first set value A1 and the second set value A2 are the same or different.

[0253] In some embodiments, the liquid pipe temperature value TL1 corresponding to the first range is the difference between the corrected value Ti_SCaux of the inlet air temperature Ti of the third heat exchanger 203 and the first set value A1, that is, TL1 = Ti_SCaux - A1.

[0254] The liquid pipe temperature value TL2 corresponding to the second range is the correction value Ti_SCaux of the inlet air temperature Ti of the third heat exchanger 203. That is, TL2 = Ti_SCaux.

[0255] The liquid pipe temperature value TL3 corresponding to the third range is the sum of the correction value Ti_SCaux of the inlet air temperature Ti of the third heat exchanger 203 and the second set value A2, that is, TL3 = Ti_SCaux + A2.

[0256] The first set value A1 and the second set value A2 are the same or different.

[0257] Ti_SCaux=Ti+correction coefficient p.

[0258] It can be understood that the first range is smaller than the second range, and the second range is smaller than the third range.

[0259] In some embodiments, the controller 600 is further configured to calculate the subcooling degree SC of the third heat exchanger 203 according to the liquid pipe temperature value TL, and adjust the opening degree of the second regulating device 204 according to the subcooling degree SC of the third heat exchanger 203 and the target subcooling degree SCo of the third heat exchanger 203.

[0260] If it is determined that the degree of subcooling SC of the third heat exchanger 203 is less than the target degree of subcooling SCo of the third heat exchanger 203 , the opening degree of the second regulating device 204 is reduced.

[0261] If it is determined that the degree of subcooling SC of the third heat exchanger 203 is greater than the target degree of subcooling SCo of the third heat exchanger 203 , the opening degree of the second regulating device 204 is increased.

[0262] If it is determined that the subcooling degree SC of the third heat exchanger 203 is equal to the target subcooling degree SCo of the third heat exchanger 203 , the opening degree of the second regulating device 204 is maintained.

[0263] In some embodiments, the air conditioner 1000 further includes a detection component 106 (compressor exhaust pressure detection component). The detection component 13 is configured to detect the exhaust pressure of the compressor 101.

[0264] In some embodiments, the controller 600 is further configured to calculate the saturation temperature Tc according to the exhaust pressure of the compressor 101 .

[0265] The subcooling degree SC of the third heat exchanger 203 is calculated based on the saturation temperature Tc and the liquid pipe temperature value TL. The subcooling degree SC of the third heat exchanger 203 = saturation temperature Tc - liquid pipe temperature value TL + correction value.

[0266] The target degree of subcooling SCo of the third heat exchanger 203 is calculated based on the saturation temperature Tc and the inlet air temperature Ti of the third heat exchanger 203 .

[0267] In some embodiments, the target subcooling degree SCo of the third heat exchanger 203 = saturation temperature Tc - inlet air temperature Ti.

[0268] In some embodiments, the target subcooling degree SCo of the third heat exchanger 203 = the saturation temperature Tc - the correction value Ti_SCaux of the inlet air temperature Ti.

[0269] In some embodiments, the target subcooling degree SCo of the third heat exchanger 203 is (SCo min , SCo max ) range.

[0270] In some embodiments, the controller 600 is further configured to adjust the opening of the second regulating device 204 according to the subcooling degree SC of the third heat exchanger 203 and the target subcooling degree SCo of the third heat exchanger 203, so that the subcooling degree SC of the third heat exchanger 203 is adjusted toward the target subcooling degree SCo.

[0271] In some embodiments, the controller 600 uses a PID algorithm to adjust the opening of the second regulating device 204 based on the subcooling degree SC of the third heat exchanger 203 and the target subcooling degree SCo of the third heat exchanger 203. ΔEVI(n)=Kp×(ΔSC(n)-ΔSC(n-1))+Ki×ΔSC(n) (Formula 5)

[0272] It should be noted that ΔEVI(n) is the opening of the second regulating device 204. ΔSC(n) is SC-SCo. ΔSC(n-1) is the previous ΔSC(n), i.e., the ΔSC(n) calculated last time. Kp and Ki can be constant values ​​and can be adjusted according to different situations.

[0273] When the controller 600 adjusts the opening of the second regulating device 204 according to the supercooling degree SC and the target supercooling degree SCo, if it is determined that the indoor temperature Tr reaches the target set temperature Ts threshold, it means that the temperature demand is met and the adjustment of the opening of the second regulating device 204 is stopped.

[0274] In the example of FIG. 25 , since the indoor humidity decreases when the air conditioner 1000 is in the heating mode, resulting in indoor dryness, in order to increase the indoor humidity, in some embodiments, referring to FIG. 21A , the air conditioner 1000 further includes a humidifying device 506 .

[0275] The controller 600 is also configured to: when the third heat exchanger 203 is for heating, control the heat exchange capacity of the third heat exchanger 203 according to the indoor temperature Tr and the target set temperature Ts. At this time, the second regulating device 204 is fully open, and the controller 600 controls the operating frequency of the compressor 101 according to the indoor temperature Tr and the target set temperature Ts.

[0276] In some embodiments, the controller 600 controls the humidification amount of the humidifying device 506 according to the indoor humidity Hr and the target set humidity Hs.

[0277] In some embodiments, the controller 600 controls the humidification amount of the humidifying device 506 according to the indoor humidity Hr and the target set humidity Hs by using a PID algorithm.

[0278] In the example of FIG. 27 , if the air conditioner 1000 includes a host computer, the controller 600 receives the communication protocol sent by the host computer. If the communication protocol is determined to be the first communication protocol, the controller 600 controls the air conditioner 1000 to operate in a reheat dehumidification mode, in which case the third heat exchanger 203 operates in a reheat mode and the second heat exchanger 201 operates in a cooling mode. If the communication protocol is determined to be the second communication protocol, the controller 600 controls the air conditioner 1000 to operate in a heating mode, in which case the third heat exchanger 203 operates in a heating mode and the second heat exchanger 201 is deactivated.

[0279] It can be understood that the second heat exchanger 201 stops working by controlling the first regulating device 202 to be closed.

[0280] The first communication protocol can be a cooling mode set by the user through the operation screen control interface, which can be identified by the cooling mode. As long as the communication protocol includes the cooling mode, the third heat exchanger 203 performs reheating control, that is, the second regulating device 204 is turned on.

[0281] The host computer may also develop a protocol through a protocol converter. For example, the host computer may develop protocol P through a protocol converter. If it is determined that the host computer sends protocol P and the air conditioner 1000 receives protocol P, the third heat exchanger 203 performs reheat control. In reheat mode, the second regulating device 204 is turned on.

[0282] The content of the P protocol may be, for example: transmitting the low wind signal and simultaneously transmitting relevant parameters for adjusting the second adjusting device 204 .

[0283] The second communication protocol may be a heating mode set by the user through the operation screen control interface, and may be identified by the heating mode. As long as the communication protocol includes the heating mode, the third heat exchanger 203 performs heating control.

[0284] The host computer can also develop a protocol using a protocol converter. For example, the host computer can develop protocol Q using a protocol converter. If it is determined that the host computer sends protocol Q and the air conditioner 1000 receives protocol Q, the third heat exchanger 203 will perform heating control. In heating mode, the first regulating device 202 is closed and the second regulating device 204 is open.

[0285] The content of the Q protocol may be, for example: transmitting a non-low-wind signal. It should be noted that the low-wind protocol refers to a protocol content that is easy to distinguish, and the low-wind protocol does not need to be confused with other communication protocols other than itself.

[0286] In some embodiments, the air conditioner 1000 (e.g., the controller 600) is further configured to receive a communication protocol sent by a host computer. If the communication protocol is determined to be the first communication protocol, the third heat exchanger 203 is configured to be in reheat mode and the second heat exchanger 201 is configured to be in cooling mode. If the communication protocol is determined to be the second communication protocol, the third heat exchanger 203 is configured to be in heating mode and the second heat exchanger 201 is deactivated.

[0287] It will be appreciated that when air conditioner 1000 operates in reheat dehumidification mode, compressor 101, third heat exchanger 203, second regulating device 204, first regulating device 202, and second heat exchanger 201 are sequentially connected via refrigerant piping. Consequently, the refrigerant flowing out of compressor 101 is reheated by third heat exchanger 203, increasing the heat capacity of third heat exchanger 203. Air conditioner 1000 determines the liquid pipe temperature between third heat exchanger 203 and second regulating device 204 based on the first target frequency value of compressor 101 determined by the indoor temperature and the target set temperature. This determined liquid pipe temperature is the target liquid pipe temperature, meaning the air handling system must operate for a period of time before the liquid pipe temperature reaches the target liquid pipe temperature. Therefore, the opening of the second regulating device is adjusted based on the target liquid pipe temperature and the target subcooling degree. The adjustment rate can be varied as needed, thereby quickly reaching the desired stable point. Furthermore, the target liquid pipe temperature calculated in this manner is unaffected by factors such as system pressure, frequency, and fan operation, thereby improving regulation accuracy.

[0288] Some embodiments of the present disclosure further provide another method for controlling the air conditioner 1000 . Referring to FIG. 22 , when the air conditioner 1000 is in the reheat dehumidification mode, the method for controlling the third heat exchanger 203 includes S101 to S110 .

[0289] S101, obtaining the indoor temperature Tr and the target setting temperature Ts.

[0290] S102: Determine a first target frequency value u(t) of the compressor 101 according to the indoor temperature Tr and the target set temperature Ts.

[0291] S103 , determining a liquid pipe temperature TL between the third heat exchanger 203 and the second regulating device 204 according to the first target frequency value u(t) of the compressor 101 .

[0292] S104 , obtaining a target subcooling degree SCo of the third heat exchanger 203 .

[0293] S105: Determine whether SC is less than SCo. That is, determine whether the subcooling degree SC of the third heat exchanger 203 is less than the target subcooling degree SCo of the third heat exchanger 203. If yes, proceed to S106; if not, proceed to S107.

[0294] S106, reducing the opening of the second regulating device 204, and entering S110.

[0295] S107, determine whether SC=SCo. That is, determine whether the subcooling degree SC of the third heat exchanger 203 is equal to the target subcooling degree SCo of the third heat exchanger 203. If yes, proceed to S108; if not, proceed to S109.

[0296] S108: Keep the opening of the second regulating device 204 unchanged.

[0297] S109: Increase the opening of the second regulating device 204 and proceed to S110.

[0298] S110 determines whether at least one of the following conditions is met: the temperature reaches a preset requirement, or SC = SCo. Specifically, it determines whether at least one of the following conditions is met: the indoor temperature Tr reaches within the target set temperature Ts threshold, or the subcooling degree SC of the third heat exchanger 203 is equal to the target subcooling degree SCo. If either condition is met, the process proceeds to S108; if neither condition is met, the process proceeds to S105.

[0299] In some embodiments, referring to FIG. 23 , a control method of the air conditioner 1000 in the reheat dehumidification mode includes S111 to S121 .

[0300] S111 , obtaining the indoor humidity Hr and the target humidity Hs, and obtaining the indoor temperature Tr and the target temperature Ts.

[0301] S112 , determining a second target frequency value u1 (t) of the compressor 101 according to the indoor humidity Hr and the target setting humidity Hs, and determining a first target frequency value u (t) of the compressor 101 according to the indoor temperature Tr and the target setting temperature Ts.

[0302] S113 , controlling the operating frequency of the compressor 101 according to the second target frequency value u1 (t) of the compressor 101 .

[0303] S114 , determining a liquid pipe temperature TL between the third heat exchanger 203 and the second regulating device 204 according to the first target frequency value u(t) of the compressor 101 .

[0304] S115 , obtaining a target subcooling degree SCo of the third heat exchanger 203 .

[0305] S116: Determine whether the subcooling degree SC of the third heat exchanger 203 is less than the target subcooling degree SCo of the third heat exchanger 203. If yes, proceed to S117; if not, proceed to S118.

[0306] S117, reduce the opening of the second regulating device 204, and enter S121.

[0307] S118, determining whether the subcooling degree SC of the third heat exchanger 203 is equal to the target subcooling degree SCo of the third heat exchanger 203, if so, proceeding to S119, if not, proceeding to S120.

[0308] S119, keeping the opening of the second regulating device 204 unchanged.

[0309] S120, increase the opening of the second regulating device 204, and enter S121.

[0310] S121 determines whether at least one of the following conditions is met: the indoor temperature reaches the required temperature or SC = SCo. Specifically, the determination is made whether at least one of the following conditions is met: the indoor temperature reaches within the target set temperature threshold or the subcooling degree of the third heat exchanger 203 is equal to the target subcooling degree. If so, the process proceeds to S119. If not, the process proceeds to S116.

[0311] In some embodiments, referring to FIG. 24 , a control method of the air conditioner 1000 in the reheat dehumidification mode includes S131 to S141 .

[0312] S131, obtaining the indoor humidity Hr and the target setting humidity Hs, and obtaining the indoor temperature Tr and the target setting temperature Ts.

[0313] S132, determining the second target frequency value u1(t) of the compressor 101 according to the indoor humidity Hr and the target setting humidity Hs, and determining the first target frequency value u(t) of the compressor 101 according to the indoor temperature Tr and the target setting temperature Ts.

[0314] S133 , controlling the operating frequency of the compressor 101 according to the larger value of the second target frequency value u1 ( t ) of the compressor 101 and the first target frequency value u ( t ) of the compressor 101 .

[0315] S134 , determining a liquid pipe temperature TL between the third heat exchanger 203 and the second regulating device 204 according to the first target frequency value u(t) of the compressor 101 .

[0316] S135 , obtaining a target degree of subcooling SCo of the third heat exchanger 203 .

[0317] S136: Determine whether the subcooling degree of the third heat exchanger 203 is less than the target subcooling degree of the third heat exchanger 203. If yes, proceed to S137; if not, proceed to S138.

[0318] S137, reduce the opening of the second regulating device 204, and enter S141.

[0319] S138: Determine whether the subcooling degree SC of the third heat exchanger 203 is equal to the target subcooling degree SCo of the third heat exchanger 203. If yes, proceed to S139; if not, proceed to S140.

[0320] S139, keeping the opening of the second regulating device 204 unchanged.

[0321] S140, increase the opening of the second regulating device 204, and continue to execute S141.

[0322] S141 determines whether at least one of the following conditions is met: the indoor temperature reaches the required temperature or SC = SCo. Specifically, it determines whether at least one of the following conditions is met: the indoor temperature reaches within the target set temperature threshold, or the subcooling degree SC of the third heat exchanger 203 is equal to the target subcooling degree SCo. If so, the process proceeds to S139. If not, the process proceeds to S136.

[0323] In some embodiments, referring to FIG. 26 , a method of controlling the air conditioner 1000 in the heating mode includes steps S151 to S156 .

[0324] S151, obtaining the indoor temperature Tr and the target setting temperature Ts, and obtaining the indoor humidity Hr and the target setting humidity Hs.

[0325] S152: Determine a first target frequency value u(t) of the compressor 101 according to the indoor temperature Tr and the target set temperature Ts.

[0326] S153 , controlling the operating frequency of the compressor 101 according to the first target frequency value u(t) of the compressor 101 .

[0327] S154: Determine whether the humidity meets the requirement. That is, determine whether the indoor humidity Hr is within the target humidity Hs threshold range. If so, proceed to S155; if not, proceed to S156.

[0328] S155, turn off the heating device 505.

[0329] S156, adjust the humidification amount of the humidification device 506 and enter S154.

[0330] In some embodiments, referring to FIG. 28 , the control process of the air conditioner 1000 receiving information from the host computer includes S161 to S163 .

[0331] S161, receiving a communication protocol. If the communication protocol is determined to be the first communication protocol, proceed to S162. If the communication protocol is determined to be the second communication protocol, proceed to S163.

[0332] S162, enter the reheat dehumidification control mode. Turn on the first regulating device 202, turn on the second regulating device 204, and perform control according to the control logic of Figure 23 or Figure 24.

[0333] S163, entering the heating control mode, closing the first regulating device 202, opening the second regulating device 204, and performing control according to the control logic of FIG22.

[0334] It should be noted that the air volume of a modular air conditioner is typically rated to ensure comfort. To achieve this, some modular air conditioners in the related art are equipped with a fixed-frequency motor of corresponding power based on their rated air volume. It is understood that the wind speed provided by the fixed-frequency motor is a fixed value.

[0335] In some applications where high accuracy is required in the air delivery volume of modular air conditioners, modular air conditioners are equipped with variable-frequency motors. The speed of these motors is adjustable. If the static pressure within the modular air conditioner or the air delivery duct changes, the motor can adjust its frequency to alter the air delivery speed to maintain the rated air delivery volume. For example, the motor defaults to a fixed size for the air delivery port 171, requiring only the wind speed to be adjusted to maintain a constant air delivery volume. This method of achieving a constant air delivery volume requires the unit to be equipped with an expensive wind speed sensor.

[0336] Some embodiments of the present disclosure provide a combined air conditioner that achieves constant air volume through a static pressure recognition function.

[0337] 29 , some embodiments of the present disclosure provide a combined air conditioner. The structure of the combined air conditioner can refer to the above description of the combined air conditioner shown in FIG1 , and will not be repeated here.

[0338] The difference from the combined air conditioner shown in FIG. 1 is that the combined air conditioner shown in FIG. 29 may not be provided with the oxygen generator 20 and the first inlet 113 .

[0339] Referring to Figure 29 , the first section 11 includes at least one of a second inlet 111 and a third inlet 112. Outdoor fresh air enters the first section 11 through the second inlet 111, and indoor return air enters the first section 11 through the third inlet 112. Both the second inlet 111 and the third inlet 112 can be opened or closed. When both the second inlet 111 and the third inlet 112 are open, the first section 11 mixes the incoming outdoor fresh air with the indoor return air.

[0340] Of course, the combined air conditioner shown in Figure 29 may also include an oxygen generator 20 and a first inlet 113. In this case, the structure of the combined air conditioner shown in Figure 29 is similar to that of Figure 1.

[0341] 29 , in some embodiments, the combined air conditioner further includes an air supply channel 400 , and the air supply port 171 of the second section 17 is connected to the air supply channel 400 . The air flow in the second section 17 is blown toward the air supply channel 400 through the air supply port 171 and transported to the room through the air supply channel 400 .

[0342] For a specific fan 172, the five curves of equal air volume curve, equal static pressure curve, equal channel curve, equal speed curve and equal power curve are known and clear on the graph with speed as the horizontal axis and power as the vertical axis. The above fitting curve can be obtained through experiments.

[0343] Referring to Figure 30 , 1-1, 1-2, and 1-3 are three isostatic pressure curves, 2-1, 2-2, and 2-3 are three isoair volume curves, and 3-1 and 3-2 are two isochannel curves. For example, the isoair volume curves can be used to obtain the corresponding relationship between speed and power under isoair volume conditions.

[0344] In some embodiments, the controller 600 is further configured to: activate a static pressure identification function, obtain a speed and power value corresponding to the first set static pressure value as a target speed and target power value, control the fan 172 to operate at the target speed, and determine whether the absolute value of the difference between the current power value of the fan 172 and the target power value meets a preset condition.

[0345] If it is determined that the absolute value of the difference does not meet the preset conditions, the set speed is increased or decreased based on the target speed, and the adjusted set speed is used as the new target speed, and the target power value corresponding to the new target speed is obtained. The speed of fan 172 is then adjusted to control fan 172 to operate at the new target speed, and the absolute value of the difference between the current power value of fan 172 and the target power value is re-determined to determine whether it meets the preset conditions. If the absolute value of the difference is determined to meet the preset conditions, static pressure identification is completed, and the static pressure value corresponding to the target power value is used as the static pressure value of air conditioner 1000.

[0346] In some embodiments, the controller 600 is further configured to: activate a static pressure identification function and enter a static pressure identification mode; obtain a speed and power value corresponding to a first set static pressure value as a target speed and target power value; control the fan 172 to operate at the target speed for a set duration; obtain a current power value of the fan 172; calculate the absolute value of the difference between the current power value of the fan 172 and the target power value; and determine whether the absolute value of the difference meets a preset condition (a condition for determining successful static pressure identification).

[0347] It should be noted that at the same air volume, there is a corresponding relationship between static pressure, the speed of fan 172, and the power of fan 172. The corresponding relationship between static pressure values, the speed of fan 172, and the power of fan 172 at a constant air volume can be pre-stored in controller 600. This correspondence can be represented by a correspondence table, referred to as a constant air volume table. This facilitates searching for the speed and power values ​​corresponding to the first set static pressure value.

[0348] Some embodiments of the present disclosure provide a modular air conditioner with a static pressure identification function. When the absolute value of the difference between the current power value of fan 172 and the target power value meets a preset condition, static pressure identification is completed, and the static pressure value corresponding to the target power value is the static pressure value of air conditioner 1000. If the absolute value of the difference between the current power value of fan 172 and the target power value does not meet the preset condition, the speed of fan 172 is adjusted, and whether the preset condition is met is re-evaluated.

[0349] The combined air conditioner provided in some embodiments of the present disclosure realizes the recognition of static pressure. In this way, constant air volume control can be achieved without setting up a wind speed sensor, solving the technical problem in the related art that the combined air conditioner does not have a static pressure recognition function and cannot recognize static pressure.

[0350] The combined air conditioner provided in some embodiments of the present disclosure has a more complex structure compared with a duct air conditioner. The static pressure identified by the static pressure identification function is the full static pressure, which includes the static pressure inside the shell of the combined air conditioner 1000 and the static pressure of the air supply channel 400 located outside the shell.

[0351] In some embodiments of the present disclosure, in order to improve the accuracy of the static pressure identification function, the controller 600 is also configured to: before determining whether the absolute value of the difference between the current power value of the fan 172 and the target power value meets the preset conditions, determine whether the current power value is greater than the target power value.

[0352] If the current power value is determined to be greater than the target power value, the speed and power values ​​corresponding to the second set static pressure value are obtained as the target speed and target power values. The fan 172 is controlled to operate at the target speed, and then a determination is made as to whether the absolute value of the difference between the current power value of the fan 172 and the target power value satisfies a preset condition.

[0353] If it is determined that the current power value is less than or equal to the target power value, it is determined whether the absolute value of the difference between the current power value of the fan 172 and the target power value meets a preset condition.

[0354] It should be noted that the second set static pressure value is greater than the first set static pressure value.

[0355] It is understandable that for a DC motor, the electronic control can obtain: the speed and corresponding power of the fan 172. However, the channel, static pressure, and air volume are all unknown. Using the equal air volume curve (it is necessary to first make a fitting curve through experiments to identify the corresponding relationship between speed and power under equal air volume), the speed is continuously tested. When the current power and target power gradually become less than a certain set deviation, it is determined that the target speed has been reached, and the static pressure recognition function can be realized. Constant air volume can be achieved without the need for a wind speed sensor.

[0356] When querying the target power value corresponding to the target speed in the constant air volume table, if it is determined that the target speed is not found in the constant air volume table, the speed closest to the target speed is searched, and then the power value corresponding to the speed is searched as the target power value.

[0357] In some embodiments, the controller 600 is further configured to obtain a preset correspondence between the static pressure value, the speed of the fan 172, and the power value of the fan 172 under constant air volume, and obtain the speed and power value corresponding to the first set static pressure value based on the correspondence.

[0358] In this way, by presetting the correspondence between the static pressure value, the speed of the fan 172, and the power value of the fan 172 under a constant air volume (a fixed rated air volume), and then querying the correspondence, the speed and power values ​​corresponding to the first set static pressure value or the second set static pressure value can be obtained, which is simple, convenient, accurate and fast.

[0359] In some embodiments of the present disclosure, the first set static pressure value is the middle static pressure value in the constant air volume meter, and the second set static pressure value is the maximum static pressure value in the constant air volume meter.

[0360] In some embodiments, the controller 600 is further configured to calculate a value of k1×|ΔP| and determine a value of the set speed ΔRPM according to a relationship between the value of k1×|ΔP| and a set range.

[0361] In this way, the set speed ΔRPM can be limited between the upper limit value H and the lower limit value L of the set range, ensuring an appropriate speed adjustment step and avoiding overshoot.

[0362] In some embodiments, the upper limit of the setting range is H=k2 / (k3×n+k4).

[0363] It should be noted that n is the number of positive and negative switching times of ΔP, and k2, k3, and k4 are all constants greater than 0. As can be seen from this formula, the greater the number of positive and negative switching times n of ΔP, the smaller the upper limit H of the setting range and the smaller the upper limit of the set speed ΔRPM, avoiding excessively large adjustment steps after multiple speed adjustments.

[0364] The number of positive and negative switching times n is reset to zero when the static pressure identification function is started.

[0365] In some embodiments of the present disclosure, k2=60, k3=2, k4=1, that is, the upper limit value of the setting range is H=60 / (2n+1).

[0366] In some embodiments of the present disclosure, the lower limit value of the setting range is L=8.

[0367] For example, the initial value of n is 0. When ΔP is calculated for the first time, ΔP>0, so n=0. When ΔP is calculated for the second time, ΔP<0, so n=1. When ΔP is calculated for the third time, ΔP>0, so n=2. When ΔP is calculated for the fourth time, ΔP>0, so n=2. When ΔP is calculated for the fifth time, ΔP<0, so n=3. And so on.

[0368] By setting the number of positive and negative switching times n, the upper limit value H of the setting range can be changed according to the relationship between the current power and the target power to prevent excessive adjustment.

[0369] In some embodiments, when any of the following conditions is met, it is determined that the preset condition is met.

[0370] |(Pz-Ph) / Ph| is less than or equal to the first set ratio a%;

[0371] |(Pz-Ph) / Ph| is less than or equal to the second set ratio b%, and the number of speed adjustment times m is greater than or equal to the first set number C; or

[0372] |Pz-Ph| is less than or equal to the set difference Po.

[0373] It should be noted that Pz is the current power value of the fan 172, and Ph is the target power value. The first set ratio a% is smaller than the second set ratio b%.

[0374] If |(Pz-Ph) / Ph| ≤ the first set ratio a%, it means that the difference between the current power value and the target power value is smaller than the ratio of the target power value. At this point, it can be accurately determined that the preset conditions are met, and static pressure identification is complete.

[0375] If |(Pz - Ph) / Ph| ≤ the second set ratio b%, and the number of speed adjustments m ≥ the first set number C, then the ratio of the difference between the current power value and the target power value to the target power value is small, and the number of speed adjustments is large. At this point, the preset conditions are accurately determined to be met, and static pressure identification is complete.

[0376] If |Pz-Ph| ≤ the set difference Po, the difference between the current power value and the target power value is within the preset range. At this point, the preset conditions are accurately determined to be met, and static pressure identification is complete.

[0377] It should be noted that the speed adjustment times m are reset to zero when the static pressure identification function is started.

[0378] In some embodiments, when any of the following conditions is met, it is determined that the preset condition is met.

[0379] |(Pz-Ph) / Ph| is less than or equal to the first set ratio a%;

[0380] |(Pz-Ph) / Ph| is less than or equal to the second set ratio b%, and the number of speed adjustment times m is greater than or equal to the first set number C;

[0381] |Pz-Ph| is less than or equal to the set difference Po; or

[0382] The speed adjustment times m is greater than or equal to the second set times D.

[0383] It should be noted that Pz is the current power value of the fan 172, and Ph is the target power value. The first set ratio a% is smaller than the second set ratio b%, and the first set number C is smaller than the second set number D.

[0384] If |(Pz-Ph) / Ph| ≤ the first set ratio a%, it means that the difference between the current power value and the target power value is smaller than the ratio of the target power value. At this point, it can be accurately determined that the preset conditions are met, and static pressure identification is complete.

[0385] If |(Pz - Ph) / Ph| ≤ the second set ratio b%, and the number of speed adjustments m ≥ the first set number C, then the ratio of the difference between the current power value and the target power value to the target power value is small, and the number of speed adjustments is large. At this point, the preset conditions are accurately determined to be met, and static pressure identification is complete.

[0386] If |Pz-Ph| ≤ the set difference Po, the difference between the current power value and the target power value is within the preset range. At this point, the preset conditions can be accurately determined and static pressure identification is complete.

[0387] If it is determined that the number of speed adjustment times m ≥ the second set number D, it means that the number of speed adjustment times is large. At this time, it can be accurately determined that the preset conditions are met and the static pressure identification is completed.

[0388] It should be noted that, in some embodiments of the present disclosure, the values ​​of a, b, C, D, and Po can be set according to different situations of the combined air conditioner.

[0389] In some embodiments, the controller 600 is further configured to determine whether any of the following conditions is satisfied: |(Pz-Ph) / Ph| ≤ a%, |(Pz-Ph) / Ph| ≤ b%, and the number of speed adjustments ≥ C, |Pz-Ph| ≤ Po, and the number of speed adjustments ≥ D. If any of the above conditions is satisfied, static pressure identification is complete.

[0390] In some embodiments, a static pressure identification function start signal is sent to the controller 600 using one of a remote controller and a wired controller, and after the static pressure identification is completed, the identified static pressure value of the air conditioner 1000 is displayed for the user to view.

[0391] The user can select to start the static pressure identification function through one of the remote controller and the wired controller to enter the static pressure identification mode. After the static pressure identification is completed, the static pressure value is displayed. The remote controller / wired controller can also display the static pressure value of the identified air conditioner 1000, which is convenient for the user to check.

[0392] In some embodiments of the present disclosure, the controller 600 is further configured to determine whether the interior of the air conditioner 1000 or the air supply passage 400 is dirty, blocked or damaged based on the identified static pressure value of the air conditioner 1000 .

[0393] When the interior of the air conditioner 1000 or the air supply duct 400 changes, the static pressure value of the air conditioner 1000 will change. Therefore, it is possible to determine whether there is a problem inside the air conditioner 1000 or the air supply duct 400 based on the identified static pressure value of the air conditioner 1000, thereby simplifying the determination process.

[0394] In some embodiments of the present disclosure, the controller 600 is further configured to: upon installation of the air conditioner 1000, activate the static pressure identification function and identify the static pressure value of the air conditioner 1000 as P1. After a set period of time, activate the static pressure identification function and identify the static pressure value of the air conditioner 1000 as P2. If P1 is determined to be less than P2, it is determined that one of the interior of the air conditioner 1000 and the air supply duct 400 is dirty or blocked. If P1 is determined to be greater than P2, it is determined that one of the interior of the air conditioner 1000 and the air supply duct 400 is damaged.

[0395] For example, when a modular air conditioner is newly installed, the user uses the static pressure recognition function to determine that the unit's total static pressure is P1. Six months later, the user uses the static pressure recognition function to determine that the unit's total static pressure is P2. If P1 < P2, the user is prompted to check the air supply duct or the unit's internal components for dirt or blockage. If P1 > P2, the user is prompted to check the air supply duct or internal components (such as filters) for damage.

[0396] By comparing the static pressure values ​​of the air conditioner 1000 identified in different time periods, it is possible to determine whether the interior of the air conditioner 1000 or the air supply passage 400 is dirty, blocked or damaged, thereby simplifying the determination process and improving the determination efficiency.

[0397] It is understood that the above function can be set to prompt the user of duct blockage, internal blockage of the unit, or damaged components. The user can use the static pressure value identified and displayed by the static pressure recognition function in different time periods to determine whether the interior of the air conditioner 1000 or the air supply duct 400 is blocked, or whether the internal components of the air conditioner 1000 are damaged.

[0398] This disclosure proposes a modular air conditioner that can achieve constant air volume through dynamic static pressure recognition. The modular air conditioner is equipped with a DC variable frequency motor and has a static pressure recognition function. The recognized static pressure can be displayed on a controller 600 (remote control or wired controller). The static pressure recognized by the modular air conditioner is the full static pressure of the air conditioner 1000.

[0399] It should be noted that for a static pressure system consisting of a combined air conditioner and an air supply channel 400 with unknown static pressure, the static pressure value of the static pressure system can be quickly identified by using the static pressure identification function, and the identified static pressure value can be displayed on the controller 600 (remote control or wired controller), and the fan 172 can be operated at a speed corresponding to the identified static pressure value, that is, in any air supply channel, the combined air conditioner after static pressure identification can achieve rated constant air volume operation.

[0400] The combined air conditioner provided in some embodiments of the present disclosure can control the error range of the air volume within 10%, thereby achieving constant air volume operation of the combined air conditioner.

[0401] Some embodiments of the present disclosure also provide another method for controlling the air conditioner 1000 . Referring to FIG. 31 , the method further includes S211 to S219 .

[0402] S211: Activate the static pressure identification function and enter the static pressure identification mode, and obtain the speed and power values ​​corresponding to the first set static pressure value as target speed and target power values.

[0403] S212, controlling the fan 172 to operate at the target speed. After the fan 172 is controlled to operate at the target speed for a set period of time, the following S213 is executed.

[0404] S213, obtaining the current power value of the fan 172.

[0405] S214 , calculating the absolute value of the difference between the current power value of the wind turbine 172 and the target power value.

[0406] S215: Determine whether the absolute value of the difference satisfies a preset condition (i.e., a condition for successful static pressure identification). If so, the preset condition is determined to be satisfied, static pressure identification is complete, and S216 is executed. If not, the preset condition is determined not to be satisfied, and S217 is executed.

[0407] S216: The static pressure value corresponding to the target power value is used as the static pressure value of the air conditioner 1000. After the static pressure identification is completed, the static pressure identification mode is exited and the static pressure identification function is turned off. The fan 172 operates at the speed corresponding to the identified static pressure value of the air conditioner 1000.

[0408] S217: Increase or decrease the set speed based on the target speed, and use the adjusted target speed as the new target speed. For example, if the current power value is determined to be greater than the target power value, the set speed is decreased based on the target speed to set the new target speed. This reduces the speed of fan 172. If the current power value is determined to be less than the target power value, the set speed is increased based on the target speed to set the new target speed. This increases the speed of fan 172.

[0409] S218: Obtain a target power value corresponding to the new target speed. For example, the target power value corresponding to the new target speed is obtained by querying a constant air flow meter.

[0410] In step S219, the speed of fan 172 is adjusted to control fan 172 to operate at the new target speed. The speed adjustment number m is incremented by 1. At this point, the current power value of fan 172 is obtained. The process then returns to step S214, where the absolute value of the difference between the current power value of fan 172 and the target power value is recalculated, and a determination is made as to whether the absolute value of the difference satisfies a preset condition.

[0411] In some embodiments, referring to FIG. 32 , between S213 and S214 , the method further includes S221 to S222 .

[0412] S221, determine whether the current power value is greater than the target power value. If not (i.e., the current power value is less than or equal to the target power value), execute S215. If yes (i.e., the current power value is greater than the target power value), execute S222.

[0413] At step S222, the constant air flow meter is queried to obtain the speed and power values ​​corresponding to the second set static pressure value, which are used as the target speed and target power values. Fan 172 is controlled to operate at the target speed and the current power value of fan 172 is obtained. The controller 600 then executes step S214.

[0414] It's understandable that if the current power value is greater than the target power value, it indicates that the first set static pressure value is too low and needs to be increased. In this case, a second set static pressure value can be selected, and the constant air flow meter can be consulted. The speed and power values ​​corresponding to the second set static pressure value can be used as the target speed and target power values. This improves the speed of static pressure identification.

[0415] In some embodiments, referring to FIG. 33 , the method further includes S231 to S232 .

[0416] S231, obtaining the preset correspondence between the static pressure value of the air conditioner 1000, the rotation speed of the fan 172, and the power value of the fan 172 under constant air volume.

[0417] The corresponding relationship is a corresponding relationship between different static pressure values ​​of the air conditioner 1000 and the rotation speed and power of the fan 172. The corresponding relationship is a corresponding table, which can be called a constant air volume table.

[0418] S232: Obtain the rotation speed and power value corresponding to the first set static pressure value according to the corresponding relationship.

[0419] In some embodiments of the present disclosure, referring to FIG. 34 , the method includes S241 to S242 .

[0420] S241: Calculate the value of k1×|ΔP|. That is, calculate the product of k1 and |ΔP|.

[0421] It should be noted that k1 is the speed adjustment coefficient. K1 is a constant greater than 0. For example, k1 = 1. ΔP is the difference between the current power value Pz and the target power value Ph. ΔP = Pz - Ph.

[0422] S242 , determining the value of the set speed ΔRPM based on the relationship between the value of k1×|ΔP| and the set range.

[0423] If k1×|ΔP| is determined to be within the set range, the speed ΔRPM is set to = k1×|ΔP|. It is understood that the larger |ΔP| is, the larger the set speed ΔRPM is, and the larger the speed adjustment step is, thereby accelerating the static pressure identification speed.

[0424] If k1×|ΔP| is greater than the upper limit H of the set range, the speed ΔRPM is set to the upper limit H of the set range, thereby avoiding excessive speed adjustment steps. It can be understood that the upper limit H of the set range is determined based on the number of positive and negative switching times of ΔP.

[0425] If it is determined that k1×|ΔP| is lower than the lower limit value L of the setting range, the speed ΔRPM is set to be equal to the lower limit value L of the setting range, thereby avoiding too small a speed adjustment step.

[0426] In summary, in some embodiments of the present disclosure, the product of k1 and |ΔP| is first calculated, and then the relationship between k1×|ΔP| and the upper limit value H of the set range and the lower limit value L of the set range is compared, and finally the set speed ΔRPM is determined, thereby improving the accuracy of the speed regulation of the fan 172.

[0427] In some embodiments, referring to FIG. 35 , the method includes S251 to S252 .

[0428] S251: Relevant parameters in the static pressure identification process are obtained, and it is determined whether the parameters satisfy any one of |(Pz-Ph) / Ph| ≤ a%, |(Pz-Ph) / Ph| ≤ b%, and the number of speed adjustments ≥ C, |Pz-Ph| ≤ Po, or the number of speed adjustments ≥ D. It is understood that the parameters may include Pz, Ph, the number of speed adjustments, etc.

[0429] S252: If it is determined that the parameter satisfies any one of the above conditions, it is determined that the static pressure identification is completed.

[0430] The implementation process of static pressure identification is described below with reference to Figure 36. Referring to Figure 36, the implementation process of static pressure identification may include S261 to S268.

[0431] S261, under the condition of indoor temperature Ti, obtain the corresponding relationship between different static pressure values ​​under rated air volume and the speed of fan 172, and the power of fan 172, and make a constant air volume table.

[0432] S262: Obtain the speed and power corresponding to the first set static pressure value in the constant air volume meter (e.g., the middle static pressure value in the constant air volume meter) as the target speed and target power values. After controlling fan 172 to operate at the target speed for a time period of t1, obtain the current power value Pz of the motor at that time, and compare this current power value Pz with the target power value Ph (i.e., the power value Ph corresponding to the first set static pressure value in the constant air volume meter).

[0433] S263: Determine whether Pz>Ph. If so, it means the current static pressure of the air conditioner is greater than the first set static pressure value, and proceed to S264. If not, proceed to S265.

[0434] At step S264, the speed and power corresponding to the second set static pressure value in the constant air volume meter (e.g., the maximum static pressure value in the constant air volume meter) are obtained as the target speed and target power values. After controlling fan 172 to operate at the target speed for a period of time t2, the current power value Pz of the motor at that time is measured and compared with the target power value Ph (i.e., the power value Ph corresponding to the second set static pressure value in the constant air volume meter). Then, step S265 is executed.

[0435] S265: Determine whether the preset conditions are met. If yes, execute S268; if not, execute S266.

[0436] If any of the following conditions is determined to be satisfied: |(Pz-Ph) / Ph| ≤ a%; |(Pz-Ph) / Ph| ≤ b%, and the number of speed adjustments ≥ C; |Pz-Ph| ≤ Po; or the number of speed adjustments ≥ D, then the preset conditions are determined to be satisfied, and static pressure identification is complete, i.e., constant air volume is considered to be achieved. The static pressure value corresponding to the target power value is the identified static pressure value of air conditioner 1000. If any of the above conditions is determined not to be satisfied, the speed of fan 172 is adjusted, i.e., S266 is executed below.

[0437] At step S266, if the current power value is greater than the target power value, the speed of fan 172 is reduced by a set speed ΔRPM. In other words, controller 600 lowers the target speed of fan 172. If the current power value is less than the target power value, the speed of fan 172 is increased by a set speed ΔRPM. In other words, controller 600 increases the target speed of fan 172.

[0438] In step S267, if it is determined that the speed of fan 172 has reached the adjusted target speed, the current power value of fan 172 is obtained, and the target power value corresponding to the new target speed in the constant air volume table is obtained. The current power value is compared with the target power value in the constant air volume table. The process then returns to step S265.

[0439] It should be noted that when looking for the target power value corresponding to the new target speed in the constant air volume table, if it is determined that the new target speed is not found in the constant air volume table, you can look for the speed closest to the new target speed, and then look for the power value corresponding to the closest speed as the target power value.

[0440] S268, static pressure identification is completed.

[0441] In some embodiments, referring to FIG. 37 , the method includes S271 to S273 .

[0442] S271 , the user sends a static pressure recognition function start signal to the controller 600 through either the remote controller or the wired controller.

[0443] In step S272, after receiving the static pressure identification function start signal, the controller 600 starts the static pressure identification function and begins to perform static pressure identification.

[0444] After the static pressure identification is completed, the controller 600 sends the identified static pressure value of the air conditioner 1000 to at least one of the display panel, remote control, or wired controller of the air conditioner 1000, and the static pressure value is displayed on at least one of the display panel, remote control, or wired controller to facilitate viewing by the user.

[0445] In some embodiments, referring to FIG. 38 , the method includes S281 to S283 .

[0446] S281, when the air conditioner 1000 is installed, the static pressure identification function is started, and the static pressure value of the air conditioner 1000 identified at this time is P1.

[0447] S282: After a set period of time (eg, six months), the static pressure identification function is started, and the static pressure value of the air conditioner 1000 identified at this time is P2.

[0448] S283: Determine the situation inside the air conditioner 1000 or the air supply passage 400 based on the magnitude relationship between P1 and P2.

[0449] If P1 is less than P2, the air conditioner or air duct is blocked. If P1 is greater than P2, the air conditioner or air duct is damaged. If P1 is equal to P2, the air conditioner or air duct is fine.

[0450] It should be noted that any one of the technical solutions disclosed in the present disclosure can, to a certain extent, solve one or more of the above-mentioned technical problems and achieve certain disclosure purposes; multiple technical disclosures can also be combined into an overall solution to solve one or more of the above-mentioned technical problems and achieve certain disclosure purposes; some of the technical disclosures can also be selected to be combined into an overall solution, while adopting related technologies and inferior solutions, but the inferior trend can be compensated by the means disclosed in this technology, and the above-mentioned one or more technical problems can be solved to a certain extent as a whole and certain disclosure purposes can be achieved; each technical disclosure combined into a complete technical solution constitutes an organic and inseparable overall solution, which solves technical problems as a whole and achieves certain disclosure purposes.

[0451] Any technical disclosure in this disclosure, as well as the recombination of multiple technical disclosures, can form a complete technical solution and can solve one or more of the above-mentioned technical problems and achieve the purpose of disclosure. They all belong to the content of this disclosure and are the content that is directly and unambiguously determined based on the content of this disclosure.

[0452] Those skilled in the art will understand that the scope of the present disclosure is not limited to the above specific embodiments, and that certain elements of the embodiments may be modified and replaced without departing from the spirit of the present application. The scope of the present application is limited by the appended claims.

Claims

1. An air treatment device, comprising: an oxygen generator configured to generate oxygen; The first paragraph includes: a first inlet, through which the oxygen generated by the oxygen production device enters the first section; and at least one of the second inlet or the third inlet; The second inlet is connected to the outside, and the outdoor air enters the first section through the second inlet; the third inlet is connected to the inside, and the indoor air enters the first section through the third inlet; a second section, connected to the first section; the second section includes an air supply port, the air supply port is configured to supply air into the room; and A controller is coupled to the oxygen production device, and the controller is configured to: Calculating the oxygen production capacity of the oxygen production device according to the influencing factors of the required space oxygen; The operation of the oxygen production device is controlled according to the calculated oxygen production amount.

2. The air treatment device according to claim 1, wherein: The controller is also configured to: The oxygen production amount is calculated at least according to the oxygen increase in the space, the oxygen consumption by personnel and the oxygen leakage in the space.

3. The air treatment device according to claim 2, wherein: The controller is also configured to: Obtaining a change in the air supply volume of the air supply outlet; Obtaining a change in oxygen production amount corresponding to the change in air supply amount; The operation of the oxygen production device is controlled according to the change in the oxygen production amount.

4. The air treatment device according to claim 3, wherein: The controller is also configured to: Obtaining a correspondence between a preset change in the air supply volume of the air supply port and a change in the oxygen production volume of the oxygen production device; According to the change in the air supply volume of the air supply port and the corresponding relationship, the change in the oxygen production volume corresponding to the change in the air supply volume of the air supply port is obtained.

5. The air treatment device according to any one of claims 2 to 4, further comprising a fan, wherein the fan is arranged in the second section; The frequency of the fan is positively correlated with the air supply volume of the air supply port; The controller is also configured to: Obtaining a frequency change of the fan; Acquire a frequency change of the oxygen production device corresponding to the frequency change of the fan; The operation of the oxygen generator is controlled according to the frequency change amount of the oxygen generator.

6. The air treatment device according to claim 5, wherein: The controller is also configured to: Obtaining a preset correspondence between the frequency change of the fan and the frequency change of the oxygen generator; According to the frequency change of the fan and the corresponding relationship, the frequency change of the oxygen generator corresponding to the frequency change of the fan is acquired.

7. The air treatment device according to any one of claims 2 to 6, wherein: The controller is also configured to: Obtaining the air supply volume of the air supply outlet; Acquire the oxygen production capacity of the oxygen production device corresponding to the air supply capacity of the air supply port; The operation of the oxygen production device is controlled according to the oxygen production amount.

8. The air treatment device according to claim 7, wherein: The controller is also configured to: Obtaining a correspondence between the air supply volume of a preset air supply port and the oxygen production volume of the oxygen production device; According to the air supply volume of the air supply port and the corresponding relationship, the oxygen production volume of the oxygen production device corresponding to the air supply volume of the air supply port is obtained.

9. The air treatment device according to any one of claims 2 to 4, further comprising a fan, wherein the fan is arranged in the second section; The frequency of the fan is positively correlated with the air supply volume of the air supply port; The controller is also configured to: Obtaining the frequency of the fan; Acquire the frequency of the oxygen generator corresponding to the frequency of the fan; The operation of the oxygen generator is controlled according to the frequency of the oxygen generator.

10. The air treatment device according to claim 9, wherein: The controller is also configured to: Obtaining a preset correspondence between the frequency of the fan and the frequency of the oxygen generator; According to the frequency of the fan and the corresponding relationship, the frequency of the oxygen generator corresponding to the frequency of the fan is acquired.

11. The air treatment device according to any one of claims 1 to 10, wherein: The controller is also configured to: If it is determined that the indoor oxygen concentration is less than the lower limit of the set indoor concentration range, the frequency of controlling the oxygen production device is increased; If it is determined that the indoor oxygen concentration is greater than the upper limit of the set indoor concentration range, the frequency of controlling the oxygen production device is reduced; If it is determined that the indoor oxygen concentration is within the set indoor concentration range, the oxygen production device is controlled to keep the current frequency unchanged.

12. The air treatment device according to any one of claims 1 to 11, wherein: The oxygen production device is independently arranged, and the oxygen produced by the oxygen production device is transported to the first section via a gas transmission pipe.

13. An air treatment device comprising: Second paragraph; a fan, disposed inside the second section; as well as A controller, the controller being configured to: Starting a static pressure identification function, obtaining a rotation speed corresponding to a first set static pressure value as a target rotation speed, and obtaining a power value corresponding to the first set static pressure value as a target power value; wherein the first set static pressure value is a middle static pressure value of a static pressure value range of the air handling equipment; Controlling the fan to operate at a target speed and obtaining a current power value of the fan; If it is determined that the absolute value of the difference between the current power value of the fan and the target power value does not meet the preset condition, the set speed is adjusted based on the target speed, and the adjusted set speed is used as the new target speed to obtain the target power value corresponding to the new target speed; the speed of the fan is adjusted to control the fan to operate at the new target speed, and the current power value of the fan is obtained again; If it is determined that the absolute value of the difference between the current power value and the target power value of the fan meets the preset condition, the static pressure identification is completed, and the static pressure value corresponding to the target power value is used as the static pressure value of the air handling equipment.

14. The air treatment device according to claim 13, wherein: The controller is also configured to: Obtaining the current power value of the fan; If it is determined that the current power value is greater than the target power value, the speed corresponding to the second set static pressure value is obtained as the target speed, and the power value corresponding to the second set static pressure value is obtained as the target power value; the fan is controlled to operate at the target speed, and the current power value of the fan is obtained again; If it is determined that the current power value is less than or equal to the target power value, re-obtaining the current power value of the wind turbine; Wherein, the second set static pressure value is greater than the first set static pressure value.

15. The air treatment device according to claim 13 or 14, wherein: The controller is also configured to: Calculate k1×|ΔP|; where k1 is the speed adjustment coefficient; ΔP is the difference between the current power value and the target power value; If it is determined that k1×|ΔP| is within the set range, then the set speed M=k1×|ΔP|; If it is determined that k1×|ΔP| is greater than the upper limit value H of the setting range, then the setting speed M=the upper limit value H of the setting range; the upper limit value H of the setting range is determined according to the number of positive and negative switching times of ΔP; If it is determined that k1×|ΔP| is less than the lower limit value L of the setting range, the setting speed M=the lower limit value L of the setting range.

16. The air treatment device according to claim 15, wherein: The upper limit value of the setting range is H = k2 / (k3×n+k4); Wherein, n is the number of positive and negative switching of ΔP; k2, k3, and k4 are constants greater than 0.

17. The air treatment device according to any one of claims 13 to 16, wherein: When any of the following conditions is met, it is determined that the preset condition is met: |(Pz-Ph) / Ph| is less than or equal to the first set ratio; |(Pz-Ph) / Ph| is less than or equal to the second set ratio, and the speed adjustment times m is greater than or equal to the first set times; |Pz-Ph| is less than or equal to the set difference; or The speed adjustment times m is greater than or equal to the second set times; Wherein, Pz is the current power value of the fan, Ph is the target power value; the first set ratio is less than the second set ratio; The first set number of times is smaller than the second set number of times.

18. The air treatment device according to any one of claims 13 to 17, wherein: The controller is also configured to: Obtaining a preset correspondence between a static pressure value under a constant air volume, a rotation speed of the fan, and a power value of the fan; According to the corresponding relationship, the rotation speed and the power value corresponding to the first set static pressure value are obtained.

19. The air treatment device according to any one of claims 13 to 18, further comprising: at least one of a remote controller or a wired controller, coupled to the controller; At least one of the remote controller or the wire controller is used to send a static pressure identification function start signal to the controller, and the identified air conditioning static pressure is displayed after the static pressure identification is completed.

20. The air handling device according to any one of claims 13 to 19, further comprising an air supply passage, wherein the second section supplies air to the room through the air supply passage; The controller is also configured to: The dirt, blockage and damage conditions of the interior of the air handling equipment and the interior of the air supply passage are determined according to the identified static pressure value of the air handling equipment.

21. The air treatment device according to claim 20, wherein: The controller is also configured to: When the air conditioner is installed, the static pressure identification function is started, and the static pressure value of the air handling equipment identified is P1; After a set period of time, the static pressure identification function is started, and the static pressure value of the air handling equipment identified is P2; If it is determined that P1 is less than P2, it is determined that dirt or blockage occurs in the interior of the air handling device or in one of the air supply passages; If it is determined that P1 is greater than P2, it is determined that one of the interior of the air handling device and the air supply passage is damaged.

22. An air treatment device comprising: Outdoor unit, including: compressor; and a first heat exchanger; The indoor unit is connected to the outdoor unit and comprises: a second heat exchanger configured to dehumidify the gas flowing therethrough; a first regulating device configured to throttle the refrigerant entering the second heat exchanger; A third heat exchanger configured to heat the dehumidified gas; and a second regulating device configured to throttle the refrigerant flowing out of the third heat exchanger; Wherein, when the air handling equipment is running in the reheat dehumidification mode, the compressor, the third heat exchanger, the second regulating device, the first regulating device and the second heat exchanger are connected in sequence through a refrigerant pipeline; the compressor, the first heat exchanger, the first regulating device and the second heat exchanger are connected in sequence through a refrigerant pipeline; A first sensor configured to detect indoor temperature; A first setting component configured to set a target setting temperature; and A controller, the controller being configured to: determining a first target frequency value of the compressor according to the indoor temperature and the target set temperature; determining a liquid pipe temperature value between the third heat exchanger and the second regulating device according to the first target frequency value; The opening degree of the second regulating device is adjusted according to the liquid pipe temperature value and the target subcooling degree of the third heat exchanger.

23. The air treatment device of claim 22, wherein: The controller is also configured to: calculating the subcooling degree of the third heat exchanger according to the liquid pipe temperature value, and adjusting the opening degree of the second regulating device according to the subcooling degree of the third heat exchanger and the target subcooling degree of the third heat exchanger; If it is determined that the subcooling degree of the third heat exchanger is less than the target subcooling degree of the third heat exchanger, reducing the opening degree of the second regulating device; If it is determined that the subcooling degree of the third heat exchanger is greater than the target subcooling degree of the third heat exchanger, increasing the opening degree of the second regulating device; If it is determined that the subcooling degree of the third heat exchanger is equal to the target subcooling degree of the third heat exchanger, the opening degree of the second regulating device is kept unchanged.

24. The air treatment device according to claim 22 or 23, wherein: The air handling device further includes a second sensor configured to detect an inlet air temperature of the third heat exchanger; The controller is further configured to determine a liquid pipe temperature value of the refrigerant pipeline between the third heat exchanger and the second regulating device according to the first target frequency value and the inlet air temperature of the third heat exchanger.

25. The air treatment device of claim 24, wherein: The controller is also configured to: Obtaining a predetermined correspondence between a temperature requirement frequency range of the compressor and a liquid pipe temperature value; Among them, different temperature requirement frequency ranges of the compressors correspond to different liquid pipe temperature values, the liquid pipe temperature value is positively correlated with the temperature requirement frequency range of the compressor, and the liquid pipe temperature value is determined by the inlet air temperature of the third heat exchanger.

26. The air treatment device of claim 25, wherein: The compressor temperature demand frequency range includes a first range, a second range and a third range; The liquid pipe temperature value corresponding to the first range is the inlet air temperature of the third heat exchanger and the difference between the correction value of the inlet air temperature of the third heat exchanger and the first set value; The liquid pipe temperature value corresponding to the second range is one of the inlet air temperature of the third heat exchanger and the correction value of the inlet air temperature of the third heat exchanger; The liquid pipe temperature value corresponding to the third range is one of the inlet air temperature of the third heat exchanger and the sum of the correction value of the inlet air temperature of the third heat exchanger and the second set value; The first range is smaller than the second range, and the second range is smaller than the third range.

27. The air treatment device according to any one of claims 23 to 26, further comprising a detection component configured to detect the exhaust pressure of the compressor; The controller is also configured to: calculating a saturation temperature based on the exhaust pressure of the compressor; Calculating the subcooling degree of the third heat exchanger according to the saturation temperature and the liquid pipe temperature value, and calculating the target subcooling degree of the third heat exchanger according to the saturation temperature and the inlet air temperature of the third heat exchanger; The opening degree of the second regulating device is adjusted according to the subcooling degree and the target subcooling degree so that the subcooling degree of the third heat exchanger is adjusted toward the target subcooling degree.

28. The air treatment device of claim 27, wherein: During the process of adjusting the opening of the second adjusting device according to the supercooling degree and the target supercooling degree, if the controller determines that the indoor temperature is greater than or equal to the target set temperature threshold, the controller stops adjusting the opening of the second adjusting device.

29. The air treatment device according to any one of claims 22 to 28, further comprising: a third sensor configured to detect indoor humidity; as well as A second setting component is configured to set a target setting humidity; The controller is also configured to: determining a second target frequency value of the compressor according to the indoor humidity and the target set humidity; The operating frequency of the compressor is controlled according to a second target frequency value of the compressor and one of a larger value of the second target frequency value of the compressor and a temperature demand frequency of the compressor.

30. An air treatment device according to any one of claims 22 to 29, wherein: The air handling device is also configured to receive a communication protocol sent by the host computer; If it is determined that the communication protocol is the first communication protocol, then the third heat exchanger is determined to be a reheating device and the second heat exchanger is determined to be a cooling device; If it is determined that the communication protocol is the second communication protocol, then the third heat exchanger is determined to be heating, and the second heat exchanger stops working.

31. The air treatment device of claim 30, further comprising: Humidification device; a third sensor configured to detect indoor humidity; as well as A second setting component is configured to set a target setting humidity; The controller is also configured to: If it is determined that the third heat exchanger is in heating mode, the humidification amount of the humidifying device is controlled according to the indoor humidity and the target set humidity.

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