Mobile air conditioner and control method thereof

Abstract

The application provides a mobile air conditioner and a control method thereof. The mobile air conditioner comprises a shell, a refrigeration system, a first fan and an air duct. The shell is provided with an air inlet and an air outlet. The refrigeration system comprises a first heat exchanger serving as a condenser in a refrigeration mode, a compressor and a second heat exchanger. The first fan is used to make air flow into the shell through the air inlet, flow through the first heat exchanger and then flow out from the air outlet. The outer end of the air duct is connected to an outdoor environment. The mobile air conditioner is configured to have a refrigeration / heat mode in which the inner end of the air duct is connected to the air outlet, the air inlet is connected to an indoor environment and the refrigeration system is operated. The mobile air conditioner is configured to have a fresh air mode in which the inner end of the air duct is connected to the air inlet, the air outlet is connected to the indoor environment, the refrigeration system is stopped and the first fan is started. The mobile air conditioner provided by the application has a fresh air function and a simpler structure.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to a portable air conditioner and its control method. Background Technology

[0002] A portable air conditioner is an air conditioner that can be moved to a different location. It is a type of integrated air conditioner where all components of the refrigeration system, including the compressor, condenser, evaporator, and throttling element, are housed within a single casing. Air ducts are used to expel the heat exchange air from the condenser to the outdoor environment.

[0003] The unique structure of portable air conditioners limits their functionality. For example, because the entire unit is located indoors, it's difficult to design a system that allows for fresh air exchange, making it hard to meet users' growing expectations for air conditioning features. Summary of the Invention

[0004] The purpose of this invention is to at least solve one of the above-mentioned defects in the prior art and to provide a portable air conditioner that can realize the function of fresh air.

[0005] A further objective of this invention is to simplify the structure of portable air conditioners.

[0006] Another objective of this invention is to provide a control method for a portable air conditioner to improve the intelligence level of mode switching in a portable air conditioner.

[0007] On one hand, the present invention provides a portable air conditioner, which includes:

[0008] The casing has an air inlet and an air outlet;

[0009] A refrigeration system, including a first heat exchanger that acts as a condenser in refrigeration mode, a compressor, and a second heat exchanger;

[0010] A first fan is used to direct airflow through the air inlet into the housing and through the first heat exchanger, and then out through the air outlet; and

[0011] The duct connects to the outdoor environment at its outer end; the portable air conditioner is configured as follows:

[0012] It has a cooling / heating mode that connects the inner end of the duct to the air outlet, connects the air inlet to the indoor environment, and enables the refrigeration system to operate; and

[0013] It has a fresh air mode that connects the inner end of the air duct to the air inlet, so that the indoor environment of the air outlet is improved, the refrigeration system stops operating, and the first fan starts operating.

[0014] Optionally, the portable air conditioner also includes:

[0015] An inlet air filter and an outlet air filter, wherein the air permeability of the outlet air filter is lower than that of the inlet air filter; and

[0016] The portable air conditioner is further configured to: when in the cooling / heating mode, have the air inlet filter cover the air inlet; and when in the fresh air mode, have the air outlet filter cover the air outlet.

[0017] Optionally, the inlet end of the duct has an outward flange;

[0018] Two first retaining plates are provided at the air inlet, which are connected to the outer wall of the housing and define two slots facing each other to allow the outer flange, the edge of the air inlet filter and the edge of the air outlet filter to be inserted therein.

[0019] Optionally, the inlet end of the duct has an outward flange;

[0020] Two second retaining plates are provided at the air inlet, which are connected to the outer wall of the housing and define two slots facing each other to allow the outer flange, the edge of the air inlet filter and the edge of the air outlet filter to be inserted therein.

[0021] On the other hand, the present invention provides a control method for a portable air conditioner, which includes the following steps:

[0022] Check whether the air outlet filter is installed at the air outlet;

[0023] If so, determine whether the air quality parameters meet the preset conditions;

[0024] If the conditions are met, control the air conditioner to operate in the fresh air mode.

[0025] Optionally, after determining whether the air quality parameters meet preset conditions, the method further includes:

[0026] If not, a reminder will be sent to the user to check the filter installation location and confirm whether the fresh air mode needs to be turned on;

[0027] If the user indicates that they need to turn on the fresh air mode, control the air conditioner to operate the fresh air mode.

[0028] Optionally, the step of detecting whether the air outlet is equipped with the air filter includes:

[0029] Turn on the first fan;

[0030] Obtain the air velocity V1 at the air outlet;

[0031] Compare the outlet air velocity V1 with the theoretical air velocity V0 of the first fan at the current speed;

[0032] If V0-V1 falls within the preset first difference range, it is determined that the air outlet filter is installed at the air outlet; otherwise, it is determined that the air outlet filter is not installed at the air outlet.

[0033] Optionally, after comparing the outlet air velocity V1 with the theoretical air velocity V0 of the first fan at the current rotational speed, the method further includes:

[0034] If V0-V1 falls within the preset second difference range, it is determined that the air inlet filter is clogged, and the refrigeration system is controlled to stop operating.

[0035] If V0-V1 falls within the preset third difference range, then the refrigeration system is controlled to operate in the refrigeration / heating mode.

[0036] Optionally, after determining that the air inlet filter is clogged and controlling the refrigeration system to stop operating, the method further includes:

[0037] The system reminds the user to clean the air intake filter.

[0038] Confirm whether the air intake filter has been removed;

[0039] If so, check whether the air intake filter has been reinstalled. If it has been reinstalled, control the refrigeration system to run in the cooling / heating mode.

[0040] If not, control the refrigeration system to operate in the refrigeration / heating mode for a preset duration, and then return to the step of "sending a reminder to the user to clean the air intake filter".

[0041] Optionally, the first difference interval is V0-V1>m*V0;

[0042] The second difference interval is n*V0<V0-V1≤m*V0;

[0043] The third difference interval is V0-V1≤n*V0;

[0044] Where m and n are preset coefficients, and m > n.

[0045] This invention provides a portable air conditioner with a duct. When the portable air conditioner needs to operate in cooling / heating mode, the duct inlet is connected to the air outlet to blow the heat exchange air from the first heat exchanger outdoors. When the portable air conditioner needs to operate in fresh air mode, the duct inlet can be connected to the air inlet to introduce outdoor fresh air into the casing, stopping the cooling system and starting the first fan. The fresh air then flows through the casing and from the air outlet into the indoor environment, making the indoor environment fresher and healthier. This invention's portable air conditioner has a fresh air mode, meeting users' needs for fresh air function. Furthermore, this invention uses only a single duct, and the switching between cooling / heating mode and fresh air mode is achieved through switching at a single duct connection point, resulting in a very simple structure and ingenious design.

[0046] Furthermore, in the control method of the portable air conditioner of the present invention, after the user installs an air filter at the air outlet, the portable air conditioner can automatically sense this change and then control the portable air conditioner to automatically enter the preparation program of fresh air mode (detecting indoor air quality), which improves the intelligence level of the portable air conditioner mode switching and makes the user's intelligent experience better.

[0047] Furthermore, in the control method of the portable air conditioner of the present invention, the installation status of the outlet air filter can be determined by the range of V0-V1, which is a very ingenious design. Moreover, the clogging of the inlet air filter can also be detected by the range of V0-V1, so as to remind the user to clean it in a timely manner.

[0048] The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0049] The following sections will describe some specific embodiments of the invention in detail by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0050] Figure 1 This is a schematic diagram of the structure of a portable air conditioner according to an embodiment of the present invention;

[0051] Figure 2 yes Figure 1 An exploded view of the portable air conditioner shown.

[0052] Figure 3 yes Figure 2 Enlarged view of point A;

[0053] Figure 4 yes Figure 2 The diagram shows the air conditioner in cooling / heating mode.

[0054] Figure 5 yes Figure 2 The diagram shows the air conditioner in fresh air mode.

[0055] Figure 6 This is a schematic block diagram of an air conditioner according to an embodiment of the present invention;

[0056] Figure 7 This is a schematic diagram of the air conditioner control method according to the present invention;

[0057] Figure 8 This is a flowchart of an air conditioner control method according to an embodiment of the present invention. Detailed Implementation

[0058] The following reference Figures 1 to 8 This invention introduces a portable air conditioner and its control method according to embodiments of the present invention.

[0059] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of an instruction, which contains one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than those shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0060] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus or device (such as a computer-based system, a processor-included system or other system that can fetch and execute instructions from, an instruction execution system, apparatus or device).

[0061] The flowchart provided in this embodiment is not intended to indicate that the operations of the method will be performed in any particular order, or that all operations of the method are included in every case. Furthermore, the method may include additional operations. Within the scope of the technical concept provided by the method in this embodiment, additional variations can be made to the above method.

[0062] This invention provides a portable air conditioner.

[0063] Figure 1 This is a schematic diagram of the structure of a portable air conditioner according to an embodiment of the present invention; Figure 2 yes Figure 1 An exploded view of the portable air conditioner shown. Figure 3 yes Figure 2 Enlarged view of point A; Figure 4 yes Figure 2 The diagram shows the air conditioner in cooling / heating mode. Figure 5 yes Figure 2 The diagram shows the air conditioner in fresh air mode. Figure 6 This is a schematic block diagram of an air conditioner according to an embodiment of the present invention.

[0064] like Figures 1 to 6 As shown, the portable air conditioner of this embodiment generally includes a housing 10, a refrigeration system 100, a first fan 21, and an air duct 50.

[0065] The housing 10 defines a receiving space for accommodating the main components of the portable air conditioner. The housing 10 has an air inlet 14 and an air outlet 15.

[0066] The refrigeration system 100 includes a first heat exchanger 20, a compressor 60, and a second heat exchanger 30. The refrigeration system 100 also includes piping, throttling elements, a four-way valve, and other refrigeration components. Driven by the compressor 60, the refrigerant circulates within the refrigeration system 100 to achieve cooling / heating. The first heat exchanger 20 functions as a condenser in cooling mode. The second heat exchanger 30 functions as an evaporator in cooling mode. Therefore, the first heat exchanger 20 functions as an evaporator in heating mode, and the second heat exchanger 30 functions as a condenser in heating mode. The first heat exchanger 20 and the second heat exchanger 30 can be located in two mutually isolated chambers within the housing 10.

[0067] The first fan 21 is used to force airflow into the housing 10 through the air inlet 14 and through the first heat exchanger 20, and then out through the air outlet 15, so as to achieve forced convection heat exchange between the air and the first heat exchanger 20. In the cooling mode, it allows the first heat exchanger 20 (condenser) to dissipate heat.

[0068] The portable air conditioner may also include a second fan 31, which is used to match the second heat exchanger 30. The housing 10 may also have a return air inlet 11 and a supply air outlet 12. Under the action of the second fan 31, indoor air enters the housing 10 through the return air inlet 11, exchanges heat with the second heat exchanger 30, and forms a heat exchange airflow (cold air in cooling mode and hot air in heating mode). The heat exchange airflow is then blown towards the indoor environment through the supply air outlet 12, completing the cooling / heating of the indoor environment. The return air inlet 11, the air inlet 14, and the air outlet 15 may all be located on the rear wall of the housing 10, and the supply air outlet 12 may be located on the front wall of the housing 10. Figure 1 .

[0069] The outer end of the duct 50 is connected to the outdoor environment for exhausting the airflow it introduces to the outdoor environment.

[0070] The portable air conditioner is configured to have a cooling / heating mode that connects the inner end of the duct 50 to the air outlet 15, connects the air inlet 14 to the indoor environment, and operates the cooling system 100. Figure 4 At this time, indoor air enters the casing 10 through the air inlet 14, exchanges heat with the first heat exchanger 20, and then is discharged to the outdoor environment through the air outlet 15 and the air duct 50 in sequence. When the portable air conditioner is running in cooling mode, the above process cools the first heat exchanger 20; when running in heating mode, the above process heats the first heat exchanger 20.

[0071] In addition, the portable air conditioner also has a fresh air mode that connects the inner end of the duct 50 to the air inlet 14, opens the air outlet 15 to the indoor environment, stops the cooling system 100, and starts the first fan 21. Figure 5 When the refrigeration system 100 stops operating, that is, when the compressor 60 stops operating, under the action of the first fan 21, fresh outdoor air enters the casing 10 through the air duct 50 and the air inlet 14, and then blows into the indoor environment from the air outlet 15, completing the process of fresh air exchange in the indoor environment and making the indoor environment fresher and healthier.

[0072] The portable air conditioner of this invention features a fresh air mode, meeting users' needs for fresh air functionality. Furthermore, it only requires a single duct 50, and switching between cooling / heating mode and fresh air mode is achieved simply by changing the connection point of the duct 50. The structure is very simple, and the design is ingenious.

[0073] In some embodiments, such as Figures 2 to 5As shown, the portable air conditioner also includes an inlet filter 41 and an outlet filter 42. The inlet filter 41 covers the air inlet 14, and the outlet filter 42 covers the air outlet 15. The portable air conditioner is also configured such that, in cooling / heating mode, the inlet filter 41 covers the air inlet 14 to filter the indoor airflow entering the housing 10; and in fresh air mode, the outlet filter 42 covers the air outlet 15 to filter the fresh airflow exiting the housing 10.

[0074] Since the inlet air filter 41 filters indoor air with relatively few impurities, its filtration performance requirements are relatively low. The outlet air filter 42 filters fresh air introduced from the outside with relatively more impurities, so its filtration performance requirements are relatively high. Therefore, the air permeability of the outlet air filter 42 is lower than that of the inlet air filter 41, which means that the outlet air filter 42 is more compact and has better filtration performance.

[0075] Specifically, the air inlet filter 41 can be a conventional filter, and the air outlet filter 42 can be a filter that includes modules such as HEPA, silver ion, negative ion, and photocatalyst.

[0076] In some embodiments, such as Figures 2 to 5 As shown, the inlet end of the duct 50 can be formed with an outwardly flanged edge 51. Two first retaining plates 101 are provided at the air inlet 14, which are connected to the outer wall of the housing 10 and define two slots 105 with openings facing each other, allowing the outwardly flanged edge 51, the edge of the inlet filter 41, and the edge of the outlet filter 42 to be inserted therein. Two second retaining plates 102 are provided at the air inlet 14, which are connected to the outer wall of the housing 10 and define two slots 105 with openings facing each other, allowing the outwardly flanged edge 51, the edge of the inlet filter 41, and the edge of the outlet filter 42 to be inserted therein. The first retaining plates 101 and 102 can be L-shaped. The first retaining plates 101 and 102 and the housing 10 can be integrally formed. Thus, when the duct 50, inlet filter 41, or outlet filter 42 needs to be installed, it can be inserted into the slot 105. When disassembly is required, it can be pulled out.

[0077] like Figure 2 As shown, the air inlet 14 and air outlet 15 can be rectangular. Two first clamping plates 101 can extend horizontally and are respectively positioned above and below the air inlet 14. Two second clamping plates 102 can extend horizontally and are respectively positioned above and below the air outlet 15, so that the weight of the air duct 50, the air inlet filter 41 or the air outlet filter 42 can be supported by the first clamping plates 101 and the second clamping plates 102.

[0078] Another aspect of the present invention provides a mobile control method for controlling a portable air conditioner according to an embodiment of the present invention. The portable air conditioner of this embodiment includes a controller 800. The controller 800 includes a processor 810 and a memory 820. The memory 820 stores a computer program 821, which, when executed by the processor 810, is used to implement the control method of the portable air conditioner according to any embodiment of the present invention.

[0079] Figure 7 This is a schematic diagram of the air conditioner control method according to the present invention.

[0080] like Figure 7 As shown, the control method for a portable air conditioner according to an embodiment of the present invention generally includes the following steps:

[0081] Step S702: Check whether an air outlet filter 42 is installed at the air outlet 15. If it is determined that an air outlet filter is installed at the air outlet 15, proceed to step S704.

[0082] Step S704: If an air filter 42 is installed at the air outlet 15, detect the indoor air quality parameters and determine whether the air quality parameters meet the preset conditions. If they do, proceed to step S706. Specifically, the portable air conditioner includes an air quality detection device 72 to detect and control air quality parameters. When the air quality parameters indicate that the indoor air quality is sufficiently poor, outdoor fresh air needs to be introduced to purify the indoor environment, thus determining that the air quality parameters meet the preset conditions. For example, the air quality parameter detected here could be the carbon dioxide concentration. When the carbon dioxide concentration is higher than the preset concentration, it is determined that the air quality parameters meet the preset conditions.

[0083] Step S706: If the air quality parameters meet the preset conditions, control the air conditioner to operate in fresh air mode to introduce fresh outdoor air.

[0084] In the control method of this invention, after the user installs the air filter 42 at the air outlet 15, the portable air conditioner can automatically sense this change and then control the portable air conditioner to automatically enter the preparation program of fresh air mode (detecting indoor air quality parameters), eliminating the need for user control operations. This undoubtedly improves the intelligence level of portable air conditioner mode switching and makes the user's intelligent experience better.

[0085] Figure 8 This is a flowchart of an air conditioner control method according to an embodiment of the present invention.

[0086] In some embodiments, such as Figure 8 As shown, after the aforementioned step of determining whether the air quality parameters meet the preset conditions, the following steps are also included:

[0087] Step S818: If not, send a reminder to the user to check the filter installation location and confirm whether the fresh air mode needs to be turned on. That is, if the air quality is deemed acceptable and fresh air replacement is not required, the user is reminded whether the outlet filter 42 has been installed incorrectly, and is asked whether they are sure they want to turn on the fresh air mode.

[0088] Step S820: If a user instructs to activate the fresh air mode, control the air conditioner to operate in fresh air mode. Even though the previous steps determined that fresh air mode was not needed and a prompt was given to the user, if the user still wants to activate it and confirms, the user's request is satisfied, and fresh air mode is activated. Specifically, the user can be reminded to press a button on the portable air conditioner control panel, remote control, or other control terminal to confirm.

[0089] In some embodiments, such as Figure 8 As shown, the steps for detecting whether an air filter 42 is installed at the air outlet 15 include:

[0090] Step S802: Turn on the first fan 21 to make the first fan 21 run.

[0091] Step S806: Obtain the air velocity V1 at the air outlet 15. Specifically, an air velocity detection device 71 can be installed at the air outlet 15 to detect V1. It can be understood that if an air outlet filter 42 is installed at the air outlet 15, the air velocity V1 detected at that location is the air velocity downstream of the air outlet filter 42.

[0092] Step S808: Compare the outlet air velocity V1 with the theoretical air velocity V0 of the first fan 21 at the current rotational speed. For a fan, its theoretical air velocity and rotational speed have a one-to-one correspondence and can be calculated and measured. Obstructions (including the inlet filter 41 and the outlet filter 42) in the intake and exhaust air paths of the first fan 21 will cause the actual outlet air velocity V1 to be less than V0, but different obstacles have different effects on the air velocity. Therefore, it can be determined whether the outlet 15 is equipped with an outlet filter 42 by judging the range of V0-V1.

[0093] Step S810: If V0-V1 falls within the preset first difference range, it is determined that an air outlet filter 42 is installed at the air outlet 15; otherwise, it is determined that an air outlet filter 42 is not installed at the air outlet 15.

[0094] Furthermore, after comparing the wind speed V1 with the theoretical wind speed V0 of the first fan 21 at the current rotational speed, the process also includes:

[0095] Step S822: If V0-V1 falls within the preset second difference range, then the air inlet filter 41 is determined to be clogged, and the cooling system 100 is controlled to stop operating. That is, if V0-V1 falls within the second difference range, not the first difference range, it means that the air outlet filter 42 is not installed, but the air velocity difference is still too large, indicating that the air inlet filter 41 may be clogged.

[0096] Step S838: If V0-V1 falls within the preset third difference range, then control the refrigeration system 100 to operate in cooling / heating mode. That is, if the wind speed difference is small and the air inlet filter 41 is not severely clogged, the cooling / heating mode can be operated normally.

[0097] It is understandable that, among the three difference intervals mentioned above, the right endpoint of the third difference interval is equal to the left endpoint of the second difference interval, and the right endpoint of the second difference interval is equal to the left endpoint of the first interpolation interval.

[0098] Specifically, in this step, the first difference interval can be V0-V1>m*V0, the second difference interval is n*V0<V0-V1≤m*V0, and the third difference interval is V0-V1≤n*V0, where m and n are preset coefficients and m>n. Using air outlet filters 42 with different ventilation performance will inevitably result in different values ​​of m, so m can be determined experimentally. Similarly, the value of n can be calculated by testing the wind speed difference under the maximum permissible clogging condition.

[0099] In the control method of the portable air conditioner of this invention, the installation status of the outlet air filter 42 can be determined by the range of V0-V1, which is a very ingenious design. Furthermore, the cloggedness of the inlet air filter 41 can also be detected by the range of V0-V1, so as to remind the user to clean it in a timely manner.

[0100] In some embodiments, such as Figure 8 As shown, after the step of stopping the operation of the refrigeration system 100, the following steps are also included:

[0101] Step S826: Remind the user to clean the air intake filter 41.

[0102] Step S828: Confirm whether the air inlet filter 41 has been removed. If yes, proceed to step S830; if no, proceed to step S836.

[0103] Step S830: Since it was determined in the previous steps that the air intake filter 41 was removed, this step confirms whether the air intake filter 41 has been reinstalled. If so, it is inferred that the air intake filter 41 has been cleaned, so step S832 is executed: the refrigeration system 100 is controlled to operate in cooling / heating mode. An electromagnetic induction element can be installed on the housing 10 to detect whether the air intake filter 41 has been removed and installed.

[0104] Step S836: Control the refrigeration system 100 to run in cooling / heating mode for a preset duration, and then return to execute step S826, namely, the step of "sending a reminder to the user to clean the air intake filter 41".

[0105] In some alternative embodiments, the air conditioner can achieve higher technical effects through further optimization and configuration of the above steps. The following describes the air conditioner control method of this embodiment in detail with reference to an alternative execution flow of this embodiment. This embodiment is only an example of the execution flow. In specific implementation, the execution order and operating conditions of some steps can be modified according to specific implementation requirements.

[0106] like Figure 8 As shown, in a preferred embodiment of the present invention, the air conditioner control method sequentially performs the following steps:

[0107] Step S802: Turn on the first fan 21 to make the first fan 21 run.

[0108] Step S806: Obtain the air velocity V1 at the air outlet 15. Specifically, an air velocity detection device 71 can be installed at the air outlet 15 to detect V1.

[0109] Step S808: Compare the output air velocity V1 with the theoretical air velocity V0 of the first fan 21 at the current speed. If V0-V1 falls within the first difference range, proceed to step S810. If V0-V1 falls within the second difference range, proceed to step S822: Determine if the inlet filter 41 is clogged, and control the refrigeration system 100 to stop operating. If V0-V1 falls within the third difference range, proceed to step S838: Control the refrigeration system 100 to operate in cooling / heating mode.

[0110] Step S810: If V0-V1 falls within the preset first difference range, it is determined that an air outlet filter 42 is installed at the air outlet 15; otherwise, it is determined that an air outlet filter 42 is not installed at the air outlet 15.

[0111] Step S812: Detect the air quality parameters of the indoor environment and determine whether the air quality parameters meet the preset conditions. If they do, proceed to step S816; if they do not, proceed to step S818.

[0112] Step S816: Run the fresh air mode.

[0113] Step S818: Send a reminder to the user to check the filter installation location and confirm whether the fresh air mode needs to be turned on, and then proceed to step S820.

[0114] Step S820: If an instruction is received from the user that the fresh air mode needs to be turned on, control the air conditioner to operate in the fresh air mode.

[0115] Step S826: This step is performed after step S822. Specifically, a reminder is sent to the user to clean the air intake filter 41.

[0116] Step S828: Confirm whether the air inlet filter 41 has been removed. If yes, proceed to step S830; if no, proceed to step S836.

[0117] Step S830: Since it was determined in the previous steps that the air intake filter 41 was removed, this step confirms whether the air intake filter 41 has been reinstalled. If so, proceed to step S832: Control the refrigeration system 100 to operate in cooling / heating mode.

[0118] Step S836: Control the refrigeration system 100 to run in cooling / heating mode for a preset duration, and then return to execute step S826, namely, the step of "sending a reminder to the user to clean the air intake filter 41".

[0119] Therefore, those skilled in the art should recognize that although numerous exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Thus, the scope of the present invention should be understood and construed as covering all such other variations or modifications.

Claims

1. A portable air conditioner, comprising: The casing has an air inlet and an air outlet; A refrigeration system, including a first heat exchanger that acts as a condenser in refrigeration mode, a compressor, and a second heat exchanger; A first fan is used to drive airflow through the air inlet into the housing and through the first heat exchanger, and then out from the air outlet; as well as The duct connects to the outdoor environment at its outer end; the portable air conditioner is configured as follows: It has a cooling / heating mode that connects the inner end of the duct to the air outlet, connects the air inlet to the indoor environment, and enables the refrigeration system to operate; and It has a fresh air mode that connects the inner end of the air duct to the air inlet, connects the air outlet to the indoor environment, stops the refrigeration system and starts the first fan. An inlet air filter and an outlet air filter, wherein the air permeability of the outlet air filter is lower than that of the inlet air filter; and The portable air conditioner is further configured to: when in the cooling / heating mode, have the air inlet filter cover the air inlet; and when in the fresh air mode, have the air outlet filter cover the air outlet; wherein... The inlet end of the air duct has an outward flange; Two first retaining plates are provided at the air inlet, which are connected to the outer wall of the housing and define two slots facing each other to allow the outer flange, the edge of the air inlet filter and the edge of the air outlet filter to be inserted therein.

2. The portable air conditioner according to claim 1, wherein... The inlet end of the air duct has an outward flange; Two second retaining plates are provided at the air inlet, which are connected to the outer wall of the housing and define two slots facing each other to allow the outer flange, the edge of the air inlet filter and the edge of the air outlet filter to be inserted therein.

3. A control method for a portable air conditioner, used to control the portable air conditioner as described in any one of claims 1 to 2, comprising the following steps: Check whether the air outlet filter is installed at the air outlet; If so, detect the air quality parameters of the indoor environment and determine whether the air quality parameters meet the preset conditions; If the conditions are met, control the air conditioner to operate in the fresh air mode.

4. The control method according to claim 3, wherein after the step of determining whether the air quality parameter meets the preset conditions, it further includes: If not, a reminder will be sent to the user to check the filter installation location and confirm whether the fresh air mode needs to be turned on; If the user indicates that they need to turn on the fresh air mode, control the air conditioner to operate the fresh air mode.

5. The control method according to claim 3, wherein, The steps for detecting whether the air outlet is equipped with the air filter include: Turn on the first fan; Obtain the air velocity V1 at the air outlet; Compare the outlet air velocity V1 with the theoretical air velocity V0 of the first fan at the current speed; If V0-V1 falls within the preset first difference range, it is determined that the air outlet filter is installed at the air outlet; otherwise, it is determined that the air outlet filter is not installed at the air outlet.

6. The control method according to claim 5, wherein, After comparing the outlet air velocity V1 with the theoretical air velocity V0 of the first fan at the current speed, the method further includes: If V0-V1 falls within the preset second difference range, it is determined that the air inlet filter is clogged, and the refrigeration system is controlled to stop operating. If V0-V1 falls within the preset third difference range, then the refrigeration system is controlled to operate in the refrigeration / heating mode.

7. The control method according to claim 6, wherein after the step of determining that the air inlet filter is clogged and controlling the refrigeration system to stop operating, it further includes: The system reminds the user to clean the air intake filter. Confirm whether the air intake filter has been removed; If so, check whether the air intake filter has been reinstalled. If it has been reinstalled, control the refrigeration system to run in the cooling / heating mode. If not, control the refrigeration system to operate in the refrigeration / heating mode for a preset duration, and then return to the step of "sending a reminder to the user to clean the air intake filter".

8. The control method according to claim 7, wherein The first difference interval is V0-V1>m*V0; The second difference interval is n*V0<V0-V1≤m*V0; The third difference interval is V0-V1≤n*V0; Where m and n are preset coefficients, and m > n.

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