Mobile air conditioner and control method thereof

Abstract

The application discloses a kind of mobile air conditioner and control method, the mobile air conditioner, comprising: shell, indoor fan, outdoor fan and compressor, the shell has indoor side air duct and outdoor side air duct;The indoor fan is arranged in the indoor side air duct, the outdoor fan is arranged in the outdoor side air duct, the compressor is arranged in the shell, and the diameter of the wind wheel of the indoor fan is different from the diameter of the wind wheel of the outdoor fan. Thus, by making the diameter of the wind wheel of the indoor fan different from the diameter of the wind wheel of the outdoor fan, the natural frequency of the indoor fan and the natural frequency of the outdoor fan can be different, to avoid structural resonance of the indoor fan and the outdoor fan, and also to reduce the probability that the operating frequency of the indoor fan and the outdoor fan is the same or approximately the same, to reduce the probability of beat vibration phenomenon, and to effectively improve the working stability and user experience of the mobile air conditioner.

Description

Technical Field

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

[0002] To regulate indoor temperature comfort, wall-mounted air conditioners can be installed. However, wall-mounted air conditioners can only regulate the temperature of the corresponding room, making it difficult to switch between multiple rooms. They are also more difficult to install themselves, and cannot meet the needs of renters.

[0003] Based on this, portable air conditioners have been further developed in related technologies. Since the outdoor and indoor sides of portable air conditioners are set up as a single unit, the indoor fan, outdoor fan and compressor all become vibration excitation sources during operation, resulting in flapping vibration problems and structural resonance. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of this invention is to provide a portable air conditioner that has a lower probability of flapping vibration and structural resonance, resulting in a better user experience.

[0005] The present invention further proposes a control method for the aforementioned portable air conditioner.

[0006] According to a first aspect of the present invention, a portable air conditioner includes: a housing, an indoor fan, an outdoor fan, and a compressor. The housing has an indoor side air duct and an outdoor side air duct. The indoor fan is disposed in the indoor side air duct, the outdoor fan is disposed in the outdoor side air duct, and the compressor is disposed in the housing. The impeller diameter of the indoor fan is different from that of the outdoor fan.

[0007] According to embodiments of the present invention, by making the impeller diameter of the indoor fan different from that of the outdoor fan, the natural frequency of the indoor fan can be different from that of the outdoor fan, thereby avoiding structural resonance between the indoor and outdoor fans. It can also reduce the probability that the operating frequencies of the indoor and outdoor fans are the same or approximately the same, thereby reducing the probability of flapping phenomenon and effectively improving the working stability and user experience of the portable air conditioner.

[0008] According to some embodiments of the present invention, the diameter of the impeller of the indoor fan is smaller than the diameter of the impeller of the outdoor fan.

[0009] In some embodiments, the axial height of the impeller of the indoor fan is different from the axial height of the impeller of the outdoor fan.

[0010] Furthermore, the axial height of the impeller of the indoor fan is less than the axial height of the impeller of the outdoor fan.

[0011] According to some embodiments of the present invention, the projection of the indoor side air duct onto the axial direction of the indoor fan is a centrally symmetrical figure.

[0012] In some embodiments, both the outdoor side air duct and the indoor side air duct are constructed as cross-flow air ducts.

[0013] According to some embodiments of the present invention, buffer components are provided between the indoor fan and the indoor side air duct, the outdoor fan and the outdoor side air duct, and the compressor and the housing.

[0014] In some embodiments, the portable air conditioner further includes a controller, which is electrically connected to the indoor fan, the outdoor fan, and the compressor, and is adapted to adjust the operating frequency of the compressor, the speed of the indoor fan, and the speed of the outdoor fan.

[0015] According to some embodiments of the present invention, the portable air conditioner further includes: a plurality of casters, the casters being disposed on the housing.

[0016] Furthermore, at least one pair of the said movable wheels is constructed as omnidirectional wheels.

[0017] A control method for a portable air conditioner according to a second aspect of the present invention includes: acquiring the operating frequency of a compressor and the rotational speed of an outdoor fan; determining the outdoor fan frequency based on the outdoor fan rotational speed; and adjusting the operating frequency of the compressor if the absolute value of the difference between the outdoor fan frequency and n times the operating frequency of the compressor is less than a frequency doubling interval point; wherein the frequency doubling interval point is 5 Hz and n is a positive integer.

[0018] According to some embodiments of the present invention, the operating frequency of the compressor is adjusted by increasing the frequency by 1 Hz each time until the absolute value of the difference between the outdoor fan frequency and n times the operating frequency of the compressor is greater than or equal to the octave interval point.

[0019] Furthermore, the control method further includes: if the absolute value of the difference between the outdoor fan frequency and n times the operating frequency of the compressor is greater than or equal to the octave interval point, then the indoor fan speed is obtained; the indoor fan frequency is determined based on the indoor fan speed; if the absolute value of the difference between the outdoor fan frequency and m times the indoor fan frequency is less than the octave interval point, then the indoor fan speed is adjusted, where m is a positive integer.

[0020] Furthermore, the indoor fan speed is adjusted as follows: the speed is increased by 5 rpm / min each time until the absolute value of the difference between the outdoor fan frequency and n times the indoor fan frequency is greater than or equal to the octave interval point.

[0021] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is a schematic diagram of a portable air conditioner from one angle according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of a portable air conditioner from another angle according to an embodiment of the present invention;

[0025] Figure 3 This is a rear view of a portable air conditioner according to an embodiment of the present invention;

[0026] Figure 4 yes Figure 3 Schematic cross-sectional view of midline AA;

[0027] Figure 5 This is a flowchart of a control method according to an embodiment of the present invention.

[0028] Figure label:

[0029] Portable air conditioner 100

[0030] 10 housing, 11 indoor air duct, 12 outdoor air duct

[0031] Indoor fan 20, outdoor fan 30, compressor 40. Detailed Implementation

[0032] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0033] First, it should be noted that when two or more simple harmonic waveforms with the same, similar, nearly the same, or nearly similar (the product of an integer multiple of the amplitude of one vibration and another) and very similar frequencies are superimposed, the amplitude of the composite waveform will change slowly and periodically over time. This phenomenon of superimposed simple harmonic waveforms is called beat vibration, which will cause abnormal vibration in the equipment that exhibits beat vibration, affecting the user experience.

[0034] In the existing technology, with the gradual expansion of the rental population and the need to adjust the temperature of the room when people move between multiple rooms in their daily lives, portable air conditioners 100 have emerged. However, the indoor fan 20, outdoor fan 30, and compressor 40 of the portable air conditioner 100 are all set in the same housing 10. The housing 10 contains three vibration excitation sources, which are coupled with each other. The probability of beat vibration due to the superposition of simple harmonic waves is relatively high, which will cause abnormal vibration of the portable air conditioner 100 and affect the user experience. When the natural frequencies of the indoor fan 20 and the outdoor fan 30 are the same, structural resonance will occur, which will also cause abnormal vibration of the equipment and affect the user experience.

[0035] Based on this, the present invention proposes a portable air conditioner 100 and a control method, which avoids structural resonance between the indoor fan 20 and the outdoor fan 30 from a structural perspective, and effectively reduces the probability of flapping phenomenon in the portable air conditioner 100 from the perspectives of structure and frequency control (control method), thereby improving the user experience of the indoor air conditioner.

[0036] The following is for reference. Figures 1-5 A portable air conditioner 100 and its control method are described according to an embodiment of the present invention.

[0037] like Figure 1 , Figure 2 and Figure 3 As shown, a portable air conditioner 100 according to a first aspect embodiment of the present invention includes: a housing 10, an indoor fan 20, an outdoor fan 30, and a compressor 40.

[0038] Reference Figure 4 As shown, the housing 10 has an indoor air duct 11 and an outdoor air duct 12. Both the indoor air duct 11 and the outdoor air duct 12 are connected to the indoor space (which can be the same room or two adjacent rooms). The air outlet of the indoor air duct 11 faces the area where the user is located, while the air outlet of the outdoor air duct 12 faces away from the area where the user is located. This is to achieve temperature adjustment for the area where the user is located while avoiding the air outlet temperature of the indoor air duct 11 being affected by the air outlet temperature of the outdoor air duct 12, thereby improving the temperature adjustment experience of the portable air conditioner 100.

[0039] like Figure 2 and Figure 3 As shown, the indoor fan 20 is installed in the indoor side air duct 11. The indoor fan 20 rotates to drive the airflow in the indoor space to exchange heat with the first heat exchanger, and then the airflow is directed to the user's area (the area where temperature adjustment is required). The outdoor fan 30 is installed in the outdoor side air duct 12. The outdoor fan 30 rotates to drive the airflow in the indoor space to exchange heat with the second heat exchanger, and then the airflow is directed to the area away from the user, so as to achieve temperature adjustment of the area where temperature adjustment is required.

[0040] The compressor 40 is installed inside the housing 10. The compressor 40 is connected to the first heat exchanger and the second heat exchanger to define the refrigerant flow pipeline. The first heat exchanger is constructed as a condenser and the second heat exchanger is constructed as an evaporator.

[0041] It should be noted that the natural frequency is also called the natural frequency. When an object undergoes free vibration, its displacement changes with time according to a sine or cosine law. The frequency of the vibration is independent of the initial conditions, but only depends on the inherent characteristics of the system (i.e., indoor fan 20 and outdoor fan 30) (such as mass, shape, material, etc.), and is called the natural frequency. Its corresponding period is called the natural period. The study of the natural frequency is helpful in ensuring product stability.

[0042] When an object undergoes free vibration, its displacement changes sinusoidally with time; this is called simple harmonic motion. The amplitude and initial phase of simple harmonic motion depend on the initial conditions of the vibration, while the period or frequency is independent of the initial conditions but depends on the inherent characteristics of the system, called the natural frequency or natural period. The frequency of an object is related to its hardness, mass, and dimensions. When it deforms, elastic forces restore its original shape. Elastic forces are mainly related to size and hardness, while mass affects acceleration. For the same shape, higher hardness results in higher frequencies, and greater mass results in lower frequencies. The frequency of a system is determined by its mass distribution, internal elasticity, and other mechanical properties.

[0043] Therefore, the present invention makes the impeller diameter of the indoor fan 20 different from that of the outdoor fan 30, so that the natural frequencies of the indoor fan 20 and the outdoor fan 30 are different, which can avoid structural resonance between the indoor fan 20 and the outdoor fan 30, thereby improving the working stability of the portable air conditioner 100 and the user experience.

[0044] According to an embodiment of the present invention, the portable air conditioner 100, by making the impeller diameter of the indoor fan 20 different from that of the outdoor fan 30, can make the natural frequency of the indoor fan 20 different from that of the outdoor fan 30, thereby avoiding structural resonance between the indoor fan 20 and the outdoor fan 30. It can also reduce the probability that the operating frequencies of the indoor fan 20 and the outdoor fan 30 are the same or approximately the same, thereby reducing the probability of flapping phenomenon and effectively improving the working stability and user experience of the portable air conditioner 100.

[0045] It is understandable that the difference in diameter between the indoor fan 20 and the outdoor fan 30 means that in some embodiments, the impeller diameter of the indoor fan 20 is smaller than that of the outdoor fan 30; in other embodiments, the impeller diameter of the indoor fan 20 is larger than that of the outdoor fan 30. Both of these can effectively separate the natural frequencies of the indoor fan 20 and the outdoor fan 30, reducing the probability of structural resonance.

[0046] Preferably, the diameter of the impeller of the indoor fan 20 is smaller than that of the impeller of the outdoor fan 30, and the air flow in the outdoor side duct 12 is greater than that in the indoor side duct 11. This can improve the heat exchange effect of the outdoor side duct 12 and make the airflow out of the outdoor side duct 12 more uniform. It can also reduce the impact of the airflow out of the outdoor side duct 12 on the area that needs temperature adjustment and improve the user experience.

[0047] It should be noted that the impeller diameter of the indoor fan 20 is different from that of the outdoor fan 30. The diameter of the area of ​​the indoor side air duct 11 that houses the impeller of the indoor fan 20 is also different from that of the area of ​​the outdoor side air duct 12 that houses the impeller of the outdoor fan 30. This can also prevent structural resonance between the solid parts of the indoor side air duct 11 and the outdoor side air duct 12 (which can be defined by the housing 10 or installed on the housing 10 after processing), further improving the user experience and working stability of the portable air conditioner 100.

[0048] Furthermore, in order to further separate the natural frequency of the indoor fan 20 from the natural frequency of the outdoor fan 30, the present invention further makes the axial height of the impeller of the indoor fan 20 different from the axial height of the impeller of the outdoor fan 30.

[0049] It is understandable that the frequency of an object is related to its hardness, mass, and size. The geometric dimensions of the impeller of the indoor fan 20 and the impeller of the outdoor fan 30 include the impeller diameter and the axial height of the impeller. By making the impeller diameter of the indoor fan 20 different, and further making the axial height of the impeller of the indoor fan 20 different from that of the impeller of the outdoor fan 30, it can be ensured that the natural frequency of the indoor fan 20 is different from that of the outdoor fan 30.

[0050] It should be noted that the difference between the axial height of the impeller of the indoor fan 20 and the axial height of the impeller of the outdoor fan 30 means that in some embodiments, the axial height of the impeller of the indoor fan 20 is less than that of the impeller of the outdoor fan 30; in other embodiments, the axial height of the impeller of the indoor fan 20 is greater than that of the impeller of the outdoor fan 30. Both of these can result in the natural frequency of the indoor fan 20 being different from that of the outdoor fan 30.

[0051] The natural frequency of the indoor fan 20 is different from that of the outdoor fan 30, which can be achieved by making the impeller diameter of the indoor fan 20 different from that of the outdoor fan 30 and / or making the axial height of the impeller of the indoor fan 20 different from that of the outdoor fan 30.

[0052] Preferably, the axial height of the impeller of the indoor fan 20 is less than the axial height of the impeller of the outdoor fan 30. The height of the area of ​​the indoor side air duct 11 that houses the impeller of the indoor fan 20 can be less than the height of the area of ​​the outdoor side air duct 12 that houses the impeller of the outdoor fan 30, so as to improve the heat exchange efficiency of the outdoor side air duct 12, improve the operating sound quality of the portable air conditioner 100, and enhance the user experience.

[0053] According to some embodiments of the present invention, the projection of the indoor side air duct 11 onto the axial direction of the indoor fan 20 is a centrally symmetrical figure, and both the outdoor side air duct 12 and the indoor side air duct 11 are constructed as cross-flow air ducts, and both the indoor fan 20 and the outdoor fan 30 are formed as cross-flow fans.

[0054] Specifically, the projection of the indoor side air duct 11 onto the axial direction of the indoor fan 20 forms a centrally symmetrical shape. That is, rotating the projection of the indoor side air duct 11 around a certain point by 180° allows the rotated shape to coincide with the original shape, which can improve the uniformity of airflow from the indoor side air duct 11 and improve the user experience. Furthermore, this invention further forms both the indoor side air duct 11 and the outdoor side air duct 12 as cross-flow air ducts, corresponding to the indoor fan 20 and the outdoor fan 30 as cross-flow fans. This allows the circumferential length of the impellers of the indoor fan 20 and the outdoor fan 30 to be unrestricted and arbitrarily selected according to usage requirements. The airflow flows through the impeller and receives two forces from the impeller blades, allowing the airflow discharged from both the indoor side air duct 11 and the outdoor side air duct 12 to reach a greater distance, which can also improve the uniformity of airflow.

[0055] More importantly, cross-flow fans operate without turbulence, which can effectively improve the uniformity of airflow and enhance the user experience.

[0056] According to some embodiments of the present invention, buffer components are provided between the indoor fan 20 and the indoor side air duct 11, the outdoor fan 30 and the outdoor side air duct 12, and the compressor 40 and the housing 10.

[0057] Specifically, the indoor fan 20 is fixed inside the indoor side air duct 11, and the outdoor fan 30 is fixed inside the outdoor side air duct 12. A buffer is provided between the motor part of the indoor fan 20 and the indoor side air duct 11, a buffer is provided between the motor part of the outdoor fan 30 and the indoor side air duct 11, and a buffer is provided between the compressor 40 and the housing 10. This can further reduce the probability of structural vibration caused by multiple vibration excitation sources inside the housing 10 of the portable air conditioner 100, improve the working stability of the portable air conditioner 100, reduce the working noise of the portable air conditioner 100, and improve the user experience.

[0058] In some embodiments, the portable air conditioner 100 further includes a controller, which is electrically connected to the indoor fan 20, the outdoor fan 30 and the compressor 40, and is adapted to adjust the operating frequency of the compressor 40, the speed of the indoor fan 20 and the speed of the outdoor fan 30.

[0059] Specifically, in order to further reduce the probability of vibration occurring in the indoor fan 20, outdoor fan 30, and compressor 40, the present invention further provides a controller. The controller is located inside the housing 10. The controller can adjust the operating frequency of the compressor 40, the speed of the indoor fan 20, and the speed of the outdoor fan 30. Adjusting the speed of the indoor fan 20 corresponds to adjusting the frequency of the indoor fan 20, and adjusting the speed of the outdoor fan 30 corresponds to adjusting the frequency of the outdoor fan 30, so as to avoid the indoor fan 20 frequency, outdoor fan 30 frequency, and compressor 40 operating frequencies being the same or nearly the same, thereby reducing the probability of vibration.

[0060] According to some embodiments of the present invention, the portable air conditioner 100 further includes: a plurality of casters disposed on the housing 10; and at least one pair of casters is configured as omnidirectional wheels.

[0061] Specifically, the portable air conditioner 100 can be moved between multiple rooms. To improve the ease of movement of the portable air conditioner 100, casters can be provided at the bottom of the housing 10. Depending on the volume and geometry of the housing 10, three or four casters can be provided. For example, in an embodiment where the projection of the housing 10 in the height direction is circular, three casters can be provided at the bottom of the housing 10, one of which is a swivel wheel. In an embodiment where the projection in the height direction is rectangular, four casters can be provided at the bottom of the housing 10, two of which are swivel wheels, to make the movement and transport of the portable air conditioner 100 more convenient.

[0062] like Figure 5 As shown, the control method of the portable air conditioner 100 according to a second aspect embodiment of the present invention includes:

[0063] Obtain the operating frequency of compressor 40 and the speed of outdoor fan 30;

[0064] The frequency of the outdoor fan 30 is determined based on the outdoor fan speed 30.

[0065] If the absolute value of the difference between the frequency of the outdoor fan 30 and the operating frequency of the compressor 40 (which is n times the operating frequency) is less than the doubling interval point, then the operating frequency of the compressor 40 is adjusted; where the doubling interval point is 5 Hz and n is a positive integer.

[0066] Specifically, by separating the compression frequency of the compressor 40, the indoor unit frequency, and the outdoor unit frequency, the probability of flapping vibration between the three vibration excitation sources of the portable air conditioner 100 can be reduced.

[0067] Based on this, the present invention proposes a control method, which first obtains the operating frequency of the compressor 40 and the rotation speed of the outdoor fan 30, and then determines the frequency of the outdoor fan 30 based on the rotation speed of the outdoor fan 30.

[0068] Among them, the operating frequency F of outdoor fan 30 out =60*A 室外 / W out A 室外 For the number of blades in an outdoor fan of 30, W out For an outdoor fan speed of 30, F out This refers to the operating frequency of the outdoor fan 30 (i.e., the frequency of the outdoor fan 30).

[0069] In this way, the operating frequency of the outdoor fan 30 can be determined by its rotational speed. Then, the absolute value of the difference between the outdoor fan 30 frequency and n times the operating frequency of the compressor 40 can be compared to see if it is less than a multiple of the frequency range point, i.e., the operating frequency of the compressor 40 |F out -nF c1 |<5hz, where nF c1 F is the dot product of the operating frequencies of compressor 40. C1 F is the current operating frequency of compressor 40. C2 This refers to the adjusted operating frequency of compressor 40.

[0070] If |F out -nF c1 If | < 5 Hz, it means that the absolute value of the difference between the integer multiples of the product of one vibration amplitude (outdoor fan 30) and another vibration amplitude (compressor 40) is less than the octave interval point. When the two vibration amplitudes satisfy the above relationship, it can be considered that the operating frequency of the equipment corresponding to the two vibration amplitudes is within the beat vibration interval, and beat vibration is likely to occur.

[0071] Based on this, the control method of the present invention determines whether the numerical relationship between the operating frequency of the compressor 40 and the frequency of the outdoor fan 30 is within the octave interval based on the obtained operating frequency of the compressor 40 and the converted frequency of the outdoor fan 30. When the operating frequency of the compressor 40 and the frequency of the outdoor fan 30 are within the octave interval, the operating frequency of the compressor 40 is adjusted so that the absolute value of the difference between the product of the frequency of the outdoor fan 30 and the integer multiple of the adjusted operating frequency of the compressor 40 is greater than the octave interval (5Hz), so as to avoid the vibration phenomenon between the compressor 40 and the outdoor fan 30.

[0072] The control method of the portable air conditioner 100 according to an embodiment of the present invention is based on |F out -nF c1 If the frequency is less than 5Hz, the operating frequency of the compressor 40 is adjusted to ensure that the absolute value of the difference between the product of the frequency of the outdoor fan 30 and the operating frequency of the compressor 40 (which are integer multiples of each other) is outside the multiple range. This is to avoid the vibration amplitude (operating frequency) of the compressor 40 being the same, similar, approximately the same, or approximately similar to the vibration amplitude (frequency) of the outdoor fan 30, thereby effectively preventing the outdoor fan 30 and the compressor 40 from vibrating together and improving the user experience of the portable air conditioner 100.

[0073] like Figure 5 As shown, according to some embodiments of the present invention, the operating frequency of the compressor 40 is adjusted as follows: the frequency is increased by 1 Hz each time until the absolute value of the difference between the frequency of the outdoor fan 30 and n times the operating frequency of the compressor 40 is greater than or equal to the point of the frequency doubling interval.

[0074] Since the outdoor fan speed 30 and the compressor 40 operating frequency have a significant impact on the temperature regulation capability of the portable air conditioner 100, and the outdoor fan speed 30 is approximately 1400 rpm / min, while the adjustment coefficient of the compressor 40 operating frequency is approximately 5 (i.e., n≥5) or higher, adjusting the compressor 40 operating frequency has a relatively small impact on the overall temperature regulation capability of the portable air conditioner 100. Therefore, the compressor 40 operating frequency is adjusted first, gradually increasing by 1 Hz each time, until |F out -nF c1 | <5 Hz, even if the adjusted operating frequency of compressor 40 and outdoor fan 30 satisfy the above relationship, in order to avoid the occurrence of beat vibration.

[0075] Understandably, after reducing the probability of vibration between compressor 40 and outdoor fan 30, the speed of indoor fan 20 can be further adjusted to reduce the probability of vibration between indoor fan 20 and outdoor fan 30, and between indoor fan 20 and compressor 40, as follows:

[0076] Furthermore, the control methods also include:

[0077] If the absolute value of the difference between the outdoor fan frequency 30 and the operating frequency of the compressor 40 (n times the operating frequency) is greater than or equal to the point of the multiple frequency interval, then the speed of the indoor fan 20 is obtained.

[0078] The frequency of indoor fan 20 is determined based on the speed of indoor fan 20.

[0079] If the absolute value of the difference between the frequency of the outdoor fan 30 and the frequency of the indoor fan 20 (which is m times the frequency) is less than the point of the frequency range, then adjust the speed of the indoor fan 20, where m is a positive integer.

[0080] Based on this, the present invention further adjusts the speed of the indoor fan 20 to adjust the frequency of the indoor fan 20, thereby achieving the technical effect of avoiding the vibration phenomenon between the indoor fan 20 and the outdoor fan 30, and between the indoor fan 20 and the compressor 40.

[0081] Among them, the operating frequency F of the indoor fan 20 in 60*A 室内 / W in A 室内 For the number of blades in the indoor fan 20, W in F is the rotational speed of the indoor fan 20. in This refers to the operating frequency of the indoor fan 20 (i.e., the frequency of the indoor fan 20).

[0082] Then compare whether the absolute value of the difference between the outdoor fan frequency 30 and the indoor fan frequency 20 (which is m times the outdoor fan frequency) is less than the octave interval point, i.e., the operating frequency |F of the compressor 40. out -mF in |<5hz, where mF in W is the product of the frequencies of 20 indoor fans. in1 For the current indoor fan frequency of 20, W in2 The frequency of the indoor fan is adjusted to 20.

[0083] Therefore, by calculating the frequency of the outdoor fan 30 and the frequency of the indoor fan 20, it is determined whether the numerical relationship between the frequencies of the indoor fan 20 and the outdoor fan 30 is within the octave interval. When the frequencies of the indoor fan 20 and the outdoor fan 30 are within the octave interval, the speed of the indoor fan 20 is adjusted (i.e., the frequency of the indoor fan 20 is adjusted by adjusting the speed of the indoor fan 20) so that the absolute value of the difference between the product of the integer multiples of the outdoor fan 30 frequency and the adjusted indoor fan 20 frequency is greater than the octave interval (5Hz), so as to avoid the vibration phenomenon between the indoor fan 20 and the outdoor fan 30, and between the indoor fan 20 and the compressor 40.

[0084] It is understandable that the speeds of both the indoor fan 20 and the outdoor fan 30 are around 1400 rpm / min, so the coefficient m is 1. Therefore, the speed of the indoor fan 20 can be adjusted by increasing the speed by 5 rpm / min each time until the absolute value of the difference between the frequency of the outdoor fan 30 and the frequency of the indoor fan 20 (m times the frequency of the outdoor fan 30) is greater than or equal to the octave interval. This makes the adjustment of the speed of the indoor fan 20 more reasonable. Under the premise of reducing the impact on the temperature adjustment capability of the portable air conditioner 100, adjusting the speed of the indoor fan 20 effectively reduces the probability of flapping vibration among the three vibration excitation sources: the indoor fan 20, the outdoor fan 30, and the compressor 40.

[0085] It is understood that the control method of the portable air conditioner 100 of the present invention is not limited to this. Assuming that the operating frequency of the compressor 40 is a, the frequency of the outdoor fan 30 is b, and the frequency of the indoor fan 20 is c, the quantitative relationship of a, b, and c can be made to be outside the frequency range.

[0086] For example, you can first compare compressor 40 with outdoor fan 30, adjust compressor 40, and then compare indoor fan 20 with outdoor fan 30; or you can first compare indoor fan 20 with compressor 40, adjust compressor 40, and then compare indoor fan 20 with outdoor fan 30; or you can first compare indoor fan 20 with outdoor fan 30, adjust indoor fan 20, and then compare outdoor fan 30 with compressor 40. The comparison and adjustment of the three can be determined by permutation and combination. In the two comparisons, the object to be compared is the unadjusted value, not the adjusted value, until the quantitative relationship of the three vibration amplitudes is outside the octave range.

[0087] For example: The control method of the present invention may also be:

[0088] Obtain the operating frequency of compressor 40 and the speed of indoor fan 20;

[0089] The frequency of indoor fan 20 is determined based on the speed of indoor fan 20.

[0090] If the absolute value of the difference between the frequency of indoor fan 20 and the operating frequency of compressor 40 (x times the operating frequency) is less than the point of the multiple frequency interval, then adjust the operating frequency of compressor 40; where...

[0091] The frequency doubling interval is 5 Hz, and x is a positive integer.

[0092] If the absolute value of the difference between the indoor fan frequency 20 and the operating frequency of the compressor 40 (x times the operating frequency) is greater than or equal to the point of the multiple frequency interval, then the outdoor fan speed 30 is obtained.

[0093] The frequency of the outdoor fan 30 is determined based on the outdoor fan speed 30.

[0094] If the absolute value of the difference between the frequency of indoor fan 20 and the frequency of outdoor fan 30 (which is y times the frequency) is less than the point of the frequency range, then adjust the speed of outdoor fan 30, where y is a positive integer.

[0095] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0096] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0097] In the description of this invention, "a plurality of" means two or more.

[0098] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0099] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0100] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0101] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A control method for a portable air conditioner, characterized in that, include: Obtain the compressor's operating frequency and the outdoor fan speed; The outdoor fan frequency is determined based on the outdoor fan speed. If the absolute value of the difference between the outdoor fan frequency and n times the compressor operating frequency is less than a multiple of the frequency range point, then the compressor operating frequency is adjusted; whereby... The frequency doubling interval is 5 Hz, and n is a positive integer; If the absolute value of the difference between the outdoor fan frequency and n times the compressor operating frequency is greater than or equal to the point of the frequency doubling interval, then the indoor fan speed is obtained. Determine the indoor fan frequency based on the indoor fan speed; If the absolute value of the difference between the outdoor fan frequency and m times the indoor fan frequency is less than the octave interval point, then the speed of the indoor fan is adjusted, where m is a positive integer.

2. The control method for a portable air conditioner according to claim 1, characterized in that, The operating frequency of the compressor is adjusted as follows: Each time the frequency is increased by 1 Hz until the absolute value of the difference between the outdoor fan frequency and n times the compressor operating frequency is greater than or equal to the octave interval point.

3. The control method for a portable air conditioner according to claim 1, characterized in that, Adjust the indoor fan speed as follows: Each time, the rotational speed is increased by 5 rpm / min until the absolute value of the difference between the outdoor fan frequency and m times the indoor fan frequency is greater than or equal to the octave interval point.

4. A portable air conditioner, characterized in that, The portable air conditioner is used to execute the control method according to any one of claims 1-3, and includes: A housing having an indoor air duct and an outdoor air duct; The system includes an indoor fan, an outdoor fan, and a compressor. The indoor fan is installed in the indoor side duct, the outdoor fan is installed in the outdoor side duct, and the compressor is installed in the housing. The impeller diameter of the indoor fan is different from that of the outdoor fan.

5. The portable air conditioner according to claim 4, characterized in that, The diameter of the indoor fan's impeller is smaller than that of the outdoor fan's impeller.

6. The portable air conditioner according to claim 4, characterized in that, The axial height of the impeller of the indoor fan is different from that of the impeller of the outdoor fan.

7. The portable air conditioner according to claim 6, characterized in that, The axial height of the impeller of the indoor fan is less than the axial height of the impeller of the outdoor fan.

8. The portable air conditioner according to claim 4, characterized in that, The projection of the indoor side air duct onto the axial direction of the indoor fan is a centrally symmetrical figure.

9. The portable air conditioner according to claim 4, characterized in that, Both the outdoor side air duct and the indoor side air duct are constructed as cross-flow air ducts.

10. The portable air conditioner according to claim 4, characterized in that, Buffer components are provided between the indoor fan and the indoor side air duct, the outdoor fan and the outdoor side air duct, and the compressor and the housing.

11. The portable air conditioner according to any one of claims 4-10, characterized in that, Also includes: The controller is electrically connected to the indoor fan, the outdoor fan, and the compressor, and is adapted to adjust the operating frequency of the compressor, the speed of the indoor fan, and the speed of the outdoor fan.

12. The portable air conditioner according to claim 4, characterized in that, Also includes: Multiple movable wheels are mounted on the housing.

13. The portable air conditioner according to claim 12, characterized in that, At least one pair of the said movable wheels is constructed as omnidirectional wheels.

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