Mobile air conditioner and control method thereof

Abstract

The invention provides a mobile air conditioner and a control method thereof. The control method of the mobile air conditioner comprises the steps that the indoor environment temperature and the indoor coil pipe temperature are obtained; whether a high-temperature protection program is triggered or not is judged at least according to the indoor environment temperature and the indoor coil pipe temperature; the high-temperature protection program at least controls the outer fan to stop and restart; if yes, running a high-temperature protection program; and whether a defrosting program is started or not is judged according to the temperature of the outer fan and / or the compressor and / or the indoor coil pipe. The temperature sampling scheme is fine, the defrosting protection logic for the mobile air conditioner of the heat pump type is provided, the defrosting protection logic is scientific, reasonable and easy to implement, fine protection can be carried out on the situation that the coil temperature of the indoor unit and the coil temperature of the outdoor unit are close, and the coil temperature is close to the indoor temperature; the problem that defrosting protection logic of an existing heat pump type mobile air conditioner is difficult is solved, and therefore effective defrosting of the heat pump type mobile air conditioner can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to a mobile air conditioner and a control method thereof. Background Art

[0002] Mobile air conditioners are different from conventional split air conditioners. The internal and external units of mobile air conditioners are integrated into one, and the internal and external units are arranged in the same space, and the structural layout is relatively dense. When considering the defrost protection logic of a mobile air conditioner with a heat pump in heating mode, due to the large structural difference between the mobile air conditioner and the split air conditioner, the internal temperature difference of the mobile air conditioner is smaller than that of the split air conditioner. During defrosting, the pipe temperature states of the mobile air conditioner and the split air conditioner are very different. Therefore, the defrost protection logic of the split air conditioner cannot be directly borrowed.

[0003] The difference between the coil temperature of the inner and outer units of the heat pump mobile air conditioner is small, and the difference between the coil temperature and the indoor temperature is also small, which leads to difficulties in the defrost protection logic of the heat pump mobile air conditioner. There is no reasonable and effective defrost protection logic for the heat pump mobile air conditioner in the prior art, resulting in poor defrosting effect. Summary of the invention

[0004] In view of the above problems, the present invention is proposed to provide a mobile air conditioner and a control method thereof that overcome the above problems or at least partially solve the above problems, and can solve the problem that the existing heat pump type mobile air conditioner does not have a reasonable and effective defrost protection logic, so as to achieve the purpose of improving the defrost effect.

[0005] Specifically, the present invention provides a control method for a mobile air conditioner, comprising:

[0006] Get the indoor ambient temperature and indoor coil temperature;

[0007] At least judging whether to trigger a high temperature protection program based on the indoor ambient temperature and the indoor coil temperature; the high temperature protection program includes at least controlling the outdoor fan to stop and restart;

[0008] If yes, run the high temperature protection program;

[0009] Whether to enter the defrost program is determined according to the temperature of the outdoor fan and / or the compressor and / or the indoor coil.

[0010] Optionally, judging whether to trigger a high temperature protection program at least according to the indoor ambient temperature and the indoor coil temperature includes:

[0011] Acquire at least two differences between the indoor coil temperature and the indoor ambient temperature, wherein the at least two differences include a first difference earlier in time and a second difference later in time;

[0012] Whether to trigger the high temperature protection program is determined at least according to the difference between the first difference and the second difference.

[0013] Optionally, judging whether to trigger the high temperature protection program at least based on the difference between the first difference and the second difference includes: judging whether to trigger the high temperature protection program based on the size and / or duration of the difference between the first difference and the second difference.

[0014] Optionally, the high temperature protection program includes a first high temperature protection program and a second high temperature protection program;

[0015] The first high temperature protection program includes: turning off the outdoor fan and the shutdown time of the outdoor fan is not less than a first preset time; when the indoor coil temperature is less than or equal to the first preset coil temperature, starting the outdoor fan; or, when the shutdown time of the outdoor fan reaches a second preset time and the indoor coil temperature is greater than the first preset coil temperature, starting the outdoor fan; wherein the second preset time is greater than the first preset time;

[0016] The second high temperature protection program includes: shutting down the compressor and the outdoor fan, and adjusting the speed of the indoor fan according to a third preset strategy; when the shutdown time of the compressor is greater than or equal to the third preset time, and the indoor coil temperature is less than or equal to the first preset coil temperature, starting the compressor and the outdoor fan;

[0017] The step of judging whether to trigger the high temperature protection program according to the size and / or duration of the difference between the first difference and the second difference includes:

[0018] When the difference between the first difference and the second difference is greater than or equal to the first preset difference and less than the second preset difference, and the duration is greater than or equal to the first preset time, the first high temperature protection program is triggered; when the difference between the first difference and the second difference is greater than or equal to the second preset difference, the second high temperature protection program is triggered; the first preset difference is less than the second preset difference.

[0019] Optionally, the control method further includes: adjusting the rotation speed of the indoor fan at least according to the indoor ambient temperature and the indoor coil temperature.

[0020] Optionally, the adjusting the speed of the indoor fan at least according to the indoor ambient temperature and the indoor coil temperature includes: when the difference between the first difference and the second difference is greater than or equal to a first preset difference, adjusting the speed of the indoor fan according to a first preset strategy; when the difference between the first difference and the second difference is greater than or equal to a fourth preset difference and less than a third preset difference, adjusting the speed of the indoor fan according to a second preset strategy; when the difference between the first difference and the second difference is greater than or equal to a third preset difference and less than the first preset difference, adjusting the speed of the indoor fan according to a third preset strategy; the first preset difference is greater than the third preset difference, and the third preset difference is greater than the fourth preset difference;

[0021] The step of adjusting the speed of the internal fan according to the first preset strategy includes:

[0022] Controlling the speed of the internal fan to operate at a gear corresponding to the first temperature interval of the indoor coil temperature; wherein the speed of the internal fan is set to a plurality of gears, each gear is set to correspond to the first temperature interval of the indoor coil temperature, and the gear corresponding to the first temperature interval with a higher temperature is higher than the gear corresponding to the first temperature interval with a lower temperature;

[0023] The step of adjusting the speed of the internal fan according to the second preset strategy includes:

[0024] Determine the speed of the indoor fan according to the indoor coil temperature, so that the speed of the indoor fan operates at a gear corresponding to a second temperature interval where the indoor coil temperature is located; the second temperature interval includes a first interval and a second interval, the indoor coil temperature corresponding to the first interval is lower than the indoor coil temperature corresponding to the second interval, and the gear corresponding to the first interval is lower than the gear corresponding to the second interval;

[0025] The adjusting the speed of the internal fan according to the third preset strategy includes:

[0026] First adjust the speed of the internal fan to the first gear, and then determine again whether the difference between the first difference and the second difference satisfies the requirement that it is greater than or equal to the third preset difference and less than the first preset difference. If so, adjust the speed of the internal fan to the second gear, and the second gear is greater than the first gear.

[0027] Optionally, judging whether to enter the defrost program based on the temperature of the outdoor fan and / or the compressor and / or the indoor coil includes: when the outdoor fan and the compressor meet a first preset condition, if the indoor coil temperature is less than or equal to the indoor coil defrost temperature, entering the defrost program.

[0028] Optionally, the control method further includes: when the first difference is equal to the second difference and the duration is greater than or equal to the second preset time, the continuous operation time of the outdoor fan is greater than or equal to the third preset time, and the cumulative operation time of the compressor is greater than or equal to the fourth preset time, if the indoor coil temperature is less than or equal to the indoor coil defrost temperature, entering the defrost program; or,

[0029] When the first difference is equal to the second difference and the duration is greater than or equal to the second preset time, the continuous operation time of the outdoor fan is greater than or equal to the third preset time, and the continuous operation time of the compressor is greater than or equal to the fifth preset time, if the indoor coil temperature is less than or equal to the indoor coil defrost temperature, the defrost procedure is entered; or,

[0030] When the accumulated running time of the compressor is greater than or equal to the sixth preset time and / or the continuous running time of the compressor is greater than or equal to the seventh preset time, if the indoor coil temperature is less than or equal to the indoor coil defrost temperature, the defrost program is entered; wherein the sixth preset time is greater than the fourth preset time, and the seventh preset time is greater than the fifth preset time.

[0031] Optionally, the defrost program includes: turning off the indoor fan, the outdoor fan, the compressor and the four-way valve, and starting the compressor after the duration of the closure of the four-way valve reaches an eighth preset time; turning off the compressor and starting the outdoor fan and the indoor fan after the duration of the defrost program reaches a ninth preset time; opening the four-way valve after waiting for a tenth preset time; starting the compressor and exiting the defrost program after the duration of the opening of the four-way valve reaches an eleventh preset time.

[0032] The present invention also provides a mobile air conditioner, which includes a controller, wherein the controller includes a memory, a processor, and a machine executable program stored in the memory and running on the processor, and when the processor executes the machine executable program, the control method described in any one of the above is implemented.

[0033] In the control method of the mobile air conditioner of the present invention, a technical means is adopted to determine whether to trigger the high temperature protection program according to the indoor ambient temperature and the indoor coil temperature, and after the high temperature protection program is triggered and the high temperature program is run, determine whether to enter the defrost program according to the temperature of the outdoor fan and / or the compressor and / or the indoor coil. The temperature sampling scheme in the present invention is refined, and a defrost protection logic for a mobile air conditioner of a heat pump type is provided. The defrost protection logic is scientific, reasonable and easy to implement, and can provide refined protection for scenarios where the coil temperatures of the internal and external units are close, and the coil temperature is close to the indoor temperature, solving the problem of the difficulty of the defrost protection logic of the mobile air conditioner of the existing heat pump type, thereby achieving effective defrosting of the mobile air conditioner of the heat pump type.

[0034] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0036] Figure 1 is a schematic flow chart of a control method for a mobile air conditioner according to an embodiment of the present invention;

[0037] Figure 2 is a schematic flow chart of determining whether to trigger a high temperature protection program in a control method of a mobile air conditioner according to an embodiment of the present invention;

[0038] Figure 3 is a schematic flow chart of triggering different high temperature protection programs in a control method of a mobile air conditioner according to an embodiment of the present invention;

[0039] Figure 4 is a schematic structural diagram of a controller in a mobile air conditioner according to an embodiment of the present invention. DETAILED DESCRIPTION

[0040] Refer to the following Figures 1 to 4 To describe the mobile air conditioner and the control method thereof of the embodiment of the present invention. In the description of this embodiment, it should be understood that the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features, that is, include one or more of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. When a feature "includes or contains" one or some of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may further include other features.

[0041] In the description of the present embodiment, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0042] Figure 1 is a schematic flow chart of a control method for a mobile air conditioner according to an embodiment of the present invention, Figure 1 As shown, and refer to Figures 2 to 3 , an embodiment of the present invention provides a control method for a mobile air conditioner, comprising the following steps:

[0043] Step S100: Acquire the indoor ambient temperature and the indoor coil temperature.

[0044] Step S101: judging whether to trigger the high temperature protection program at least based on the indoor ambient temperature and the indoor coil temperature; the high temperature protection program includes at least controlling the outdoor fan to stop and restart. If yes, executing step S102.

[0045] Step S102: running the high temperature protection program.

[0046] Step S103: Determine whether to enter the defrosting procedure according to the temperature of the outdoor fan and / or the compressor and / or the indoor coil.

[0047] In this embodiment, the indoor environment temperature and the indoor coil temperature are acquired once every sampling period.

[0048] The present invention determines whether to trigger the high temperature protection program at least based on the indoor ambient temperature and the indoor coil temperature, and determines whether to enter the defrost program based on the status of the outdoor fan and / or the compressor and / or the indoor coil temperature when running the high temperature protection program.

[0049] Among them, judging whether to enter the defrost program according to the temperature of the outdoor fan and / or the compressor and / or the indoor coil includes the following types: ① judging whether to enter the defrost program according to the status of the outdoor fan, the compressor and the indoor coil temperature; ② judging whether to enter the defrost program according to the status of the outdoor fan; ③ judging whether to enter the defrost program according to the status of the outdoor fan and the status of the compressor; ④ judging whether to enter the defrost program according to the status of the outdoor fan and the status of the indoor coil temperature; ⑤ judging whether to enter the defrost program according to the status of the compressor and the status of the indoor coil temperature; ⑥ judging whether to enter the defrost program according to the status of the compressor; ⑦ judging whether to enter the defrost program according to the status of the indoor coil temperature.

[0050] In this embodiment, the temperature sampling scheme of the present invention is refined, and provides a defrost protection logic for a mobile air conditioner of a heat pump type. The defrost protection logic is scientific, reasonable and easy to implement, and can provide refined protection for scenarios where the coil temperatures of the indoor and outdoor units are close, and the coil temperature is close to the indoor temperature, thereby enabling the mobile air conditioner of the heat pump type to achieve effective defrost.

[0051] In some embodiments of the present invention, Figure 2 As shown, judging whether to trigger the high temperature protection program at least based on the indoor ambient temperature and the indoor coil temperature includes the following steps:

[0052] Step S200: obtaining at least two differences between the indoor ambient temperature and the indoor coil temperature, wherein the at least two differences include a first difference earlier in time and a second difference later in time.

[0053] Step S201: determining whether to trigger a high temperature protection program at least according to the difference between the first difference and the second difference.

[0054] In this embodiment, at least two differences between the indoor ambient temperature and the indoor coil temperature are obtained, and the at least two differences include a first difference earlier in time and a second difference later in time, including: when the number of continuously obtained differences between the indoor coil temperature and the indoor ambient temperature reaches a first preset number, determining that the difference between the first indoor coil temperature and the indoor ambient temperature is the first difference, and determining that the difference between the last indoor coil temperature and the indoor ambient temperature is the second difference.

[0055] The difference between the indoor coil temperature and the indoor ambient temperature obtained at each sampling period is stored in the memory of the mobile air conditioner, and the memory stores a first preset number of differences between the indoor coil temperature and the indoor ambient temperature in a queue.

[0056] Preferably, the first preset number is 20, which can be adjusted according to actual conditions.

[0057] For example, after the mobile air conditioner starts the heating mode, the difference between the indoor coil temperature and the indoor ambient temperature obtained at each sampling period is stored in the memory of the mobile air conditioner. When the number of the difference between the indoor coil temperature and the indoor ambient temperature stored in the memory reaches the first preset number, when the newly obtained difference between the indoor coil temperature and the indoor ambient temperature needs to be stored in the memory again, the stored difference is moved in a queue in a sequential order, so that the difference first stored in the memory is removed from the memory, and the newly obtained difference between the indoor coil temperature and the indoor ambient temperature is stored in the memory. The latest first preset number of differences is always stored in the memory. Among them, the first difference between the indoor coil temperature and the indoor ambient temperature obtained in the first preset number is the first difference, that is, the first difference in time; the last difference between the indoor coil temperature and the indoor ambient temperature obtained in the first preset number is the second difference, that is, the second difference in time. Then, whether to trigger the high temperature protection program is determined according to the difference between the first difference and the second difference.

[0058] Through the control method of this embodiment, the present invention adopts a queue method to store the difference between the indoor coil temperature and the indoor ambient temperature in the memory, ensuring that the memory always stores the latest first preset number of differences, and then finely judges whether to trigger the high temperature protection program based on the difference between the first difference and the second difference in the memory, thereby improving the accuracy of judging whether to trigger the high temperature protection program.

[0059] In some embodiments of the present invention, whether to trigger the high temperature protection program is determined at least based on the difference between the first difference and the second difference, including: determining whether to trigger the high temperature protection program based on the size and / or duration of the difference between the first difference and the second difference.

[0060] In this embodiment, the first implementation is to determine whether to trigger the high temperature protection program according to the relationship between the size of the difference between the first difference and the second difference and the preset value. The second implementation is to determine whether to trigger the high temperature protection program according to the relationship between the size of the difference between the first difference and the second difference and the preset value, and the duration of the difference between the first difference and the second difference. The third implementation is to determine whether to trigger the high temperature protection program according to the duration of the difference between the first difference and the second difference.

[0061] Through the control method of this embodiment, whether to trigger the high temperature protection program is determined based on the size and / or duration of the difference between the first difference and the second difference, thereby improving the accuracy of the mobile air conditioner in determining whether to trigger the high temperature protection program.

[0062] In some embodiments of the present invention, the high temperature protection program includes a first high temperature protection program and a second high temperature protection program. The first high temperature protection program includes: turning off the external fan and the shutdown time of the external fan is not less than the first preset time; when the indoor coil temperature is less than or equal to the first preset coil temperature, starting the external fan; or when the shutdown time of the external fan reaches the second preset time and the indoor coil temperature is greater than the first preset coil temperature, starting the external fan; wherein the second preset time is greater than the first preset time.

[0063] The second high temperature protection program includes: turning off the compressor and the outdoor fan, and adjusting the speed of the indoor fan according to the third preset strategy; when the shutdown time of the compressor is greater than or equal to the third preset time and the indoor coil temperature is less than or equal to the first preset coil temperature, starting the compressor and the outdoor fan.

[0064] like Figure 3 As shown, judging whether to trigger the high temperature protection program according to the size and / or duration of the difference between the first difference and the second difference includes the following steps:

[0065] Step S300: When the difference between the first difference and the second difference is greater than or equal to the first preset difference and less than the second preset difference, and the duration is greater than or equal to the first preset time, the first high temperature protection program is triggered.

[0066] Step S301: When the difference between the first difference and the second difference is greater than or equal to the second preset difference, the second high temperature protection program is triggered.

[0067] Preferably, the first preset difference is smaller than the second preset difference.

[0068] In this embodiment, the first execution method is: judging whether to trigger the first high temperature protection program according to the size and duration of the difference between the first difference and the second difference; adjusting the state of the outdoor fan and its duration after the first high temperature protection program is triggered, and adjusting the state of the outdoor fan according to the indoor coil temperature to reduce the temperature of the mobile air conditioner.

[0069] The second execution method is: judging whether to trigger the second high temperature protection program according to the relationship between the difference between the first difference and the second difference and the second preset difference; adjusting the state of the compressor and the outdoor fan, and adjusting the wind speed of the indoor fan after the second high temperature protection program is triggered; and then adjusting the state of the compressor and the outdoor fan according to the shutdown time of the compressor and the indoor coil temperature to reduce the temperature of the mobile air conditioner.

[0070] Through the control method of this embodiment, whether to trigger the high temperature protection program is determined based on the size and / or duration of the difference between the first difference and the second difference; and after the high temperature protection program is triggered, the first high temperature protection program or the second high temperature protection program is selected to be triggered according to a preset relationship, and then the mobile air conditioner is finely cooled according to the first high temperature protection program or the second high temperature protection program to improve the safety of the mobile air conditioner.

[0071] In some embodiments of the present invention, the control method further includes: adjusting the rotation speed of the indoor fan at least according to the indoor ambient temperature and the indoor coil temperature.

[0072] In this embodiment, the first implementation is: on the premise that step S200 has been executed, the speed of the internal fan is adjusted according to the relationship between the difference between the first difference and the second difference and the preset difference.

[0073] The second implementation mode is: on the premise that step S200 has been executed, the speed of the indoor fan is adjusted according to the relationship between the difference between the first difference and the second difference and the preset difference and the relationship between the indoor coil temperature and the preset coil temperature;

[0074] Through the control method of this embodiment, at least the "indoor ambient temperature" and the "indoor coil temperature" are used as judgment conditions for adjusting the speed of the indoor fan, so as to improve the accuracy of adjusting the speed of the indoor fan.

[0075] In some embodiments of the present invention, the speed of the indoor fan is adjusted at least according to the indoor ambient temperature and the indoor coil temperature, including: when the difference between the first difference and the second difference is greater than or equal to the first preset difference, the speed of the indoor fan is adjusted according to the first preset strategy; when the difference between the first difference and the second difference is greater than or equal to the fourth preset difference and less than the third preset difference, the speed of the indoor fan is adjusted according to the second preset strategy; when the difference between the first difference and the second difference is greater than or equal to the third preset difference and less than the first preset difference, the speed of the indoor fan is adjusted according to the third preset strategy; the first preset difference is greater than the third preset difference, and the third preset difference is greater than the fourth preset difference.

[0076] Among them, adjusting the speed of the indoor fan according to the first preset strategy includes: controlling the speed of the indoor fan to operate at a gear corresponding to the first temperature range of the indoor coil temperature; wherein the speed of the indoor fan is set with several gears, each gear is set with a corresponding first temperature range of the indoor coil temperature, and the gear corresponding to the first temperature range with a higher temperature is higher than the gear corresponding to the first temperature range with a lower temperature.

[0077] The speed of the indoor fan is adjusted according to a second preset strategy, including: determining the speed of the indoor fan according to the indoor coil temperature, so that the speed of the indoor fan operates at a gear corresponding to a second temperature range in which the indoor coil temperature is located; the second temperature range includes a first range and a second range, the indoor coil temperature corresponding to the first range is lower than the indoor coil temperature corresponding to the second range, and the gear corresponding to the first range is lower than the gear corresponding to the second range.

[0078] The internal fan speed is adjusted according to the third preset strategy, including: first adjusting the internal fan speed to the first gear, and then determining again whether the difference between the first difference and the second difference satisfies the condition that the difference is greater than or equal to the third preset difference and less than the first preset difference; if so, adjusting the internal fan speed to the second gear, which is greater than the first gear.

[0079] In this embodiment, the gears of the indoor fan include n gears, which are first speed, second speed, third speed, fourth speed, and nth speed, from small to large. The indoor coil temperature Tp has n preset coil temperatures, which are first preset coil temperature Tp1, second preset coil temperature Tp2, third preset coil temperature Tp3, fourth preset coil temperature Tp4, and nth preset coil temperature Tpn, from small to large.

[0080] Furthermore, when the difference between the first difference and the second difference is greater than or equal to the first preset difference, Tp is in a stage rising state, and the speed of the indoor fan is adjusted according to the first preset strategy: when the indoor coil temperature is in the interval [Tpn-1, Tpn), the speed of the indoor fan is adjusted to the n-1 speed; when the indoor coil temperature is lower than the first preset coil temperature, the indoor fan stops; when the indoor coil temperature is greater than or equal to the nth preset coil temperature, the speed of the indoor fan is adjusted to the nth speed.

[0081] When the difference between the first difference and the second difference is greater than or equal to the fourth preset difference and less than the third preset difference, it is determined that Tp is in a staged decrease state. At this time, the speed of the indoor fan is adjusted according to the second preset strategy: when the indoor coil temperature is less than Tp1, the indoor fan is shut down; when the indoor coil temperature is greater than Tpn-1, the speed of the indoor fan is adjusted to level n; when the indoor coil temperature is in the interval (Tpn-2, Tpn-1], the speed of the indoor fan is adjusted to level n-1.

[0082] When the difference between the first difference and the second difference is greater than or equal to the third preset difference and less than the first preset difference, it is determined that Tp is in a stage holding state, and the speed of the internal fan is adjusted according to the third preset strategy: at intervals, it is determined again whether the difference between the first difference and the second difference satisfies the condition of being greater than or equal to the third preset difference and less than the first preset difference; if so, the gear of the speed of the internal fan is adjusted from the first gear to the second gear, and the highest speed in the second gear is the fourth speed. The above period of time can be determined according to actual conditions, and the more times the difference between the first difference and the second difference is judged to be greater than or equal to the third preset difference and less than the first preset difference, the longer the interval time.

[0083] When the gear of the internal fan speed is the fourth speed, and the difference between the first difference and the second difference always remains greater than or equal to the third preset difference and less than the first preset difference, the internal fan speed will no longer change; when the difference between the first difference and the second difference no longer satisfies the condition of being greater than or equal to the third preset difference and less than the first preset difference, the internal fan speed will change.

[0084] In the case where the difference between the first difference and the second difference is greater than or equal to the first preset difference, when the first difference is equal to the second difference later, the speed of the internal fan is adjusted according to the third preset strategy. Alternatively, in the case where the difference between the first difference and the second difference is greater than or equal to the fourth preset difference and less than the third preset difference, when the first difference is equal to the second difference later, the speed of the internal fan is adjusted according to the third preset strategy.

[0085] Through the control method of this embodiment, the preset strategy for adjusting the speed of the indoor fan is determined according to the difference between the first difference and the second difference; and then in the first preset strategy or the second preset strategy, the speed of the indoor fan is adjusted according to the indoor coil temperature, so as to achieve the effect of finely adjusting the speed of the indoor fan and finely cooling the indoor coil; and in the third preset strategy, it is determined whether to adjust the speed of the indoor fan according to the difference between the first difference and the second difference, so as to achieve the effect of finely adjusting the speed of the indoor fan.

[0086] In some embodiments of the present invention, whether to enter the defrost program is determined based on the temperature of the outdoor fan and / or the compressor and / or the indoor coil, including: when the outdoor fan and the compressor meet the first preset condition, if the indoor coil temperature is less than or equal to the indoor coil defrost temperature, then entering the defrost program.

[0087] In this embodiment, when the mobile air conditioner has triggered the high temperature protection program, it is determined whether the external fan and the compressor meet the corresponding preset conditions; if both meet the corresponding preset conditions, it is determined whether the indoor coil temperature is less than or equal to the indoor coil defrost temperature; if the indoor coil temperature is less than or equal to the indoor coil defrost temperature, the defrost program is entered. When the external fan or the compressor does not meet the first preset condition, or the indoor coil temperature is greater than the indoor coil defrost temperature, the mobile air conditioner does not enter the defrost program.

[0088] Preferably, the first preset condition includes a preset condition corresponding to the external fan and a preset condition corresponding to the compressor.

[0089] Through the control method of this embodiment, when the outdoor fan and the compressor both meet the first preset condition, the relationship between the indoor coil temperature and the indoor coil defrost temperature is judged, and a refined judgment is made on whether the mobile air conditioner is to be defrosted, thereby improving the accuracy of the mobile air conditioner in judging whether to defrost.

[0090] In some embodiments of the present invention, the control method also includes: when the first difference is equal to the second difference and the duration is greater than or equal to the second preset time, the continuous operation time of the external fan is greater than or equal to the third preset time, and the cumulative operation time of the compressor is greater than or equal to the fourth preset time, if the indoor coil temperature is less than or equal to the indoor coil defrost temperature, then entering the defrost program.

[0091] Alternatively, when the first difference is equal to the second difference and the duration is greater than or equal to the second preset time, the continuous operation time of the outdoor fan is greater than or equal to the third preset time, and the continuous operation time of the compressor is greater than or equal to the fifth preset time, if the indoor coil temperature is less than or equal to the indoor coil defrost temperature, the defrost program is entered.

[0092] Alternatively, when the accumulated compressor operation time is greater than or equal to the sixth preset time and / or the continuous compressor operation time is greater than or equal to the seventh preset time, if the indoor coil temperature is less than or equal to the indoor coil defrosting temperature, the defrosting procedure is entered, wherein the sixth preset time is greater than the fourth preset time, and the seventh preset time is greater than the fifth preset time.

[0093] Preferably, the second preset time, the third preset time, the fourth preset time, the fifth preset time, the sixth preset time and the seventh preset time can be adjusted according to actual conditions; the indoor coil defrost temperature is a preset indoor coil defrost temperature critical value, which can be adjusted according to actual conditions.

[0094] Through the control method of this embodiment, the present invention adopts a technical means to judge whether the compressor and / or the outdoor fan meets the corresponding preset conditions before judging the relationship between the indoor coil temperature and the indoor coil defrost temperature, so as to refine the judgment of whether the mobile air conditioner is defrosted and improve the accuracy of defrosting of the mobile air conditioner.

[0095] In some embodiments of the present invention, the defrost program includes: turning off the indoor fan, outdoor fan, compressor and four-way valve, and starting the compressor after the duration of the four-way valve closure reaches the eighth preset time; turning off the compressor and starting the outdoor fan and indoor fan after the duration of the defrost program reaches the ninth preset time; opening the four-way valve after waiting for the tenth preset time; starting the compressor and exiting the defrost program after the duration of the four-way valve opening reaches the eleventh preset time.

[0096] Preferably, the starting speed of the indoor fan is the first-level speed, and the duration of the defrost protection is the ninth preset time; the eighth preset time, the ninth preset time, the tenth preset time and the eleventh preset time can be determined according to actual conditions; the indoor coil temperature and the indoor ambient temperature can be obtained through temperature detection instruments such as temperature sensors, and the position of the temperature detection instrument can be set at the corresponding position of the mobile air conditioner.

[0097] In this embodiment, when the mobile air conditioner enters the defrost program, the heating mode of the mobile air conditioner remains unchanged. At the same time, the indoor coil temperature is not detected during the defrost program. After exiting the defrost program, the indoor coil temperature and indoor ambient temperature are obtained every sampling period.

[0098] Through the control method of this embodiment, the present invention performs defrosting by adjusting the states of the inner fan, the outer fan, the compressor and the four-way valve, and sets a suitable duration of defrost protection to ensure the defrosting effect of the mobile air conditioner, while ensuring the heating effect of the mobile air conditioner and improving the user experience.

[0099] The present invention also provides a mobile air conditioner, which includes a controller 50, the controller 50 includes a memory 520, a processor 510 and a machine executable program 41 stored in the memory 520 and running on the processor 510, and the processor 510 implements any control method described in the above embodiments when executing the machine executable program 41.

[0100] It should be noted that the logic and / or steps represented in the flowchart or described in other ways 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 an instruction execution system, device or equipment (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or equipment and execute instructions), or used in combination with these instruction execution systems, devices or equipment.

[0101] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0102] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived based on the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all these other variations or modifications.

Claims

1. A control method for a mobile air conditioner, characterized in that: include: Get the indoor ambient temperature and indoor coil temperature; At least judging whether to trigger a high temperature protection program based on the indoor ambient temperature and the indoor coil temperature; the high temperature protection program includes at least controlling the outdoor fan to stop and restart; If yes, run the high temperature protection program; Whether to enter the defrost program is determined according to the temperature of the outdoor fan and / or the compressor and / or the indoor coil.

2. The control method according to claim 1, characterized in that: The step of determining whether to trigger the high temperature protection program at least based on the indoor ambient temperature and the indoor coil temperature includes: Acquire at least two differences between the indoor coil temperature and the indoor ambient temperature, wherein the at least two differences include a first difference earlier in time and a second difference later in time; Whether to trigger the high temperature protection program is determined at least according to the difference between the first difference and the second difference.

3. The control method according to claim 2, characterized in that: The step of determining whether to trigger the high temperature protection program at least according to the difference between the first difference and the second difference includes: Whether to trigger the high temperature protection program is determined according to the size and / or duration of the difference between the first difference and the second difference.

4. The control method according to claim 3, characterized in that: The high temperature protection program includes a first high temperature protection program and a second high temperature protection program; The first high temperature protection program includes: turning off the outdoor fan and the shutdown time of the outdoor fan is not less than a first preset time; when the indoor coil temperature is less than or equal to the first preset coil temperature, starting the outdoor fan; or, when the shutdown time of the outdoor fan reaches a second preset time and the indoor coil temperature is greater than the first preset coil temperature, starting the outdoor fan; wherein the second preset time is greater than the first preset time; The second high temperature protection program includes: shutting down the compressor and the outdoor fan, and adjusting the speed of the indoor fan according to a third preset strategy; when the shutdown time of the compressor is greater than or equal to the third preset time, and the indoor coil temperature is less than or equal to the first preset coil temperature, starting the compressor and the outdoor fan; The step of judging whether to trigger the high temperature protection program according to the size and / or duration of the difference between the first difference and the second difference includes: When the difference between the first difference and the second difference is greater than or equal to the first preset difference and less than the second preset difference, and the duration is greater than or equal to the first preset time, the first high temperature protection program is triggered; when the difference between the first difference and the second difference is greater than or equal to the second preset difference, the second high temperature protection program is triggered; the first preset difference is less than the second preset difference.

5. The control method according to claim 2, characterized in that: Also includes: The rotation speed of the indoor fan is adjusted at least according to the indoor ambient temperature and the indoor coil temperature.

6. The control method according to claim 5, characterized in that: The adjusting the speed of the indoor fan at least according to the indoor ambient temperature and the indoor coil temperature comprises: When the difference between the first difference and the second difference is greater than or equal to the first preset difference, the speed of the internal fan is adjusted according to the first preset strategy; when the difference between the first difference and the second difference is greater than or equal to the fourth preset difference and less than the third preset difference, the speed of the internal fan is adjusted according to the second preset strategy; when the difference between the first difference and the second difference is greater than or equal to the third preset difference and less than the first preset difference, the speed of the internal fan is adjusted according to the third preset strategy; the first preset difference is greater than the third preset difference, and the third preset difference is greater than the fourth preset difference; The step of adjusting the speed of the internal fan according to the first preset strategy includes: Controlling the speed of the internal fan to operate at a gear corresponding to the first temperature interval of the indoor coil temperature; wherein the speed of the internal fan is set to a plurality of gears, each gear is set to correspond to the first temperature interval of the indoor coil temperature, and the gear corresponding to the first temperature interval with a higher temperature is higher than the gear corresponding to the first temperature interval with a lower temperature; The step of adjusting the speed of the internal fan according to the second preset strategy includes: Determine the speed of the indoor fan according to the indoor coil temperature, so that the speed of the indoor fan operates at a gear corresponding to a second temperature interval where the indoor coil temperature is located; the second temperature interval includes a first interval and a second interval, the indoor coil temperature corresponding to the first interval is lower than the indoor coil temperature corresponding to the second interval, and the gear corresponding to the first interval is lower than the gear corresponding to the second interval; The adjusting the speed of the internal fan according to the third preset strategy includes: First adjust the speed of the internal fan to the first gear, and then determine again whether the difference between the first difference and the second difference satisfies the requirement that it is greater than or equal to the third preset difference and less than the first preset difference. If so, adjust the speed of the internal fan to the second gear, and the second gear is greater than the first gear.

7. The control method according to claim 2, characterized in that: The step of judging whether to enter the defrosting procedure according to the temperature of the outdoor fan and / or the compressor and / or the indoor coil comprises: When the outdoor fan and the compressor meet the first preset condition, if the indoor coil temperature is less than or equal to the indoor coil defrosting temperature, the defrosting procedure is entered.

8. The control method according to claim 2, characterized in that: Also includes: When the first difference is equal to the second difference and the duration is greater than or equal to the second preset time, the continuous operation time of the outdoor fan is greater than or equal to the third preset time, and the cumulative operation time of the compressor is greater than or equal to the fourth preset time, if the indoor coil temperature is less than or equal to the indoor coil defrost temperature, enter the defrost program; or, When the first difference is equal to the second difference and the duration is greater than or equal to the second preset time, the continuous operation time of the outdoor fan is greater than or equal to the third preset time, and the continuous operation time of the compressor is greater than or equal to the fifth preset time, if the indoor coil temperature is less than or equal to the indoor coil defrost temperature, enter the defrost program; or, When the accumulated running time of the compressor is greater than or equal to the sixth preset time and / or the continuous running time of the compressor is greater than or equal to the seventh preset time, if the indoor coil temperature is less than or equal to the indoor coil defrosting temperature, the defrosting program is entered; Among them, the sixth preset time is greater than the fourth preset time, and the seventh preset time is greater than the fifth preset time.

9. The control method according to claim 1, characterized in that: The defrost procedure includes: Turning off the inner fan, the outer fan, the compressor and the four-way valve, and starting the compressor after the duration of the closure of the four-way valve reaches an eighth preset time; After the duration of the defrost program reaches a ninth preset time, the compressor is turned off, and the external fan and the internal fan are started; After waiting for the tenth preset time, the four-way valve is opened; After the duration of the opening of the four-way valve reaches an eleventh preset time, the compressor is started and the defrosting program is exited.

10. A mobile air conditioner, characterized in that: include: A controller, the controller comprising a memory, a processor and a machine executable program stored in the memory and running on the processor, and the processor implements the control method according to any one of claims 1 to 9 when executing the machine executable program.

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