Mobile air conditioner and control method thereof

Abstract

The application provides a mobile air conditioner and a control method thereof. The control method of the mobile air conditioner comprises: obtaining an indoor environment temperature and an indoor coil temperature; determining whether to trigger a high-temperature protection program according to at least the indoor environment temperature and the indoor coil temperature; the high-temperature protection program comprises at least controlling an outdoor fan to stop and start again; if yes, running the high-temperature protection program; determining whether to enter a defrosting program according to the outdoor fan, a compressor and / or the indoor coil temperature. The temperature sampling scheme in the application is fine, and a 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 realize, can finely protect the scene that the indoor and outdoor coil temperatures are close and the coil temperature and the indoor temperature are close, and solves the problem that the defrosting protection logic of the existing mobile air conditioner of the heat pump type is difficult, so that effective defrosting of the mobile air conditioner of the heat pump type can be realized.

Description

TECHNICAL FIELD

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

[0002] The mobile air conditioner is different from the conventional split air conditioner. The indoor unit and the outdoor unit of the mobile air conditioner are integrated, and the indoor unit and the outdoor unit are arranged in the same space, and the structural layout is relatively dense. When considering the defrost protection logic in the heating mode of the mobile air conditioner with a heat pump, because the structure of the mobile air conditioner is quite different from that of the split air conditioner, the temperature difference inside the mobile air conditioner is smaller than that inside the split air conditioner, and the pipe temperature state of the mobile air conditioner is quite different from that of the split air conditioner during defrosting, so the defrost protection logic of the split air conditioner cannot be directly borrowed.

[0003] The temperature difference between the indoor coil and the outdoor coil of the mobile air conditioner with a heat pump is small, and the temperature difference between the coil temperature and the indoor temperature is also small, which leads to the difficulty in the defrost protection logic of the mobile air conditioner with a heat pump. There is no reasonable and effective defrost protection logic for the mobile air conditioner with a heat pump in the prior art, which leads to poor defrosting effect. SUMMARY

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

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

[0006] obtaining an indoor environment temperature and an indoor coil temperature;

[0007] determining whether to trigger a high-temperature protection program according to at least the indoor environment temperature and the indoor coil temperature; the high-temperature protection program comprises at least controlling the outdoor fan to stop and start again;

[0008] if yes, running the high-temperature protection program;

[0009] determining whether to enter a defrost program according to the outdoor fan and / or the compressor and / or the indoor coil temperature.

[0010] Optionally, the determination of whether to trigger the high-temperature protection program according to at least the indoor environment temperature and the indoor coil temperature comprises:

[0011] obtaining at least two difference values between the indoor coil temperature and the indoor environment temperature, the at least two difference values comprising a first difference value in an earlier time and a second difference value in a later time;

[0012] determining whether to trigger a high-temperature protection procedure according to a difference between the first difference value and the second difference value.

[0013] Optionally, the determining whether to trigger the high-temperature protection procedure according to the difference between the first difference value and the second difference value comprises determining whether to trigger the high-temperature protection procedure according to a size and / or a duration of the difference between the first difference value and the second difference value.

[0014] Optionally, the high-temperature protection procedure comprises a first high-temperature protection procedure and a second high-temperature protection procedure.

[0015] The first high-temperature protection procedure comprises: shutting down the outdoor fan, and a shutdown duration of the outdoor fan is not less than a first preset duration; starting the outdoor fan when the indoor coil temperature is less than or equal to a first preset coil temperature; or starting the outdoor fan when the shutdown duration of the outdoor fan reaches a second preset duration and the indoor coil temperature is greater than the first preset coil temperature; wherein the second preset duration is greater than the first preset duration.

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

[0017] The determining whether to trigger the high-temperature protection procedure according to the size and / or the duration of the difference between the first difference value and the second difference value comprises:

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

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

[0020] Optionally, the adjusting the indoor fan rotating speed according to the indoor environment temperature and the indoor coil temperature comprises: when the difference between the first difference value and the second difference value is greater than or equal to a first preset difference value, adjusting the indoor fan rotating speed according to a first preset strategy; when the difference between the first difference value and the second difference value is greater than or equal to a fourth preset difference value and less than a third preset difference value, adjusting the indoor fan rotating speed according to a second preset strategy; when the difference between the first difference value and the second difference value is greater than or equal to the third preset difference value and less than the first preset difference value, adjusting the indoor fan rotating speed according to a third preset strategy; the first preset difference value is greater than the third preset difference value, and the third preset difference value is greater than the fourth preset difference value.

[0021] The adjusting the indoor fan rotating speed according to the first preset strategy comprises:

[0022] controlling the indoor fan rotating speed to run according to a gear corresponding to a first temperature interval of the indoor coil temperature; wherein the indoor fan rotating speed is provided with a plurality of gears, each gear is provided with a corresponding first temperature interval of the indoor coil temperature, and the gear corresponding to a first temperature interval with higher temperature is higher than the gear corresponding to a first temperature interval with lower temperature.

[0023] The adjusting the indoor fan rotating speed according to the second preset strategy comprises:

[0024] determining the indoor fan rotating speed according to the indoor coil temperature, so that the indoor fan rotating speed runs according to a gear corresponding to a second temperature interval of the indoor coil temperature; the second temperature interval comprises a first interval and a second interval, the indoor coil temperature corresponding to the first interval is less than the indoor coil temperature corresponding to the second interval, and the gear corresponding to the first interval is less than the gear corresponding to the second interval.

[0025] The adjusting the indoor fan rotating speed according to the third preset strategy comprises:

[0026] first adjusting the indoor fan rotating speed to a first gear, and then judging again whether the difference between the first difference value and the second difference value satisfies greater than or equal to a third preset difference value and less than a first preset difference value, if yes, adjusting the indoor fan rotating speed to a second gear, the second gear is greater than the first gear.

[0027] Optionally, the judging whether to enter the defrosting program according to the outdoor fan and / or the compressor and / or the indoor coil temperature comprises: when the outdoor fan and the compressor satisfy a first preset condition, if the indoor coil temperature is less than or equal to an indoor coil defrosting temperature, entering the defrosting program.

[0028] Optionally, the control method further comprises: when the first difference value is equal to the second difference value, the duration is greater than or equal to the second preset time, the continuous running time of the outdoor fan is greater than or equal to the third preset time, and the cumulative running 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 a defrost program; or,

[0029] When the first difference value is equal to the second difference value, the duration is greater than or equal to the second preset time, the continuous running time of the outdoor fan is greater than or equal to the third preset time, and the continuous running 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, entering a defrost program; or,

[0030] When the cumulative 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, entering a defrost program; 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 comprises: closing the indoor fan, the outdoor fan, the compressor and the four-way valve, after the duration of the closed four-way valve reaches the eighth preset time, starting the compressor; after the duration of the defrost program reaches the ninth preset time, closing the compressor, starting the outdoor fan and the indoor fan; after waiting for the tenth preset time, opening the four-way valve; after the duration of the opened four-way valve reaches the eleventh preset time, starting the compressor and exiting the defrost program.

[0032] The application further provides a mobile air conditioner, comprising a controller, wherein the controller comprises 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 of any one of the above when executing the machine executable program.

[0033] In the control method of the mobile air conditioner, the technology of judging whether to trigger a high temperature protection program according to the indoor environment temperature and the indoor coil temperature is adopted, and after triggering the high temperature protection program and running the high temperature program, the technology of judging whether to enter a defrost program according to the outdoor fan and / or the compressor and / or the indoor coil temperature is adopted. The temperature sampling scheme in the application is fine, and a defrost protection logic for the mobile air conditioner of the heat pump type is provided, which is scientific, reasonable and easy to implement. The defrost protection logic can finely protect the scene of close indoor and outdoor coil temperatures and close indoor temperature and coil temperature, and solves the problem that the defrost protection logic of the existing mobile air conditioner of the heat pump type is difficult to implement, so as to realize effective defrosting of the mobile air conditioner of the heat pump type.

[0034] The above and other objects, advantages and features of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which: BRIEF DESCRIPTION OF DRAWINGS

[0035] Reference will now be made in detail embodiments of the application, one or more examples of which are illustrated in the drawings. The same or similar components have the same or similar reference numbers and symbols throughout the drawings and the specification. It should be understood that the drawings are not necessarily to scale. In the drawings:

[0036] Figure 1 is a schematic flowchart of a control method of a mobile air conditioner according to an embodiment of the present application;

[0037] Figure 2 is a schematic flowchart of determining whether to trigger a high-temperature protection procedure in a control method of a mobile air conditioner according to an embodiment of the present application;

[0038] Figure 3 is a schematic flowchart of triggering different high-temperature protection procedures in a control method of a mobile air conditioner according to an embodiment of the present application;

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

[0040] The mobile air conditioner and the control method thereof according to embodiments of the present application will be described below with reference to Figures 1 to 4 In the description of the embodiments, it is to be understood that the terms "first", "second", "third" and the like, do not imply any importance or any relative importance among the technical features referred to and cannot be understood as implying a certain number of technical features. Thus, a technical feature defined with "first", "second", "third" can include at least one of the technical feature, i.e. one or more of the technical feature. In the description of the embodiments, the meaning of "plurality" is at least two, e.g. two, three, etc., unless explicitly specified otherwise. When a certain technical feature "includes" or "comprises" a certain or certain technical feature(s) encompassed therein, unless otherwise specifically described, this indicates that other technical features can be included and can further include other technical features.

[0041] In the description of the present embodiments, references to "an embodiment", "some embodiments", "certain embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the present disclosure. The appearances of the phrases in various places in the specification are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0042] Figure 1 is a schematic flow chart of a control method of a mobile air conditioner according to an embodiment of the present disclosure, as Figure 1 indicated and with reference to Figures 2 to 3 , the present embodiment provides a control method of a mobile air conditioner, comprising the following steps:

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

[0044] Step S101: judging whether to trigger a high-temperature protection program according to at least the indoor ambient temperature and the indoor coil temperature; the high-temperature protection program comprises at least controlling the outdoor fan to stop and start again. If yes, executing step S102.

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

[0046] Step S103: judging whether to enter a defrosting program according to the outdoor fan and / or the compressor and / or the indoor coil temperature.

[0047] In the present embodiment, the indoor ambient temperature and the indoor coil temperature are obtained every sampling period.

[0048] The present disclosure judges whether to trigger a high-temperature protection program according to at least the indoor ambient temperature and the indoor coil temperature, and judges whether to enter a defrosting program according to the state 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 a defrosting program according to the outdoor fan and / or the compressor and / or the indoor coil temperature comprises the following: ① judging whether to enter a defrosting program according to the state of the outdoor fan, the compressor and the indoor coil temperature; ② judging whether to enter a defrosting program according to the state of the outdoor fan; ③ judging whether to enter a defrosting program according to the state of the outdoor fan and the state of the compressor; ④ judging whether to enter a defrosting program according to the state of the outdoor fan and the state of the indoor coil temperature; ⑤ judging whether to enter a defrosting program according to the state of the compressor and the state of the indoor coil temperature; ⑥ judging whether to enter a defrosting program according to the state of the compressor; ⑦ judging whether to enter a defrosting program according to the state of the indoor coil temperature.

[0050] In the embodiment, the temperature sampling scheme of the application is fine, and a defrost protection logic for the mobile air conditioner of the heat pump type is provided, which is scientific, reasonable and easy to implement. The defrost protection logic can finely protect the scene that the indoor and outdoor unit coil temperatures are close and the coil temperature and the indoor temperature are close, so that the mobile air conditioner of the heat pump type can realize effective defrosting.

[0051] In some embodiments of the application, as shown in Figure 2 The high temperature protection program is triggered according to at least the indoor environment temperature and the indoor coil temperature, including the following steps:

[0052] Step S200: Obtain at least two difference values between the indoor environment temperature and the indoor coil temperature, including a first difference value in time and a second difference value in time.

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

[0054] In the embodiment, the at least two difference values between the indoor environment temperature and the indoor coil temperature, including the first difference value in time and the second difference value in time, are obtained, including: when the number of the difference values between the continuously obtained indoor coil temperature and the indoor environment temperature reaches a first preset number, the difference value between the first indoor coil temperature and the indoor environment temperature is determined as the first difference value, and the difference value between the last indoor coil temperature and the indoor environment temperature is determined as the second difference value.

[0055] The difference values between the indoor coil temperature and the indoor environment temperature obtained every sampling period are stored in the memory of the mobile air conditioner, and the memory stores the first preset number of the difference values between the indoor coil temperature and the indoor environment temperature in the form of 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 environment temperature obtained every sampling period is stored in the memory of the mobile air conditioner. When the number of the differences between the indoor coil temperature and the indoor environment temperature stored in the memory reaches a first preset number, when it is necessary to store the newly obtained difference between the indoor coil temperature and the indoor environment temperature in the memory again, the stored differences are moved in the order of priority in the form of a queue, the difference stored in the memory first is removed from the memory, and the newly obtained difference between the indoor coil temperature and the indoor environment temperature is stored in the memory. The memory always stores the latest first preset number of differences. The first obtained difference between the indoor coil temperature and the indoor environment temperature in the first preset number is a first difference, that is, a first difference in time; the last obtained difference between the indoor coil temperature and the indoor environment temperature in the first preset number is a second difference, that is, a second difference in time. Then, whether the high-temperature protection program is triggered is determined according to the difference between the first difference and the second difference.

[0058] By the control method of the embodiment, the difference between the indoor coil temperature and the indoor environment temperature is stored in the memory in the form of a queue, the memory always stores the latest first preset number of differences, and then whether the high-temperature protection program is triggered is determined according to the difference between the first difference and the second difference in the memory, so that the accuracy of determining whether the high-temperature protection program is triggered is improved.

[0059] In some embodiments of the application, whether the high-temperature protection program is triggered is determined at least according to the difference between the first difference and the second difference, including: whether the high-temperature protection program is triggered is determined according to the size of the difference between the first difference and the second difference and / or the duration of the difference.

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

[0061] By the control method of the embodiment, whether the high-temperature protection program is triggered is determined according to the size of the difference between the first difference and the second difference and / or the duration of the difference, so that the accuracy of determining whether the high-temperature protection program is triggered by the mobile air conditioner is improved.

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

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

[0064] As shown in FIG. 1, according to the size and / or duration of the difference between the first difference and the second difference, it is determined whether to trigger the high-temperature protection procedure, including the following steps: Figure 3

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

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

[0068] In this embodiment, the first execution mode is: according to the size and duration of the difference between the first difference and the second difference, it is determined whether to trigger the first high-temperature protection procedure; when the first high-temperature protection procedure is triggered, the state of the outdoor fan is adjusted and its duration is adjusted, and the state of the outdoor fan is adjusted according to the indoor coil temperature, so as to reduce the temperature of the mobile air conditioner.

[0069] The second execution mode is: according to the relationship between the difference between the first difference and the second difference and the second preset difference, it is determined whether to trigger the second high-temperature protection procedure; when the second high-temperature protection procedure is triggered, the states of the compressor and the outdoor fan are adjusted, and the speed of the indoor fan is adjusted; then, the states of the compressor and the outdoor fan are adjusted according to the shutdown duration of the compressor and the indoor coil temperature, so as to reduce the temperature of the mobile air conditioner.

[0070] ​By the control method of the embodiment, 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; and after the high-temperature protection program is triggered, the first high-temperature protection program or the second high-temperature protection program is selected according to the preset relationship, and then the mobile air conditioner is fine-cooled according to the first high-temperature protection program or the second high-temperature protection program, so as to improve the safety of the mobile air conditioner.

[0071] In some embodiments of the present application, the control method further comprises: adjusting the inner fan rotating speed according to at least the indoor environment temperature and the indoor coil temperature.

[0072] In the embodiment, the first implementation is: on the premise that step S200 has been performed, adjusting the inner fan rotating speed according to the relationship between the difference between the first difference and the second difference and the preset difference.

[0073] The second implementation is: on the premise that step S200 has been performed, adjusting the inner fan rotating speed 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] By the control method of the embodiment, at least the indoor environment temperature and the indoor coil temperature are taken as the judgment conditions for adjusting the inner fan rotating speed, so as to improve the accuracy of adjusting the inner fan rotating speed.

[0075] In some embodiments of the present application, adjusting the inner fan rotating speed according to at least the indoor environment 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, adjusting the inner fan rotating speed 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, adjusting the inner fan rotating speed 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, adjusting the inner fan rotating speed 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] The first preset strategy comprises: controlling the inner fan rotating speed to run at the gear corresponding to the first temperature interval of the indoor coil temperature; the inner fan rotating speed is provided with a plurality of gears, each gear is provided with a corresponding 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.

[0077] According to the second preset strategy, the speed of the indoor fan is adjusted, including: determining the speed of the indoor fan according to the indoor coil temperature, so that the speed of the indoor fan runs at a corresponding gear according to a second temperature interval in which 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 less than the indoor coil temperature corresponding to the second interval, and the gear corresponding to the first interval is less than the gear corresponding to the second interval.

[0078] According to the third preset strategy, the speed of the indoor fan is adjusted, including: first adjusting the speed of the indoor fan to a first gear, and then judging whether the difference between the first difference and the second difference satisfies greater than or equal to a third preset difference and less than a first preset difference, if yes, adjusting the speed of the indoor fan to a second gear, the second gear is greater than the first gear.

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

[0080] Further, 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, at this time, the speed of the indoor fan is adjusted according to the first preset strategy: when the indoor coil temperature is located in the interval [Tpn-1, Tpn), the gear of the indoor fan is adjusted to n-1 speed; when the indoor coil temperature is less than the first preset coil temperature, the indoor fan is stopped; when the indoor coil temperature is greater than or equal to the n preset coil temperature, the gear of the indoor fan is adjusted to n 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 stage falling 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 stopped; when the indoor coil temperature is greater than Tpn-1, the gear of the indoor fan is adjusted to n speed; when the indoor coil temperature is located in the interval (Tpn-2, Tpn-1], the gear of the indoor fan is adjusted to n-1 speed.

[0082] When the difference between the first difference value and the second difference value is greater than or equal to the third preset difference value and less than the first preset difference value, it is determined that Tp is in the phase maintaining state, and the inner fan speed is adjusted according to the third preset strategy: every interval of a period of time, it is determined again whether the difference between the first difference value and the second difference value satisfies greater than or equal to the third preset difference value and less than the first preset difference value; if yes, the gear of the inner fan speed 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 the number of times of cyclically determining whether the difference between the first difference value and the second difference value satisfies greater than or equal to the third preset difference value and less than the first preset difference value, the longer the interval time is.

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

[0084] In the case that the difference between the first difference value and the second difference value is greater than or equal to the first preset difference value, when the first difference value is equal to the second difference value subsequently, the inner fan speed is adjusted according to the third preset strategy. Or, in the case that the difference between the first difference value and the second difference value is greater than or equal to the fourth preset difference value and less than the third preset difference value, when the first difference value is equal to the second difference value subsequently, the inner fan speed is adjusted according to the third preset strategy.

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

[0086] In some embodiments of the application, whether to enter the defrosting program is determined according to the outdoor fan and / or the compressor and / or the indoor coil temperature, including: when the outdoor fan and the compressor satisfy the first preset condition, if the indoor coil temperature is less than or equal to the indoor coil defrosting temperature, the defrosting program is entered.

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

[0088] Preferably, the first preset conditions include the preset condition corresponding to the outdoor fan and the preset condition corresponding to the compressor.

[0089] Through the control method of the embodiment, when the outdoor fan and the compressor both meet the first preset conditions, it is further judged whether the indoor coil temperature and the indoor coil defrosting temperature meet the size relationship, the mobile air conditioner is finely judged whether to defrost, and the accuracy of the mobile air conditioner in judging whether to defrost is improved.

[0090] In some embodiments of the application, the control method further includes: when the first difference is equal to the second difference, the duration is greater than or equal to the second preset time, the outdoor fan continuous running time is greater than or equal to the third preset time, and the compressor cumulative running time is greater than or equal to the fourth preset time, if the indoor coil temperature is less than or equal to the indoor coil defrosting temperature, the defrosting program is entered.

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

[0092] Or, when the compressor cumulative running time is greater than or equal to the sixth preset time and / or the compressor continuous running 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 program is entered. 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 defrosting temperature is a preset indoor coil defrosting temperature threshold value, which can be adjusted according to actual conditions.

[0094] By the control method of the embodiment, the application adopts the technical means of judging whether the compressor and / or the outdoor fan meet the corresponding preset conditions before judging the size relationship between the indoor coil temperature and the indoor coil defrosting temperature, finely judges whether the mobile air conditioner defrosts, and improves the accuracy of the mobile air conditioner defrosting.

[0095] In some embodiments of the application, the defrosting program comprises: closing the indoor fan, the outdoor fan, the compressor and the four-way valve, starting the compressor after the duration of the closed four-way valve reaches the eighth preset time; after the duration of the defrosting program reaches the ninth preset time, closing the compressor, starting the outdoor fan and the indoor fan; after waiting for the tenth preset time, opening the four-way valve; after the duration of the opened four-way valve reaches the eleventh preset time, starting the compressor and exiting the defrosting program.

[0096] Preferably, the starting speed of the indoor fan is the first speed, and the duration of the defrosting 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 environment temperature can be obtained by a temperature detection instrument such as a temperature sensor, 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 defrosting program, the heating mode of the mobile air conditioner does not change, and during the operation of the defrosting program, the indoor coil temperature is not detected, and the indoor coil temperature and the indoor environment temperature are obtained every sampling period after exiting the defrosting program.

[0098] By the control method of the embodiment, the application defrosts by adjusting the states of the indoor fan, the outdoor fan, the compressor and the four-way valve, and sets a suitable duration of the defrosting protection, so as to ensure the defrosting effect of the mobile air conditioner, ensure the heating effect of the mobile air conditioner, and improve the user experience.

[0099] The application also provides a mobile air conditioner, which comprises a controller 50, the controller 50 comprises 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 the control method of any one of the above embodiments when executing the machine executable program 41.

[0100] It is to be appreciated that the logic and / or steps represented in the flow diagrams and / or described herein, for example, can be expressed as a list of executable instructions, and / or as logic in any computer- readable medium for execution by a logic execution system, apparatus, or device, including a computer-based system, processor, or other system that can fetch instructions from a instruction execution system, apparatus, or device and execute the instructions.

[0101] It is to be understood that various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above 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, and as in another embodiment, any of the following technologies known in the art, or a combination thereof, can be used: discrete logic circuitry having logic gates for implementing logic functions on data signals, application specific integrated circuits having appropriate combinational logic gates, programmable gate arrays (PGA), field programmable gate arrays (FPGA), and the like.

[0102] At this point, those skilled in the art will appreciate that although the present application has been described in detail herein with respect to a number of exemplary embodiments, various alterations, modifications, and improvements can be made to the present application in accordance with the disclosure herein, without departing from the spirit and scope of the present application. Accordingly, it is not intended that the present application be limited as described herein, but instead that the present application be construed as including all such alterations, modifications, and improvements as come within the scope and spirit of the present application.

Claims

1. A control method of a mobile air conditioner, characterized by, The method comprises: acquiring an indoor environment temperature and an indoor coil temperature; determining whether to trigger a high-temperature protection program according to at least the indoor environment temperature and the indoor coil temperature; the high-temperature protection program comprises at least controlling an outdoor fan to stop and restart; if yes, running the high-temperature protection program; determining whether to enter a defrosting program according to at least the outdoor fan and / or a compressor and / or the indoor coil temperature; the determining whether to trigger the high-temperature protection program according to at least the indoor environment temperature and the indoor coil temperature comprises: acquiring at least two difference values between the indoor coil temperature and the indoor environment temperature, the at least two difference values comprising a first difference value in an earlier time and a second difference value in a later time; determining whether to trigger the high-temperature protection program according to at least a difference between the first difference value and the second difference value; the determining whether to trigger the high-temperature protection program according to at least the difference between the first difference value and the second difference value comprises: determining whether to trigger the high-temperature protection program according to at least a size and / or a duration of the difference between the first difference value and the second difference value; the high-temperature protection program comprises a first high-temperature protection program and a second high-temperature protection program; the determining whether to trigger the high-temperature protection program according to at least the size and / or the duration of the difference between the first difference value and the second difference value comprises: when the difference between the first difference value and the second difference value is greater than or equal to a first preset difference value and less than a second preset difference value, and the duration is greater than or equal to a first preset time, triggering the first high-temperature protection program; when the difference between the first difference value and the second difference value is greater than or equal to the second preset difference value, triggering the second high-temperature protection program; the first preset difference value is less than the second preset difference value.

2. The control method according to claim 1, wherein the first high-temperature protection program comprises: turning off the outdoor fan, and a stop duration of the outdoor fan is not less than a first preset duration; starting the outdoor fan when the indoor coil temperature is less than or equal to a first preset coil temperature; or starting the outdoor fan when the stop duration of the outdoor fan reaches a second preset duration, and the indoor coil temperature is greater than the first preset coil temperature; the second preset duration is greater than the first preset duration; the second high-temperature protection program comprises: turning off the compressor and the outdoor fan, and adjusting an indoor fan speed according to a third preset strategy; starting the compressor and the outdoor fan when a stop duration of the compressor is greater than or equal to a third preset duration, and the indoor coil temperature is less than or equal to the first preset coil temperature.

3. The control method according to claim 1, characterized by, The method further comprises: adjusting the indoor fan speed according to at least the indoor environment temperature and the indoor coil temperature.

4. The control method according to claim 3, wherein the adjusting the indoor fan speed according to at least the indoor environment temperature and the indoor coil temperature comprises: When the difference between the first difference value and the second difference value is greater than or equal to a first preset difference value, the speed of the inner fan is adjusted according to a first preset strategy; when the difference between the first difference value and the second difference value is greater than or equal to a fourth preset difference value and less than a third preset difference value, the speed of the inner fan is adjusted according to a second preset strategy; when the difference between the first difference value and the second difference value is greater than or equal to the third preset difference value and less than the first preset difference value, the speed of the inner fan is adjusted according to a third preset strategy; the first preset difference value is greater than the third preset difference value, and the third preset difference value is greater than the fourth preset difference value; The method further comprises: controlling the speed of the inner fan to run according to a gear corresponding to a first temperature interval of the indoor coil temperature; wherein the speed of the inner fan is provided with a plurality of gears, each gear is provided with a corresponding first temperature interval of the indoor coil temperature, and the gear corresponding to a first temperature interval with a higher temperature is higher than the gear corresponding to a first temperature interval with a lower temperature; The method further comprises: determining the speed of the inner fan according to the indoor coil temperature, so that the speed of the inner fan runs according to a gear corresponding to a second temperature interval of the indoor coil temperature; the second temperature interval comprises a first interval and a second interval, the indoor coil temperature corresponding to the first interval is less than the indoor coil temperature corresponding to the second interval, and the gear corresponding to the first interval is less than the gear corresponding to the second interval; The method further comprises: first adjusting the speed of the inner fan to a first gear, and then judging whether the difference between the first difference value and the second difference value is greater than or equal to the third preset difference value and less than the first preset difference value, if yes, adjusting the speed of the inner fan to a second gear, the second gear is greater than the first gear.

5. The control method according to claim 1, characterized by, The method further comprises: when the outer fan and the compressor satisfy a first preset condition, if the indoor coil temperature is less than or equal to an indoor coil defrosting temperature, entering a defrosting program.

6. The control method according to claim 1, characterized by The method further comprises: when the first difference value is equal to the second difference value, the duration is greater than or equal to a second preset time, the continuous running time of the outer fan is greater than or equal to a third preset time, and the cumulative running time of the compressor is greater than or equal to a fourth preset time, if the indoor coil temperature is less than or equal to the indoor coil defrosting temperature, entering the defrosting program; or, when the first difference value is equal to the second difference value, the duration is greater than or equal to the second preset time, the continuous running time of the outer fan is greater than or equal to the third preset time, and the continuous running time of the compressor is greater than or equal to a fifth preset time, if the indoor coil temperature is less than or equal to the indoor coil defrosting temperature, entering the defrosting program; or, when the cumulative running time of the compressor is greater than or equal to a sixth preset time and / or the continuous running time of the compressor is greater than or equal to a seventh preset time, if the indoor coil temperature is less than or equal to the indoor coil defrosting temperature, entering the defrosting program. The sixth preset time is greater than the fourth preset time, and the seventh preset time is greater than the fifth preset time.

7. The control method according to claim 1, characterized by, The defrosting program comprises: The inner fan, the outer fan, the compressor and the four-way valve are closed, and after the duration of the closed four-way valve reaches an eighth preset time, the compressor is started; After the duration of the defrosting program reaches a ninth preset time, the compressor is closed, and the outer fan and the inner fan are started; After waiting for a tenth preset time, the four-way valve is opened; After the duration of the opened four-way valve reaches an eleventh preset time, the compressor is started and the defrosting program is exited.

8. A mobile air conditioner characterized by comprising: Comprise: A controller, the controller comprises a memory, a processor and a machine executable program stored on the memory and running on the processor, and the processor implements the control method according to any one of claims 1 to 7 when executing the machine executable program.

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