Control method of air conditioner and air conditioner

Abstract

The present application relates to the air conditioning technical field, particularly to a kind of air conditioner control method and air conditioner.Control method includes: obtaining outdoor environment temperature and / or IPM module temperature;According to outdoor environment temperature and / or IPM module temperature control IPM module carrier frequency, to reduce IPM module temperature.In the control method of the present application, according to outdoor environment temperature and / or IPM module temperature control IPM module carrier frequency, to reduce IPM module operating temperature, protect IPM module in suitable temperature rise.Compared with the way of reducing IPM module temperature by reducing compressor frequency in prior art, the way of reducing IPM module temperature by adjusting IPM module carrier frequency in the present application reduces the influence on air conditioner refrigeration heating effect, solves the problem of indoor environment temperature fluctuation caused by frequent reduction of compressor frequency, thereby improving the user's experience.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air conditioning technology, in particular to a control method of an air conditioner and the air conditioner. BACKGROUND

[0002] When the existing air conditioner runs in a high-temperature working condition, the IPM module (Intelligent Power Module) works at a high switching frequency, and the temperature of the IPM module is in a high-temperature state for a long time, which leads to the shortening of the service life of the IPM module, the increase of the damage rate and other adverse effects. If the IPM module is damaged, it will directly lead to the failure of the air conditioner. In order to avoid the problems caused by the high temperature of the intelligent power module, the following control method for protecting the temperature rise of the IPM module is adopted: the compressor frequency is controlled according to the VOT voltage output by the outdoor module, and when it is detected that the IPM module temperature corresponding to the VOT voltage output by the IPM module is high, the frequency of the compressor is reduced. Although the above control method can control the temperature of the intelligent power module within a suitable range, it will affect the refrigeration and heating effect and reduce the user experience. SUMMARY

[0003] In view of the above problems, the present application is proposed in order to provide a control method of an air conditioner and the air conditioner which overcomes the above problems or at least partially solves the above problems, and aims to solve the problem that the existing control method for protecting the temperature rise of the IPM module easily affects the refrigeration and heating effect of the air conditioner, so as to improve the user experience.

[0004] Specifically, the present application provides a control method of an air conditioner, which comprises:

[0005] obtaining an outdoor environment temperature and / or a temperature of an IPM module;

[0006] controlling a carrier frequency of the IPM module according to the outdoor environment temperature and / or the temperature of the IPM module, so as to reduce the temperature of the IPM module.

[0007] Optionally, the obtaining of the outdoor environment temperature and / or the temperature of the IPM module and the controlling of the carrier frequency of the IPM module according to the outdoor environment temperature and / or the temperature of the IPM module comprise:

[0008] obtaining the outdoor environment temperature before the air conditioner starts;

[0009] determining whether the outdoor environment temperature is greater than or equal to a preset temperature;

[0010] if yes, controlling the IPM module to execute a first carrier frequency;

[0011] if not, controlling the IPM module to execute a second carrier frequency;

[0012] wherein the first carrier frequency is less than the second carrier frequency.

[0013] Optionally, the acquiring the outdoor ambient temperature and / or the temperature of the IPM module, and controlling the carrier frequency of the IPM module according to the outdoor ambient temperature and / or the temperature of the IPM module, further comprises:

[0014] in response to the IPM module executing the second carrier frequency, acquiring the temperature of the IPM module to obtain a first temperature;

[0015] if the first temperature is greater than or equal to a set temperature, controlling the IPM module to execute a third carrier frequency, the third carrier frequency being less than the second carrier frequency.

[0016] Optionally, the third carrier frequency is equal to the first carrier frequency.

[0017] Optionally, the third carrier frequency is greater than the first carrier frequency.

[0018] the acquiring the outdoor ambient temperature and / or the temperature of the IPM module, and controlling the carrier frequency of the IPM module according to the outdoor ambient temperature and / or the temperature of the IPM module, further comprises:

[0019] in response to the IPM module operating at the third carrier frequency for a first preset time, acquiring the temperature of the IPM module to obtain a second temperature;

[0020] in response to the second temperature being greater than or equal to the set temperature, controlling the IPM module to execute the first carrier frequency.

[0021] Optionally, the control method further comprises:

[0022] in response to the IPM module executing the first carrier frequency, acquiring the temperature of the IPM module to obtain a third temperature;

[0023] in response to the third temperature being greater than or equal to the set temperature, controlling the compressor to reduce the frequency.

[0024] the acquiring the outdoor ambient temperature and / or the temperature of the IPM module, and controlling the carrier frequency of the IPM module according to the outdoor ambient temperature and / or the temperature of the IPM module, further comprises:

[0025] in response to the IPM module executing the first carrier frequency, acquiring the temperature of the IPM module to obtain a fourth temperature;

[0026] In response to the fourth temperature being greater than or equal to the set temperature, the IPM module is controlled to execute a fourth carrier frequency, which is less than the first carrier frequency.

[0027] Optionally, the control method further comprises:

[0028] In response to the IPM module operating at the fourth carrier frequency for a second preset time, the temperature of the IPM module is obtained to obtain a fifth temperature.

[0029] It is determined whether the fifth temperature is greater than or equal to the set temperature.

[0030] If yes, the compressor is controlled to reduce the frequency.

[0031] If no, the IPM module is controlled to continue to execute the fourth carrier frequency.

[0032] Optionally, the temperature of the IPM module is obtained by obtaining a VOT voltage output by the IPM module and obtaining the temperature of the IPM module according to the VOT voltage.

[0033] The carrier frequency of the IPM module is controlled according to the outdoor environment temperature and / or the temperature of the IPM module, including that a micro control unit (MCU) controls the carrier frequency of the IPM module according to the received information of the outdoor environment temperature and / or the temperature of the IPM module.

[0034] The application further provides an air conditioner comprising a control device, wherein the control device comprises a memory and a processor, the memory stores a control program, and the control program is executed by the processor to implement the control method of the air conditioner according to any one of the above.

[0035] In the control method, the carrier frequency of the IPM module is controlled according to the outdoor environment temperature and / or the temperature of the IPM module to reduce the working temperature of the IPM module and protect the IPM module at a suitable temperature rise, effectively avoiding the IPM module working at a high temperature for a long time, thereby improving the service life of the IPM module.

[0036] The above and other objects, advantages and features of the application will be more apparent from the following detailed description of specific embodiments thereof, given by way of example only, in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0037] Some specific embodiments of the present application will be described in detail in the following with reference to the attached drawings. The same reference numerals in the drawings indicate the same or similar components or parts. Those skilled in the art should understand that the drawings are not necessarily drawn to scale. In the drawings:

[0038] Figure 1 is a schematic flow chart of a control method of an air conditioner according to an embodiment of the present application;

[0039] Figure 2 is a schematic flow chart of a control method of an air conditioner according to another embodiment of the present application;

[0040] Figure 3 is a schematic flow chart of a control method of an air conditioner according to another embodiment of the present application;

[0041] Figure 4 is a schematic flow chart of a control method of an air conditioner according to another embodiment of the present application. DETAILED DESCRIPTION

[0042] The control method of an air conditioner and the air conditioner according to the embodiments of the present application will be described below with reference to Figures 1 to 4 The terms "front", "back", "up", "down", "top", "bottom", "inner", "outer", "lateral" and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely used for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0043] The terms "first", "second", and the like, are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implying that the indicated technical features are limited to a certain number. Therefore, the features defined with "first", "second", and the like, can explicitly or implicitly include at least one of the features, i.e. one or more of the features. In the description of the present application, the meaning of "plurality" is at least two, for example, two, three, and the like, unless otherwise specifically limited. When a certain feature "includes or comprises" a certain or certain features, unless otherwise specifically described, it indicates that other features are not excluded and can further include other features.

[0044] Unless otherwise defined, the terms "mounting", "connected", "connecting", "fixed", "coupled" or the like are to be construed in accordance with their ordinary meanings, for example, "connected" or "coupled" can be a fixed connection, also can be a detachable connection, or integral; can be mechanical connection, also can be electrical connection; can be direct connection, also can be indirect connection through intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly defined. The person skilled in the art should be able to understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0045] Figure 1 is a schematic flow chart of the control method of the air conditioner of an embodiment of the present application, referring to Figures 2 to 4 The present application provides a control method of an air conditioner, which comprises: step S11, acquiring the outdoor environment temperature and / or the temperature of the IPM module; step S12, controlling the carrier frequency of the IPM module according to the outdoor environment temperature and / or the temperature of the IPM module, so as to reduce the temperature of the IPM module.

[0046] Specifically, the "acquiring the outdoor environment temperature and / or the temperature of the IPM module, and controlling the carrier frequency of the IPM module according to the outdoor environment temperature and / or the temperature of the IPM module" includes the following cases: ① acquiring the temperature of the outdoor environment temperature, and controlling the carrier frequency of the IPM module according to the temperature of the outdoor environment temperature; ② acquiring the outdoor environment temperature and the temperature of the IPM module, and controlling the carrier frequency of the IPM module according to the outdoor environment temperature and the temperature of the IPM module; ③ acquiring the temperature of the IPM module, and controlling the carrier frequency of the IPM module according to the outdoor environment temperature and the temperature of the IPM module.

[0047] The present application controls the carrier frequency of the IPM module according to the outdoor environment temperature and / or the temperature of the IPM module, when the temperature of the IPM module is high and / or the outdoor environment temperature is high, the appropriate carrier frequency can be selected to reduce the temperature of the IPM module, so as to protect the IPM module in the appropriate temperature rise, effectively avoid the IPM in the long-term high-temperature working state, and further improve the service life of the IPM module. In addition, compared with the way of reducing the temperature of the IPM module by reducing the frequency of the compressor in the prior art, the way of reducing the temperature of the IPM module by adjusting the carrier frequency of the IPM module in the present application reduces the influence on the refrigeration and heating effect of the air conditioner, solves the problem of large indoor environment temperature fluctuation caused by frequent reduction of the frequency of the compressor, and improves the user experience.

[0048] As Figure 2As shown, in some optional embodiments of the present invention, the step of obtaining the outdoor ambient temperature and / or the temperature of the IPM module, and controlling the carrier frequency of the IPM module based on the outdoor ambient temperature and / or the temperature of the IPM module, includes the following steps:

[0049] Step S21: Before the air conditioner is started, the outdoor ambient temperature is obtained.

[0050] Step S22: Determine whether the outdoor ambient temperature is greater than or equal to the preset temperature.

[0051] Step S23: If yes, control the IPM module to execute the first carrier frequency; if no, control the IPM module to execute the second carrier frequency; wherein the first carrier frequency is less than the second carrier frequency.

[0052] Specifically, before the air conditioner is turned on, the outdoor ambient temperature is obtained; and the outdoor ambient temperature is compared with the preset temperature: if the outdoor ambient temperature is greater than or equal to the preset temperature, the IPM module is controlled to execute the first carrier frequency; if the outdoor ambient temperature is less than the preset temperature, the IPM module is controlled to execute the second carrier frequency.

[0053] In other words, if the outdoor ambient temperature is greater than or equal to the preset temperature before the air conditioner is turned on, when the air conditioner is turned on and operating at high temperatures, the IPM module is controlled to execute a first carrier frequency (i.e., a relatively low carrier frequency). At this lower switching frequency, the IPM module's temperature remains at a suitable operating temperature, effectively preventing excessive temperature rise in the IPM module. Furthermore, this invention solves the problem of large fluctuations in indoor ambient temperature caused by frequent reductions in compressor frequency, thereby improving the user experience.

[0054] Preferably, in this embodiment, the preset temperature is 35°C, the first carrier frequency is 4kHz, and the second carrier frequency is 6.25kHz. In some alternative embodiments, the preset temperature is 33°C, the first carrier frequency is 4.5kHz, and the second carrier frequency is 6.5kHz.

[0055] like Figure 3 As shown, in some optional embodiments of the present invention, the step of obtaining the outdoor ambient temperature and / or the temperature of the IPM module, and controlling the carrier frequency of the IPM module based on the outdoor ambient temperature and / or the temperature of the IPM module, includes the following steps:

[0056] Step S31: Before the air conditioner is started, the outdoor ambient temperature is obtained.

[0057] Step S32: Determine whether the outdoor ambient temperature is greater than or equal to the preset temperature.

[0058] If yes, controlling the IPM module to execute a first carrier frequency; if no, controlling the IPM module to execute a second carrier frequency; wherein the first carrier frequency is less than the second carrier frequency.

[0059] In response to the IPM module executing the second carrier frequency, obtaining a temperature of the IPM module to obtain a first temperature; if the first temperature is greater than or equal to a set temperature, controlling the IPM module to execute a third carrier frequency, wherein the third carrier frequency is less than the second carrier frequency.

[0060] Specifically, "in response to the IPM module executing the second carrier frequency" means that when the IPM module executes the second carrier frequency.

[0061] In the embodiment, before the air conditioner is started, an outdoor environment temperature is obtained; and the outdoor environment temperature is compared with a preset temperature: if the outdoor environment temperature is greater than or equal to the preset temperature, the IPM module is controlled to execute the first carrier frequency; if the outdoor environment temperature is less than the preset temperature, the IPM module is controlled to execute the second carrier frequency. When the IPM module executes the second carrier frequency, if the first temperature is greater than or equal to the set temperature, the IPM module is controlled to execute the third carrier frequency, so as to reduce the carrier frequency of the IPM module, and the IPM module gradually drops to a suitable working temperature under a lower switching frequency.

[0062] That is to say, when the outdoor environment temperature is less than the preset temperature and the IPM module executes the second carrier frequency, if the temperature of the IPM module is greater than or equal to the set temperature, the carrier frequency of the IPM module needs to be reduced at this time, so as to reduce the switching frequency of the IPM module, thereby reducing the temperature of the IPM module.

[0063] Further, in some embodiments of the present application, the third carrier frequency is equal to the first carrier frequency. In some alternative embodiments, the third carrier frequency is greater than the first carrier frequency.

[0064] In some optional embodiments of the present application, after step S34, the obtaining of the outdoor environment temperature and / or the temperature of the IPM module and the controlling of the carrier frequency of the IPM module according to the outdoor environment temperature and / or the temperature of the IPM module further comprises the following steps: in response to the IPM module running at the third carrier frequency for a first preset time, obtaining the temperature of the IPM module to obtain a second temperature; in response to the second temperature being greater than or equal to the set temperature, controlling the IPM module to execute the first carrier frequency, wherein the third carrier frequency is greater than the first carrier frequency.

[0065] Specifically, after step S34, if the IPM module runs at the third carrier frequency for a first preset time, the temperature of the IPM module is compared with the set temperature. If the temperature of the IPM module is greater than or equal to the set temperature, it indicates that the IPM module fails to effectively reduce the temperature of the IPM module when executing the third carrier frequency. At this time, the carrier frequency of the IPM module needs to be further reduced (controlled to execute the first carrier frequency) to further reduce the switching frequency of the IPM module, so as to reduce the temperature of the IPM module.

[0066] In some optional embodiments of the present application, the control method further comprises: in response to the IPM module executing the first carrier frequency, acquiring the temperature of the IPM module to obtain a third temperature; and in response to the third temperature being greater than or equal to the set temperature, controlling the compressor to reduce the frequency.

[0067] Specifically, when the IPM module executes the first carrier frequency, if the temperature of the IPM module is still greater than or equal to the set temperature, at this time, the temperature of the IPM module needs to be reduced by reducing the frequency of the compressor to ensure that the temperature rise of the IPM module is appropriate.

[0068] In some optional embodiments of the present application, the acquiring of the outdoor environment temperature and / or the temperature of the IPM module and the controlling of the carrier frequency of the IPM module according to the outdoor environment temperature and / or the temperature of the IPM module further comprises: in response to the IPM module executing the first carrier frequency, acquiring the temperature of the IPM module to obtain a fourth temperature; and in response to the fourth temperature being greater than or equal to the set temperature, controlling the IPM module to execute a fourth carrier frequency, the fourth carrier frequency being less than the first carrier frequency.

[0069] Specifically, when the IPM module executes the first carrier frequency, if the temperature of the IPM module is still greater than or equal to the set temperature, at this time, the carrier frequency of the IPM module needs to be further reduced, that is, controlled to execute the fourth carrier frequency, to further reduce the switching frequency of the IPM module, so as to reduce the temperature of the IPM module. In this embodiment, by the above method, the temperature of the IPM module can be further delayed or protected from being reduced by reducing the frequency of the compressor.

[0070] Preferably, in some optional embodiments of the present application, the control method further comprises: in response to the IPM module running at the fourth carrier frequency for a second preset time, acquiring the temperature of the IPM module to obtain a fifth temperature; determining whether the fifth temperature is greater than or equal to the set temperature; if yes, controlling the compressor to reduce the frequency; and if no, controlling the IPM module to continue to execute the fourth carrier frequency.

[0071] Specifically, when the IPM module executes the fourth carrier frequency, if the temperature of the IPM module is still greater than or equal to the set temperature, the temperature of the IPM module needs to be reduced by reducing the frequency of the compressor to ensure that the temperature rise of the IPM module is appropriate.

[0072] In some optional embodiments of the present application, the temperature of the IPM module is obtained by obtaining a VOT (Voltage) voltage output by the IPM module and obtaining the temperature of the IPM module according to the VOT voltage.

[0073] In some optional embodiments of the present application, the carrier frequency of the IPM module is controlled according to the outdoor ambient temperature and / or the temperature of the IPM module by the microcontroller unit MCU (Microcontroller Unit) according to the received information of the outdoor ambient temperature and / or the temperature of the IPM module.

[0074] Specifically, the carrier frequency of the IPM module is controlled by the microcontroller unit MCU according to the received information. The information includes the outdoor ambient temperature, or the temperature of the IPM module, or the outdoor ambient temperature and the temperature of the IPM module.

[0075] In some optional embodiments of the present application, the IPM module is composed of a plurality of IGBT (Insulated Gate Bipolar Transistor) modules. The IGBT module is a modularized semiconductor product formed by bridging and packaging IGBT (Insulated Gate Bipolar Transistor chip) and FWD (free-wheeling diode chip) through a specific circuit.

[0076] As shown in FIG. 1, Figure 4 The control method of the air conditioner includes the following steps:

[0077] In step S41, the outdoor ambient temperature is obtained before the air conditioner is started.

[0078] In step S42, it is determined whether the outdoor ambient temperature is greater than or equal to a preset temperature.

[0079] In step S43, if yes, the IPM module is controlled to execute a first carrier frequency; if no, the IPM module is controlled to execute a second carrier frequency; wherein the first carrier frequency is less than the second carrier frequency.

[0080] In step S44, when the IPM module executes the second carrier frequency, the temperature of the IPM module is obtained to obtain a first temperature; if the first temperature is greater than or equal to a set temperature, the IPM module is controlled to execute the first carrier frequency.

[0081] Step S45, when the IPM module executes the first carrier frequency, the temperature of the IPM module is acquired, and a third temperature is obtained; when the third temperature is greater than or equal to the set temperature, the compressor is controlled to reduce the frequency.

[0082] In the embodiment, the preset temperature corresponding to the outdoor environment temperature is 35℃, the set temperature corresponding to the IPM module is 80℃, the first carrier frequency is 4KHz, and the second carrier frequency is 6.5KHz.

[0083] The application further provides an air conditioner, which comprises a control device. The control device comprises a memory and a processor, and the memory stores a control program. When the control program is executed by the processor, the control method of the air conditioner according to any one of the above embodiments is implemented.

[0084] At this point, those skilled in the art should recognize that, although the application has been fully shown and described herein with reference to a plurality of exemplary embodiments, many other variations or modifications in accordance with the principles of the application can be directly determined or deduced from the disclosure of the application without departing from the spirit and scope of the application. Therefore, the scope of the application should be understood and recognized as covering all these other variations or modifications.

Claims

1. A control method for an air conditioner, characterized in that, The control method includes: Obtain the outdoor ambient temperature and / or the temperature of the IPM module; The carrier frequency of the IPM module is controlled according to the outdoor ambient temperature and / or the temperature of the IPM module in order to reduce the temperature of the IPM module. The method of acquiring the outdoor ambient temperature and / or the temperature of the IPM module, and controlling the carrier frequency of the IPM module based on the outdoor ambient temperature and / or the temperature of the IPM module, includes: Before the air conditioner is started, the outdoor ambient temperature is obtained; Determine whether the outdoor ambient temperature is greater than or equal to the preset temperature; If so, control the IPM module to execute the first carrier frequency; If not, control the IPM module to execute the second carrier frequency; Wherein, the first carrier frequency is less than the second carrier frequency; In response to the IPM module executing the second carrier frequency, the temperature of the IPM module is obtained to obtain a first temperature; If the first temperature is greater than or equal to the set temperature, the IPM module is controlled to execute a third carrier frequency, which is less than the second carrier frequency. The third carrier frequency is greater than the first carrier frequency; In response to the IPM module operating at the third carrier frequency for a first preset time, the temperature of the IPM module is obtained, and a second temperature is obtained; In response to the second temperature being greater than or equal to the set temperature, the IPM module is controlled to execute the first carrier frequency.

2. The control method for an air conditioner according to claim 1, characterized in that, The control method further includes: In response to the IPM module executing the first carrier frequency, the temperature of the IPM module is obtained, and a third temperature is obtained; In response to the third temperature being greater than or equal to the set temperature, the compressor is controlled to reduce its frequency.

3. The control method for an air conditioner according to claim 1, characterized in that, The method of acquiring the outdoor ambient temperature and / or the temperature of the IPM module, and controlling the carrier frequency of the IPM module based on the outdoor ambient temperature and / or the temperature of the IPM module, further includes: In response to the IPM module executing the first carrier frequency, the temperature of the IPM module is obtained to obtain a fourth temperature; In response to the fourth temperature being greater than or equal to a set temperature, the IPM module is controlled to execute a fourth carrier frequency, which is less than the first carrier frequency.

4. The control method for an air conditioner according to claim 3, characterized in that: The control method further includes: In response to the IPM module operating at the fourth carrier frequency for a second preset time, the temperature of the IPM module is obtained, and a fifth temperature is obtained; Determine whether the fifth temperature is greater than or equal to the set temperature; If so, then control the compressor to reduce its frequency; If not, then control the IPM module to continue executing the fourth carrier frequency.

5. The control method for an air conditioner according to claim 1, characterized in that: The method for obtaining the temperature of the IPM module includes: obtaining the VOT voltage output by the IPM module; and obtaining the corresponding temperature of the IPM module based on the VOT voltage. The method of controlling the carrier frequency of the IPM module based on the outdoor ambient temperature and / or the temperature of the IPM module includes: the microcontroller unit (MCU) controlling the carrier frequency of the IPM module based on the received information of the outdoor ambient temperature and / or the temperature of the IPM module.

6. An air conditioner, characterized in that, The device includes a control unit, which comprises a memory and a processor. The memory stores a control program, which, when executed by the processor, is used to implement the control method for an air conditioner as described in any one of claims 1 to 5.

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