An air conditioner

Abstract

This invention discloses an air conditioner, including a compressor (which is an inverter type); it also includes a drive module, a temperature detection unit, and a controller; the drive module is connected to the compressor and is used to drive the compressor to operate; the temperature detection unit is connected to the drive module and is used to detect the temperature of the drive module, which is recorded as the operating temperature; the controller is connected to both the drive module and the temperature detection unit, configured with a temperature threshold, and configured to cyclically acquire the operating temperature; compare the operating temperature with the temperature threshold; determine whether the operating temperature reaches or exceeds the temperature threshold; if so, reduce the control frequency of the compressor. This invention limits the temperature rise of the drive module by adjusting the compressor's control frequency, reducing the requirements for heat dissipation devices, reducing the cost of using DC motors, thereby reducing the cost of the air conditioner, and improving the safety and reliability of the air conditioner's operation.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically to an air conditioner. Background Technology

[0002] The maximum operating temperature of the DC motor with built-in drive is as high as 100℃. In order to ensure the stability and reliability of the DC motor, the rated power needs to be increased, resulting in a higher application price and seriously affecting the promotion and application of DC motors in central air conditioning.

[0003] Externalizing the driver can lower the operating temperature, reduce component specifications, and decrease driver cost. However, the driver circuit still suffers from high inverter losses and high temperatures in power devices, leading to increased temperature rise in the electrical box and consequently higher failure rates of electronic components. Using heat sinks for cooling not only increases the cost of the DC fan drive platform but also adds production steps and reduces production efficiency.

[0004] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0005] In response to the problems of electrical box failure and high operating costs caused by DC motor inverter temperature rise mentioned in the background art, this invention proposes an air conditioner that reduces temperature rise by adjusting the control frequency when the temperature rise exceeds the standard, thereby reducing costs and improving operational safety and reliability.

[0006] To achieve the above-mentioned objectives, the present invention employs the following technical solution: An air conditioner includes a compressor, which is an inverter type; it also includes a drive module, a temperature detection unit, and a controller; The drive module is connected to the compressor and is used to drive the compressor to operate; The temperature detection unit is connected to the drive module and is used to detect the temperature of the drive module, which is recorded as the operating temperature. The controller is connected to the drive module and the temperature detection unit respectively, and is configured with a temperature threshold, and configured as follows: The operating temperature is obtained cyclically; Compare the operating temperature with the temperature threshold; determine whether the operating temperature exceeds the temperature threshold; if so, reduce the control frequency of the compressor.

[0007] The air conditioner of the present invention changes the switching frequency of the drive module by controlling the control frequency of the compressor without changing the duty cycle, thereby reducing the heat generation power of the drive module and lowering the operating temperature of the drive module. This not only reduces costs by reducing heat dissipation components but also improves the temperature rise guarantee of the drive module, thereby improving the stability and reliability of the drive module and extending its lifespan.

[0008] In some specific embodiments, the controller is also configured to control the operating frequency of the compressor; The controller has a preset proportional threshold, which is greater than 1, and is configured such that the control frequency is not lower than the product of the proportional threshold and the operating frequency.

[0009] In this embodiment, the air conditioner uses a set proportional threshold to ensure that the control frequency is not lower than the product of the proportional threshold and the compressor's operating frequency, thereby making the compressor operate reliably and reducing compressor operating noise.

[0010] In some specific embodiments, the value of the ratio threshold is not less than 15.

[0011] The air conditioner in this embodiment has been experimentally verified to have a proportional threshold value of not less than 15, ensuring that the operating noise of the compressor is lower than required. This not only ensures the operating condition of the compressor, improves reliability and extends its lifespan, but also enhances the user experience by reducing operating noise.

[0012] An air conditioner includes an outdoor unit, which includes a fan; the fan is an inverter type; the outdoor unit also includes a drive module, a temperature detection unit, and a controller; The drive module is connected to the fan and is used to drive the fan to operate; The temperature detection unit is connected to the drive module and is used to detect the temperature of the drive module, which is recorded as the operating temperature. The controller is connected to the drive module and the temperature detection unit respectively, and is configured with a temperature threshold, and configured as follows: The operating temperature is obtained cyclically; Compare the operating temperature with the temperature threshold; determine whether the operating temperature exceeds the temperature threshold; if so, reduce the control frequency of the fan.

[0013] The air conditioner of the present invention reduces the heat generation power of the drive module by controlling the control frequency of the fan without changing the duty cycle. This reduces the operating temperature of the drive module by reducing the heat generation power, thereby reducing the cost by reducing the number of heat dissipation components for the drive module and improving the temperature rise guarantee of the drive module. In turn, it improves the stability and reliability of the drive module and extends its lifespan.

[0014] In some specific embodiments, the outdoor unit further includes a current detection unit connected to the drive module for detecting drive current; The controller is connected to the current detection unit and is also configured with a current threshold, which is configured as follows: The operating temperature and the drive current are obtained cyclically. Determine whether the operating temperature exceeds the temperature threshold; if so, compare the drive current with the current threshold. Determine whether the drive current exceeds the current threshold; if so, reduce the control frequency of the fan; if not, increase the speed of the fan.

[0015] In this embodiment, the air conditioner determines whether the drive current of the fan has reached its upper limit by using a current threshold. If the current threshold has not been reached, the airflow can be increased by increasing the fan speed, thereby enhancing the air cooling of the drive module and reducing its operating temperature, ensuring the reliable and stable operation of the fan. When the current threshold is reached or exceeded, the operating temperature of the drive module is reduced by changing the fan control frequency, sacrificing some noise reduction performance to ensure operating temperature and reduce costs.

[0016] In some specific embodiments, the controller is also configured to control the operating frequency of the fan; The controller has a preset proportional threshold, which is greater than 1, and is configured such that the control frequency is not lower than the product of the proportional threshold and the operating frequency.

[0017] In this embodiment, the air conditioner uses a set proportional threshold to ensure that the control frequency is not lower than the product of the proportional threshold and the fan's operating frequency, thereby ensuring reliable fan operation and reducing fan noise.

[0018] In some specific embodiments, the value of the ratio threshold is not less than 15.

[0019] The air conditioner in this embodiment has been experimentally verified to have a proportional threshold value of not less than 15, ensuring that the operating noise of the fan is below the requirement. This not only ensures the operating condition of the fan, improves reliability and extends its lifespan, but also enhances the user experience by reducing operating noise.

[0020] An air conditioner includes an outdoor unit, which includes a compressor and a fan; the compressor and the fan are inverter type; the outdoor unit also includes a first drive module, a second drive module, a first temperature detection unit, a second temperature detection unit, a current detection unit, and a controller; The first drive module is connected to the compressor and is used to drive the compressor to operate; The second drive module is connected to the fan and is used to drive the fan to operate; The first temperature detection unit is connected to the first drive module and is used to detect the temperature of the first drive module, which is recorded as the first operating temperature. The second temperature detection unit is connected to the second drive module and is used to detect the temperature of the second drive module, which is recorded as the second operating temperature. The current detection unit is connected to the second drive module and is used to detect the drive current; The controller is connected to the first drive module, the second drive module, the first temperature detection unit, the second temperature detection unit, and the current detection unit, respectively, and is configured with a current threshold and a temperature threshold, and configured as follows: The first operating temperature, the second operating temperature, and the driving current are obtained cyclically. Determine whether the first operating temperature and / or the second operating temperature exceed the temperature threshold; if so, compare the drive current with the current threshold. Determine whether the drive current exceeds the current threshold; if yes, reduce the first control frequency of the first drive module and / or the second control frequency of the second drive module; if no, control to increase the fan speed.

[0021] The air conditioner of the present invention reduces the heat generation power of the drive module by controlling the control frequency of the compressor and / or fan without changing the duty cycle, thereby reducing the operating temperature of the drive module. This not only reduces costs by reducing the number of heat dissipation components for the drive module, but also improves the temperature rise guarantee of the drive module, thereby improving the stability and reliability of the drive module and extending its lifespan.

[0022] In some specific embodiments, the controller is further configured to control a first operating frequency of the compressor and a second operating frequency of the fan; The controller has a preset proportional threshold, which is greater than 1, and is configured such that the first control frequency is not lower than the product of the proportional threshold and the first operating frequency; and the second control frequency is not lower than the product of the proportional threshold and the second operating frequency.

[0023] In this embodiment, the air conditioner sets a limiting relationship between a first control frequency and a first operating frequency, and a limiting relationship between a second control frequency and a second operating frequency to ensure the quality of the power supply.

[0024] In some specific embodiments, the value of the ratio threshold is not less than 15.

[0025] The air conditioner in this embodiment has been experimentally verified to have a proportional threshold value of not less than 15, ensuring that the operating noise of the compressor and fan is lower than required. This not only ensures the operating status of the compressor and fan, improves reliability and extends lifespan, but also enhances the user experience by reducing operating noise.

[0026] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the air conditioner's components and connection structure according to an embodiment; Figure 2 This is a schematic diagram of the control flow of an air conditioner according to an embodiment; Figure 3 This is a schematic diagram of the control flow of an air conditioner according to an embodiment; Figure 4 This is a schematic diagram of the air conditioner's components and connection structure according to an embodiment; Figure 5 This is a schematic diagram of the control flow of an air conditioner according to an embodiment; Figure 6 This is a schematic diagram of the control flow of an air conditioner according to an embodiment; Figure 7 This is a schematic diagram of the air conditioner's components and connection structure according to an embodiment; Figure 8 This is a schematic diagram of the control flow of an air conditioner according to an embodiment; Figure 9 This is a schematic diagram of the control flow of an air conditioner according to an embodiment; Figure 10 This is a schematic diagram of the air conditioner's components and connection structure according to an embodiment; Figure 11 This is a schematic diagram of the control flow of an air conditioner according to an embodiment; Figure 12 This is a schematic diagram of the control flow of an air conditioner according to an embodiment; Figure 13 This is a schematic diagram of the air conditioner's components and connection structure according to an embodiment; Figure 14 This is a schematic diagram of the control flow of an air conditioner according to an embodiment; Figure 15This is a schematic diagram of the control flow of an air conditioner according to an embodiment.

[0029] Figure label, 1. Controller; 2. Drive module; 3. Compressor; 4. Temperature detection unit; 5. Fan; 6. Current detection unit; 21. First drive module; 22. Second drive module; 41. First temperature detection unit; 42. Second temperature detection unit. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0032] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0036] Air conditioners execute a refrigeration cycle using a compressor, condenser, expansion valve, and evaporator. The refrigeration cycle involves a series of processes, including compression, condensation, expansion, and evaporation, to cool or heat an indoor space.

[0037] Low-temperature, low-pressure refrigerant enters the compressor, which compresses it into a high-temperature, high-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0038] The expansion valve expands the high-temperature, high-pressure liquid refrigerant that condenses in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the expanded refrigerant in the expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves its cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioner regulates the temperature of the indoor space.

[0039] The outdoor unit of an air conditioner refers to the part of the refrigeration cycle that includes the compressor and the outdoor heat exchanger. The indoor unit of an air conditioner includes the indoor heat exchanger, and an expansion valve can be provided in either the indoor or outdoor unit.

[0040] The indoor and outdoor heat exchangers function as either condensers or evaporators. When the indoor heat exchanger is used as a condenser, the air conditioner functions as a heater in heating mode; when the indoor heat exchanger is used as an evaporator, the air conditioner functions as a cooler in cooling mode.

[0041] Reference Figure 1 , Figure 2 The air conditioner of the present invention includes a compressor 3, which is a variable frequency type; that is, the air conditioner includes an outdoor unit; the outdoor unit includes a compressor 3, which is a variable frequency type compressor; that is, the air conditioner of the present invention is a variable frequency air conditioner.

[0042] The air conditioner also includes a drive module 2 and a controller 1. The drive module 2 is connected to the compressor 3 and the controller 1 respectively. The controller 1 controls the duty cycle of the switch of the drive module 2, thereby controlling the amplitude and frequency of the output power supply to supply power to the compressor 3.

[0043] The air conditioner also includes a temperature detection unit 4, which is connected to the drive module 2 and electrically connected to the controller 1, for detecting the operating temperature of the drive module 2 and transmitting it to the controller 1.

[0044] Controller 1 has a preset temperature threshold and is configured as follows: S1. Cyclicly obtain the operating temperature of drive module 2; S2. Compare the operating temperature with the temperature threshold and determine whether the operating temperature has reached or exceeded the temperature threshold; if so, proceed to S3. S3, reduce the control frequency of compressor 3.

[0045] The control frequency of compressor 3 is the frequency of switching of the switching components of drive module 2; that is, one cycle of the power supply includes the number of switching cycles of drive module 2; the duty cycle of the switch is used to control the voltage and current of the power supply; the number of switches and the switching frequency are used to control the power supply quality.

[0046] The air conditioner of the present invention changes the switching frequency of the drive module 2 by controlling the control frequency of the compressor 3 without changing the duty cycle, thereby reducing the heat generation power of the drive module 2 and thus reducing the operating temperature of the drive module 2. This not only reduces costs by reducing heat dissipation components, but also improves the temperature rise guarantee of the drive module 2, thereby improving the stability and reliability of the drive module 2 and extending its lifespan.

[0047] The specific structure, control process, and principle of the air conditioner of the present invention will be described in detail below through specific embodiments.

[0048] In some specific embodiments, refer to Figure 1 , Figure 2 , Figure 3The controller 1 has a preset proportional threshold, which is greater than 1, and is configured to control the operating frequency of the compressor 3, and the control frequency is limited according to the product of the proportional threshold and the operating frequency.

[0049] The specific control process is as follows: S1. Obtain the operating temperature of drive module 2; S2. Compare the operating temperature with the temperature threshold to determine whether the operating temperature has reached or exceeded the temperature threshold. If the operating temperature has reached or exceeded the temperature threshold, execute S4. S4. Obtain the operating frequency of compressor 3; compare the control frequency with the product of the proportional threshold and the operating frequency; determine whether the control frequency is not lower than the product of the proportional threshold and the operating frequency; if yes, execute S3; if no, execute S5. S3. Reduce the control frequency for controlling the operation of compressor 3; S5, Alarm; This is an alarm indicating a temperature control failure.

[0050] In this embodiment, the air conditioner uses a set proportional threshold to ensure that the control frequency is not lower than the product of the proportional threshold and the operating frequency of the compressor 3, thereby making the compressor 3 operate reliably and reducing the operating noise of the compressor 3.

[0051] In some specific embodiments, the value of the ratio threshold is not less than 15.

[0052] The air conditioner in this embodiment has been experimentally verified to have a proportional threshold value of not less than 15, ensuring that the operating noise of the compressor 3 is lower than required. This not only ensures the operating condition of the compressor 3, improves its reliability and extends its lifespan, but also enhances the user experience by reducing operating noise.

[0053] Reference Figure 4 , Figure 5 , Figure 6 The present invention also discloses an air conditioner, which includes a fan 5; the fan 5 is a variable frequency type. That is, the air conditioner includes an outdoor unit; the outdoor unit includes the fan 5 and an outdoor heat exchanger; the fan 5 is a variable frequency type, which can control and change its speed, and is used to control the heat exchange efficiency of the outdoor heat exchanger according to the cooling or heating load.

[0054] The air conditioner also includes a drive module 2 and a controller 1. The drive module 2 is connected to the fan 5 and the controller 1 respectively. The controller 1 controls the duty cycle of its switch and outputs power to supply power to the fan 5.

[0055] The air conditioner also includes a temperature detection unit 4, which is connected to the drive module 2 and is used to detect the operating temperature of the drive module 2; the temperature detection unit 4 is connected to the controller 1 and transmits the detected operating temperature of the drive module 2 to the controller 1.

[0056] Controller 1 has a preset temperature threshold and is configured as follows: S1', cyclically obtain the operating temperature of drive module 2; S2': Compare the operating temperature with the temperature threshold and determine whether the operating temperature has reached or exceeded the temperature threshold; if so, execute S3'. S3', Reduce the control frequency of fan 5.

[0057] Similarly, the control frequency of the fan 5 is the frequency of the switching of the switching components of the drive module 2; that is, one cycle of the power supply includes the number of switching cycles of the drive module 2; the duty cycle of the switch is used to control the voltage and current of the power supply; the number of switches and the switching frequency are used to control the power supply quality.

[0058] The air conditioner of the present invention changes the switching frequency of the drive module 2 by controlling the control frequency of the fan 5 without changing the duty cycle, thereby reducing the heat generation power of the drive module 2 and thus reducing the operating temperature of the drive module 2. This not only reduces costs by reducing the number of heat dissipation components for the drive module 2, but also improves the temperature rise guarantee of the drive module 2, thereby improving the stability and reliability of the drive module 2 and extending its lifespan.

[0059] The specific structure, control process, and principle of the air conditioner of the present invention will be described in detail below through specific embodiments.

[0060] In some specific embodiments, refer to Figure 4 , Figure 5 , Figure 6 The controller 1 has a preset proportional threshold, which is greater than 1, and is configured to control the operating frequency of the fan 5, and limits the control frequency according to the product of the proportional threshold and the operating frequency.

[0061] The specific control process is as follows: S1', Obtain the operating temperature of drive module 2; S2': Compare the operating temperature with the temperature threshold to determine whether the operating temperature has reached or exceeded the temperature threshold. If the operating temperature has reached or exceeded the temperature threshold, execute S4'. S4': Obtain the operating frequency of fan 5; compare the product of control frequency and proportional threshold with operating frequency; determine whether control frequency is not lower than the product of proportional threshold and operating frequency; if yes, execute S3'; if no, execute S5'. S3', Reduce the control frequency for controlling the operation of fan 5; S5', Alarm; that is, to trigger an alarm for temperature control failure.

[0062] In this embodiment, the air conditioner uses a set proportional threshold to ensure that the control frequency is not lower than the product of the proportional threshold and the operating frequency of the fan 5, thereby making the fan 5 operate reliably and reducing the operating noise of the fan 5.

[0063] In some specific embodiments, the value of the ratio threshold is not less than 15.

[0064] The air conditioner in this embodiment has been experimentally verified to have a proportional threshold value of not less than 15, ensuring that the operating noise of the fan 5 is below the requirement. This not only ensures the operating status of the fan 5, improves reliability and extends its lifespan, but also enhances the user experience by reducing operating noise.

[0065] In some specific embodiments, refer to Figure 7 , Figure 8 , Figure 9 The air conditioner of the present invention also includes a current detection unit 6, which is connected to the drive module 2 and the controller 1 respectively, and is used to detect the drive current of the drive module 2 and transmit it to the controller 1.

[0066] Controller 1 has preset temperature thresholds and current thresholds, and is configured as follows: S10. Cyclicly acquire the operating temperature and drive current of drive module 2; S20. Compare the operating temperature with the temperature threshold; determine whether the operating temperature has reached or exceeded the temperature threshold; if yes, execute S30. S30. Compare the drive current with the current threshold; determine whether the drive current reaches or exceeds the current threshold; if yes, execute S40; if no, execute S50. S40. Reduce the control frequency of the power supply for controlling fan 5; S50, increases the speed of fan 5; used to increase airflow and enhance the air-cooling heat dissipation of drive module 2.

[0067] In this embodiment, the air conditioner determines whether the drive current of the fan 5 has reached its upper limit by using a current threshold. If the current threshold has not been reached, the airflow can be increased by increasing the speed of the fan 5, thereby enhancing the air cooling of the drive module 2 and reducing its operating temperature, thus ensuring the reliable and stable operation of the fan 5. When the current threshold is reached or exceeded, the operating temperature of the drive module 2 is reduced by changing the control frequency of the fan 5, sacrificing some noise reduction performance to ensure operating temperature and reduce costs.

[0068] In some specific embodiments, refer to Figure 7 , Figure 8 , Figure 9 Controller 1 is also configured as follows: S10. Cyclicly acquire the operating temperature and drive current of drive module 2; S20. Compare the operating temperature with the temperature threshold; determine whether the operating temperature has reached or exceeded the temperature threshold; if yes, execute S30. S30. Compare the drive current with the current threshold; determine whether the drive current reaches or exceeds the current threshold; if yes, execute S60; if no, execute S50. S60. Obtain the operating frequency of fan 5; compare the control frequency of fan 5 with the product of the proportional threshold and the operating frequency; determine whether the control frequency of fan 5 is not lower than the product of the proportional threshold and the operating frequency; if yes, execute S40; if no, execute S70. S40. Reduce the control frequency of the power supply for controlling fan 5; S50, Increase the speed of fan 5; Used to increase airflow and enhance the air-cooling heat dissipation of drive module 2; S70, trigger a temperature control failure alarm.

[0069] In this embodiment, the air conditioner uses a set proportional threshold to ensure that the control frequency is not lower than the product of the proportional threshold and the operating frequency of the fan 5, thereby making the fan 5 operate reliably and reducing the operating noise of the fan 5.

[0070] In some specific embodiments, the current threshold is calculated using the temperature threshold and the power dissipation of the drive module 2. That is, the power dissipation of the drive module 2 meets the temperature rise rate of the drive module 2, so that its operating temperature is lower than the temperature threshold.

[0071] In this embodiment, the air conditioner adds a current threshold judgment to ensure that the operating temperature does not exceed the temperature threshold during normal operation, thereby ensuring the normal operating temperature rise of the fan 5 and improving the stability and reliability of the fan 5 operation.

[0072] Reference Figure 10 , Figure 11 , Figure 12 The present invention also discloses an air conditioner, which includes an outdoor unit; the outdoor unit includes a compressor 3 and a fan 5; both the compressor 3 and the fan 5 are variable frequency type; that is, the air conditioner is a variable frequency air conditioner.

[0073] The outdoor unit also includes a first drive module 21, a second drive module 22, a first temperature detection unit 41, a second temperature detection unit 42, and a controller 1.

[0074] The first drive module 21 is connected to the compressor 3 and the controller 1 respectively. The controller 1 controls the change of the duty cycle of the first drive module 21, thereby changing the frequency of the power supply and causing the compressor 3 to operate at a variable frequency. That is, the controller 1 controls the compressor 3 to change its operating frequency by controlling the first drive module 21.

[0075] The second drive module 22 is connected to both the fan 5 and the controller 1. The controller 1 controls the change of the duty cycle of the first drive module 21, thereby changing the frequency of the power supply and causing the fan 5 to operate at a variable frequency. In other words, the controller 1 controls the second drive module 22 to control the fan 5 to change its operating frequency.

[0076] The first temperature detection unit 41 is connected to the first drive module 21 and electrically connected to the controller 1, and is used to detect the first operating temperature of the first drive module 21 and transmit it to the controller 1; the second temperature detection unit 4 is connected to the second drive module 22 and electrically connected to the controller 1, and is used to detect the second operating temperature of the second drive module 22 and transmit it to the controller 1.

[0077] Controller 1 has a first temperature threshold and a second temperature threshold preset, and is configured as follows: S10', cyclically obtain the first operating temperature and the second operating temperature; S20': Compare the first operating temperature with the first temperature threshold and the second operating temperature with the second temperature threshold; determine whether the first operating temperature reaches or exceeds the first temperature threshold and / or whether the second operating temperature exceeds the second temperature threshold; if so, execute S30'. S30', reduce the control frequency of compressor 3 and / or the control frequency of fan 5.

[0078] Similarly, the control frequency of compressor 3 and fan 5 is the frequency of switching of the switching components of the first drive module 21 and the second drive module 22; that is, one cycle of controlling the power supply includes the number of switching cycles of drive module 2; the duty cycle of the switch is used to control the voltage and current of the power supply; the number of switches or the frequency of the switch in one cycle is used to control the power supply quality.

[0079] The air conditioner of the present invention changes the switching frequency of the drive module 2 by controlling the control frequency of the compressor 3 and / or the fan 5 without changing the duty cycle, thereby reducing the heat generation power of the drive module 2 and thus reducing the operating temperature of the drive module 2. This not only reduces costs by reducing the number of heat dissipation components for the drive module 2, but also improves the temperature rise guarantee of the drive module 2, thereby improving the stability and reliability of the drive module 2 and extending its lifespan.

[0080] The specific structure, control process, and principle of the air conditioner of the present invention will be described in detail below through specific embodiments.

[0081] In some specific embodiments, refer to Figure 10 , Figure 11 , Figure 12 Controller 1 has a preset proportional threshold that is greater than 1, and is configured as follows: S10', cyclically obtain the first operating temperature and the second operating temperature; S20': Compare the first operating temperature with the first temperature threshold and the second operating temperature with the second temperature threshold; determine whether the first operating temperature reaches or exceeds the first temperature threshold and / or whether the second operating temperature reaches or exceeds the second temperature threshold; if so, execute S30'. S30': Obtain the operating frequency of compressor 3, denoted as the first operating frequency; compare the first control frequency of compressor 3 with the product of the proportional threshold and the first operating frequency; obtain the operating frequency of fan 5, denoted as the second operating frequency; compare the second control frequency of fan 5 with the product of the proportional threshold and the second operating frequency; determine whether the first control frequency of compressor 3 is not lower than the product of the proportional threshold and the first operating frequency and whether the second control frequency of fan 5 is not lower than the product of the proportional threshold and the second operating frequency; if yes, execute S40'; if no, execute S50'. S40', control to reduce the first control frequency of compressor 3 and / or the second control frequency of fan 5; S50' triggers a temperature rise control failure alarm.

[0082] That is, when the first operating temperature reaches or exceeds the first temperature threshold, the first control frequency and the product of the proportional threshold and the first operating frequency are compared; and if the first control frequency is not less than the product of the proportional threshold and the first operating frequency, the first control frequency is reduced. When the second operating temperature reaches or exceeds the second temperature threshold, the second control frequency and the product of the proportional threshold and the second operating frequency are compared; and if the second control frequency is not less than the product of the proportional threshold and the second operating frequency, the control frequency is reduced. When the first operating temperature reaches or exceeds the first temperature threshold and the second operating temperature reaches or exceeds the second temperature threshold, the first control frequency and the product of the proportional threshold and the first operating frequency, and the second control frequency and the product of the proportional threshold and the second operating frequency are compared. If both conditions are met, the first control frequency is not less than the product of the proportional threshold and the first operating frequency, and the second control frequency is not less than the product of the proportional threshold and the second operating frequency, the first control frequency and the second control frequency are reduced. Otherwise, if one or both conditions are not met, a temperature control failure alarm is triggered.

[0083] In this embodiment, the air conditioner sets a limiting relationship between a first control frequency and a first operating frequency, and a limiting relationship between a second control frequency and a second operating frequency to ensure the quality of the power supply.

[0084] In some specific embodiments, the ratio threshold is not less than 15. In some specific embodiments, refer to Figure 13 , Figure 14 , Figure 15 The outdoor unit also includes a current detection unit 6, which is connected to the second drive module 22 and the controller 1 respectively. It is used to detect the drive current of the second drive module 22 and transmit it to the controller 1. The controller 1 has a preset current threshold and is configured as follows: S100: Cyclicly acquire the first operating temperature, the second operating temperature, and the drive current; S200: Compare the first operating temperature with the first temperature threshold and the second operating temperature with the temperature threshold; determine whether the first operating temperature exceeds the first temperature threshold and / or whether the second operating temperature exceeds the second temperature threshold; if yes, then execute S300. S300: Compare the drive current with the current threshold; determine whether the drive current reaches or exceeds the current threshold; if yes, execute S400; if no, execute S500. S400, control to reduce the first control frequency of compressor 3 and / or the second control frequency of fan 5; S500, increase fan speed by 5. Improve airflow to cool the first drive module 21 and / or the second drive module 22.

[0085] In some specific embodiments, refer to Figure 13 , Figure 14 , Figure 15 Controller 1 also has a preset proportional threshold, which is greater than 1, and is configured as follows: S100: Cyclicly acquire the first operating temperature, the second operating temperature, and the drive current; S200: Compare the first operating temperature with the first temperature threshold and the second operating temperature with the temperature threshold; determine whether the first operating temperature exceeds the first temperature threshold and / or whether the second operating temperature exceeds the second temperature threshold; if yes, then execute S300. S300: Compare the drive current with the current threshold; determine whether the drive current reaches or exceeds the current threshold; if yes, execute S600; if no, execute S500. S600: Obtain the first operating frequency and the second operating frequency; compare the first control frequency and the product of the proportional threshold and the first operating frequency, and the second control frequency and the product of the proportional threshold and the second operating frequency; determine whether the control frequency of the compressor 3 is not lower than the product of the proportional threshold and the first operating frequency and / or whether the control frequency of the fan 5 is not lower than the product of the proportional threshold and the second operating frequency; if yes, execute S400; if no, execute S700. S500, increase fan speed by 5. Improve airflow for air cooling of the first drive module 21 and / or the second drive module 22; S400, control to reduce the first control frequency of compressor 3 and / or the second control frequency of fan 5; S700, Temperature rise control failure alarm.

[0086] In some specific embodiments, the ratio threshold is not less than 15.

[0087] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0088] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An air conditioner, comprising a compressor, which is an inverter type; characterized in that, Also includes: A drive module, which is connected to the compressor, is used to drive the compressor to operate; A temperature detection unit, which is connected to the drive module, is used to detect the temperature of the drive module, and is recorded as the operating temperature; The controller, which is connected to the drive module and the temperature detection unit respectively, is configured with a temperature threshold and is configured as follows: The operating temperature is obtained cyclically; Compare the operating temperature with the temperature threshold; determine whether the operating temperature exceeds the temperature threshold; if so, reduce the control frequency of the compressor.

2. The air conditioner according to claim 1, characterized in that, The controller is also configured to control the operating frequency of the compressor; The controller has a preset proportional threshold, which is greater than 1, and is configured such that the control frequency is not lower than the product of the proportional threshold and the operating frequency.

3. The air conditioner according to claim 2, characterized in that, The value of the ratio threshold is not less than 15.

4. An air conditioner, comprising an outdoor unit, which includes a fan; said fan is a variable frequency type; characterized in that, Also includes: A drive module, which is connected to the fan, is used to drive the fan to operate; A temperature detection unit, which is connected to the drive module, is used to detect the temperature of the drive module, and is recorded as the operating temperature; The controller, which is connected to the drive module and the temperature detection unit respectively, is configured with a temperature threshold and is configured as follows: The operating temperature is obtained cyclically; Compare the operating temperature with the temperature threshold; determine whether the operating temperature exceeds the temperature threshold; if so, reduce the control frequency of the fan.

5. The air conditioner according to claim 4, characterized in that, It also includes a current detection unit, which is connected to the drive module and is used to detect the drive current; The controller is connected to the current detection unit and is also configured with a current threshold, which is configured as follows: The operating temperature and the drive current are obtained cyclically. Determine whether the operating temperature exceeds the temperature threshold; if so, compare the drive current with the current threshold. Determine whether the drive current exceeds the current threshold. If yes, then reduce the control frequency of the fan; if no, then increase the speed of the fan.

6. The air conditioner according to claim 5, characterized in that, The controller is also configured to control the operating frequency of the fan; The controller has a preset proportional threshold, which is greater than 1, and is configured such that the control frequency is not lower than the product of the proportional threshold and the operating frequency.

7. The air conditioner according to claim 6, characterized in that, The value of the ratio threshold is not less than 15.

8. An air conditioner, characterized in that, This includes the outdoor unit, which comprises a compressor and a fan; The compressor and the fan are variable frequency type; characterized in that they also include: A first drive module, which is connected to the compressor, is used to drive the compressor to operate; The second drive module is connected to the fan and is used to drive the fan to operate; A first temperature detection unit is connected to the first drive module and is used to detect the temperature of the first drive module, which is denoted as the first operating temperature. The second temperature detection unit is connected to the second drive module and is used to detect the temperature of the second drive module, which is recorded as the second operating temperature. A current detection unit, which is connected to the second drive module, is used to detect the drive current; The controller, which is connected to the first drive module, the second drive module, the first temperature detection unit, the second temperature detection unit, and the current detection unit respectively, is configured with a current threshold and a temperature threshold, and is configured as follows: The first operating temperature, the second operating temperature, and the driving current are obtained cyclically. Determine whether the first operating temperature and / or the second operating temperature exceed the temperature threshold; if so, compare the drive current with the current threshold. Determine whether the drive current exceeds the current threshold; if yes, reduce the first control frequency of the first drive module and / or the second control frequency of the second drive module; if no, control to increase the fan speed.

9. The air conditioner according to claim 8, characterized in that, The controller is also configured to control a first operating frequency of the compressor and a second operating frequency of the fan. The controller has a preset proportional threshold, which is greater than 1, and is configured such that the first control frequency is not lower than the product of the proportional threshold and the first operating frequency; and the second control frequency is not lower than the product of the proportional threshold and the second operating frequency.

10. The air conditioner according to claim 9, characterized in that, The value of the ratio threshold is not less than 15.

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