An air conditioning apparatus

Abstract

This invention discloses an air conditioning device, including an outdoor unit. The outdoor unit includes a housing and a partition located within the housing. The partition divides the space within the housing into a first chamber and a second chamber. The first chamber houses a compressor, and the second chamber houses an outdoor heat exchanger and an outdoor fan. The housing has an outdoor power module inlet communicating with the first chamber. The partition has a through hole connecting the first and second chambers. The outdoor power module of the air conditioning device is located within the first chamber. The outdoor fan generates airflow that sequentially passes through the outdoor power module inlet, the outdoor power module, and the through hole, dissipating heat from the outdoor power module. In this invention, the airflow generated by the outdoor fan passing through the outdoor power module does not pass through the outdoor heat exchanger. Therefore, the air conditioning device can ensure that the heat dissipation of the outdoor power module is not affected by the temperature of the outdoor heat exchanger in all modes.

Description

Technical Field

[0001] This invention relates to the field of air conditioning control technology, and in particular to an air conditioning device capable of dissipating heat from the outdoor unit's power module. Background Technology

[0002] The outdoor unit of an air conditioning system has an outdoor power module. When the air conditioning system is running, the outdoor power module generates a lot of heat, exceeding the upper temperature limit. Therefore, it is necessary to dissipate heat from the outdoor power module.

[0003] There are two main methods for heat dissipation of outdoor power modules in the existing technology:

[0004] Method 1: For example Figure 1 As shown, the outdoor power module includes a circuit board 1 and a heat sink 2 in close contact with the circuit board 1. The heat sink 1 is close to the outdoor fan 3. Forced airflow from the outdoor fan 3 creates negative pressure, drawing ambient air through the outdoor heat exchanger 4 into the outdoor fan 3 and across the heat sink 2 of the outdoor power module. When the circuit board 1 is powered on, its temperature is relatively high, and the heat sink 2, upon contact with it, also reaches a relatively high temperature. Under these conditions, the heat sink 2 cools down after exchanging heat with the air, and the temperature of the circuit board 1 also decreases accordingly, completing the cooling process for the circuit board 1. The drawback of this cooling method occurs in the air conditioning cooling mode. The outdoor heat exchanger 4 condenses and releases heat. The air first absorbs heat and its temperature rises after passing through the outdoor heat exchanger 4, and then dissipates heat to the outdoor power module. This leads to a decrease in the effectiveness of the outdoor power module, especially in high outdoor temperatures where the air temperature after passing through the outdoor heat exchanger 4 can reach over 50°C. Consequently, the cooling effect of the outdoor power module drops sharply.

[0005] Method 2, such as Figure 2 As shown, the outdoor power module 12 and the refrigerant pipe 5 are in close contact. The refrigerant pipe 5 is located between the outdoor heat exchanger 4 and the indoor heat exchanger. The temperature of the refrigerant pipe 5 is relatively low, and it cools the outdoor power module 12 through heat conduction in contact with it. This method has two drawbacks. First, in the air conditioning heating mode, the refrigerant flows from the outdoor heat exchanger 4 into the refrigerant pipe 5. The refrigerant temperature is very low, and water vapor in the air is easily condensed into water after contacting the refrigerant pipe 5, increasing the risk of water damage to the controller components of the outdoor power module 12. The second drawback is that the refrigerant in the air conditioning system participates in the cooling of the outdoor power module 12, reducing the refrigerant heat exchange efficiency and decreasing the air conditioning energy efficiency.

[0006] 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

[0007] This invention proposes an air conditioning device that solves the technical problems of poor heat dissipation due to the influence of the outdoor heat exchanger on the air-cooled heat dissipation of the existing outdoor power module, as well as the condensation and reduced heat exchange efficiency of the refrigerant.

[0008] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0009] In some embodiments of this application, an air conditioning device is provided:

[0010] An air conditioning unit includes an outdoor unit, the outdoor unit comprising:

[0011] case;

[0012] A partition, located inside the housing, is used to divide the space inside the housing into a first chamber and a second chamber. The first chamber is used to house the compressor, and the second chamber is used to house the outdoor heat exchanger and the outdoor fan.

[0013] An outdoor power module air inlet is located on the housing and communicates with the first chamber;

[0014] A through-hole is located on the partition, and the through-hole is used to connect the first chamber and the second chamber;

[0015] The outdoor power module is located inside the first cavity;

[0016] The outdoor fan is used to generate airflow that passes sequentially through the air inlet of the outdoor power module, the outdoor power module, and the through hole, and the airflow dissipates heat from the outdoor power module.

[0017] In the air conditioning device described above, the outdoor power module is located in the first cavity near the through hole, and the outdoor power module includes a heat dissipation module, which is opposite to the through hole.

[0018] As described above, the outdoor fan of the air conditioning unit includes a first outdoor fan and a second outdoor fan. When the air conditioning unit is in heating operation, the first outdoor fan and the second outdoor fan are sequentially positioned in the refrigerant flow direction of the outdoor heat exchanger. The air conditioning unit includes:

[0019] The storage module is used to store the conditions for entering the high-temperature heating mode;

[0020] The parameter detection module is used to detect the parameters required to enter the high-temperature heating mode.

[0021] The control module is used to control the first outdoor fan to stop running and control the second outdoor fan to run within a preset speed range when the parameters detected by the parameter detection module meet the conditions of the high-temperature heating mode and the air conditioning device is in the heating mode.

[0022] The air conditioning device described above, wherein the parameter detection module includes:

[0023] Indoor ambient temperature detection module, used to detect indoor ambient temperature Tin;

[0024] And / or, an outdoor ambient temperature detection module, used to detect the outdoor ambient temperature Tout;

[0025] The conditions for entering the high-temperature heating mode include: the indoor ambient temperature Tin is higher than the preset indoor ambient temperature, and / or the outdoor ambient temperature Tout is higher than the preset outdoor ambient temperature.

[0026] The air conditioning device described above, wherein the parameter detection module includes:

[0027] Indoor heat exchanger temperature / pressure detection module, used to detect the temperature / pressure of the indoor heat exchanger;

[0028] The conditions for entering the high-temperature heating mode include that the indoor heat exchanger temperature / pressure is higher than the set indoor heat exchanger temperature / pressure.

[0029] In the air conditioning unit described above, the air volume generated by the preset speed range of the second outdoor fan is less than the standard air volume; furthermore, the air volume generated by the preset speed range of the second outdoor fan is 25%-35% of the standard air volume.

[0030] The air conditioning unit as described above, the air conditioning unit includes:

[0031] An outdoor power module temperature detection module is used to detect the temperature of the outdoor power module;

[0032] The control module is used to control the speed of the second outdoor fan to increase and / or control the frequency of the compressor to decrease when the temperature of the outdoor power module exceeds a preset temperature during the high-temperature heating mode.

[0033] The air conditioning device described above includes: an indoor heat exchanger temperature / pressure detection module for detecting the temperature / pressure of the indoor heat exchanger;

[0034] The control module is used to control the speed of the second outdoor fan to increase when the temperature / pressure of the indoor heat exchanger is within the preset temperature / pressure range and the temperature of the outdoor power module exceeds the preset temperature.

[0035] The control module is used to control the compressor to reduce its frequency or stop when the indoor heat exchanger's heating temperature / pressure exceeds the preset temperature / pressure range and the outdoor power module's temperature exceeds the preset temperature.

[0036] The control module is used to control the speed of the second outdoor fan to decrease when the temperature / pressure of the indoor heat exchanger exceeds the preset temperature / pressure range and the temperature of the outdoor power module does not exceed the preset temperature.

[0037] In the air conditioning device described above, the control module is used to control the compressor to reduce its frequency or stop when the speed of the second outdoor fan is at the upper limit of the preset speed range and the temperature of the outdoor power module still exceeds the preset temperature.

[0038] The control module is used to control the compressor to reduce its frequency or stop when the speed of the second outdoor fan is at the lower limit of the preset speed range and the temperature / pressure of the indoor heat exchanger exceeds the preset temperature / pressure range.

[0039] In the air conditioning device described above, the control module is used to first increase the indoor fan speed when the second outdoor fan speed is at the lower limit of the preset speed range, and then control the compressor frequency to decrease or stop when the indoor fan speed is increased to the maximum speed and the temperature / pressure of the indoor heat exchanger still exceeds the preset temperature / pressure range.

[0040] Compared with the prior art, the advantages and positive effects of the present invention are as follows: The air conditioning device of the present invention includes an outdoor unit, which includes a housing and a partition located within the housing. The partition divides the space within the housing into a first chamber and a second chamber. The first chamber houses the compressor, and the second chamber houses the outdoor heat exchanger and the outdoor fan. The housing has an outdoor power module air inlet communicating with the first chamber, and the partition has a through hole communicating with the first and second chambers. The outdoor power module of the air conditioning device is located in the first chamber. The outdoor fan generates airflow that passes sequentially through the outdoor power module air inlet, the outdoor power module, and the through hole, dissipating heat from the outdoor power module. In the present invention, the airflow generated by the outdoor fan passing through the outdoor power module does not pass through the outdoor heat exchanger, and the airflow temperature is the outdoor ambient temperature. Therefore, the present invention can guarantee the heat dissipation effect of the outdoor power module in all modes of the air conditioning device, unaffected by the temperature of the outdoor heat exchanger. The present invention does not involve refrigerant cooling, and there are no issues of condensation or reduced air conditioning energy efficiency.

[0041] 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

[0042] 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.

[0043] Figure 1 This is a schematic diagram of the structure of the existing technology method one;

[0044] Figure 2 This is a schematic diagram of the structure of the existing technology method two;

[0045] Figure 3 This is a schematic diagram of an outdoor unit of an air conditioner according to a specific embodiment of the present invention;

[0046] Figure 4 This is a schematic diagram of the structure of an air conditioner outdoor unit according to a specific embodiment of the present invention;

[0047] Figure 5 This is a schematic diagram of a refrigerant system according to a specific embodiment of the present invention;

[0048] Figure 6 This is a principle block diagram of a specific embodiment of the present invention;

[0049] Figure 7 This is a flowchart of a specific embodiment of the present invention;

[0050] Figure 8 This is a principle block diagram of a specific embodiment two of the present invention;

[0051] Figure 9 This is a flowchart of a specific embodiment two of the present invention;

[0052] Figure 10 This is a principle block diagram of a specific embodiment two of the present invention;

[0053] Figure 11 This is a flowchart of a specific embodiment two of the present invention;

[0054] Figure label:

[0055] 1. Circuit board;

[0056] 2. Heat sink;

[0057] 12. Outdoor power module;

[0058] 3. Outdoor fan;

[0059] 31. First outdoor fan;

[0060] 32. Second outdoor fan;

[0061] 4. Outdoor heat exchanger;

[0062] 5. Refrigerant pipe;

[0063] 6. Shell;

[0064] 7. Dividers;

[0065] 8. First chamber;

[0066] 9. Second chamber;

[0067] 10. Outdoor power module air inlet;

[0068] 11. Through hole;

[0069] 12. Air vent. Implementation

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] In this application, the air conditioning unit performs a refrigeration cycle by using a compressor, condenser, expansion valve, and evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat an indoor space.

[0077] 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.

[0078] 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 conditioning unit regulates the temperature of the indoor space.

[0079] The outdoor unit of an air conditioning unit refers to the part of the refrigeration cycle that includes the compressor and the outdoor heat exchanger. The indoor unit of an air conditioning unit includes the indoor heat exchanger, and the expansion valve can be provided in either the indoor or outdoor unit.

[0080] The indoor and outdoor heat exchangers function as either condensers or evaporators. When the indoor heat exchanger is used as a condenser, the air conditioning unit functions as a heater in heating mode; when the indoor heat exchanger is used as an evaporator, the air conditioning unit functions as a cooler in cooling mode.

[0081] This embodiment proposes an air conditioning device, including an outdoor power module. Through the structural design of the outdoor unit and the positional design of the outdoor power module, an air-cooled heat dissipation method for the outdoor power module is achieved. Therefore, this embodiment does not have the disadvantages of refrigerant-based heat dissipation. Furthermore, in this embodiment, the air passing through the outdoor power module does not pass through an outdoor heat exchanger, avoiding the problem of poor heat dissipation caused by the temperature of the outdoor heat exchanger in air-cooled heat dissipation methods.

[0082] The air conditioning unit in this embodiment includes an outdoor unit and an indoor unit. This embodiment first improves the structure of the outdoor unit to provide a new heat dissipation method for the outdoor power module and improve the heat dissipation effect of the outdoor power module.

[0083] like Figure 3-4 As shown, the outdoor unit of this embodiment includes a housing 6 and a partition 7 located inside the housing 6. The partition 7 is used to divide the space inside the housing 6 into a first chamber 8 and a second chamber 9.

[0084] The shell 6 includes a top plate and a bottom plate arranged opposite each other, a front panel and a rear panel arranged opposite each other, and a left side panel and a right side panel arranged opposite each other. The top plate, bottom plate, front panel, rear panel, left side panel and right side panel enclose a rectangular shell 6.

[0085] The separator 7 is generally a separator plate.

[0086] In some embodiments, the partition plate can be a flat plate, which is connected to the front panel, rear panel, top plate and bottom plate to divide the interior of the housing 6 into two spaces, namely the first chamber 8 and the second chamber 9.

[0087] In some embodiments, the partition plate may be an L-shaped plate, which is connected to the front panel, rear panel, top panel and left / right side panel to divide the interior of the housing 6 into two spaces, namely the first chamber 8 and the second chamber 9.

[0088] In some embodiments, the partition plate may be an L-shaped plate, which is connected to the front panel, rear panel, bottom plate and left / right side plate to divide the interior of the housing 6 into two spaces, namely the first chamber 8 and the second chamber 9.

[0089] The first chamber 8 is used to house the compressor, and the second chamber 9 is used to house the outdoor heat exchanger 4 and the outdoor fan 3.

[0090] An outdoor heat exchanger air inlet (not shown in the figure) and an air outlet 12 are provided on the shell 6 corresponding to the second chamber 9. Generally, the outdoor heat exchanger air inlet is located on the rear panel, and the air outlet 12 is located on the front panel.

[0091] When the outdoor fan 3 is running, the air outside the casing 6 enters the second chamber 9 inside the casing through the air inlet of the outdoor heat exchanger, passes through the outdoor heat exchanger 4 in the second chamber 9, exchanges heat with the outdoor heat exchanger 4, and is then discharged from the air outlet 12 through the outdoor fan 3.

[0092] The key feature of this embodiment is that an outdoor power module air inlet 10 communicating with the first chamber 8 is provided on the housing 6, so that air outside the housing 6 can enter the first chamber 8 through the outdoor power module air inlet 10.

[0093] The outdoor power module air inlet 10 can be located on the housing 6 that forms the first chamber 8, for example: the front panel, side panel and rear panel.

[0094] In some embodiments, an air intake grille and / or a waterproof structure are provided on the outdoor power module air intake 10.

[0095] A through hole 11 is provided on the separator 7 to connect the first chamber 8 and the second chamber 9, so that the first chamber 8 and the second chamber 9 are connected, so that the outdoor fan 3 can generate negative pressure in the first chamber 8 when it is working.

[0096] The outdoor power module 12 of the air conditioning unit is located in the first chamber 8. The outdoor fan 3 is used to generate airflow that passes through the outdoor power module air inlet 10, the outdoor power module 12 and the through hole 11 in sequence. The airflow dissipates heat from the outdoor power module 12.

[0097] When the outdoor fan 3 is running, on the one hand, air outside the casing 6 enters the second chamber 9 inside the casing through the outdoor heat exchanger inlet, passes through the outdoor heat exchanger 4 in the second chamber 9, exchanges heat with the outdoor heat exchanger 4, and then passes through the outdoor fan 3 and is discharged from the outlet 12, thus achieving heat dissipation of the outdoor heat exchanger 4; on the other hand, such as Figure 4 The arrows indicate the airflow path of the outdoor power module 12. The outdoor fan 3 generates negative pressure in the first chamber 8. Air outside the housing 6 enters the first chamber 8 through the outdoor power module inlet 10. The outdoor power module 12 is located on the airflow path. Therefore, when the airflow passes through the outdoor power module 12, it dissipates heat from the outdoor power module 12 and then enters the second chamber 9 through the through hole 11. After passing through the outdoor fan 3, it is discharged from the outlet 12, thus achieving heat dissipation of the outdoor power module 12.

[0098] In this embodiment, the airflow generated by the outdoor fan 3 passing through the outdoor power module 12 does not pass through the outdoor heat exchanger 4. The air temperature in contact with the outdoor power module 12 is the outdoor ambient temperature. Therefore, this embodiment can ensure the heat dissipation effect of the outdoor power module 12 in all modes of the air conditioning unit, unaffected by the temperature of the outdoor heat exchanger 4. In addition, this embodiment places the outdoor power module 12 in the first chamber 8, without changing the position of the outdoor heat exchanger 4. The modifications made to the existing outdoor unit are minor, which can save costs.

[0099] To improve the heat dissipation of the outdoor power module 12, the outdoor power module 12 is located in the first chamber 8 near the through hole 11.

[0100] The outdoor power module 12 includes a circuit board 1 and a heat dissipation module (heat sink 2). At least the heat sink 2 is opposite to the through hole 11. Therefore, the airflow flowing through the through hole 11 must flow through the heat sink 2, and the airflow here is more concentrated, so the heat dissipation effect of the heat sink 2 is better.

[0101] In this embodiment, the circuit board 1 and heat sink 2 of the outdoor power module 12 are in close contact, and the heat generated by the circuit board 1 is directly transferred to the heat sink 2. The heat sink 2 is located in the first chamber 8. Through the forced airflow of the outdoor fan 3, the first chamber 8 forms a negative pressure. Air from the external environment of the housing 6 enters the first chamber 8 through the air inlet 10 of the outdoor power module and then flows through the heat sink 2. After the circuit board 1 is powered on, its temperature is relatively high, and the heat sink 2 also becomes relatively hot after contacting it. Under these circumstances, the heat sink 2 cools down after exchanging heat with the air in the first chamber 8, and the temperature of the circuit board 1 also decreases accordingly, completing the cooling process of the circuit board 1. The heat dissipation method of this embodiment is to introduce air from the environment outside the housing 6 to directly cool the outdoor power module 12. Therefore, this embodiment does not have the problem of poor heat exchange effect in high-temperature environments mentioned in the first method of the background technology; at the same time, this embodiment also does not have the problems of controller components failing when exposed to water and air conditioning energy efficiency decreasing as mentioned in the second method.

[0102] However, under high-temperature heating conditions, the outdoor ambient temperature is high, requiring a reduction in the speed of the outdoor fan 3 to unload and depressurize the air conditioning system. If the outdoor fan 3 speed is too low, the negative pressure in the first chamber 8 is low, resulting in less air being introduced into the first chamber 8. However, under this condition, the outdoor power module 12 generates a large amount of heat, leading to a high temperature and potentially causing the air conditioner to shut down due to overheating of the outdoor power module 12. This technical problem does not exist in the first solution of the background technology because the air dissipating heat from the outdoor power module 12 first passes through the outdoor heat exchanger 4. In the air conditioning heating mode, the outdoor heat exchanger 4 has a low temperature, resulting in a significant air cooling effect. The second solution of the background technology also does not have this technical problem because the refrigerant pipe 5 dissipating heat from the outdoor power module 12 flows out from the outdoor heat exchanger 4, resulting in a low refrigerant pipe 5 and a significant cooling effect. Therefore, the background technology cannot explain the problem of the air conditioner shutting down due to overheating of the outdoor power module 12 during high-temperature heating in this embodiment.

[0103] like Figure 5 As shown, the air conditioning unit in this embodiment includes an indoor unit and an outdoor unit, which are connected and operate via connecting pipes, power cords, and communication lines. The indoor unit includes an indoor heat exchanger and an indoor fan, etc.; the outdoor unit includes an outdoor heat exchanger, a four-way valve, a compressor, a throttling component, etc.

[0104] The air conditioning unit in this embodiment has at least two functional modes: cooling and heating.

[0105] The cooling mode workflow is as follows: The compressor draws low-temperature, low-pressure refrigerant vapor returned from the indoor heat exchanger. After being compressed by the compressor, the refrigerant becomes high-temperature, high-pressure vapor and enters the outdoor heat exchanger. At this time, the outdoor heat exchanger acts as a condenser, cooling the high-temperature vapor and reducing the refrigerant temperature to a medium-temperature liquid. The refrigerant then enters the throttling device, where it is cooled and depressurized, becoming a low-temperature, low-pressure liquid before entering the indoor heat exchanger. Here, the indoor heat exchanger acts as an evaporator, allowing the refrigerant to absorb heat, thereby cooling the indoor environment. The refrigerant flowing out of the evaporator becomes low-temperature, low-pressure vapor and re-enters the compressor, completing one refrigeration cycle.

[0106] In the refrigeration cycle, the outdoor heat exchanger, acting as the condenser, is located on the high-pressure side. Heat is released and pressure is reduced through forced airflow from the fan. The condenser pressure varies with the outdoor ambient temperature; the higher the outdoor temperature, the higher the condenser pressure. Under high-temperature conditions, the outdoor fan operates at high speed, resulting in a large negative pressure in the first chamber and a large ventilation volume. This leads to high heat exchange efficiency of the outdoor power module's heat sink, eliminating the problem of excessively high outdoor power module temperature. Under low-temperature conditions, the outdoor fan operates at low speed, resulting in a small negative pressure and low ventilation volume in the first chamber. However, due to the small temperature difference between the indoor and outdoor environments, the condenser pressure remains at a low level. The outdoor fan does not operate at extremely low speeds, and there is no problem of excessively high condenser pressure. For the outdoor power module, since the fan speed is not very low and the heat exchange efficiency is not very poor, there is no problem of excessively high outdoor power module temperature.

[0107] The heating mode workflow is as follows: The compressor draws low-temperature, low-pressure refrigerant vapor returned from the outdoor heat exchanger. After being compressed by the compressor, the refrigerant becomes high-temperature, high-pressure vapor and enters the indoor heat exchanger. At this time, the indoor heat exchanger acts as a condenser, which dissipates heat and cools the high-temperature vapor, thereby raising the indoor temperature. Subsequently, the refrigerant cools down to a medium-temperature liquid and enters the throttling device. After being cooled and depressurized by the throttling device, it becomes a low-temperature, low-pressure liquid and enters the outdoor heat exchanger. At this time, the outdoor heat exchanger acts as an evaporator, which allows the refrigerant to absorb heat and evaporate into gas. Afterward, the refrigerant flows out of the evaporator and re-enters the compressor, completing one heating cycle.

[0108] In the heating cycle, the outdoor heat exchanger, acting as the evaporator, is located on the low-pressure side. Forced airflow from the fan draws heat and increases pressure. The evaporator pressure varies with the outdoor ambient temperature; the higher the outdoor temperature, the higher the evaporator pressure. Under low-temperature conditions, the outdoor fan operates at high speed, resulting in a high negative pressure and large ventilation volume in the first chamber. This leads to high heat exchange efficiency of the outdoor power module's heat sink, preventing overheating of the outdoor power module. Under high-temperature conditions, the outdoor fan operates at low speed, resulting in a low negative pressure and small ventilation volume in the first chamber. In this case, the evaporator pressure is high, and the outdoor fan speed cannot be too high, otherwise it may cause the indoor condenser to overheat and shut down. However, if the outdoor fan speed is too low, the ventilation volume in the first chamber decreases, reducing the heat exchange efficiency of the outdoor power module's heat sink and potentially causing overheating.

[0109] Therefore, this embodiment further addresses the problem of high pressure or high temperature of outdoor power module under high temperature conditions by optimizing the control of the air conditioner operation mode and outdoor fan speed, starting from the outdoor fan control logic.

[0110] In this embodiment, the outdoor fan 3 includes a first outdoor fan 31 and a second outdoor fan 32. When the air conditioning unit is in heating operation, the first outdoor fan 31 and the second outdoor fan 32 are sequentially positioned in the refrigerant flow direction of the outdoor heat exchanger. That is, when the air conditioning unit is in heating operation, the outdoor heat exchanger 4 includes a refrigerant inlet and a refrigerant outlet. The first outdoor fan 31 is located near the refrigerant inlet of the outdoor heat exchanger 4, and the second outdoor fan 32 is located near the refrigerant outlet of the outdoor heat exchanger 4. Generally, when the air conditioning unit is in heating operation, the refrigerant flow direction of the outdoor heat exchanger is from bottom to top, that is, the refrigerant outlet is located below the refrigerant inlet. Therefore, the first outdoor fan 31 and the second outdoor fan 32 are arranged vertically, with the first outdoor fan 31 being the lower fan and the second outdoor fan 32 being the upper fan.

[0111] This embodiment sets the conditions for a high-temperature heating mode. When entering the high-temperature heating mode, the rotation speeds of the first outdoor fan 31 and the second outdoor fan 32 are set to ensure the temperature of the outdoor power module and the pressure of the indoor heat exchanger, thus ensuring the normal operation of the air conditioning unit.

[0112] like Figure 6 As shown, the air conditioning unit includes a storage module, a parameter detection module, and a control module. The control module receives the parameters detected by the parameter detection module and compares them with the conditions stored in the storage module. Based on the comparison result, it controls the operating status of the first outdoor fan 31 and the second outdoor fan 32.

[0113] The storage module is used to store the conditions for entering the high-temperature heating mode.

[0114] The parameter detection module is used to detect the parameters for entering the high-temperature heating mode.

[0115] In some embodiments, the parameter detection module includes:

[0116] The indoor ambient temperature detection module is used to detect the indoor ambient temperature Tin.

[0117] And / or, the outdoor ambient temperature detection module is used to detect the outdoor ambient temperature Tout.

[0118] Correspondingly, the conditions for entering the high-temperature heating mode stored in the storage module include: the indoor ambient temperature Tin is higher than the preset indoor ambient temperature, and / or the outdoor ambient temperature Tout is higher than the preset outdoor ambient temperature.

[0119] The preset indoor ambient temperature is a predetermined temperature. For example, if the preset indoor ambient temperature is 20 degrees, the conditions for entering the high-temperature heating mode include: indoor ambient temperature Tin ≥ 20 degrees.

[0120] The preset outdoor ambient temperature is a predetermined temperature. For example, if the preset outdoor ambient temperature is 20 degrees, then the conditions for entering the high-temperature heating mode include: outdoor ambient temperature Tout ≥ 20 degrees.

[0121] The control module is used to control the first outdoor fan 31 to stop running and the second outdoor fan 32 to run within a preset speed range when the parameters detected by the parameter detection module meet the conditions for the high-temperature heating mode and the air conditioning unit is in the heating mode; the control module is used to control the air conditioning unit normally according to the preset heating or cooling mode when the parameters detected by the parameter detection module do not meet the conditions for the high-temperature heating mode.

[0122] The air volume generated by the preset speed range of the second outdoor fan 32 is less than the standard air volume. The standard air volume refers to the air volume required under rated cooling conditions, i.e., the default air volume at the factory.

[0123] In some embodiments, the air volume generated by the preset speed range of the second outdoor fan 32 is 25%-35% of the standard air volume.

[0124] In this embodiment, the second outdoor fan 32 corresponds to the through hole 11 and is used to generate negative pressure in the first chamber 8.

[0125] Under high-temperature conditions, the outdoor unit requires less airflow, and a single fan is sufficient to meet the evaporator's heat exchange airflow requirements; therefore, single fan operation is selected. The first outdoor fan 31 is located at the lower part of the evaporator. In heating mode, the refrigerant enters from the lower part of the evaporator, where the refrigerant is in a liquid saturated state, with a small volume, low flow rate, and low heat exchange. In the upper part of the outdoor heat exchanger, the refrigerant evaporates to a higher dryness, resulting in a larger volume, higher flow rate, and higher heat exchange. Based on the heat exchange distribution characteristics of the evaporator, the lower first outdoor fan 31 is turned off, and the upper second outdoor fan 32 is turned on.

[0126] In some embodiments, the parameter detection module may further include:

[0127] Indoor heat exchanger temperature / pressure detection module, used to detect the temperature / pressure of the indoor heat exchanger.

[0128] Correspondingly, the conditions for entering the high-temperature heating mode include that the indoor heat exchanger temperature / pressure is higher than the set indoor heat exchanger temperature / pressure.

[0129] like Figure 7 As shown, the control flow of the air conditioning unit in this embodiment is as follows:

[0130] S1, Begin.

[0131] S2. Determine whether the air conditioning unit is in heating mode. If yes, proceed to step S3; otherwise, proceed to step S7.

[0132] S3, the parameter detection module detects the parameters for entering the high-temperature heating mode.

[0133] S4. Determine whether the detected parameters meet the conditions for entering the high-temperature heating mode. If they do, proceed to step S5; otherwise, proceed to step S6.

[0134] S5. Control the first outdoor fan to stop running, and control the second outdoor fan to run within the preset speed range. Proceed to step S3.

[0135] S6. Operate normally in the heating mode of the air conditioning unit. Proceed to step S3.

[0136] S7. Operate normally according to the set operating mode of the air conditioning unit.

[0137] To more precisely control the temperature of the outdoor power module and prevent it from overheating and triggering shutdown protection, such as... Figure 8 As shown, the air conditioning device in this embodiment also includes an outdoor power module temperature detection module. The control module is used to control the operating status of the first outdoor fan and the second outdoor fan according to the temperature detected by the outdoor power module temperature detection module, and can further control the operating status of the compressor.

[0138] The outdoor power module temperature detection module is used to detect the temperature of the outdoor power module.

[0139] The control module is used to control the speed of the second outdoor fan to increase and / or control the frequency of the compressor to decrease when the temperature of the outdoor power module exceeds the preset temperature during the high-temperature heating mode, so as to reduce the temperature of the outdoor power module.

[0140] To ensure adequate indoor pressure and prevent overpressure shutdown, such as... Figure 8 As shown, the air conditioning unit also includes an indoor heat exchanger temperature / pressure detection module, which is used to detect the temperature / pressure of the indoor heat exchanger.

[0141] The control module is used to increase the speed of the second outdoor fan when the temperature / pressure of the indoor heat exchanger is within the preset temperature / pressure range and the temperature of the outdoor power module exceeds the preset temperature. This increases the airflow through the outdoor power module, enhances its heat dissipation effect, and lowers its temperature.

[0142] When the second outdoor fan speed is at the upper limit of the preset speed range and the temperature of the outdoor power module still exceeds the preset temperature, the compressor frequency is reduced to decrease the power of the outdoor power module and lower its temperature. If the outdoor power module temperature still exceeds the preset temperature when the compressor frequency is reduced to the minimum value, the compressor is shut down for protection.

[0143] The control module is used to control the compressor frequency to decrease when the indoor heat exchanger heating temperature / pressure exceeds the preset temperature / pressure range and the outdoor power module temperature exceeds the preset temperature. When the compressor frequency decreases to the minimum value, and the indoor heat exchanger heating temperature / pressure exceeds the preset temperature / pressure range and the outdoor power module temperature exceeds the preset temperature, the control module controls the compressor to shut down for protection.

[0144] The control module is used to reduce the speed of the second outdoor fan when the temperature / pressure of the indoor heat exchanger exceeds the preset temperature / pressure range and the temperature of the outdoor power module does not exceed the preset temperature. When the speed of the second outdoor fan is at the lower limit of the preset speed range and the temperature / pressure of the indoor heat exchanger exceeds the preset temperature / pressure range, the module controls the frequency of the compressor to decrease, thereby reducing the temperature / pressure of the indoor heat exchanger. When the temperature / pressure of the indoor heat exchanger exceeds the preset temperature / pressure range when the compressor frequency decreases to the minimum value, the module controls the compressor to shut down for protection.

[0145] like Figure 9 As shown, the control flow of the air conditioning unit in this embodiment is as follows:

[0146] S1, Begin.

[0147] S2. Determine whether the air conditioning unit is in heating mode. If yes, proceed to step S3; otherwise, proceed to step S21.

[0148] S3, the parameter detection module detects the parameters for entering the high-temperature heating mode.

[0149] S4. Determine whether the detected parameters meet the conditions for entering the high-temperature heating mode. If they do, proceed to step S5; otherwise, proceed to step S20.

[0150] S5. Control the first outdoor fan to stop running, and control the second outdoor fan to run within the preset speed range.

[0151] S6. Detect the temperature of the outdoor power module and the temperature / pressure of the indoor heat exchanger.

[0152] When the indoor heat exchanger temperature / pressure is within the preset temperature / pressure range and the outdoor power module temperature does not exceed the preset temperature, proceed to step S6.

[0153] When the indoor heat exchanger temperature / pressure is within the preset temperature / pressure range and the outdoor power module temperature exceeds the preset temperature, proceed to step S7.

[0154] When the indoor heat exchanger's heating temperature / pressure exceeds the preset temperature / pressure range and the outdoor power module's temperature exceeds the preset temperature, proceed to step S12.

[0155] If the temperature / pressure of the indoor heat exchanger exceeds the preset temperature / pressure range and the temperature of the outdoor power module does not exceed the preset temperature, proceed to step S15.

[0156] S7. Determine if the speed of the second outdoor fan is at the upper limit. If yes, proceed to step S8. If no, proceed to step S11.

[0157] S8. Determine if the compressor operating frequency is at its lowest value. If yes, proceed to step S10; otherwise, proceed to step S9.

[0158] S9. Control the compressor to reduce its frequency. Proceed to step S3.

[0159] S10, Control the compressor to stop.

[0160] S11. Control the speed of the second outdoor fan to increase. Proceed to step S3.

[0161] S12. Determine if the compressor operating frequency is at its lowest value. If yes, proceed to step S14; otherwise, proceed to step S13.

[0162] S13. Control the compressor to reduce frequency. Proceed to step S3.

[0163] S14. Control the compressor to stop.

[0164] S15. Determine if the speed of the second outdoor fan is at the lower limit. If yes, proceed to step S16. If no, proceed to step S19.

[0165] S16. Determine if the compressor operating frequency is at its lowest value. If yes, proceed to step S18; otherwise, proceed to step S17.

[0166] S17. Control the compressor to reduce frequency. Proceed to step S3.

[0167] S18, Control the compressor to stop.

[0168] S19. Control the speed of the second outdoor fan to decrease. Proceed to step S3.

[0169] S20. The air conditioning unit operates normally in heating mode. Proceed to step S3.

[0170] S21. Operate normally according to the set operating mode of the air conditioning unit.

[0171] Since the indoor fan speed can also affect the temperature / pressure of the indoor heat exchanger, therefore, Figure 10As shown, the control module in this embodiment is also used to control the speed of the indoor fan. When the speed of the second outdoor fan is at the lower limit of the preset speed range, the control module first increases the speed of the indoor fan. When the speed of the indoor fan is increased to the maximum speed and the temperature / pressure of the indoor heat exchanger still exceeds the preset temperature / pressure range, the control module then controls the compressor frequency to decrease or stops.

[0172] like Figure 11 As shown, the control flow of the air conditioning unit in this embodiment is as follows:

[0173] S1, Begin.

[0174] S2. Determine whether the air conditioning unit is in heating mode. If yes, proceed to step S3; otherwise, proceed to step S23.

[0175] S3, the parameter detection module detects the parameters for entering the high-temperature heating mode.

[0176] S4. Determine whether the detected parameters meet the conditions for entering the high-temperature heating mode. If they do, proceed to step S5; otherwise, proceed to step S22.

[0177] S5. Control the first outdoor fan to stop running, and control the second outdoor fan to run within the preset speed range.

[0178] S6. Detect the temperature of the outdoor power module and the temperature / pressure of the indoor heat exchanger.

[0179] When the indoor heat exchanger temperature / pressure is within the preset temperature / pressure range and the outdoor power module temperature does not exceed the preset temperature, proceed to step S6.

[0180] When the indoor heat exchanger temperature / pressure is within the preset temperature / pressure range and the outdoor power module temperature exceeds the preset temperature, proceed to step S7.

[0181] When the indoor heat exchanger's heating temperature / pressure exceeds the preset temperature / pressure range and the outdoor power module's temperature exceeds the preset temperature, proceed to step S12.

[0182] If the temperature / pressure of the indoor heat exchanger exceeds the preset temperature / pressure range and the temperature of the outdoor power module does not exceed the preset temperature, proceed to step S15.

[0183] S7. Determine if the speed of the second outdoor fan is at the upper limit. If yes, proceed to step S8. If no, proceed to step S11.

[0184] S8. Determine if the compressor operating frequency is at its lowest value. If yes, proceed to step S10; otherwise, proceed to step S9.

[0185] S9. Control the compressor to reduce its frequency. Proceed to step S3.

[0186] S10, Control the compressor to stop.

[0187] S11. Control the speed of the second outdoor fan to increase. Proceed to step S3.

[0188] S12. Determine if the compressor operating frequency is at its lowest value. If yes, proceed to step S14; otherwise, proceed to step S13.

[0189] S13. Control the compressor to reduce frequency. Proceed to step S3.

[0190] S14. Control the compressor to stop.

[0191] S15. Determine if the speed of the second outdoor fan is at the lower limit. If yes, proceed to step S16. If no, proceed to step S21.

[0192] S16. Determine if the indoor fan is at its maximum speed. If not, proceed to step S17; otherwise, proceed to step S18.

[0193] S17. Increase the fan speed and proceed to step S3.

[0194] S18. Determine if the compressor operating frequency is at its lowest value. If yes, proceed to step S19; otherwise, proceed to step S20.

[0195] S19. Control the compressor to stop.

[0196] S20. Control the compressor to reduce its frequency. Proceed to step S3.

[0197] S21. Control the speed of the second outdoor fan to decrease. Proceed to step S3.

[0198] S22. The air conditioning unit operates normally in heating mode. Proceed to step S3.

[0199] S23. Operate normally according to the set operating mode of the air conditioning unit.

[0200] In this embodiment, the air conditioning unit can set a reasonable range of outdoor fan speed for high-temperature heating conditions. By optimizing the fan program control, the fan can operate reasonably under these conditions, ensuring the reliable operation of the air conditioning unit.

[0201] 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.

[0202] 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 conditioning unit, comprising an outdoor unit, characterized in that, The outdoor unit includes: case; A partition, located inside the housing, is used to divide the space inside the housing into a first chamber and a second chamber. The first chamber is used to house the compressor, and the second chamber is used to house the outdoor heat exchanger and the outdoor fan. An outdoor power module air inlet is located on the housing and communicates with the first chamber; A through-hole is located on the partition, and the through-hole is used to connect the first chamber and the second chamber; The outdoor power module is located inside the first cavity near the through hole; The outdoor fan is used to generate airflow that passes sequentially through the air inlet of the outdoor power module, the outdoor power module, and the through hole, and the airflow dissipates heat from the outdoor power module. The outdoor fan includes a first outdoor fan and a second outdoor fan, the second outdoor fan corresponding to the through hole. When the air conditioning unit is in heating operation, the first outdoor fan and the second outdoor fan are sequentially positioned in the refrigerant flow direction of the outdoor heat exchanger. The air conditioning unit includes: The storage module is used to store the conditions for entering the high-temperature heating mode; The parameter detection module is used to detect the parameters required to enter the high-temperature heating mode. The control module is used to control the first outdoor fan to stop running and control the second outdoor fan to run within a preset speed range when the parameters detected by the parameter detection module meet the conditions of the high-temperature heating mode and the air conditioning unit is in the heating mode. The air volume generated by the preset speed range of the second outdoor fan is less than the standard air volume. The control module is also used to control the air conditioning unit normally according to a preset heating or cooling mode when the parameters detected by the parameter detection module do not meet the conditions of the high-temperature heating mode.

2. The air conditioning apparatus according to claim 1, wherein The outdoor power module includes a heat dissipation module, which is opposite to the through hole.

3. The air conditioning device according to claim 1, characterized in that, The parameter detection module includes: Indoor ambient temperature detection module, used to detect indoor ambient temperature Tin; And / or, an outdoor ambient temperature detection module, used to detect the outdoor ambient temperature Tout; The conditions for entering the high-temperature heating mode include: the indoor ambient temperature Tin is higher than the preset indoor ambient temperature, and / or the outdoor ambient temperature Tout is higher than the preset outdoor ambient temperature.

4. The air conditioning device according to claim 3, characterized in that, The parameter detection module includes: Indoor heat exchanger temperature / pressure detection module, used to detect the temperature / pressure of the indoor heat exchanger; The conditions for entering the high-temperature heating mode include that the indoor heat exchanger temperature / pressure is higher than the set indoor heat exchanger temperature / pressure.

5. The air conditioning device according to claim 3, characterized in that, The air volume generated by the preset speed range of the second outdoor fan is 25%-35% of the standard air volume.

6. The air conditioning device according to any one of claims 1-5, characterized in that, The air conditioning unit includes: An outdoor power module temperature detection module is used to detect the temperature of the outdoor power module; The control module is used to control the speed of the second outdoor fan to increase and / or control the frequency of the compressor to decrease when the temperature of the outdoor power module exceeds a preset temperature during the high-temperature heating mode.

7. The air conditioning device according to claim 6, characterized in that, The air conditioning unit includes: an indoor heat exchanger temperature / pressure detection module, used to detect the temperature / pressure of the indoor heat exchanger; The control module is used to control the speed of the second outdoor fan to increase when the temperature / pressure of the indoor heat exchanger is within the preset temperature / pressure range and the temperature of the outdoor power module exceeds the preset temperature. The control module is used to control the compressor to reduce its frequency or stop when the indoor heat exchanger's heating temperature / pressure exceeds the preset temperature / pressure range and the outdoor power module's temperature exceeds the preset temperature. The control module is used to control the speed of the second outdoor fan to decrease when the temperature / pressure of the indoor heat exchanger exceeds the preset temperature / pressure range and the temperature of the outdoor power module does not exceed the preset temperature.

8. The air conditioning device according to claim 6, characterized in that, The control module is used to control the compressor to reduce its frequency or stop when the speed of the second outdoor fan is at the upper limit of the preset speed range and the temperature of the outdoor power module still exceeds the preset temperature. The control module is used to control the compressor to reduce its frequency or stop when the speed of the second outdoor fan is at the lower limit of the preset speed range and the temperature / pressure of the indoor heat exchanger exceeds the preset temperature / pressure range.

9. The air conditioning device according to claim 7 or 8, characterized in that, The control module is used to first increase the indoor fan speed when the second outdoor fan speed is at the lower limit of the preset speed range, and then control the compressor frequency to decrease or stop when the indoor fan speed is increased to the maximum speed and the temperature / pressure of the indoor heat exchanger still exceeds the preset temperature / pressure range.

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