Frequency converter assembly for air compressor, control method, air compressor and air conditioner

Abstract

The invention discloses a frequency converter assembly for an air compressor, a control method, the air compressor and an air conditioner. The heat exchange part is suitable for being attached to the frequency converter and carrying out heat exchange on the frequency converter; the cooler is provided with a first flow channel and a second flow channel which are isolated from each other and suitable for mutual heat exchange, the first flow channel is communicated with the heat exchange part, and the second flow channel is suitable for being communicated with a cooling water channel of the air compressor; the first temperature sensor is used for detecting the temperature of the first flow channel, the control valve is arranged in the second flow channel, and the control valve is electrically connected with the first temperature sensor and controls the flow of the second flow channel according to the temperature of the first flow channel, so that the condensation phenomenon can be avoided; and the frequency converter damage risk is reduced.

Description

Technical Field

[0001] The present application relates to the field of air conditioning, and in particular to a frequency converter assembly for an air compressor, a control method, an air compressor and an air conditioner. Background Art

[0002] In order to improve the heat dissipation efficiency of the inverter, the inverter began to use water cooling or liquid cooling for heat dissipation. This cooling method has many advantages. On the one hand, water cooling or liquid cooling can greatly improve the cooling efficiency of the inverter, thereby keeping the temperature of some modules of the inverter at a lower level, which can effectively increase the service life of some modules.

[0003] However, water-cooled or liquid-cooled inverters also have certain problems, that is, the temperature of the cold plate is often lower than the ambient temperature in the inverter cabinet for a long time. In high humidity environments, this situation is likely to cause condensation on the cold plate, and condensation will bring the risk of inverter damage. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a frequency converter assembly for an air compressor, which can avoid condensation and reduce the risk of frequency converter damage.

[0005] According to an embodiment of the present application, a frequency converter assembly for an air compressor includes: a frequency converter; a heat exchange portion, the heat exchange portion is suitable for being fitted with the frequency converter and suitable for exchanging heat with the frequency converter; a cooler, the cooler is provided with a first flow channel and a second flow channel which are isolated from each other and suitable for exchanging heat with each other, the first flow channel is connected to the heat exchange portion, and the second flow channel is suitable for being connected to a cooling water circuit of the air compressor; a first temperature sensor, the first temperature sensor is used to detect the temperature of the first flow channel, and a control valve, the control valve is arranged in the second flow channel, the control valve is electrically connected to the first temperature sensor and controls the flow rate of the second flow channel according to the temperature of the first flow channel.

[0006] According to an inverter assembly for an air compressor in an embodiment of the present application, a control valve controls the flow of the second flow channel according to the temperature of the first flow channel detected by the first temperature sensor. Since the first flow channel and the second flow channel can exchange heat with each other, when the flow in the second flow channel increases, the heat exchange efficiency is high and the temperature of the first flow channel decreases, and when the flow in the second flow channel decreases, the heat exchange efficiency is low and the temperature of the first flow channel increases. By adjusting the flow of the second flow channel according to the temperature of the first flow channel and further adjusting the temperature of the first flow channel, the temperature of the first flow channel can be kept within a relatively stable range, thereby avoiding the temperature of the first flow channel being too low, resulting in a large temperature difference on both sides of the heat exchange part and condensation, reducing the risk of the inverter being damaged by moisture and increasing the service life of the inverter.

[0007] According to some embodiments of the present application, the frequency converter assembly for an air compressor comprises: a first pipeline, the first pipeline is connected to the cooling water circuit of the air compressor, the second flow channel is formed in the first pipeline, and the control valve is arranged on the first pipeline; a second pipeline, the first flow channel is formed in the second pipeline, at least a part of the second pipeline is arranged around the outer periphery of the first pipeline, and the second pipeline exchanges heat with the first pipeline.

[0008] According to some embodiments of the present application, in the inverter assembly for an air compressor, the second pipeline includes: a coil, which is arranged around the outer circumference of the first pipeline; a first connecting pipe, one end of which is connected to the inlet of the coil, and the other end of which is connected to the outlet of the heat exchange part; a second connecting pipe, one end of which is connected to the outlet of the coil, and the other end of which is connected to the inlet of the heat exchange part; wherein the first temperature sensor is arranged at the outlet of the second connecting pipe or at the inlet of the heat exchange part.

[0009] According to some embodiments of the present application, the inverter assembly for an air compressor further includes: a water tank, which is connected to the second pipeline and has a water storage chamber formed inside for accommodating a heat exchange medium, and the water tank is provided with an air release valve which is unidirectionally connected to the water storage chamber in a discharge direction.

[0010] According to some embodiments of the present application, the inverter assembly for an air compressor further includes: a water pump, which is arranged in the second pipeline and is suitable for driving the flow of heat exchange medium in the second water circuit.

[0011] According to some embodiments of the present application, the inverter assembly for an air compressor further includes: a control cabinet, a containing chamber formed in the control cabinet, and the inverter is accommodated in the containing chamber; a second temperature sensor, the second temperature sensor is arranged in the containing chamber and is used to detect the temperature of the containing chamber, and the second temperature sensor is electrically connected to the control valve.

[0012] According to a control method of a frequency converter component in an embodiment of the present application, a frequency converter component for an air compressor is adopted, and the first temperature T1 of the heat exchange medium in the first flow channel is obtained through a first temperature sensor, and the ambient temperature T2 of the frequency converter and the set temperature T3 of the frequency converter are obtained through a second temperature sensor; the opening of the control valve is controlled to increase or decrease according to the first temperature T1, the ambient temperature T2 and the set temperature T3, and the first temperature T1 is maintained to satisfy: T2≤T1≤T3.

[0013] According to a control method of a frequency converter component of an embodiment of the present application, the first temperature T1 of the heat exchange medium in the first flow channel is accurately obtained through the first temperature sensor, the ambient temperature T2 of the frequency converter is obtained through the second temperature sensor, and the set temperature T3 of the frequency converter is clarified at the same time. The opening of the control valve is controlled to increase or decrease according to the temperature parameter, and it is ensured that the first temperature T1 satisfies T2≤T1≤T3. When the temperature is controlled within this range, the situation where the first temperature is too low can be effectively avoided. Because if the first temperature is too low T1, the moisture in the air will easily condense into water droplets at the inlet of the heat exchange part, that is, condensation will occur. And this control method ensures that the temperature will not drop to a level that easily causes condensation by reasonably adjusting the flow rate of the cooling fluid.

[0014] According to the control method of the inverter component of some embodiments of the present application, when the first temperature T1 is greater than the set temperature T3, the opening of the control valve is increased to exchange heat with the first flow channel through the second flow channel and reduce the temperature of the heat exchange medium in the first flow channel.

[0015] According to the control method of the inverter component in some embodiments of the present application, when the first temperature T1 is lower than the ambient temperature T2, the opening of the control valve is controlled to decrease so as to reduce the heat exchange amount between the second flow channel and the first flow channel and increase the temperature of the heat exchange medium in the first flow channel.

[0016] The following is a brief description of the air compressor according to an embodiment of the present application.

[0017] The air compressor according to the embodiment of the present application includes the inverter assembly described in any of the above embodiments. Since the inverter assembly described in any of the above embodiments is provided on the air compressor according to the present embodiment, the inverter assembly with the specific structure and control method is provided on the air compressor. When the inverter generates heat during operation, the heat exchange part quickly absorbs the heat and transfers it to the first flow channel of the cooler. The first temperature sensor monitors the temperature of the first flow channel in real time. The control valve controls the flow of the second flow channel according to the temperature signal to ensure that the temperature of the first flow channel always meets the range requirements between the ambient temperature and the set temperature. Temperature control makes the inverter always at a suitable operating temperature, and neither the performance and life of the inverter 1 will be affected by excessive temperature, nor condensation will occur due to the excessively low temperature at the inlet of the heat exchange part. For the air compressor, the stable operation of the inverter, its core component, is crucial. The inverter that is not prone to condensation can effectively avoid problems such as short circuit and corrosion of electronic components caused by condensation, greatly improving the reliability and stability of the air compressor.

[0018] The following is a brief description of the air conditioner according to the embodiment of the present application.

[0019] The air conditioner according to the embodiment of the present application includes the air compressor described in the above embodiment. Since the air conditioner according to the present embodiment is provided with the air compressor described in the above embodiment, since the air conditioner is provided with the above air compressor, the temperature control of the air compressor ensures that the frequency converter, the core component of the air compressor, always works within a suitable temperature range, so that the air compressor can operate stably, providing a continuous and reliable compressed air power source for the air conditioner. Since the stability of the operation of the air compressor is improved, the overall operation stability and reliability of the air conditioner are also improved, and the air conditioner shutdown or performance degradation caused by air compressor failure is reduced. The air compressor is not prone to condensation, and the problems of short circuit and corrosion of electronic components caused by condensation are avoided. This not only prolongs the service life of the air compressor, but also reduces the potential risk of damage to other related components in the air conditioner. Without the trouble of condensation problems, the air conditioner can operate more safely and efficiently under various environmental conditions.

[0020] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 It is a structural schematic diagram of a frequency converter assembly for an air compressor according to an embodiment of the present application;

[0023] Figure 2 It is a flowchart of a control method of a frequency converter component according to an embodiment of the present application.

[0024] Reference numerals:

[0025] 100. Inverter components;

[0026] 1. Frequency converter; 2. Heat exchange unit;

[0027] 3. Cooler; 31. First pipeline;

[0028] 32. Second pipeline;

[0029] 321, first connecting pipe;

[0030] 322, second connecting pipe;

[0031] 4. Control valve;

[0032] 5. Water pump;

[0033] 6. Water tank; 61. Air release valve; 62. Plug. DETAILED DESCRIPTION

[0034] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0035] According to an embodiment of the present application, an inverter assembly 100 for an air compressor includes: an inverter 1, a heat exchange part 2, a cooler 3, a first temperature sensor and a control valve 4, wherein the heat exchange part 2 is suitable for being fitted with the inverter 1 and suitable for exchanging heat with the inverter 1, the cooler 3 is provided with a first flow channel and a second flow channel which are isolated from each other and suitable for exchanging heat with each other, the first flow channel is connected with the heat exchange part 2, the second flow channel is suitable for being connected with the cooling water circuit of the air compressor, the first temperature sensor is used to detect the temperature of the first flow channel, the control valve 4 is provided in the second flow channel, the control valve 4 is electrically connected with the first temperature sensor and controls the flow of the second flow channel according to the temperature of the first flow channel.

[0036] First, the inverter assembly 100 in the embodiment of the present application includes an inverter 1, a heat exchange unit 2, a cooler 3, a first temperature sensor and a control valve 4. The heat exchange unit 2 fits with the inverter 1 to exchange heat with the inverter 1. The cooler 3 has a first flow channel and a second flow channel that are isolated from each other and can exchange heat with each other. The first flow channel is connected to the heat exchange unit 2, and the second flow channel is suitable for connecting to the cooling water circuit of the air compressor. The first temperature sensor is used to detect the temperature of the first flow channel. The control valve 4 is arranged in the second flow channel and is electrically connected to the first temperature sensor, and can control the flow of the second flow channel according to the temperature of the first flow channel.

[0037] Then, when the inverter 1 continues to work, heat continues to accumulate, and the temperature of the first flow channel rises, the first temperature sensor will transmit the temperature signal to the control valve 4. It ensures that the inverter component 100 can respond to temperature changes in a timely manner. If the temperature of the first flow channel is high, the control valve 4 will increase the flow of the second flow channel to allow more cooling fluid from the air compressor cooling water circuit to enter the cooler 3. This method of dynamically adjusting the cooling fluid flow according to the actual temperature can efficiently cool the inverter 1 to avoid affecting its normal operation due to excessive temperature. If the temperature of the first flow channel is low, condensation will appear at the water inlet end of the heat exchange plate. To avoid the occurrence of condensation, the control valve 4 will reduce the flow of the second flow channel, reduce the cooling fluid from the air compressor cooling water circuit entering the cooler 3, slow down the heat exchange rate, and increase the temperature of the first flow channel, thereby preventing condensation, reducing the risk of damage to the inverter 1 due to moisture, and increasing the service life of the inverter 1.

[0038] The cooling fluid in the second flow channel of the cooler 3 exchanges heat with the fluid in the first flow channel to reduce the temperature of the first flow channel, and then reduces the temperature of the inverter 1 through the heat exchange unit 2, thereby achieving effective cooling of the inverter 1 and ensuring the normal and stable operation of the inverter 1. At the same time, since the entire cooling process is based on the monitoring of the first temperature sensor and the control of the control valve 4, the temperature can always be controlled within a reasonable range to avoid condensation caused by excessively low temperature. Condensation can damage the electronic components of the inverter 1 and affect its performance and lifespan. The temperature monitoring of the inverter component 100 effectively avoids this problem and can improve the reliability and stability of the inverter component 100.

[0039] It should be noted that the applicable scenarios of the inverter assembly 100 in the embodiment of the present application are central air conditioners, air conditioning units, etc. In systems such as central air conditioners and air conditioning units, it is usually necessary to equip equipment such as air compressors, and the flow and temperature of their cooling water circuits are relatively stable. By connecting the second flow channel of the inverter assembly 100 with the cooling water circuit of the air compressor, the pressure and flow of the cooling water circuit of the air compressor can be used to ensure that the cooling fluid can stably flow through the cooler 3 and exchange heat with the first flow channel, thereby effectively reducing the temperature of the inverter 1.

[0040] According to some embodiments of the inverter assembly 100 for an air compressor of the present application, the cooler 3 includes a first pipeline 31 and a second pipeline 32. The first pipeline 31 is connected to the cooling water circuit of the air compressor. A second flow channel is formed in the first pipeline 31. A control valve 4 is provided on the first pipeline 31. A first flow channel is formed in the second pipeline 32. At least a portion of the second pipeline 32 is arranged around the outer periphery of the first pipeline 31. The second pipeline 32 exchanges heat with the first pipeline 31.

[0041] The cooler 3 is composed of a first pipeline 31 and a second pipeline 32, wherein the first pipeline 31 is connected to the cooling water circuit of the air compressor, a second flow channel is formed in the first pipeline 31, and a control valve 4 is provided on the first pipeline 31. This enables the cooler 3 to use the cooling resources of the air compressor to cool the inverter 1.

[0042] A first flow channel is formed in the second pipeline 32, and at least a portion of the second pipeline 32 is disposed around the outer periphery of the first pipeline 31. This allows the second pipeline 32 to fully exchange heat with the first pipeline 31. When the inverter 1 generates heat during operation, the heat is transferred to the fluid in the second pipeline 32. Since the second pipeline 32 is disposed around the outer periphery of the first pipeline 31, the cooling fluid in the first pipeline 31 can efficiently exchange heat with the fluid in the second pipeline 32, thereby reducing the temperature of the fluid in the second pipeline 32.

[0043] According to some embodiments of the inverter assembly 100 for an air compressor of the present application, the second pipeline 32 includes a coil, a first connecting pipe 321 and a second connecting pipe 322, the coil is arranged around the outer circumference of the first pipeline 31, one end of the first connecting pipe 321 is connected to the inlet of the coil, the other end of the first connecting pipe 321 is connected to the outlet of the heat exchange part 2, one end of the second connecting pipe 322 is connected to the outlet of the coil, and the other end of the second connecting pipe 322 is connected to the inlet of the heat exchange part 2; wherein the first temperature sensor is arranged at the outlet of the second connecting pipe 322 or at the inlet of the heat exchange part 2.

[0044] The coil is arranged around the outer circumference of the first pipeline 31. This layout can maximize the heat exchange with the cooling fluid in the first pipeline 31. The first connecting pipe 321 connects the inlet of the coil with the outlet of the heat exchange part 2, so that the fluid that absorbs the heat of the inverter 1 through the heat exchange part 2 can flow smoothly into the coil. One end of the second connecting pipe 322 is connected to the outlet of the coil, and the other end is connected to the inlet of the heat exchange part 2, forming a complete circulation loop. In this loop, the fluid continuously flows between the heat exchange part 2, the first connecting pipe 321, the coil and the second connecting pipe 322, realizing the continuous transfer and cooling of the heat of the inverter 1. The first temperature sensor is set at the outlet of the second connecting pipe 322 or at the inlet of the heat exchange part 2, so that the temperature of the fluid about to enter the heat exchange part 2 or just flowing out of the coil can be directly detected, which can reflect the working state of the cooler 3 and the cooling effect on the inverter 1.

[0045] According to some embodiments of the present application, the inverter assembly 100 for an air compressor further includes a water tank 6, which is connected to the second pipeline 32 and has a water storage chamber formed therein for accommodating a heat exchange medium. The water tank 6 is provided with an air release valve 61 which is unidirectionally connected to the water storage chamber in a discharge direction.

[0046] The addition of the water tank 6 further optimizes the performance of the entire inverter assembly 100. The water tank 6 is connected to the second pipeline 32, and a water storage chamber for accommodating a heat exchange medium is formed inside, which provides a stable source of heat exchange medium for the heat exchange process. During the operation of the inverter assembly 100, gas may be mixed into the heat exchange medium. If these gases are not discharged in time, the heat exchange efficiency will be affected. The one-way conduction characteristic of the air vent 61 ensures that the gas can be discharged from the inverter assembly 100 without allowing external air to enter, thereby ensuring the purity and stability of the heat exchange medium in the water storage chamber. When gas accumulation occurs in the inverter assembly 100, the air vent 61 can be opened to discharge the gas, thereby maintaining the normal operating pressure and heat exchange effect of the inverter assembly 100. This helps to improve the reliability and stability of the inverter assembly 100 and reduce failures and maintenance costs caused by gas accumulation.

[0047] It should be noted that the water tank 6 is also provided with a plug 62 connected to the water storage chamber, and the plug 62 can seal the water tank 6. For example, when the water tank 6 needs to be maintained, repaired or the heat exchange medium needs to be replaced, the plug 62 can effectively prevent the heat exchange medium from leaking, making it easier for the staff to operate. During the normal operation of the system, the plug 62 can also play a sealing role, ensuring that the heat exchange medium in the water tank 6 will not be contaminated or leaked due to external factors. This helps to maintain the stability and reliability of the system.

[0048] According to some embodiments of the present application, the inverter assembly 100 for an air compressor further includes a water pump 5 , which is disposed in the second pipeline 32 and is suitable for driving the heat exchange medium in the second water circuit to flow.

[0049] The water pump 5 is arranged in the second pipeline 32, and is responsible for driving the heat exchange medium in the second water circuit to flow. The existence of the water pump 5 ensures that the heat exchange medium can circulate continuously and stably in the entire inverter assembly 100. When the inverter 1 generates heat during operation, the heat exchange medium absorbs heat from the heat exchange part 2 under the promotion of the water pump 5, and then flows into the coil and other parts in the second pipeline 32. Through heat exchange with the cooling fluid from the air compressor cooling water circuit in the first pipeline 31, the temperature of the heat exchange medium is reduced, and then it flows back to the heat exchange part 2 to continue to absorb the heat of the inverter 1, and the cycle repeats.

[0050] At the same time, the water pump 5 can also adjust the flow rate and flow rate of the heat exchange medium according to actual needs, so as to achieve more precise control of the cooling effect of the inverter 1. Under different working conditions, such as changes in the load of the inverter 1, changes in the ambient temperature, etc., the water pump 5 can adjust its own operating parameters to ensure that the heat exchange medium always flows at a suitable speed to achieve the best cooling effect. With the drive of the water pump 5, the entire inverter assembly 100 is more efficient and stable, and can promptly and effectively take away the heat generated by the inverter 1, ensuring that the inverter 1 operates within a safe temperature range, and extending the service life of the inverter 1.

[0051] According to some embodiments of the present application, the inverter assembly 100 for an air compressor further includes a control cabinet and a second temperature sensor. A storage compartment is formed in the control cabinet, and the inverter 1 is accommodated in the storage compartment. The second temperature sensor is arranged in the storage compartment and is used to detect the temperature of the storage compartment. The second temperature sensor is electrically connected to the control valve 4.

[0052] A storage compartment is formed in the control cabinet, and the inverter 1 is stored therein, providing a relatively independent and protected space for the inverter 1. The second temperature sensor is arranged in the storage compartment, and its main function is to detect the temperature of the storage compartment. By real-time monitoring of the temperature of the storage compartment, the temperature condition of the environment where the inverter 1 is located can be more directly understood. Since the temperature of the surrounding environment of the inverter 1 has an important influence on its performance and life during operation, it is very important to accurately grasp the temperature of the storage compartment.

[0053] Then, the second temperature sensor is electrically connected to the control valve 4. The purpose is to compare the temperature with the temperature of the first temperature sensor. By comparing the readings of the two temperature sensors, the temperature of the inverter 1 and its surrounding environment can be more accurately grasped. When the first temperature sensor detects that the temperature of the heat exchange medium in the first flow channel is too different from the temperature of the storage bin detected by the second temperature sensor, the inverter assembly 100 can respond in time. If the temperature difference is too large, it means that there may be uneven temperature, which will increase the risk of condensation.

[0054] Then, in order to avoid condensation caused by excessive temperature difference, the control valve 4 can be adjusted accordingly according to the comparison results of the two temperature sensors. When the temperature difference is close to the critical value that may cause condensation, the control valve 4 can adjust the flow of the second flow channel to balance the temperature of different parts. For example, if the temperature of the first flow channel is too low and the temperature of the storage chamber is high, the control valve 4 can reduce the flow of the second flow channel and reduce the cooling effect, thereby increasing the temperature of the first flow channel and reducing the temperature difference. The electronic components of the inverter 1 and the stability of the entire inverter assembly 100 can be protected.

[0055] According to a control method of a frequency converter component 100 in an embodiment of the present application, a frequency converter component 100 for an air compressor is adopted, and a first temperature T1 of a heat exchange medium in a first flow channel is obtained through a first temperature sensor, and an ambient temperature T2 of the frequency converter 1 and a set temperature T3 of the frequency converter 1 are obtained through a second temperature sensor; the opening of the control valve 4 is controlled to increase or decrease according to the first temperature T1, the ambient temperature T2 and the set temperature T3, and the first temperature T1 is maintained to satisfy: T2≤T1≤T3.

[0056] The first temperature T1 of the heat exchange medium in the first flow channel is obtained through the first temperature sensor, the ambient temperature T2 of the inverter 1 is obtained through the second temperature sensor, and the set temperature T3 of the inverter 1 is determined. This provides a comprehensive data basis for achieving precise temperature control. The opening of the control valve 4 is controlled to increase or decrease according to these temperature parameters, and the first temperature T1 is always kept to satisfy T2≤T1≤T3. Such control logic can ensure that the temperature of the inverter 1 and its surrounding environment is within a reasonable range. When the first temperature T1 is less than the ambient temperature T2, it means that the current heat exchange may be excessive. When the first temperature T1 is greater than the set temperature T3, it means that the current heat exchange may be insufficient. In the above two cases, the opening of the control valve 4 needs to be increased or decreased to adjust the first temperature T1.

[0057] When the first temperature T1 is controlled within the range of T2≤T1≤T3, the situation where the first temperature T1 is too low can be effectively avoided. Because if the first temperature T1 is too low, the moisture in the air will easily condense into water droplets at the inlet of the heat exchange part 2, that is, condensation will occur. However, this control method ensures that the temperature will not drop to a level that easily causes condensation by reasonably adjusting the flow rate of the cooling fluid.

[0058] According to the control method of the inverter assembly 100 of some embodiments of the present application, when the first temperature T1 is greater than the set temperature T3, the opening of the control valve 4 is increased to exchange heat with the first flow channel through the second flow channel and reduce the temperature of the heat exchange medium in the first flow channel.

[0059] When the first temperature T1 is greater than the set temperature T3, the opening of the control valve 4 is increased. As the opening of the control valve 4 increases, more cooling fluid from the air compressor cooling water circuit can enter the second flow channel. Since the second flow channel in the cooler 3 can exchange heat with the first flow channel, a large amount of cooling fluid can fully exchange heat with the heat exchange medium in the first flow channel. Through this heat exchange, the temperature of the heat exchange medium in the first flow channel can be effectively reduced. The first flow channel is connected to the heat exchange part 2. When the temperature of the heat exchange medium in the first flow channel decreases, the temperature of the inverter 1 will be further reduced through the heat exchange part 2. Although the cooling is enhanced, it is adjusted according to the reasonable change of temperature, and the temperature will not be excessively reduced to the extent that condensation is easily generated.

[0060] According to the control method of the inverter assembly 100 of some embodiments of the present application, when the first temperature T1 is lower than the ambient temperature T2, the opening of the control valve 4 is controlled to decrease to reduce the heat exchange amount between the second flow channel and the first flow channel and increase the temperature of the heat exchange medium in the first flow channel.

[0061] When the first temperature T1 is lower than the ambient temperature T2, the opening of the control valve 4 is controlled to decrease. As the opening of the control valve 4 decreases, the flow rate of the cooling fluid from the air compressor cooling water circuit into the second flow channel decreases, thereby reducing the heat exchange between the second flow channel and the first flow channel. In this way, overcooling can be avoided, so that the temperature of the heat exchange medium in the first flow channel will not be too low. By reducing the heat exchange, the temperature of the heat exchange medium in the first flow channel can be gradually increased. Since the first flow channel is connected to the heat exchange part 2, increasing the temperature of the heat exchange medium in the first flow channel can avoid the temperature of the inverter 1 being too low, and ensure that the inverter 1 operates within an appropriate temperature range. In this way, the temperature of the heat exchange medium in the first flow channel can be prevented from being too low, thereby preventing the moisture in the air from condensing into water droplets on the surface of the inverter component 100 due to the low temperature, that is, condensation.

[0062] The following is a brief description of the air compressor according to an embodiment of the present application.

[0063] The air compressor according to the embodiment of the present application includes the inverter assembly 100 of any of the above embodiments. Since the inverter assembly 100 of any of the above embodiments is provided on the air compressor according to the present embodiment, therefore, since the inverter assembly 100 with the specific structure and control method is provided on the air compressor, when the inverter 1 generates heat during operation, the heat exchange part 2 quickly absorbs the heat and transfers it to the first flow channel of the cooler 3, the first temperature sensor monitors the temperature of the first flow channel in real time, and the control valve 4 controls the flow of the second flow channel according to the temperature signal to ensure that the temperature of the first flow channel always meets the range requirement between the ambient temperature and the set temperature. Temperature control makes the inverter 1 always at a suitable operating temperature, and neither the performance and life of the inverter 1 will be affected by excessive temperature, nor condensation will occur due to excessively low temperature at the inlet of the heat exchange part 2. For the air compressor, the stable operation of the inverter 1, its core component, is crucial. The inverter 1, which is not prone to condensation, can effectively avoid problems such as short circuit and corrosion of electronic components caused by condensation, and greatly improves the reliability and stability of the air compressor.

[0064] The following is a brief description of the air conditioner according to the embodiment of the present application.

[0065] The air conditioner according to the embodiment of the present application includes the air compressor described in the above embodiment. Since the air conditioner according to the present embodiment is provided with the air compressor described in the above embodiment, since the air conditioner is provided with the above air compressor, the temperature control of the air compressor ensures that the frequency converter, the core component of the air compressor, always works within a suitable temperature range, so that the air compressor can operate stably, providing a continuous and reliable compressed air power source for the air conditioner. Since the stability of the operation of the air compressor is improved, the overall operation stability and reliability of the air conditioner are also improved, and the air conditioner shutdown or performance degradation caused by air compressor failure is reduced. The air compressor is not prone to condensation, and the problems of short circuit and corrosion of electronic components caused by condensation are avoided. This not only prolongs the service life of the air compressor, but also reduces the potential risk of damage to other related components in the air conditioner. Without the trouble of condensation problems, the air conditioner can operate more safely and efficiently under various environmental conditions.

[0066] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0067] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0068] In the description of the present application, “plurality” means two or more.

[0069] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0070] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0071] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0072] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A frequency converter assembly for an air compressor, characterized in that: include: Frequency converter (1); A heat exchange portion (2), the heat exchange portion (2) being adapted to fit the frequency converter (1) and to perform heat exchange on the frequency converter (1); A cooler (3), the cooler (3) being provided with a first flow channel and a second flow channel which are isolated from each other and suitable for exchanging heat with each other, the first flow channel being connected to the heat exchange portion (2), and the second flow channel being suitable for connecting to a cooling water path of an air compressor; a first temperature sensor, the first temperature sensor being used to detect the temperature of the first flow channel; A control valve (4), the control valve (4) is arranged in the second flow channel, the control valve (4) is electrically connected to the first temperature sensor and controls the flow rate of the second flow channel according to the temperature of the first flow channel.

2. The frequency converter assembly for an air compressor according to claim 1, characterized in that: The cooler (3) comprises: a first pipeline (31), the first pipeline (31) being in communication with a cooling water path of the air compressor, the second flow channel being formed in the first pipeline (31), and the control valve (4) being arranged on the first pipeline (31); A second pipeline (32), wherein the first flow channel is formed in the second pipeline (32), at least a portion of the second pipeline (32) is arranged around the outer periphery of the first pipeline (31), and the second pipeline (32) exchanges heat with the first pipeline (31).

3. The frequency converter assembly for an air compressor according to claim 2, characterized in that: The second pipeline (32) comprises: a coil, the coil being arranged around the outer circumference of the first pipeline (31); a first connecting pipe (321), one end of the first connecting pipe (321) being connected to the inlet of the coil, and the other end of the first connecting pipe (321) being connected to the outlet of the heat exchange part (2); a second connecting pipe (322), one end of which is connected to the outlet of the coil, and the other end of which is connected to the inlet of the heat exchange part (2); The first temperature sensor is arranged at the outlet of the second connecting pipe (322) or at the inlet of the heat exchange part (2).

4. The frequency converter assembly for an air compressor according to claim 2, characterized in that: Also includes: A water tank (6), the water tank (6) being in communication with the second pipeline (32) and having a water storage chamber formed therein for accommodating a heat exchange medium, the water tank (6) being provided with an air release valve (61) which is in unidirectional communication with the water storage chamber in a discharge direction.

5. The frequency converter assembly for an air compressor according to claim 2, characterized in that: Also includes: A water pump (5), the water pump (5) being arranged in the second pipeline (32) and being suitable for driving the heat exchange medium in the second pipeline (32) to flow.

6. The frequency converter assembly for an air compressor according to claim 2, characterized in that: Also includes: A control cabinet, wherein a storage compartment is formed in the control cabinet, and the frequency converter (1) is stored in the storage compartment; A second temperature sensor is disposed in the containing chamber and is used to detect the temperature of the containing chamber. The second temperature sensor is electrically connected to the control valve (4).

7. A control method for a frequency converter assembly according to any one of claims 1 to 6, characterized in that: include: Acquiring a first temperature T1 of the heat exchange medium in the first flow channel through a first temperature sensor, and acquiring an ambient temperature T2 of the frequency converter (1) and a set temperature T3 of the frequency converter (1) through a second temperature sensor; The opening degree of the control valve (4) is controlled to increase or decrease according to the first temperature T1, the ambient temperature T2 and the set temperature T3, and the first temperature T1 is maintained to satisfy: T2≤T1≤T3.

8. The control method of the frequency converter assembly according to claim 7, characterized in that: When the first temperature T1 is greater than the set temperature T3, the opening of the control valve (4) is increased to exchange heat with the first flow channel through the second flow channel and reduce the temperature of the heat exchange medium in the first flow channel.

9. The control method of the frequency converter assembly according to claim 7, characterized in that: When the first temperature T1 is lower than the ambient temperature T2, the opening of the control valve (4) is controlled to decrease so as to reduce the heat exchange amount between the second flow channel and the first flow channel and to increase the temperature of the heat exchange medium in the first flow channel.

10. An air compressor, characterized in that: The invention comprises the frequency converter assembly (100) as claimed in any one of claims 1 to 6.

11. An air conditioner, characterized in that: Including the air compressor described in claim 10.

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