Frequency converter, refrigeration equipment and control method of refrigeration equipment

Abstract

The invention relates to the technical field of refrigeration equipment, in particular to a frequency converter, refrigeration equipment and a control method of the refrigeration equipment, and aims to solve the problem that an existing frequency converter is prone to dew formation during cooling. The frequency converter comprises a cabinet body, wherein a heat exchange assembly is arranged in the cabinet body; the cooling pipeline communicates with the heat exchange assembly, and a refrigerant is introduced into the cooling pipeline; a control valve; the temperature monitoring element is used for monitoring the environment temperature in the cabinet body; the humidity monitoring element is used for monitoring the environment humidity in the cabinet body; and the controller is electrically connected with the control valve, and the controller controls the opening degree of the control valve according to the environment temperature and the environment humidity so as to adjust the amount of the refrigerant entering the cooling pipeline. According to the invention, the temperature monitoring element and the humidity monitoring element are arranged in the cabinet body of the frequency converter, so that the controller can obtain the dew point temperature value of the internal environment of the cabinet body, and the possibility of occurrence of a dew formation phenomenon is reduced by combining the environment temperature in the cabinet body and adjusting the opening and closing and the opening degree of the control valve.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and specifically provides a frequency converter, refrigeration equipment and a control method for refrigeration equipment. Background Art

[0002] Refrigeration equipment uses inverters to control and adjust the operating frequency of the compressor unit to adapt to varying loads. However, inverters generate heat during operation. If heat isn't effectively dissipated, the inverter's temperature will continue to rise, exceeding its maximum temperature limit. This can affect the functionality of the inverter's components and even damage them. Therefore, ensuring effective heat dissipation from the inverter is crucial for stable operation of refrigeration equipment.

[0003] To address heat dissipation, some related technologies typically use refrigerant to cool the inverter. However, this current refrigerant cooling process presents a problem. In high-humidity environments, the airtightness of the inverter cabinet is poor, allowing some moist air to enter the system. If this cooler refrigerant enters the inverter, it can cause condensation on the refrigerant supply lines or surfaces of components such as the cooling plate. This accumulated condensation can damage the inverter's internal components.

[0004] Accordingly, the art requires a new cooling solution for the inverter to solve the above problems. Summary of the Invention

[0005] The present invention aims to solve the above technical problem, that is, to solve the problem that condensation is easily generated when the existing frequency converter is cooled.

[0006] In a first aspect, the present invention provides a frequency converter, comprising:

[0007] a cabinet body, in which a heat exchange component is arranged;

[0008] A cooling pipeline, wherein the heat exchange component is connected and arranged in the cooling pipeline, and the cooling pipeline is used to pass a refrigerant;

[0009] a control valve connected to the inlet end of the cooling pipeline;

[0010] a temperature monitoring element, which is disposed in the cabinet and is used to monitor the ambient temperature in the cabinet;

[0011] A humidity monitoring element is provided in the cabinet and is used to monitor the ambient humidity in the cabinet;

[0012] A controller is electrically connected to the control valve, and the controller controls the opening of the control valve according to the ambient temperature and the ambient humidity to adjust the amount of refrigerant entering the cooling pipeline.

[0013] Optionally, the cooling pipeline includes a first pipeline and a second pipeline arranged in parallel, and the heat exchange assembly includes a first heat exchange device and a second heat exchange device, the first heat exchange device is communicatively arranged in the first pipeline, and the second heat exchange device is communicatively arranged in the second pipeline;

[0014] The first heat exchange device is disposed in the cabinet and is used to exchange heat for the internal space of the cabinet. The second heat exchange device is disposed near the power module of the inverter and is used to exchange heat for the power module.

[0015] Optionally, the control valve includes a first control valve and a second control valve, the first control valve is connected and arranged in the first pipeline, and the second control valve is connected and arranged in the second pipeline, and the controller controls the opening of the first control valve and the second control valve according to the ambient temperature and the ambient humidity to adjust the amount of refrigerant entering the first pipeline and the second pipeline respectively.

[0016] Optionally, the temperature monitoring element includes a first temperature monitoring element and a second temperature monitoring element. The first temperature monitoring element is arranged in the cabinet to monitor the temperature of the space inside the cabinet. The second temperature monitoring element is arranged near the second heat exchange device to monitor the temperature of the space around the second heat exchange device.

[0017] Optionally, the humidity monitoring element is a humidity sensor or a dew point meter.

[0018] In a second aspect, the present invention provides a refrigeration device comprising:

[0019] In the frequency converter according to any one of the first aspects, an inlet end of the cooling pipeline is connected to a condenser of the refrigeration equipment, and an outlet end of the cooling pipeline is connected to an evaporator of the refrigeration equipment.

[0020] In a third aspect, the present invention provides a method for controlling a refrigeration device, the refrigeration device comprising:

[0021] The inverter has a heat exchange component provided in its cabinet;

[0022] A cooling pipeline, wherein the heat exchange component is connected and arranged in the cooling pipeline, and the cooling pipeline is used to pass a refrigerant;

[0023] a control valve connected to the inlet end of the cooling pipeline;

[0024] a temperature monitoring element, which is disposed in the cabinet and is used to monitor the ambient temperature in the cabinet;

[0025] A humidity monitoring element is provided in the cabinet and is used to monitor the ambient humidity in the cabinet;

[0026] a controller electrically connected to the control valve, the controller controlling the opening of the control valve according to the ambient temperature and the ambient humidity to adjust the amount of refrigerant entering the cooling pipeline;

[0027] The control method includes:

[0028] Acquire the ambient temperature inside the cabinet;

[0029] Obtaining the dew point temperature inside the cabinet;

[0030] The opening of the control valve is controlled according to the dew point temperature and the ambient temperature to adjust the ambient temperature to a target temperature value.

[0031] Optionally, the target temperature value is the sum of the dew point temperature value and a first preset value.

[0032] Optionally, the step of “controlling the opening of the control valve according to the dew point temperature and the ambient temperature to adjust the ambient temperature to a target temperature value” includes:

[0033] When the ambient temperature is lower than the first preset temperature value, when the sum of the dew point temperature and the second preset value is less than or equal to the first preset temperature value, the target temperature value is controlled to be the sum of the dew point temperature and the second preset value; when the sum of the dew point temperature and the second preset value is greater than the first preset temperature value, the target temperature value is controlled to be the first preset temperature value.

[0034] Optionally, the step of “controlling the opening of the control valve according to the dew point temperature and the ambient temperature to adjust the ambient temperature to a target temperature value” further includes:

[0035] When the dew point temperature is lower than the second preset temperature value, the target temperature value is controlled to be the third preset temperature value.

[0036] The above one or more technical solutions of the present invention have at least one or more of the following Beneficial effects:

[0037] In this embodiment, by setting temperature monitoring elements and humidity monitoring elements inside the inverter cabinet, the inverter cooling system can accurately obtain the specific conditions of the current environmental conditions inside the cabinet, especially the dew point temperature value of the internal environment of the cabinet. Combined with the ambient temperature value inside the cabinet at this time, the controller dynamically adjusts the opening and closing and opening of the control valve through the control algorithm, thereby accurately controlling the amount of refrigerant entering the cooling pipeline.

[0038] The control method provided in this embodiment can adjust the target temperature value based on the actual dew point temperature, ensuring that the target temperature value is always greater than the dew point temperature value, thereby effectively preventing the occurrence of condensation. Furthermore, the controller can also adjust the preset target temperature based on the actual ambient temperature, thereby saving refrigerant consumption and improving the energy efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0040] Figure 1 1 is a schematic structural diagram of a cooling system of a frequency converter provided in an embodiment of the present invention;

[0041] Figure 2 Schematic diagram of the internal structure of the cabinet of the frequency converter provided in an embodiment of the present invention;

[0042] Figure 3 Schematic diagram of the structure of the external interface of the cabinet of the frequency converter provided in an embodiment of the present invention;

[0043] Figure 4 is a structural schematic diagram of a first heat exchange device provided in an embodiment of the present invention;

[0044] Figure 5 2 is a schematic structural diagram of a power module and a second heat exchange device provided in an embodiment of the present invention;

[0045] Figure 6 1 is a schematic diagram of the main steps of the control method of the refrigeration equipment provided in an embodiment of the present invention;

[0046] Figure 7 Detailed steps of the control method of the refrigeration equipment provided in the embodiment of the present invention are shown in FIG. List of reference numerals:

[0047] 11-cabinet, 12-power module, 131-first heat exchange device, 132-second heat exchange device, 141-first pipeline, 1411-first interface, 1412-second interface, 142-second pipeline, 1421-third interface, 1422-fourth interface, 151-first control valve, 152-second control valve, 161-first temperature monitoring element, 162-second temperature monitoring element, 17-humidity monitoring element, 18-condenser, 19-evaporator, 20-drain outlet. DETAILED DESCRIPTION

[0048] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are intended only to illustrate the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art may adjust these embodiments as needed to suit specific applications.

[0049] It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These are used solely for ease of description and are not intended to indicate or imply that the relevant devices or components must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, ordinal numbers such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0050] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted" and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0051] Please refer to Figure 1-5 An embodiment of the present invention provides an inverter having a heat exchange assembly disposed within a cabinet 11 of the inverter. The heat exchange assembly is connected to a cooling pipeline. Refrigerant is introduced into the cooling pipeline, enabling the heat exchange assembly to effectively cool the interior of the cabinet 11. A control valve is also disposed at the inlet of the cooling pipeline. The opening and closing of the control valve can effectively control the amount of refrigerant entering the cooling pipeline.

[0052] Furthermore, a temperature monitoring element is provided in the cabinet 11 for monitoring the ambient temperature in the cabinet 11. The temperature monitoring element can be a temperature sensor, which can feed back the temperature of the environment in the cabinet 11 to the controller, so that the controller can easily obtain the real-time temperature of the environment inside the cabinet 11.

[0053] Furthermore, a humidity monitoring element 17 is provided in the cabinet 11 for monitoring the ambient humidity in the cabinet 11 .

[0054] In one embodiment, the humidity monitoring element 17 may be a humidity sensor, which may feed back the humidity inside the cabinet 11 to the controller. Based on the humidity value, the controller calculates the dew point temperature value of the environment inside the cabinet 11 according to an algorithm.

[0055] In another embodiment, humidity monitoring element 17 can be a dew point meter. A dew point meter is an instrument used to measure the dew point temperature of air. The dew point temperature refers to the temperature at which saturated water vapor in the air begins to condense into dew. When the air temperature drops to or below the dew point temperature, the water vapor in the air condenses into water droplets or dew. By measuring the temperature and humidity of the air, the dew point meter can directly determine the dew point temperature of the air.

[0056] After accurately obtaining the dew point temperature value in the cabinet 11, the controller can control the opening of the control valve through the control algorithm according to the dew point temperature value and the ambient temperature value to adjust the amount of refrigerant entering the cooling pipeline. While cooling the inverter, the ambient temperature value is controlled to be greater than the dew point temperature value to avoid condensation.

[0057] For example, when the controller detects that the ambient temperature is close to or below the dew point temperature, the control algorithm will adjust the opening of the control valve or close the control valve accordingly to limit the amount of refrigerant entering the cooling pipeline to ensure that the ambient temperature always remains within a safe range and avoid condensation.

[0058] In this embodiment, by setting a temperature monitoring element and a humidity monitoring element 17 inside the inverter cabinet 11, the cooling system of the inverter can accurately obtain the specific conditions of the current internal environmental conditions of the cabinet 11, especially the dew point temperature value of the internal environment of the cabinet 11. Combined with the ambient temperature value in the cabinet 11 at this time, the controller dynamically adjusts the opening and closing and opening of the control valve through the control algorithm, thereby accurately controlling the amount of refrigerant entering the cooling pipeline.

[0059] This precise and intelligent adjustment not only ensures that the ambient temperature value can always be kept within a safe range to effectively avoid the occurrence of condensation inside the cabinet 11 and damage to the internal components of the cabinet, but also, this solution of precisely controlling the amount of refrigerant also helps to save refrigerant.

[0060] In one embodiment, two heat exchange components are provided in the cabinet 11 , namely a first heat exchange device 131 and a second heat exchange device 132 .

[0061] Specifically, if Figure 2 As shown, the first heat exchange device 131 is disposed in the interior space of the cabinet 11. The interior space of the cabinet 11 refers to the unoccupied free space in the inverter cabinet 11 except for the areas occupied by various devices, power modules 12 or other connecting components.

[0062] Providing the first heat exchange device 131 in the interior space of the cabinet 11 can utilize the interior space of the cabinet 11 to achieve effective heat exchange, ensuring that the components inside the cabinet 11 can maintain an appropriate temperature during operation to prevent condensation inside the cabinet 11.

[0063] Furthermore, a fan is provided on the first heat exchange device 131. The function of the fan is to promote heat exchange between the air flowing through the first heat exchange device 131 and the refrigerant in the first heat exchange device 131, thereby improving the heat exchange efficiency and effectively cooling the ambient temperature in the cabinet.

[0064] The second heat exchanger 132 is positioned near the power module 12 of the inverter. The power module 12 is the primary heat-generating component of the inverter and includes power components such as the rectifier module, inverter module, and reactor. Placing the second heat exchanger 132 near the power module 12 more effectively absorbs heat emitted by the power module 12, thereby further improving heat exchange efficiency.

[0065] Furthermore, if Figure 1 and 2 As shown, the cooling pipeline includes a first pipeline 141 and a second pipeline 142 arranged in parallel, and the heat exchange assembly includes a first heat exchange device 131 and a second heat exchange device 132. The first heat exchange device 131 is connected to the first pipeline 141, and the second heat exchange device 132 is connected to the second pipeline 142.

[0066] The first heat exchange device 131 and the second heat exchange device 132 are connected and arranged in different pipelines, so that the system can control the working status of each heat exchange device separately as needed to achieve more accurate temperature control and energy consumption control of the refrigerant amount.

[0067] Furthermore, the parallel arrangement of the first and second pipelines 141 and 142 provides redundancy and backup capabilities during the heat exchange process. If one pipeline fails or requires maintenance, the system can continue to operate effectively through the other pipeline, thereby improving system reliability and stability.

[0068] In one embodiment, the temperature monitoring element includes a first temperature monitoring element 161 and a second temperature monitoring element 162. The first temperature monitoring element 161 is disposed within the cabinet 11 and is used to monitor the temperature of the interior space of the cabinet 11. The second temperature monitoring element 162 is disposed near the second heat exchange device 132 and is used to monitor the temperature of the space surrounding the second heat exchange device 132, thereby more accurately understanding the operating status and heat exchange effect of the power module 12.

[0069] By setting up these temperature monitoring elements, the system can obtain temperature information of different areas in real time, which helps the system achieve more precise temperature regulation and energy utilization, and improve the performance and efficiency of the system.

[0070] In one embodiment, Figure 1-2As shown, the control valve includes a first control valve 151 and a second control valve 152. The first control valve 151 is connected and arranged in the first pipeline 141, and the second control valve 152 is connected and arranged in the second pipeline 142. The controller controls the opening of the first control valve 151 and the second control valve 152 according to the ambient temperature and ambient humidity to adjust the amount of refrigerant entering the first pipeline 141 and the second pipeline 142 respectively.

[0071] In this embodiment, by providing two cooling pipelines and installing two sets of heat exchangers in each pipeline, the heat exchangers are placed in different areas within cabinet 11. This allows the system to obtain temperature information within cabinet 11 from multiple angles, thereby improving the accuracy of its ambient temperature monitoring. This design also allows the system to selectively adjust the amount of refrigerant flowing into different pipelines based on the ambient temperature in different areas, thereby ensuring that the ambient temperature remains within a safe range and further protecting the device from the effects of humid environments.

[0072] In one embodiment, the first control valve 151 and the second control valve 152 are both electronic expansion valves.

[0073] Furthermore, if Figure 2-5 As shown, the first heat exchange device 131 has two interfaces, namely a first interface 1411 and a second interface 1412 arranged in communication with the first pipeline 141. The refrigerant enters the first heat exchange device 131 through the first interface 1411 and flows out of the first heat exchange device 131 through the second interface 1412 after heat exchange.

[0074] Similarly, the second heat exchange device 132 has two interfaces, namely a third interface 1421 and a fourth interface 1422 disposed in the second pipeline 142. The refrigerant enters the second heat exchange device 132 through the third interface 1421 and flows out of the second heat exchange device 132 through the fourth interface 1422 after heat exchange.

[0075] In one embodiment, the first heat exchange device 131 can be a heat exchanger. A drain port 20 is provided at the bottom of the heat exchanger to discharge condensed water condensed on the surface of the heat exchanger out of the cabinet 11.

[0076] The second heat exchange device is specifically constructed as a curved, disc-shaped heat exchange pipe, which allows the refrigerant to more effectively exchange heat with the pipe wall during flow. Since the power module 12 is generally located near the back panel of the cabinet 11, the second heat exchange device 132 is installed on the back panel inside the cabinet 11.

[0077] By adopting heat exchange devices of different structural forms, the inverter's cooling system can more flexibly adapt to different heat exchange requirements and working environments, thereby achieving more precise temperature control and energy utilization.

[0078] An embodiment of the present invention further provides a refrigeration device, including the inverter as described above, wherein the inlet end of the cooling pipeline is connected to the condenser 18 of the refrigeration device, and the outlet end of the cooling pipeline is connected to the evaporator 19 of the refrigeration device.

[0079] Specifically, the refrigerant flowing out of the condenser 18 flows through the first pipeline 141 and the second pipeline 142 through the inlet end of the cooling pipeline, and enters the low-pressure area such as the evaporator 19 through the outlet end of the cooling pipeline, completing the cooling of the internal environment of the inverter cabinet 11.

[0080] The embodiment of the present invention also provides a control method for a refrigeration device, such as Figure 6 As shown, the control method includes the following steps S100 to S300.

[0081] First, before executing step S100, the controller of the refrigeration equipment needs to perform temperature measurement before startup, calculate the current dew point temperature value in the inverter cabinet 11 based on the feedback value of the humidity monitoring element 17, and decide whether the host system can be started based on this value.

[0082] Specifically, when the monitored dew point temperature value is greater than or equal to the first preset temperature value, it means that the air humidity is high and condensation is likely to occur. Then, the host system of the refrigeration equipment will not be started, that is, no refrigerant will be introduced into the cooling pipeline to avoid condensation.

[0083] According to production experience, in this embodiment, the first preset temperature value is selected as 40 degrees Celsius.

[0084] By monitoring and controlling humidity conditions, cooling equipment can avoid condensation in humid environments, ensuring stable and reliable operation. This intelligent control strategy helps improve equipment efficiency and reliability while protecting it from damage caused by humid environments.

[0085] Further, when the monitored dew point temperature value is less than the first preset temperature value, the following steps S100 to S300 are performed.

[0086] Step S100: Acquire the ambient temperature in the cabinet 11 .

[0087] Acquiring the ambient temperature inside the cabinet 11 means that the controller obtains the ambient temperature data inside the cabinet 11 in real time through devices such as temperature monitoring elements or sensors.

[0088] In one embodiment, obtaining the ambient temperature in the cabinet 11 includes respectively obtaining the ambient temperatures of the interior space of the cabinet 11 and the ambient temperatures around the power module 12 collected by the first temperature sensor and the second temperature sensor.

[0089] Step S200: obtaining the dew point temperature in the cabinet 11 .

[0090] In one embodiment, the controller uses a humidity sensor to obtain humidity data within the cabinet 11. A humidity sensor is a device used to measure ambient humidity and outputs a current humidity value. The controller uses a specific control algorithm to calculate the current dew point temperature based on the humidity value obtained by the humidity sensor.

[0091] In one embodiment, the controller directly obtains the dew point temperature value inside the cabinet 11 through a dew point meter. Directly obtaining the dew point temperature value inside the cabinet 11 through a dew point meter can provide the controller with more accurate and precise data.

[0092] Step S300: controlling the opening of the control valve according to the dew point temperature and the ambient temperature to adjust the ambient temperature to a target temperature value.

[0093] Based on the ambient temperature and dew point temperature inside the cabinet 11 obtained in the previous step, the controller adjusts the opening of the control valve to adjust the amount of refrigerant entering the cooling pipeline, and then adjusts the ambient temperature to the target temperature value. The target temperature value should be higher than the dew point temperature value, so as to avoid the occurrence of condensation.

[0094] Specifically, when the control valve opening is small, the flow of refrigerant in the cooling pipeline will be reduced, thereby reducing the cooling effect and increasing the ambient temperature; when the control valve opening is large, the flow of refrigerant in the cooling pipeline will increase, improving the cooling effect and reducing the ambient temperature.

[0095] The controller continuously monitors the ambient temperature and dew point temperature, provides feedback and makes adjustments based on real-time data, and adjusts the ambient temperature by controlling the opening of the control valve to the target temperature. This ensures that the temperature inside the cabinet 11 does not cause condensation or other problems due to an excessively high dew point temperature.

[0096] In one embodiment, the controller uses the first temperature monitoring element 161 and the second temperature monitoring element 162 to respectively obtain the ambient temperature of the interior space of the cabinet 11 and the ambient temperature around the power module 12. The controller then controls the openings of the first control valve 151 and the second control valve 152 to specifically adjust the ambient temperature of various areas within the cabinet 11, improve cooling efficiency, and ensure that key components such as the power module 12 remain within an appropriate operating temperature range.

[0097] For example, if the power module 12 generates a high temperature, the controller increases the opening of the second control valve 152 to allow more refrigerant to flow through the power module 12, thereby effectively lowering its temperature. Of course, the controller can also adjust the opening of the first control valve 151 to ensure that the ambient temperature inside the cabinet 11 remains within an appropriate range.

[0098] Furthermore, the target temperature value is the sum of the dew point temperature value and the first preset value, so as to ensure that the target temperature value is always greater than the dew point temperature value.

[0099] Specifically, in this embodiment, based on production experience, the first preset value is preferably 5, which can also be understood as the difference between the target temperature value and the dew point temperature value is 5 degrees Celsius.

[0100] Through such settings, the controller can effectively control the real-time ambient temperature while ensuring that the target temperature value is greater than the dew point temperature value, thereby achieving precise temperature adjustment, preventing condensation, and saving refrigerant usage, saving costs and energy consumption.

[0101] Furthermore, if Figure 7 As shown, an implementation of step S300 may further include:

[0102] Step S310: According to the feedback from the temperature monitoring element, when the temperature inside the cabinet 11, including the temperature of the internal space of the cabinet 11 and the temperature of the surrounding environment of the power module 12, is lower than a first preset temperature value, the host system of the refrigeration equipment is in the startup state.

[0103] Step S321: When the sum of the dew point temperature and the second preset value is less than or equal to the first preset temperature value, the target temperature value is controlled to be the sum of the dew point temperature and the second preset value. This ensures that the target temperature value is always higher than the dew point temperature value to avoid condensation.

[0104] The second preset value may be a value greater than or equal to 1, such as any value from 1 to 8, to ensure the adjustment range and control effect of the system.

[0105] In this embodiment, the second preset value is preferably 5. For example, when the monitored dew point temperature is 34 degrees Celsius, the control target temperature is 39 degrees Celsius.

[0106] Through the above control, the target temperature value can be achieved more accurately, and the amount of refrigerant used can be controlled according to actual needs, avoiding problems such as corrosion of parts caused by condensation, and improving energy saving effects.

[0107] Step S322: When the sum of the dew point temperature and the second preset value is greater than the first preset temperature value, the target temperature value is controlled to be the first preset temperature value.

[0108] It should be noted that this situation corresponds to the situation where the dew point temperature value is close to the first preset temperature value. For example, when the first preset temperature value is 40 degrees Celsius and the dew point temperature value is 38 degrees Celsius, in order to save refrigerant consumption and ensure that the target temperature value is higher than the dew point temperature value, the target temperature value is set to the first preset temperature value.

[0109] In another embodiment, when the temperature value monitored in the cabinet 11 is greater than or equal to a first preset temperature value (for example, 40 degrees Celsius) and less than a fourth preset temperature value (for example, 45 degrees Celsius), the host system is started and its control mode is executed according to S321 or S322. However, the host system will issue a high temperature warning at this time.

[0110] Furthermore, an implementation of step S300 may further include:

[0111] Step S323: When the dew point temperature is lower than the second preset temperature value, the target temperature value is controlled to be a third preset temperature value.

[0112] This situation corresponds to the case of a low dew point temperature. For example, when the monitored dew point temperature is lower than the second preset temperature value (such as 25 degrees Celsius), the controller will set the target temperature value to the third preset temperature value (such as 35 degrees Celsius). To save refrigerant consumption, the target temperature value is controlled at a temperature suitable for the inverter or a temperature similar to the ambient temperature, such as 35 degrees Celsius.

[0113] The control method provided in this embodiment can adjust the target temperature value based on the actual dew point temperature, ensuring that the target temperature value is always greater than the dew point temperature value, thereby effectively preventing the occurrence of condensation. Furthermore, the controller can also adjust the preset target temperature based on the actual ambient temperature, thereby saving refrigerant consumption and improving the energy efficiency of the system.

[0114] In summary, the control method provided in this embodiment is accurate, efficient, and self-adaptive, and can achieve different adjustment effects under different ambient temperatures, thereby providing an effective solution for controlling the cooling system of refrigeration equipment.

[0115] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A frequency converter, characterized in that: include: a cabinet body, in which a heat exchange component is arranged; A cooling pipeline, wherein the heat exchange component is connected and arranged in the cooling pipeline, and the cooling pipeline is used to pass a refrigerant; a control valve connected to the inlet end of the cooling pipeline; a temperature monitoring element, which is disposed in the cabinet and is used to monitor the ambient temperature in the cabinet; A humidity monitoring element is provided in the cabinet and is used to monitor the ambient humidity in the cabinet; A controller is electrically connected to the control valve, and the controller controls the opening of the control valve according to the ambient temperature and the ambient humidity to adjust the amount of refrigerant entering the cooling pipeline.

2. The frequency converter according to claim 1, characterized in that: The cooling pipeline includes a first pipeline and a second pipeline arranged in parallel, and the heat exchange assembly includes a first heat exchange device and a second heat exchange device, the first heat exchange device is communicatively arranged in the first pipeline, and the second heat exchange device is communicatively arranged in the second pipeline; The first heat exchange device is disposed in the cabinet and is used to exchange heat for the internal space of the cabinet. The second heat exchange device is disposed near the power module of the inverter and is used to exchange heat for the power module.

3. The frequency converter according to claim 2, characterized in that: The control valve includes a first control valve and a second control valve, the first control valve is connected and arranged in the first pipeline, and the second control valve is connected and arranged in the second pipeline. The controller controls the opening of the first control valve and the second control valve according to the ambient temperature and the ambient humidity to adjust the amount of refrigerant entering the first pipeline and the second pipeline respectively.

4. The frequency converter according to claim 3, characterized in that: The temperature monitoring element includes a first temperature monitoring element and a second temperature monitoring element. The first temperature monitoring element is arranged in the cabinet and is used to monitor the temperature of the space inside the cabinet. The second temperature monitoring element is arranged near the second heat exchange device and is used to monitor the temperature of the space around the second heat exchange device.

5. The frequency converter according to any one of claims 1 to 4, characterized in that: The humidity monitoring element is a humidity sensor or a dew point meter.

6. A refrigeration device, characterized in that: include: According to any one of claims 1 to 5, the inlet end of the cooling pipeline is connected to the condenser of the refrigeration equipment, and the outlet end of the cooling pipeline is connected to the evaporator of the refrigeration equipment.

7. A method for controlling a refrigeration device, characterized in that: The refrigeration equipment comprises: The inverter has a heat exchange component provided in its cabinet; A cooling pipeline, wherein the heat exchange component is connected and arranged in the cooling pipeline, and the cooling pipeline is used to pass a refrigerant; a control valve connected to the inlet end of the cooling pipeline; a temperature monitoring element, which is disposed in the cabinet and is used to monitor the ambient temperature in the cabinet; A humidity monitoring element is provided in the cabinet and is used to monitor the ambient humidity in the cabinet; a controller electrically connected to the control valve, the controller controlling the opening of the control valve according to the ambient temperature and the ambient humidity to adjust the amount of refrigerant entering the cooling pipeline; The control method includes: Obtaining the ambient temperature inside the cabinet; Obtaining the dew point temperature inside the cabinet; The opening of the control valve is controlled according to the dew point temperature and the ambient temperature to adjust the ambient temperature to a target temperature value.

8. The control method according to claim 7, characterized in that: The target temperature value is the sum of the dew point temperature and a first preset value.

9. The control method according to claim 7, characterized in that: The “controlling the opening of the control valve according to the dew point temperature and the ambient temperature to adjust the ambient temperature to a target temperature value” includes: When the ambient temperature is lower than the first preset temperature value, when the sum of the dew point temperature and the second preset value is less than or equal to the first preset temperature value, the target temperature value is controlled to be the sum of the dew point temperature and the second preset value; when the sum of the dew point temperature and the second preset value is greater than the first preset temperature value, the target temperature value is controlled to be the first preset temperature value.

10. The control method according to claim 8, characterized in that: The “controlling the opening of the control valve according to the dew point temperature and the ambient temperature to adjust the ambient temperature to a target temperature value” also includes: When the dew point temperature is lower than the second preset temperature value, the target temperature value is controlled to be the third preset temperature value.

Images