Starting control method of refrigerating system and refrigerating system

Abstract

The invention discloses a refrigeration system starting control method and a refrigeration system.The starting control method comprises the steps that the current environment temperature is obtained, then the preset temperature interval where the current environment temperature is located is determined, and the starting maintaining frequency of a compressor is determined according to the preset temperature interval where the current environment temperature is located; and then the compressor is controlled to be started based on the determined compressor starting holding frequency, the number of the preset temperature intervals is multiple, each preset temperature interval corresponds to one starting holding frequency of the compressor, and the higher the temperature of the preset temperature intervals is, the lower the starting holding frequency of the compressor is. According to the application, the starting holding frequency of the compressor can be automatically adjusted according to the preset temperature interval of the current environment temperature, so that the starting stability of the compressor under different temperature conditions can be improved.

Description

Technical Field

[0001] The present application relates to the field of refrigeration technology, and in particular to a refrigeration system and a startup control method for the refrigeration system. Background Art

[0002] In modern industrial and commercial applications, compressors are key components in many refrigeration and air-conditioning systems, especially in high-temperature environments such as data centers, chemical plants, steel mills, etc. The performance of the compressor is directly related to the stability and energy efficiency of the refrigeration system.

[0003] However, in the process of implementing the invention, the inventors found that there are at least the following problems in the prior art: The startup strategy of traditional compressors is often based on fixed parameter settings, and does not fully consider the impact of ambient temperature on the startup and operation of the compressor. This may cause difficulties in starting the compressor under high temperature conditions, unstable operation after startup, and even overheating protection shutdown, which will seriously affect the normal operation and service life of the system. Summary of the invention

[0004] In order to effectively overcome the problems existing in the above-mentioned prior art, the main purpose of the present application is to provide a refrigeration system and a startup control method of the refrigeration system that can improve the startup stability of the compressor in a high temperature environment.

[0005] In order to achieve the above objectives, this application specifically adopts the following technical solutions: The present application provides a startup control method for a refrigeration system, wherein the refrigeration system includes a compressor, and the startup control method includes: Get the current ambient temperature; Determining a preset temperature range within which the current ambient temperature lies; Determining the start-up and maintenance frequency of the compressor according to the preset temperature range in which the current ambient temperature is located; controlling the compressor to start based on the determined compressor start-up maintenance frequency; There are a plurality of preset temperature intervals, each of which corresponds to a start-up and maintenance frequency of the compressor, and the higher the temperature of the preset temperature interval, the lower the start-up and maintenance frequency of the compressor.

[0006] In some embodiments, the preset temperature interval includes a first preset temperature interval, the temperature T1 of the first preset temperature interval is T1<35° C., and the start-up and maintenance frequency of the compressor corresponding to the first preset temperature interval is 35 rpm~45 rpm.

[0007] In some embodiments, the preset temperature interval includes a second preset temperature interval, the temperature T2 of the second preset temperature interval is 35°C≤T2<40°C, and the start-up and maintenance frequency of the compressor corresponding to the second preset temperature interval is 30 rpm~40 rpm.

[0008] In some embodiments, the preset temperature interval includes a third preset temperature interval, the temperature T3 of the third preset temperature interval is 40°C≤T3<45°C, and the start-up and maintenance frequency of the compressor corresponding to the third preset temperature interval is 25 rpm~35 rpm.

[0009] In some embodiments, the preset temperature interval includes a fourth preset temperature interval, the temperature T4 of the fourth preset temperature interval is 45°C≤T4, and the start-up and maintenance frequency of the compressor corresponding to the fourth preset temperature interval is 20 rpm~30 rpm.

[0010] In some embodiments, within the preset time of starting the compressor, when the ambient temperature changes from one of the preset temperature intervals to another preset temperature interval and reaches a preset jump value, the compressor is controlled to jump from the current start-up holding frequency to the corresponding start-up holding frequency.

[0011] In some embodiments, obtaining the current ambient temperature is specifically: The current ambient temperature is detected by the temperature sensor.

[0012] In some embodiments, obtaining the current ambient temperature includes: Acquiring ambient temperature data through the temperature sensor; Determine whether the ambient temperature data is a valid value; When the ambient temperature data is confirmed to be a valid value, the ambient temperature detected by the temperature sensor is used as the current ambient temperature; When it is confirmed that the ambient temperature data is an invalid value, the suction temperature of the compressor is obtained, and then the current ambient temperature is obtained based on the suction temperature and the suction temperature compensation value.

[0013] Correspondingly, the present application also provides a refrigeration system, which includes a condenser, an evaporator, a compressor, a throttling element and a controller, wherein the output end of the condenser is connected to the input end of the throttling element, the output end of the throttling element is connected to the input end of the evaporator, the output end of the evaporator is connected to the input end of the compressor, and the output end of the compressor is connected to the input end of the condenser; the controller is connected to the compressor, and the controller is used to obtain the ambient temperature, and determine the start-up and maintenance frequency of the compressor according to the preset temperature range of the ambient temperature, and control the start-up of the compressor based on the determined compressor start-up and maintenance frequency; There are a plurality of preset temperature intervals, each of which corresponds to a start-up and maintenance frequency of the compressor, and the higher the temperature of the preset temperature interval, the lower the start-up and maintenance frequency of the compressor.

[0014] In some embodiments, the refrigeration system further includes a temperature sensor, which is connected to the controller and is used to detect the ambient temperature and transmit the temperature to the controller.

[0015] Compared with the prior art, the technical solution provided by this application has at least the following beneficial effects: The present application obtains the current ambient temperature, determines the preset temperature interval in which the current ambient temperature is located, and determines the start-up and maintenance frequency of the compressor according to the preset temperature interval in which the current ambient temperature is located, and then controls the start-up of the compressor based on the determined start-up and maintenance frequency of the compressor, wherein there are multiple preset temperature intervals, each preset temperature interval corresponds to a start-up and maintenance frequency of the compressor, and the higher the temperature of the preset temperature interval, the lower the start-up and maintenance frequency of the compressor. It can be seen that the present application can automatically adjust the start-up and maintenance frequency of the compressor according to the preset temperature interval in which the current ambient temperature is located, thereby improving the smoothness of the compressor startup under different temperature conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural block diagram of the refrigeration system provided in an embodiment of the present application.

[0017] Figure 2 A flowchart of a startup control method for a refrigeration system provided in an embodiment of the present application.

[0018] Figure ID: 1. Condenser; 2. Evaporator; 3. Compressor; 4. Throttling element. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0020] In the description of this application, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; unless otherwise specified or explained, the term "plurality" refers to two or more; the terms "connected" and "fixed" should be understood in a broad sense, for example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0021] In the description of this specification, it should be understood that the directional words such as "upper" and "lower" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should also be understood that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0022] In the related art, the influence of high temperature environment on the compressor in the refrigeration system mainly includes: a. Difficulty in starting. In a high temperature environment, the viscosity of the lubricating oil inside the compressor decreases, the lubrication effect becomes worse, resulting in increased friction during startup, increased starting current, and easy to cause motor overload protection; b. Unstable operation. In a high temperature environment, the operating temperature of the compressor increases, which may cause overheating of internal parts, affecting compression efficiency and reliability; c. Reduced energy efficiency. In order to cope with the high temperature environment, the compressor may need a higher operating frequency, which will increase energy consumption and reduce the overall energy efficiency of the refrigeration system. At present, there are some solutions for compressor startup under high temperature conditions on the market, but they usually have the following shortcomings: a. Fixed startup frequency. Most existing technologies adopt a fixed startup frequency without considering the change of ambient temperature. This approach may cause startup failure or unstable operation after startup under high temperature conditions; b. Lack of backup solutions. Existing solutions usually do not consider the failure of temperature sensors. Once the temperature sensor fails, the refrigeration system cannot provide effective backup startup logic, affecting the reliability and stability of the refrigeration system; c. High energy consumption. The strategy of fixed startup frequency will cause the compressor to start and stop frequently in a high temperature environment, increase energy consumption, and reduce the energy efficiency ratio of the refrigeration system.

[0023] Based on this, existing solutions usually include adding heat dissipation devices, optimizing cooling systems, etc. However, these methods have disadvantages such as high cost and complex maintenance in practical applications. Therefore, the inventor of this application proposes a startup logic of a refrigeration system based on ambient temperature, which determines the maintenance frequency when the compressor is started through a pre-set temperature range to ensure that the compressor can start smoothly under different temperature conditions.

[0024] Reference Figure 1 As shown, the embodiment of the present application discloses a refrigeration system, which includes a condenser 1, an evaporator 2, a compressor 3, a throttling element 4 and a controller, wherein the output end of the condenser 1 is connected to the input end of the throttling element 4, the output end of the throttling element 4 is connected to the input end of the evaporator 2, the output end of the evaporator 2 is connected to the input end of the compressor 3, and the output end of the compressor 3 is connected to the input end of the condenser 1. The controller is connected to the compressor 3 and the throttling element 4 respectively, and is used to control the operation of the compressor 3 and the throttling element 4.

[0025] During refrigeration, the refrigerant in the evaporator 2 exchanges heat with the surrounding air to cool down the space to be cooled. At this time, the refrigerant absorbs heat and its temperature rises, and it is transformed from a liquid refrigerant or a vapor-liquid two-phase refrigerant into a gaseous refrigerant. Then the gaseous refrigerant flows out of the evaporator 2 to the compressor 3, and the gaseous refrigerant is compressed into a high-temperature and high-pressure gaseous refrigerant by the compressor 3. The high-temperature and high-pressure gaseous refrigerant flows to the condenser 1. In the condenser 1, the high-temperature and high-pressure gaseous refrigerant releases heat to the surrounding air and is transformed into a low-temperature liquid refrigerant. The low-temperature liquid refrigerant is throttled and reduced in pressure by the throttling element 4 and then flows to the evaporator 2 to continue cooling down the space to be cooled down.

[0026] In order to enable the refrigeration system to start normally and run smoothly in a high temperature environment, the refrigeration system also includes a temperature sensor, which is connected to the controller. The temperature sensor is used to detect the ambient temperature and transmit it to the controller, so that the controller can control the start-up and maintenance frequency of the compressor according to the specific conditions of the ambient temperature. In addition, when the temperature sensor fails, the ambient temperature can also be obtained based on the suction temperature of the compressor and the suction temperature compensation value.

[0027] Exemplarily, the refrigeration system can detect the ambient temperature before the compressor is started through a temperature sensor. If the detected ambient temperature data is invalid (for example, the temperature sensor fails or the data is abnormal), the refrigeration system will automatically switch to the backup startup logic, specifically detecting the suction temperatures of compressors 1# and 2# respectively, and then selecting the maximum value from the suction temperatures of 1# and 2#, and then adding the selected maximum value to the preset suction temperature compensation value as the ambient temperature, wherein the suction temperature compensation value can be set according to actual conditions (for example, 5°C). In this embodiment, in the event of a temperature sensor failure, the backup startup logic can also be used to determine the ambient temperature, thereby determining the corresponding startup and holding frequency of the compressor, ensuring that the compressor can be safely started even without valid ambient temperature data.

[0028] When starting the refrigeration system, the ambient temperature can be detected by the temperature sensor and the detection result can be transmitted to the controller. The controller determines the start-up and maintenance frequency of the compressor according to the preset temperature range of the ambient temperature, and controls the start-up of the compressor based on the determined compressor start-up and maintenance frequency. There are multiple preset temperature ranges, each of which corresponds to a start-up and maintenance frequency of the compressor, and the higher the temperature of the preset temperature range, the lower the start-up and maintenance frequency of the compressor.

[0029] Exemplarily, the preset temperature intervals include a first preset temperature interval, a second preset temperature interval, a third preset temperature interval and a fourth preset temperature interval. The temperature T1 of the first preset temperature interval is T1<35°C, and the corresponding compressor start-up and maintenance frequency is 35 rpm~45 rpm; the temperature T2 of the second preset temperature interval is 35°C≤T2<40°C, and the corresponding compressor start-up and maintenance frequency is 30 rpm~40 rpm; the temperature T3 of the third preset temperature interval is 40°C≤T3<45°C, and the corresponding compressor start-up and maintenance frequency is 25 rpm~35 rpm; the temperature T4 of the fourth preset temperature interval is 45°C≤T4, and the corresponding compressor start-up and maintenance frequency is 20 rpm~30 rpm.

[0030] During the process of starting the compressor, if it is detected that the current ambient temperature is in the first preset temperature range, the controller controls the compressor to start with a start-up and maintenance frequency of 35 rpm to 45 rpm; when it is detected that the ambient temperature is in the second preset temperature range, the controller controls the compressor to start with a start-up and maintenance frequency of 30 rpm to 40 rpm; when it is detected that the ambient temperature is in the third preset temperature range, the controller controls the compressor to start with a start-up and maintenance frequency of 25 rpm to 35 rpm; when it is detected that the ambient temperature is in the fourth preset temperature range, the controller controls the compressor to start with a start-up and maintenance frequency of 20 rpm to 30 rpm.

[0031] Within the preset time of compressor startup, if the detected ambient temperature changes from one of the preset temperature intervals to another preset temperature interval and reaches the preset jump value, the controller controls the compressor to jump from the current startup and holding frequency to the corresponding startup and holding frequency.

[0032] In some embodiments, the preset jump value is the maximum threshold of the preset temperature interval plus the interval hysteresis value, or the minimum threshold of the preset temperature interval minus the interval hysteresis value. The interval hysteresis value can be set according to actual conditions. For example, the interval hysteresis value can be 2°C, and the preset jump value can be 33°C, 37°C, 38°C, 42°C, 43°C, or 47°C, as shown in Table 1.

[0033] For example, during the compressor startup phase, if the temperature sensor detects that the current ambient temperature is 30°C, the controller controls the compressor to start at a startup and maintenance frequency of 35 rpm to 45 rpm. Within the preset time of 3 minutes after the compressor is started, if the temperature sensor detects that the ambient temperature rises from 30°C to 37°C, it is determined that the ambient temperature changes from the first preset temperature interval to the second preset temperature interval and reaches the preset jump value of 37°C. At this time, the controller controls the compressor to run at a startup and maintenance frequency of 30 rpm to 40 rpm.

[0034]

[0035] Table 1 is a parameter comparison table of the temperature in the preset temperature range and the start-up and maintenance frequency of the compressor The present application improves the startup success rate and operating stability of the compressor under high temperature conditions by dynamically adjusting the startup and holding frequency of the compressor according to the ambient temperature, and can also optimize the energy efficiency performance of the refrigeration system. Specifically: a. It can improve startup reliability by dynamically adjusting the startup and holding frequency according to the ambient temperature, thereby reducing the risk of startup failure and ensuring that the compressor can start smoothly under various temperature environments; b. It can enhance the adaptability of the system, provide a backup plan when the temperature sensor fails, increase the fault tolerance and adaptability of the refrigeration system, and ensure stable operation under various conditions; c. It can optimize energy efficiency performance. Reasonable startup logic helps to reduce unnecessary energy consumption, improve the energy efficiency ratio of the entire refrigeration system, and reduce operating costs.

[0036] Reference Figure 2 As shown, the embodiment of the present application further discloses a startup control method for a refrigeration system, which can be applied to the refrigeration system described in the above embodiment. The startup control method includes the following steps: S11. Obtain the current ambient temperature.

[0037] Specifically, the current ambient temperature may be detected by a temperature sensor, or the suction temperature of the compressor may be first acquired, and then the current ambient temperature may be acquired based on the suction temperature and the suction temperature compensation value.

[0038] In some embodiments, ambient temperature data can be obtained through a temperature sensor, and then it is determined whether the ambient temperature data is a valid value. When it is confirmed that the ambient temperature data is a valid value, the ambient temperature detected by the temperature sensor is used as the current ambient temperature. When it is confirmed that the ambient temperature data is an invalid value, the suction temperature of the compressor is obtained, and then the current ambient temperature is obtained based on the suction temperature and the suction temperature compensation value.

[0039] Exemplarily, the refrigeration system can detect the ambient temperature before the compressor is started through a temperature sensor. If the detected ambient temperature data is invalid (for example, the temperature sensor fails or the data is abnormal), the refrigeration system will automatically switch to the backup startup logic, specifically detecting the suction temperatures of compressors 1# and 2# respectively, and then selecting the maximum value from the suction temperatures of 1# and 2#, and then adding the selected maximum value to the preset suction temperature compensation value as the ambient temperature, wherein the suction temperature compensation value can be set according to actual conditions (for example, 5°C). In this embodiment, when the temperature sensor fails, etc., it can automatically switch to using the maximum value of the suction temperatures of compressors 1# and 2# plus the preset suction temperature compensation value as the ambient temperature input to determine the startup and maintenance frequency of the compressor, thereby ensuring that the compressor can be safely started even without valid ambient temperature data.

[0040] S12: Determine the preset temperature range in which the current ambient temperature is located.

[0041] Specifically, there are multiple preset temperature intervals, each of which corresponds to a start-up and maintenance frequency of the compressor, and the higher the temperature in the preset temperature interval, the lower the start-up and maintenance frequency of the compressor. After obtaining the current ambient temperature, the preset temperature interval in which the current ambient temperature is located is determined.

[0042] Exemplarily, the preset temperature intervals include a first preset temperature interval, a second preset temperature interval, a third preset temperature interval and a fourth preset temperature interval, the temperature T1 of the first preset temperature interval is T1<35°C, and the start-up and maintenance frequency of the compressor corresponding to the first preset temperature interval is 35 rpm~45 rpm; the temperature T2 of the second preset temperature interval is 35°C≤T2<40°C, and the start-up and maintenance frequency of the compressor corresponding to the second preset temperature interval is 30 rpm~40 rpm; the temperature T3 of the third preset temperature interval is 40°C≤T3<45°C, and the start-up and maintenance frequency of the compressor corresponding to the third preset temperature interval is 25 rpm~35 rpm; the temperature T4 of the fourth preset temperature interval is 45°C≤T4, and the start-up and maintenance frequency of the compressor corresponding to the fourth preset temperature interval is 20 rpm~30 rpm. If the current ambient temperature obtained is 32°C, it is determined that the current ambient temperature is within the first preset temperature range; if the current ambient temperature obtained is 38°C, it is determined that the current ambient temperature is within the second preset temperature range; if the current ambient temperature obtained is 43°C, it is determined that the current ambient temperature is within the third preset temperature range; if the current ambient temperature obtained is 46°C, it is determined that the current ambient temperature is within the fourth preset temperature range.

[0043] S13. Determine the start-up and maintenance frequency of the compressor according to the preset temperature range of the current ambient temperature.

[0044] Specifically, if it is detected that the current ambient temperature is in the first preset temperature range, the start-up and holding frequency of the compressor is determined to be 35 rpm to 45 rpm; if it is detected that the current ambient temperature is in the second preset temperature range, the start-up and holding frequency of the compressor is determined to be 30 rpm to 40 rpm; if it is detected that the current ambient temperature is in the third preset temperature range, the start-up and holding frequency of the compressor is determined to be 25 rpm to 35 rpm; if it is detected that the current ambient temperature is in the fourth preset temperature range, the start-up and holding frequency of the compressor is determined to be 20 rpm to 30 rpm.

[0045] S14. Controlling the compressor startup based on the determined compressor startup and maintenance frequency.

[0046] Specifically, before starting the compressor, if it is detected that the current ambient temperature is in the first preset temperature range, the controller controls the compressor to start with a start-up and maintenance frequency of 35 rpm to 45 rpm; when it is detected that the current ambient temperature is in the second preset temperature range, the controller controls the compressor to start with a start-up and maintenance frequency of 30 rpm to 40 rpm; when it is detected that the current ambient temperature is in the third preset temperature range, the controller controls the compressor to start with a start-up and maintenance frequency of 25 rpm to 35 rpm; when it is detected that the current ambient temperature is in the fourth preset temperature range, the controller controls the compressor to start with a start-up and maintenance frequency of 20 rpm to 30 rpm.

[0047] Within the preset time of compressor startup, if the detected ambient temperature changes from one of the preset temperature intervals to another preset temperature interval and reaches the preset jump value, the controller controls the compressor to jump from the current startup and holding frequency to the corresponding startup and holding frequency.

[0048] In some embodiments, the preset jump value is the maximum threshold of the preset temperature interval plus the interval hysteresis value, or the minimum threshold of the preset temperature interval minus the interval hysteresis value. The interval hysteresis value can be set according to actual conditions, for example, the interval hysteresis value can be 2°C.

[0049] Exemplarily, when the compressor is started, if the temperature sensor detects that the current ambient temperature is 37°C, the controller controls the compressor to start at a start-up and maintenance frequency of 30 rpm to 40 rpm. Within the preset time of 3 minutes after the compressor is started, if the temperature sensor detects that the ambient temperature rises from 37°C to 42°C, it is determined that the ambient temperature changes from the second preset temperature interval to the third preset temperature interval and reaches the preset jump value of 42°C. At this time, the controller controls the compressor to run at a start-up and maintenance frequency of 25 rpm to 35 rpm. If the temperature sensor detects that the ambient temperature drops from 37°C to 33°C, the controller controls the compressor to run at a start-up and maintenance frequency of 35 rpm to 45 rpm. If the temperature sensor detects that the ambient temperature rises from 37°C to 47°C, the controller controls the compressor to run at a start-up and maintenance frequency of 20 rpm to 30 rpm.

[0050] The present application can automatically adjust the start-up and maintenance frequency of the compressor according to the preset temperature range of the current ambient temperature, ensuring that the compressor can start and run smoothly under different temperature conditions.

[0051] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A startup control method for a refrigeration system, the refrigeration system comprising a compressor, characterized in that: The startup control method comprises: Get the current ambient temperature; Determining a preset temperature range within which the current ambient temperature lies; Determining the start-up and maintenance frequency of the compressor according to the preset temperature range in which the current ambient temperature is located; controlling the compressor to start based on the determined compressor start-up maintenance frequency; There are a plurality of preset temperature intervals, each of which corresponds to a start-up and maintenance frequency of the compressor, and the higher the temperature of the preset temperature interval, the lower the start-up and maintenance frequency of the compressor.

2. The startup control method according to claim 1, characterized in that: The preset temperature interval includes a first preset temperature interval, a temperature T1 of the first preset temperature interval is T1<35° C., and a start-up and maintenance frequency of the compressor corresponding to the first preset temperature interval is 35 rpm to 45 rpm.

3. The startup control method according to claim 1, characterized in that: The preset temperature interval includes a second preset temperature interval, the temperature T2 of the second preset temperature interval is 35° C.≤T2<40° C., and the start-up and maintenance frequency of the compressor corresponding to the second preset temperature interval is 30 rpm~40 rpm.

4. The startup control method according to claim 1, characterized in that: The preset temperature interval includes a third preset temperature interval, a temperature T3 of the third preset temperature interval is 40° C.≤T3<45° C., and a start-up and maintenance frequency of the compressor corresponding to the third preset temperature interval is 25 rpm to 35 rpm.

5. The startup control method according to claim 1, characterized in that: The preset temperature interval includes a fourth preset temperature interval, a temperature T4 of the fourth preset temperature interval is 45° C.≤T4, and a start-up and maintenance frequency of the compressor corresponding to the fourth preset temperature interval is 20 rpm to 30 rpm.

6. The startup control method according to claim 1, characterized in that: Within the preset time of starting the compressor, when the ambient temperature changes from one of the preset temperature intervals to another preset temperature interval and reaches a preset jump value, the compressor is controlled to jump from the current start-up and holding frequency to the corresponding start-up and holding frequency.

7. The startup control method according to any one of claims 1 to 6, characterized in that: The obtaining of the current ambient temperature is specifically as follows: The current ambient temperature is detected by the temperature sensor.

8. The startup control method according to any one of claims 1 to 6, characterized in that: The obtaining of the current ambient temperature comprises: Acquiring ambient temperature data through the temperature sensor; Determine whether the ambient temperature data is a valid value; When the ambient temperature data is confirmed to be a valid value, the ambient temperature detected by the temperature sensor is used as the current ambient temperature; When it is confirmed that the ambient temperature data is an invalid value, the suction temperature of the compressor is obtained, and then the current ambient temperature is obtained based on the suction temperature and the suction temperature compensation value.

9. A refrigeration system, characterized in that: The invention comprises a condenser, an evaporator, a compressor, a throttling element and a controller, wherein the output end of the condenser is connected to the input end of the throttling element, the output end of the throttling element is connected to the input end of the evaporator, the output end of the evaporator is connected to the input end of the compressor, and the output end of the compressor is connected to the input end of the condenser; the controller is connected to the compressor, and the controller is used to obtain the ambient temperature, determine the start-up and maintenance frequency of the compressor according to the preset temperature range of the ambient temperature, and control the start-up of the compressor based on the determined start-up and maintenance frequency of the compressor; There are a plurality of preset temperature intervals, each of which corresponds to a start-up and maintenance frequency of the compressor, and the higher the temperature of the preset temperature interval, the lower the start-up and maintenance frequency of the compressor.

10. The refrigeration system according to claim 9, characterized in that: The refrigeration system further comprises a temperature sensor, which is connected to the controller and is used to detect the ambient temperature and transmit the temperature to the controller.

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