Air cooler and control method thereof

Abstract

The application provides an air cooler and a control method thereof. The air cooler comprises a first conveying pipeline, a plurality of first valves, a working tube bundle assembly, a standby tube bundle assembly, a plurality of second valves, a second conveying pipeline and a plurality of differential pressure detection devices. One end of the plurality of first valves is connected with one end of the first conveying pipeline, and the other end is connected with one end of the working tube bundle assembly and the standby tube bundle assembly in one-to-one correspondence. One end of the plurality of second valves is connected with one end of the second conveying pipeline, and the other end is connected with the other end of the working tube bundle assembly and the standby tube bundle assembly in one-to-one correspondence. The plurality of differential pressure detection devices are connected in parallel in one-to-one correspondence on the working tube bundle assembly and the standby tube bundle assembly. When the differential pressure of the working tube bundle assembly detected by the differential pressure detection device is greater than a set differential pressure, the block-shaped object formed by the impurity agglomeration blocks the working tube bundle assembly. At this time, the standby tube bundle assembly is turned on, and the working tube bundle assembly with the differential pressure greater than the set differential pressure is turned off, so that the air cooler is ensured to be normally used in a replacement mode.

Description

Technical Field

[0001] This article relates to the field of petroleum equipment technology, and more specifically, to an air cooler and a control method for an air cooler. Background Technology

[0002] Air coolers are used in the natural gas cooling process, but natural gas extracted from the ground contains many impurities. These impurities easily clump together to form lumps that block the air cooler's tube bundles, severely shortening the effective operating time of the air cooler. Moreover, the blocked tube bundles are difficult to clear. Therefore, providing an air cooler that allows for easy clearing and replacement of the tube bundles after blockage, thereby extending the effective operating time of the air cooler, is a technical problem that those skilled in the art continue to solve. Summary of the Invention

[0003] This invention provides an air cooler that is easy to unclog and replace tube bundles, thereby extending the effective operating time of the air cooler.

[0004] This invention provides a control method for an air cooler.

[0005] The air cooler provided in this embodiment of the invention includes a first delivery pipeline, a plurality of first valves, a working tube bundle assembly, a standby tube bundle assembly, a plurality of second valves, a second delivery pipeline, and a plurality of differential pressure detection devices. One end of each of the plurality of first valves is connected to one end of the first delivery pipeline, and the other end is connected to one end of each of the working tube bundle assembly and the standby tube bundle assembly. One end of each of the plurality of second valves is connected to one end of the second delivery pipeline, and the other end is connected to one end of each of the working tube bundle assembly and the standby tube bundle assembly. The plurality of differential pressure detection devices are connected in parallel to each of the working tube bundle assembly and the standby tube bundle assembly. When the differential pressure of the working tube bundle assembly is greater than a set differential pressure, the standby tube bundle assembly is turned on, and the working tube bundle assembly with the differential pressure greater than the set differential pressure is turned off.

[0006] Optionally, the working tube bundle assembly and the spare tube bundle assembly are detachably installed between the first valve and the second valve.

[0007] Optionally, the working tube bundle assembly includes: a working tube bundle; a first connecting tube box installed at one end of the working tube bundle and detachably connected to the other end of the first valve; and a second connecting tube box installed at the other end of the working tube bundle and detachably connected to the other end of the second valve.

[0008] Optionally, the spare tube bundle assembly includes: a spare tube bundle; a third connecting tube box installed at one end of the spare tube bundle and detachably connected to the other end of the first valve; and a fourth connecting tube box installed at the other end of the spare tube bundle and detachably connected to the other end of the second valve.

[0009] Optionally, the air cooler further includes a slide rail on which the working tube bundle assembly and the spare tube bundle assembly are mounted.

[0010] Optionally, the air cooler further includes: a cooling fan disposed toward the working tube bundle assembly and the spare tube bundle assembly; and a mounting bracket on which both the cooling fan and the slide rail are mounted.

[0011] Optionally, the working tube bundle assembly includes 2 to 4 sets, the spare tube bundle assembly includes 1 to 2 sets, both the working tube bundle assembly and the spare tube bundle assembly are equipped with fins, and the differential pressure detection device is a differential pressure transmitter.

[0012] The control method for an air cooler provided in this embodiment of the invention includes:

[0013] When the differential pressure detection device detects that the differential pressure of the working tube bundle assembly is greater than the set differential pressure, it turns on the backup tube bundle assembly and turns off the working tube bundle assembly whose differential pressure is greater than the set differential pressure, and replaces the working tube bundle assembly whose differential pressure is greater than the set differential pressure with the backup tube bundle assembly.

[0014] Optionally, when the differential pressure detection device detects that the differential pressure of the working tube bundle assembly is greater than a set differential pressure, the backup tube bundle assembly is turned on, the working tube bundle assembly with the differential pressure greater than the set differential pressure is turned off, and the working tube bundle assembly with the differential pressure greater than the set differential pressure is replaced by the backup tube bundle assembly, the control method further includes:

[0015] When the temperature of the conveyed gas is higher than the first set temperature, the previously shut-off working tube assembly is turned on, the previously turned-on standby tube assembly is turned off, and the conveyed gas is used to clear the blockage in the re-turned-on working tube assembly.

[0016] Optionally, before the differential pressure detection device detects that the differential pressure of the working tube bundle assembly is greater than a set differential pressure, the control method further includes: turning on the backup tube bundle assembly and turning off the working tube bundle assembly with the differential pressure greater than the set differential pressure, and replacing the working tube bundle assembly with the backup tube bundle assembly with the working tube bundle assembly with the differential pressure greater than the set differential pressure.

[0017] When the ambient temperature is higher than the second set temperature, the air cooler activates a first number of the working tube bundle assemblies;

[0018] When the ambient temperature is lower than the third set temperature, the air cooler activates a second number of the working tube bundle assemblies;

[0019] Wherein, the second set temperature is greater than the third set temperature, and the first quantity is greater than the second quantity.

[0020] The air cooler provided in this embodiment of the invention has a working tube bundle assembly that is turned on and a standby tube bundle assembly that is turned off. Gas is transported through the air cooler. When the differential pressure detection device detects that the differential pressure of the working tube bundle assembly is greater than the set differential pressure, the working tube bundle assembly is blocked by lumps formed by impurities. At this time, the standby tube bundle assembly is turned on and the working tube bundle assembly with the differential pressure greater than the set differential pressure is turned off. The working tube bundle assembly with the differential pressure greater than the set differential pressure is replaced by the standby tube bundle assembly, ensuring the normal use of the air cooler and extending the effective operating time of the air cooler.

[0021] When the temperature of the delivered gas exceeds the first set temperature, the previously shut-off working tube assembly is activated, while the previously activated standby tube assembly is shut off. The high-temperature delivered gas is used to clear the blockage in the reactivated working tube assembly. The clearing process is complete when the pressure differential of the reactivated working tube assembly drops to the set value within a set time. If the pressure differential of the reactivated working tube assembly fails to drop to the set value after the set time, the standby tube assembly will be used as a replacement. During maintenance, the reactivated working tube assembly can be removed for offline cleaning, clearing, or replacement.

[0022] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0023] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of the present invention and do not constitute a limitation on the technical solutions of the present invention.

[0024] Figure 1 This is a schematic diagram of the main structure of an air cooler according to an embodiment of the present invention;

[0025] Figure 2 for Figure 1 The diagram shows the left-side view of the air cooler.

[0026] in, Figure 1 and Figure 2 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0027] 100 First delivery pipeline, 200 First valve, 300 Working pipe bundle assembly, 310 First connecting pipe box, 320 Second connecting pipe box, 400 Spare pipe bundle assembly, 500 Second valve, 600 Second delivery pipeline, 700 Differential pressure detection device, 800 Slide rail, 910 Motor, 920 Fan blade, 1000 Mounting bracket. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

[0029] The air cooler provided in the embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the system includes a first delivery pipeline 100, multiple first valves 200, a working tube bundle assembly 300, a standby tube bundle assembly 400, multiple second valves 500, a second delivery pipeline 600, and multiple differential pressure detection devices 700. One end of each of the multiple first valves 200 is connected to one end of the first delivery pipeline 100, and the other end is connected to one end of each of the working tube bundle assembly 300 and the standby tube bundle assembly 400. One end of each of the multiple second valves 500 is connected to one end of the second delivery pipeline 600, and the other end is connected to the other end of each of the working tube bundle assembly 300 and the standby tube bundle assembly 400. Multiple differential pressure detection devices 700 are connected in parallel to each other on the working tube bundle assembly 300 and the standby tube bundle assembly 400. When the differential pressure of the working tube bundle assembly 300 is greater than a set differential pressure, the standby tube bundle assembly 400 is activated, and the working tube bundle assembly 300 with the differential pressure greater than the set differential pressure is deactivated.

[0030] In this air cooler, the working tube bundle assembly 300 is turned on, and the standby tube bundle assembly 400 is turned off. Gas is transported through the air cooler. When the differential pressure detection device 700 detects that the differential pressure of the working tube bundle assembly 300 is greater than the set differential pressure, the blockage caused by the agglomeration of impurities in the working tube bundle assembly 300 is caused by the blockage of the working tube bundle assembly 300. At this time, the standby tube bundle assembly 400 is turned on, and the working tube bundle assembly 300 with the differential pressure greater than the set differential pressure is turned off. The standby tube bundle assembly 400 replaces the working tube bundle assembly 300 with the differential pressure greater than the set differential pressure, ensuring the normal operation of the air cooler and extending the effective operating time of the air cooler.

[0031] When the temperature of the transported gas exceeds the first set temperature, the previously shut-off working tube assembly 300 is activated, while the already activated standby tube assembly 400 is shut off. The high-temperature transported gas then clears the patency of the reactivated working tube assembly 300. If the pressure differential of the reactivated working tube assembly 300 drops to the set value within a set time, the clearing process is complete (this can be achieved manually or automatically). If the pressure differential of the reactivated working tube assembly 300 fails to drop to the set value after the set time, the standby tube assembly 400 will be used as a replacement. During maintenance, the reactivated working tube assembly 300 can be removed for offline cleaning, clearing, or replacement.

[0032] Of course, the backup tube bundle assembly 400 can also be cleared by high-temperature gas delivery after blockage, or even cleaned or replaced offline, which can also achieve the purpose of this application. Its purpose has not departed from the design concept of this invention, and will not be repeated here. All of them should fall within the protection scope of this application.

[0033] When the first valve 200 and the second valve 500 at both ends of the working tube bundle assembly 300 are opened, the working tube bundle assembly 300 is conductive; when the first valve 200 and the second valve 500 at both ends of the working tube bundle assembly 300 are closed, the working tube bundle assembly 300 is shut off. When the first valve 200 and the second valve 500 at both ends of the standby tube bundle assembly 400 are opened, the standby tube bundle assembly 400 is conductive; when the first valve 200 and the second valve 500 at both ends of the standby tube bundle assembly 400 are closed, the standby tube bundle assembly 400 is shut off.

[0034] Alternatively, when the pressure difference of the working tube assembly 300 is greater than the set pressure difference, the backup tube assembly 400 is turned on first, and then the working tube assembly 300 with the pressure difference greater than the set pressure difference is turned off; or, when the pressure difference of the working tube assembly 300 is greater than the set pressure difference, the backup tube assembly 400 is turned on, and the working tube assembly 300 with the pressure difference greater than the set pressure difference is turned off simultaneously; or, when the pressure difference of the working tube assembly 300 is greater than the set pressure difference, the working tube assembly 300 with the pressure difference greater than the set pressure difference is turned off first, and then the backup tube assembly 400 is turned on (but this method is more prone to blockage problems); all of the above can achieve the purpose of this application, and their purpose has not departed from the design concept of this invention, and will not be elaborated here, and should all fall within the protection scope of this application.

[0035] For example, the working tube bundle assembly 300 and the standby tube bundle assembly 400 are detachably installed between the first valve 200 and the second valve 500, satisfying the design requirement that the working tube bundle assembly 300 and the standby tube bundle assembly 400 can be removed after the blockage cannot be cleared.

[0036] For example, such as Figure 2As shown, the working tube bundle assembly 300 includes: a working tube bundle; a first connecting tube box 310, installed at one end of the working tube bundle and detachably connected to the other end of the first valve 200, the working tube bundle and the first valve 200 being connected through the first connecting tube box 310; and a second connecting tube box 320, installed at the other end of the working tube bundle and detachably connected to the other end of the second valve 500, the working tube bundle and the second valve 500 being connected through the second connecting tube box 320.

[0037] For example, the spare tube bundle assembly 400 includes: a spare tube bundle; a third connecting tube box installed at one end of the spare tube bundle and detachably connected to the other end of the first valve 200, the spare tube bundle and the first valve 200 being connected through the third connecting tube box; and a fourth connecting tube box installed at the other end of the spare tube bundle and detachably connected to the other end of the second valve 500, the spare tube bundle and the second valve 500 being connected through the fourth connecting tube box.

[0038] Both the working tube bundle assembly 300 and the standby tube bundle assembly 400 are equipped with fins to improve heat dissipation efficiency. Both the working tube bundle and the standby tube bundle include multiple straight tubes arranged in a matrix (such as arranged in a square or triangular shape), making it easier to clear blockages formed by impurities within the straight tubes.

[0039] For example, such as Figure 1 and Figure 2 As shown, the air cooler also includes: a slide rail 800, a working tube bundle assembly 300, and a spare tube bundle assembly 400 mounted on the slide rail 800. The slide rail facilitates the quick installation and removal of the working tube bundle assembly 300 and the spare tube bundle assembly 400. Multiple slide rails 800 are configured to correspond one-to-one with the working tube bundle assembly 300 and the spare tube bundle assembly 400.

[0040] For example, such as Figure 1 and Figure 2 As shown, the air cooler also includes: a cooling fan with a motor 910 and fan blades 920, positioned towards the working tube bundle assembly 300 and the standby tube bundle assembly 400; and a mounting bracket 1000, on which both the cooling fan and the slide rail 800 are mounted. The cooling fan is used to dissipate heat and cool the working tube bundle assembly 300 and the standby tube bundle assembly 400, thereby reducing the temperature of the transported gas. The transported gas can be natural gas. Multiple cooling fans are configured.

[0041] For example, the working tube bundle assembly 300 includes 2 to 4 sets, the spare tube bundle assembly 400 includes 1 to 2 sets, one set of spare tube bundle assembly 400 replaces one set of working tube bundle assembly 300, and the differential pressure detection device 700 is configured as a differential pressure transmitter.

[0042] For example, the air cooler also includes a control device, where the first valve 200 and the second valve 500 are both electrically controlled valves. The electrically controlled valves and the differential pressure transmitter are electrically connected to the control device, and automated control is achieved through the control device.

[0043] The control method for an air cooler provided in this embodiment of the invention (not shown in the figure) includes: under the control of a control device, when a differential pressure detection device detects that the differential pressure of the working tube bundle assembly is greater than a set differential pressure, it automatically turns on the standby tube bundle assembly and automatically turns off the working tube bundle assembly with the differential pressure greater than the set differential pressure. The standby tube bundle assembly replaces the working tube bundle assembly with the differential pressure greater than the set differential pressure, ensuring normal operation of the air cooler and extending its effective operating time. The normal differential pressure of the working tube bundle assembly can be 5–10 kPag. The set differential pressure can be 15 kPag.

[0044] Of course, manual control can also be used. When the differential pressure detection device detects that the differential pressure of the working tube bundle assembly is greater than the set differential pressure, the standby tube bundle assembly is manually turned on, and the working tube bundle assembly with the differential pressure greater than the set differential pressure is manually turned off. The working tube bundle assembly with the differential pressure greater than the set differential pressure is replaced by the standby tube bundle assembly to ensure the normal operation of the air cooler.

[0045] For example, when the differential pressure detection device detects that the differential pressure of the working tube bundle assembly is greater than the set differential pressure, the backup tube bundle assembly is turned on, the working tube bundle assembly with the differential pressure greater than the set differential pressure is turned off, and the working tube bundle assembly with the differential pressure greater than the set differential pressure is replaced by the backup tube bundle assembly, the control method further includes:

[0046] When the temperature of the delivered gas exceeds a first set temperature (which can be 180 degrees Celsius), the previously shut-off working tube assembly is activated, while the previously activated standby tube assembly is shut off. The high-temperature delivered gas is used to clear the blockage in the reactivated working tube assembly. If the pressure differential of the reactivated working tube assembly drops to a set value (which can be 5 kPag) within a set time (e.g., 10 minutes), the clearing process is complete, and the assembly can be reused. If the pressure differential of the reactivated working tube assembly fails to drop to the set value after the set time, the standby tube assembly will be used instead. During maintenance, the reactivated working tube assembly can be removed for offline cleaning or replacement. This process can be controlled manually or automatically. The delivered gas pressure is approximately 2 MPa, and the temperature is 50–200 degrees Celsius.

[0047] When the first and second valves at both ends of the working tube assembly are opened, the working tube assembly is powered on; when the first and second valves at both ends of the working tube assembly are closed, the working tube assembly is powered off. When the first and second valves at both ends of the standby tube assembly are opened, the standby tube assembly is powered on; when the first and second valves at both ends of the standby tube assembly are closed, the standby tube assembly is powered off.

[0048] Exemplarily, when the differential pressure detection device detects that the differential pressure of the working tube bundle assembly is greater than the set differential pressure, before conducting the standby tube bundle assembly, shutting off the working tube bundle assembly with the differential pressure greater than the set differential pressure, and replacing the working tube bundle assembly with the differential pressure greater than the set differential pressure by the standby tube bundle assembly, the control method further includes:

[0049] When the ambient temperature is higher than the second set temperature (such as in summer), the air cooler conducts a first number of working tube bundle assemblies, and the first number can be three;

[0050] When the ambient temperature is lower than the third set temperature (such as in winter, the second set temperature is higher than the third set temperature), the air cooler conducts a second number of working tube bundle assemblies, and the second number can be two. If there are three groups of working tube bundle assemblies, only two groups of working tube bundle assemblies need to be conducted, and the other one can also be used as a standby tube bundle assembly, so as to prevent the occurrence of "frozen blockage" and ensure relatively stable cooling effect of the air cooler under different ambient temperatures.The above process can be manually controlled or automatically controlled.

[0051] In summary, for the air cooler provided by the embodiment of the present invention, when the working tube bundle assembly is conducted and the standby tube bundle assembly is shut off, and the conveying gas is conveyed through the air cooler, when the differential pressure detection device detects that the differential pressure of the working tube bundle assembly is greater than the set differential pressure, the block formed by impurity agglomeration blocks the working tube bundle assembly. At this time, the standby tube bundle assembly is conducted, the working tube bundle assembly with the differential pressure greater than the set differential pressure is shut off, and the working tube bundle assembly with the differential pressure greater than the set differential pressure is replaced by the standby tube bundle assembly to ensure the normal use of the air cooler and extend the effective operation time of the air cooler.

[0052] When the temperature of the conveying gas is higher than the first set temperature, the shut-off working tube bundle assembly is opened, the conducted standby tube bundle assembly is shut off, and the re-conducted working tube bundle assembly is dredged by the high-temperature conveying gas. When the differential pressure of the re-conducted working tube bundle assembly drops to the set value within the set time, the dredging of the re-conducted working tube bundle assembly is completed. If the differential pressure of the re-conducted working tube bundle assembly still cannot drop to the set value after the set time, it is still replaced by the standby tube bundle assembly, and the re-conducted working tube bundle assembly can be removed for offline cleaning and dredging or replacement during maintenance.

[0053] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "opposite", "four corners", "perimeter", "the structure of the character 'kou'", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the structure referred to has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0054] In the description of the embodiments of the present invention, unless otherwise expressly specified and limited, the terms "connection," "direct connection," "indirect connection," "fixed connection," "installation," and "assembly" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. The terms "installation," "connection," and "fixed connection" can refer to a direct connection or an indirect connection through an intermediate medium, or they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0055] While the embodiments disclosed in this invention are as described above, the content is merely for the purpose of facilitating understanding of the invention and is not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and changes to the form and details of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection of this invention shall still be defined by the appended claims.

Claims

1. An air cooler characterized by comprising: The first conveying pipeline, a plurality of first valves, a working tube bundle assembly, a standby tube bundle assembly, a plurality of second valves, a second conveying pipeline and a plurality of differential pressure detection devices are included. One end of each of the plurality of first valves is connected to one end of the first conveying pipeline, and the other end is connected to one end of the working tube bundle assembly and the standby tube bundle assembly one by one. One end of each of the plurality of second valves is connected to one end of the second conveying pipeline, and the other end is connected to the other end of the working tube bundle assembly and the standby tube bundle assembly one by one. The plurality of differential pressure detection devices are connected in parallel one by one on the working tube bundle assembly and the standby tube bundle assembly. The conveying gas extracted from the formation is conveyed through the air cooler, and the temperature of the conveying gas is 50-200 degrees. The air cooler further includes a control device. Under the control of the control device, when the differential pressure of the working tube bundle assembly is greater than the set differential pressure, the first valve and the second valve of the standby tube bundle assembly are turned on, and the first valve and the second valve of the working tube bundle assembly with the differential pressure greater than the set differential pressure are turned off. When the temperature of the conveying gas is higher than the first set temperature, the first valve and the second valve of the working tube bundle assembly that have been turned off are opened, and the first valve and the second valve of the standby tube bundle assembly that have been turned on are turned off. The working tube bundle assembly that has been turned on is dredged by the conveying gas, and the first set temperature is 180 degrees.

2. The air cooler according to claim 1, characterized in that The working tube bundle assembly and the standby tube bundle assembly are detachably installed between the first valve and the second valve.

3. The air cooler according to claim 2, wherein The working tube bundle assembly includes: a working tube bundle; a first connecting pipe box installed at one end of the working tube bundle and detachably connected to the other end of the first valve; and a second connecting pipe box installed at the other end of the working tube bundle and detachably connected to the other end of the second valve.

4. The air cooler according to claim 2, wherein The standby tube bundle assembly includes: a standby tube bundle; a third connecting pipe box installed at one end of the standby tube bundle and detachably connected to the other end of the first valve; and a fourth connecting pipe box installed at the other end of the standby tube bundle and detachably connected to the other end of the second valve.

5. The air cooler according to claim 1, wherein Further including: a slide rail on which the working tube bundle assembly and the standby tube bundle assembly are installed.

6. The air cooler according to claim 5, wherein Further including: a cooling fan arranged towards the working tube bundle assembly and the standby tube bundle assembly; and a mounting rack on which the cooling fan and the slide rail are installed.

7. The air cooler according to claim 1, wherein The working tube bundle assembly includes 2-4 groups, the standby tube bundle assembly includes 1-2 groups, fins are installed on the working tube bundle assembly and the standby tube bundle assembly, and the differential pressure detection device is a differential pressure transmitter.

8. A control method of an air cooler according to any one of claims 1 to 7, characterized by, When the differential pressure detection device detects that the differential pressure of the working tube bundle assembly is greater than the set differential pressure, the standby tube bundle assembly is turned on, the working tube bundle assembly with the differential pressure greater than the set differential pressure is turned off, and the working tube bundle assembly with the differential pressure greater than the set differential pressure is replaced by the standby tube bundle assembly. ​ When the temperature of the conveying gas is higher than a first set temperature, the working tube bundle assembly that has been turned off is turned on, the standby tube bundle assembly that has been turned on is turned off, and the working tube bundle assembly that has been turned on is purged by the conveying gas.

9. The control method of the air cooler according to claim 8, characterized by, When the pressure difference detection device detects that the pressure difference of the working tube bundle assembly is greater than a set pressure difference, the standby tube bundle assembly is turned on, the working tube bundle assembly with the pressure difference greater than the set pressure difference is turned off, and the working tube bundle assembly with the pressure difference greater than the set pressure difference is replaced by the standby tube bundle assembly, and before the replacement, the control method further comprises: When the ambient temperature is higher than a second set temperature, the air cooler turns on a first number of the working tube bundle assemblies; When the ambient temperature is lower than a third set temperature, the air cooler turns on a second number of the working tube bundle assemblies; Wherein, the second set temperature is greater than the third set temperature, and the first number is greater than the second number.

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