A precision air conditioning high-efficiency machine room energy-saving control device and control method thereof

Abstract

The present invention relates to a precision air-conditioning high-efficiency computer room energy-saving control device and a control method thereof, comprising: a precision air-conditioning, arranged at one side of a computer room; a cold air passage arranged under an elevated floor of the computer room; a plurality of closed cold passages, respectively arranged around the cabinet group to form a sealed passage, the elevated floor being provided with cold air outlets in the area between the cabinets in the closed cold passage; a plurality of bellows, respectively arranged at the bottom of one row of cabinets in the closed cold passage close to the precision air-conditioning, the bellows comprising a movable box body, the movable box body extending out of the bottom of the cabinet and sealing the corresponding cold air outlet; a first connecting pipe, connected between the air outlet of the bellows and the closed cold passage away from the precision air-conditioning, the movable box body transports the air in the bellows to the closed cold passage away from the precision air-conditioning when it is retracted, and causes negative pressure to be generated in the closed cold passage close to the precision air-conditioning.

Description

Technical Field

[0001] The invention relates to the field of refrigeration energy saving, and in particular to a precision air-conditioning high-efficiency machine room energy saving control device and a control method thereof. Background Art

[0002] In order to ensure the heat dissipation effect of IT equipment, it is necessary to dissipate the excess heat in the computer room in a timely manner. In the prior art, precision air conditioners are generally used to output cold air to dissipate the heat of IT equipment in the computer room. At the same time, in order to improve the cooling effect of precision air conditioners on IT equipment in the computer room, the prior art adopts the form of a closed cold channel. The closed cold channel is to place IT equipment face to face, and then close the space between the face-to-face IT equipment to form a closed cold channel. The cold air output by the precision air conditioner is input into the closed cold channel through the air inlet on the bottom plate of the closed cold channel. After passing through the IT equipment, the cold air is dissipated to the outside of the closed cold channel to form hot return air, and the hot return air is cooled by the precision air conditioner to form cold air.

[0003] When there are many IT equipment in the computer room, it is necessary to establish multiple closed cold channels, and the cold air output by the precision air conditioner reaches multiple closed cold channels for heat dissipation. The air volume that a closed cold channel can obtain is inversely proportional to the distance between the closed cold channel and the precision air conditioner. In order for the closed cold channel far away from the precision air conditioner to obtain sufficient cold air volume, the fan speed of the precision air conditioner needs to be increased. However, when the air volume increases, the air flow velocity in the closed cold channel close to the precision air conditioner is too large, and the cold air leaves the closed cold channel before sufficient heat exchange with the IT equipment, causing the hot return air outside the closed cold channel close to the precision air conditioner to remain at a relatively low temperature. Although increasing the air volume ensures that the closed cold channel far away from the precision air conditioner can obtain sufficient cold air volume, it increases the burden on the fan and energy consumption, making it difficult to achieve energy-saving effects.

[0004] In view of the above problems existing in the prior art, the purpose of the present invention is to design a high-efficiency energy-saving control device for a precision air-conditioning room and a control method thereof. Summary of the invention

[0005] In view of the problems existing in the above-mentioned prior art, the present invention provides a precision air-conditioning high-efficiency computer room energy-saving control device and a control method thereof, which can effectively solve at least one problem existing in the above-mentioned prior art.

[0006] The technical solution of the present invention is:

[0007] A precision air-conditioning high-efficiency machine room energy-saving control device is arranged in a machine room, wherein a plurality of rows of cabinets are arranged in the machine room, and the front faces of every two rows of cabinets are arranged opposite to each other to form a cabinet group; comprising:

[0008] Precision air conditioning, installed on one side of the machine room;

[0009] The cold air duct is installed under the raised floor of the machine room;

[0010] A plurality of closed cold channels are respectively arranged around the cabinet group to form a sealed channel, the raised floor is provided with a cold air outlet in the area between the cabinets in the closed cold channel, and the cold air output by the precision air conditioner passes through the cold air channel and enters the closed cold channel from the cold air outlet;

[0011] Also includes:

[0012] A plurality of bellows, each disposed at the bottom of one row of cabinets in the closed cold channel close to the precision air conditioner, the bellows comprising a movable box body, the movable box body being driven by a driving member, the movable box body extending out of the bottom of the cabinet and blocking the corresponding cold air outlet;

[0013] The first connecting pipe is connected between the air outlet of the bellows and the closed cold channel away from the precision air conditioner. When the movable box is retracted, the air in the bellows is transported to the closed cold channel away from the precision air conditioner, and negative pressure is generated in the closed cold channel close to the precision air conditioner.

[0014] Furthermore, the cold air outlet is arranged in a transverse strip shape, the bottom surface of the movable box body is provided with a sealing strip that cooperates with the cold air outlet, and the cold air outlet is provided with a sealing guide rail that cooperates with the sealing strip. During the movement of the movable box body, the sealing strip moves along the sealing guide rail, and after the movable box body is extended, the cold air outlet is blocked by the sealing strip.

[0015] Furthermore, when the movable box body is half extended, the sealing strip blocks the cold air outlet.

[0016] Furthermore, it includes a first temperature sensor, a second temperature sensor and a control system, the first temperature sensor is arranged in the closed cold channel close to the precision air conditioner, and the second temperature sensor is arranged outside the closed cold channel close to the precision air conditioner, and the control system controls the driving part to start working when the temperature difference between the first temperature sensor and the second temperature sensor is less than a preset threshold.

[0017] Further, the first connecting pipe is provided with a first electrically controlled valve, and the first electrically controlled valve is connected to the control system. When the control system controls the driving member to drive the movable box body to extend, the control system controls the first electrically controlled valve to close, and when the control system controls the driving member to drive the movable box body to retract, the control system controls the first electrically controlled valve to open.

[0018] Optionally, a second connecting pipe is provided in the closed cold channel near the precision air conditioner, and the second connecting pipe connects the closed cold channel near the precision air conditioner with the outside.

[0019] Further, the second connecting pipe is provided with a second electrically-controlled valve, and the second electrically-controlled valve is connected to the control system. When the control system controls the driving member to drive the movable box body to extend, the control system controls the second electrically-controlled valve to close. When the control system controls the driving member to drive the movable box body to retract, the control system controls the second electrically-controlled valve to open.

[0020] Furthermore, the bottom of one row of cabinets in the closed cold channel close to the precision air conditioner is hollowed out to form an outer shell of the bellows, and the movable box body is movably connected to the outer shell.

[0021] Furthermore, the air inlet of the bellows is arranged at the bottom and side of the movable box body.

[0022] A control method for a precision air-conditioning high-efficiency computer room energy-saving control device is further provided, based on the precision air-conditioning high-efficiency computer room energy-saving control device, comprising the following steps:

[0023] Obtaining the internal and external temperature difference of the closed cold channel close to the precision air conditioner;

[0024] When the temperature difference between the inside and outside is less than a preset threshold, the air volume of the precision air conditioner is controlled to be reduced to less than 50% of the preset air volume, and the driving element is controlled to start working;

[0025] When the temperature difference between the inside and outside is greater than the preset threshold, the driving component is controlled to stop working, and the air volume of the precision air conditioner is controlled to return to the preset air volume.

[0026] Therefore, the present invention provides the following effects and / or advantages:

[0027] The present application can transport the air in the closed cold channel on one side to the closed cold channel on the other side by cooperating with the movable box body through the closed cold channel. At the same time, the movable box body blocks the cold air outlet, and a negative pressure is formed in the closed cold channel during the contraction of the movable box body. Under the action of the negative pressure, the closed cold channel attracts the cold air from the outside that has not been fully heat exchanged to re-enter the closed cold channel for secondary heat exchange.

[0028] The present application designs the structure of the cold air outlet and the bottom of the movable box body, so that when the movable box body is extended, it can cooperate with the sealing guide rail of the cold air outlet to seal the cold air outlet, so that the cold air output by the precision air conditioner cannot enter the closed cold channel of the precision air conditioner, providing a corresponding structural basis for the process of generating negative pressure when the movable box body contracts.

[0029] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0030] It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0032] Figure 2 It is a schematic diagram of the airflow when the movable box body is not working.

[0033] Figure 3 This is a schematic diagram of the interior of a closed cold channel, in which one of the movable boxes is in an extended state.

[0034] Figure 4 Schematic diagram of airflow when the movable box body is contracted.

[0035] Figure 5 This is a schematic diagram of the structure of the cold air outlet.

[0036] Figure 6 It is a schematic diagram of the bottom surface of the movable box body.

[0037] Description of reference numerals:

[0038] Computer room 1, cabinet 2, precision air conditioner 3, cold air channel 4, closed cold channel 5, cold air outlet 501, sealed guide rail 502, movable box body 6, sealing strip 601, first connecting pipe 7, second connecting pipe 8. DETAILED DESCRIPTION

[0039] In order to facilitate understanding by those skilled in the art, the structure of the present invention is further described in detail with reference to the embodiments in conjunction with the accompanying drawings:

[0040] refer to Figure 1-6 , a precision air conditioning high-efficiency machine room energy-saving control device, arranged in a machine room 1, wherein the machine room 1 is provided with a plurality of rows of cabinets 2, and the front faces of each two rows of cabinets 2 are arranged opposite to each other to form a cabinet group; comprising:

[0041] The precision air conditioner 3 is arranged at one side of the machine room 1; in this embodiment, the precision air conditioner 3 refers to the air conditioner indoor unit.

[0042] A cold air duct 4 provided under the raised floor of the machine room 1;

[0043] A plurality of closed cold channels 5 are respectively arranged around the cabinet group to form a sealed channel, the raised floor is provided with a cold air outlet 501 in the area between the cabinets in the closed cold channel 5, and the cold air output by the precision air conditioner 3 passes through the cold air channel 4 and enters the closed cold channel 5 from the cold air outlet 501;

[0044] In this embodiment, the precision air conditioner 3 and the closed cold channel 5 are directly adopted from the existing technology. After the front sides of every two rows of cabinets 2 are arranged opposite to each other to form a cabinet group, the closed cold channel 5 closes the top, front side and back side between the two rows of cabinets 2, thereby forming a closed space. The back of the cabinet 2 is not closed, and the space outside the back of the cabinet 2 is an open hot channel. The cold air blown out by the precision air conditioner 3 enters the closed cold channel 5 from the cold air channel. The cold air passes through the equipment on the cabinet 2 to take away the heat emitted by the equipment and forms hot return air to enter the open hot channel. The hot return air returns to the precision air conditioner 3, and the heat is taken away by the precision air conditioner 3 to form cold air again and return to the cold air channel. The airflow path can be referred to Figure 2 The number of the closed cold channels 5 in this embodiment is 2.

[0045] A plurality of wind boxes are respectively arranged at the bottom of one row of cabinets 2 in the closed cold channel 5 close to the precision air conditioner 3, and the wind boxes include a movable box body 6, and the movable box body 6 is driven by a driving member. The movable box body 6 extends out of the bottom of the cabinet 2 and blocks the corresponding cold air outlet 501;

[0046] In this embodiment, the bellows is arranged at the bottom of the cabinet 2, and the movable box body 6 and the bottom of the cabinet 2 form a structure similar to a drawer, so that the structure of stretching and retracting can be realized at the bottom of the cabinet 2. The driving member is arranged inside or outside the movable box body 6, and the driving member can be an electric cylinder. When the driving member drives the movable box body 6 to extend, the movable box body 6 sucks the cold air in the closed cold channel 5. When the driving member drives the movable box body 6 to retract, the movable box body 6 discharges the cold air collected inside into the first connecting pipe 7.

[0047] At the same time, the movable box body 6 extends out of the bottom of the cabinet 2 to block the corresponding cold air outlet 501. During this period, cold air cannot enter the closed cold channel 5 near the precision air conditioner 3, and a closed space is formed in the closed cold channel 5.

[0048] The first connecting pipe 7 is connected between the air outlet of the bellows and the closed cold channel 5 away from the precision air conditioner 3. When the movable box body 6 is retracted, the air in the bellows is transported to the closed cold channel 5 away from the precision air conditioner 3, and negative pressure is generated in the closed cold channel 5 close to the precision air conditioner 3.

[0049] In the prior art, since the closed cold channel 5 close to the precision air conditioner 3 can obtain more cold air than the closed cold channel 5 far away from the precision air conditioner 3, in order to meet the heat dissipation requirements of the closed cold channel 5 far away from the precision air conditioner 3, the fan of the precision air conditioner 3 will transport cold air far greater than the preset air volume to the closed cold channel 5 close to the precision air conditioner 3, so that the excess cold air quickly flushes the equipment on the cabinet 2 in the closed cold channel 5 close to the precision air conditioner 3, and cannot fully exchange heat with the equipment on the cabinet 2, so that the temperature difference between the inside and outside of the closed cold channel 5 is small, thereby causing energy waste.

[0050] This embodiment can reduce the output air volume of the fan so that the closed cold channel 5 close to the precision air conditioner 3 can obtain an air volume slightly greater than or equal to the preset air volume. Then, through the connecting function of the first connecting pipe and the active air supply of the bellows to the closed cold channel 5 away from the precision air conditioner 3, the cold air volume obtained by different closed cold channels 5 tends to be the same. At the same time, in the process of the bellows supplying air to the closed cold channel 5 away from the precision air conditioner 3, since the movable box body 6 blocks the corresponding cold air outlet 501, when the movable box body 6 contracts to supply air, Figure 4 , the closed cold channel 5 near the precision air conditioner 3 generates negative pressure, which can absorb the air around the closed cold channel 5 near the precision air conditioner 3, and the surrounding air returns to the closed cold channel 5 through the equipment in the closed cold channel 5, so that the return air outside the closed cold channel 5 that has not been fully heat exchanged and has a low temperature returns to the closed cold channel 5, and the return air takes away the heat again through the active heat dissipation of the equipment. In this way, sufficient heat dissipation and uniform cold air volume in multiple closed cold channels 5 can be achieved under the condition of low speed of the fan of the precision air conditioner 3.

[0051] Further, refer to Figure 5 , 6 The cold air outlet 501 is arranged in a transversely arranged long strip shape, and the bottom surface of the movable box body 6 is provided with a sealing strip 601 matched with the cold air outlet 501, and the cold air outlet 501 is provided with a sealing guide rail 502 matched with the sealing strip. During the movement of the movable box body 6, the sealing strip 601 moves along the sealing guide rail 502 as a trajectory, and the cold air outlet 501 is blocked by the sealing strip 601 after the movable box body 6 is extended.

[0052] In this embodiment, the cold air outlet 501 is configured to be in the shape of a long strip arranged front to back, and the sealing strip 601 is in the shape of a long strip that matches the cold air outlet 501. After the movable box body 6 is extended, the sealing strip 601 and the sealing guide rail 502 cooperate to cover the top of the cold air outlet 501, thereby blocking the cold air outlet 501, so that the cold air blown out by the precision air conditioner 3 cannot enter the closed cold channel 5, so that during the contraction of the movable box body 6, negative pressure is generated in the closed cold channel 5, thereby drawing in air from the outside.

[0053] Furthermore, when the movable box body 6 is half extended, the sealing strip 601 blocks the cold air outlet 501 .

[0054] In this embodiment, the movable box body 6 can completely block the cold air outlet 501 when it is half extended, so that when the movable box body 6 is fully extended and then retracted, the movable box body 6 can still maintain the state of blocking the cold air outlet 501, so that the cold air outlet 501 will not be immediately opened during the retraction process to eliminate the negative pressure environment. The cold air outlet 501 can be arranged on a side close to the movable box body 6, so that the cold air outlet 501 can be completely blocked when the movable box body 6 is half extended.

[0055] Furthermore, it includes a first temperature sensor, a second temperature sensor and a control system, the first temperature sensor is arranged in the closed cold channel 5 close to the precision air conditioner 3, and the second temperature sensor is arranged outside the closed cold channel 5 close to the precision air conditioner 3, and the control system controls the driving part to start working when the temperature difference between the first temperature sensor and the second temperature sensor is less than a preset threshold.

[0056] This embodiment obtains the temperature inside and outside the closed cold channel 5 and calculates the temperature difference between the two. When the temperature difference is less than a preset threshold, it means that the cold air flow in the closed cold channel 5 is too high for a long time, and the cold air cannot exchange heat with the equipment on the cabinet 2 and is discharged to the outside of the closed cold channel 5, indicating that the cold air flow needs to be reduced at this time. Therefore, the control system controls the driving part to start working, blocks the cold air outlet 501 through the movable box body 6, and transports the cold air in the closed cold channel 5 close to the precision air conditioner 3 to the closed cold channel 5 away from the precision air conditioner 3, thereby achieving a balance effect.

[0057] Further, the first connecting pipe 7 is provided with a first electrically-controlled valve, and the first electrically-controlled valve is connected to the control system. When the control system controls the driving member to drive the movable box body 6 to extend, the control system controls the first electrically-controlled valve to close, and when the control system controls the driving member to drive the movable box body 6 to retract, the control system controls the first electrically-controlled valve to open.

[0058] In this embodiment, the first electrically controlled valve can prevent the cold air in the closed cold channel 5 away from the precision air conditioner 3 from being transported to the closed cold channel 5 close to the precision air conditioner 3 during the movement of the movable box body 6, thereby preventing the back suction effect.

[0059] Optionally, the closed cold channel 5 near the precision air conditioner 3 is provided with a second connecting pipe 8, and the second connecting pipe 8 connects the closed cold channel 5 near the precision air conditioner 3 with the outside.

[0060] Furthermore, the second connecting pipe 8 is provided with a second electrically-controlled valve, and the second electrically-controlled valve is connected to the control system. When the control system controls the driving member to drive the movable box body 6 to extend, the control system controls the second electrically-controlled valve to close. When the control system controls the driving member to drive the movable box body 6 to retract, the control system controls the second electrically-controlled valve to open.

[0061] In this embodiment, when the cold air cannot be heat exchanged with the equipment on the cabinet 2 and is discharged to the outside of the closed cold channel 5, the return air outside the closed cold channel 5 still has a relatively low temperature. Through the action of the second connecting pipe 8, when the second solenoid valve is opened and the driving member drives the movable box body 6 to be retracted, the negative pressure in the closed cold channel 5 sucks the relatively low temperature air from the outside through the second connecting pipe 8 for secondary heat absorption. Preferably, the second connecting pipe is arranged at the bottom of the cabinet without the movable box body 6, because the air with a relatively low temperature will sink, and the second connecting pipe 8 at the bottom of the cabinet can obtain the air with a relatively low temperature.

[0062] Optionally, the second connecting pipe 8 may not be provided in this embodiment, and the outside air can be directly reversely flowed from the heat dissipation channel of the equipment on the cabinet 2 into the closed cold channel 5 through the negative pressure effect.

[0063] Furthermore, the bottom of one row of cabinets in the closed cold channel 5 close to the precision air conditioner 3 is hollowed out to form the outer shell of the bellows, and the movable box body 6 is movably connected to the outer shell.

[0064] In this embodiment, the bottom of the cabinet 2 is a square structure, which does not place any equipment, etc. It is hollowed out to form an outer shell for accommodating the bellows, and the movable box body 6 can be movably connected to the inside of the outer shell through a track connection to form a drawer-like structure.

[0065] Furthermore, the air inlet of the bellows is arranged at the bottom and side of the movable box body 6.

[0066] In this embodiment, the air inlet of the bellows can be provided with a one-way valve that conducts one-way air from the outside of the bellows to the inside of the bellows. During the extension of the movable box body 6, the air inlet at the bottom of the movable box body 6 can directly obtain the cold air blown out by the cold air outlet 501, and the air inlet on the side of the movable box body 6 can continue to inhale air when the air inlet at the bottom of the movable box body 6 is blocked by the overhead bottom plate.

[0067] A control method for a high-efficiency energy-saving control device for a precision air conditioner 3 is further provided, which is characterized by comprising the following steps:

[0068] Obtaining the internal and external temperature difference of the closed cold channel 5 close to the precision air conditioner 3;

[0069] When the internal and external temperature difference is less than a preset threshold, the air volume of the precision air conditioner 3 is controlled to be reduced to less than 50% of the preset air volume, and the driving element is controlled to start working;

[0070] When the temperature difference between the inside and outside is greater than the preset threshold, the driving component is controlled to stop working, and the air volume of the precision air conditioner 3 is controlled to return to the preset air volume.

[0071] In this embodiment, the number of closed cold channels 5 is 2. When the internal and external temperature difference is less than the preset threshold, in order to prevent the air volume of the closed cold channel 5 far away from the precision air conditioner 3 from suddenly increasing when the driving member extends the movable box body 6 and closes the cold air outlet 501, it is necessary to reduce the air volume of the precision air conditioner 3 to less than 50% of the preset air volume, so that all the air volume output by the precision air conditioner 3 is sent to the closed cold channel 5 far away from the precision air conditioner 3, and then control the driving member to start working.

[0072] Preferably, the air volume of the precision air conditioner 3 is controlled to be reduced to 30% of the preset air volume. In this case, the air volume of the closed cold channel 5 away from the precision air conditioner 3 can reach about 50% of the preset air volume through the conveying effect of the movable box body 6.

[0073] It should be noted that in the claims, any reference signs placed between brackets shall not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claim. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The invention may be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

[0074] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0075] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

Claims

1. A precision air-conditioning high-efficiency machine room energy-saving control device, arranged in a machine room (1), wherein a plurality of rows of cabinets (2) are arranged in the machine room (1), and each two rows of cabinets (2) are arranged with their front faces facing each other to form a cabinet group; comprising: A precision air conditioner (3) is installed on one side of the machine room (1); A cold air duct (4) disposed under the raised floor of the machine room (1); A plurality of closed cold passages (5) are respectively arranged around the cabinet group to form a sealed passage, the raised floor is provided with a cold air outlet (501) in the area between the cabinets in the closed cold passage (5), and the cold air output by the precision air conditioner (3) passes through the cold air passage (4) and enters the closed cold passage (5) from the cold air outlet (501); It is characterized by: also including: A plurality of wind boxes, each disposed at the bottom of a row of cabinets (2) in the closed cold channel (5) close to the precision air conditioner (3), the wind box comprising a movable box body (6), the movable box body (6) being driven by a driving member, the movable box body (6) extending out of the bottom of the cabinet (2) to block the corresponding cold air outlet (501); The first connecting pipe (7) is connected between the air outlet of the bellows and the closed cold channel (5) away from the precision air conditioner (3). When the movable box (6) is retracted, the air in the bellows is transported to the closed cold channel (5) away from the precision air conditioner (3), and negative pressure is generated in the closed cold channel (5) close to the precision air conditioner (3).

2. A precision air conditioner (3) high-efficiency machine room (1) energy-saving control device according to claim 1, characterized in that: The cold air outlet (501) is configured to be a horizontally arranged long strip, the bottom surface of the movable box body (6) is provided with a sealing strip (601) that matches the cold air outlet (501), and the cold air outlet (501) is provided with a sealing guide rail (502) that matches the sealing strip (601). During the movement of the movable box body (6), the sealing strip (601) moves along the sealing guide rail (502), and after the movable box body (6) is extended, the cold air outlet (501) is blocked by the sealing strip (601).

3. A precision air conditioner (3) high-efficiency machine room (1) energy-saving control device according to claim 2, characterized in that: When the movable box body (6) is half extended, the sealing strip (601) blocks the cold air outlet (501).

4. A precision air conditioner (3) high-efficiency machine room (1) energy-saving control device according to claim 1, characterized in that: The invention comprises a first temperature sensor, a second temperature sensor and a control system, wherein the first temperature sensor is arranged in the closed cold passage (5) close to the precision air conditioner (3), and the second temperature sensor is arranged outside the closed cold passage (5) close to the precision air conditioner (3), and the control system controls the driving element to start working when the temperature difference between the first temperature sensor and the second temperature sensor is less than a preset threshold value.

5. A precision air conditioner (3) high-efficiency machine room (1) energy-saving control device according to claim 4, characterized in that: The first connecting pipe (7) is provided with a first electrically controlled valve, and the first electrically controlled valve is connected to the control system. When the control system controls the driving member to drive the movable box body (6) to extend, the control system controls the first electrically controlled valve to close. When the control system controls the driving member to drive the movable box body (6) to retract, the control system controls the first electrically controlled valve to open.

6. A precision air conditioner (3) high-efficiency machine room (1) energy-saving control device according to claim 4, characterized in that: The closed cold passage (5) near the precision air conditioner (3) is provided with a second connecting pipe (8), and the second connecting pipe (8) connects the closed cold passage (5) near the precision air conditioner (3) with the outside.

7. A precision air conditioner (3) high-efficiency machine room (1) energy-saving control device according to claim 6, characterized in that: The second connecting pipe (8) is provided with a second electrically controlled valve, and the second electrically controlled valve is connected to the control system. When the control system controls the driving member to drive the movable box body (6) to extend, the control system controls the second electrically controlled valve to close. When the control system controls the driving member to drive the movable box body (6) to retract, the control system controls the second electrically controlled valve to open.

8. The energy-saving control device for a precision air conditioner (3) high-efficiency machine room (1) according to claim 1, characterized in that: The bottom of one row of cabinets (2) in the closed cold channel (5) close to the precision air conditioner (3) is hollowed out to form an outer shell of the bellows, and the movable box body (6) is movably connected to the outer shell.

9. A precision air conditioner (3) high-efficiency machine room (1) energy-saving control device according to claim 1, characterized in that: The air inlet of the bellows is arranged at the bottom and side of the movable box body (6).

10. A control method for a precision air conditioner (3) high-efficiency machine room (1) energy-saving control device, characterized in that: A precision air conditioner (3) high-efficiency machine room (1) energy-saving control device according to claim 1, comprising the following steps: Obtaining the temperature difference between the inside and outside of the closed cold channel (5) close to the precision air conditioner (3); When the temperature difference between the inside and outside is less than a preset threshold, the air volume of the precision air conditioner (3) is controlled to be reduced to less than 50% of the preset air volume, and the driving element is controlled to start working; When the temperature difference between the inside and outside is greater than the preset threshold, the driving component is controlled to stop working, and the air volume of the precision air conditioner (3) is controlled to return to the preset air volume.

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