Flow guide ring assembly and air conditioning unit

Abstract

The invention provides a flow guide ring assembly and an air conditioning unit. The flow guide ring assembly comprises a body and a flow guide ring, wherein the body is provided with an air inlet; and the adjusting mechanism is arranged on the air inlet, and the adjusting mechanism can adjust the effective circulation area of the air inlet. According to the flow guide ring assembly and the air conditioning unit, the flow area of the air inlet is adjusted through the adjusting mechanism so as to adjust the air inlet amount of the air conditioning unit, and the situation that in the prior art, adjustment of a compressor and a draught fan cannot solve the influence of the low environment temperature on the air conditioning unit is avoided; the problems that return air carries liquid and refrigerating capacity is reduced can be avoided, the condensing temperature of the air conditioning unit is stabilized in a reasonable interval, stable operation and working efficiency of the air conditioning unit are guaranteed, the air conditioning unit can reliably work at the environment temperature of-50 DEG C, temperature reliability of electronic components is guaranteed, and the service life of the air conditioning unit is prolonged. And the safety and the reliability of the structure of the electronic component are further ensured.

Description

Technical Field

[0001] The invention relates to the technical field of air handling equipment, in particular to a guide ring component and an air conditioning unit. Background Art

[0002] With the development of the times and the advancement of science and technology, the integration of electronic components is getting higher and higher, the heat flux density of integrated components has increased significantly, and the power consumption has further increased. Even in the cold winter, a dedicated liquid-cooled air-conditioning unit is needed to cool it down. Air-cooled chillers are a common type of liquid-cooled air-conditioning unit. The working principle of air-cooled chillers is to use refrigerants to absorb and release heat during evaporation and condensation. The refrigerant runs along a closed loop and completes the cycle through the process of compression and expansion. In the compressor, the refrigerant is compressed into a high-pressure gas, and then dissipates heat through the condenser to cool it into a liquid state. The liquid refrigerant enters the evaporator after being throttled by the expansion valve, evaporates in the evaporator to become a low-temperature, low-pressure gas, absorbs the surrounding heat, and reduces the temperature of the chilled water in the evaporator. The low-temperature chilled water is transported to the cold plate of the electronic components to take away the heat of the components to prevent the components from being damaged by excessive temperature.

[0003] Air-cooled chillers use wind from the outdoor environment as a medium to dissipate heat from the condenser, thereby adjusting the condensing pressure and condensing temperature. However, the adjustment of the compressor and fan is limited, and the temperature of the outdoor environment is uncontrollable. The outdoor temperature will change with the seasons. In areas with higher altitudes or more remote areas, the ambient temperature in winter can reach -45°C or even lower. When the ambient temperature is too low, the condensing temperature cannot be stabilized by the frequency modulation of the compressor and fan, resulting in the condensing temperature being too low. A too low condensing temperature will reduce the throttling loss of the expansion valve, and the specific enthalpy of the refrigerant at the condenser outlet is very low, resulting in an increase in the cooling capacity that can be provided by the unit mass of refrigerant. When the refrigerant flow rate and the cooling capacity demand of the unit remain unchanged, the cooling capacity stored in the refrigerant cannot be completely released, which can easily lead to incomplete evaporation of the refrigerant in the evaporator, causing the problem of liquid in the return air. It will also cause the high and low pressure difference of the system to decrease, and the ability to overcome the resistance of the throttling device will decrease. The refrigerant circulation flow of the air-conditioning unit will decrease, the cooling capacity will decrease, the heat transfer ability of the refrigerant in the evaporator will decrease, and the evaporation will be insufficient. The compressor inlet pressure will also decrease, and the cold inside the system cannot be dissipated in time. The refrigeration system will also have low-pressure alarm shutdown, evaporator freezing, compressor liquid shock damage and other faults, resulting in unit function failure and inability to effectively cool the equipment. In severe cases, it will cause electronic components to overheat and damage the equipment, causing great losses. Summary of the invention

[0004] In order to solve the technical problem in the prior art that the adjustment of the compressor and the condensing fan cannot ensure the reliability and working efficiency of the air-conditioning unit, a guide ring assembly and an air-conditioning unit are provided for adjusting the air inlet area of ​​the air-conditioning unit to ensure the reliability and working efficiency of the air-conditioning unit.

[0005] A guide ring assembly, comprising:

[0006] A body, wherein the body has an air inlet;

[0007] The regulating mechanism is arranged on the air inlet, and the regulating mechanism can adjust the effective flow area of ​​the air inlet.

[0008] The adjusting mechanism comprises an aperture arm, which is movably arranged on the main body, and the adjusting mechanism has a avoiding state in which the aperture arm completely avoids the air inlet and a shielding state in which at least a part of the aperture arm shields the air inlet.

[0009] The number of the aperture arms is at least two, and all the aperture arms are distributed in a ring shape with the axis of the air inlet as the axis.

[0010] The adjustment mechanism also includes a driving member, which is connected to all the aperture arms and can drive the aperture arms to move.

[0011] The adjustment mechanism also includes a guide ring, which is rotatably arranged on the main body. The driving member and all the aperture arms are connected to the guide ring, and the driving member can drive all the aperture arms to move simultaneously through the guide ring.

[0012] The outer edge of the guide ring is provided with a first meshing tooth, the driving member has a second meshing tooth, and the first meshing tooth and the second meshing tooth are meshed with each other.

[0013] The aperture arm is provided with a guide rod, the guide ring is provided with a slide groove, the guide rod is movably arranged in the slide groove, and the length direction of the slide groove forms an angle with the tangential direction of the guide ring where the slide groove is located.

[0014] When the adjustment mechanism is in the shielding state, two adjacent aperture arms at least partially overlap; and / or, among two adjacent aperture arms, a portion of the top surface of one aperture arm and a portion of the bottom surface of the other aperture arm fit together.

[0015] The adjustment mechanism further comprises a fixing ring, wherein the fixing ring is arranged on the main body, and the aperture arm is located between the fixing ring and the main body.

[0016] The relationship between the effective flow area S1 of the air inlet when the regulating mechanism is in the avoidance state and the effective flow area S2 of the air inlet when the regulating mechanism is in the shielding state is: S2≤1 / 2S1.

[0017] An air conditioning unit comprises the above-mentioned guide ring assembly.

[0018] The guide ring assembly and the air-conditioning unit provided by the present invention utilize an adjusting mechanism to adjust the flow area of ​​the air inlet to adjust the air intake volume of the air-conditioning unit, thereby avoiding the problem in the prior art that the adjustment of the compressor and the fan cannot solve the influence of the lower ambient temperature on the air-conditioning unit, and can also avoid the problem of return air carrying liquid and the decrease in cooling capacity, so that the condensing temperature of the air-conditioning unit is stabilized within a reasonable range, ensuring the stable operation and working efficiency of the air-conditioning unit, and enabling the air-conditioning unit to work reliably at an ambient temperature of -50°C, ensuring the temperature of the electronic components is reliable, and further ensuring the safety and reliability of the structure where the electronic components are located. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a guide ring assembly provided in an embodiment of the present invention;

[0020] Figure 2 An exploded view of a guide ring assembly provided in an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of the structure of the adjustment mechanism in the guide ring assembly provided by an embodiment of the present invention in an avoidance state;

[0022] Figure 4 A schematic diagram of the structure of the process in which the adjustment mechanism in the guide ring assembly provided by the embodiment of the present invention switches from the avoidance state to the shielding state;

[0023] Figure 5 A schematic diagram of the structure of an adjustment mechanism in a guide ring assembly provided by an embodiment of the present invention in a shielding state;

[0024] Figure 6 A perspective view of an adjustment mechanism provided for an embodiment of the present invention;

[0025] Figure 7 A schematic diagram of the structure of an aperture arm provided in an embodiment of the present invention;

[0026] Figure 8 A cross-sectional view of an air conditioning unit provided by an embodiment of the present invention;

[0027] In the figure:

[0028] 1. Main body; 11. Air inlet; 21. Aperture arm; 22. Driving member; 23. Guide ring; 24. Guide rod; 25. Slide groove; 26. Fixed ring. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention 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 invention and are not used to limit the present invention.

[0030] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0033] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" 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 direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Air-cooled chillers use wind from the outdoor environment as a medium to dissipate heat from the condenser, thereby adjusting the condensing pressure and condensing temperature. However, the adjustment of the compressor and fan is limited, and the temperature of the outdoor environment is uncontrollable. The outdoor temperature will change with the seasons. In areas with higher altitudes or more remote areas, the ambient temperature in winter can reach -45°C or even lower. When the ambient temperature is too low, the condensing temperature cannot be stabilized by the frequency modulation of the compressor and fan, resulting in the condensing temperature being too low. A too low condensing temperature will reduce the throttling loss of the expansion valve, and the specific enthalpy of the refrigerant at the condenser outlet is very low, resulting in an increase in the cooling capacity that can be provided by the unit mass of refrigerant. When the refrigerant flow rate and the cooling capacity demand of the unit remain unchanged, the cooling capacity stored in the refrigerant cannot be completely released, which can easily lead to incomplete evaporation of the refrigerant in the evaporator, causing the problem of liquid in the return air. It will also cause the high and low pressure difference of the system to decrease, and the ability to overcome the resistance of the throttling device will decrease. The refrigerant circulation flow of the air-conditioning unit will decrease, the cooling capacity will decrease, the heat transfer ability of the refrigerant in the evaporator will decrease, and the evaporation will be insufficient. The compressor inlet pressure will also decrease, and the cold inside the system cannot be dissipated in time. The refrigeration system will also have low-pressure alarm shutdown, evaporator freezing, compressor liquid shock damage and other faults, resulting in unit function failure and inability to effectively cool the equipment. In severe cases, it will cause electronic components to overheat and damage the equipment, causing great losses.

[0035] To this end, the present application provides a Figures 1 to 8 The guide ring assembly shown includes: a body 1, the body 1 having an air inlet 11; an adjusting mechanism, the adjusting mechanism is arranged on the air inlet 11, and the adjusting mechanism can adjust the effective flow area of ​​the air inlet 11. The adjusting mechanism is used to adjust the flow area of ​​the air inlet 11 to adjust the air intake volume of the air conditioning unit, which avoids the problem that the adjustment of the compressor and the fan in the prior art cannot solve the influence of the low ambient temperature on the air conditioning unit, and can also avoid the problem of liquid in the return air and the decrease in refrigeration capacity, so that the condensing temperature of the air conditioning unit is stabilized in a reasonable range, ensuring the stable operation and working efficiency of the air conditioning unit, so that the air conditioning unit can work reliably at an ambient temperature of -50°C, ensuring the temperature of the electronic components is reliable, and then ensuring the safety and reliability of the structure where the electronic components are located.

[0036] When in use, the guide ring assembly is set at the air inlet of the air conditioning unit. The air conditioning unit detects the condensing temperature T and the target value M. When the air conditioning unit has adjusted the compressor operating frequency and the condensing fan frequency, and the condensing temperature T is still less than the target value M, the control adjustment mechanism is adjusted to reduce the effective flow area of ​​the air inlet 11, thereby reducing the air volume of the air conditioning unit. As the air volume decreases, the condensing temperature T will be increased accordingly and eventually reach the target value M, ensuring the stable operation and work efficiency of the air conditioning unit, so that the air conditioning unit can work reliably at an ambient temperature of -50°C, ensuring the temperature of the electronic components is reliable, and then ensuring the safety and reliability of the structure where the electronic components are located. Among them, the effective flow area refers to the flow area that can be used for gas flow. Due to the adjustment of the adjustment mechanism, the maximum value of the effective flow area is the design area of ​​the air inlet 11.

[0037] As an embodiment, the adjustment mechanism includes an aperture arm 21, the aperture arm 21 is movably arranged on the body 1, and the adjustment mechanism has a avoiding state in which the aperture arm 21 completely avoids the air inlet 11 and a shielding state in which at least part of the aperture arm 21 shields the air inlet 11. The aperture arm 21 shields the air inlet 11, thereby directly shielding part of the design area of ​​the air inlet 11, and gas cannot flow at this part of the air inlet 11, so as to adjust the effective flow area of ​​the air inlet 11. When there is no need to adjust the air intake volume of the air-conditioning unit, the adjusting mechanism switches to the avoidance state. At this time, the aperture arm 21 is completely received in the surrounding side of the air inlet 11 without affecting the flow area of ​​the air inlet 11. When the air intake volume of the air-conditioning unit needs to be adjusted, the adjusting mechanism gradually switches from the avoidance state to the blocking state, and the adjusting mechanism can stay at any position between the avoidance state and the blocking state, thereby achieving partial blocking of the air inlet 11, changing the effective flow area of ​​the air inlet 11, and achieving the purpose of adjusting the air intake volume.

[0038] The number of the aperture arms 21 is at least two, and all the aperture arms 21 are distributed in a ring shape with the axis of the air inlet 11 as the axis. The effective flow area of ​​the air inlet 11 is adjusted from multiple directions using multiple aperture arms 21, which can improve the adjustment accuracy of the effective flow area, and in the adjustment process, the aperture arm 21 can gradually approach from the edge of the air inlet 11 to the center of the air inlet 11, so as to preferentially shield the edge position of the air inlet 11, avoid the aperture arm 21 directly shielding the central part of the air inlet 11 and causing turbulence, etc., to ensure that the air conditioning unit can still work reliably during the adjustment process of the adjustment mechanism, thereby ensuring the heat dissipation reliability and safety of electronic components.

[0039] The adjustment mechanism also includes a driving member 22, which is connected to all the aperture arms 21, and the driving member 22 can drive the aperture arms 21 to move. By driving the aperture arms 21 using the driving member 22, automatic adjustment of the adjustment mechanism can be achieved, and the driving accuracy of the driving member 22 can further improve the adjustment accuracy of the effective flow area.

[0040] The adjustment mechanism also includes a guide ring 23, which is rotatably disposed on the main body 1, and the driving member 22 and all the aperture arms 21 are connected to the guide ring 23, and the driving member 22 can simultaneously drive all the aperture arms 21 to move through the guide ring 23. The guide ring 23 is used to enable the power of the driving member 22 to be transmitted to all the aperture arms 21 at the same time, ensuring that all the aperture arms 21 move synchronously at the same time, thereby ensuring the reliability of the adjustment mechanism and the reliability of the guide ring assembly.

[0041] Specifically, a first meshing tooth is provided on the outer edge of the guide ring 23, and the driving member 22 has a second meshing tooth. The first meshing tooth and the second meshing tooth are meshed with each other, and the second meshing tooth is provided on the rotating shaft of the driving member 22. When the driving member 22 works, the rotating shaft rotates, and the second meshing tooth can transmit the movement to the first meshing tooth through meshing, thereby causing the guide ring 23 to rotate, and all the aperture arms 21 are connected to the guide ring 23. The rotation of the guide ring 23 can drive all the aperture arms 21 to move, ensuring that all the aperture arms 21 move synchronously at the same time, thereby ensuring the reliability of the adjustment mechanism and the reliability of the guide ring assembly.

[0042] like Figure 2 As shown, a guide rod 24 is provided on the aperture arm 21, and a slide groove 25 is provided on the guide ring 23. The guide rod 24 is movably arranged in the slide groove 25. The rotation of the guide ring 23 causes the slide groove 25 to move, and the guide rod 24 can be squeezed by the side wall of the slide groove 25 to force the aperture arm 21 to move. Since the aperture arm 21 is hinged to the body 1, the aperture arm 21 can rotate along the hinge axis, thereby achieving the purpose of the aperture arm 21 blocking the air inlet 11. In order to transmit the rotation of the guide ring 23 to the arc-shaped swing of the aperture arm 21, the length direction of the slide groove 25 and the tangential direction of the guide ring 23 where the slide groove 25 is located have an angle, the slide groove 25 will rotate along the rotation of the guide ring 23, and the guide rod 24 will move along the length direction of the slide groove 25. At this time, the rotation of the slide groove 25 can be converted into an arc-shaped movement of the guide rod 24, thereby achieving the purpose of the aperture arm 21 swinging.

[0043] When the adjustment mechanism is in the shielding state, the two adjacent aperture arms 21 at least partially overlap, and the two adjacent aperture arms 21 are sealed by using the partially overlapping aperture arms 21. During the adjustment process, the aperture arms 21 gradually move from the edge of the air inlet 11 to the center of the air inlet 11. At this time, due to the partial overlap between the aperture arms 21, the effective flow area of ​​the air inlet 11 can be adjusted in a manner of gradually reducing the diameter, thereby improving the reliable adjustment of the effective flow area of ​​the air inlet 11 by the adjustment mechanism.

[0044] Among the two adjacent aperture arms 21, a portion of the top surface of one aperture arm 21 is in contact with a portion of the bottom surface of the other aperture arm 21, and the two adjacent aperture arms 21 are sealed by using the partially overlapping aperture arms 21. During the adjustment process, the aperture arm 21 gradually moves from the edge of the air inlet 11 to the center of the air inlet 11. At this time, due to the partial overlap between the aperture arms 21, the effective flow area of ​​the air inlet 11 can be adjusted in a manner of gradually reducing the diameter, thereby improving the reliable adjustment of the effective flow area of ​​the air inlet 11 by the adjustment mechanism.

[0045] The adjustment mechanism further includes a fixing ring 26, which is disposed on the body 1, and the aperture arm 21 is located between the fixing ring 26 and the body 1. The fixing ring 26 is used to fix the aperture arm 21, so that the aperture arm 21 can move along a set path, thereby preventing the aperture arm 21 from being separated from the guide ring body 1, and also preventing the guide rod 24 of the aperture arm 21 from being separated from the slide groove 25, thereby ensuring the structural reliability of the adjustment mechanism and the guide ring assembly.

[0046] Among them, the relationship between the effective flow area S1 of the air inlet 11 when the adjusting mechanism is in the avoidance state and the effective flow area S2 of the air inlet 11 when the adjusting mechanism is in the blocking state is: S2≤1 / 2S1, so as to avoid S2 being too large to reliably adjust the air intake volume of the air-conditioning unit, and also to avoid S2 being too small to ensure the minimum air intake volume required by the air-conditioning unit.

[0047] An air conditioning unit comprises the above-mentioned guide ring assembly.

[0048] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A guide ring assembly, characterized in that: include: A main body (1), wherein the main body (1) has an air inlet (11); An adjusting mechanism is provided on the air inlet (11), and the adjusting mechanism is capable of adjusting the effective flow area of ​​the air inlet (11).

2. The guide ring assembly according to claim 1, characterized in that: The adjustment mechanism comprises an aperture arm (21), the aperture arm (21) being movably arranged on the body (1), and the adjustment mechanism having an avoidance state in which the aperture arm (21) completely avoids the air inlet (11) and a shielding state in which at least a portion of the aperture arm (21) shields the air inlet (11).

3. The guide ring assembly according to claim 2, characterized in that: The number of the aperture arms (21) is at least two, and all the aperture arms (21) are distributed in a ring shape with the axis of the air inlet (11) as the axis.

4. The guide ring assembly according to claim 3, characterized in that: The adjustment mechanism further comprises a driving member (22), wherein the driving member (22) is connected to all the aperture arms (21), and the driving member (22) can drive the aperture arms (21) to move.

5. The guide ring assembly according to claim 4, characterized in that: The adjustment mechanism also includes a guide ring (23), which is rotatably arranged on the body (1), the driving member (22) and all the aperture arms (21) are connected to the guide ring (23), and the driving member (22) can simultaneously drive all the aperture arms (21) to move through the guide ring (23).

6. The guide ring assembly according to claim 5, characterized in that: The outer edge of the guide ring (23) is provided with first meshing teeth, the driving member (22) has second meshing teeth, and the first meshing teeth and the second meshing teeth mesh with each other.

7. The guide ring assembly according to claim 5, characterized in that: The aperture arm (21) is provided with a guide rod (24), the guide ring (23) is provided with a slide groove (25), the guide rod (24) is movably arranged in the slide groove (25), and the length direction of the slide groove (25) and the tangential direction of the guide ring (23) where the slide groove (25) is located have an included angle.

8. The guide ring assembly according to claim 3, characterized in that: When the adjustment mechanism is in the shielding state, two adjacent aperture arms (21) at least partially overlap; and / or, of the two adjacent aperture arms (21), a portion of the top surface of one aperture arm (21) and a portion of the bottom surface of the other aperture arm (21) fit each other.

9. The guide ring assembly according to claim 2, characterized in that: The adjustment mechanism further comprises a fixing ring (26), wherein the fixing ring (26) is arranged on the main body (1), and the aperture arm (21) is located between the fixing ring (26) and the main body (1).

10. The guide ring assembly according to claim 2, characterized in that: The relationship between the effective flow area S1 of the air inlet (11) when the regulating mechanism is in the avoidance state and the effective flow area S2 of the air inlet (11) when the regulating mechanism is in the shielding state is: S2≤1 / 2S1.

11. An air conditioning unit, characterized in that: The invention comprises the guide ring assembly according to any one of claims 1 to 10.

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