CN111031760A - Low-temperature cover, machine room air conditioner and control method - Google Patents
Low-temperature cover, machine room air conditioner and control method Download PDFInfo
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- CN111031760A CN111031760A CN201911327448.3A CN201911327448A CN111031760A CN 111031760 A CN111031760 A CN 111031760A CN 201911327448 A CN201911327448 A CN 201911327448A CN 111031760 A CN111031760 A CN 111031760A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims abstract description 59
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 7
- 238000009833 condensation Methods 0.000 claims description 6
- 230000005494 condensation Effects 0.000 claims description 6
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims 1
- 238000004378 air conditioning Methods 0.000 abstract description 29
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
- H05K7/20836—Thermal management, e.g. server temperature control
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- Air Conditioning Control Device (AREA)
Abstract
The invention provides a low-temperature cover, a machine room air conditioner and a control method, and belongs to the technical field of air conditioners. The machine room air conditioner comprises the low-temperature cover, a pressure sensor, an outer fan and a controller. According to the low-temperature cover, the machine room air conditioner and the control method, when the pressure in the air conditioning system is normal, the air outlet mechanism is completely opened, when the pressure in the air conditioning system is lower than a preset value and the outer fan at the condenser is at the lowest rotating speed and cannot be adjusted, the air outlet mechanism can be closed to a certain gear, the air quantity discharged from the air outlet of the cover body is reduced, so that the heat loss at the condenser is reduced, the pressure in the air conditioning system is increased, and the situation that the outer fan of the system can be at the minimum gear and stops working back and forth with the outer fan can be avoided, and the high-pressure huge fluctuation of the system is caused. The air outlet temperature is greatly fluctuated, and the stability of the internal pressure of the air conditioning system is kept.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a low-temperature cover, a machine room air conditioner and a control method.
Background
A data center is a globally collaborative network of devices that is used to communicate, accelerate, present, compute, store data information over an internet network infrastructure. Most of the electronic components of the data center are driven by low direct current power supplies to operate. Air conditioning units are used to maintain the temperature and humidity in the room of a data center within a constant range. However, in the low-temperature starting process of the air conditioner in the machine room in winter, the condenser is naturally cooled by low-temperature air, and in addition, the lowest rotating speed of the outer fan is limited to a certain extent for motor lubrication and cannot be set to be very low, so that if the outer fan runs at the minimum wind gear, the high pressure of the system is not increased, the low pressure of the system is very low, and the refrigerant flow difference triggers the low-pressure alarm to stop. If the external fan is not started, the high pressure of the system can be increased to be very high, the high-pressure alarm is triggered to stop, and the real external fan of the system can be in the minimum wind gear and can do back and forth actions with the stop of the external fan, so that the high pressure of the system is greatly fluctuated. Causing the outlet air temperature of the indoor unit to fluctuate greatly.
Disclosure of Invention
The invention aims to provide a low-temperature cover, a machine room air conditioner and a control method, and aims to solve the problem that the fluctuation range of the outlet air temperature of an indoor unit is large in the low-temperature starting process of the machine room air conditioner.
In order to achieve the purpose, the invention adopts the technical scheme that: the low-temperature cover is arranged at an air outlet of an outdoor unit of an air conditioner and comprises a cover body, an air outlet and an air outlet mechanism, wherein the cover body is used for covering the air outlet of the outdoor unit and is communicated with the air outlet of the outdoor unit, the air outlet is arranged on the cover body, and the air outlet is arranged at the air outlet and is used for adjusting the air outlet of the cover body.
As another embodiment of the present application, the air outlet mechanism includes at least one rotating baffle rotatably disposed at the air outlet of the cover body, and a pushing structure for pushing the rotating baffle to rotate, and the plurality of rotating baffles are parallel to each other and are juxtaposed at the air outlet.
As another embodiment of this application, it includes that a plurality of settings are respectively in to promote the structure the rotation push rod of rotating the baffle side, be used for with a plurality of the connecting plate that rotation push rod is connected and be used for promoting the power pack of connecting plate motion, the one end of rotation push rod is connected and is set up rotating the baffle side other end plate hinged joint is connected on the connecting plate.
As another embodiment of this application, the power unit is for setting up the electric putter of cover body side, electric putter's expansion end with the connecting plate is articulated to be connected, electric putter's stiff end also articulates the setting on the side of the cover body.
As another embodiment of this application, two the edge that the rotation baffle contacted still is provided with and is used for the sealed seal structure in the gap between two rotation baffles, rotation baffle with also be provided with between the lateral wall of the cover body seal structure.
As another embodiment of the present application, the sealing structure includes an accommodating groove disposed on a side surface of the rotating baffle, and a bent edge disposed adjacent to the side surface of the rotating baffle and used for penetrating into the accommodating groove when the rotating baffle is closed.
As another embodiment of the present application, a plurality of fixing devices for fixing the cover to the outdoor unit are further disposed outside the cover, and the plurality of fixing devices are disposed at the air inlet of the cover near the air outlet of the outdoor unit.
As another embodiment of this application, fixing device is including setting up the fixing base of cover body side, setting are in on the fixing base and one end with fixing base articulated locking handle and with locking handle middle part articulated locking link.
The low-temperature cover provided by the invention has the beneficial effects that: compared with the prior art, the air outlet of the air conditioner outdoor unit is provided with the cover body communicated with the air outlet, the cover body is provided with the air outlet, and the air outlet is also provided with the air outlet mechanism used for adjusting the air output of the air outlet. When the air conditioner is started at low temperature in winter, the air outlet mechanism is completely opened when the pressure in the air conditioning system is normal, and when the pressure in the air conditioning system is lower than a preset value and the outer fan at the condenser is at the lowest rotating speed and cannot be adjusted, the air outlet mechanism can be closed to a certain gear to reduce the air volume discharged from the air outlet of the cover body, so that the heat loss at the condenser is reduced, the pressure in the air conditioning system is increased, and the condition that the outer fan of the system can be at the minimum gear and stops working back and forth with the outer fan to cause large fluctuation of high pressure of the system can be avoided. The air outlet temperature is greatly fluctuated, and the stability of the internal pressure of the air conditioning system is kept.
The invention also provides a machine room air conditioning device which comprises the low-temperature cover, a pressure sensor for detecting the pressure at the outlet of the condenser, an outer fan for discharging the air of the condenser passing through the condenser, and a controller for controlling the rotating speed of the outer fan and the opening and closing of the air outlet mechanism, wherein the pressure sensor is also electrically connected with the controller.
The machine room air conditioner provided by the invention has the beneficial effects that: compared with the prior art, the low-temperature cover capable of adjusting the air exhaust amount is arranged at the air outlet of the air conditioner outdoor unit. When the air conditioner is started at low temperature in winter, the air outlet mechanism is completely opened when the pressure in the air conditioning system is normal, when the pressure in the air conditioning system is lower than a preset value and the outer fan at the condenser is at the lowest rotating speed and cannot be adjusted, the air outlet mechanism can be closed to a certain gear to reduce the air volume discharged from the air outlet of the cover body, so that the heat loss at the condenser is reduced, the pressure in the air conditioning system is increased, and the situation that the outer fan of the system can be at the minimum gear and stops working back and forth with the outer fan to cause large fluctuation of high pressure of the system can be avoided. The air outlet temperature is greatly fluctuated, and the stability of the internal pressure of the air conditioning system is kept.
The invention also provides a control method of the machine room air conditioner, which comprises the following steps:
step a: sending a starting instruction to the compressor, starting the compressor, sending an opening adjusting instruction to the air outlet mechanism, and adjusting the opening of the air outlet mechanism to be fully opened;
step b: acquiring condensation pressure at a condenser position detected by a pressure sensor, and adjusting the rotating speed of an outer fan according to the condensation pressure detected by the pressure sensor;
step c: when the external fan is in the minimum gear, the condensing pressure is smaller than a first preset pressure and lasts for a first preset time, stopping adjusting the external fan;
step d: sending an opening adjusting instruction to the air outlet mechanism, and reducing the opening of the air outlet mechanism by one gear;
step e: when the condensing pressure is smaller than the first preset pressure and lasts for the first preset time, the step d is repeatedly executed, when the condensing pressure is larger than the first preset pressure and smaller than the second preset pressure and lasts for the first preset time, the opening degree of the air outlet mechanism is kept unchanged, and otherwise, the step f is executed;
step f, sending an opening degree adjusting instruction to the air outlet mechanism, and increasing the opening degree of the air outlet mechanism by one gear;
step g, repeating the step e to the step f, and when the condensing pressure is greater than a second preset pressure and lasts for a first preset time and the opening of the air outlet mechanism is adjusted to be fully opened, executing the step h;
step h: and c, stopping adjusting the air outlet mechanism, and repeatedly executing the step b.
The control method of the machine room air conditioner has the advantages that: compared with the prior art, when the air conditioner is started at a low temperature in winter, the air outlet mechanism is completely opened when the pressure in the air conditioning system is normal, when the pressure in the air conditioning system is lower than a preset value and the outer fan at the condenser is at the lowest rotating speed and cannot be adjusted, the air quantity discharged from the air outlet of the cover body can be reduced by closing the air outlet mechanism at a certain gear, so that the heat loss at the condenser is reduced, the pressure in the air conditioning system is increased, and the situation that the outer fan of the system can be at the minimum gear and stops working back and forth with the outer fan can be avoided, and the high-pressure huge fluctuation of the system is caused. The air outlet temperature is greatly fluctuated, and the stability of the internal pressure of the air conditioning system is kept.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a cryogenic shield according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a machine room air conditioner provided in an embodiment of the present invention;
fig. 3 is a schematic diagram of internal connection of a machine room air conditioner according to an embodiment of the present invention.
In the figure: 1. a low temperature hood; 11. a cover body; 12. an air outlet; 2. an air outlet mechanism; 21. rotating the baffle; 22. rotating the push rod; 23. a power unit; 24. an accommodating recess; 25. bending edges; 26. a connecting plate; 3. a fixing device; 31. a fixed seat; 32. locking the handle; 33. locking the hanging ring; 4. an indoor unit; 41. an evaporator; 42. a liquid viewing mirror; 43. drying the filter; 44. a throttling member; 5. an outdoor unit; 51. an air outlet; 52. a condenser; 53. a pressure sensor; 54. an outer fan; 55. a compressor; .
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and fig. 2 together, the room air conditioner of the present invention will now be described. The low-temperature hood comprises a hood body 11 which is used for covering the air outlet 51 of the outdoor unit 5 and is communicated with the air outlet 51 of the outdoor unit 5, an air outlet 12 which is arranged on the hood body 11, and an air outlet mechanism 2 which is arranged on the air outlet 12 and is used for adjusting the air output of the air outlet 12 of the hood body 11. The air outlet mechanism 2 can be adjusted between completely closing the air outlet 12 and completely opening the air outlet.
Compared with the prior art, the low-temperature hood provided in this embodiment has the advantages that the hood body 11 communicated with the air outlet 51 is arranged at the air outlet 51 of the outdoor unit 5, the air outlet 12 is arranged on the hood body 11, and the air outlet mechanism 2 for adjusting the air output of the air outlet 12 is further arranged at the air outlet 12. When the air conditioner is started at low temperature in winter, the air outlet mechanism 2 is completely opened when the pressure in the air conditioning system is normal, when the pressure in the air conditioning system is lower than a preset value and the outer fan 54 at the condenser 51 is in the lowest rotating speed and cannot be adjusted, the air quantity discharged from the air outlet 12 of the cover body 11 can be reduced by closing the air outlet mechanism 2 at a certain gear, so that the heat loss at the condenser 51 is reduced, the pressure in the air conditioning system is increased, the high-pressure huge fluctuation of the system caused by the fact that the outer fan 54 of the system is in the minimum gear and stops working back and forth with the outer fan 54 can be avoided, and the large fluctuation of the air outlet temperature is caused, and the stability of the pressure in the system is kept.
In this embodiment, air-out mechanism 2 can set up several predetermined gears according to the actual demand, then adjusts air-out mechanism 2's gear according to the inside pressure of air conditioner cooling system.
As an embodiment of the low temperature hood provided by the present invention, please refer to fig. 2, the air outlet mechanism 2 includes at least one rotating baffle 21 rotatably disposed at the air outlet 12 of the hood body 11, and a pushing structure for pushing the rotating baffle 21 to rotate, wherein the rotating baffles 21 are parallel to each other and are juxtaposed at the air outlet 12. And when rotating baffle 21 all with the plane parallel running that exhaust outlet 12 is located, the edge of a plurality of rotating baffles 21 contacts each other or the overlap joint, make a plurality of rotating baffles 21 seal exhaust outlet 12 department completely, air-out mechanism 2 adopts this kind of structure, can be through rotating a plurality of rotating baffles 21 simultaneously, adjust exhaust outlet 12 department can be through the cross-sectional area of air current, and then be used for adjusting the air flow through exhaust outlet 12, make air-out mechanism 2's regulation more convenient, the stability of system internal pressure has been kept.
Referring to fig. 1, the pushing structure includes a plurality of rotating push rods 22 respectively disposed at the lateral sides of the rotating baffles 21, a connecting plate 26 for connecting the plurality of rotating push rods 22, and a power unit 23 for pushing the connecting plate 26 to move, wherein one end of the rotating push rod 22 is connected to the lateral side of the rotating baffles 21, and the other end of the rotating push rod is hinged to the connecting plate 26. The arrangement of the rotating push rod 22 and the connecting plate 26 can connect a plurality of rotating baffles 21 to each other, and only the connecting plate 26 needs to be pushed to realize the simultaneous rotation of the plurality of rotating baffles 21.
Referring to fig. 1, the power unit 23 is an electric push rod disposed on the lateral surface of the cover body 11, a movable end of the electric push rod is hinged to a connecting plate 26, and a fixed end of the electric push rod is also hinged to the lateral surface of the cover body 11. The electric push rod adopts the installation mode, so that the movable end of the electric push rod and the whole electric push rod can move in the pushing connecting plate 26, and the position of the electric push rod can be conveniently adjusted according to the movement position of the connecting plate 26.
As a specific embodiment of the low temperature hood provided by the present invention, referring to fig. 1, the edge where the two rotating baffles 21 contact is further provided with a sealing structure for sealing the gap between the two rotating baffles 21, and a sealing structure is also provided between the rotating baffles 21 and the side wall of the hood body 11. In the sealing structure, the rotary flap 21 seals the air outlet 12 more tightly when the air outlet 12 is completely sealed.
Referring to fig. 1, as a specific embodiment of the low temperature enclosure provided by the present invention, the sealing structure includes a receiving groove 24 disposed on a side surface of the rotating baffle 21, and a bent edge 25 disposed adjacent to the side surface of the rotating baffle 21 and adapted to penetrate into the receiving groove 24 when the rotating baffle 21 is closed. Hold recess 24 and bend the limit 25 and set up respectively in the both sides face of rotating the baffle 21 to hold recess 24 and bend the limit 25 all with rotating the baffle 21 structure as an organic whole, through punching press integrated into one piece, make the preparation of rotating the baffle 21 more convenient, also make the leakproofness better between the double-phase adjacent rotating the baffle 21 simultaneously.
Referring to fig. 1, as a specific embodiment of the low temperature cover provided by the present invention, a plurality of fixing devices 3 for fixing the cover 11 to the outdoor unit 5 are further disposed outside the cover 11, and the plurality of fixing devices 3 are disposed at the air inlet of the cover 11 near the air outlet 51 of the outdoor unit 5. The fixing device 3 makes the cover 11 and the outdoor unit 5 fixed more firmly and reliably.
Referring to fig. 1, the fixing device 3 includes a fixing base 31 disposed on a side surface of the cover body 11, a locking handle 32 disposed on the fixing base 31 and having one end hinged to the fixing base 31, and a locking hanging ring 33 hinged to a middle portion of the locking handle 32. When the cover 11 and the outdoor unit 5 are fixed to each other, the locking handle 32 is pushed in a direction close to the indoor unit 4, the locking ring 33 is hung on a hook fixed to the outside of the outdoor unit 5, and the locking handle 32 is pulled in a direction of the outdoor unit 5, so that the cover 11 and the outdoor unit 5 can be fixed to each other, and the cover 11 and the outdoor unit 5 can be fixed more quickly and conveniently.
The invention also provides a machine room air conditioner, please refer to fig. 2 and fig. 3, including any one of the above low temperature covers, besides forming the basic components of the air conditioner, also including a pressure sensor 53 for detecting the pressure at the outlet of the condenser 51, an external fan 54 for discharging the air from the condenser 51 through the condenser 51, and a controller for controlling the rotation speed of the external fan 54 and the opening and closing of the air outlet mechanism 2, wherein the pressure sensor 53 is electrically connected with the controller.
The machine room air conditioner provided by the invention has the beneficial effects that: compared with the prior art, the low-temperature cover capable of adjusting the air exhaust amount is arranged at the air outlet 51 of the air conditioner outdoor unit 5. When the air conditioner is started at a low temperature in winter, the air outlet mechanism 2 is completely opened when the pressure in the air conditioning system is normal, when the pressure in the air conditioning system is lower than a preset value and the outer fan 54 at the condenser 51 is in the lowest rotating speed and cannot be adjusted, the air outlet mechanism 2 can be closed to a certain gear to reduce the air volume discharged from the air outlet 12 of the cover body 11, so that the heat loss at the condenser 51 is reduced, the pressure in the air conditioning system is increased, and the situation that the outer fan 54 of the system is in the minimum wind gear and stops working back and forth with the outer fan 54 can be avoided, and the high pressure of the system is greatly fluctuated. The air outlet temperature is greatly fluctuated, and the stability of the internal pressure of the air conditioning system is kept.
The invention also provides a control method of the machine room air conditioner, which comprises the following steps:
step a: sending a starting instruction to the compressor, starting the compressor, sending an opening adjusting instruction to the air outlet mechanism 2, and adjusting the opening of the air outlet mechanism 2 to be fully opened;
step b: acquiring the condensation pressure at the condenser position detected by the pressure sensor 53, and adjusting the rotating speed of the external fan 54 according to the condensation pressure detected by the pressure sensor 53;
step c: when the external fan 54 is in the minimum gear, the condensing pressure is less than the first preset pressure and lasts for the first preset time, stopping adjusting the external fan 54;
step d: sending an opening degree adjusting instruction to the air outlet mechanism 2, and reducing the opening degree of the air outlet mechanism 2 by one gear;
step e: when the condensing pressure is smaller than the first preset pressure and lasts for the first preset time, the step d is repeatedly executed, when the condensing pressure is larger than the first preset pressure and smaller than the second preset pressure and lasts for the first preset time, the opening degree of the air outlet mechanism 2 is kept unchanged, otherwise, the step f is executed;
step f, sending an opening degree adjusting instruction to the air outlet mechanism 2, and increasing the opening degree of the air outlet mechanism 2 by one gear;
step g, repeating the step e to the step f, and when the condensing pressure is greater than the second preset pressure and lasts for the first preset time and the opening of the air outlet mechanism 2 is adjusted to be fully opened, executing the step h;
step h: and c, stopping adjusting the air outlet mechanism 2, and repeatedly executing the step b.
The control method of the machine room air conditioner has the advantages that: compared with the prior art, when the air conditioner is started at a low temperature in winter, the air outlet mechanism 2 is completely opened when the pressure in the air conditioning system is normal, when the pressure in the air conditioning system is lower than a preset value and the outer fan 54 at the condenser 51 is at the lowest rotating speed and cannot be adjusted, the air quantity discharged from the air outlet 12 of the cover body 11 can be reduced by closing the air outlet mechanism 2 at a certain gear, so that the heat loss at the condenser 51 is reduced, the pressure in the air conditioning system is increased, and the situation that the outer fan 54 of the system is at the minimum wind gear and stops the outer fan 54 to move back and forth to cause the huge fluctuation of the high pressure of the system can be avoided. The air outlet temperature is greatly fluctuated, and the stability of the internal pressure of the air conditioning system is kept.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The low-temperature cover is characterized by comprising a cover body, an air outlet and an air outlet mechanism, wherein the cover body is used for covering the air outlet of an outdoor unit and is communicated with the air outlet of the outdoor unit, the air outlet is formed in the cover body, and the air outlet mechanism is arranged at the air outlet and is used for adjusting the air outlet amount of the air outlet of the cover body.
2. The cryogenic shield of claim 1 wherein the air-out mechanism comprises at least one rotating baffle rotatably disposed at the air outlet of the shield body, and a pushing structure for pushing the rotating baffle to rotate, wherein a plurality of rotating baffles are parallel to each other and juxtaposed at the air outlet.
3. The cryogenic shield of claim 2 wherein the pushing structure comprises a plurality of rotating push rods respectively disposed at the sides of the rotating baffle, a connecting plate for connecting the plurality of rotating push rods, and a power unit for pushing the connecting plate to move, one end of the rotating push rod is connected to the side of the rotating baffle, and the other end of the rotating push rod is hinged to the connecting plate.
4. The cryogenic shield of claim 3 wherein the power unit is an electric push rod disposed on a side of the shield body, a movable end of the electric push rod is hinged to the connecting plate, and a fixed end of the electric push rod is also hinged to the side of the shield body.
5. The cryogenic shield of claim 2 wherein the edges of said rotating baffles that contact are further provided with a seal for sealing the gap between said rotating baffles, said seal also being provided between said rotating baffles and the side walls of said shield.
6. The cryogenic shield of claim 5 wherein the seal comprises a receiving recess disposed in a side of the rotating baffle and a bent edge disposed adjacent the side of the rotating baffle for penetrating into the receiving recess when the rotating baffle is in the closed position.
7. The cryogenic enclosure of claim 1 wherein the enclosure further comprises a plurality of fastening means on the exterior of the enclosure for fastening the enclosure to an outdoor unit, the fastening means being disposed at the inlet of the enclosure adjacent the outlet of the outdoor unit.
8. The cryogenic shield of claim 7 wherein the fixing means comprises a fixing base disposed on the side of the shield body, a locking handle disposed on the fixing base and having one end hinged to the fixing base, and a locking suspension ring hinged to the middle of the locking handle.
9. A machine room air conditioner, comprising the low temperature hood as claimed in any one of claims 1 to 8, further comprising a pressure sensor for detecting the pressure at the outlet of the condenser, an external fan for exhausting the air from the condenser, and a controller for controlling the rotation speed of the external fan and the opening and closing of the air outlet mechanism, wherein the pressure sensor is also electrically connected with the controller.
10. A control method of a machine room air conditioner is characterized by comprising the following steps:
step a: sending a starting instruction to the compressor, starting the compressor, sending an opening adjusting instruction to the air outlet mechanism, and adjusting the opening of the air outlet mechanism to be fully opened;
step b: acquiring condensation pressure at a condenser position detected by a pressure sensor, and adjusting the rotating speed of an outer fan according to the condensation pressure detected by the pressure sensor;
step c: when the external fan is in the minimum gear, the condensing pressure is smaller than a first preset pressure and lasts for a first preset time, stopping adjusting the external fan;
step d: sending an opening adjusting instruction to the air outlet mechanism, and reducing the opening of the air outlet mechanism by one gear;
step e: when the condensing pressure is smaller than the first preset pressure and lasts for the first preset time, the step d is repeatedly executed, when the condensing pressure is larger than the first preset pressure and smaller than the second preset pressure and lasts for the first preset time, the opening degree of the air outlet mechanism is kept unchanged, and otherwise, the step f is executed;
step f, sending an opening degree adjusting instruction to the air outlet mechanism, and increasing the opening degree of the air outlet mechanism by one gear;
step g, repeating the step e to the step f, and when the condensing pressure is greater than a second preset pressure and lasts for a first preset time and the opening of the air outlet mechanism is adjusted to be fully opened, executing the step h;
step h: and c, stopping adjusting the air outlet mechanism, and repeatedly executing the step b.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911327448.3A CN111031760B (en) | 2019-12-20 | 2019-12-20 | Low-temperature cover, machine room air conditioner and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911327448.3A CN111031760B (en) | 2019-12-20 | 2019-12-20 | Low-temperature cover, machine room air conditioner and control method |
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| Publication Number | Publication Date |
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| CN111031760A true CN111031760A (en) | 2020-04-17 |
| CN111031760B CN111031760B (en) | 2021-10-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114353284A (en) * | 2022-01-07 | 2022-04-15 | 青岛海尔空调电子有限公司 | Control method of air conditioner |
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| CN111031760B (en) | 2021-10-29 |
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