CN208063652U - The naturally cold computer-room air conditioning system of passive type heat pipe - Google Patents
The naturally cold computer-room air conditioning system of passive type heat pipe Download PDFInfo
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- CN208063652U CN208063652U CN201820431007.2U CN201820431007U CN208063652U CN 208063652 U CN208063652 U CN 208063652U CN 201820431007 U CN201820431007 U CN 201820431007U CN 208063652 U CN208063652 U CN 208063652U
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 45
- 238000001816 cooling Methods 0.000 claims abstract description 59
- 238000005057 refrigeration Methods 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 23
- 238000005507 spraying Methods 0.000 claims description 10
- 230000005494 condensation Effects 0.000 claims description 7
- 238000009833 condensation Methods 0.000 claims description 7
- 238000001704 evaporation Methods 0.000 claims description 7
- 230000008020 evaporation Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 239000007921 spray Substances 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
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Abstract
The utility model is related to a kind of naturally cold computer-room air conditioning system of passive type heat pipe, computer-room air conditioning system includes passive type heat pipe circulatory system and auxiliary cold source system；Passive type heat pipe circulatory system includes at least one heat pipe evaporator of setting indoors, and the heat pipe condenser of heat pipe heat exchanging medium is connect, cooled down with heat pipe evaporator and connects heat pipe evaporator and heat pipe condenser, the heat transferring medium compress cell that will be transported to heat pipe evaporator through heat pipe condenser heat pipe heat exchanging medium after cooling；Auxiliary cold source system includes being arranged in heat exchanger that is outdoor, can be used for heat pipe heat exchanging medium and auxiliary cold source progress heat exchange, and heat exchanger includes low-temperature receiver arrival end and the low-temperature receiver outlet end for connecting auxiliary cold source；The outlet of the heat transferring medium arrival end connection heat pipe condenser of heat exchanger, the entrance of the heat transferring medium outlet end connection heat transferring medium compress cell of heat exchanger.The utility model can make full use of natural cooling source to freeze, and realize the energy saving of computer room；Use heat pipe phase-change heat-exchange, heat exchange efficiency high simultaneously.
Description
Technical Field
The utility model relates to a refrigeration technology field, more specifically say, relate to a cold quick-witted room air conditioning system of passive form heat pipe nature.
Background
At present, traditional refrigeration solutions are adopted in many data centers, such as an air-cooling direct expansion type, a chilled water type, an air-cooling double-cold-source type and the like. The traditional cooling scheme mainly has the following defects:
1. the unit air conditioning unit in the traditional scheme is dispersed, occupies a large space and has a single tail end type;
2. the natural cold source under outdoor low-temperature conditions cannot be fully utilized, and the construction requirement of a green energy-saving machine room is difficult to meet;
3. and under the outdoor low-temperature condition, the chilled water coil is easy to freeze and can not carry out normal water supply circulation.
With the recent development of the data center industry and the higher and higher requirements of national energy-saving policies, the application of energy-saving development and high reliability can be the first choice of a green data center construction scheme. Various green energy-saving schemes are promoted under the large background; such as adopting an empty-space connection evaporative cooling scheme, a fresh air cooling scheme, an indirect evaporative cooling scheme taking water as a medium and the like; however, the following disadvantages mainly exist in the application of the current energy-saving cooling scheme:
1. an air-air heat exchange indirect cooling scheme is adopted, so that the heat exchange efficiency is low, and the specification size of the same cold quantity is large; 2. the fresh air cooling scheme has higher fresh air cleaning treatment and later maintenance cost.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a cold quick-witted room air conditioning system of modified passive form heat pipe nature.
The utility model provides a technical scheme that its technical problem adopted is: the air conditioning system of the passive heat pipe natural cooling machine room is characterized by comprising a passive heat pipe circulating system and an auxiliary cold source system;
the passive heat pipe circulating system comprises at least one heat pipe evaporator arranged indoors, a heat pipe condenser connected with the heat pipe evaporator and used for cooling a heat pipe heat exchange medium, and a heat exchange medium pressurizing unit connected with the heat pipe evaporator and the heat pipe condenser and used for conveying the heat pipe heat exchange medium cooled by the heat pipe condenser to the heat pipe evaporator;
the auxiliary cold source system comprises a heat exchanger which is arranged outdoors and can be used for heat exchange between a heat pipe heat exchange medium and an auxiliary cold source, and the heat exchanger comprises a cold source inlet end and a cold source outlet end which are connected with the auxiliary cold source; the heat exchange medium inlet end of the heat exchanger is connected with the outlet of the heat pipe condenser, and the heat exchange medium outlet end of the heat exchanger is connected with the inlet of the heat exchange medium pressurizing unit.
Preferably, the heat exchange medium pressurizing unit comprises a liquid storage tank for storing heat exchange medium of the heat pipe and a heat pipe power pump for pressurizing the heat exchange medium of the heat pipe; the inlet of the liquid storage tank is connected with the outlet of the heat pipe condenser, the outlet of the liquid storage tank is connected with the inlet of the heat pipe power pump, and the outlet of the heat pipe power pump is connected with the inlet of the heat pipe evaporator.
Preferably, a throttle control valve is arranged at an inlet of the heat pipe evaporator, an outlet of the heat pipe power pump is connected with an inlet of the throttle control valve, and an outlet of the throttle control valve is connected with an inlet of the heat pipe evaporator.
Preferably, the auxiliary cold source system further comprises a cold source inlet end arranged on the heat exchanger, an inlet flange used for externally connecting a cold source, and an outlet flange arranged at a cold source outlet end of the heat exchanger.
Preferably, the passive heat pipe natural cooling unit air conditioning system further comprises a bypass branch pipe connected with the heat exchanger in parallel, an inlet end of the bypass branch pipe is connected with an outlet of the heat pipe condenser, and an outlet end of the bypass branch pipe is connected with an inlet of the heat exchange medium pressurizing unit;
the heat exchanger is characterized in that a first electromagnetic valve is arranged at the heat exchange medium inlet end of the heat exchanger, a one-way valve is arranged at the heat exchange medium outlet end of the heat exchanger, and a second electromagnetic valve is arranged on the bypass branch pipe.
Preferably, the heat pipe evaporator is an air-cooled heat pipe evaporator, and the heat pipe condenser is an air-cooled heat pipe condenser; the passive heat pipe circulating system also comprises a heat pipe evaporation fan for supplying air to the heat pipe evaporator and a heat pipe condensation fan for supplying air to the heat pipe condenser.
Preferably, the passive heat pipe circulation system comprises a plurality of heat pipe evaporators connected in parallel, and a throttle control valve is arranged at an inlet of each heat pipe evaporator.
Preferably, the heat exchanger comprises a first heat exchanging part arranged in the heat pipe heat exchange medium circulation loop and a second heat exchanging part arranged in the cold source circulation loop; the heat exchange medium pressurizing unit is connected with the first heat exchange part and the heat pipe evaporator and conveys the heat pipe heat exchange medium cooled by the first heat exchange part to the heat pipe evaporator; the second heat exchange part is connected with an auxiliary cold source and exchanges heat with the heat pipe heat exchange medium in the first heat exchange part through the auxiliary cold source.
Preferably, the passive heat pipe circulation system further comprises a spraying device for spraying and cooling outdoor air.
Implement the utility model discloses a cold room air conditioning system of passive form heat pipe nature has following beneficial effect: 1. the outdoor natural cold source can be fully utilized, and the system is simple and reliable; 2. water is not introduced into a data center machine room, so that the reliability is high; 3. the heat pipe technology is adopted for phase change heat exchange, so that the heat exchange efficiency is high, and the equipment size is small; 4. fresh air is not directly introduced, and the air quality is guaranteed; 5. the evaporation tail end of the heat pipe is flexibly designed, is dispersedly designed according to requirements, meets the requirements of a server cabinet and is not limited by a space structure; 6. the indoor temperature is adjusted according to the heat pipe pump circulating system, reliability control risks such as multi-connection oil return and compressor liquid impact are avoided, and the system operation reliability is improved; 7. the temperature control requirement on the auxiliary cold source system is reduced, and the operation energy efficiency interval of the auxiliary cold source system is improved.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic structural diagram of a first embodiment of a passive heat pipe natural cooling air conditioning system according to the present invention;
fig. 2 is a schematic structural diagram of a second embodiment of the passive heat pipe natural cooling air conditioning system of the present invention;
fig. 3 is a schematic structural diagram of a third embodiment of the passive heat pipe natural cooling air conditioning system of the present invention;
fig. 4 is a schematic structural diagram of a fourth embodiment of the passive heat pipe natural cooling air conditioning system of the present invention;
fig. 5 is a logic block diagram of the first embodiment of the control method of the passive heat pipe natural cooling air conditioning system according to the present invention;
fig. 6 is a logic block diagram of a control method of a passive heat pipe natural cooling air conditioning system according to a second embodiment of the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1-4, the air conditioning system of the natural cooling machine room with passive heat pipes of the present invention comprises: a passive heat pipe circulation system and an auxiliary cold source system; the passive heat pipe circulating system comprises at least one heat pipe evaporator 3 arranged indoors, a heat pipe condenser 4 connected with the heat pipe evaporator 3 and used for cooling a heat pipe heat exchange medium, and a heat exchange medium pressurizing unit connected with the heat pipe evaporator 3 and the heat pipe condenser 4 and used for conveying the heat pipe heat exchange medium cooled by the heat pipe condenser 4 to the heat pipe evaporator 3; the auxiliary cold source system comprises a heat exchanger 6 which is arranged outdoors and can be used for heat exchange between a heat pipe heat exchange medium and an auxiliary cold source, and the heat exchanger 6 comprises a cold source inlet end and a cold source outlet end which are connected with the auxiliary cold source; the heat exchange medium inlet end of the heat exchanger 6 is connected with the outlet of the heat pipe condenser 4, and the heat exchange medium outlet end of the heat exchanger 6 is connected with the inlet of the heat exchange medium pressurizing unit.
In the embodiment of the passive heat pipe natural cooling air conditioning system of the present invention shown in fig. 1-4, the heat pipe evaporator 3 is an air-cooled heat pipe evaporator, and the heat pipe condenser 4 is an air-cooled heat pipe condenser; the passive heat pipe circulating system also comprises a heat pipe evaporation fan for supplying air to the heat pipe evaporator 3 and a heat pipe condensation fan for supplying air to the heat pipe condenser 4. Wherein, the number and the position of the heat pipe evaporators 3 can be designed in a diversified way, and the indoor unit cabinet can be dispersedly served and the problem of local hot spots can be solved.
The quantity of heat pipe evaporimeter 3 can be selected according to actual conditions, can be one, also can be two or more than two, the utility model discloses do not restrict to this. The inlet of each heat pipe evaporator is provided with a throttle control unit, such as a throttle control valve 2 (or 2-1,2-2, …,2-N), matching the heat pipe evaporator. For example, as shown in fig. 3, the third embodiment of the passive heat pipe natural cooling air conditioning system of the present invention is shown in fig. 4, and in the fourth embodiment of the passive heat pipe natural cooling air conditioning system of the present invention, the passive heat pipe circulation system includes a heat pipe evaporator 3, and a throttle control valve 2 is disposed at the inlet of the heat pipe evaporator 3. For another example, as shown in fig. 1, the first embodiment of the passive heat pipe natural cooling air conditioning system of the present invention and shown in fig. 2 are the second embodiment of the passive heat pipe natural cooling air conditioning system of the present invention, the passive heat pipe circulation system includes a plurality of heat pipe evaporators connected in parallel, such as heat pipe evaporator 3-1, heat pipe evaporator 3-2, and … … heat pipe evaporator 3-N, where the inlet of each heat pipe evaporator is provided with a throttle control valve, such as the inlet of heat pipe evaporator 3-1 is provided with throttle control valve 2-1, the inlet of heat pipe evaporator 3-2 is provided with throttle control valve 2-2, and the inlet of … … heat pipe evaporator 3-N is provided with throttle control valve 2-N. Specifically, when the passive heat pipe circulation system includes a plurality of heat pipe evaporators connected in parallel, the inlet ends of the plurality of heat pipe evaporators connected in parallel are connected to the outlet of the heat pipe power pump 1 through a first pipeline, and the outlet ends of the plurality of heat pipe evaporators connected in parallel are connected to the inlet of the heat pipe condenser 4 through a second pipeline. Through the parallel arrangement, the backup of the heat pipe evaporator in the air conditioning system can be realized, the fault probability of the whole system is reduced, and the reliability of the system is improved.
Further, as shown in fig. 1-4, the passive heat pipe circulation system further includes a spraying device 12 for spraying and cooling the outdoor air. Preferably, the spray device 12 is disposed proximate to the heat pipe condenser 4. The spraying device 12 belongs to a device with selectable configuration, and can be selectively configured according to application environment and user requirements.
As shown in fig. 1-4, preferably, the heat exchange medium pressurizing unit comprises a liquid storage tank 7 for storing heat exchange medium of the heat pipe and a heat pipe power pump 1 for pressurizing the heat exchange medium of the heat pipe; the inlet of the liquid storage tank 7 is connected with the outlet of the heat pipe condenser 4, the outlet of the liquid storage tank 7 is connected with the inlet of the heat pipe power pump 1, and the outlet of the heat pipe power pump 1 is connected with the inlet of the heat pipe evaporator 3 (or 3-1,3-2, …, 3-N). Specifically, the outlet of the heat pipe power pump 1 is connected with the inlet of a throttle control valve 2 (or 2-1,2-2, …,2-N), and the outlet of the throttle control valve 2 (or 2-1,2-2, …,2-N) is connected with the inlet of a heat pipe evaporator 3 (or 3-1,3-2, …, 3-N). The heat exchange medium of the heat pipe can be circulated by a certain refrigerant working medium, such as R22, R410A, R134A or R407C, but is not limited to the listed working media.
The heat exchanger 6 can be a plate heat exchanger, a sleeve heat exchanger or a shell and tube heat exchanger, and the types using different heat exchangers all belong to the patent scope of the utility model. Specifically, the heat exchanger 6 includes two heat exchanging portions capable of exchanging heat, namely a first heat exchanging portion and a second heat exchanging portion, wherein the first heat exchanging portion is disposed in the heat pipe heat exchange medium circulation loop, and the second heat exchanging portion is disposed in the cold source circulation loop. The heat exchange medium pressurizing unit is connected with the first heat exchange part and the heat pipe evaporator 3 (or 3-1,3-2, …,3-N), and conveys the heat pipe heat exchange medium cooled by the first heat exchange part to the heat pipe evaporator 3 (or 3-1,3-2, …, 3-N). The external auxiliary cold source is connected with the second heat exchange part and sends the auxiliary cold source to the second heat exchange part, and the second heat exchange part carries out heat exchange with the heat pipe heat exchange medium in the first heat exchange part through the auxiliary cold source provided from the outside, so that the heat pipe heat exchange medium is cooled. The cooled heat pipe heat exchange medium enters the heat pipe evaporator 3 (or 3-1,3-2, …,3-N) through the heat exchange medium pressurizing unit to finish the final indoor refrigeration and cooling.
As shown in fig. 1-4, preferably, the auxiliary cold source system further includes an inlet flange 10 disposed at the cold source inlet end of the heat exchanger 6 for externally connecting an auxiliary cold source, and an outlet flange 11 disposed at the cold source outlet end of the heat exchanger 6, forming a reserved external interface. Specifically, the cold source inlet of the heat exchanger 6 is the second heat exchange part inlet of the heat exchanger 6, the cold source outlet of the heat exchanger 6 is the second heat exchange part outlet of the heat exchanger 6, and the auxiliary cold source of the auxiliary cold source system can be supplied by chilled water or cooling water, and can also be a cold source with other suitable temperature. For example, when the auxiliary cold source is cold water, the cold water enters the second heat exchange portion from the second heat exchange portion inlet of the heat exchanger 6, in the second heat exchange portion of the heat exchanger 6, the cold water cools the heat pipe heat exchange medium in the first heat exchange portion through heat exchange, and the original cold water is heated after heat exchange and flows out from the second heat exchange portion outlet of the heat exchanger 6; after the heat pipe heat exchange medium in the first heat exchange part is cooled, the heat pipe heat exchange medium enters the heat pipe evaporator 3 (or 3-1,3-2, …,3-N) through the heat exchange medium pressurizing unit, and the final indoor refrigeration cooling is completed. When the cold source inlet end of the heat exchanger 6 is not externally connected with an auxiliary cold source, the heat exchanger 6 only flows through as a heat supply pipe heat exchange medium of a circulation channel, and the heat pipe heat exchange medium is not cooled.
As shown in fig. 1 and 5, in the first and fourth embodiments of the passive heat pipe natural cooling air conditioning system of the present invention, the passive heat pipe natural cooling air conditioning system further includes a bypass branch pipe 13 connected in parallel to the heat exchanger 6. The inlet end of the bypass branch pipe 13 is connected with the outlet of the heat pipe condenser 4, and the outlet end of the bypass branch pipe 13 is connected with the inlet of the heat exchange medium pressurizing unit; a first electromagnetic valve 8-1 is arranged at the heat exchange medium inlet end of the heat exchanger 6, a one-way valve 9 is arranged at the heat exchange medium outlet end of the heat exchanger 6, and a second electromagnetic valve 8-2 is arranged on the bypass branch pipe 13.
Specifically, when the cold source inlet end of the heat exchanger 6 is not externally connected with an auxiliary cold source and is provided with the bypass branch pipe 13, the heat pipe heat exchange medium can have the following two circulation modes: firstly, heat pipe heat exchange medium passes through the bypass branch pipe 13, the heat exchanger 6 is used as a partition device at the moment, the heat pipe heat exchange medium from the heat pipe condenser 4 cannot pass through the heat exchanger 6, and the heat pipe heat exchange medium enters the heat exchange medium pressurizing unit after passing through the bypass branch pipe 13; secondly, the heat pipe heat exchange medium heater passes through the heat exchange pipe, the bypass branch pipe 13 is used as a partition device at the moment, and the heat pipe heat exchange medium from the heat pipe condenser 4 cannot pass through the bypass branch pipe 13; and the heat exchanger 6 only serves as a circulation channel for heat supply pipe heat exchange medium to flow through, the heat pipe heat exchange medium is not cooled, and the heat pipe heat exchange medium enters the heat exchange medium pressurizing unit after passing through the heat exchanger 6.
It can be understood that the passive heat pipe natural cooling air conditioning system of the present invention can be divided into a passive heat pipe evaporation side portion 100 and a passive heat pipe condensation side portion 200, as shown in fig. 1 to 4, according to the different installation positions of the devices. The passive heat pipe evaporation side portion 100 mainly includes a heat pipe evaporator 3 (or 3-1,3-2, …,3-N) and a throttle control valve 2 (or 2-1,2-2, …,2-N) at an inlet of the heat pipe evaporator 3 (or 3-1,3-2, …,3-N), forming a heat pipe evaporation end. The passive heat pipe condensation side part 200 mainly comprises a heat pipe condenser 4, a first electromagnetic valve 8-1, a second electromagnetic valve 8-2, a heat exchanger 6, an inlet flange 10, an outlet flange 11, a liquid storage tank 7, a heat pipe power pump 1 and the like. Preferably, each device of the passive heat pipe natural cooling machine room air conditioning system of the present invention in each embodiment shown in fig. 1 to 4 may be packaged according to the requirement of the dotted frame in the figure, or different devices may be selected for packaging according to the actual application, but different packaging manners all belong to the contents contained in this patent.
The utility model discloses a cold room air conditioning system of passive form heat pipe nature can include these two kinds of refrigeration modes of heat pipe mode and supplementary cold source-heat pipe mixed mode when specifically implementing, and the user can select suitable refrigeration mode according to the applied condition of difference. Wherein, the heat pipe mode is as follows: the heat pipe heat exchange medium sequentially passes through the heat pipe evaporator 3 (or 3-1,3-2, …,3-N) to absorb the heat load in the machine room, and then passes through the heat pipe condenser 4 to release the heat load of the heat pipe heat exchange medium to the outdoor, and the heat pipe heat exchange medium is converted from a gas state to a liquid state; then the heat pipe heat exchange medium sequentially passes through the first electromagnetic valve 8-1, the one-way valve 9 and the heat exchanger 6 to enter the liquid storage tank 7 of the heat exchange medium pressurizing unit (or passes through the second electromagnetic valve 8-2 and the bypass branch pipe 13 to enter the liquid storage tank 7 of the heat exchange medium pressurizing unit); finally, the heat pipe heat exchange medium is sent back to the heat pipe evaporator 3 (or 3-1,3-2, …,3-N) by the heat pipe power pump 1 of the heat exchange medium pressurizing unit, and the heat pipe refrigeration cycle is completed.
The auxiliary cold source-heat pipe mixed mode is as follows: in the heat pipe mode, starting an auxiliary cold source system; an auxiliary cold source is provided for the heat exchanger 6 through an auxiliary cold source system to supplement system cold, the temperature of a heat exchange medium of the heat pipe is further reduced through the heat exchanger 6, the auxiliary cold source absorbs heat in the heat exchanger 6, and indoor heat load is further transferred away; then the heat pipe heat exchange medium sequentially passes through a first electromagnetic valve 8-1, a one-way valve 9 and a heat exchanger 6 and enters a liquid storage tank 7 of the heat exchange medium pressurizing unit; and finally, the heat pipe heat exchange medium is sent back to the heat pipe evaporator 3 (or 3-1,3-2, …,3-N) by the heat pipe power pump 1 of the heat exchange medium pressurizing unit, so as to complete the auxiliary cold source-heat pipe mixed refrigeration.
As shown in fig. 5, the utility model discloses still constructed a passive form heat pipe natural cooling room air conditioning system's control method, can be applied to the utility model discloses in passive form heat pipe natural cooling room air conditioning system. Referring to fig. 5, the control method includes the steps of:
and S10, collecting the return air temperature Tnx (wherein x is 1,2 and 3 … … N) of each heat pipe evaporator and the first outdoor temperature Ta. The heat pipe evaporator is arranged indoors, the first outdoor temperature Ta is the outdoor environment temperature or the inlet temperature of the heat pipe condenser, and the heat pipe condenser is arranged outdoors.
S20, judging whether the first outdoor temperature Ta meets a first switching condition; the first switching condition isWherein AVG (Tnx) is the calculated average temperature,a first switching temperature difference is preset. For example, as shown in FIG. 1, Tn1 is the return air temperature (also called inlet air temperature) of heat pipe evaporator 3-1, Tn2 is the return air temperature of heat pipe evaporator 3-2, … … and so on, TnN is the return air temperature of heat pipe evaporator 3-N, and AVG (Tnx) is the return air temperature of heat pipe evaporators 3-1-3-N average return air temperature.
And S30, if the first outdoor temperature Ta meets the first switching condition, cooling in a heat pipe mode.
And S40, if the first outdoor temperature Ta does not meet the first switching condition, refrigerating by adopting an auxiliary cold source-heat pipe mixed mode.
Preferably, in step S40, after the first outdoor temperature Ta does not satisfy the first switching condition, before the cooling is performed by using the auxiliary heat source-heat pipe mixed mode, the method further includes the following steps:
s401, judging whether the first outdoor temperature Ta meets a second switching condition; the second switching condition isWherein,a second switching temperature difference is preset.
S402, if the first outdoor temperature Ta meets a second switching condition, refrigerating by adopting an auxiliary cold source-heat pipe mixed mode;
and S403, if the first outdoor temperature Ta does not meet the second switching condition, closing the heat pipe condensation fan, and refrigerating by adopting an auxiliary cold source-heat pipe mixed mode.
Preferably, in step S402, after the first outdoor temperature Ta meets the second switching condition, before the cooling is performed by using the auxiliary cold source-heat pipe mixed mode, the method further includes the following steps:
s4021, judging whether the actual maximum refrigeration demand Max (Cr) meets a third switching condition; the third switching condition is Cs less than or equal to Max (Cr), wherein the Cs is a preset switching refrigeration requirement value;
s4022, if the actual maximum refrigeration requirement Max (Cr) meets the third switching condition, refrigerating in a heat pipe mode;
s4023, if the actual maximum refrigeration requirement Max (Cr) does not meet the third switching condition, refrigerating by adopting an auxiliary cold source-heat pipe mixed mode.
Wherein, in the utility model discloses in the control method of passive heat pipe natural cooling machine room air conditioning system, the heat pipe mode is: the heat pipe heat exchange medium sequentially passes through the heat pipe evaporator 3 (or 3-1,3-2, …,3-N) to absorb the heat load in the machine room, and then passes through the heat pipe condenser 4 to release the heat load of the heat pipe heat exchange medium to the outdoor, and the heat pipe heat exchange medium is converted from a gas state to a liquid state; then the heat pipe heat exchange medium sequentially passes through the first electromagnetic valve 8-1, the one-way valve 9 and the heat exchanger 6 to enter the liquid storage tank 7 of the heat exchange medium pressurizing unit (or passes through the second electromagnetic valve 8-2 and the bypass branch pipe 13 to enter the liquid storage tank 7 of the heat exchange medium pressurizing unit); finally, the heat pipe heat exchange medium is sent to the heat pipe evaporator 3 (or 3-1,3-2, …,3-N) by the heat pipe power pump 1 of the heat exchange medium pressurizing unit, and the heat pipe refrigeration cycle is completed.
The auxiliary cold source-heat pipe mixed mode is as follows: in the heat pipe mode, starting an auxiliary cold source system; an auxiliary cold source is provided for the heat exchanger 6 through an auxiliary cold source system to supplement system cold energy, the temperature of a heat pipe heat exchange medium is further reduced through the heat exchanger 6, the auxiliary cold source absorbs heat in the heat exchanger 6 to transfer indoor heat load away, and then the heat pipe heat exchange medium sequentially passes through the first electromagnetic valve 8-1, the one-way valve 9 and the heat exchanger 6 to enter the liquid storage tank 7 of the heat exchange medium pressurizing unit; and finally, the heat pipe heat exchange medium is sent to the heat pipe evaporator 3 (or 3-1,3-2, …,3-N) by the heat pipe power pump 1 of the heat exchange medium pressurizing unit, so as to complete the auxiliary cold source-heat pipe mixed refrigeration.
It can be understood that the utility model discloses a cold room air conditioning system is cooled naturally to passive form heat pipe can also carry out refrigeration mode switching control according to each heat pipe evaporimeter's air supply temperature and outdoor ambient temperature through the air supply temperature Tsx (x ═ 1,2, 3 … …, N) of gathering outdoor ambient temperature and every heat pipe evaporimeter.
As shown in fig. 6, the utility model discloses still constructed a passive form heat pipe natural cooling room air conditioning system's control method, can be applied to the utility model discloses in passive form heat pipe natural cooling room air conditioning system. Referring to fig. 6, the control method includes the steps of:
and S100, collecting the return air temperature Tnx (wherein x is 1,2 and 3 … … N) of each heat pipe evaporator, the second outdoor temperature Ta1 after spraying and the outdoor relative humidity RH. Specifically, the heat pipe evaporator is arranged indoors, the second outdoor temperature Ta1 is the temperature of the outdoor air after being sprayed or the inlet temperature of the heat pipe condenser after being sprayed, and the heat pipe condenser is arranged outdoors.
S200, judging whether the second outdoor temperature Ta1 meets a fourth switching condition; the fourth switching condition isWherein AVG (Tnx) is the calculated average temperature,a first switching temperature difference is preset. Specifically, as shown in fig. 1, Tn1 is the return air temperature (also called as the inlet air temperature) of the heat pipe evaporator 3-1, Tn2 is the return air temperature of the heat pipe evaporator 3-2, … … is the same, TnN is the return air temperature of the heat pipe evaporator 3-N, and avg (tnx) is the average return air temperature of the heat pipe evaporators 3-1 to 3-N.
S300, if the second outdoor temperature Ta1 meets a fourth switching condition, refrigerating in a heat pipe mode;
and S400, if the second outdoor temperature Ta1 does not meet the fourth switching condition, refrigerating by adopting an auxiliary cold source-heat pipe mixed mode.
Preferably, in step S400, after the second outdoor temperature Ta1 does not satisfy the fourth switching condition, before cooling with the auxiliary cold source-heat pipe mixed mode, the method further includes the following steps:
s410, judging whether the second outdoor temperature Ta1 meets a fifth switching condition; the fifth switching condition isWherein,presetting a second switching temperature difference;
s420, if the second outdoor temperature Ta1 meets a fifth switching condition, refrigerating by adopting an auxiliary cold source-heat pipe mixed mode;
and S430, if the second outdoor temperature Ta1 does not meet the fifth switching condition, closing the heat pipe condensation fan, and refrigerating by adopting an auxiliary cold source-heat pipe mixed mode.
Preferably, in step S420, after the second outdoor temperature Ta1 meets the fifth switching condition, before cooling with the auxiliary cold source-heat pipe mixed mode, the method further includes the following steps:
s421, judging whether the actual maximum refrigeration demand Max (Cr) meets a sixth switching condition; the sixth switching condition is Cs less than or equal to Max (Cr), wherein Cs is a preset switching refrigeration requirement value;
s422, if the actual maximum refrigeration requirement Max (Cr) meets the sixth switching condition, refrigerating in a heat pipe mode;
and S423, if the actual maximum refrigeration requirement Max (Cr) does not meet the sixth switching condition, adopting an auxiliary cold source-heat pipe mixed mode for refrigeration.
Preferably, after the second outdoor temperature Ta1 does not satisfy the fourth switching condition, before step S410 is executed, the method further includes the following steps:
s500, judging whether the outdoor relative humidity RH meets a seventh switching condition; the seventh switching condition is that RH is less than or equal to A, wherein A is preset relative humidity;
and S510, if the outdoor relative humidity RH meets the seventh switching condition, starting the spraying device 12, and refrigerating in a heat pipe mode. Specifically, the spray device 12 is activated to spray the outdoor air.
S520, if the outdoor relative humidity RH does not satisfy the seventh switching condition, execute step S410.
Preferably, after the spraying device 12 is started and before the cooling in the heat pipe mode is adopted, the method further comprises the following steps:
s511, determining whether the second outdoor temperature Ta1 satisfies a fourth switching condition;
s512, if the second outdoor temperature Ta1 meets the fourth switching condition, refrigerating in a heat pipe mode;
s513, if the second outdoor temperature Ta1 does not satisfy the fourth switching condition, step S410 is executed.
Wherein, in the utility model discloses in the control method of passive heat pipe natural cooling machine room air conditioning system, the heat pipe mode is: the heat pipe heat exchange medium sequentially passes through the heat pipe evaporator 3 (or 3-1,3-2, …,3-N) to absorb the heat load in the machine room, and then passes through the heat pipe condenser 4 to release the heat load of the heat pipe heat exchange medium to the outdoor, and the heat pipe heat exchange medium is converted from a gas state to a liquid state; then the heat pipe heat exchange medium sequentially passes through the first electromagnetic valve 8-1, the one-way valve 9 and the heat exchanger 6 to enter the liquid storage tank 7 of the heat exchange medium pressurizing unit (or passes through the second electromagnetic valve 8-2 and the bypass branch pipe 13 to enter the liquid storage tank 7 of the heat exchange medium pressurizing unit); finally, the heat pipe heat exchange medium is sent to the heat pipe evaporator 3 (or 3-1,3-2, …,3-N) by the heat pipe power pump 1 of the heat exchange medium pressurizing unit, and the heat pipe refrigeration cycle is completed.
The auxiliary cold source-heat pipe mixed mode is as follows: in the heat pipe mode, starting an auxiliary cold source system; an auxiliary cold source is provided for the heat exchanger 6 through an auxiliary cold source system to supplement system cold energy, the temperature of a heat pipe heat exchange medium is further reduced through the heat exchanger 6, the auxiliary cold source absorbs heat in the heat exchanger 6 to transfer indoor heat load away, and then the heat pipe heat exchange medium sequentially passes through the first electromagnetic valve 8-1, the one-way valve 9 and the heat exchanger 6 to enter the liquid storage tank 7 of the heat exchange medium pressurizing unit; and finally, the heat pipe heat exchange medium is sent to the heat pipe evaporator 3 (or 3-1,3-2, …,3-N) by the heat pipe power pump 1 of the heat exchange medium pressurizing unit, so as to complete the auxiliary cold source-heat pipe mixed refrigeration.
It can be understood that the utility model discloses a cold room air conditioning system is cooled naturally to passive form heat pipe can also carry out refrigeration mode switching control according to each heat pipe evaporimeter's air supply temperature and outdoor ambient temperature through the air supply temperature Tsx (x ═ 1,2, 3 … …, N) of gathering outdoor ambient temperature and every heat pipe evaporimeter.
It is to be understood that the foregoing examples merely represent preferred embodiments of the present invention, and that the description thereof is more specific and detailed, but not intended to limit the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several modifications 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, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (9)
1. A passive heat pipe natural cooling machine room air conditioning system is characterized by comprising a passive heat pipe circulating system and an auxiliary cold source system;
the passive heat pipe circulation system comprises at least one heat pipe evaporator (3,3-1,3-2, …,3-N) arranged indoors, a heat pipe condenser (4) connected with the heat pipe evaporator (3,3-1,3-2, …,3-N) and used for cooling a heat pipe heat exchange medium, and a heat exchange medium pressurizing unit connected with the heat pipe evaporator (3,3-1,3-2, …,3-N) and the heat pipe condenser (4) and used for conveying the heat pipe heat exchange medium cooled by the heat pipe condenser (4) to the heat pipe evaporator (3,3-1,3-2, …, 3-N);
the auxiliary cold source system comprises a heat exchanger (6) which is arranged outdoors and can be used for heat exchange between a heat pipe heat exchange medium and an auxiliary cold source, and the heat exchanger (6) comprises a cold source inlet end and a cold source outlet end which are connected with the auxiliary cold source; the inlet end of a heat exchange medium of the heat exchanger (6) is connected with the outlet of the heat pipe condenser (4), and the outlet end of the heat exchange medium of the heat exchanger (6) is connected with the inlet of the heat exchange medium pressurizing unit.
2. The passive heat pipe natural cooling unit air conditioning system according to claim 1, wherein the heat exchange medium pressurizing unit comprises a liquid storage tank (7) for storing heat pipe heat exchange medium and a heat pipe power pump (1) for pressurizing the heat pipe heat exchange medium; the inlet of the liquid storage tank (7) is connected with the outlet of the heat pipe condenser (4), the outlet of the liquid storage tank (7) is connected with the inlet of the heat pipe power pump (1), and the outlet of the heat pipe power pump (1) is connected with the inlet of the heat pipe evaporator (3,3-1,3-2, …, 3-N).
3. The passive heat pipe natural cooling air conditioning system according to claim 2, wherein a throttle control valve (2,2-1,2-2, …,2-N) is arranged at an inlet of the heat pipe evaporator (3,3-1,3-2, …,3-N), an outlet of the heat pipe power pump (1) is connected with an inlet of the throttle control valve (2,2-1,2-2, …,2-N), and an outlet of the throttle control valve (2,2-1,2-2, …,2-N) is connected with an inlet of the heat pipe evaporator (3,3-1,3-2, …, 3-N).
4. The passive heat pipe natural cooling unit air conditioning system according to claim 1, wherein the auxiliary cold source system further comprises a cold source inlet end arranged on the heat exchanger (6), an inlet flange (10) for externally connecting an auxiliary cold source, and an outlet flange (11) arranged on the cold source outlet end of the heat exchanger (6).
5. The passive heat pipe natural cooling unit air conditioning system according to claim 1, further comprising a bypass branch pipe (13) connected in parallel with the heat exchanger (6), wherein an inlet end of the bypass branch pipe (13) is connected with an outlet of the heat pipe condenser (4), and an outlet end of the bypass branch pipe (13) is connected with an inlet of the heat exchange medium pressurizing unit;
a first electromagnetic valve (8-1) is arranged at the heat exchange medium inlet end of the heat exchanger (6), a one-way valve (9) is arranged at the heat exchange medium outlet end of the heat exchanger (6), and a second electromagnetic valve (8-2) is arranged on the bypass branch pipe (13).
6. The passive heat pipe natural cooling refrigeration room air conditioning system according to claim 1, wherein the heat pipe evaporator (3,3-1,3-2, …,3-N) is an air-cooled heat pipe evaporator, and the heat pipe condenser (4) is an air-cooled heat pipe condenser; the passive heat pipe circulating system also comprises a heat pipe evaporation fan for supplying air to the heat pipe evaporator (3,3-1,3-2, …,3-N) and a heat pipe condensation fan for supplying air to the heat pipe condenser (4).
7. The passive heat pipe natural cooling air conditioning system according to claim 1, wherein the passive heat pipe circulation system comprises a plurality of heat pipe evaporators (3,3-1,3-2, …,3-N) connected in parallel, and a throttle control valve (2,2-1,2-2, …,2-N) is provided at an inlet of each of the heat pipe evaporators (3,3-1,3-2, …, 3-N).
8. The passive heat pipe natural cooling unit air conditioning system according to claim 1, wherein the heat exchanger (6) comprises a first heat exchanging portion disposed in the heat pipe heat exchange medium circulation loop and a second heat exchanging portion disposed in the cold source circulation loop; the heat exchange medium pressurizing unit is connected with the first heat exchange part and the heat pipe evaporator (3,3-1,3-2, …,3-N), and conveys the heat pipe heat exchange medium cooled by the first heat exchange part to the heat pipe evaporator (3,3-1,3-2, …, 3-N); the second heat exchange part is connected with an auxiliary cold source and exchanges heat with the heat pipe heat exchange medium in the first heat exchange part through the auxiliary cold source.
9. The passive heat pipe natural cooling machine room air conditioning system according to any one of claims 1-8, wherein the passive heat pipe circulation system further comprises a spraying device (12) for spraying and cooling outdoor air.
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| CN201820431007.2U CN208063652U (en) | 2018-03-28 | 2018-03-28 | The naturally cold computer-room air conditioning system of passive type heat pipe |
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| CN201820431007.2U CN208063652U (en) | 2018-03-28 | 2018-03-28 | The naturally cold computer-room air conditioning system of passive type heat pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109511246A (en) * | 2018-12-21 | 2019-03-22 | 北京中热信息科技有限公司 | A kind of heat pipe air conditioner formula indirect evaporation cooling system |
| CN112178838A (en) * | 2020-08-27 | 2021-01-05 | 珠海格力电器股份有限公司 | Natural cooling system, control method and machine room |
-
2018
- 2018-03-28 CN CN201820431007.2U patent/CN208063652U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109511246A (en) * | 2018-12-21 | 2019-03-22 | 北京中热信息科技有限公司 | A kind of heat pipe air conditioner formula indirect evaporation cooling system |
| CN112178838A (en) * | 2020-08-27 | 2021-01-05 | 珠海格力电器股份有限公司 | Natural cooling system, control method and machine room |
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