CN105352211A - Direct-expansion type energy-saving air-conditioning system of machine room and control method thereof - Google Patents
Direct-expansion type energy-saving air-conditioning system of machine room and control method thereof Download PDFInfo
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- CN105352211A CN105352211A CN201510844368.0A CN201510844368A CN105352211A CN 105352211 A CN105352211 A CN 105352211A CN 201510844368 A CN201510844368 A CN 201510844368A CN 105352211 A CN105352211 A CN 105352211A
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Abstract
The invention provides a direct-expansion type energy-saving air-conditioning system of a machine room. The system comprises a compressor, a first throttle valve, a liquid storing tank, a second throttle valve, an evaporator, an air storing tank, a sensor, a controller, a first valve, a second valve, a third valve, a temperature detector, a liquid level sensing device and a condenser, wherein the compressor, the first throttle valve, the liquid storing tank, the second throttle valve, the evaporator, the air storing tank, the sensor, the controller, the first valve, the second valve, the third valve, the temperature detector and the liquid level sensing device are arranged in the machine room; the condenser is arranged at the outside of the machine room; the evaporator is positioned in a corresponding server cabinet; the compressor, the condenser, the first throttle valve, the first valve, the liquid storing tank, the second valve, the second throttle valve, the evaporator, the air storing tank and the third valve are sequentially connected in an end-to-end manner; the temperature detector is arranged in the corresponding server cabinet; the liquid level sensing device is arranged in the liquid storing tank; the temperature detector and the liquid level sensing device are connected to the sensor; the controller is correspondingly connected to the compressor, the first valve, the second valve, the third valve and the sensor. The invention further provides a control method of the direct-expansion type energy-saving air-conditioning system of the machine room. With the adoption of the system and the method, the problem of heat removal of the machine room can be solved; the energy consumption can be reduced, and the cost can be decreased.
Description
Technical field
The present invention relates to a kind of machinery room energy-saving air conditioner field, particularly a kind of direct-expansion-type machinery room energy-saving air conditioner system and control method thereof.
Background technology
Along with the fast development of network technology, quantity and the energy consumption of data center module and communication base station grow with each passing day.Current existing air conditioner in machine room is commonly direct-expansion-type air conditioner in machine room, direct-expansion-type air conditioner in machine room refers to the air-conditioning be delivered to from room draw heat by condenser outdoor air, it is the temperature that employing comfort air conditioning system runs in controlling chamber continuously, conventional way is under fan action, pass through space under floor, blow a cold wind over bottom server cabinet, the heat in takeaway service device rack body.Although this temperature control mode can meet the requirement of controlling machine room temperature, cause some problems:
1) air conditioner in machine room employing vapour compression refrigeration mode runs the temperature in controlling chamber continuously, and its power consumption is comparatively large, causes operating cost higher;
2) the many all-air systems of air conditioner in machine room, the air supply duct of blower fan is connected to bottom server cabinet through floor, and air-supply upwards washes away server cabinet, and the amorphous introducing unit of blower fan of the return air formed after taking away heat cooled unit again forms circulation; In this manner, refrigeration unit and server cabinet cannot effectively be split, and cause noise very large; The mode of this lower air-supply simultaneously proposes higher requirement to the floor height of building;
3), in the load that conventional air conditioner in machine room is born, not only comprise the machine utilizations such as server cabinet, also carry the load of machine room architectural exterior-protecting construction; For reducing the load of machine room architectural exterior-protecting construction, the insulation of architectural exterior-protecting construction and closure are had higher requirement.
Current existing machine room air-conditioning energy-saving technology mainly utilize at conditioning in Transition Season or winter, outside air temperature was cooler time, utilize the cold of outdoor new wind to eliminate the heat of machine room.Chinese patent CN200820123459.0, CN200910088535.8, CN201010221372.9 all adopt hot pipe technique, utilize the cold of outdoor new wind to eliminate the heat of machine room.Although these measures solve the normal work problem of air-conditioning equipment, be restricted in the application scenario of some totally-enclosed machine rooms.
Summary of the invention
One of the technical problem to be solved in the present invention, be to provide a kind of direct-expansion-type machinery room energy-saving air conditioner system, utilize the principle of direct-expansion-type heat pump, evaporimeter is directly placed in corresponding server cabinet, sensor is according to the liquid level change in the change of server machine in-cabinet temperature and liquid level induction system induction fluid reservoir, match with controller, select " compressor cooling circulation pattern ", " uncompressed mechanism cold circulation pattern " and " half compressor cooling circulation pattern ", effectively can reduce air conditioner load, solve the heat removal issue of machine room, and greatly reduce compressor operating time, reduce energy consumption.
One of problem of the technology that the present invention will solve, is achieved in that
A kind of direct-expansion-type machinery room energy-saving air conditioner system, the condenser that described machinery room energy-saving air conditioner system comprises the compressor be arranged in machine room, first throttle valve, fluid reservoir, second throttle, evaporimeter, air accumulator, sensor, controller, the first valve, the second valve, the 3rd valve, temperature-sensing probe and liquid level induction system and is arranged at outside machine room, described evaporimeter is placed in corresponding server cabinet;
The air inlet pipe of described compressor is connected with one end of described 3rd valve, and the blast pipe of described compressor is connected with the import of described condenser; One end of described first throttle valve is connected with the outlet of described condenser, and the other end of described first throttle valve is connected with one end of described first valve; The import of described fluid reservoir is connected with the other end of described first valve, and the outlet of described fluid reservoir is connected with one end of described second valve; One end of described second throttle is connected with the other end of the second valve, and the other end of described second throttle is connected with the import of described evaporimeter; The outlet of described evaporimeter is connected with the import of described air accumulator; The outlet of described air accumulator is connected with the other end of described 3rd valve; Described temperature-sensing probe is located in described server cabinet, and described liquid level induction system is located in described fluid reservoir, and described temperature-sensing probe and described liquid level induction system are all connected to described sensor; Described controller is connected with described compressor, described first valve, described second valve, described 3rd valve and described sensor respectively.
Further, described first valve, described second valve and described 3rd valve are magnetic valve.
The technical problem to be solved in the present invention two, be the control method that a kind of direct-expansion-type machinery room energy-saving air conditioner is provided, utilize the principle of direct-expansion-type heat pump, evaporimeter is directly placed in corresponding server cabinet, sensor is according to the liquid level change in the change of server machine in-cabinet temperature and liquid level induction system induction fluid reservoir, match with controller, select " compressor cooling circulation pattern ", " uncompressed mechanism cold circulation pattern " and " half compressor cooling circulation pattern ", effectively can solve the heat removal issue of machine room, and greatly reduce compressor operating time, reduce energy consumption.
Problem two of the present invention, is achieved in that
A control method for direct-expansion-type machinery room energy-saving air conditioner, described method needs to provide above-mentioned a kind of direct-expansion-type machinery room energy-saving air conditioner system, and described method specifically comprises the steps:
Step 10, the temperature T set in described server cabinet
inboundary value T
o; Set the liquid level V in described fluid reservoir
inboundary value V
l1with threshold value V
l2; Set three kinds of kind of refrigeration cycle patterns of described machinery room energy-saving air conditioner system, i.e. compressor cooling circulation pattern, uncompressed mechanism cold circulation pattern and half compressor cooling circulation pattern;
Step 20, described sensor detect the temperature T in described server cabinet continuously
inand the liquid level V in described fluid reservoir
in, work as T
in> T
otime, enter described compressor cooling circulation pattern, described controller one signal instruction given by described sensor, described compressor opened by described controller, described first valve, described second valve and described 3rd valve, the refrigerant vapour of the low-temp low-pressure in described air accumulator drawn by described compressor, after being compressed into the refrigerant vapour of HTHP, after the described condenser heat radiation outside machine room is condensed into high-temperature high-pressure refrigerant liquid, after the throttling of described first throttle valve is the refrigerant liquid of low-temp low-pressure, enter described fluid reservoir, again after described second throttle throttling, the refrigerant liquid of low-temp low-pressure enters the refrigerant vapour that the heat absorption of described evaporimeter is vaporized into low-temp low-pressure, enter described air accumulator, sucked by described compressor again, iterative cycles, now, the temperature T in described server cabinet
incontinuous decline, along with the temperature in described server cabinet declines, the amount of evaporating for described server cabinet in the refrigerant liquid in described fluid reservoir is fewer, and the amount be stored in described reservoir is more, makes the liquid level V in described fluid reservoir
incontinuous rising, until described sensor detects the temperature T in described server cabinet
in≤ T
oand the liquid level V in described fluid reservoir
inmeet scope V
l1< V
in< V
l2time, enter step 30,
Step 30, enter described uncompressed mechanism cold circulation pattern, described controller one signal instruction given by described sensor, described controller cuts out described compressor, described first valve and described 3rd valve, open described second valve, the refrigerant liquid of the low-temp low-pressure in described fluid reservoir is after described second throttle throttling, enter the refrigerant vapour that the heat absorption of described evaporimeter is vaporized into low-temp low-pressure, enter described air accumulator, iterative cycles; Now, the temperature T in described server cabinet
incontinuous rising, along with the temperature in described server cabinet rises, the amount of evaporating for described server cabinet in the refrigerant liquid in described fluid reservoir is more, and the amount be stored in described reservoir is fewer, makes the liquid level V in described fluid reservoir
incontinuous decline, when described sensor detects the temperature T in described server cabinet
in≤ T
oand the liquid level V in described fluid reservoir
inmeet scope 0 < V
in≤ V
l1time, enter step 40; Otherwise, enter step 20;
Step 40, enter described half compressor cooling circulation pattern, described controller one signal instruction given by described sensor, described compressor opened by described controller, described first valve, described 3rd valve, turn described second valve opening down, the refrigerant vapour of the low-temp low-pressure in described air accumulator drawn by described compressor, after being compressed into the refrigerant vapour of HTHP, after the described condenser heat radiation outside machine room is condensed into high-temperature high-pressure refrigerant liquid, after the throttling of described first throttle valve is the refrigerant liquid of low-temp low-pressure, enter described fluid reservoir, wherein the refrigerant liquid of a part of low-temp low-pressure stays described fluid reservoir, the refrigerant liquid of another part low-temp low-pressure is again after described second throttle throttling, the refrigerant liquid of this part low-temp low-pressure enters the refrigerant vapour that the heat absorption of described evaporimeter is vaporized into low-temp low-pressure, enter described air accumulator, refrigerant vapour in described air accumulator is sucked by described compressor again, iterative cycles, now, the temperature T in described server cabinet
incontinuous decline, along with the temperature in described server cabinet declines, the amount of evaporating for described server cabinet in the refrigerant liquid in described fluid reservoir is fewer, and the amount be stored in described reservoir is more, makes the liquid level V in described fluid reservoir
incontinuous rising, when described sensor detects the temperature T in described server cabinet
in≤ T
oand liquid level V in described fluid reservoir
inmeet scope V
in=V
l2time, enter step 30, otherwise, enter step 20.
Further, the control mode of described first valve, described second valve and described 3rd valve is electronic or hydraulic drive.
Tool of the present invention has the following advantages:
1, a kind of direct-expansion-type machinery room energy-saving air conditioner system of the present invention and control method thereof reliably, decrease compressor operating time, can ensure that air conditioner in machine room works normally and efficiently;
2, simple to operate, change according to liquid level in fluid reservoir, and the setting of operating condition, realize switching corresponding pipe-line system by the switch of control valve;
3, installation is simple, and after installation and debugging, operating cost is low;
4, control mode of the present invention can Non-follow control, and can automatically control again, applicability is strong;
5, evaporimeter is directly placed in corresponding server cabinet by the present invention, and its load only comprises the load of server cabinet, reduces the strict demand for machine room architectural exterior-protecting construction;
6, the property of the present invention is directed to is strong, and air-conditioning service object is directed to server cabinet.
Accompanying drawing explanation
The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the structural representation of a kind of direct-expansion-type machinery room energy-saving air conditioner of the present invention system.
Fig. 2 is the flowchart of the control method of a kind of direct-expansion-type machinery room energy-saving air conditioner of the present invention.
In figure: 1-compressor, 2-condenser, 3-first throttle valve, 4-fluid reservoir, 5-second throttle, 6-evaporimeter, 7-air accumulator, 8-sensor, 9-controller, 10-first valve, 11-second valve, 12-the 3rd valve, 13-temperature-sensing probe, 14-liquid level induction system, 15-server cabinet.
Detailed description of the invention
Refer to shown in Fig. 1 and Fig. 2, a kind of direct-expansion-type machinery room energy-saving air conditioner system of the present invention, the condenser 2 that described machinery room energy-saving air conditioner system comprises the compressor 1 be arranged in machine room, first throttle valve 3, fluid reservoir 4, second throttle 5, evaporimeter 6, air accumulator 7, sensor 8, controller 9, first valve 10, second valve 11, the 3rd valve 12, temperature-sensing probe 13 and liquid level induction system 14 and is arranged at outside machine room, described evaporimeter 6 is placed in corresponding server cabinet 15;
The air inlet pipe of described compressor 1 is connected with one end of described 3rd valve 12, and the blast pipe of described compressor 1 is connected with the import of described condenser 2; One end of described first throttle valve 3 is connected with the outlet of described condenser 2, and the other end of described first throttle valve 3 is connected with one end of described first valve 10; The import of described fluid reservoir 4 is connected with the other end of described first valve 10, and the outlet of described fluid reservoir 4 is connected with one end of described second valve 11; One end of described second throttle 5 is connected with the other end of the second valve 10, and the other end of described second throttle 5 is connected with the import of described evaporimeter 6; The outlet of described evaporimeter 6 is connected with the import of described air accumulator 7; The outlet of described air accumulator 7 is connected with the other end of described 3rd valve 12; Described temperature-sensing probe 13 is located in described server cabinet 15, and described liquid level induction system 14 is located in described fluid reservoir 4, and described temperature-sensing probe 13 and described liquid level induction system 14 are all connected to described sensor 8; Described controller 9 is connected with described first valve 10, described second valve 11, described 3rd valve 12 and described sensor 8 respectively.
Further, described first valve 10, described second valve 11 and described 3rd valve 12 are magnetic valve.
The control method of a kind of direct-expansion-type machinery room energy-saving air conditioner of the present invention, described method needs to provide above-mentioned a kind of direct-expansion-type machinery room energy-saving air conditioner system, and described method specifically comprises the steps:
Step 10, the temperature boundary value T set in described server cabinet 15
o; Set the liquid level V in described fluid reservoir 4
inboundary value V
l1with threshold value V
l2; Set three kinds of kind of refrigeration cycle patterns of described machinery room energy-saving air conditioner system, i.e. compressor cooling circulation pattern, uncompressed mechanism cold circulation pattern and half compressor cooling circulation pattern;
Step 20, described sensor 8 detect the temperature T in described server cabinet 15 continuously
inand the liquid level V in described fluid reservoir 4
in, work as T
in> T
otime, enter described compressor cooling circulation pattern, described controller 9 one signal instruction given by described sensor 8, described compressor 1 opened by described controller 9, described first valve 10, described second valve 11 and described 3rd valve 12, the refrigerant vapour of the low-temp low-pressure in described air accumulator 7 drawn by described compressor 1, after being compressed into the refrigerant vapour of HTHP, after described condenser 2 heat radiation outside machine room is condensed into high-temperature high-pressure refrigerant liquid, after the throttling of described first throttle valve 3 is the refrigerant liquid of low-temp low-pressure, enter described fluid reservoir 4, again after the throttling of described second throttle 5, the refrigerant liquid of low-temp low-pressure enters the refrigerant vapour that the heat absorption of described evaporimeter 6 is vaporized into low-temp low-pressure, enter described air accumulator 7, sucked by described compressor 1 again, iterative cycles, now, the temperature T in described server cabinet 15
incontinuous decline, along with the temperature in described server cabinet 15 declines, amount for described server cabinet 15 evaporation in refrigerant liquid in described fluid reservoir 4 is fewer, and the amount be stored in described reservoir 4 is more, makes the liquid level V in described fluid reservoir 4
incontinuous rising, until described sensor 8 detects the temperature T in described server cabinet 15
in≤ T
oand the liquid level V in described fluid reservoir 4
inmeet scope V
l1< V
in< V
l2time, enter step 30,
Step 30, enter described uncompressed mechanism cold circulation pattern, described controller 9 one signal instruction given by described sensor 8, described controller 9 cuts out described compressor 1, described first valve 10 and described 3rd valve 12, open described second valve 11, the refrigerant liquid of the low-temp low-pressure in described fluid reservoir 4 is after the throttling of described second throttle 5, enter the refrigerant vapour that the heat absorption of described evaporimeter 6 is vaporized into low-temp low-pressure, enter described air accumulator 7, iterative cycles; Now, the temperature T in described server cabinet 15
incontinuous rising, along with the temperature in described server cabinet 15 rises, amount for described server cabinet 15 evaporation in refrigerant liquid in described fluid reservoir 4 is more, and the amount be stored in described reservoir 4 is fewer, makes the liquid level V in described fluid reservoir 4
incontinuous decline, when described sensor 8 detects the temperature T in described server cabinet 15
in≤ T
oand the liquid level V in described fluid reservoir 4
inmeet scope 0 < V
in≤ V
l1time, enter step 40; Otherwise, enter step 20;
Step 40, enter described half compressor cooling circulation pattern, described controller 9 one signal instruction given by described sensor 8, described compressor 1 opened by described controller 9, described first valve 10, described 3rd valve 12, turn described second valve 11 aperture down, the refrigerant vapour of the low-temp low-pressure in described air accumulator 7 drawn by described compressor 1, after being compressed into the refrigerant vapour of HTHP, after described condenser 2 heat radiation outside machine room is condensed into high-temperature high-pressure refrigerant liquid, after the throttling of described first throttle valve 3 is the refrigerant liquid of low-temp low-pressure, enter described fluid reservoir 4, wherein the refrigerant liquid of a part of low-temp low-pressure stays described fluid reservoir 4, the refrigerant liquid of another part low-temp low-pressure is again after the throttling of described second throttle 5, the refrigerant liquid of this part low-temp low-pressure enters the refrigerant vapour that the heat absorption of described evaporimeter 6 is vaporized into low-temp low-pressure, enter described air accumulator 7, refrigerant vapour in described air accumulator 7 is sucked by described compressor 1 again, iterative cycles, now, the temperature T in described server cabinet 15
incontinuous decline, along with the temperature in described server cabinet 15 declines, amount for described server cabinet 15 evaporation in refrigerant liquid in described fluid reservoir 4 is fewer, and the amount be stored in described reservoir 4 is more, makes the liquid level V in described fluid reservoir 4
incontinuous rising, when described sensor 8 detects the temperature T in described server cabinet 15
in≤ T
oand liquid level V in described fluid reservoir 4
inmeet scope V
in=V
l2time, enter step 30, otherwise, enter step 20.
Further, the control mode of described first valve 10, described second valve 11 and described 3rd valve 12 is electronic or hydraulic drive.
Be described in further detail below in conjunction with the control method of embodiment to a kind of direct-expansion-type machinery room energy-saving air conditioner of the present invention.
With the machinery room energy-saving air conditioner of refrigerating capacity 2000kW for instantiation, cold-producing medium adopts R134a.
Described method needs to provide above-mentioned a kind of direct-expansion-type machinery room energy-saving air conditioner system, and described method specifically comprises the steps:
Step S1, the temperature boundary value T set in described server cabinet 15
oit is 26 DEG C; Set the liquid level V in described fluid reservoir 4
inboundary value V
l1for 0.2L and threshold value V
l2for 0.9L (maximum volume of described fluid reservoir 4 is 0.9L); Set three kinds of kind of refrigeration cycle patterns of described machinery room energy-saving air conditioner system, i.e. compressor cooling circulation pattern, uncompressed mechanism cold circulation pattern and half compressor cooling circulation pattern;
Step S2, described sensor 8 detect the temperature T in described server cabinet 15 continuously
inand the liquid level V in described fluid reservoir 4
in, work as T
induring > 26 DEG C, enter described compressor cooling circulation pattern, described controller 9 one signal instruction given by described sensor 8, described compressor 1 opened by described controller 9, described first valve 10, described second valve 11 and described 3rd valve 12, the refrigerant vapour of the low-temp low-pressure in described air accumulator 7 drawn by described compressor 1, after being compressed into the refrigerant vapour of HTHP, after described condenser 2 heat radiation outside machine room is condensed into high-temperature high-pressure refrigerant liquid, after the throttling of described first throttle valve 3 is the refrigerant liquid of low-temp low-pressure, enter described fluid reservoir 4, again after the throttling of described second throttle 5, the refrigerant liquid of low-temp low-pressure enters the refrigerant vapour that the heat absorption of described evaporimeter 6 is vaporized into low-temp low-pressure, enter described air accumulator 7, sucked by described compressor 1 again, iterative cycles, now, the temperature T in described server cabinet 15
incontinuous decline, along with the temperature in described server cabinet 15 declines, amount for described server cabinet 15 evaporation in refrigerant liquid in described fluid reservoir 4 is fewer, and the amount be stored in described reservoir 4 is more, makes the liquid level V in described fluid reservoir 4
incontinuous rising, until described sensor 8 detects the temperature T in described server cabinet 15
in≤ 26 DEG C and liquid level V in described fluid reservoir 4
inmeet scope 0.2L < V
induring < 0.9L, enter step S3,
Step S3, enter described uncompressed mechanism cold circulation pattern, described controller 9 one signal instruction given by described sensor 8, described controller 9 cuts out described compressor 1, described first valve 10 and described 3rd valve 12, open described second valve 11, the refrigerant liquid of the low-temp low-pressure in described fluid reservoir 4 is after the throttling of described second throttle 5, enter the refrigerant vapour that the heat absorption of described evaporimeter 6 is vaporized into low-temp low-pressure, enter described air accumulator 7, iterative cycles; Now, the temperature T in described server cabinet 15
incontinuous rising, along with the temperature in described server cabinet 15 rises, amount for described server cabinet 15 evaporation in refrigerant liquid in described fluid reservoir 4 is more, and the amount be stored in described reservoir 4 is fewer, makes the liquid level V in described fluid reservoir 4
incontinuous decline, when described sensor 8 detects the temperature T in described server cabinet 15
in≤ 26 DEG C and liquid level V in described fluid reservoir 4
inmeet scope 0 < V
induring≤0.2L, enter step S4; Otherwise enter step S2;
Step S4, enter described half compressor cooling circulation pattern, described controller 9 one signal instruction given by described sensor 8, described controller 9 opens described compressor 1, described first valve 10, described 3rd valve 12, (degree turned down is relevant with the temperature in described server cabinet 15 to turn described second valve 11 aperture down, temperature is lower, what regulate is less, it is tighter that described second valve 11 is closed, the amount that described fluid reservoir 4 inner refrigerant liquid stays is more, and the amount entering described evaporimeter 6 is fewer, temperature is higher, what regulate is larger, it is less that described second valve 11 is closed, the amount that described fluid reservoir 4 inner refrigerant liquid stays is fewer, the amount entering described evaporimeter 6 is more), the refrigerant vapour of the low-temp low-pressure in described air accumulator 7 drawn by described compressor 1, after being compressed into the refrigerant vapour of HTHP, after described condenser 2 heat radiation outside machine room is condensed into high-temperature high-pressure refrigerant liquid, after the throttling of described first throttle valve 3 is the refrigerant liquid of low-temp low-pressure, enter described fluid reservoir 4, wherein the refrigerant liquid of a part of low-temp low-pressure stays described fluid reservoir 4, the refrigerant liquid of another part low-temp low-pressure is again after the throttling of described second throttle 5, the refrigerant liquid of this part low-temp low-pressure enters the refrigerant vapour that the heat absorption of described evaporimeter 6 is vaporized into low-temp low-pressure, enter described air accumulator 7, refrigerant vapour in described air accumulator 7 is sucked by described compressor 1 again, iterative cycles, now, the temperature T in described server cabinet 15
incontinuous decline, along with the temperature in described server cabinet 15 declines, amount for described server cabinet 15 evaporation in refrigerant liquid in described fluid reservoir 4 is fewer, and the amount be stored in described reservoir 4 is more, makes the liquid level V in described fluid reservoir 4
incontinuous rising, when described sensor 8 detects the temperature T in described server cabinet 15
in≤ T
oand liquid level V in described fluid reservoir 4
inmeet scope V
in=V
l2time, enter step S3, otherwise, enter step S2.
Further, the control mode of described first valve 10, described second valve 11 and described 3rd valve 12 is electronic or hydraulic drive.
Described compressor cooling circulation pattern, described uncompressed mechanism cold circulation pattern and described half compressor cooling circulation pattern are that direct-expansion-type feed flow freezes, highly pressurised liquid freezes directly to described evaporimeter 6 feed flow, heat absorption is direct after vaporizing to be sucked by described compressor 1, thus the temperature reduced in described server cabinet 15, cold air in described server cabinet 15 is passed in machine room, thus produces refrigeration in machine room.
Although the foregoing describe the specific embodiment of the present invention; but be familiar with those skilled in the art to be to be understood that; specific embodiment described by us is illustrative; instead of for the restriction to scope of the present invention; those of ordinary skill in the art, in the modification of the equivalence done according to spirit of the present invention and change, should be encompassed in scope that claim of the present invention protects.
Claims (4)
1. a direct-expansion-type machinery room energy-saving air conditioner system, it is characterized in that: the condenser that described machinery room energy-saving air conditioner system comprises the compressor be arranged in machine room, first throttle valve, fluid reservoir, second throttle, evaporimeter, air accumulator, sensor, controller, the first valve, the second valve, the 3rd valve, temperature-sensing probe and liquid level induction system and is arranged at outside machine room, described evaporimeter is placed in corresponding server cabinet;
The air inlet pipe of described compressor is connected with one end of described 3rd valve, and the blast pipe of described compressor is connected with the import of described condenser; One end of described first throttle valve is connected with the outlet of described condenser, and the other end of described first throttle valve is connected with one end of described first valve; The import of described fluid reservoir is connected with the other end of described first valve, and the outlet of described fluid reservoir is connected with one end of described second valve; One end of described second throttle is connected with the other end of the second valve, and the other end of described second throttle is connected with the import of described evaporimeter; The outlet of described evaporimeter is connected with the import of described air accumulator; The outlet of described air accumulator is connected with the other end of described 3rd valve; Described temperature-sensing probe is located in described server cabinet, and described liquid level induction system is located in described fluid reservoir, and described temperature-sensing probe and described liquid level induction system are all connected to described sensor; Described controller is connected with described compressor, described first valve, described second valve, described 3rd valve and described sensor respectively.
2. a kind of direct-expansion-type machinery room energy-saving air conditioner system according to claim 1, is characterized in that: described first valve, described second valve and described 3rd valve are magnetic valve.
3. a control method for direct-expansion-type machinery room energy-saving air conditioner, described method needs to provide a kind of direct-expansion-type machinery room energy-saving air conditioner system as claimed in claim 1, it is characterized in that: described method specifically comprises the steps:
Step 10, the temperature T set in described server cabinet
inboundary value T
o; Set the liquid level V in described fluid reservoir
inboundary value V
l1with threshold value V
l2; Set three kinds of kind of refrigeration cycle patterns of described machinery room energy-saving air conditioner system, i.e. compressor cooling circulation pattern, uncompressed mechanism cold circulation pattern and half compressor cooling circulation pattern;
Step 20, described sensor detect the temperature T in described server cabinet continuously
inand the liquid level V in described fluid reservoir
in, work as T
in> T
otime, enter described compressor cooling circulation pattern, described controller one signal instruction given by described sensor, described compressor opened by described controller, described first valve, described second valve and described 3rd valve, the refrigerant vapour of the low-temp low-pressure in described air accumulator drawn by described compressor, after being compressed into the refrigerant vapour of HTHP, after the described condenser heat radiation outside machine room is condensed into high-temperature high-pressure refrigerant liquid, after the throttling of described first throttle valve is the refrigerant liquid of low-temp low-pressure, enter described fluid reservoir, again after described second throttle throttling, the refrigerant liquid of low-temp low-pressure enters the refrigerant vapour that the heat absorption of described evaporimeter is vaporized into low-temp low-pressure, enter described air accumulator, sucked by described compressor again, iterative cycles, now, the temperature T in described server cabinet
incontinuous decline, along with the temperature in described server cabinet declines, the amount of evaporating for described server cabinet in the refrigerant liquid in described fluid reservoir is fewer, and the amount be stored in described reservoir is more, makes the liquid level V in described fluid reservoir
incontinuous rising, until described sensor detects the temperature T in described server cabinet
in≤ T
oand the liquid level V in described fluid reservoir
inmeet scope V
l1< V
in< V
l2time, enter step 30,
Step 30, enter described uncompressed mechanism cold circulation pattern, described controller one signal instruction given by described sensor, described controller cuts out described compressor, described first valve and described 3rd valve, open described second valve, the refrigerant liquid of the low-temp low-pressure in described fluid reservoir is after described second throttle throttling, enter the refrigerant vapour that the heat absorption of described evaporimeter is vaporized into low-temp low-pressure, enter described air accumulator, iterative cycles; Now, the temperature T in described server cabinet
incontinuous rising, along with the temperature in described server cabinet rises, the amount of evaporating for described server cabinet in the refrigerant liquid in described fluid reservoir is more, and the amount be stored in described reservoir is fewer, makes the liquid level V in described fluid reservoir
incontinuous decline, when described sensor detects the temperature T in described server cabinet
in≤ T
oand the liquid level V in described fluid reservoir
inmeet scope 0 < V
in≤ V
l1time, enter step 40; Otherwise, enter step 20;
Step 40, enter described half compressor cooling circulation pattern, described controller one signal instruction given by described sensor, described compressor opened by described controller, described first valve, described 3rd valve, turn described second valve opening down, the refrigerant vapour of the low-temp low-pressure in described air accumulator drawn by described compressor, after being compressed into the refrigerant vapour of HTHP, after the described condenser heat radiation outside machine room is condensed into high-temperature high-pressure refrigerant liquid, after the throttling of described first throttle valve is the refrigerant liquid of low-temp low-pressure, enter described fluid reservoir, wherein the refrigerant liquid of a part of low-temp low-pressure stays described fluid reservoir, the refrigerant liquid of another part low-temp low-pressure is again after described second throttle throttling, the refrigerant liquid of this part low-temp low-pressure enters the refrigerant vapour that the heat absorption of described evaporimeter is vaporized into low-temp low-pressure, enter described air accumulator, refrigerant vapour in described air accumulator is sucked by described compressor again, iterative cycles, now, the temperature T in described server cabinet
incontinuous decline, along with the temperature in described server cabinet declines, the amount of evaporating for described server cabinet in the refrigerant liquid in described fluid reservoir is fewer, and the amount be stored in described reservoir is more, makes the liquid level V in described fluid reservoir
incontinuous rising, when described sensor detects the temperature T in described server cabinet
in≤ T
oand liquid level V in described fluid reservoir
inmeet scope V
in=V
l2time, enter step 30, otherwise, enter step 20.
4. the control method of a kind of direct-expansion-type machinery room energy-saving air conditioner according to claim 3, is characterized in that: the control mode of described first valve, described second valve and described 3rd valve is electronic or hydraulic drive.
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| CN113959122A (en) * | 2021-09-16 | 2022-01-21 | 青岛海尔空调电子有限公司 | Refrigeration system, control method and control device for refrigeration system |
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| CN105352211B (en) | 2018-01-09 |
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