CN203286826U - Refrigeration control system of machine room - Google Patents
Refrigeration control system of machine room Download PDFInfo
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- CN203286826U CN203286826U CN2013202576064U CN201320257606U CN203286826U CN 203286826 U CN203286826 U CN 203286826U CN 2013202576064 U CN2013202576064 U CN 2013202576064U CN 201320257606 U CN201320257606 U CN 201320257606U CN 203286826 U CN203286826 U CN 203286826U
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Abstract
The utility model relates to the technical field of refrigeration equipment, and discloses a refrigeration control system of a machine room. The refrigeration control system comprises a compressor, a condenser, a circulating pump, a throttling element and an evaporator. The compressor, the condenser, the circulating pump, the throttling element and the evaporator are sequentially connected through pipelines to form a closed loop. Refrigerating fluid is contained inside the pipelines. The condenser is arranged outdoors. A temperature sensor is arranged outdoors and used for detecting outdoor temperature information. A control device is respectively in signal connection with the temperature sensor, the circulating pump and the compressor and is used for controlling the circulating pump to be started and controlling the compressor to be started when the outdoor temperature is larger than the first set temperature threshold value and smaller than the second set temperature threshold value. According to the refrigeration control system, energy consumption is saved, and the energy utilization rate of the machine room is improved.
Description
Technical field
The utility model relates to technical field of refrigeration equipment, particularly relates to a kind of refrigeration control system of machine room.
Background technology
Along with the development of Modernized Information Technology, the number of national communications equipment room and scale, also in continuous expansion, reduce discharging under the call of policy at national energy-saving simultaneously, reduce energy consumption of machine room and have become the emphasis of the concern of numerous operators.According to investigations, only the operation power consumption of precision air conditioner just accounts for more than 50% of machine room total electricity consumption in machine room, and in the base station of One's name is legion, module office, the idle call electric weight can reach 70% left and right of base station or module office power consumption.Therefore, effectively reduce the air-conditioning power consumption and become the important directions that reduces energy consumption of machine room.
In recent years,, in order to save the energy consumption of air conditioner in machine room, adopt natural cooling source to freeze when temperature is low in the winter time, still adopt air conditioner compressed mechanism cold in other seasons, because a big chunk time whole year is all to adopt compressor cooling, therefore, energy consumption is higher.
The utility model content
The utility model provides a kind of refrigeration control system of machine room,, in order to reduce the energy consumption for cooling of machine room, improves energy utilization rate.
The refrigeration control system of the utility model machine room comprises:
Connect successively and form compressor, condenser, circulating pump, restricting element and the evaporimeter of closed cycle by pipeline, have cold-producing medium in described pipeline, described condenser is arranged on outdoor;
Temperature sensor, be arranged on outdoor, for detection of outdoor temperature information;
Control device, be connected with temperature sensor, circulating pump and signal compressor respectively, and while being used for when outdoor temperature greater than the first temperature threshold of setting and less than the second temperature threshold of setting, the compressor unlatching is opened and controlled to the controlled circulation pump.
Preferably, described control device comprises and judges whether outdoor temperature is not more than the first comparator of the first temperature threshold of setting, and the first processor that is connected with described the first comparator signal, when outdoor temperature is not more than the first temperature threshold of setting, described first processor controlled circulation pump is opened, wherein, the span of described the first temperature threshold is greater than-10 ℃ and less than 15 ℃.
Preferably, described control device comprises and judges whether outdoor temperature is not less than the second comparator of the second temperature threshold of setting, and the second processor that is connected with described the second comparator signal, when outdoor temperature is not less than the second temperature threshold of setting, described the second processor is controlled compressor and is opened, wherein, the span of described the second temperature threshold is greater than 20 ℃ and less than 30 ℃.
Better, described the first temperature threshold is 0 ℃, described the second temperature threshold is 25 ℃.
Preferably, described circulating pump is fixed pump, variable frequency pump or pressure regulating pump frequently, and described restricting element is electric expansion valve, heating power expansion valve, ball valve, capillary or orifice plate.
Preferably, described refrigeration control system also comprises:
The the first flow direction control valve spare that is arranged in parallel by the first bypass and described circulating pump;
When described circulating pump was opened, circulating pump pumped into restricting element with described cold-producing medium;
When described circulation pump, described cold-producing medium enters restricting element by the first flow direction control valve spare.
Preferably, described refrigeration control system also comprises:
The second flow direction control valve spare by the second bypass and the setting of described compressor parallel;
When described compressor is opened, enter condenser after the compressed machine compression of described cold-producing medium;
When described compressor cut out, described cold-producing medium entered condenser by the second flow direction control valve spare.
Better, described the first flow direction control valve spare is check valve, stop valve, ball valve or magnetic valve; Described the second flow direction control valve spare is check valve, stop valve, ball valve or magnetic valve.
Described refrigeration control system also comprises:
In closed cycle and the fluid reservoir between condenser and circulating pump.
The refrigeration control system that the utility model is above-mentioned, be particularly suitable for the long area of transition season.
In technical solutions of the utility model, condenser is arranged on outdoor, can utilize outdoor cold source to carry out heat exchange, cold-producing medium is compressed machine compression, heat release in condenser successively, and boosting through circulating pump, pass through again restricting element absorption refrigeration in evaporimeter, due to circulating pump and compressor synergy, therefore, this refrigeration control system, applicable to the transition season that accounts for the annual most of the time, therefore, has increased the running time of energy saver mode application, thereby reduced energy consumption, improved energy utilization rate.
Description of drawings
Fig. 1 is the refrigeration control system structural representation of the utility model the first embodiment machine room;
Fig. 2 is a kind of control device structural representation of the refrigeration control system of the utility model the first embodiment machine room;
The another kind of control device structural representation of the refrigeration control system of Fig. 3 the utility model the first embodiment machine room;
Fig. 4 is the refrigeration control system structural representation of the utility model the second embodiment machine room;
Fig. 5 is the refrigeration control system structural representation of the utility model the 3rd embodiment machine room;
Fig. 6 is the refrigeration control system structural representation of the utility model the 4th embodiment machine room;
Fig. 7 is the refrigeration control system structural representation of the utility model the 5th embodiment machine room;
Fig. 8 is the refrigeration control system structural representation of the utility model the 6th embodiment machine room;
Fig. 9 is the refrigeration control system structural representation of the utility model the 7th embodiment machine room;
Figure 10 is the refrigeration control system structural representation of the utility model the 8th embodiment machine room;
Figure 11 is the refrigeration control method one embodiment schematic flow sheet of the utility model machine room;
Figure 12 is the refrigeration control method specific embodiment schematic flow sheet of the utility model machine room;
Figure 13 is the refrigeration control device structural representation of the utility model machine room;
Figure 14 is the pressure-enthalpy chart of the refrigeration control system kind of refrigeration cycle process of existing machine room;
Figure 15 is the pressure-enthalpy chart of the refrigeration control system kind of refrigeration cycle process of the utility model machine room;
Figure 16 is the comparison diagram of the refrigerating capacity of the different mode under different outdoor temperatures;
Figure 17 is the comparison diagram of the refrigeration efficiency ratio of the different mode under different outdoor temperatures.
Reference numeral:
1-compressor 2-condenser 3-circulating pump 4-restricting element
5-evaporimeter 6-temperature sensor 7-control device 8-the first flow direction control valve spare
9-the second flow direction control valve spare 10-fluid reservoir 31-obtains equipment 32-control appliance
71-first comparator 72-first processor 73-second comparator 74-the second processor
The specific embodiment
in order to reduce the energy consumption for cooling of machine room, improve energy utilization rate, the utility model provides a kind of refrigeration control method of machine room, Apparatus and system, in this technical scheme, condenser is arranged on outdoor, can utilize outdoor cold source to carry out heat exchange, cold-producing medium is compressed machine compression successively, heat release in condenser, and boosting through circulating pump, pass through again restricting element absorption refrigeration in evaporimeter, due to circulating pump and compressor synergy, overcome the application bottleneck of throttling arrangement, thereby can make condensing pressure reduce, evaporating pressure is constant, the guaranteed while of cold has also been reduced the compressor power consumption, so this refrigeration control system is at the maximum energy-saving effect of the energy-conservation performance of the conditioning in Transition Season that accounts for the annual most of the time, and then reduced annual energy consumption, improved energy utilization rate., for making the purpose of this utility model, technical scheme and advantage clearer, below lift specific embodiment the utility model is described in further detail.
As shown in Figure 1, the first embodiment of the refrigeration control system of the utility model machine room comprises:
Connect successively and form compressor 1, condenser 2, circulating pump 3, restricting element 4 and the evaporimeter 5 of closed cycle by pipeline, have cold-producing medium in pipeline, condenser 2 is arranged on outdoor;
the refrigeration control system of the utility model machine room, form the compressor 1 of closed cycle, condenser 2, circulating pump 3, restricting element 4 and evaporimeter 5, can be according to the characteristics flexible topology of machine room building, condenser 2 is arranged on outdoor, be used for carrying out heat exchange with outdoor low-temperature receiver, this low-temperature receiver can be outdoor cold air, also can be outdoor cooling water, also can be from other cooling devices, compressor 1 can be the compressor of constant volume or fixed frequency, also can be the compressor of varying capacity or frequency conversion, be preferably the compressor of varying capacity or frequency conversion, different according to indoor load, can carry out to compressed action the adjustment of intelligence, in addition, temperature sensor 6 is not limit in outdoor installation site, as long as it is not affected by miscellaneous part and can detect outdoor temperature.the refrigeration control system of the utility model machine room, when outdoor temperature during greater than the first temperature threshold of setting and less than the second temperature threshold of setting, control device 7 controlled circulation pumps 3 are opened and are controlled compressor 1 and open, liquid refrigerant absorbs heat in evaporimeter 5, room air is cooling, cold-producing medium after evaporation is inhaled into compressor 1, compressed machine 1 acting, become the steam of HTHP, after gaseous refrigerant enters condenser 2, become liquid through the cooling of the forced-convection heat transfer with extraneous low-temperature receiver, from the condenser 2 cold-producing medium out circulating pump 3 of flowing through, through boosting of circulating pump 3, arrive restricting element 4, enter evaporimeter after restricting element 4 step-down throttlings, complete a kind of refrigeration cycle, condenser 2 is arranged on outdoor, can utilize outdoor cold source and condenser 2 to carry out heat exchange, the power of circulating pump 3 is very low, condenser 2 cold-producing medium out can be boosted, adopt circulating pump 3 and compressor 1 coordinated drive to carry out circularly cooling, can be applicable to the transition season that accounts for the annual long period, therefore, reduced energy consumption, greatly improved the energy utilization rate of machine room.In addition, the device of this refrigeration control system is less, and pipeline is simple, and therefore, cost is lower.Control device be except controlling compressor and/or circulating pump open by the signal of outdoor temperature, also can control by other parameter that is equal to outdoor temperature other parameter such as indoor/outdoor temperature-difference, condensing pressure etc.
In technical solutions of the utility model, described control device both can adopt software to realize controlling function, also can realize controlling function by hardware, while adopting hardware, control device comprises comparator and processor, comparator be used for outdoor temperature relatively respectively with the magnitude relationship of the second temperature threshold of the first temperature threshold of setting and setting, and processor is connected with comparator signal, carrys out the state of controlled circulation pump and compressor for the different signal of exporting for comparator.
The first temperature threshold, the second temperature threshold are rule of thumb set, need to meet the first temperature threshold less than the second temperature threshold, can be set as-3 ℃ as the first temperature threshold, the second temperature threshold can be set as 28 ℃, but the utility model is not limited to these concrete numerical value.
As shown in Figure 2, a kind of control device structural representation of the refrigeration control system of the utility model the first embodiment machine room, the control device 7 of the refrigeration control system of the utility model machine room comprises and judges whether outdoor temperature is not more than the first comparator 71 of the first temperature threshold of setting, and the first processor 72 that is connected with the first comparator 71 signals, when outdoor temperature is not more than the first temperature threshold of setting, first processor 72 controlled circulation pumps 3 are opened, wherein, the span of described the first temperature threshold is greater than-10 ℃ and less than 15 ℃.
the refrigeration control system of the utility model machine room, as shown in Figure 2, control device 7 adopts the first comparator 71 and the first mode of processing this class hardware of 72 devices to realize controlling function, the first comparator 71 is connected signal and is connected with temperature sensor, be used for judging whether outdoor temperature is not more than the first temperature threshold of setting, when outdoor temperature is not more than the first temperature threshold of setting, first processor 72 is controlled compressor 1 and is stopped, only adopt circulating pump 3 to drive the refrigerant circulation refrigeration, liquid refrigerant absorbs heat in evaporimeter 5, room air is cooling, arrive condenser from flow through compressor 1 of evaporimeter 5 cold-producing medium out, this moment, compressor 1 was only as components and parts that circulate, do not do work, forced-convection heat transfer through condenser 2, cold-producing medium becomes liquid, after circulating pump 3 actings, cold-producing medium enters evaporimeter 5 through restricting element 4, complete a pumping system kind of refrigeration cycle, the compressor 1 of this moment is equivalent to a flow-through element, only allow cold-producing medium pass through, and refrigerant compression is not done work, therefore, reduced the energy consumption of compressor 1, the power consumption of circulating pump 3 only, further energy savings.
As shown in Figure 3, the another kind of control device structural representation of the refrigeration control system of the utility model the first embodiment machine room, the control device 7 of the refrigeration control system of the utility model machine room comprises and judges whether outdoor temperature is not less than the second comparator 73 of the second temperature threshold of setting, and the second processor 74 that is connected with the second comparator 73 signals, when outdoor temperature is not less than the second temperature threshold of setting, the second processor 74 is controlled compressor 1 and is opened, wherein, the span of described the second temperature threshold is greater than 20 ℃ and less than 30 ℃.
the refrigeration control system of the utility model machine room, control device 7 adopts the mode of the second comparator 73 and second processor 74 these class hardware to realize controlling function, the second comparator 73 is connected with temperature sensor 6 signals, when outdoor temperature is not less than the second temperature threshold of setting, the second processor 74 is controlled compressor 1 and is opened, when outdoor temperature very high, summer for example, temperature is greater than 30 ℃, rising along with outside air temperature, operating pressure in refrigeration control system raises gradually, because operating in higher pressure limit, circulating pump 3 can affect the reliability of circulating pump 3, and this moment, compressor 1 and the synergistic pattern of circulating pump 3 were less with the ability difference of the pattern of compressor 1 acting only, therefore, circulating pump 3 stops, compressor 1 is opened, liquid refrigerant absorbs heat in evaporimeter 5, room air is cooling, cold-producing medium after evaporation is inhaled into compressor 1, compressed machine 1 acting, become the steam of HTHP, after gaseous refrigerant enters condenser, become liquid through the cooling of the forced-convection heat transfer with outside air, after flow through circulating pump 3 from condenser 2 cold-producing medium out, this moment, circulating pump 3 did not do work, it is only a circulation element, arrive again restricting element 4, enter evaporimeter 5 after restricting element 4 step-down throttlings, complete a compressor cooling circulation.In this case, only adopt compressor 1 acting, the energy consumption of refrigeration control system is higher, but because outdoor temperature is higher, and the number of days as greater than 30 ℃ the time is few, therefore, less on the Energy Efficiency Ratio impact of the whole year.
In the refrigeration control system of the utility model machine room, first processor 72 and the second processor 74 can be merged into a processor and process, namely this processor respectively with the first comparator 71 be connected comparator 73 signals and be connected, be used for controlling the state of compressor 1 and circulating pump 3.
Preferably, the refrigeration control system of the utility model machine room, the interval of described the first temperature threshold are (10 ℃, 15 ℃), and the interval of described the second temperature threshold is (20 ℃, 30 ℃).
The refrigeration control system of the utility model machine room, because although the pattern Energy Efficiency Ratio that only adopts circulating pump 3 is higher, but the rising along with outside air temperature, the refrigerating capacity of refrigeration control system there will be very large decay, therefore the equilibrium of consideration ability and efficiency, the interval of the first temperature threshold is (10 ℃, 15 ℃); Rising along with outside air temperature, operating pressure in refrigeration control system raises gradually, because pump operating cycle can affect the reliability of pump in higher pressure limit, and this moment, compressor and the synergistic pattern of circulating pump were less with the ability difference of the pattern of compressor work only, therefore the interval of the second temperature threshold is (20 ℃, 30 ℃).
Better, described the first temperature threshold is 0 ℃, described the second temperature threshold is 25 ℃.
The utility model refrigeration control system, as previous reasons, the preferred temperature range of the synergistic mode operation of compressor and circulating pump is less than 25 ℃ greater than 0 ℃.
Refrigeration control system of the present utility model, circulating pump 3 is fixed pump, variable frequency pump or pressure regulating pump frequently, restricting element 4 is electric expansion valve, heating power expansion valve, ball valve, capillary or orifice plate.
In the technical solution of the utility model, circulating pump 3 can be preferably variable frequency pump or the pressure regulating pump that can carry out Flow-rate adjustment for determining frequency pump, variable frequency pump or pressure regulating pump, like this can be according to the flow of refrigeration control system, the acting of circulating pump 3 also changes thereupon, further energy efficient; Restricting element 4 can adopt electric expansion valve, heating power expansion valve, ball valve, capillary or orifice plate, preferably adopts electric expansion valve, can be according to the intelligent quick adjustment flow system flow of load, further energy efficient.
As shown in Figure 4, the second embodiment of the refrigeration control system of the utility model machine room also comprises:
The the first flow direction control valve spare 8 that is arranged in parallel by the first bypass and circulating pump 3;
When described circulating pump 3 was opened, circulating pump 3 pumped into restricting element 4 with described cold-producing medium;
When described circulating pump 3 cut out, described cold-producing medium entered restricting element 4 by the first flow direction control valve spare 8.
in the technical solution of the utility model, as shown in Figure 4, increase by a road in the import and export outside of the circulating pump 3 of the first embodiment refrigeration control system and have the first bypass of the first flow direction control valve spare 8, temperature sensor and control device do not draw: when the pattern of compressor work only, compressor 1 and the first flow direction control valve spare 8 are opened, circulating pump 3 cuts out, due to this moment cold-producing medium larger than directly passing through first-class resistance to valve member 8 through circulating pump 3, therefore, can directly by the first bypass, arrive restricting element 4 from condenser 2 cold-producing medium out, reduce the resistance of refrigeration control system, when compressor and the synergistic pattern of circulating pump, compressor 1 and circulating pump 3 are all opened, and this moment, circulating pump 3 sucked cold-producing medium in it, and therefore, cold-producing medium directly pumps into restricting element 4 through circulating pump 3, and cold-producing medium does not pass through from the first flow direction control valve spare 8, when the pattern of only circulating pump acting, circulating pump 3 is opened, and this moment, circulating pump 3 sucked cold-producing medium in it, and therefore, cold-producing medium directly pumps into restricting element 4 through circulating pump 3, and cold-producing medium does not pass through from the first flow direction control valve spare 8.
As shown in Figure 5, the 3rd embodiment of the refrigeration control system of the utility model machine room also comprises:
The the second flow direction control valve spare 9 that is arranged in parallel by the second bypass and compressor 1;
When described compressor 1 is opened, enter condenser 2 after compressed machine 1 compression of described cold-producing medium;
When described compressor 1 cut out, described cold-producing medium entered condenser 2 by the second flow direction control valve spare 9.
In technical solutions of the utility model, as shown in Figure 5, increase by a road in the import and export outside of the circulating pump 3 of the first embodiment refrigeration control system and have the second bypass of the second flow direction control valve spare 9, temperature sensor and control device do not draw: when the pattern of only circulating pump acting, compressor 1 cuts out, due to this moment cold-producing medium through compressor 3 than directly large to the resistance of valve member 9 by second, therefore, can directly by the second bypass, arrive condenser 2 from evaporimeter 5 cold-producing medium out, reduce the resistance of refrigeration control system; In compressor and the synergistic pattern of circulating pump, compressor 1 and circulating pump 3 are all opened, and this moment, compressor 1 sucked cold-producing medium in it, therefore, enter condenser 2 after direct compressed machine 1 compression of cold-producing medium, and cold-producing medium do not pass through from the second flow direction control valve spare 9; Only during the pattern of compressor work, compressor 1 is opened, and this moment, compressor 1 sucked cold-producing medium in it, therefore, enter condenser 2 after direct compressed machine 1 compression of cold-producing medium, and cold-producing medium does not pass through from the second flow direction control valve spare 9.
As shown in Figure 6, the 4th embodiment of the refrigeration control system of the utility model machine room on the basis of the second embodiment, also comprises:
The the second flow direction control valve spare 9 that is arranged in parallel by the second bypass and compressor 1;
When described compressor 1 is opened, enter condenser 2 after compressed machine 1 compression of described cold-producing medium;
When described compressor 1 cut out, described cold-producing medium entered condenser 2 by the second flow direction control valve spare 9.
In technical solutions of the utility model, as shown in Figure 6, increase by a road in the import and export outside of the circulating pump 3 of the second embodiment refrigeration control system and have the second bypass of the second flow direction control valve spare 9, temperature sensor and control device do not draw: when the pattern of only circulating pump acting, compressor 1 cuts out, circulating pump 3 is opened, at this moment, because cold-producing medium is larger than the resistance that directly passes through the second flow direction control valve spare 9 through compressor 3, therefore, can directly by the second bypass, arrive condenser 2 from evaporimeter 5 cold-producing medium out; And circulating pump 3 will suck in it from condenser 2 cold-producing medium out, and therefore, cold-producing medium directly pumps into restricting element 4 through circulating pump 3, and cold-producing medium does not pass through from the first flow direction control valve spare 8, has reduced the resistance of refrigeration control system; In compressor and the synergistic pattern of circulating pump, compressor 1 and circulating pump 3 are all opened, at this moment, enter restricting element 4 from condenser 2 cold-producing medium out through circulating pump 3, and enter condenser 2 after 1 compression of the compressed machine of evaporimeter 5 cold-producing medium out, and cold-producing medium by first-class to controlling valve member 8 and the second flow direction control valve spare 9; Only during the pattern of compressor work, compressor 1 is opened, and circulating pump 3 cuts out, and from compressed machine 1 compression of evaporimeter 5 cold-producing medium out, enters condenser 2, directly by the first bypass, enter restricting element 4 from condenser 2 cold-producing medium out, reduced the resistance of system.
Better, described the first flow direction control valve spare 8 is check valve, stop valve, ball valve or magnetic valve; Described the second flow direction control valve spare 9 is check valve, stop valve, ball valve or magnetic valve.
In technical solutions of the utility model, the first flow direction control valve and the second flow direction control valve can be check valve, stop valve, ball valve or magnetic valve, wherein, be preferably check valve, one-way valve structures is simple, and cost is low, can realize automatically opening or closing according to the pressure reduction of check valve both sides; Ball valve can be electrical ball valve; And magnetic valve can be connected with the control device signal, and when the compressor in parallel with magnetic valve or circulating pump were in closed condition, control device was controlled magnetic valve and opened.
In the refrigeration control system of the machine room of the utility model embodiment, also comprise:
In closed cycle and the fluid reservoir 10 between condenser 2 and circulating pump 3.Below the 5th embodiment to the eight embodiment by Fig. 7 to Figure 10 are described in detail respectively, and temperature sensor and control device in Fig. 7 to Figure 10 do not draw.
as shown in Figure 7, the 5th embodiment of the refrigeration control system of the utility model machine room, increasing a fluid reservoir 10 between condenser 2 and circulating pump 3 on the basis of the first embodiment, the cold-producing medium that on a small quantity through condenser 2 heat exchange, does not become liquid fully can carry out vapor-liquid separation in fluid reservoir 10, liquid refrigerant due to weight distribution below fluid reservoir 10, make in fluid reservoir 10 and ensure all the time certain liquid refrigerant, difference in height between the import of fluid reservoir 10 and circulating pump 3 provides certain pressure reduction for system, reduce circulating pump 3 cavitation erosion possibilities, different operating mode operations simultaneously can cause the best refrigerant charge of system different, can utilize liquid storage to fill with 10 and guarantee that the refrigerant amount in condenser 2 and evaporimeter 5 remains best.
As shown in Figure 8, the 6th embodiment of the refrigeration control system of the utility model machine room, increasing a fluid reservoir 10 between condenser 2 and circulating pump 3 on the basis of the second embodiment, reduce the possibility of circulating pump 3 cavitation erosions by fluid reservoir 10, also can guarantee that the refrigerant amount in condenser 2 and evaporimeter 5 remains best simultaneously.Consistent in each device and the switching of each valve and the second embodiment under different mode, just repeat no more here.
As shown in Figure 9, the 7th embodiment of the refrigeration control system of the utility model machine room, increasing a fluid reservoir 10 between condenser 2 and circulating pump 3 on the basis of the 3rd embodiment, reduce the possibility of circulating pump 3 cavitation erosions by fluid reservoir 10, also can guarantee that the refrigerant amount in condenser 2 and evaporimeter 5 remains best simultaneously.Consistent in each device and the switching of each valve and the 3rd embodiment under different mode, just repeat no more here.
As shown in figure 10, the 8th embodiment of the refrigeration control system of the utility model machine room, increasing a fluid reservoir 10 between condenser 2 and circulating pump 3 on the basis of the 4th embodiment, reduce the possibility of circulating pump 3 cavitation erosions by fluid reservoir 10, also can guarantee that the refrigerant amount in condenser 2 and evaporimeter 5 remains best simultaneously.Consistent in each device and the switching of each valve and the 4th embodiment under different mode, just repeat no more here.
As shown in figure 11, the refrigeration control method of the utility model embodiment machine room comprises:
If so, execution step 103, otherwise, return to step 101;
This embodiment method is applicable to outdoor temperature while not being very high, and for example in season in spring and autumn, be 0 ℃ as the first temperature threshold of setting, the second temperature threshold of setting is 20 ℃, adopt compressor and circulating pump synergy, reduced on the whole the energy consumption of machine room, improved its energy utilization rate.
The refrigeration control method of the utility model machine room further comprises:
When outdoor temperature was not more than the first temperature threshold of setting, the controlled circulation pump was opened.
The present embodiment method is applicable to outdoor temperature when low, and for example in winter, be-5 ℃ as the first temperature threshold of setting, namely when outdoor temperature during less than-5 ℃, and 3 unlatchings of controlled circulation pump.Winter, the outdoor cold source temperature was very low, directly utilize condenser and outdoor cold source to carry out heat exchange and just the temperature of cold-producing medium can be dropped to the degree of enough refrigeration, therefore, only need circulating pump work this moment, facilitates the circulation of cold-producing medium to get final product, because the power of circulating pump is very low, therefore, this programme has significant energy-saving effect, has reduced energy consumption, has improved the energy utilization rate of machine room.
The refrigeration control method of the utility model machine room also further comprises:
When outdoor temperature is not less than the second temperature threshold of setting, controls compressor and open.
The method of the present embodiment is applicable to outdoor environment temperature when very high, summer for example, the second temperature threshold as setting is 28 ℃, when namely outdoor temperature is not less than 28 ℃, controls compressor 1 and opens, in this scheme, compressor operating, energy consumption is higher, but the ratio in the whole year is lower due to higher than 28 ℃ the time, therefore, less on the Energy Efficiency Ratio impact of the whole year.
Refrigeration control method of the present utility model, also comprise the control method corresponding with the second embodiment to the eight embodiment in refrigeration control system, just do not repeat one by one here.
As shown in figure 12, a specific embodiment of the refrigeration control method of the utility model machine room comprises the following steps:
Step 201, obtain current outdoor temperature information;
Step 202, judge whether outdoor temperature is not more than the first temperature threshold of setting; If so, execution step 203, otherwise, execution step 204;
Step 203, controlled circulation pump are opened;
Step 204, judge whether outdoor temperature is not less than the second temperature threshold of setting; If so, execution step 205, otherwise, execution step 206;
Step 205, control compressor are opened;
Step 206, controlled circulation pump are opened and are controlled compressor and open.
As shown in figure 13, based on identical utility model design, the utility model also provides a kind of refrigeration control device of machine room, comprising:
Obtain equipment 31, be used for obtaining outdoor temperature information;
Control appliance 32, while being used for when outdoor temperature greater than the first temperature threshold of setting and less than the second temperature threshold of setting, the compressor unlatching is opened and controlled to the controlled circulation pump.
Preferably, control appliance 32, be further used for when outdoor temperature is not more than the first temperature threshold of setting, and the controlled circulation pump is opened.
Preferably, control appliance 32, be further used for when outdoor temperature is not less than the second temperature threshold of setting, controls compressor and open.
Substantially in 3.0 left and right, compared to other air conditioner in machine room, the advantage of the utility model refrigeration control system is based on the annual Energy Efficiency Ratio of the refrigeration system of prior art background:
The firstth, improve transition season, be refrigerating capacity and the efficiency of spring and autumn: the utility model refrigeration control system adopts compressor and the synergistic pattern of pump at transition season, this pattern is by the boosting of circulating pump, overcome by reducing the bottleneck of condensing pressure hoisting power and efficiency, make condensing pressure to reduce, the compressor work depletion is few, and other partial properties of simultaneity factor are unaffected, and then the raising system capability, improving energy efficiency.
Below bright the utility model refrigeration control system improves refrigerating capacity at first from the principle, and the effect that can improve efficiency.Refrigerating capacity, i.e. refrigerating capacity, unit can be kW; Energy efficiency coefficient (Coefficient Of Performance is called for short COP) is consistent with Energy Efficiency Ratio, Energy Efficiency Ratio (Energy Efficiency Ratio, abbreviation EER) refer to the conversion proportion of heat at gross energy, dimensionless, COP or EER are higher, illustrate that refrigerating efficiency is higher; Annual Energy Efficiency Ratio (Annual Energy Efficiency Ratio is called for short AEER) refers to the refrigerating capacity of a year in the conversion proportion of gross energy, dimensionless, and AEER is higher, illustrate that the refrigerating efficiency of the whole year is higher.
As shown in figure 14, the pressure-enthalpy chart of the refrigeration control system kind of refrigeration cycle process of existing machine room, theoretically, for existing compressor cooling circulation (D-A-B-C-D), reduction (D '-A '-B '-C '-D ' as shown in figure 14 circulates) along with condensing pressure, the refrigerating capacity of system increases, efficiency improves, but in actual applications, due to the restriction that is subjected to restricting element in refrigeration system, the reduction of condensing pressure can cause the reduction of evaporating pressure, causes the reduction of cold, can not bring good energy-saving effect.This is because of the reduction along with condensing pressure, at this restricting element take expansion valve as example, the inlet outlet pressure differential that is expansion valve constantly reduces, the aperture of expansion valve will constantly increase, thereby compensate the part flow that reduces to reduce due to pressure reduction, but when pressure reduction is reduced to a certain value, expansion valve will reach full-gear, after this flow, because can not get compensation, can only sharply reduce along with reducing of pressure reduction, thereby cause reducing of overall refrigerating effect.So,, for existing compressor refrigeration system, by reducing condensing pressure, come the power-economizing method of augmenting ability improving energy efficiency to be subject to restriction.
as shown in figure 15, the pressure-enthalpy chart of the refrigeration control system kind of refrigeration cycle process of the utility model machine room, take the compressor that adopts and the synergistic pattern of circulating pump as example, its refrigeration principle is seen Figure 15 (circulation D '-A '-B ’ – C '-C "-D '), liquid refrigerant absorb heat in evaporimeter (D '-A '), room air is cooling, cold-producing medium after evaporation is inhaled into compressor, compressed machine acting (A '-B '), become the steam of HTHP, after gaseous refrigerant enters condenser, through with the forced-convection heat transfer of outside air cooling, becoming liquid (B '-C '), from the condenser cold-producing medium out circulating pump of flowing through, through the boosting of circulating pump (C '-C "), arrive restricting element, enter evaporimeter (C ' '-D ') after restricting element step-down throttling, complete a kind of refrigeration cycle.Wherein the boosting by circulating pump has overcome the restriction of restricting element for refrigeration system, makes condensation temperature to reduce, and the compressor work depletion is few, and other partial properties of simultaneity factor are unaffected, thereby improves system capability, has promoted efficiency.
Secondly, illustrate that with a concrete example compressor and the synergistic pattern of circulating pump can improve refrigerating capacity, improving energy efficiency.Figure 16 is the comparison diagram of the refrigerating capacity of the different mode under different outdoor temperatures, Figure 17 is the comparison diagram of the refrigeration efficiency ratio of the different mode under different outdoor temperatures, as shown in Figure 16 and Figure 17, lines with round dot are the curve of compressor and the synergistic pattern of circulating pump, lines with fork are the curve of the pattern of compressor work only, can find out in the temperature range of transition season from Figure 16 and Figure 17, Figure 16 and Figure 17 are in-10 ℃ to 25 ℃ temperature ranges, the refrigerating capacity of compressor and the synergistic pattern of circulating pump and Energy Efficiency Ratio are than the pattern of compressor work only, all can maintain higher level, as seen adopt compressor and the synergistic pattern of circulating pump, for air conditioner in machine room energy-conservation, very large meaning is arranged at transition season.
The secondth, the annual Energy Efficiency Ratio of raising system: due to the utility model refrigeration control system by adopt the only pattern of circulating pump work when temperature is low, account for annual transition season employing compressor and circulating pump synergy pattern greatly, thereby making the annual Energy Efficiency Ratio of whole system obtain improving significantly.Table 1 and table 2 calculate its annual Energy Efficiency Ratio as an example of Beijing example, can find out and account for annual 72.2% ratio for Beijing due to transition season, therefore the lifting of transition season efficiency has conclusive impact for annual Energy Efficiency Ratio, choose simultaneously the city of national emphasis and calculate its annual Energy Efficiency Ratio, can find out in China by table 3, the application of the utility model refrigeration control system all has very large effect to the raising of annual Energy Efficiency Ratio.
Table 1. Temperature Distribution coefficient (Beijing)
| Outdoor temperature (℃) | 35 | 25 | 15 | 5 | -5 |
| The Temperature Distribution coefficient | Ta（%） | Tb（%） | Tc（%） | Td（%） | Te（%） |
| Beijing | 7.20 | 28.10 | 23.10 | 21.00 | 20.60 |
Table 2. systematic energy efficiency ratio (Beijing)
The annual Energy Efficiency Ratio in each big city, table 3. whole nation
Obviously, those skilled in the art can carry out various changes and modification and not break away from spirit and scope of the present utility model the utility model.Like this, if within of the present utility model these are revised and modification belongs to the scope of the utility model claim and equivalent technologies thereof, the utility model also is intended to comprise these changes and modification interior.
Claims (8)
1. the refrigeration control system of a machine room, is characterized in that, comprising:
Connect successively and form compressor (1), condenser (2), circulating pump (3), restricting element (4) and the evaporimeter (5) of closed cycle by pipeline, have cold-producing medium in described pipeline, described condenser (2) is arranged on outdoor;
Temperature sensor (6), be arranged on outdoor, for detection of outdoor temperature information;
Control device (7), be connected 1 with temperature sensor (6), circulating pump (3) with compressor respectively) signal is connected, while being used for when outdoor temperature greater than the first temperature threshold of setting and less than the second temperature threshold of setting, compressor (1) unlatching is opened and controlled to controlled circulation pump (3).
2. refrigeration control system as claimed in claim 1, it is characterized in that, described control device (7) comprises and judges whether outdoor temperature is not more than first comparator (71) of the first temperature threshold of setting, and the first processor (72) that is connected with described the first comparator (71) signal, when outdoor temperature is not more than the first temperature threshold of setting, described first processor (72) controlled circulation pump (3) is opened, wherein, the span of described the first temperature threshold is greater than-10 ℃ and less than 15 ℃.
3. refrigeration control system as claimed in claim 1, it is characterized in that, described control device (7) comprises and judges whether outdoor temperature is not less than second comparator (73) of the second temperature threshold of setting, and the second processor (74) that is connected with described the second comparator (73) signal, when outdoor temperature is not less than the second temperature threshold of setting, described the second processor (74) is controlled compressor (1) and is opened, wherein, the span of described the second temperature threshold is greater than 20 ℃ and less than 30 ℃.
4. refrigeration control system as claimed in claim 1, is characterized in that, described circulating pump (3) is fixed pump, variable frequency pump or pressure regulating pump frequently, and described restricting element (4) is electric expansion valve, heating power expansion valve, ball valve, capillary or orifice plate.
5. refrigeration control system as claimed in claim 1, is characterized in that, also comprises:
The the first flow direction control valve spare (8) that is arranged in parallel by the first bypass and described circulating pump (3);
When described circulating pump (3) was opened, circulating pump (3) pumped into restricting element (4) with described cold-producing medium;
While closing, described cold-producing medium enters restricting element (4) by the first flow direction control valve spare (8) when described circulating pump (3).
6. refrigeration control system as described in claim 1 or 5, is characterized in that, also comprises:
The the second flow direction control valve spare (9) that is arranged in parallel by the second bypass and described compressor (1);
When described compressor (1) is opened, enter condenser (2) after the compressed machine of described cold-producing medium (1) compression;
While closing, described cold-producing medium enters condenser (2) by the second flow direction control valve spare (9) when described compressor (1).
7. refrigeration control system as claimed in claim 6, is characterized in that, described the first flow direction control valve spare (8) is check valve, stop valve, ball valve or magnetic valve; Described the second flow direction control valve spare (9) is check valve, stop valve, ball valve or magnetic valve.
8., as claim 1,5 or 7 described refrigeration control systems, it is characterized in that, also comprise:
Be arranged in closed cycle and be positioned at condenser (2) and circulating pump (3) between fluid reservoir (10).
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103277880A (en) * | 2013-05-13 | 2013-09-04 | 艾默生网络能源有限公司 | Refrigeration control method, device and system of machine room |
| CN105423656A (en) * | 2015-12-23 | 2016-03-23 | 广东美的暖通设备有限公司 | Refrigeration system and control method thereof |
| WO2016141791A1 (en) * | 2015-03-10 | 2016-09-15 | 深圳市艾特网能有限公司 | Hybrid-power refrigerating system and control method thereof |
| CN107104373A (en) * | 2017-06-01 | 2017-08-29 | 合肥尚强电气科技有限公司 | A kind of heat dissipation power distribution box |
| CN109237844A (en) * | 2017-05-08 | 2019-01-18 | 维谛技术有限公司 | The refrigeration control method and device of air-conditioning system, air-conditioning system |
| WO2019214297A1 (en) * | 2018-05-09 | 2019-11-14 | 青岛海尔空调电子有限公司 | Server room air conditioning system |
| CN114087842A (en) * | 2021-10-11 | 2022-02-25 | 青岛澳柯玛冷链集成有限公司 | Automatic temperature control method and system for realizing refrigeration and heating |
| CN115406133A (en) * | 2021-05-27 | 2022-11-29 | 上海兴邺材料科技有限公司 | Air conditioning system and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103277880A (en) * | 2013-05-13 | 2013-09-04 | 艾默生网络能源有限公司 | Refrigeration control method, device and system of machine room |
| WO2016141791A1 (en) * | 2015-03-10 | 2016-09-15 | 深圳市艾特网能有限公司 | Hybrid-power refrigerating system and control method thereof |
| CN105423656A (en) * | 2015-12-23 | 2016-03-23 | 广东美的暖通设备有限公司 | Refrigeration system and control method thereof |
| CN109237844A (en) * | 2017-05-08 | 2019-01-18 | 维谛技术有限公司 | The refrigeration control method and device of air-conditioning system, air-conditioning system |
| CN109237844B (en) * | 2017-05-08 | 2021-02-19 | 维谛技术有限公司 | Air conditioning system, and refrigeration control method and device of air conditioning system |
| CN107104373A (en) * | 2017-06-01 | 2017-08-29 | 合肥尚强电气科技有限公司 | A kind of heat dissipation power distribution box |
| WO2019214297A1 (en) * | 2018-05-09 | 2019-11-14 | 青岛海尔空调电子有限公司 | Server room air conditioning system |
| CN115406133A (en) * | 2021-05-27 | 2022-11-29 | 上海兴邺材料科技有限公司 | Air conditioning system and control method thereof |
| CN115406133B (en) * | 2021-05-27 | 2024-05-31 | 上海兴邺材料科技有限公司 | Air conditioning system and control method thereof |
| CN114087842A (en) * | 2021-10-11 | 2022-02-25 | 青岛澳柯玛冷链集成有限公司 | Automatic temperature control method and system for realizing refrigeration and heating |
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Address after: Nanshan District Xueyuan Road in Shenzhen city of Guangdong province 518055 No. 1001 Nanshan Chi Park building B2 Patentee after: VERTIV TECH Co.,Ltd. Address before: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee before: EMERSON NETWORK POWER Co.,Ltd. |
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