CN203501316U - Air conditioning system - Google Patents
Air conditioning system Download PDFInfo
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- CN203501316U CN203501316U CN201320242682.8U CN201320242682U CN203501316U CN 203501316 U CN203501316 U CN 203501316U CN 201320242682 U CN201320242682 U CN 201320242682U CN 203501316 U CN203501316 U CN 203501316U
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Abstract
The utility model relates to an air conditioning system (100A, 100B, 100C, 100D, 100E, 100F, 100G and 100H), which comprises a compressor (10), a condenser (20), a pump (50), a throttling device (30), an evaporator (40), an overheat detection device (SH) and a control device (200), wherein the condenser (20) is connected to the downstream of the compressor (10) through a first pipeline; the pump (50) is connected to the downstream of the condenser (20) through a second pipeline; the throttling device (30) is connected to the downstream of the pump (50) through a third pipeline; the evaporator (40) is connected to the downstream of the throttling device (30) through a fourth pipeline, and is connected with the compressor (10) through a fifth pipeline; the overheat detection device (SH) is used for acquiring the overheat of the air conditioning system; the control device (200) is used for controlling the flow of the air conditioning system to be basically substantially matched with optimal cooling capacity under a current working condition according to the overheat acquired by the overheat detection device (SH).
Description
Technical field
The utility model relates to a kind of air-conditioning system.
Background technology
The content of this part only provides the background information relevant to the disclosure, and it may not form prior art.
In recent years, more and more higher to the requirement of the energy-conserving and environment-protective of air-conditioning system.Particularly, in the communications field, along with communication network scale and userbase constantly expand, the power consumption of communication enterprise equipment operation has become ever-increasing important cost.Because communications equipment room caloric value is large, so the air-conditioning system of machine room needs round-the-clock running.According to investigations, in machine room, only the operation power consumption of air precision air conditioning system just accounts for the more than 50% of machine room total electricity consumption, and in the base station of One's name is legion, module office, the power consumption of air-conditioning system can reach 70% left and right of base station or module office power consumption.
Therefore, need a kind of more energy-conservation and more simple air-conditioning system of line arrangement.
Utility model content
The purpose of this utility model is to provide a kind of more energy-conservation and more simple air-conditioning system of line arrangement.
According to an aspect of the present utility model, a kind of air-conditioning system is provided, comprising: compressor; Via the first pipeline, be connected to the condenser in described compressor downstream; Via the second pipeline, be connected to the pump in described condenser downstream; Via the 3rd pipeline, be connected to the throttling arrangement in described pump downstream; Via the 4th pipeline, be connected to the evaporimeter in described throttling arrangement downstream, described evaporimeter is connected with described compressor via the 5th pipeline; For obtaining the degree of superheat checkout gear of the degree of superheat of described air-conditioning system; And for the degree of superheat obtaining according to the described degree of superheat checkout gear flow of described air-conditioning system is controlled so that described flow substantially with current working under the control device that matches of best cold.
According to an aspect of the present utility model, air-conditioning system can further comprise for determining the poor determining device of indoor and outdoor temperature of the temperature difference between indoor temperature and outdoor temperature.
According to an aspect of the present utility model, when the definite temperature difference of the poor determining device of described indoor and outdoor temperature is greater than predetermined value, described control device can be controlled and make described pump operation and make described compressor shutdown.
According to an aspect of the present utility model, the degree of superheat obtaining when described degree of superheat checkout gear is in the first preset range time, and described control device maintains the running of described air-conditioning system; And the degree of superheat obtaining when described degree of superheat checkout gear is outside described the first preset range time, and described control device regulates the flow of described air-conditioning system.
According to an aspect of the present utility model, when described pump starts to start, described control device is controlled described pump or described throttling arrangement and is made the flow of described air-conditioning system be increased to gradually predetermined amount of flow since 0 to make the degree of superheat of described air-conditioning system within described the first preset range.
According to an aspect of the present utility model, the degree of superheat obtaining when described degree of superheat checkout gear is greater than described the first preset range upper in limited time, described control device increases the flow of described air-conditioning system, and the degree of superheat of working as described degree of superheat checkout gear acquisition is less than the lower of described the first preset range and prescribes a time limit, and described control device reduces the flow of described air-conditioning system.
According to an aspect of the present utility model, described control device regulates the flow of described air-conditioning system by controlling the flow of described pump or the aperture of described throttling arrangement.
According to an aspect of the present utility model, when the definite temperature difference of the poor determining device of described indoor and outdoor temperature is less than or equal to described predetermined value, described control device is controlled and is made described compressor operating.
According to an aspect of the present utility model, in described compressor operating, described pump is shut down.
According to an aspect of the present utility model, the degree of superheat obtaining when described degree of superheat checkout gear is in the second preset range time, and described control device maintains the running of described air-conditioning system; And the degree of superheat obtaining when described degree of superheat checkout gear is outside described the second preset range time, and described control device regulates the flow of described air-conditioning system.
According to an aspect of the present utility model, the degree of superheat obtaining when described degree of superheat checkout gear is greater than described the second preset range upper in limited time, described control device increases the flow of described air-conditioning system, and the degree of superheat of working as described degree of superheat checkout gear acquisition is less than the lower of described the second preset range and prescribes a time limit, and described control device reduces the flow of described air-conditioning system.
According to an aspect of the present utility model, described control device can regulate by controlling the aperture of described throttling arrangement the flow of described air-conditioning system.
According to an aspect of the present utility model, in described compressor operating, described pump also moves.
According to an aspect of the present utility model, described control device can regulate by controlling the flow of described pump or the aperture of described throttling arrangement the flow of described air-conditioning system.
According to an aspect of the present utility model, described degree of superheat checkout gear can be arranged in described the first pipeline or described the 5th pipeline.
According to an aspect of the present utility model, described degree of superheat checkout gear can be arranged on the porch of described compressor.
According to an aspect of the present utility model, described degree of superheat checkout gear can comprise for detection of the temperature sensor of the temperature of working fluid with for detection of the first pressure sensor of the pressure of working fluid.
According to an aspect of the present utility model, described pump is the adjustable pump of flow.
According to an aspect of the present utility model, described pump is variable frequency pump or pressure regulating pump.
According to an aspect of the present utility model; in the porch of described pump, be provided with the second pressure sensor; at described delivery side of pump place, be provided with the 3rd pressure sensor; and when the pressure differential between described the second pressure sensor and described the 3rd pressure sensor is outside the 3rd preset range, described control device is protected described pump.
According to an aspect of the present utility model; in the porch of described pump, be provided with second quantity sensor; at described delivery side of pump place, be provided with the 3rd flow sensor; and when the difference in flow between described second quantity sensor and described the 3rd flow sensor is outside the 4th preset range, described control device is protected described pump.
According to an aspect of the present utility model, can in the second pipeline between described condenser and described pump, fluid reservoir be set.
According to an aspect of the present utility model, described air-conditioning system can further comprise the first bypass of pump described in bypass, in described the first bypass, is provided with Flow-rate adjustment element.
According to an aspect of the present utility model, described control device is controlled described Flow-rate adjustment element to regulate the flow of described air-conditioning system.
According to an aspect of the present utility model, described air-conditioning system can further comprise the second bypass of pump described in bypass, in described the second bypass, is provided with valve, and described valve constitution becomes to open when described compressor operating and closes during in described compressor shutdown.
Adopt structure of the present utility model, not only can make the efficiency of air-conditioning system further improve but also the structure of whole system is simplified more.
Accompanying drawing explanation
By the description referring to accompanying drawing, it is easier to understand that the feature and advantage of one or several embodiment of the present utility model will become, wherein:
Fig. 1 is the schematic diagram of the known air-conditioning system that comprises pump and compressor of a kind of applicant;
Fig. 2 is according to the schematic diagram of the air-conditioning system that comprises pump and compressor of the utility model the first embodiment;
Fig. 3 is the schematic control chart of air-conditioning system shown in Fig. 2;
Fig. 4 is the schematic diagram that the degree of superheat of the compressor assembly in air-conditioning system shown in Fig. 2 is controlled;
The schematic diagram of flow when Fig. 5 A and 5B are respectively the startup of the pumping system in air-conditioning system shown in Fig. 2 and the control of the degree of superheat;
Fig. 6 is the schematic diagram that the degree of superheat of the pumping system in air-conditioning system shown in Fig. 2 is controlled;
Fig. 7 is the schematic diagram that the pressure protect of the pumping system in air-conditioning system shown in Fig. 2 is controlled;
Fig. 8 is the schematic diagram that the traffic protection of the pumping system in air-conditioning system shown in Fig. 2 is controlled;
The chart of Fig. 9 schematically shows the relation between different temperatures down-off and refrigerating capacity;
Figure 10 is according to the schematic diagram of the air-conditioning system that comprises pump and compressor of the utility model the second embodiment;
Figure 11 is according to the schematic diagram of the air-conditioning system that comprises pump and compressor of the utility model the 3rd embodiment;
Figure 12 is according to the schematic diagram of the air-conditioning system that comprises pump and compressor of the utility model the 4th embodiment;
Figure 13 is according to the schematic diagram of the air-conditioning system that comprises pump and compressor of the utility model the 5th embodiment;
Figure 14 is according to the schematic diagram of the air-conditioning system that comprises pump and compressor of the utility model the 6th embodiment;
Figure 15 is according to the schematic diagram of the air-conditioning system that comprises pump and compressor of the utility model the 7th embodiment; And
Figure 16 is according to the schematic diagram of the air-conditioning system that comprises pump and compressor of the utility model the 8th embodiment.
The specific embodiment
Description related to the preferred embodiment is only exemplary below, and is never the restriction to the utility model and application or usage.In each accompanying drawing, adopt identical Reference numeral to represent identical parts, so the structure of same parts will no longer be repeated in this description.
Fig. 1 shows the known composite air conditioner system that comprises pump and compressor of a kind of applicant, but this air-conditioning system not necessarily forms prior art of the present utility model.Only comprise that with well known in the art the air-conditioning system of compressor compares, this composite air conditioner system has increased pumping system on original compressor assembly, to realize at low temperature season, adopts pump to circulate to freeze.
As shown in Figure 1, this air-conditioning system 100 comprises the compressor 10 that is communicated with by pipeline fluid in order, condenser 20, pump 50, throttling arrangement 30(such as electric expansion valve, heating power expansion valve, ball valve, capillary, orifice plate etc.) and evaporimeter 40.Alternatively, can in the pipeline between condenser 20 and pump 50, fluid reservoir 60 be set.In addition, air-conditioning system 100 comprises: the first bypass C1 of bypass compressor 10 is provided with valve c1 in the first bypass C1; The second bypass C2 of bypass pump 50 is provided with valve c2 in the second bypass C2; And the 3rd bypass C3 of bypass throttle device 30, in the 3rd bypass C3, be provided with valve c3.
When outdoor temperature is higher, compressor 10 system operations.Now, by means of valve c1 and c3 and bypass C1 and C3 are closed, by means of valve c2, bypass C2 is opened.Such as the working fluid of cold-producing medium, evaporimeter 40 heat absorption of flowing through becomes steam, through compressor 10 actings, become high temperature and high pressure steam, to condenser 20 heat releases, become after liquid, at throttling arrangement, 30 places realize step-down throttling, finally arrive evaporimeter 40 and complete a compressor assembly kind of refrigeration cycle.The control that the flow of compressor assembly can be undertaken to a certain degree by throttling arrangement 30.When outdoor temperature is lower, pump 50 system operations.Now, bypass C1 and C3 open and bypass C2 closes.The cold-producing medium evaporimeter 40 of flowing through becomes gas by heat in absorption chamber, through bypass C1, arrive condenser 20, through condenser, 20 heat releases become liquid, arrive after fluid reservoir 60, after the vapor-liquid separation of fluid reservoir 60, liquid refrigerant boosts through pump 50, arrives evaporimeter 40 complete a pumping system kind of refrigeration cycle finally by bypass C3.The flow of pumping system controls to mate different indoor set systems by the device (not shown) such as permanent flow valve that are arranged on pipeline mostly, and the flow of pumping system can not regulate automatically with refrigerating capacity.
The weak point of this air-conditioning system 100 is: a) on original compressor assembly, transform, need on compressor assembly, increase a plurality of bypasses and valve, and execute man-hour requirement and at machine room, carry out the operations such as copper pipe welding, pipeline transformation, complicated operation and be unfavorable for computer room safety; B) because cavitation erosion easily appears in pump, need to take the series of measures such as the high fluid reservoir of frame, cause pump cabinet to take volume large; C) pumping system flow is non-adjustable, need to mate separately according to the difference of the refrigerating capacity of compressor assembly labor intensive material resources.
In order to solve one or more problems of above-mentioned air-conditioning system 100, made the utility model.Describe below with reference to accompanying drawings structure and the principle of the air-conditioning system of each embodiment of the present utility model in detail.
Embodiment 1
Below with reference to Fig. 2-9, describe according to the structure of the air-conditioning system of the first embodiment of the present utility model and principle.
As shown in Figure 2, air-conditioning system 100A comprises the compressor 10 that connects by pipeline fluid in order, condenser 20, pump 50, throttling arrangement 30(such as electric expansion valve, heating power expansion valve, ball valve, capillary, orifice plate etc.) and evaporimeter 40.More specifically, the outlet 14 of compressor 10 is connected with the entrance 22 of condenser 20 by pipeline L1, the outlet 24 of condenser 20 is connected with the entrance 52 of pump 50 by pipeline L2, the outlet 54 of pump 50 is connected with throttling arrangement 30 by pipeline L3, throttling arrangement 30 is connected with the entrance 42 of evaporimeter 40 by pipeline L4, and the outlet 44 of evaporimeter 40 is connected with the entrance 12 of compressor 10 by pipeline L5.Preferably, pump 50 can be the adjustable pump of flow, for example variable frequency pump or pressure regulating pump.Further preferably, the flow of throttling arrangement 30 also can regulate, and is preferably electric expansion valve or heating power expansion valve.
In addition, air-conditioning system 100A comprises the degree of superheat checkout gear SH of the degree of superheat of the working fluid in detection system.In the example of Fig. 2, the temperature sensor T of the temperature for detection of the working fluid in pipeline that degree of superheat checkout gear SH can be in the pipeline L5 being arranged between evaporimeter 40 and compressor 10 and forming for detection of the pressure sensor P1 of the pressure of the working fluid in pipeline.It should be appreciated by those skilled in the art that and can utilize known algorithm or mapping by the degree of superheat of the detection data acquisition air-conditioning system of temperature sensor T and pressure sensor P1.Those skilled in the art be also to be understood that the degree of superheat that can adopt other any any means known to carry out detection system, so degree of superheat checkout gear can also consist of other sensors or other checkout gears.In this example, preferably detect the degree of superheat of the working fluid in the pipeline L5 between evaporimeter 40 and compressor 10, particularly preferably detect the degree of superheat at entrance 12 places of compressor 10.But those skilled in the art should understand that the degree of superheat that also can detect other positions, for example the outlet 44 of evaporimeter 40, the entrance 22 of the outlet 14 of compressor 10, condenser 20 or compressor 10 to the degree of superheat of any position on the pipeline L1 between condenser 20.
Alternatively, air-conditioning system 100A can also comprise the pressure sensor P2 of inlet pressure of testing pump 50 and the pressure sensor P3 of the outlet pressure of testing pump 50.
Air-conditioning system 100A further comprises the control device 200 by for example electronic control unit, controller or control circuit form.Particularly, control device 200 can constituting by hardware and software.Control device 200 can for example, receive data and can be at least one output order in compressor 10, condenser 20, pump 50, throttling arrangement 30 and evaporimeter 40 to control the running of whole air-conditioning system from being arranged on various sensors air-conditioning system 100A (temperature sensor T, pressure sensor P1, P2 and P3).
Next the control procedure of air-conditioning system 100A of the present utility model is described with reference to Fig. 3.
First, at step S10, the air-conditioning system 100A operation of starting shooting.At step S12, by being for example positioned at indoor temperature sensor (not shown) and being positioned at outdoor temperature sensor (not shown), detect indoor temperature and outdoor temperature, and these detected values can be transferred to control device 200.At step S14, the indoor temperature that control device 200 obtains by step S12 and outdoor temperature are calculated indoor/outdoor temperature-difference △ T(now, and control device can form the poor determining device of indoor and outdoor temperature in the utility model) and judge whether this indoor/outdoor temperature-difference △ T is greater than predetermined value T1.
Hereinafter, by air-conditioning system 100A in compressor 10 operation and pump 50 operations or the state that do not move are referred to as compressor assembly, and by air-conditioning system 100A in compressor 10 shutdown and the state of pump 50 operations is referred to as pumping system.
When indoor/outdoor temperature-difference △ T is less than or equal to T1, control device 200 sends instruction to allow compressor 10 system operations, as shown in step S20.Now, control device 200 can send instruction to allow pump 50 open or pump 50 cuts out to pump 50.When pump 50 is opened, pump 50 can be assisted the adjusting of carrying out flow, also can reduce pipe resistance simultaneously, reduces compressor wasted work.When pump 50 cuts out, pump 50 can only be equivalent to a flow-through element in system.It is example that the pump 50 of take is opened, liquid refrigerant absorbs heat in evaporimeter 40, room air is cooling, cold-producing medium after evaporation is inhaled into compressor 10, becomes the steam of HTHP through compressor acting, and gaseous refrigerant enters after condenser 20, through lowering the temperature with the heat exchange of outside air, become liquid, from the condenser 20 cold-producing medium out arrival throttling arrangement 30 pump 50 of flowing through, after throttling arrangement 30 step-down throttlings, enter evaporimeter 40, complete a compressor cooling circulation.
In compressor assembly running, the degree of superheat a of degree of superheat checkout gear SH detection system and send signal to control device 200, as shown in step S22.At step S24, whether the degree of superheat a that control device 200 judgements detect meets the requirement (being whether degree of superheat a is in second preset range P～Q) of compressor assembly.When degree of superheat a meets requiring of compressor assembly, the compressor assembly operation of remaining stationary, as shown in step S26.And when degree of superheat a does not meet requiring of compressor assembly, the flow of regulating system, as shown in step S28, after this proceeds the judgement of step S24.
More specifically, the control of the degree of superheat a of compressor assembly as shown in Figure 4: at step S241, when degree of superheat a meets compressor assembly requirement,, when P≤a≤Q, system operation situation is good, so maintain the operation of system original state as step S26; Otherwise, as shown at step S242, when a > Q, enter step S282, by the flow of the increase systems such as frequency controlling the aperture of throttling arrangement or increase pump to reduce the degree of superheat; And when a < P, enter step S281, by the frequency etc. of controlling throttling arrangement or reducing pump, reduce flow system flow to increase the degree of superheat.Thus, make the degree of superheat of system in best scope, the cold that has guaranteed system can mate optimum flow and make the efficiency that system held is higher.
Return to Fig. 3, when when step S14 control device 200 judgement indoor/outdoor temperature-difference △ T are greater than T1, control device 200 sends instruction to allow pump 50 system operations, as shown in step S30.Now, control device 200 can send instruction so that compressor 10 cuts out to compressor 10.Now, liquid refrigerant absorbs heat in evaporimeter 40, and room air is cooling; From evaporimeter 40 cold-producing medium out flow through compressor 10(now compressor 10 only as a flow-through element) arrive condenser 20; Heat exchange cold-producing medium through condenser 20 becomes liquid; After pump 50 actings, refrigerant pressure gets a promotion, and degree of supercooling is increased; From pump 50 high pressure low temperature cold-producing medium out, through throttling arrangement, 30 step-down throttlings enter evaporimeter 40, complete a pumping system kind of refrigeration cycle.
In pumping system running, the degree of superheat a of degree of superheat checkout gear SH detection system and send signal to control device 200, as shown in step S32.At step S34, whether the degree of superheat a that control device 200 judgement detects meets the requirement (that is, degree of superheat a whether in first preset range R～S) of pumping system.When degree of superheat a meets requiring of pumping system, the pumping system operation of remaining stationary, as shown in step S36.And when degree of superheat a does not meet requiring of pumping system, the flow of regulating system, as shown in step S38, after this proceeds the judgement of step S34.
More specifically, the control of the degree of superheat a of pumping system as shown in Figure 6: at step S341, when degree of superheat a meets pumping system requirement,, when R≤a≤S, system operation situation is good, so maintain the operation of system original state as step S36; Otherwise, as shown at step S342, when a > S, enter step S382, by the flow of the increase systems such as frequency controlling the aperture of throttling arrangement or increase pump to reduce the degree of superheat; And when a < R, enter step S381, by the frequency etc. of controlling throttling arrangement or reducing pump, reduce flow system flow to increase the degree of superheat.Thus, make the degree of superheat of system in best scope, the cold that has guaranteed system can mate optimum flow and make the efficiency that system held is higher.
Particularly, when pumping system starts to start, can shown in Fig. 5 A and Fig. 5 B, to pumping system, control.Wherein the transverse axis of Fig. 5 A represents the time and the longitudinal axis represents flow, and the transverse axis of Fig. 5 B represents the time and the longitudinal axis represents the degree of superheat.At the initial t0 starting in the time, by throttling arrangement 30 being controlled or is increased the frequency of pump 50, make flow system flow with given pace, increase gradually (as shown in Figure 5A) since 0, degree of superheat a reduces gradually from infinity simultaneously, until degree of superheat a is decreased to a0(R≤a0≤S) (as shown in Figure 5 B).Because now the flow Q0 of system has reached the optimum Match with refrigerating capacity, so keep flow no longer to change, system is no longer moved, and the now startup of pump completes, and system enters pump operation state.In addition, the cavitation erosion that large flow attack when this startup control method of pumping system has avoided pump to open preferably causes, so the risk of pump cavitation greatly reduce, thereby can move more safely and reliably.After this, in pump operation, can carry out with reference to the control flow described in Fig. 6.
Above-mentioned the first preset range and the second preset range (being the value of P, Q, R, S) can be set to difference, and can arrange according at least one in the parameters such as efficiency of returning liquid status, system of the cold requiring such as user, compressor.
Alternatively, in pumping system running, can to pump 50, protect with reference to the flow process shown in Fig. 7.Particularly, the detection data (step S300) that control device 200 receives from pressure sensor P2 and P3, and detect data acquisition pump lift P3-P2(step S310 by these).When lift P3-P2 is in the 3rd preset range M～N when (that is, M≤P3-P2≤N), pump 50 operation (step S330) of remaining stationary.If lift P3-P2 is greater than the upper limit N of the 3rd preset range, 200 pairs of pumps of control device 50 are carried out high voltage protective (step S340).If lift P3-P2 is less than the lower limit M of the 3rd preset range, 200 pairs of pumps of control device 50 are carried out low-voltage variation (step S320).Alternately, can with the flow band of pump, replace above-mentioned lift to protect control to pump.For example as shown in Figure 8, can pass through the flow L(step S400 of flow sensor testing pump), and judge that whether flow L is in the 4th preset range U～V(step S410).When flow L is in the 4th preset range U～V when (that is, U≤L≤V), pump 50 operation (step S430) of remaining stationary.If flow L is greater than the upper limit V of the 4th preset range, 200 pairs of pumps of control device 50 are carried out high flow capacity protection (step S440).If flow L is less than the lower limit U of the 4th preset range, 200 pairs of pumps of control device 50 are carried out low discharge protection (step S420).
Above, described according to the degree of superheat detecting the flow of pumping system and/or compressor assembly has been regulated, wherein the adjusting of flow is except the aperture of the flow by adjusting pump and control throttling arrangement, also can be accomplished in several ways, as come adjust flux, resistance (as controlled by device) by regulating system to carry out adjust flux, adjust flow by methods such as software controls (as by the flow of correspondence under software control different load and indoor/outdoor temperature-difference) by increasing the bypass of pump.
In addition, to the monitoring of the degree of superheat and control, also can take various ways to realize:
First, such as the degree of superheat that can detect evaporator outlet, suction port of compressor, compressor outlet etc. and locate (being positioned at all detectable position on indoor pipeline) before from evaporator outlet to condenser inlet, then according to detected value according to control logic control system flow.By the control to the degree of superheat, the gas of the compressor that can guarantee to flow through is overheated gas, has also guaranteed the refrigerating capacity of system when avoiding compressor to produce liquid hammer.
Second, can also control in the following way the degree of superheat: 1) change SR, as realized the variation of system pressure, thereby reach the variation of refrigerant flow, the variation of the degree of superheat by changing (by the change of valve member or pipeline, reaching the variation of the SR) measures such as electrical ball valve; 2) change refrigerant temperature, as change compressor heating tape add the variation that heat is realized refrigerant temperature, thereby reach the variation of the degree of superheat.
The 3rd, to the detection of the degree of superheat and control, also can be undertaken by throttling arrangement.
Compare with the air-conditioning system shown in Fig. 1, according to the air-conditioning system of the utility model the first embodiment, can have the following advantages by tool.
(1) by the application degree of superheat, control, can remove numerous bypasses and valve (example is bypass C1, C2, C3 and valve c1, c2 and c3 as shown in Figure 1) to simplify System Construction, the work on the spot amount while reducing original system to transform.More specifically, owing to having controlled the degree of superheat of system, thus can guarantee that suction port of compressor always sucks overheated gas and on-liquid, thus prevented the liquid hammer of compressor, thus can save the bypass C1 to compressor shown in Fig. 1.Therefore, in the situation that having simplified System Construction, still can maintain higher system reliability and security.
(2) by the flow of system being controlled according to the degree of superheat of system, air-conditioning system of the present utility model has realized than the Intelligent Matching of the more excellent flow of system shown in Figure 1 and refrigerating capacity, and can make the operation of compressor assembly and pumping system more efficient and safe and reliable.
(3) by detecting and control the degree of superheat, for example, by controlling the degree of superheat of evaporator outlet, can effectively reduce the charging amount of cold-producing medium.Test result shows, when evaporator outlet occurs back after liquid, the refrigerant charge of system can increase considerably.For example, on the unit of a 55kw, the refrigerant charge of the system of the control degree of superheat is than the refrigerant charge few 30% of not controlling the system of the degree of superheat.
(4) by the entrance and exit at pump, checkout equipment is set with the state parameter (as the pressure reduction between the entrance and exit of pump or flow) of the entrance and exit of testing pump; and by the pump safe operation parameter of detected value and setting is compared, when detected value is outside safe operation parameter area, can protect pump.Thereby ensured the safe operation of pump, improved the reliability of system.
(5) flow of system is in real time adjustable.One side is regulating system flow in several ways, and when pumping system starts, refrigerant flow increases with given pace from small to large, until reach system settings, can avoid the cavitation erosion of circulating pump when opening.When pumping system normally moves, by intelligent regulating system running status, make the coupling of flow system flow and refrigerating capacity keep best, reduce wasted work, strengthen the reliability of system.On the other hand, the employing of variable delivery pump makes with identical pump module, to be equipped with different indoor set systems, has simplified production and design process.As shown in Figure 9, it shows the corresponding refrigerating capacity of different flow under different outdoor temperatures (17 ℃, 15 ℃, 12 ℃).As can be seen from Figure 9, in the situation that outdoor temperature is identical, be not that the larger refrigerating capacity of flow is larger, different operating modes is to there being the flow of an optimum.Therefore, variable flow can guarantee that system, constantly in best flow, has guaranteed the refrigerating capacity of system and improved efficiency.
(6), in air-conditioning system of the present utility model, when indoor/outdoor temperature-difference is larger, can only open pumping system (now compressor assembly is closed), thereby can when guaranteeing refrigerating capacity, significantly reduce the energy consumption of system.
Below with reference to Figure 10, describe according to the air-conditioning system 100B of the utility model the second embodiment.In Figure 10, adopted and referred to identical parts with Reference numeral identical in Fig. 2 and omitted control device 200 and be connected with the circuit between miscellaneous part.In the present embodiment, no longer repeat the description of same parts.
The second embodiment is with respect to the difference of the first embodiment: in the second pipeline L2 between condenser 20 and pump 50, be provided with fluid reservoir 60.Therefore, the cold-producing medium that does not on a small quantity become liquid completely through condenser 20 heat exchange can carry out vapor-liquid separation in fluid reservoir 60, and liquid refrigerant is because weight distribution is in fluid reservoir 60 bottoms, makes to ensure all the time in fluid reservoir 60 certain liquid refrigerant.In addition, fluid reservoir 60 can be arranged on position higher than pump 50 to form certain difference in height (system of being provides certain pressure reduction) between fluid reservoir 60 and pump 50, to reduce pump 50 cavitation erosion possibilities.In addition, when pump 50 moves under different operating modes, the operation of compressor 10 etc. causes the best refrigerant charge of system different, can utilize liquid storage to fill with 60 and guarantee that the refrigerant amount in condenser 20 and evaporimeter 40 remains best.
Embodiment 3
Below with reference to Figure 11, describe according to the air-conditioning system 100C of the utility model the 3rd embodiment.In Figure 11, adopted and referred to identical parts with Reference numeral identical in Fig. 2 and omitted control device 200 and be connected with the circuit between miscellaneous part.In the present embodiment, no longer repeat the description of same parts.
The 3rd embodiment is with respect to the difference of the first embodiment: air-conditioning system further comprises the first bypass B1 of bypass pump 50, is provided with Flow-rate adjustment element b1 in the first bypass B1.On the one hand, by by the refrigerant bypass of pump discharge in the pipeline before pump intake, can increase the degree of supercooling of pump intake, prevent the shwoot that SR causes, reduce the possibility of pump cavitation.On the other hand, by controlling Flow-rate adjustment element b1 in bypass B1, can reach the effect that regulates pump discharge.When pump discharge hour, by the aperture of augmented flow regulating element b1, the part of refrigerant bypass of pump discharge is got back in the pipeline before pump intake, has increased pump discharge, thereby reaches the effect of Flow-rate adjustment, has guaranteed cooling system amount.
Embodiment 4
Below with reference to Figure 12, describe according to the air-conditioning system 100D of the utility model the 4th embodiment.In Figure 12, adopted and referred to identical parts with Reference numeral identical in Fig. 2 and omitted control device 200 and be connected with the circuit between miscellaneous part.In the present embodiment, no longer repeat the description of same parts.
The 4th embodiment is with respect to the difference of the first embodiment: air-conditioning system further comprises the second bypass B2 of bypass pump 50, in the second bypass B2, is provided with valve b2.When compressor 10 system operation, the valve b2 in bypass B2 opens.Now, in compressor assembly, from condenser 20 refrigerant liquid out without pump 50 with sensor P2, P3, and arrive throttling arrangement 30 through bypass B2, thus the resistance while having reduced compressor assembly operation.When compressor 10 system closing, the valve b2 in bypass B2 closes.
Embodiment 5
Below with reference to Figure 13, describe according to the air-conditioning system 100E of the utility model the 5th embodiment.In Figure 13, adopted and referred to identical parts with Reference numeral identical in Figure 10 and 11 and omitted control device 200 and be connected with the circuit between miscellaneous part.In the present embodiment, no longer repeat the description of same parts.
In the present embodiment, the fluid reservoir 60 in the second embodiment shown in simultaneously integrated Figure 10 and the first bypass B1 and the Flow-rate adjustment element b1 in the 3rd embodiment shown in Figure 11 in air-conditioning system.Therefore, can realize the additional advantage of the second embodiment and the 3rd embodiment simultaneously.
Embodiment 6
Below with reference to Figure 14, describe according to the air-conditioning system 100F of the utility model the 6th embodiment.In Figure 14, adopted and referred to identical parts with Reference numeral identical in Figure 11 and 12 and omitted control device 200 and be connected with the circuit between miscellaneous part.In the present embodiment, no longer repeat the description of same parts.
In the present embodiment, the second bypass B2 and valve b2 in the first bypass B1 in the 3rd embodiment shown in simultaneously integrated Figure 11 and the 4th embodiment shown in Flow-rate adjustment element b1 and Figure 12 in air-conditioning system.Therefore, can realize the additional advantage of the 3rd embodiment and the 4th embodiment simultaneously.
Embodiment 7
Below with reference to Figure 15, describe according to the air-conditioning system 100G of the utility model the 7th embodiment.In Figure 15, adopted and referred to identical parts with Reference numeral identical in Figure 10 and 12 and omitted control device 200 and be connected with the circuit between miscellaneous part.In the present embodiment, no longer repeat the description of same parts.
In the present embodiment, the second bypass B2 and valve b2 in the fluid reservoir 60 in the second embodiment shown in simultaneously integrated Figure 10 and the 4th embodiment shown in Figure 12 in air-conditioning system.Therefore, can realize the additional advantage of the second embodiment and the 4th embodiment simultaneously.
Embodiment 8
Below with reference to Figure 16, describe according to the air-conditioning system 100H of the utility model the 8th embodiment.In Figure 16, adopted and referred to identical parts with Reference numeral identical in Figure 10, Figure 11 and 12 and omitted control device 200 and be connected with the circuit between miscellaneous part.In the present embodiment, no longer repeat the description of same parts.
In the present embodiment, the second bypass B2 and valve b2 in fluid reservoir 60, the first bypass B1 in the 3rd embodiment shown in Figure 11 and the 4th embodiment shown in Flow-rate adjustment element b1 and Figure 12 in the second embodiment shown in simultaneously integrated Figure 10 in air-conditioning system.Therefore, can realize the additional advantage of the second embodiment, the 3rd embodiment and the 4th embodiment simultaneously.
Although described various embodiment of the present utility model in detail at this, but should be appreciated that the utility model is not limited to the specific embodiment of describing in detail and illustrating here, in the situation that not departing from essence of the present utility model and scope, can be realized by those skilled in the art other modification and variant.All these modification and variant all fall in scope of the present utility model.And all members described here can be replaced by the member being equal in other technologies.
Claims (29)
1. air-conditioning system (100A, 100B, 100C, 100D, 100E, 100F, 100G, 100H), is characterized in that comprising:
Compressor (10);
Via the first pipeline, be connected to the condenser (20) in described compressor (10) downstream;
Via the second pipeline, be connected to the pump (50) in described condenser (20) downstream;
Via the 3rd pipeline, be connected to the throttling arrangement (30) in described pump (50) downstream;
Via the 4th pipeline, be connected to the evaporimeter (40) in described throttling arrangement (30) downstream, described evaporimeter (40) is connected with described compressor (10) via the 5th pipeline;
For obtaining the degree of superheat checkout gear (SH) of the degree of superheat of described air-conditioning system; And
Control device (200), the degree of superheat that described control device (200) obtains according to described degree of superheat checkout gear (SH) flow of described air-conditioning system is controlled so that described flow substantially with current working under best cold match.
2. air-conditioning system as claimed in claim 1, further comprises for determining the poor determining device of indoor and outdoor temperature of the temperature difference between indoor temperature and outdoor temperature.
3. air-conditioning system as claimed in claim 2, wherein, when the definite temperature difference of the poor determining device of described indoor and outdoor temperature is greater than predetermined value (T1), described control device is controlled and is made described pump (50) move and make described compressor (10) to shut down.
4. air-conditioning system as claimed in claim 3, the degree of superheat wherein obtaining when described degree of superheat checkout gear is in the first preset range (R～S) time, and described control device maintains the running of described air-conditioning system; And the degree of superheat obtaining when described degree of superheat checkout gear is outside described the first preset range (R～S) time, and described control device regulates the flow of described air-conditioning system.
5. air-conditioning system as claimed in claim 4, wherein when described pump (50) starts to start, described control device is controlled described pump (50) or described throttling arrangement (30) and is made the flow of described air-conditioning system be increased to gradually predetermined amount of flow (Q0) since 0 to make the degree of superheat of described air-conditioning system within described the first preset range (R～S).
6. air-conditioning system as claimed in claim 4, when the degree of superheat wherein obtaining when described degree of superheat checkout gear is greater than the upper limit (S) of described the first preset range (R～S), described control device increases the flow of described air-conditioning system, and when the degree of superheat of described degree of superheat checkout gear acquisition is less than the lower limit (R) of described the first preset range (R～S), described control device reduces the flow of described air-conditioning system.
7. air-conditioning system as claimed in claim 4, wherein said control device regulates the flow of described air-conditioning system by controlling the flow of described pump (50) or the aperture of described throttling arrangement (30).
8. air-conditioning system as claimed in claim 3, wherein, when the definite temperature difference of the poor determining device of described indoor and outdoor temperature is less than or equal to described predetermined value (T1), described control device is controlled and is made described compressor (10) operation.
9. air-conditioning system as claimed in claim 8, wherein, in described compressor (10) operation, described pump (50) is shut down.
10. air-conditioning system as claimed in claim 8, the degree of superheat wherein obtaining when described degree of superheat checkout gear is in the second preset range (P～Q) time, and described control device maintains the running of described air-conditioning system; And the degree of superheat obtaining when described degree of superheat checkout gear is outside described the second preset range (P～Q) time, and described control device regulates the flow of described air-conditioning system.
11. air-conditioning systems as claimed in claim 10, when the degree of superheat wherein obtaining when described degree of superheat checkout gear is greater than the upper limit (Q) of described the second preset range (P～Q), described control device increases the flow of described air-conditioning system, and when the degree of superheat of described degree of superheat checkout gear acquisition is less than the lower limit (P) of described the second preset range (P～Q), described control device reduces the flow of described air-conditioning system.
12. air-conditioning systems as claimed in claim 11, wherein said control device regulates the flow of described air-conditioning system by controlling the aperture of described throttling arrangement (30).
13. air-conditioning systems as claimed in claim 11, wherein, in described compressor (10) operation, described pump (50) also moves.
14. air-conditioning systems as claimed in claim 13, wherein said control device regulates the flow of described air-conditioning system by controlling the flow of described pump (50) or the aperture of described throttling arrangement (30).
15. air-conditioning systems as claimed in claim 1, wherein said degree of superheat checkout gear is arranged in described the first pipeline or described the 5th pipeline.
16. air-conditioning systems as claimed in claim 15, wherein said degree of superheat checkout gear is arranged on the porch of described compressor (10).
17. air-conditioning systems as claimed in claim 1, wherein said degree of superheat checkout gear comprises for detection of the temperature sensor (T) of the temperature of working fluid with for detection of first pressure sensor (P1) of the pressure of working fluid.
18. air-conditioning systems as claimed in claim 1, wherein said pump (50) is the adjustable pump of flow.
19. air-conditioning systems as claimed in claim 1, wherein said pump (50) is variable frequency pump or pressure regulating pump.
20. air-conditioning systems as claimed in claim 1; wherein in the porch of described pump (50), be provided with the second pressure sensor (P2); in the exit of described pump (50), be provided with the 3rd pressure sensor (P3); and when the pressure differential between described the second pressure sensor and described the 3rd pressure sensor is outside the 3rd preset range (M～N), described control device is protected described pump (50).
21. air-conditioning systems as claimed in claim 1; wherein in the porch of described pump (50), be provided with second quantity sensor; in the exit of described pump (50), be provided with the 3rd flow sensor; and when the difference in flow between described second quantity sensor and described the 3rd flow sensor is outside the 4th preset range (U～V), described control device is protected described pump (50).
22. air-conditioning systems as described in any one in claim 1-21, are wherein provided with fluid reservoir (60) in the second pipeline between described condenser (20) and described pump (50).
23. air-conditioning systems as claimed in claim 22, further comprise first bypass (B1) of pump (50) described in bypass, are provided with Flow-rate adjustment element (b1) in described the first bypass (B1).
24. air-conditioning systems as claimed in claim 22; further comprise second bypass (B2) of pump (50) described in bypass; in described the second bypass (B2), be provided with valve (b2), described valve (b2) is configured to open when described compressor (10) moves and cuts out when described compressor (10) is shut down.
25. air-conditioning systems as claimed in claim 23; further comprise second bypass (B2) of pump (50) described in bypass; in described the second bypass (B2), be provided with valve (b2), described valve (b2) is configured to open when described compressor (10) moves and cuts out when described compressor (10) is shut down.
26. air-conditioning systems as described in any one in claim 1-21, further comprise first bypass (B1) of pump (50) described in bypass, are provided with Flow-rate adjustment element (b1) in described the first bypass (B1).
27. air-conditioning systems as claimed in claim 25, wherein said control device is controlled described Flow-rate adjustment element (b1) to regulate the flow of described air-conditioning system.
28. air-conditioning systems as claimed in claim 26; further comprise second bypass (B2) of pump (50) described in bypass; in described the second bypass (B2), be provided with valve (b2), described valve (b2) is configured to open when described compressor (10) moves and cuts out when described compressor (10) is shut down.
29. air-conditioning systems as described in any one in claim 1-21; further comprise second bypass (B2) of pump (50) described in bypass; in described the second bypass (B2), be provided with valve (b2), described valve (b2) is configured to open when described compressor (10) moves and cuts out when described compressor (10) is shut down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320242682.8U CN203501316U (en) | 2013-05-08 | 2013-05-08 | Air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320242682.8U CN203501316U (en) | 2013-05-08 | 2013-05-08 | Air conditioning system |
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| CN203501316U true CN203501316U (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320242682.8U Expired - Lifetime CN203501316U (en) | 2013-05-08 | 2013-05-08 | Air conditioning system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104142031A (en) * | 2013-05-08 | 2014-11-12 | 艾默生网络能源有限公司 | Air conditioning system and control method thereof |
| CN106461285A (en) * | 2014-04-25 | 2017-02-22 | 株式会社瑞蓝 | Cryogenic refrigeration system |
-
2013
- 2013-05-08 CN CN201320242682.8U patent/CN203501316U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104142031A (en) * | 2013-05-08 | 2014-11-12 | 艾默生网络能源有限公司 | Air conditioning system and control method thereof |
| CN104142031B (en) * | 2013-05-08 | 2017-02-08 | 艾默生网络能源有限公司 | Air conditioning system and control method thereof |
| CN106461285A (en) * | 2014-04-25 | 2017-02-22 | 株式会社瑞蓝 | Cryogenic refrigeration system |
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