CN101078583A - Air conditioner capable of adjusting cold medium flux and its regulation method - Google Patents
Air conditioner capable of adjusting cold medium flux and its regulation method Download PDFInfo
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- CN101078583A CN101078583A CN 200610013847 CN200610013847A CN101078583A CN 101078583 A CN101078583 A CN 101078583A CN 200610013847 CN200610013847 CN 200610013847 CN 200610013847 A CN200610013847 A CN 200610013847A CN 101078583 A CN101078583 A CN 101078583A
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Abstract
The invention relates to an air conditioner with adjusting refrigerant flow and the adjusting method. The air conditioner comprises compressor for compressing refrigerant, a first heat exchanger for condensing refrigerant from the compressor, expander for decompressing refrigerant supplied by the first heat exchanger, a second heat exchanger for vaporizing refrigerant from the expander, and adjusting device of refrigerant flow for adjusting refrigerant flow, connected between the outlet piping of the first heat exchanger and the inlet piping of the second heat exchanger so as to compose parallel connection relation with the expander. The adjusting method comprises compressing refrigerant, condensing compressed refrigerant by heat exchanging, decompressing and expanding condensed refrigerant and vaporizing expanded refrigerant by heat exchanging. The invention can prevent frost at the position of inlet piping of heat exchanger used by evaporator and make cycling refrigerant in air conditioner maintain appropriate flow to prevent frosting problem generated by the shortage of cycling refrigerant.
Description
Technical field
The present invention relates to a kind of air-conditioner and control method thereof of regulating cold medium flux.
Background technology
In general, air-conditioner is to be installed on vehicle or office or family etc. the indoor space or metope, and to the indoor cooling-heating room device that carries out cold-room or greenhouse operation.Above-mentioned air-conditioner can be divided into substantially: the detachable air conditioner that the outside of outdoor mounted and the indoor of indoor installation are separated from each other; Outside and indoor constitute the integral air conditioner of one.
Include the structure member that constitutes by compressor-condenser-expander-evaporimeter in the above-mentioned air-conditioner substantially, as the refrigerant of working fluid will continue to compress, the variation of condensation, expansion, evaporation, and circulate.
In particular, the refrigerant (low-temp low-pressure gaseous coolant) of the dry saturated steam condition of the low-temp low-pressure of discharging from evaporimeter and flowing into will carry out adiabatic compression in compressor, and with the refrigerant (HTHP gaseous coolant) of the superheated steam state of boil down to HTHP.
The refrigerant (HTHP gaseous coolant) of superheated steam state that flow into the HTHP of condenser from above-mentioned compressor will be emitted condensation latent heat condenser, and will be converted to the refrigerant (HTHP liquid refrigerant) of the saturated liquid state of HTHP, and flow in the expander.
The refrigerant of the saturated liquid state of above-mentioned HTHP (the liquid refrigerant of HTHP) will carry out isenthalpic expansion (isenthalpic expansion) in expander, and will be converted to the liquid refrigerants of low-temp low-pressure, flow in the evaporimeter then.
Flow into the liquid refrigerants of the low-temp low-pressure of evaporimeter from above-mentioned expander, will be converted to the refrigerant (low-temp low-pressure gaseous coolant) of the dry saturated steam condition of low-temp low-pressure through endothermic process, thereby will proceed above-mentioned cyclic process.
As mentioned above, the air-conditioner of circulation that is used to carry out compression, condensation, expansion, the evaporation of refrigerant will can be used as cold-room or the greenhouse device uses.Wherein, when using as the greenhouse device, when utilizing the HTHP gaseous coolant that flows in the condenser to be converted to the liquid refrigerant of HTHP, the condensation latent heat of emitting towards periphery; When using, the liquid refrigerants that utilizes the low-temp low-pressure that flows in the evaporimeter is converted to the gaseous coolant of low-temp low-pressure, and absorbs heat on every side as cold house device.
Below, with reference to the accompanying drawings 1, the cooling-heating room circulation of air-conditioner is described in detail.
As shown in Figure 1, include compressor the 110, the 1st heat exchanger 120, expander the 140, the 2nd heat exchanger 130 that is used to carry out basic functions such as compression, condensation, expansion, evaporation in the air-conditioner.And, be provided with as other device is additional: select operation according to cooling-heating room, and the cross valve 150 (4 way valve) of the circulating path of change refrigerant; Be used to filter the reservoir 160 of liquid refrigerants; Be used to detect the temperature sensor 170 of temperature of the output pipe arrangement of the 2nd heat exchanger 130.
At this, for the basic operation of air-conditioner is described, schematic representations goes out the basic structure of air-conditioner among Fig. 1.And the 1st and the 2nd heat exchanger 120,130 when greenhouse is operated, is carried out the function of condensation, evaporation respectively under the control of cross valve 150; When cold-room is operated, carry out the function of evaporation, condensation respectively.
Below, will describe the corresponding running of cooling-heating room operation.
At first, operation describes to greenhouse.
When carrying out the greenhouse operation, the gaseous coolant of compressor 110 compression low-temp low-pressures, and compressing and converting is the gaseous coolant of HTHP, the gaseous coolant of the HTHP of compression in above-mentioned compressor 110, to flow in the cross valve 150, the gaseous coolant of the HTHP that flows in the above-mentioned cross valve 150 will be by the guiding of valve 153, and flow in the 1st heat exchanger 120.
The gaseous coolant of the HTHP that flows in above-mentioned the 1st heat exchanger 120 will contact with colder room air, and is converted into the liquid refrigerants of HTHP, and at this moment, the latent heat that generates in the above-mentioned conversion operation will be emitted to indoor, and play the greenhouse effect.
Then, the liquid refrigerants of the HTHP of condensation in above-mentioned the 1st heat exchanger 120, to flow in the expander 140, above-mentioned expander 140 is the devices that are used for the pairing suitable refrigerant of load change is supplied to the 2nd heat exchanger 130, and the liquid refrigerants of the HTHP that above-mentioned the 1st heat exchanger 120 is supplied with is converted to the liquid refrigerants of low-temp low-pressure, and is sent in the 2nd heat exchanger 130.
Supply to the liquid refrigerants of the low-temp low-pressure of the 2nd heat exchanger 130 from above-mentioned expander 140, will absorb heat from extraneous air, and will be converted to the gaseous coolant of low-temp low-pressure, and evaporate.At this moment, the above-mentioned extraneous air that is absorbed heat will be discharged to the outside by fan (not shown).
Then, supply to the gaseous coolant of the low-temp low-pressure of cross valve 150, will flow into valve 151, will supply in the reservoir 160 by valve 152 subsequently from above-mentioned the 2nd heat exchanger 130.
Above-mentioned reservoir 160 is to be used for separating the liquid refrigerants of low-temp low-pressure and the device of storage from the refrigerant that the 2nd heat exchanger 130 is supplied with.As everyone knows, be fed directly to when liquid refrigerants under the situation of compressor 110, the phenomenon that machine oil is filled (forming) will take place, and may cause compressor to sustain damage.At this, utilize above-mentioned reservoir 160 from above-mentioned refrigerant, to separate liquid refrigerants.
Then, the gaseous coolant of the low-temp low-pressure by above-mentioned reservoir 160 will flow in the compressor 110, and circulation is proceeded in cycling as described above.
Below, will describe the cold-room operation.
In the cold-room operation, as long as the effect of change the 1st and the 2nd heat exchanger 120,130, the operation of its integral body is identical with above-mentioned greenhouse operation.That is, when carrying out the cold-room operation, the 2nd heat exchanger 130 will play the effect of condenser, and the 1st heat exchanger 120 then plays the effect of evaporimeter.At this moment, function by above-mentioned cross valve 150 adjustings the above-mentioned the 1st and the 2nd heat exchanger 120,130, refrigerant by above-mentioned compressor 110, will be along the 2nd heat exchanger 130-expander 140-the 1st heat exchanger 120-(reservoir 160)-compressor 110 circulates, and the process of carrying out condensation-expansion-evaporation-compression.
Identical with above-mentioned greenhouse operation, the refrigerant that flows into by cross valve 150 from the 1st heat exchanger 120, above-mentioned reservoir 160 is used for preventing that the liquid refrigerants that above-mentioned the 1st heat exchanger 120 does not obtain evaporating from flowing in the above-mentioned compressor 110.
But, when stating the existing air-conditioner of general structure in the use, particularly under the situation about using as the greenhouse device, play on the porch pipe arrangement of 2 heat exchangers 130 of evaporator function, the frosting phenomenon that generates frost and pile up takes place usually.
In the case, in the process of greenhouse operation, carry out the contrary cycling of refrigerant,, carry out the defrost operation of removing frost by the contrary cyclic process of above-mentioned refrigerant.
But the above-mentioned defrost operation of carrying out repeatedly will cause significantly reducing the greenhouse ability of air-conditioner.
Summary of the invention
Technical problem underlying to be solved by this invention is, overcome the defective that existing technology exists, and provide a kind of air-conditioner and control method thereof of regulating cold medium flux, the phenomenon of frosting takes place with the pipe arrangement place, gateway of the heat exchanger that prevents to use as evaporimeter, and make the refrigerant that in air-conditioner, circulates keep suitable flow, the frosting problem that causes thereby the refrigerant of prevention circulation is very few.
The air-conditioner that the present invention can regulate cold medium flux is:
A kind of air-conditioner of regulating cold medium flux is characterized in that, it includes following several sections: the compressor that is used for compression refrigerant; The 1st heat exchanger that the above-mentioned refrigerant that flows into from above-mentioned compressor is carried out condensation; The expander that the above-mentioned refrigerant that above-mentioned the 1st heat exchanger is supplied with reduces pressure; The 2nd heat exchanger that the above-mentioned refrigerant that flows into from above-mentioned expander is evaporated; Be connected between the inlet pipe arrangement of the outlet pipe arrangement of above-mentioned the 1st heat exchanger and above-mentioned the 2nd heat exchanger, make itself and above-mentioned expander constitute the relation of being connected in parallel, and be used to regulate the cold medium flux adjusting device of the flow of above-mentioned refrigerant.
The aforesaid air-conditioner of regulating cold medium flux wherein includes in the cold medium flux adjusting device: the refrigerant storage facilities that is used to store refrigerant; A part that is used for refrigerant that the outlet pipe arrangement of above-mentioned the 1st heat exchanger is discharged supplies to the 1st branch's pipe arrangement of above-mentioned refrigerant storage facilities; Be used for the refrigerant that above-mentioned refrigerant storage facilities is stored is supplied to the 2nd branch's pipe arrangement of the inlet pipe arrangement of above-mentioned the 2nd heat exchanger.
The aforesaid air-conditioner of regulating cold medium flux wherein also includes in the cold medium flux adjusting device: secondary expander; Above-mentioned secondary expander is connected between the inlet pipe arrangement of above-mentioned the 2nd branch's pipe arrangement and above-mentioned the 2nd heat exchanger, and the refrigerant that supplies to above-mentioned the 2nd heat exchanger from above-mentioned the 2nd branch's pipe arrangement is reduced pressure and expands.
The aforesaid air-conditioner of regulating cold medium flux wherein also includes in the cold medium flux adjusting device: the 1st electronics open and close valve that is used to regulate the open and-shut mode of above-mentioned the 1st branch's pipe arrangement; Be used to regulate the 2nd electronics open and close valve of the open and-shut mode of above-mentioned the 2nd branch's pipe arrangement.
The aforesaid air-conditioner of regulating cold medium flux wherein also includes in the cold medium flux adjusting device: the 1st temperature sensor of temperature that is used to detect the inlet pipe arrangement of above-mentioned the 2nd heat exchanger; Be used to detect the 2nd temperature sensor of temperature of the outlet pipe arrangement of above-mentioned the 2nd heat exchanger.
The aforesaid air-conditioner of regulating cold medium flux, the temperature that detects according to above-mentioned the 1st temperature sensor and above-mentioned the 2nd temperature sensor wherein, and the switching of regulating above-mentioned the 1st electronics open and close valve and above-mentioned the 2nd electronics open and close valve is whether.
The aforesaid air-conditioner of regulating cold medium flux, wherein when the temperature of the inlet pipe arrangement of above-mentioned the 2nd heat exchanger be below-2 ℃ the time, will control open above-mentioned the 2nd branch's pipe arrangement of above-mentioned the 2nd electronics open and close valve;
When the temperature of the outlet pipe arrangement of above-mentioned the 2nd heat exchanger is below-2 ℃ the time, will control open above-mentioned the 1st branch's pipe arrangement of above-mentioned the 1st electronics open and close valve.
The cold medium flux control method of air-conditioner of the present invention is:
A kind of cold medium flux control method of air-conditioner is characterized in that, it includes following several steps: (a) step of compression refrigerant; (b) refrigerant of above-mentioned compression is carried out the step of condensation by heat exchange; (c) step that the refrigerant of above-mentioned condensation is reduced pressure and expands; (d) step that the refrigerant of above-mentioned expansion is evaporated by heat exchange; (e) in the process of carrying out above-mentioned compression condensation-expansion-vaporization cycle, when the flow of above-mentioned refrigerant reduces, additional services refrigerant in above-mentioned (d) step when the flow of above-mentioned refrigerant increases, reduces the step of the flow of the refrigerant of supplying with in above-mentioned (c) step.
The cold medium flux control method of aforesaid air-conditioner, wherein in above-mentioned (e) step, when the temperature of the refrigerant of supplying with in above-mentioned (d) step is uniform temperature when following, will be in above-mentioned (d) step the additional services refrigerant; When the temperature of the refrigerant of discharging by above-mentioned (d) step evaporation is above-mentioned uniform temperature when following, will reduce the flow of the refrigerant of supplying with in above-mentioned (c) step.
The present invention can prevent to take place as the pipe arrangement place, gateway of the heat exchanger of evaporimeter use the phenomenon of frosting.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the schematic diagram of the cooling-heating room circulation of general air-conditioner;
Fig. 2 is the schematic diagram that the cooling-heating room of the air-conditioner of the embodiment of the invention circulates;
Fig. 3 is the schematic diagram of the auxiliary refrigerant liquid storage bottle that uses in the embodiment of the invention;
Fig. 4 is the flow chart of the refrigerant control method of the embodiment of the invention under the situation of the refrigerant circular flow deficiency of air-conditioner;
The flow chart of the refrigerant control method that Fig. 5 is the embodiment of the invention under the too much situation of the refrigerant circular flow of air-conditioner.
The number in the figure explanation:
310: 320: the 1 heat exchangers of compressor
350: cross valve 360: reservoir (accumulator)
370,380: TEMP 390: auxiliary refrigerant liquid storage bottle (bomb)
391,392: electronics open and close valve 393: secondary expander
The specific embodiment
At this, the 26S Proteasome Structure and Function of the compressor the 110, the 1st of existing air-conditioner shown in Figure 1 and the 2nd heat exchanger 120,130, expander 140, cross valve 150, practically identical with the structure and the function of the compressor the 310, the 1st of air-conditioner of the present invention shown in Figure 2 and the 2nd heat exchanger 320,330, expander 340, cross valve 350.
Below, will be at the structure of air-conditioner illustrated in fig. 2, and the situation when it is used as the greenhouse device describes.
When carrying out the greenhouse operation, compressor 310 is the gaseous coolant of HTHP with the gaseous coolant compressing and converting of low-temp low-pressure, and the gaseous coolant of the HTHP of compression will flow in the cross valve 350 in above-mentioned compressor 310.Then, the gaseous coolant of the HTHP that flows in the above-mentioned cross valve 350 will be by the guiding of valve 353, and flow in the 1st heat exchanger 320.
The gaseous coolant of the HTHP that flows in above-mentioned the 1st heat exchanger 320, carry out heat exchange with the colder interior space after, condensation is converted into the liquid refrigerants of HTHP.At this moment, the latent heat that generates in the above-mentioned conversion operation will be emitted to indoor, and play the greenhouse effect.
Then, the liquid refrigerants of the HTHP of condensation in above-mentioned the 1st heat exchanger 320, to flow in the expander 340, above-mentioned expander 340 is the devices that are used for the pairing suitable refrigerant of load change is supplied to the 2nd heat exchanger 330, and the liquid refrigerants of the HTHP that above-mentioned the 1st heat exchanger 320 is supplied with is converted to the liquid refrigerants of low-temp low-pressure, then, the liquid refrigerants with above-mentioned low-temp low-pressure is sent in the 2nd heat exchanger 330.
Supply to the liquid refrigerants of the low-temp low-pressure of the 2nd heat exchanger 330 from above-mentioned expander 340, will absorb heat from extraneous air, and will be converted to the gaseous coolant of low-temp low-pressure, and evaporate.At this moment, above-mentionedly be absorbed the extraneous air that heat turns cold and be discharged to the outside by fan (not shown).With different in the prior art, in an embodiment of the present invention, be close to respectively at the inlet pipe arrangement of above-mentioned the 2nd heat exchanger 330 and outlet pipe arrangement and be provided with temperature sensor 380,370, and will detect the temperature of the refrigerant that circulates in inlet pipe arrangements and the outlet pipe arrangement by above-mentioned each temperature sensor 380,370.And according to the switching of said temperature sensor 380,370 detected adjustment electronics open and close valve 391,392 described later whether control part (not shown) will be.
Then, the gaseous coolant of low-temp low-pressure that supplies to cross valve 350 from above-mentioned the 2nd heat exchanger 330 is after flowing into valve 351, to supply in the reservoir 360 by valve 352, above-mentioned reservoir 360 is to be used for separating the liquid refrigerants of low-temp low-pressure and the device of storage from the refrigerant that above-mentioned the 2nd heat exchanger 330 is supplied with.
And, be connected with cold medium flux adjusting device 300 between the inlet pipe arrangement of the outlet pipe arrangement of above-mentioned the 1st heat exchanger 320 and above-mentioned the 2nd heat exchanger 330, above-mentioned cold medium flux adjusting device 300 constitutes the relation of being connected in parallel with above-mentioned expander 340, and is used to regulate the flow along the mobile refrigerant of above-mentioned compression condensation-expansion-vaporization cycle.
As shown in Figure 2, include substantially in the above-mentioned cold medium flux adjusting device 300: as the auxiliary refrigerant liquid storage bottle 390 of the refrigerant storage facilities that is used to store refrigerant; A part that is used for the refrigerant that will discharge from the outlet pipe arrangement of the 1st heat exchanger 320 supplies to the pipe arrangement b of branch, the b ' as the auxiliary refrigerant liquid storage bottle 390 of refrigerant storage facilities; Be used for to supply to the pipe arrangement a of branch, a ' of the inlet pipe arrangement of the 2nd heat exchanger 330 as the refrigerant that the auxiliary refrigerant liquid storage bottle 390 of refrigerant storage facilities is stored.
And, also include in the above-mentioned cold medium flux adjusting device 300: secondary expander 393, it is connected between the inlet pipe arrangement of the above-mentioned pipe arrangement a of branch, a ' and the 2nd heat exchanger 330, and the refrigerant that is used for supplying to the 2nd heat exchanger 330 from the pipe arrangement a of branch, a ' reduces pressure and expands.
In addition, electronics open and close valve 391 has the function of the open and-shut mode of regulating the above-mentioned pipe arrangement a of branch, a '; Electronics open and close valve 392 has the function of the open and-shut mode of regulating the above-mentioned pipe arrangement b of branch, b '.
Fig. 3 is an embodiment of the auxiliary refrigerant liquid storage bottle 390 as the refrigerant storage facilities illustrated in fig. 2.
As shown in Figure 3, include in the above-mentioned auxiliary refrigerant liquid storage bottle 390: the container 31 that is used to store the columnar air-tight state of refrigerant 33; Be installed on the inside of said vesse 31, and the screen pack 32 that the inner space of said vesse 31 is divided up and down.
As shown in the figure, in the container of dividing by above-mentioned screen pack 32 31, be through with the end of the pipe arrangement b of branch in the hole that forms on the arbitrary region on its top, the other end of the above-mentioned pipe arrangement b of branch will be connected in the pipe arrangement b ' of branch by electronics open and close valve 392.Thus, under above-mentioned electronics open and close valve 392 opened state, supply to a part the refrigerant of expander 340, can flow in the auxiliary refrigerant liquid storage bottle 390 by the pipe arrangement b ' of branch, b from the 1st heat exchanger 320.
And, in the container of dividing by above-mentioned screen pack 32 31, be through with the end of the pipe arrangement a of branch in the hole that forms on the arbitrary region of its underpart.Thus, the refrigerant by the above-mentioned pipe arrangement a of branch discharges opens and closes under valve 391 opened state at electronics, will supply in the secondary expander 393 by the pipe arrangement a ' of branch.
In the basic operation circulation of Fig. 2 and air-conditioner of the present invention shown in Figure 3, that is, compression condensation-expansion-vaporization cycle is compared with the operation cycle of general air-conditioner of the prior art does not have too big difference.
Just, the technical characterictic that the present invention gives prominence to is, also be provided with cold medium flux adjusting device 300, under the situation that air-conditioner is used as the greenhouse device, can prevent because the inlet pipe arrangement of circulation refrigerant not enough or the 2nd heat exchanger 330 that uses as evaporimeter of crossing that multimode causes and the phenomenon of outlet pipe arrangement place generation frosting.
In general, under the situation that air-conditioner is used as the greenhouse device, when the flow of the refrigerant of circulation is less than the flow of suitable refrigerant, the phenomenon of frosting will take place in the inlet pipe arrangement place of the 2nd heat exchanger 330 that uses as evaporimeter.On the contrary, when the flow of the refrigerant of circulation during more than the flow of suitable refrigerant, the phenomenon of frosting will take place in the outlet pipe arrangement place of the 2nd heat exchanger 330 that uses as evaporimeter.
Learn according to experiment, because circulation cold medium shortage and the time point that begins frosting at the inlet pipe arrangement place of the 2nd heat exchanger 330, for the temperature of the inlet pipe arrangement of above-mentioned the 2nd heat exchanger 330 probably is a time point below-2 ℃.Therefore, when the temperature of the inlet pipe arrangement of above-mentioned the 2nd heat exchanger 330 probably is below-2 ℃ the time, needs are replenished the refrigerant of underfed.
Corresponding with above-mentioned situation, because the time point that the circulation refrigerant too much begins frosting at the outlet pipe arrangement place of the 2nd heat exchanger 330, for the temperature of the outlet pipe arrangement of above-mentioned the 2nd heat exchanger 330 probably is a time point below-2 ℃.Therefore, when the temperature of the outlet pipe arrangement of above-mentioned the 2nd heat exchanger 330 probably is below-2 ℃ the time, needs are reduced the too much refrigerant of flow.
In the present invention, when the temperature of the gateway pipe arrangement of the 2nd heat exchanger 330 that uses as evaporimeter probably arrives below-2 ℃, cold medium flux adjusting device 300 will detect above-mentioned state, and the flow of the refrigerant of adjusting circulation, thereby prevent that the pipe arrangement place, gateway of above-mentioned the 2nd heat exchanger 330 from the phenomenon of frosting taking place.
Below, with reference to Fig. 4 and Fig. 5, the cold medium flux control method among the present invention is described in detail.
At first, with reference to Fig. 4, the operation of contingent frosting state under the situation that prevents refrigerant circulation deficiency in the greenhouse operation is described.
When beginning to carry out the greenhouse operation, air-conditioner will circulate refrigerant according to compression condensation-expansion-vaporization cycle.When initial greenhouse operation, electronics open and close valve 391,392 is in closed condition, and therefore, the pipe arrangement a of branch is in the state that mutual disconnection is connected with the pipe arrangement a ' of branch, and the pipe arrangement b of branch also will be in the state that mutual disconnection is connected with the pipe arrangement b ' of branch.
When carrying out the greenhouse operation, the temperature of the inlet pipe arrangement by temperature sensor 380 detected the 2nd heat exchangers 330, to be sent in the control part (not shown), above-mentioned control part will continue to judge whether the temperature that said temperature sensor 380 detects and transmits is (S401 step) below-2 ℃.
The result who judges in above-mentioned steps (S401 step), when the temperature of the inlet pipe arrangement of above-mentioned the 2nd heat exchanger 330 is higher than-2 ℃, control part will make above-mentioned electronics open and close valve 391 continue to keep closed conditions (S404 step).Thus, as the refrigerant of storage in the auxiliary refrigerant liquid storage bottle 390 of refrigerant storage facilities, can't supply in the 2nd heat exchanger 330 through the pipe arrangement a of branch, a ' and secondary expander 393.
In addition, the result who in above-mentioned steps (S401 step), judges, when the temperature of the inlet pipe arrangement of above-mentioned the 2nd heat exchanger 330 is lower than-2 ℃, control part will make above-mentioned electronics open and close valve 391 transfer open state (S402 step) to.When above-mentioned electronics open and close valve 391 is in open state, the refrigerant as storage in the auxiliary refrigerant liquid storage bottle 390 of refrigerant storage facilities will supply in the 2nd heat exchanger 330 through the above-mentioned pipe arrangement a of branch, a ' and secondary expander 393.Under the effect of the high temperature refrigerant of supplying with in above-mentioned secondary expander 393, the temperature of the inlet pipe arrangement of above-mentioned the 2nd heat exchanger 330 will rise immediately.
The variations in temperature of the inlet pipe arrangement of the 2nd heat exchanger 330 of above-mentioned rising, to detect by temperature sensor 380, and feed back in the above-mentioned control part, above-mentioned control part will judge whether the temperature that said temperature sensor 380 detects and transmits is (S403 step) below-2 ℃.
The result who judges in above-mentioned steps (S403 step) when the temperature of the inlet pipe arrangement of above-mentioned the 2nd heat exchanger 330 still is lower than-2 ℃, will carries out the S402 step, and keep the open state of above-mentioned electronics open and close valve 391.
On the contrary, the result who judges in above-mentioned steps (S403 step) when the temperature of the inlet pipe arrangement of above-mentioned the 2nd heat exchanger 330 is higher than-2 ℃, closes execution the step (S404 step) of above-mentioned electronics open and close valve 391.
After entering into the S404 step, will turn back to initial step (S401 step), and carry out aforesaid each process repeatedly.
Thus, under the situation of the underfed of circulation refrigerant, will replenish the refrigerant of underfed, and the phenomenon of frosting takes place in the inlet pipe arrangement place that can effectively reduce by the 2nd heat exchanger.
Below, with reference to Fig. 5, the operation that prevents contingent frosting state under the too much situation of refrigerant circulation in the greenhouse operation is described.
Identical with the situation of above-mentioned Fig. 4, when beginning to carry out the greenhouse operation, air-conditioner will circulate refrigerant according to compression condensation-expansion-vaporization cycle.When initial greenhouse operation, electronics open and close valve 391,392 is in closed condition, and therefore, the pipe arrangement a of branch is in the state that mutual disconnection is connected with the pipe arrangement a ' of branch, and the pipe arrangement b of branch also will be in the state that mutual disconnection is connected with the pipe arrangement b ' of branch.
When carrying out the greenhouse operation, the temperature of the outlet pipe arrangement by temperature sensor 370 detected the 2nd heat exchangers 330, to be sent in the control part (not shown), above-mentioned control part will continue to judge whether the temperature that said temperature sensor 370 detects and transmits is (S501 step) below-2 ℃.
The result who judges in above-mentioned steps (S501 step), when the temperature of the outlet pipe arrangement of above-mentioned the 2nd heat exchanger 330 is higher than-2 ℃, control part will make above-mentioned electronics open and close valve 392 continue to keep closed conditions (S504 step).Thus, the part of the refrigerant of supplying with from the outlet pipe arrangement of the 1st heat exchanger 320 will flow in the auxiliary refrigerant liquid storage bottle 390 without the pipe arrangement b of branch, b '.
In addition, the result who in above-mentioned steps (S501 step), judges, when the temperature of the outlet pipe arrangement of above-mentioned the 2nd heat exchanger 330 is lower than-2 ℃, control part will make above-mentioned electronics open and close valve 392 transfer open state (S502 step) to.When above-mentioned electronics open and close valve 392 is in open state, supply to the part of the refrigerant of expander 340 from the outlet pipe arrangement of the 1st heat exchanger 320, will flow in the auxiliary refrigerant liquid storage bottle 390 as the refrigerant storage facilities by the above-mentioned pipe arrangement b of branch, b '.Consequently, the amount of the circulation refrigerant of supplying with in the above-mentioned expander 340 will reduce, and when being in the amount minimizing of the circulation refrigerant that multimode circulates, the temperature of the outlet pipe arrangement of above-mentioned the 2nd heat exchanger 330 will rise immediately.
The variations in temperature of the outlet pipe arrangement of the 2nd heat exchanger 330 of above-mentioned rising, to detect by temperature sensor 370, and feed back in the above-mentioned control part, above-mentioned control part will judge whether the temperature that said temperature sensor 370 detects and transmits is (S503 step) below-2 ℃.
The result who judges in above-mentioned steps (S503 step) when the temperature of the outlet pipe arrangement of above-mentioned the 2nd heat exchanger 330 still is lower than-2 ℃, will carries out the S502 step, and keep the open state of above-mentioned electronics open and close valve 392.
On the contrary, the result who judges in above-mentioned steps (S503 step) when the temperature of the outlet pipe arrangement of above-mentioned the 2nd heat exchanger 330 is higher than-2 ℃, closes execution the step (S504 step) of above-mentioned electronics open and close valve 392.
After entering into the S504 step, will turn back to initial step (S501 step), and carry out aforesaid each process repeatedly.
Thus, under the too much situation of the flow of circulation refrigerant, will reduce the part of the too much refrigerant of flow, and the phenomenon of frosting takes place in the outlet pipe arrangement place that can effectively reduce by the 2nd heat exchanger.
As above described in detail, cause the frosting phenomenon that takes place in the present invention in order to prevent too much or not enough state owing to the appropriate amount of circulation refrigerant in advance, the invention provides temperature, make the refrigerant of circulation keep the structure and the method for the most suitable amount according to the gateway pipe arrangement of the 2nd heat exchanger that uses as evaporimeter.
Aforesaid basic fundamental thought of the present invention is based on the too much or not enough state of circulation refrigerant and the characteristic of the temperature generation difference of the gateway pipe arrangement that causes proposes, therefore according to the temperature of gateway pipe arrangement, with the Flow-rate adjustment of too much or not enough circulation refrigerant is all inventions of appropriate amount, all also all belongs in the technology category of the present invention in claim scope of the present invention.
And, in the present embodiment, when the temperature of for example clear gateway pipe arrangement probably is-2 ℃ coolant quantity is regulated, still, this is as a kind of embodiment of the present invention, and how many said temperatures may have difference according to the greenhouse ability of air-conditioner.
Therefore, can detect the temperature that frosting takes place in the inlet pipe arrangement respectively according to the greenhouse ability of air-conditioner with the operator of air-conditioner relevant industries, and realize technique effect of the present invention according to Fig. 4 and control method illustrated in fig. 5.
Effect of the present invention
The present invention can make the cold medium flux that circulates in the air-conditioner that carries out the greenhouse operation keep suitable amount, from And the heat exchanger that uses as evaporimeter that can prevent that too much or not enough state owing to refrigerant causes The phenomenon of frosting takes place in pipe arrangement place, gateway, so can prevent the air-conditioning that causes because of defrost operation frequently The problem that the greenhouse ability of device reduces.
Claims (9)
1, a kind of air-conditioner of regulating cold medium flux is characterized in that, it includes following several sections:
The compressor that is used for compression refrigerant;
The 1st heat exchanger that the above-mentioned refrigerant that flows into from above-mentioned compressor is carried out condensation;
The expander that the above-mentioned refrigerant that above-mentioned the 1st heat exchanger is supplied with reduces pressure;
The 2nd heat exchanger that the above-mentioned refrigerant that flows into from above-mentioned expander is evaporated;
Be connected between the inlet pipe arrangement of the outlet pipe arrangement of above-mentioned the 1st heat exchanger and above-mentioned the 2nd heat exchanger, make itself and above-mentioned expander constitute the relation of being connected in parallel, and be used to regulate the cold medium flux adjusting device of the flow of above-mentioned refrigerant.
2, the air-conditioner of regulating cold medium flux according to claim 1 is characterized in that including in the above-mentioned cold medium flux adjusting device:
Be used to store the refrigerant storage facilities of refrigerant;
A part that is used for refrigerant that the outlet pipe arrangement of above-mentioned the 1st heat exchanger is discharged supplies to the 1st branch's pipe arrangement of above-mentioned refrigerant storage facilities;
Be used for the refrigerant that above-mentioned refrigerant storage facilities is stored is supplied to the 2nd branch's pipe arrangement of the inlet pipe arrangement of above-mentioned the 2nd heat exchanger.
3, the air-conditioner of regulating cold medium flux according to claim 2 is characterized in that also including in the above-mentioned cold medium flux adjusting device: secondary expander;
Above-mentioned secondary expander is connected between the inlet pipe arrangement of above-mentioned the 2nd branch's pipe arrangement and above-mentioned the 2nd heat exchanger, and the refrigerant that supplies to above-mentioned the 2nd heat exchanger from above-mentioned the 2nd branch's pipe arrangement is reduced pressure and expands.
4, according to claim 2 or the 3 described air-conditioners of regulating cold medium flux, it is characterized in that also including in the above-mentioned cold medium flux adjusting device:
Be used to regulate the 1st electronics open and close valve of the open and-shut mode of above-mentioned the 1st branch's pipe arrangement;
Be used to regulate the 2nd electronics open and close valve of the open and-shut mode of above-mentioned the 2nd branch's pipe arrangement.
5, the air-conditioner of regulating cold medium flux according to claim 4 is characterized in that also including in the above-mentioned cold medium flux adjusting device:
Be used to detect the 1st temperature sensor of temperature of the inlet pipe arrangement of above-mentioned the 2nd heat exchanger;
Be used to detect the 2nd temperature sensor of temperature of the outlet pipe arrangement of above-mentioned the 2nd heat exchanger.
6, the air-conditioner of regulating cold medium flux according to claim 5 is characterized in that:
The temperature that detects according to above-mentioned the 1st temperature sensor and above-mentioned the 2nd temperature sensor, and the switching of regulating above-mentioned the 1st electronics open and close valve and above-mentioned the 2nd electronics open and close valve is whether.
7, the air-conditioner of regulating cold medium flux according to claim 6 is characterized in that:
When the temperature of the inlet pipe arrangement of above-mentioned the 2nd heat exchanger is below-2 ℃ the time, will control open above-mentioned the 2nd branch's pipe arrangement of above-mentioned the 2nd electronics open and close valve;
When the temperature of the outlet pipe arrangement of above-mentioned the 2nd heat exchanger is below-2 ℃ the time, will control open above-mentioned the 1st branch's pipe arrangement of above-mentioned the 1st electronics open and close valve.
8, a kind of cold medium flux control method of air-conditioner is characterized in that, it includes following several steps:
(a) step of compression refrigerant;
(b) refrigerant of above-mentioned compression is carried out the step of condensation by heat exchange;
(c) step that the refrigerant of above-mentioned condensation is reduced pressure and expands;
(d) step that the refrigerant of above-mentioned expansion is evaporated by heat exchange;
(e) in the process of carrying out above-mentioned compression condensation-expansion-vaporization cycle, when the flow of above-mentioned refrigerant reduces, additional services refrigerant in above-mentioned (d) step when the flow of above-mentioned refrigerant increases, reduces the step of the flow of the refrigerant of supplying with in above-mentioned (c) step.
9, the cold medium flux control method of air-conditioner according to claim 8 is characterized in that:
In above-mentioned (e) step, when the temperature of the refrigerant of supplying with in above-mentioned (d) step is uniform temperature when following, will be in above-mentioned (d) step the additional services refrigerant;
When the temperature of the refrigerant of discharging by above-mentioned (d) step evaporation is above-mentioned uniform temperature when following, will reduce the flow of the refrigerant of supplying with in above-mentioned (c) step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610013847 CN101078583A (en) | 2006-05-25 | 2006-05-25 | Air conditioner capable of adjusting cold medium flux and its regulation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610013847 CN101078583A (en) | 2006-05-25 | 2006-05-25 | Air conditioner capable of adjusting cold medium flux and its regulation method |
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| Publication Number | Publication Date |
|---|---|
| CN101078583A true CN101078583A (en) | 2007-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610013847 Pending CN101078583A (en) | 2006-05-25 | 2006-05-25 | Air conditioner capable of adjusting cold medium flux and its regulation method |
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| CN (1) | CN101078583A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102207323A (en) * | 2010-03-31 | 2011-10-05 | 苏州三星电子有限公司 | Automatic regulating apparatus and method of refrigerant amount of air conditioner |
| CN103471303A (en) * | 2013-09-29 | 2013-12-25 | Tcl空调器(中山)有限公司 | Air conditioner and anti-condensation method thereof |
| CN104329838A (en) * | 2014-11-19 | 2015-02-04 | 珠海格力电器股份有限公司 | Refrigerant adjusting method and device, and air conditioner |
| WO2018086418A1 (en) * | 2016-11-14 | 2018-05-17 | 重庆美的通用制冷设备有限公司 | Refrigerating system and refrigerating device having same |
| CN109798689A (en) * | 2019-03-01 | 2019-05-24 | 广东纽恩泰新能源科技发展有限公司 | A kind of heat pump system capacity regulation method |
| CN110529966A (en) * | 2019-09-09 | 2019-12-03 | 宁波奥克斯电气股份有限公司 | A kind of change coolant quantity air-conditioning system and its control method |
| CN111207450A (en) * | 2020-01-14 | 2020-05-29 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
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| CN114061251A (en) * | 2020-07-31 | 2022-02-18 | 深圳Tcl新技术有限公司 | Refrigerator defrosting method, intelligent refrigerator and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102207323A (en) * | 2010-03-31 | 2011-10-05 | 苏州三星电子有限公司 | Automatic regulating apparatus and method of refrigerant amount of air conditioner |
| CN103471303A (en) * | 2013-09-29 | 2013-12-25 | Tcl空调器(中山)有限公司 | Air conditioner and anti-condensation method thereof |
| CN103471303B (en) * | 2013-09-29 | 2017-01-25 | Tcl空调器(中山)有限公司 | Air conditioner and anti-condensation method thereof |
| CN104329838A (en) * | 2014-11-19 | 2015-02-04 | 珠海格力电器股份有限公司 | Refrigerant adjusting method and device, and air conditioner |
| WO2018086418A1 (en) * | 2016-11-14 | 2018-05-17 | 重庆美的通用制冷设备有限公司 | Refrigerating system and refrigerating device having same |
| CN109798689A (en) * | 2019-03-01 | 2019-05-24 | 广东纽恩泰新能源科技发展有限公司 | A kind of heat pump system capacity regulation method |
| CN110529966A (en) * | 2019-09-09 | 2019-12-03 | 宁波奥克斯电气股份有限公司 | A kind of change coolant quantity air-conditioning system and its control method |
| CN111207450A (en) * | 2020-01-14 | 2020-05-29 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
| CN111207450B (en) * | 2020-01-14 | 2021-04-16 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
| CN114061251A (en) * | 2020-07-31 | 2022-02-18 | 深圳Tcl新技术有限公司 | Refrigerator defrosting method, intelligent refrigerator and storage medium |
| CN114061251B (en) * | 2020-07-31 | 2023-08-01 | 深圳Tcl新技术有限公司 | Refrigerator defrosting method, intelligent refrigerator and storage medium |
| CN112682905A (en) * | 2020-12-02 | 2021-04-20 | 珠海格力电器股份有限公司 | Liquid supplementing type air conditioning system, control method, computer equipment and terminal |
| CN112682905B (en) * | 2020-12-02 | 2022-02-08 | 珠海格力电器股份有限公司 | Liquid supplementing type air conditioning system, control method, computer equipment and terminal |
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