CN204786771U - Air conditioner - Google Patents

Air conditioner Download PDF

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Publication number
CN204786771U
CN204786771U CN201520364813.9U CN201520364813U CN204786771U CN 204786771 U CN204786771 U CN 204786771U CN 201520364813 U CN201520364813 U CN 201520364813U CN 204786771 U CN204786771 U CN 204786771U
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China
Prior art keywords
valve
air
valve port
conditioner
refrigerant
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Withdrawn - After Issue
Application number
CN201520364813.9U
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Chinese (zh)
Inventor
李文博
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
Guangdong Midea Refrigeration Equipment Co Ltd
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Priority to CN201520364813.9U priority Critical patent/CN204786771U/en
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Publication of CN204786771U publication Critical patent/CN204786771U/en
Withdrawn - After Issue legal-status Critical Current
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Abstract

The utility model discloses an air conditioner, include: compressor, switching -over subassembly, indoor heat exchanger and outdoor heat exchanger. Wherein the compressor is provided with an air exhaust opening and an air returning opening. The switching -over subassembly has first valve port to fourth valve port, first valve port and gas vent intercommunication, fourth valve port and return -air mouth intercommunication, the first end of indoor heat exchanger links to each other with the second valve port, and the second end of indoor heat exchanger is connected with has throttle step -down effect and aperture adjustable orifice union, outdoor heat exchanger includes a plurality of heat transfer parts, and the first end of every heat transfer part links to each other with the third valve port, and the second end of every heat transfer part links to each other with the orifice union, establishes ties respectively and have the control valve that is used for controlling the refrigerant passage break -make in the both ends of at least one heat transfer part. According to the utility model discloses an air conditioner can realize air conditioner's cryogenic refrigeration to can avoid the lower indoor set that leads to of refrigerant temperature to freeze and compressor time liquid.

Description

Air-conditioner
Technical field
The utility model relates to temperature control equipment technical field, particularly relates to a kind of air-conditioner.
Background technology
In existing Control Method of Inverter Air Conditioner, the method for operation of air-conditioner is using design temperature and current indoor environment temperature as data basis, carries out the adjustment of compressor frequency.If indoor environment temperature and design temperature differ greatly, compressor will run with high frequency, if indoor environment temperature and design temperature differ very little, compressor will with low-frequency operation.And when outdoor environment temperature is lower, if now indoor still demand refrigeration, when air-conditioner operates according to existing control model, can be in a higher frequency state, because outdoor heat exchanger effect is very good, than being easier to cause, indoor set freezes, compressor returns the problems such as liquid.
Utility model content
The utility model is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, the utility model proposes a kind of air-conditioner, this air-conditioner can realize cryogenic refrigeration, and can avoid that indoor set freezes, compressor returns liquid.
According to air-conditioner of the present utility model, comprising: compressor, described compressor has exhaust outlet and gas returning port; Commutation assembly, described commutation assembly has the first valve port to the 4th valve port, described first valve port is communicated with one of them in the 3rd valve port with the second valve port, described 4th valve port and described second valve port are communicated with another in described 3rd valve port, described first valve port is communicated with described exhaust outlet, and described 4th valve port is communicated with described gas returning port; Indoor heat exchanger, the first end of described indoor heat exchanger is connected with described second valve port, and the second end of described indoor heat exchanger is connected with has reducing pressure by regulating flow effect and the adjustable orifice union of aperture; Outdoor heat exchanger, described outdoor heat exchanger comprises multiple heat exchanging part, the first end of each described heat exchanging part is connected with described 3rd valve port, second end of each described heat exchanging part is connected with described orifice union, and the two ends of heat exchanging part described at least one are in series with the control valve for controlling refrigerant flow break-make respectively.
According to air-conditioner of the present utility model, the heat exchanging part of outdoor heat exchanger is multiple, when air-conditioner running refrigerating, refrigerant can be stored in part heat exchanging part, to reduce the flow of the refrigerant in air-conditioner, realize the cryogenic refrigeration of air-conditioner, thus can avoid refrigerant temperature lower cause indoor set freeze and compressor return the problems such as liquid.When air-conditioner needs normally to freeze, the refrigerant being stored in heat exchanging part normally can circulate in air-conditioner, to improve the refrigeration of air-conditioner.Meanwhile, by the effect regulating the aperture of orifice union to control coolant throttle step-down, thus the refrigeration of air-conditioner can be controlled further.
According to embodiments more of the present utility model, described heat exchanging part is two, and the two ends of heat exchanging part described in one of them are in series with described control valve respectively.
According to embodiments more of the present utility model, described orifice union is electric expansion valve.
According to embodiments more of the present utility model, multiple refrigerant passage is parallel with between described outdoor heat exchanger and described indoor heat exchanger, refrigerant passage described in one of them is in series with the first on-off valve, each refrigerant passage in all the other refrigerant passages is in series with capillary and the second on-off valve, described first on-off valve, described capillary and described second on-off valve construct described orifice union.
Alternatively, the length of the described capillary of refrigerant passage described in all the other being connected is different.
Alternatively, described first on-off valve is magnetic valve.
Alternatively, described second on-off valve is magnetic valve.
According to embodiments more of the present utility model, described air-conditioner also comprises gas-liquid separator, and described gas-liquid separator comprises gas-liquid entrance and gas vent, and described gas-liquid entrance is connected with described 4th valve port, and described gas vent is connected with described gas returning port.
Accompanying drawing explanation
Fig. 1 is the structural representation of the air-conditioner according to an embodiment of the present utility model;
Fig. 2 is the structural representation of the air-conditioner according to another embodiment of the present utility model.
Reference numeral:
Air-conditioner 100;
Compressor 1, exhaust outlet 11, gas returning port 12;
Commutation assembly 2, first valve port 21, second valve port the 22, three valve port the 23, four valve port 24;
Indoor heat exchanger 6, the first end 61 of indoor heat exchanger, the second end 62 of indoor heat exchanger;
Outdoor heat exchanger 3, the first end 311 of the first heat exchanging part 31, first heat exchanging part, second end 312, first control valve 313, second control valve 314 of the first heat exchanging part, second end 322 of first end 321, second heat exchanging part of the second heat exchanging part 32, second heat exchanging part;
Orifice union 4, the first refrigerant passage 41, first on-off valve 411, second refrigerant passage 42, second capillary the 421, three refrigerant passage 43, three capillary 431, the 4th refrigerant passage the 44, four capillary 441, second on-off valve 45;
Gas-liquid separator 5, gas-liquid entrance 51, gas vent 52.
Detailed description of the invention
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In description of the present utility model, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection or each other can communication; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.
Below with reference to Fig. 1 and Fig. 2, the air-conditioner 100 according to the utility model embodiment is described.
As shown in Figure 1, compressor 1, commutation assembly 2, indoor heat exchanger 6 and outdoor heat exchanger 3 can be comprised according to the air-conditioner 100 of the utility model embodiment.
As shown in Figure 1, compressor 1 has exhaust outlet 11 and gas returning port 12, and refrigerant is discharged from exhaust outlet 11 after compressor 1 compresses, after outdoor heat exchanger 3 and indoor heat exchanger 6 carry out heat exchange, get back to compressor 1 from gas returning port 12, thus, recycling of refrigerant can be realized.
As depicted in figs. 1 and 2, commutation assembly 2 has four valve ports, be respectively the first valve port 21, second valve port 22, the 3rd valve port 23 and the 4th valve port 24, first valve port 21 is communicated with one of them in the 3rd valve port 23 with the second valve port 22,4th valve port 24 and the second valve port 22 are communicated with another in the 3rd valve port 23, first valve port 21 is connected with exhaust outlet 11, and the 4th valve port 24 is connected with gas returning port 12.Like this, refrigerant is discharged from the exhaust outlet 11 of compressor 1, flows to the first valve port 21, and can discharge from one of them of the second valve port 22 and the 3rd valve port 23; When refrigerant recovering flows to compressor 1, flow to the 4th valve port 24 from another of the second valve port 22 and the 3rd valve port 23, and flow to gas returning port 12 from the 4th valve port 24, flow to compressor 1 from gas returning port 12 and compress.
The first end 61 of indoor heat exchanger 6 is connected with the second valve port 22, second end 62 of indoor heat exchanger 6 is connected with orifice union 4, orifice union 4 has the effect of reducing pressure by regulating flow, the aperture of orifice union 4 can regulate, that is, by arranging orifice union 4, the amount of restriction of refrigerant can be regulated as required, and then the temperature after the reducing pressure by regulating flow of adjustment refrigerant, thus the refrigeration of adjustable refrigerant.
Outdoor heat exchanger 3 comprises multiple heat exchanging part, the first end of each heat exchanging part is connected with the 3rd valve port 23, the Part II of each heat exchanging part is connected with orifice union 4, that is, be connected between the 3rd valve port 23 and orifice union 4 after multiple heat exchanging part parallel connection, refrigerant can flow to each heat exchanging part from the 3rd valve port 23.
The two ends of a heat exchanging part are had at least to be in series with control valve respectively in multiple heat exchanging part, be respectively the first control valve 313 and the second control valve 314, for the break-make controlling refrigerant flow, first control valve 313 can control refrigerant and flow into heat exchanging part, and the second control valve 314 can control refrigerant and flow out heat exchanging part.Like this, part refrigerant can be stored in two ends and be in series with respectively in the heat exchanging part of control valve, particularly, when coolant quantity is greater than demand, first control valve 313 is opened, and the second control valve 314 is closed, to stop the circulation of the refrigerant flowing into this heat exchanging part, part refrigerant is stored in this heat exchanging part, reduces the flow of refrigerant in air-conditioner 100.When coolant quantity is not enough, open the second control valve 314, the refrigerant be stored in this heat exchanging part circulates in air-conditioner 100, thus controls the circular flow of refrigerant.
Wherein, when indoor running refrigerating, first valve port 21 of commutation assembly 2 is communicated with the 3rd valve port 23, second valve port 22 is communicated with the 4th valve port 24, refrigerant flows to outdoor heat exchanger 3 from the 3rd valve port 23, and flow to indoor heat exchanger 6 through orifice union 4, and get back to compressor 1 by the second valve port 22 and the 4th valve port 24.
Lower at outdoor environment temperature, during indoor running refrigerating, part refrigerant can be existed at least one heat exchanging part, to reduce the flow of refrigerant, and then reduction refrigeration, when refrigerant flows through orifice union 4, the aperture of orifice union 4 can be regulated, and then regulate refrigerant in the reducing pressure by regulating flow effect of orifice union 4, further can control the refrigeration of refrigerant, thus the cryogenic refrigeration of air-conditioner 100 can be realized, avoid causing because refrigerant temperature is lower indoor set to freeze and the problem such as compressor 1 time liquid.Higher in outdoor temperature, when air-conditioner 100 needs normally to freeze, open the second control valve 314, the refrigerant being stored in heat exchanging part is circulated, to improve the refrigeration of air-conditioner 100 in air-conditioner 100.
According to the air-conditioner 100 of the utility model embodiment, the heat exchanging part of outdoor heat exchanger 3 is multiple, when air-conditioner 100 running refrigerating, refrigerant can be stored in part heat exchanging part, to reduce the flow of the refrigerant in air-conditioner 100, realize the cryogenic refrigeration of air-conditioner 100, thus can avoid causing because refrigerant temperature is lower indoor set to freeze and the problem such as compressor 1 time liquid.When air-conditioner 100 needs normally to freeze, the refrigerant being stored in heat exchanging part normally can circulate in air-conditioner 100, to improve the refrigeration of air-conditioner 100.Meanwhile, by the effect regulating the aperture of orifice union 4 to control coolant throttle step-down, thus the refrigeration of air-conditioner 100 can be controlled further.
As shown in Figure 1, the heat exchanging part of outdoor heat exchanger 3 can be two, be respectively the first heat exchanging part 31 and the second heat exchanging part 32, the first end 311 of the first heat exchanging part 31 is all connected with the 3rd valve port 23 with the first end 321 of the second heat exchanging part 32, second end 312 of the first heat exchanging part 31 is all connected with orifice union 4 with the second end 322 of the second heat exchanging part 32, in brief, first heat exchanging part 31 and the second heat exchanging part 32 are arranged in parallel, and are connected between the 3rd valve port 23 and orifice union 4.
Particularly, the two ends of the first heat exchanging part 31 are in series with the first control valve 313 and the second control valve 314, first control valve 313 is connected with the first end 311 of the first heat exchanging part 31, and the second control valve 314 is connected with the second end 312 of the first heat exchanging part 31.Open at the first control valve 313, when the second control valve 314 is closed, can the refrigerant flowing to the first heat exchanging part 31 is stored in the first heat exchanging part 31; When the second control valve 314 is opened, refrigerant flows out from the first heat exchanging part 31, to increase the internal circulating load of refrigerant, improves the refrigeration of air-conditioner.Alternatively, two control valves can be magnetic valve, and magnetic valve is quick on the draw, thus more effectively can control the circulation of refrigerant.
In embodiments more of the present utility model, as shown in Figure 2, orifice union 4 can be electric expansion valve, electric expansion valve has the effect of reducing pressure by regulating flow, simultaneously by regulating the flow of the refrigerant of the aperture controllable flow warp of electric expansion valve, and electronic expansion valve structure is simple, is convenient to install, thus make the structure of air-conditioner 100 simple, improve the efficiency of assembling of air-conditioner 100.
In other embodiments of the present utility model, as shown in Figure 1, air-conditioner 100 also comprises multiple refrigerant passage, multiple refrigerant passage is arranged in parallel between indoor heat exchanger 6 and outdoor heat exchanger 3, one of them refrigerant passage is in series with the first on-off valve 411, that is, this refrigerant passage does not have the effect of reducing pressure by regulating flow, and the first on-off valve 411 can control the break-make of this refrigerant passage; Each refrigerant passage in all the other refrigerant passages is all in series with capillary and the second on-off valve 45, wherein, capillary has the effect of reducing pressure by regulating flow, second on-off valve 45 can control the break-make of each refrigerant passage, it can thus be appreciated that, first on-off valve 411, capillary and the second on-off valve 45 construct orifice union 4, thus can realize the reducing pressure by regulating flow effect of orifice union 4 pairs of refrigerants.By adopting the first on-off valve 411, capillary and the second on-off valve 45 to construct orifice union 4, the cost of air-conditioner 100 can be reduced.
Alternatively, the length of the capillary that all the other each refrigerant passages are connected is different, and that is, the reducing pressure by regulating flow effect of each refrigerant passage is different, wherein, the length of capillary is longer, and its reducing pressure by regulating flow effect is better, like this, by the opening and closing of multiple refrigerant passage, namely control the opening and closing of the first on-off valve 411 and multiple second on-off valve 45, thus the effect of the reducing pressure by regulating flow of orifice union 4 can be controlled, and then the refrigeration of the refrigerant of control flow check warp.
In the example depicted in fig. 1, air-conditioner 100 can comprise four refrigerant passages, be respectively the first refrigerant passage 41, second refrigerant passage 42, 3rd refrigerant passage 43 and the 4th refrigerant passage 44, first refrigerant passage 41 is in series with the first on-off valve 411, second refrigerant passage 42 is in series with the second capillary 421 and second on-off valve 45, 3rd refrigerant passage 43 is in series with three capillary 431 and second on-off valve 45, 4th refrigerant passage 44 is in series with the 4th capillary 441 and second on-off valve 45, wherein, second capillary 421, the length of three capillary 431 and the 4th capillary 441 increases successively, when air-conditioner 100 running refrigerating, can according to the refrigeration needs of air-conditioner 100, select the one or more refrigerant passage conductings in four refrigerant passages.
As optional embodiment, the first on-off valve 411 and the second on-off valve 45 can be magnetic valve, and magnetic valve is quick on the draw, and can be connected with controller, thus effectively can control the circulation of refrigerant in refrigerant passage.
In embodiments more of the present utility model, air-conditioner 100 can also comprise gas-liquid separator 5, as depicted in figs. 1 and 2, gas-liquid separator 5 has gas-liquid entrance 51 and gas vent 52, gas-liquid entrance 51 is connected with the 4th valve port 24, gas vent 52 is connected with gas returning port 12, like this, gas-liquid separator 5 can play the effect of gas-liquid separation, gaseous coolant after separation can flow to compressor 1 by gas returning port 12 compress from gas vent 52, to realize recycling of refrigerant, can avoid compressor 1 that liquid hit phenomenon occurs.
In addition, the utility model also proposes a kind of control method of above-mentioned air-conditioner 100, this air-conditioner 100 preset temperature interval be [T1s1, T2s1), and can be divided into multiple subinterval, wherein T1s1 is less than T2s1.Thus different refrigeration can be realized at different temperature range air-conditioners 100, avoid when cryogenic refrigeration, because refrigerant temperature is too low, cause indoor set to freeze or compressor 1 time liquid phenomenon.
First, control air-conditioner 100 to start shooting and running refrigerating, detection outdoor environment temperature is T1, and the outdoor environment temperature T1 detected and the first preset value T2s1 is compared, if T1 < is T21s1, air-conditioner 100 enters cryogenic refrigeration pattern, if T1 >=T21s1, then continue to compare, and keep normal refrigerating state.
When cryogenic refrigeration pattern, the aperture of orifice union 4 is first adjusted to maximum, control valve between heat exchanging part and the 3rd valve port 23 is opened, control valve between heat exchanging part and orifice union 4 is closed, part refrigerant is flowed into and is stored at least one heat exchanging part being in series with control valve, to reduce cold medium flux.
After t1 after a predetermined time, close the control valve between heat exchanging part and the 3rd valve port 23, according to the subinterval belonging to outdoor environment temperature T1, regulate the aperture of orifice union 4, in each subinterval, the aperture of orifice union 4 is different; Wherein, in cryogenic refrigeration pattern, when exit criteria being detected, air-conditioner 100 exits cryogenic refrigeration pattern.
It can thus be appreciated that, in cryogenic refrigeration pattern, because outdoor environment temperature is lower, the good effect of heat exchange of outdoor heat exchanger 3, therefore by being stored in a part of heat exchanging part by part refrigerant, the flow of the refrigerant circulated can be reduced, simultaneously by controlling the aperture of orifice union 4, adjustment enters into the temperature of the refrigerant of indoor heat exchanger 6, thus can avoid because flowing into refrigerant temperature in indoor heat exchanger 6 too low and cause indoor set to freeze and compressor returns liquid.
In brief, according to the control method of air-conditioner of the present utility model, the cryogenic refrigeration of air-conditioner 100 can be realized, reduce the refrigeration of air-conditioner 100 when cryogenic refrigeration pattern, avoid that indoor set occurs and freeze and compressor 1 time liquid phenomenon.
As optional embodiment, exit criteria can be detection outdoor environment temperature T1 and is greater than the second predetermined value T3s1, the second predetermined value T3s1 >=the first predetermined value T2s1.Such as, when T2s1 is 20 DEG C, then T3s1 >=20 DEG C, when detection outdoor environment temperature T1 is any temperature being greater than 20 DEG C, air-conditioner 100 all exits cryogenic refrigeration pattern, enters normal refrigeration mode.
Below with reference to Fig. 1 and Fig. 2, the control method of this air-conditioner 100 is described in detail.
For preset temperature is interval, such as, preset temperature interval [T1s1, T2s1) can be [-30,20), be 5 DEG C with the temperature difference in each subinterval, pre-set interval temperature can be divided into ten subintervals, ten subintervals are respectively [15,20), [10,15), [5,10), [0,5), [-5,0), [-10 ,-5), [-15,-10), [-20,-15), [-25 ,-20) and [-30 ,-25).
In the example depicted in fig. 1, air-conditioner 100 is started shooting and is freezed, detecting outdoor environment temperature is T1, when T1 < T21s1 (i.e. T1 < 20 DEG C), open the first control valve 313 of the first heat exchanging part 31, close the second control valve 314, refrigerant flows to the first heat exchanging part 31 and the second heat exchanging part 32 from the 3rd valve port 23, the refrigerant circulation of the second heat exchanging part 32, and flow to orifice union 4, the refrigerant flowing through the first heat exchanging part 31 will be stored in the first heat exchanging part 31, after t1 after a predetermined time, first control valve 313 is closed, refrigerant only flows to the second heat exchanging part 32.
Then the subinterval belonging to outdoor environment temperature T1, regulate the aperture of orifice union 4, namely control the break-make of the first refrigerant passage 41, second refrigerant passage 42, the 3rd refrigerant passage 43 and the 4th refrigerant passage 44, and then regulate the reducing pressure by regulating flow effect of orifice union 4.
Such as, as shown in Figure 1, outdoor environment temperature T1 be in [15,20) time, the 4th refrigerant passage 44 open circulation, other refrigerant passages are closed, that is, the second on-off valve 45 on the 4th refrigerant passage 44 is opened, and the second on-off valve 45 on the second refrigerant passage 42 and the 3rd refrigerant passage 43 and the first on-off valve 411 on the first refrigerant passage 41 are closed, now coolant throttle hypotensive effect is maximum, and refrigeration is best.
Outdoor environment temperature T1 be in [10,15) time, the 3rd refrigerant passage 43 circulates, and other refrigerant passages are all closed; Outdoor environment temperature T1 be in [5,10) time, the 3rd refrigerant passage 43 and the 4th refrigerant passage 44 open circulation, and the second refrigerant passage 42 and the first refrigerant passage 41 are closed; Outdoor environment temperature T1 be in [0,5) time, second refrigerant passage 42 open circulation, other refrigerant passages are all closed; Outdoor environment temperature T1 be in [-5,0) time, the 4th refrigerant passage 44 and the second refrigerant passage 42 open circulation, and the 3rd refrigerant passage 43 and the first refrigerant passage 41 are closed; Outdoor environment temperature T1 be in [-10 ,-5) time, the 3rd refrigerant passage 43 and the second refrigerant passage 42 open circulation, and the first refrigerant passage 41 and the 4th refrigerant passage 44 are closed; Outdoor environment temperature T1 be in [-15 ,-10) time, the 4th refrigerant passage 44, the 3rd refrigerant passage 43 and the second refrigerant passage 42 open circulation, the first refrigerant passage 41 is closed; Outdoor environment temperature T1 be in [-20 ,-15) time, first refrigerant passage 41 open circulation, the 4th refrigerant passage 44, the 3rd refrigerant passage 43 and the second refrigerant passage 42 are closed; Outdoor environment temperature T1 be in [-25 ,-20) time, the first refrigerant passage 41, the 3rd refrigerant passage 43 and the 4th refrigerant passage 44 open circulation, the second refrigerant passage 42 is closed; Outdoor environment temperature T1 be in [-30 ,-25) time, four refrigerant passages are all opened.
When detecting outdoor environment temperature T1 and being greater than 20 DEG C, open the first control valve 313 and the second control valve 314, the refrigerant of the first heat exchanging part 31 goes into circulation, and open the 4th refrigerant passage 44, close the first refrigerant passage 41, second refrigerant passage 42 and the 3rd refrigerant passage 43, enter normal refrigeration mode.
In an embodiment as illustrated in figure 2, air-conditioner 100 is started shooting and is freezed, preset temperature interval [T1s1, T2s1) be [-30,20), detect outdoor environment temperature T1 and be in [-30,20), time, first open the first control valve 313 of the first heat exchanging part 31, close the second control valve 314, the refrigerant flowing through the first heat exchanging part 31 is stored in the first heat exchanging part 31, the refrigerant circulation of the second heat exchanging part 32, and flows to orifice union 4, after t1 after a predetermined time, first control valve 313 is closed, and refrigerant circulates in the second heat exchanging part 32.
Then each subinterval belonging to outdoor environment temperature T1, regulate the aperture of electric expansion valve, when the temperature in the subinterval belonging to outdoor environment temperature T1 is higher, electronic expansion valve opening is little, the reducing pressure by regulating flow of refrigerant is effective, when the temperature in the subinterval belonging to outdoor environment temperature T1 is lower, electronic expansion valve opening is large, and reducing pressure by regulating flow effect reduces.
According to control method of the present utility model, the cryogenic refrigeration of air-conditioner 100 can be realized, reduce the refrigeration of air-conditioner 100 when cryogenic refrigeration pattern, avoid that indoor set occurs and freeze and compressor 1 time liquid phenomenon.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this description or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment, revises, replace and modification in scope of the present utility model.

Claims (8)

1. an air-conditioner, is characterized in that, comprising:
Compressor, described compressor has exhaust outlet and gas returning port;
Commutation assembly, described commutation assembly has the first valve port to the 4th valve port, described first valve port is communicated with one of them in the 3rd valve port with the second valve port, described 4th valve port and described second valve port are communicated with another in described 3rd valve port, described first valve port is communicated with described exhaust outlet, and described 4th valve port is communicated with described gas returning port;
Indoor heat exchanger, the first end of described indoor heat exchanger is connected with described second valve port, and the second end of described indoor heat exchanger is connected with has reducing pressure by regulating flow effect and the adjustable orifice union of aperture;
Outdoor heat exchanger, described outdoor heat exchanger comprises multiple heat exchanging part, the first end of each described heat exchanging part is connected with described 3rd valve port, second end of each described heat exchanging part is connected with described orifice union, and the two ends of heat exchanging part described at least one are in series with the control valve for controlling refrigerant flow break-make respectively.
2. air-conditioner according to claim 1, is characterized in that, described heat exchanging part is two, and the two ends of heat exchanging part described in one of them are in series with described control valve respectively.
3. air-conditioner according to claim 1, is characterized in that, described orifice union is electric expansion valve.
4. air-conditioner according to claim 1, it is characterized in that, multiple refrigerant passage is parallel with between described outdoor heat exchanger and described indoor heat exchanger, refrigerant passage described in one of them is in series with the first on-off valve, each refrigerant passage in all the other refrigerant passages is in series with capillary and the second on-off valve, described first on-off valve, described capillary and described second on-off valve construct described orifice union.
5. air-conditioner according to claim 4, is characterized in that, the length of the described capillary that refrigerant passage described in all the other is connected is different.
6. air-conditioner according to claim 4, is characterized in that, described first on-off valve is magnetic valve.
7. air-conditioner according to claim 4, is characterized in that, described second on-off valve is magnetic valve.
8. the air-conditioner according to any one of claim 1-7, it is characterized in that, also comprise gas-liquid separator, described gas-liquid separator comprises gas-liquid entrance and gas vent, described gas-liquid entrance is connected with described 4th valve port, and described gas vent is connected with described gas returning port.
CN201520364813.9U 2015-05-29 2015-05-29 Air conditioner Withdrawn - After Issue CN204786771U (en)

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Cited By (8)

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CN105042924A (en) * 2015-05-29 2015-11-11 广东美的制冷设备有限公司 Air conditioner and control method thereof
CN106403411A (en) * 2016-09-14 2017-02-15 珠海格力电器股份有限公司 Throttling device, air conditioner device and control method of air conditioner device
WO2017185515A1 (en) * 2016-04-29 2017-11-02 广东美的制冷设备有限公司 Cooling and heating air conditioner, cooling air conditioner and controlling method for air conditioner
WO2017185513A1 (en) * 2016-04-29 2017-11-02 广东美的制冷设备有限公司 Cooling-heating type air conditioner, cooling-only type air conditioner, control method for air conditioner
WO2017185517A1 (en) * 2016-04-29 2017-11-02 广东美的制冷设备有限公司 Cooling and heating air conditioner, cooling-only air conditioner, and control method for air conditioner
CN108800420A (en) * 2018-06-19 2018-11-13 广东美的制冷设备有限公司 The control method and device of air-conditioning
CN110500740A (en) * 2019-08-22 2019-11-26 Tcl空调器(中山)有限公司 Air-conditioner with fixed frequency and its control method, control device and storage medium
CN111878963A (en) * 2020-07-21 2020-11-03 宁波奥克斯电气股份有限公司 Capillary tube control method and device of air conditioner, air conditioner and storage medium

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105042924A (en) * 2015-05-29 2015-11-11 广东美的制冷设备有限公司 Air conditioner and control method thereof
WO2017185515A1 (en) * 2016-04-29 2017-11-02 广东美的制冷设备有限公司 Cooling and heating air conditioner, cooling air conditioner and controlling method for air conditioner
WO2017185513A1 (en) * 2016-04-29 2017-11-02 广东美的制冷设备有限公司 Cooling-heating type air conditioner, cooling-only type air conditioner, control method for air conditioner
WO2017185517A1 (en) * 2016-04-29 2017-11-02 广东美的制冷设备有限公司 Cooling and heating air conditioner, cooling-only air conditioner, and control method for air conditioner
CN106403411A (en) * 2016-09-14 2017-02-15 珠海格力电器股份有限公司 Throttling device, air conditioner device and control method of air conditioner device
CN108800420A (en) * 2018-06-19 2018-11-13 广东美的制冷设备有限公司 The control method and device of air-conditioning
CN110500740A (en) * 2019-08-22 2019-11-26 Tcl空调器(中山)有限公司 Air-conditioner with fixed frequency and its control method, control device and storage medium
CN111878963A (en) * 2020-07-21 2020-11-03 宁波奥克斯电气股份有限公司 Capillary tube control method and device of air conditioner, air conditioner and storage medium
CN111878963B (en) * 2020-07-21 2022-03-08 宁波奥克斯电气股份有限公司 Capillary tube control method and device of air conditioner, air conditioner and storage medium

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