CN104006584B - Three control air-conditionings and its refrigerant flow to switching device - Google Patents

Three control air-conditionings and its refrigerant flow to switching device Download PDF

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Publication number
CN104006584B
CN104006584B CN201310061141.XA CN201310061141A CN104006584B CN 104006584 B CN104006584 B CN 104006584B CN 201310061141 A CN201310061141 A CN 201310061141A CN 104006584 B CN104006584 B CN 104006584B
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refrigerant
valve
interface
pressure
control
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CN104006584A (en
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梁泽坤
许永锋
熊美兵
任林行
杨元涛
李�根
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Midea Group Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
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Midea Group Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
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Abstract

The invention discloses a kind of three control air-conditioning and its refrigerant flow to switching device, the refrigerant according to the present invention flows to switching device, including:Multiple control valve components, each described control valve component is corresponding with multiple indoor heat exchangers of three control air-conditionings, and each described control valve component is respectively provided with the first to the 3rd interface, when wherein described indoor heat exchanger is in refrigerating state, the first interface of the control valve component connected with the indoor heat exchanger is connected with second interface and first interface and the 3rd interface disconnect, the indoor heat exchanger is in when heating state, the first interface of the control valve component connected with the indoor heat exchanger is disconnected with second interface and first interface and the 3rd orifice, each described control valve component individually controls the corresponding indoor heat exchanger refrigeration or heats.The refrigerant of the present invention flows to switching device, can make that the part in multiple indoor heat exchangers is freezed and another part is heated.

Description

Three control air-conditionings and its refrigerant flow to switching device
Technical field
The present invention relates to refrigerating/heating equipment manufacturing technology field, the refrigerant flow direction of more particularly to a kind of three control air-conditioning Switching device and the three control air-conditionings with the device.
Background technology
It is well known that general three control refrigerant flows to switching device following problem:
First, general three control refrigerant flow to that switching device is lower and connected in machine must run same pattern, therefore if require per In platform machine all can unrestricted choice refrigeration, heating operation that must all join a refrigerant per machine in platform and flow to switching device, and install More complicated;
2nd, the different interior machine of general three control coolant system can freeze simultaneously, heating operation, under some bad working environments by In the condensed liquid refrigerants degree of supercooling of interior machine is heated not enough, the electronic expansion of machine in refrigeration can be passed through with the state of gas-liquid two-phase Valve.The sound of similar boiling water can be produced when the refrigerant of gas-liquid two-phase is by interior machine electric expansion valve, and impact user uses, while Cold medium flux can be reduced by electric expansion valve with gas-liquid two-phase refrigerant, refrigeration is affected, needs improvement badly;
3rd, general three control refrigerant flows to switching device, refrigeration/system that indoor set is closed before pattern switching Before and after thermoelectrical magnetic valve, pressure reduction is larger, can produce very big noise when refrigerating/heating magnetic valve is opened during switching, and being unsuitable for user makes With needing improvement badly.
Content of the invention
It is contemplated that at least solving one of above-mentioned technical problem to a certain extent or providing at a kind of useful business Industry is selected.For this purpose, it is an object of the present invention to proposing the refrigerant stream of a kind of simple structure and three little control air-conditionings of noise To switching device.
Second object of the present invention is to propose the three control air-conditionings with the device.
The refrigerant of three control air-conditionings according to embodiments of the present invention flows to switching device, including:Multiple control valve components, per The individual control valve component is corresponding with multiple indoor heat exchangers of three control air-conditionings, and each described control valve group Part is respectively provided with the first to the 3rd interface, the first interface of each control valve component and the corresponding indoor heat exchanger phase Even, the second interface of each control valve component is connected with the low pressure gas pipe of three control air-conditionings and the 3rd interface and three control sky The high-pressure air pipe of tune is connected, when wherein described indoor heat exchanger is in refrigerating state, the control connected with the indoor heat exchanger The first interface of valve module processed is connected with second interface and first interface and the 3rd interface disconnect, and the indoor heat exchanger is in system During Warm status, the first interface of the control valve component connected with the indoor heat exchanger is disconnected with second interface and first interface With the 3rd orifice, each described control valve component individually controls corresponding indoor heat exchanger refrigeration or heats.
The refrigerant of three control air-conditionings according to embodiments of the present invention flows to switching device, between each control valve component mutually solely Vertical, respectively by controller control, the part in multiple indoor heat exchangers can be freezed and another part is heated. The refrigerant flows to switching device simple structure, easy for installation, and efficiency of assembling is high, improves the practicality that refrigerant flows to switching device Property.
In addition, the refrigerant of three control air-conditioning according to the above embodiment of the present invention flows to switching device, can also have such as Lower additional technical characteristic:
According to one embodiment of present invention, each described control valve component includes the first and second switch valves, described One and second switch valve in each first opening be the first interface, the first switch valve second opening be institute Second interface is stated, the second opening of the second switch valve is the 3rd interface.Thus, the knot of control valve component is simplified Structure, reduces the cost of control valve component.
According to one embodiment of present invention, the control valve component is three-way magnetic valve.Thus, further simplify system The structure of system, is easily installed, and improves installation effectiveness.Additionally, being also convenient for control.
According to one embodiment of present invention, the three control air-conditioning includes height connected with the plurality of indoor heat exchanger Hydraulic fluid pipe, and the high-pressure liquid tube includes:Main high-pressure liquid tube, many sub- high-pressure liquid tubes, expansion valve and cooling tube.Specifically, The two ends of each sub- high-pressure liquid tube are changed with the main high-pressure liquid tube and the interior corresponding with the sub- high-pressure liquid tube respectively Hot device is connected;One end of the expansion valve is connected with the main high-pressure liquid tube;One end of the cooling tube and the expansion valve phase Even and the other end is connected with the low pressure gas pipe, the cooling tube is with carrying out heat exchange respectively with the plurality of sub- high-pressure liquid tube Heat exchanging segment.Thus, increase cooling tube, the refrigerant flowed from high-pressure liquid tube to low pressure gas pipe lower the temperature in the presence of expansion valve and by Cooling tube flows to low pressure gas pipe, and now, cooling tube carries out heat exchange with sub- high-pressure liquid tube, reduces and flows to indoor heat exchanger The temperature of refrigerant, eliminates the phenomenon for flowing to that the refrigerant gas-liquid of indoor heat exchanger coexists, so as to eliminate the swollen of indoor heat exchanger Swollen valve produces the sound for being similar to boiling water, additionally, also improving refrigeration.
According to one embodiment of present invention, the expansion valve is electric expansion valve.Thus, stablizing for system is improve Property, and reduce the energy consumption of system.
According to one embodiment of present invention, pressure-relief valve, the import of the pressure-relief valve and the high-pressure air pipe phase are also included Connect and export and be connected with the low pressure gas pipe.Thus, indoor heat exchanger high pressure gas when refrigeration and heating mode switch are reduced Pressure differential between pipe and low pressure gas pipe, flows to the noise in handoff procedure now so as to reduce refrigerant.
According to one embodiment of present invention, also include to be located between the high-pressure air pipe and the low pressure gas pipe for making Through pressure-relief valve refrigerant from high-pressure air pipe to the check valve of low pressure gas pipe one-way flow.Thus, make refrigerant from high-pressure air pipe to Low pressure gas pipe one-way flow, improves the stability of system.
According to one embodiment of present invention, also include the filter for filtering the refrigerant for flowing through the pressure-relief valve.By This, filters the impurity in refrigerant, reduces the fault rate of system and improve stability.
According to one embodiment of present invention, also include muffler, the muffler is connected to the pressure-relief valve and described Between low pressure gas pipe.Thus, noise create a further reduction.
Three control air-conditionings according to embodiments of the present invention, including three control air-conditionings according to present invention Refrigerant flow to switching device.
Three control air-conditionings according to embodiments of the present invention, are provided with according to the flow direction switching of the refrigerant of present invention Device.Thus, different indoor heat exchanger in three control air-conditionings is allow while freezing and heating, improve three control air-conditionings Performance, simple structure, easy to assembly.Additionally, also reducing the noise during three control air-conditioning uses.
The additional aspect and advantage of the present invention will be set forth in part in the description, and partly will become from the following description Obtain substantially, or recognized by the practice of the present invention.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from the description with reference to accompanying drawings below to embodiment Substantially and easy to understand, wherein:
Fig. 1 is the schematic diagram of the three control air-conditionings of one embodiment of the present of invention;
Fig. 2 is that the refrigerant of the pure refrigeration mode of the three control air-conditionings of one embodiment of the present of invention flows to schematic diagram;
Fig. 3 is that the refrigerant of the pure heating mode of the three control air-conditionings of one embodiment of the present of invention flows to schematic diagram;
Fig. 4 is that the refrigerant of the main refrigeration mode of the three control air-conditionings of one embodiment of the present of invention flows to schematic diagram;
Fig. 5 is that the refrigerant of the main heating mode of the three control air-conditionings of one embodiment of the present of invention flows to schematic diagram.
Wherein, refrigerant flows to switching device 1, control valve component 3, first switch valve 31a, 31b ..., 31f, second switch Valve 32a, 32b ..., 32f, supercooling tube 4a, 4b ..., 4f, expansion valve 5, pressure-relief valve 6, check valve 7, filter 8, muffler 9, high Air pipe 10, low pressure gas pipe 11, high-pressure liquid tube 12, the first connecting tube 14a, 14b ..., 14f, the second connecting tube 13a, 13b ..., 13f, indoor heat exchanger 15a, 15b ..., 15f, outer machine 16, compressor 17, oil eliminator 18, cross valve 19, outdoor heat exchanger 20, electric expansion valve 21, cross valve 22, gas-liquid separator 23.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
In describing the invention, it is to be understood that term " " center ", " longitudinal direction ", " horizontal ", " length ", " width ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward ", " up time The orientation of instruction such as pin ", " counterclockwise " or position relationship are based on orientation shown in the drawings or position relationship, are for only for ease of The description present invention and simplification description, rather than the device or element of instruction or hint indication must be with specific orientation, Yi Te Fixed azimuth configuration and operation, are therefore not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or hint relative importance Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or Implicitly include one or more this feature.In describing the invention, " multiple " are meant that two or more, Unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", " fixation " etc. Term should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or be integrally connected;It can be machine Tool connection, or electrical connection;Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two units Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood as the case may be at this Concrete meaning in bright.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score The first and second feature directly contacts can be included, it is also possible to be not directly contact including the first and second features but by it Between other characterisation contact.And, fisrt feature second feature " on ", " top " and " above " include that first is special Levy directly over second feature and oblique upper, or fisrt feature level height is merely representative of higher than second feature.Fisrt feature exists Second feature " under ", " lower section " and " below " include fisrt feature immediately below second feature and obliquely downward, or be merely representative of Fisrt feature level height is less than second feature.
It is well known that general three control refrigerant flows to switching device following problem:First, general three control refrigerant stream To switching device is lower connected in machine must run same pattern, therefore if require in per platform machine all can unrestricted choice refrigeration, heat Run that and must all join a refrigerant per machine in platform and flow to switching device, and install more complicated;2nd, general three control refrigerant system The different interior machine of system can freeze simultaneously, heating operation, due to heating the condensed liquid refrigerants of interior machine under some bad working environments Degree of supercooling not enough, can pass through the electric expansion valve of machine in refrigeration with the state of gas-liquid two-phase.The refrigerant of gas-liquid two-phase passes through interior machine The sound of similar boiling water can be produced during electric expansion valve, impact user uses, while swollen by electronics with gas-liquid two-phase refrigerant Swollen valve can reduce cold medium flux, affect refrigeration, need improvement badly;3rd, general three control refrigerant flows to switching device, indoor set Before and after the refrigerating/heating magnetic valve being closed before pattern switching, pressure reduction is larger, and during switching, refrigerating/heating magnetic valve is beaten Very big noise can be produced when holding, be unsuitable for user's use, need improvement badly.It is an object of the invention to solving of the prior art Some are difficult.
The refrigerant for describing three control air-conditionings of the embodiment of the present invention with reference to the accompanying drawings in detail flows to switching device.
As shown in figure 1, the refrigerant of three control air-conditionings according to embodiments of the present invention flows to switching device, including:Multiple controls Valve module processed 3 (3a i.e. as shown in Figure 1,3b ...).
Specifically, each control valve component 3 is corresponding with multiple indoor heat exchangers 15 of three control air-conditionings, In other words, each control valve component 3 is all corresponding with an indoor heat exchanger 15, in other words control valve component 3 and indoor heat exchange Device 15 is corresponded.Each control valve component 3 is respectively provided with first interface, second interface and the 3rd interface.Each control valve component 3 First interface and corresponding indoor heat exchanger 15 be connected, the second interface of each control valve component 3 is low with three control air-conditionings Air pipe 11 is connected, and the 3rd interface of the control valve component 3 is connected with the high-pressure air pipe 10 of three control air-conditionings.For example, as Fig. 1 Shown, control valve component 3a has first interface, second interface and the 3rd interface, the first interface of control valve component 3a and interior Heat exchanger 15a be connected, the second interface of control valve component 3a is connected with low pressure gas pipe 11, the 3rd interface of control valve component 3a and High-pressure air pipe 10 is connected.When wherein indoor heat exchanger 15 is in refrigerating state, control valve group connected with the indoor heat exchanger 15 The first interface of part 3 is connected with second interface, and 3 first interface of control valve component and the 3rd interface disconnect.Indoor heat exchanger 15 in when heating state, and the first interface of control valve component 3 connected with the indoor heat exchanger 15 is disconnected with second interface, and The first interface of the control valve component 3 and the 3rd orifice.For example, as shown in figure 1, the first interface of control valve component 3a with When second interface connection and first interface and the 3rd interface disconnect, indoor heat exchanger 15a is in refrigerating state;Control valve component 3a First interface and second interface disconnect and when first interface and three orifice, indoor heat exchanger 15a is in and heats state. Additionally, each control valve component 3 individually controls corresponding indoor heat exchanger 15 to freeze or heat.
The refrigerant of three control air-conditionings according to embodiments of the present invention flows to switching device, between each control valve component 3 mutually Independent, respectively by controller control, the part in multiple indoor heat exchangers 15 can be freezed and another part is entered Row is heated.The refrigerant flows to switching device simple structure, easy for installation, and efficiency of assembling is high, improves refrigerant and flows to switching device Practicality.
Need explanation when, be in pure refrigeration mode in the three control air-conditioning, i.e., multiple indoor heat exchangers 15 are in During refrigerating state, can by the one or more first interface in multiple control valve components 3 respectively with second interface and the 3rd Orifice, to improve the flow efficiency of refrigerant, this is will be understood by for one of ordinary skill in the art.
As shown in Figures 2 to 5, in some embodiments of the invention, each control valve component 3 includes first switch valve 31 With second switch valve 32, each first opening in first switch valve 31 and second switch valve 32 is the first interface, In other words, the first end of first switch valve 31 and second switch valve 32 is connected to form the first interface of the control valve component 3, and first Second opening of switch valve 31 is the second interface, and the second opening of second switch valve 32 is the 3rd interface.Thus, letter Change the structure of control valve component 3, reduce the cost of control valve component 3.
Additionally, the control valve component 3 of the present invention can be three-way magnetic valve.Specifically, the triple valve is connect with first Mouthful, second interface and the 3rd interface, the triple valve can be controlled to connect the first interface of the triple valve and second interface and the One interface and the 3rd interface disconnect, or first interface and the 3rd orifice and first interface and second interface disconnection, with Realize the 3 corresponding indoor heat exchanger 15 of control valve component to freeze or heat.Thus, further simplify the structure of system, just In installation, installation effectiveness is improved.Additionally, being also convenient for control.
As shown in figure 1, the three control air-conditioning includes and 15 connected high-pressure liquid tube 12 of multiple indoor heat exchangers, high pressure liquid Pipe 12 includes:Main high-pressure liquid tube, many sub- high-pressure liquid tubes, expansion valve 5 and cooling tube.Specifically, the main high-pressure liquid tube with The outdoor heat exchanger 20 of three control air-conditionings is connected.The two ends of each sub- high-pressure liquid tube respectively with the main high-pressure liquid tube and with The corresponding indoor heat exchanger 15 of the sub- high-pressure liquid tube is connected, in other words, many sub- high-pressure liquid tubes and multiple indoor heat exchangers 15 1 One corresponds to, and is connected with main high-pressure liquid tube per one end of individual sub- high-pressure liquid tube, and the other end is connected with corresponding indoor heat exchanger 15. Expansion valve 5 is connected with the main high-pressure liquid tube.One end of the cooling tube be connected with expansion valve 5 with by expansion valve 5 with described Main high-pressure liquid tube is connected, and the other end of the cooling tube is connected with low pressure gas pipe 11, and the cooling tube has described with multiple Sub- high-pressure liquid tube carries out the heat exchanging segment of heat exchange respectively.Thus, increase cooling tube, flow from high-pressure liquid tube 12 to low pressure gas pipe 11 Refrigerant is lowered the temperature in the presence of expansion valve 5 and flows to low pressure gas pipe 11 by cooling tube, and now, cooling tube is carried out with sub- high-pressure liquid tube Heat exchange, reduces the temperature of the refrigerant for flowing to indoor heat exchanger 15, eliminates gas in the refrigerant for flowing to indoor heat exchanger 15 The phenomenon that liquid coexists, produces, so as to eliminate expansion valve 5 of the refrigerant indoors in heat exchanger 15, the sound for being similar to boiling water, this Outward, refrigeration is also improved.
As shown in figure 1, the present invention includes multiple supercooling tubes 4 and expansion valve 5, wherein, multiple supercooling tubes 4 are changed with multiple interiors Hot device 15 is corresponded, and each supercooling tube 4 all includes first passage and second channel, and refrigerant is logical in first passage and second respectively In road, flowing is to carry out heat exchange.Specifically, the two ends of the first passage of supercooling tube 4 respectively with high-pressure liquid tube 12 and with the mistake 4 corresponding indoor heat exchanger 15 of cold pipe is connected, and forms the sub- high-pressure liquid tube, and the second channel of multiple supercooling tubes 4 is serially connected To form the cooling tube.
Further, as the stability of electric expansion valve is higher, adaptive temperature is low, the advantages of overheated setting value is adjustable, Therefore, the expansion valve 5 of the present invention is electric expansion valve.Thus, the stability of system is improve, and reduces the energy consumption of system.
Certainly, the expansion valve 5 of the present invention can also be thermal expansion valve.
According to one embodiment of present invention, also include pressure-relief valve 6, the import of pressure-relief valve 6 be connected with high-pressure air pipe 10 and Outlet is connected with low pressure gas pipe 11, is adjusted pressure-relief valve 6 and can be adjusted the cold medium flux flowed to low pressure gas pipe from high-pressure air pipe 10. Thus, it is possible to reduce pressure of the indoor heat exchanger 15 when refrigeration and heating mode switch between high-pressure air pipe 10 and low pressure gas pipe 11 Power is poor, flows to the noise in handoff procedure now so as to reduce refrigerant.
Further, also include check valve 7, check valve 7 is located between high-pressure air pipe 10 and low pressure gas pipe 11, for make through The refrigerant of pressure-relief valve is crossed from high-pressure air pipe to low pressure gas pipe one-way flow.Specifically, check valve 7 is located at pressure-relief valve 6 and low pressure Between tracheae 11, in other words, the entrance of check valve 7 is connected with pressure-relief valve 6 and exports and be connected with low pressure gas pipe 11;Or check valve 7 It is located between high-pressure air pipe 10 and pressure-relief valve 6, in other words, the entrance of check valve 7 is connected with high-pressure air pipe 10 and exports and release Valve 6 is connected.Fig. 1 shows the situation that check valve 7 is located at pressure-relief valve 6 and compresses between tracheae.Thus, refrigerant is made by high-pressure air pipe 10, to 11 one-way flow of low pressure gas pipe, improve the stability of system.
Additionally, also including filter 8, filter 8 is for filtering the refrigerant for flowing through pressure-relief valve 6.Thus, filter in refrigerant Impurity, reduce the fault rate of system and improve stability.
Advantageously, also include muffler 9, muffler 9 is connected between pressure-relief valve 6 and low pressure gas pipe 11.Thus, further Reduce noise.
As shown in figure 1, the refrigerant flowed to low pressure gas pipe from high-pressure air pipe flows separately through pressure-relief valve 6, check valve 7, filters Device 8 and muffler 9.
With reference to the accompanying drawings describe in detail the present invention three control air-conditionings refrigerant flow to switching device structure and its The course of work.
Embodiment 1
Fig. 1 is the three control air-conditioning schematic diagrames of one embodiment of the present of invention.It should be noted that the present embodiment with this three Control air-conditioning is illustrated as a example by having 6 indoor heat exchangers 15.
As shown in figure 1, wherein, refrigerant flows to switching device 1, control valve component 3, first switch valve 31a, 31b ..., 31f, second switch valve 32a, 32b ..., 32f, supercooling tube 4a, 4b ..., 4f, expansion valve 5, pressure-relief valve 6, check valve 7, filter 8, muffler 9, high-pressure air pipe 10, low pressure gas pipe 11, high-pressure liquid tube 12, the first connecting tube 14a, 14b ..., 14f, second connection Pipe 13a, 13b ..., 13f, indoor heat exchanger 15a, 15b ..., 15f, outer machine 16, compressor 17, oil eliminator 18, cross valve 19, outdoor heat exchanger 20, electric expansion valve 21, cross valve 22, gas-liquid separator 23.Wherein, the one of each the first connecting tube 14 End is connected with corresponding indoor heat exchanger 15, and one end of each the second connecting tube 13 is connected with corresponding indoor heat exchanger 15.
Above-mentioned refrigerant is flowed in switching device 1, first switch valve 31a, 31b ..., 31f, second switch valve 32a, 32b ..., 32f, pressure-relief valve 6, expansion valve 5 be connected with controller (not shown) respectively.
With reference to Fig. 2, when the pure refrigeration mode of system operation:That is indoor heat exchanger 15a, 15b ..., 15f only have one or more Refrigeration, during the indoor heat exchanger not heated.For example:When all indoor heat exchangers 15 are refrigerating state, by controller control First switch valve 31a processed, 31b ..., 31f be respectively communicated with, control second switch valve 32a, 32b ..., 32f is respectively communicated with.Outside In machine 16, then high pressure gaseous refrigerant reaches outdoor through cross valve 19 from after the discharge of compressor 17 to oil eliminator 18 Heat exchanger 20 is condensed, and condensed liquid refrigerants is reached cold after the throttling of electric expansion valve 21 again by high-pressure liquid tube 12 Matchmaker flows to switching device 1.
Arrival refrigerant flows to the refrigerant of switching device 1 and will split into two parts.Wherein, Part I liquid refrigerants is by height Hydraulic fluid pipe 12 and the second connecting tube 13a, 13b ..., 13f arrive separately at corresponding indoor heat exchanger 15a, 15b ..., 15f, and Indoor heat exchanger 15a, 15b ..., carry out heat exchange in 15f, then through the first connecting tube 14a, 14b ..., 14f return to refrigerant stream To switching device 1.As first switch valve 31 and second switch valve 32 are all opened, refrigerant flow direction is back to from indoor heat exchanger 15 The refrigerant of switching device 1 is by respectively by first switch valve 31 and second switch valve 32.Wherein, through the cold of first switch valve 31 Matchmaker is back to outer machine 16 by low pressure gas pipe 11;Outer machine is back to by high-pressure air pipe 10 through the refrigerant of second switch valve 32 16.For example, for indoor heat exchanger 15a, flow to refrigerant and the refrigerant of switching device 1 is flowed to through the second connecting tube 13a arrival room Interior heat exchanger 15a, and heat exchange is carried out in heat exchanger 15a indoors, then refrigerant flow direction switching is returned to through the first connecting tube 14a Device 1.As first switch valve 31a and second switch valve 32a are all opened, refrigerant flow direction is back to from indoor heat exchanger 15a and cuts The refrigerant of changing device 1 is passed through first switch valve 31a and second switch valve 32a respectively.Wherein, through first switch valve 31a's Refrigerant is back to outer machine 16 by low pressure gas pipe 11;It is back to by high-pressure air pipe 10 through the refrigerant of second switch valve 32a outer Machine 16.Part II liquid refrigerants flows to expansion valve 5 by high-pressure liquid tube 12, and is throttled by expansion valve 5, after throttling Refrigerant flow through successively supercooling tube 4f ..., 4b, 4a outer machine 16 is back to by low pressure gas pipe 11.Refrigerant through supercooling tube 4a, 4b ..., Heat exchange will be carried out with the refrigerant flowed from high-pressure liquid tube 12 to each indoor heat exchanger during 4f.
The refrigerant for outer machine being back to by low pressure gas pipe 11 reaches gas-liquid separator 23, and passes through high-pressure air pipe 10 and be back to The refrigerant of outer machine 16 reaches gas-liquid separator 23 through cross valve 22.All gaseous coolants after gas-liquid separator 23 is separated It is back to compressor 17 and realizes refrigerant circulation.
With reference to Fig. 3, when the pure heating mode of system operation:That is indoor heat exchanger 15a, 15b ..., 15f only have one or more Heat, when there is no the indoor heat exchanger 15 for freezing.For example:When all indoor heat exchanger 15a, 15b ..., 15f be the state of heating When, by controller control first switch valve 31a, 31b ..., 31f be each turned off, control second switch valve 32a, 32b ..., 32f It is respectively communicated with.Then high pressure gaseous refrigerant passes through height through cross valve 22 from after the discharge of compressor 17 to oil eliminator 18 Air pipe 10 reaches refrigerant and flows to switching device 1.Reach refrigerant the refrigerant of switching device 1 is flowed to respectively through second switch valve 32a, 32b ..., 32f and the first connecting tube 14a, 14b ..., 14f reach corresponding indoor heat exchanger 15a, 15b ..., 15f Condensed.Condensed liquid refrigerants flows to high-pressure liquid tube 12 by the second connecting tube, and flowed back by indoor heat exchanger cold Matchmaker will be through corresponding supercooling tube.For example, illustrate by taking indoor heat exchanger 15a as an example, reach the refrigerant that refrigerant flows to switching device 1 Corresponding indoor heat exchanger 15a condensation is reached through second switch valve 32a and the first connecting tube 14a.Condensed liquid is cold Matchmaker flows to high-pressure liquid tube 12 by the second connecting tube 13a, flows to high-pressure liquid tube 12 through supercooling tube 4a from indoor heat exchanger 15a.
By indoor heat exchanger 15a, 15b ..., 15f is back to the refrigerant of high-pressure liquid tube 12 and is divided into two parts, wherein, first Part refrigerant pass sequentially through after the throttling of expansion valve 5 supercooling tube 4f ..., return to low pressure gas pipe 11 after 4b, 4a, and pass through low pressure Tracheae 11 is back to outer machine 16.Refrigerant flow through supercooling tube 4a, 4b ..., 4f when, high pressure liquid will be flowed to from indoor heat exchanger 15 The refrigerant of pipe 12 carries out heat exchange at corresponding supercooling tube.Part II refrigerant is back to outer machine 16 by high-pressure liquid tube 12.
The refrigerant for outer machine 16 being back to by low pressure gas pipe 11 flows to gas-liquid separator 23, and passes through high-pressure liquid tube 12 and flow back Refrigerant to outer machine 16 reaches outdoor heat exchanger 20, and carries out heat exchange in outdoor heat exchanger 20, is then reached by cross valve 19 Gas-liquid separator 23.All gaseous coolants after gas-liquid separator 23 is separated return to the compression of compressor 17 and realize refrigerant and follow Ring.
With reference to Fig. 4, when the main refrigeration mode of three control operation of air conditioner:That is indoor heat exchanger 15a, 15b ..., in 15f at least One refrigeration and at least one heat, and refrigeration demand be more than heating needs.For example:When indoor heat exchanger 15a, 15b ..., 15e operation refrigeration, indoor heat exchanger 15f operation is when heating, by controller control first switch valve 31a, 31b ..., 31e is respectively communicated with, second switch valve 32a, 32b ..., 32e is each turned off;Disconnected by controller control first switch valve 31f, the Two switch valve 32f are connected.
HTHP refrigerant is from after the discharge of compressor 17 to oil eliminator 18.The refrigerant flowed out from oil eliminator 18 is classified into Two parts.A part of refrigerant therein reaches outdoor heat exchanger 20 through cross valve 19 and is condensed, condensed liquid refrigerants Again refrigerant is reached by high-pressure liquid tube 12 after electric expansion valve 21 throttles and flow to switching device 1;Another part is through four-way Refrigerant is flowed to by high-pressure air pipe 10 after valve 22 and flow to switching device 1.
The part in refrigerant in high-pressure liquid tube 12 by respectively the second connecting tube 13a, 13b ..., 13e reach corresponding Indoor heat exchanger 15a, 15b ..., 15e, refrigerant indoors heat exchanger 15a, 15b ..., after 15e carries out heat exchange refrigeration, pass through First connecting tube 14a, 14b ..., 14e return to refrigerant and flow to switching device 1, then by first switch valve 31a, 31b ..., Outer machine 16 is back to through low pressure gas pipe 11 after 31e.For example, for indoor heat exchanger 15a, in the refrigerant in high-pressure liquid tube 12 A part reaches indoor heat exchanger 15a by the second connecting tube 13a, and refrigerant is after heat exchanger 15a carries out heat exchange refrigeration indoors, warp Cross the first connecting tube 14a and return to refrigerant and switching device 1 is flowed to, then through low pressure gas pipe 11 times after the first switch valve 31a It flow to outer machine 16.
Another part refrigerant in high-pressure liquid tube 12 through expansion valve 5 throttling after pass sequentially through supercooling tube 4f ..., 4b, 4a Outer machine 16 is back to afterwards through low pressure gas pipe 11.Refrigerant through supercooling tube 4a, 4b ..., 4f when, will with flow from high-pressure liquid tube 12 To indoor heat exchanger 15a, 15b ..., the refrigerant of 15e carry out heat exchange.
Refrigerant in high-pressure air pipe 10 reaches indoor heat exchanger 15f through second switch valve 32f, the first connecting tube 14f and enters Row condensation.Condensed liquid refrigerants flows to high-pressure liquid tube 12 by the second connecting tube 13f, will enter when through supercooling tube 4f Row supercooling cooling.The refrigerant for flowing to high-pressure liquid tube 12 will be collected with the refrigerant in high-pressure liquid tube 12, and with high-pressure liquid tube 12 Refrigerant flow to low pressure gas pipe 11 together along the refrigerant in aforementioned high-pressure liquid tube 12, and outer machine is back to by low pressure gas pipe 11 16.
The refrigerant flowed back by low pressure gas pipe 11 reaches gas-liquid separator 23, all cold after gas-liquid separator 23 is separated Matchmaker returns to the compression of compressor 17 and realizes refrigerant circulation.
With reference to Fig. 5, when the main heating mode of system operation:That is indoor heat exchanger 15a, 15b ..., the refrigeration of 15f at least And at least one heat, and heating needs are more than refrigeration demand.For example:When indoor heat exchanger 15a, 15b ..., 15e operation Heat, during indoor heat exchanger 15f operation refrigeration, by controller control first switch valve 31a, 31b ..., 31e be each turned off, the Two switch valve 32a, 32b ..., 32e is respectively communicated with;By controller control first switch valve 31f connection, second switch valve 32f breaks Open.
Then high pressure gaseous refrigerant passes through high pressure through cross valve 22 from after the discharge of compressor 17 to oil eliminator 18 Tracheae 10 reaches refrigerant and flows to switching device 1, then through second switch valve 32a, 32b ..., 32e connects by corresponding first Pipe 14a, 14b ..., 14e reach indoor heat exchanger 15a, 15b ..., 15e carry out heat exchange.Liquid refrigerants after heat exchange is through second Connecting tube 13a, 13b ..., be back to high-pressure liquid tube 12 after 13e.The refrigerant for being back to high-pressure liquid tube 12 will be shunted.For example, By taking indoor heat exchanger 15a as an example, the refrigerant in high-pressure air pipe 10 is arrived by the first connecting tube 14a after second switch valve 32a Reaching indoor heat exchanger 15a carries out heat exchange.Liquid refrigerants after heat exchange is back to high-pressure liquid tube 12 after the second connecting tube 13a.
Wherein, Part I refrigerant pass sequentially through after the throttling of expansion valve 5 supercooling tube 4f ..., return to low pressure after 4b, 4a Tracheae 11.Refrigerant flow through supercooling tube 4a, 4b ..., 4f when, will with from indoor heat exchanger 15a, 15b ..., 15e be back to high pressure The refrigerant of liquid pipe 12 carries out heat exchange.
Part II refrigerant carries out supercooling cooling by supercooling tube 4f, then reaches interior through the second connecting tube 13f and changes Hot device 15f, then returns to refrigerant through the first connecting tube 14f and flows to switching device 1.Then flowed to by first switch valve 31f Low pressure gas pipe 11, and by reaching gas-liquid separator 23 with low pressure gas pipe 11.
Part III refrigerant carries out heat exchange by reaching outdoor heat exchanger 20 after high-pressure liquid tube 12, the gaseous coolant after heat exchange Gas-liquid separator 23 is reached by cross valve 19.
The refrigerant for reaching gas-liquid separator 23 carries out Oil-gas Separation, and all gaseous coolants after separating return to compressor 17 and press Refrigerant circulation is realized in contracting.
Embodiment 2
With reference to Fig. 1, when indoor heat exchanger 15a, 15b ..., 15f have refrigeration or heating mode to run when, refrigerant flow direction switching The controller of device 1 will start supercooling control function.
Further, above-mentioned expansion valve 5 can require to open according to controller, and operative liquid refrigerant is passed through from high-pressure liquid tube 12 Expansion valve 5 returns to low pressure gas pipe 11 after sequentially passing through supercooling tube 4f, 4e, 4d, 4c, 4b, 4a evaporation endothermic after throttling.Indoor heat exchange Device 15a, 15b ..., 15f correspond to liquid pipe refrigerant through supercooling tube 4a, 4b ..., reach supercooled state after 4f cooling, refrigerant is pure Liquid status.
Further, the refrigerant of the pure liquid after supercooling through corresponding refrigeration indoor heat exchanger 15a, 15b ..., 15f Electric expansion valve when will not produce the sound of similar boiling water again, improve the sound quality of indoor heat exchanger, and pure liquid Refrigerant can increase through the flow of electric expansion valve, while also improving refrigeration.
Embodiment 3
With reference to Fig. 1, when indoor heat exchanger pattern needs switching, such as refrigeration mode is switched to heating mode, and it is right first to close Answer the first switch valve 31a of indoor heat exchanger, 31b ..., 31f, while open pressure-relief valve 6 to carry out release, high-low pressure pressure after 30 seconds Difference can reduce at this moment open again the second switch valve 32a of corresponding indoor heat exchanger, 32b ..., 32f, switch to heating mode, with When close pressure-relief valve 6.As sound is also less during the less therefore switching of high-low pressure pressure reduction during switching, the mesh for reducing commutation noise is reached 's.
Further, when in above-mentioned handoff procedure, pressure-relief valve 6 is opened, can equally produce relatively as high-low pressure pressure reduction is larger Big sound, therefore pressure-relief valve of the present invention 6 uses small-bore magnetic valve, can reduce cold medium flux during release, so as to subtract Noise during little release.While filter 8, muffler 9 is mounted with after pressure-relief valve 6, can reach the purpose for reducing noise further.
Three control air-conditionings according to embodiments of the present invention, including according to present invention for three control air-conditionings Refrigerant flow to switching device.
Three control air-conditionings according to embodiments of the present invention, three control air-conditionings being provided with according to present invention Refrigerant flows to switching device.Thus, different indoor heat exchangers 15 in three control air-conditionings are allow while freezing and heating, improves The performance of three control air-conditionings, simple structure, easy to assembly.Additionally, during also reducing three control air-conditioning uses Noise.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or the spy described with reference to the embodiment or example Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not Identical embodiment or example are necessarily referred to.And, the specific features of description, structure, material or feature can be any One or more embodiments or example in combine in an appropriate manner.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art is in the principle without departing from the present invention and objective In the case of above-described embodiment can be changed within the scope of the invention, change, replace and modification.

Claims (9)

1. a kind of refrigerant of three control air-conditioning flows to switching device, it is characterised in that include:
Multiple control valve components, each described control valve component are relative with multiple indoor heat exchangers of three control air-conditionings Should, and each described control valve component is respectively provided with the first to the 3rd interface, the first interface of each control valve component with right The indoor heat exchanger that answers is connected, and the second interface of each control valve component is connected with the low pressure gas pipe of three control air-conditionings And the 3rd interface be connected with the high-pressure air pipe of three control air-conditionings, wherein
When the indoor heat exchanger is in refrigerating state, the first interface of the control valve component connected with the indoor heat exchanger Connect with second interface and first interface and the 3rd interface disconnect, and
The indoor heat exchanger is in when heating state, the first interface of the control valve component connected with the indoor heat exchanger With second interface disconnect and first interface and the 3rd orifice, and each described control valve component individually control corresponding described Indoor heat exchanger freezes or heats;
Also include pressure-relief valve, the import of the pressure-relief valve is connected with the high-pressure air pipe and exports and is connected with the low pressure gas pipe.
2. the refrigerant of three control air-conditioning according to claim 1 flows to switching device, it is characterised in that each described control Valve module includes the first and second switch valves, and each first opening in first and second switch valve is described first Interface, the second opening of the first switch valve is the second interface, and the second opening of the second switch valve is described the Three interfaces.
3. the refrigerant of three control air-conditioning according to claim 1 flows to switching device, it is characterised in that the control valve group Part is three-way magnetic valve.
4. the refrigerant of three control air-conditioning according to claim 1 flows to switching device, it is characterised in that three control is empty Stealthily substitute and high-pressure liquid tube connected with the plurality of indoor heat exchanger respectively is included, and the high-pressure liquid tube includes:
Main high-pressure liquid tube;
Many sub- high-pressure liquid tubes, the two ends of each sub- high-pressure liquid tube respectively with the main high-pressure liquid tube and with the sub- high pressure liquid Manage the corresponding indoor heat exchanger to be connected;
Expansion valve, one end of the expansion valve are connected with the main high-pressure liquid tube;With
Cooling tube, one end of the cooling tube is connected with the expansion valve and the other end is connected with the low pressure gas pipe, described cold But pipe has the heat exchanging segment for carrying out heat exchange with the plurality of sub- high-pressure liquid tube respectively.
5. the refrigerant of three control air-conditioning according to claim 4 flows to switching device, it is characterised in that the expansion valve is Electric expansion valve.
6. the refrigerant of three control air-conditioning according to claim 1 flows to switching device, it is characterised in that also include unidirectional Valve, the check valve are located between the high-pressure air pipe and the pressure-relief valve or use between the pressure-relief valve and the low pressure gas pipe In making the refrigerant through the pressure-relief valve from high-pressure air pipe to low pressure gas pipe one-way flow.
7. the refrigerant of three control air-conditioning according to claim 1 flows to switching device, it is characterised in that also include for mistake Filter flows through the filter of the refrigerant of the pressure-relief valve.
8. the refrigerant of three control air-conditioning according to claim 1 flows to switching device, it is characterised in that:Also include noise reduction Device, the muffler are connected between the pressure-relief valve and the low pressure gas pipe.
9. a kind of three control air-conditioning, it is characterised in that include three control air-conditionings according to any one of claim 1-8 Refrigerant flows to switching device.
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CN103940139A (en) * 2014-04-15 2014-07-23 珠海格力电器股份有限公司 Heat recovery multi-split machine and control method
CN106801942B (en) * 2017-02-27 2020-11-13 广东美的暖通设备有限公司 Air conditioning system and control method thereof
CN106931547B (en) * 2017-03-29 2020-01-07 广东美的暖通设备有限公司 Air conditioning system and control method thereof
CN108036551A (en) * 2017-12-18 2018-05-15 广东美的暖通设备有限公司 Switching device and there is its multi-gang air-conditioner
CN109631424A (en) * 2018-12-06 2019-04-16 珠海格力电器股份有限公司 Coolant distributor, three-pipe heating and reclaiming air-conditioning system and its control method
CN112344440A (en) * 2019-08-08 2021-02-09 安徽美芝精密制造有限公司 Pipeline assembly of air conditioner indoor unit and air conditioner indoor unit
CN110726225B (en) * 2019-10-12 2021-01-05 广东美的暖通设备有限公司 Multi-split system and control method thereof
CN112178893A (en) * 2020-09-22 2021-01-05 广东美的暖通设备有限公司 Air conditioner, control method, and computer-readable storage medium

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