CN104019595A - Outdoor unit of air conditioner and control method for air conditioner - Google Patents
Outdoor unit of air conditioner and control method for air conditioner Download PDFInfo
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- CN104019595A CN104019595A CN201410289024.3A CN201410289024A CN104019595A CN 104019595 A CN104019595 A CN 104019595A CN 201410289024 A CN201410289024 A CN 201410289024A CN 104019595 A CN104019595 A CN 104019595A
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- control assembly
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- conditioner
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Abstract
The invention provides an outdoor unit of an air conditioner and a control method for the air conditioner. The outdoor unit of the air conditioner comprises a compressor, a four-way valve, a first heat exchanger, a gas-liquid separator, a second heat exchanger and a first control part, wherein the four-way valve is connected with an exhausting opening of the compressor; the first heat exchanger is connected between the four-way valve and a check valve of the outdoor unit; the gas-liquid separator is connected between the four-way valve and a first air inlet of the compressor; the first end of the second heat exchanger is connected to the gas-liquid separator through a first pipeline; the first end of the first control part is connected to an any position between the first heat exchanger and the check valve of the outdoor unit; the second end of the first control part is connected to the second end of the second heat exchanger and is used for controlling the cold medium amount flowing through the second heat exchanger. According to the technical scheme, a liquid returning condition of the compressor is avoided under the precondition that the defrosting time of the air conditioner is shortened, and a system is safe and reliable.
Description
Technical field
The present invention relates to air-conditioner technical field, in particular to a kind of control method of off-premises station and a kind of air-conditioner of air-conditioner.
Background technology
At present, the defrost mode of air-conditioner is generally that refrigerant enters outdoor heat exchanger condensation defrost from compressor discharge currents, then turns back to compressor after entering indoor heat exchanger evaporation.But, because refrigerant need to pass through whole air-conditioner system, cause defrost consuming time longer, affect the heating effect of air-conditioner.
For the problems referred to above, in correlation technique, having proposed increases a technical scheme that refrigerant branch road is directly got back to the low-pressure inlet of compressor from condensator outlet, although shortened the defrost time, but may increase compressor return liquid, cause the discharge superheat of compressor low, affect the security reliability of system.
Therefore, how shortening under the prerequisite of air-conditioner defrost time, avoiding compressor to occur back the situation of liquid, that guarantees system safe and reliablely becomes technical problem urgently to be resolved hurrily.
Summary of the invention
The present invention is intended at least solve one of technical problem existing in prior art or correlation technique.
For this reason, one object of the present invention has been to propose a kind of can shortening under the prerequisite of air-conditioner defrost time, avoids compressor to occur back the situation of liquid, guarantees the off-premises station of the reliable air-conditioner of security of system.
Another object of the present invention is the corresponding control method that proposes a kind of air-conditioner.
For achieving the above object, embodiment according to a first aspect of the invention, has proposed a kind of off-premises station of air-conditioner, comprising: compressor; Cross valve, is connected to the exhaust outlet of described compressor; First Heat Exchanger, is connected between described cross valve and off-premises station stop valve; Gas-liquid separator, is connected between the first air inlet of described cross valve and described compressor; The second heat exchanger, the first end of described the second heat exchanger is connected to described gas-liquid separator by the first pipeline; And first control assembly, the first end of described the first control assembly is connected to the optional position between described First Heat Exchanger and described off-premises station stop valve, the second end of described the first control assembly is connected to the second end of described the second heat exchanger, for the coolant quantity of described the second heat exchanger of flowing through is controlled.
The off-premises station of air-conditioner according to an embodiment of the invention, by the first end of the second heat exchanger is connected to gas-liquid separator, the second end of the second heat exchanger is connected to the optional position between First Heat Exchanger and off-premises station stop valve by the first control assembly, on the major trunk roads that make it possible to flow at off-premises station refrigerant, increase a branch road and directly get back to compressor after by the second heat exchanger and gas-liquid separator, shorten refrigerant and got back to the time of compressor, thereby shortened the defrost time of air-conditioner; Meanwhile, owing to being to get back in compressor by after the second heat exchanger through the refrigerant after First Heat Exchanger, therefore, the second heat exchanger can evaporate refrigerant, avoids occurring back liquid situation in compressor, has strengthened the security and stability of system.
In addition, the off-premises station of air-conditioner according to the above embodiment of the present invention, can also have following additional technical characterictic:
According to one embodiment of present invention, the first end of described the second heat exchanger is connected to the second air inlet of described compressor by second pipe; The off-premises station of described air-conditioner also comprises: the second control assembly, is arranged on described the first pipeline, for the coolant quantity of flowing through described the second heat exchanger and enter described gas-liquid separator is controlled; The 3rd control assembly, is arranged on described second pipe, for the coolant quantity of flowing through described the second heat exchanger and enter the second air inlet of described compressor is controlled.
The off-premises station of air-conditioner according to an embodiment of the invention, the first air inlet of above-mentioned compressor is the low-pressure admission mouth of compressor, compress into gas port in compressor has simultaneously time, can flow into compressor by being divided into two parts through the refrigerant after the second heat exchanger, close at the second control assembly, the 3rd control assembly is while opening, refrigerant enters second air inlet (compressor in compress into gas port) of compressor by second pipe; Open at the second control assembly, when the 3rd control assembly is closed, refrigerant enters the first air inlet of getting back to compressor after gas-liquid separator by the first pipeline.
According to one embodiment of present invention, also comprise: pressure sensor, is arranged on the optional position on the pipeline between the first air inlet of described the second control assembly and described compressor.
The off-premises station of air-conditioner according to an embodiment of the invention, by pressure sensor being set on the pipeline between the first air inlet of the second control assembly and compressor, with the force value detecting according to pressure sensor, the first control assembly, the second control assembly and the 3rd control assembly are controlled, can be guaranteed the stability of system.
According to one embodiment of present invention, described the first control assembly, described the second control assembly and described the 3rd control assembly comprise: electric expansion valve or magnetic valve.
The off-premises station that the invention allows for another kind of air-conditioner, comprising: compressor, cross valve, is connected to the exhaust outlet of described compressor, gas-liquid separator, is connected between the first air inlet of described cross valve and described compressor, First Heat Exchanger, the first end of described First Heat Exchanger is connected to described cross valve, the second heat exchanger, the first end of described the second heat exchanger and the second end are connected to respectively the second end and the off-premises station stop valve of described First Heat Exchanger, the 3rd end of described the second heat exchanger is connected to the optional position between the second end and the described off-premises station stop valve of described the second heat exchanger by the first control assembly, the 4th end of described the second heat exchanger is connected to described gas-liquid separator by the first pipeline, wherein, the second end of the first end of described the second heat exchanger and described the second heat exchanger is first flow in described the second heat exchanger internal communication, the 3rd end of described the second heat exchanger and the 4th end of described the second heat exchanger are the second runner in described the second heat exchanger internal communication, described first flow is not communicated with in described the second heat exchanger inside with described the second runner, and described the first control assembly, for the coolant quantity of described the second heat exchanger of flowing through is controlled.
The off-premises station of air-conditioner according to an embodiment of the invention, by the first end of the second heat exchanger and the second end being connected to respectively to the second end and the off-premises station stop valve of First Heat Exchanger, and the 3rd end of the second heat exchanger is connected to the optional position between the second end and the off-premises station stop valve of the second heat exchanger by the first control assembly, and the 4th end of the second heat exchanger is connected to gas-liquid separator, on the major trunk roads that make it possible to flow at off-premises station refrigerant, increase a branch road and directly get back to compressor after by the second heat exchanger and gas-liquid separator, shorten the time that refrigerant is got back to compressor, thereby shorten the defrost time of air-conditioner, meanwhile, branch road refrigerant by getting back in compressor after the second heat exchanger evaporation, can be avoided occurring back liquid situation in compressor, strengthen the security and stability of system.
According to one embodiment of present invention, the 4th end of described the second heat exchanger is connected to the second air inlet of described compressor by second pipe; The off-premises station of described air-conditioner also comprises: the second control assembly, is arranged on described the first pipeline, for the coolant quantity of flowing through described the second heat exchanger and enter described gas-liquid separator is controlled; The 3rd control assembly, is arranged on described second pipe, for the coolant quantity of flowing through described the second heat exchanger and enter the second air inlet of described compressor is controlled.
The off-premises station of air-conditioner according to an embodiment of the invention, the first air inlet of above-mentioned compressor is the low-pressure admission mouth of compressor, compress into gas port in compressor has simultaneously time, can flow into compressor by being divided into two parts through the refrigerant after the second heat exchanger, close at the second control assembly, the 3rd control assembly is while opening, refrigerant enters second air inlet (compressor in compress into gas port) of compressor by second pipe; Open at the second control assembly, when the 3rd control assembly is closed, refrigerant enters the first air inlet of getting back to compressor after gas-liquid separator by the first pipeline.
According to one embodiment of present invention, also comprise: pressure sensor, is arranged on the optional position on the pipeline between the first air inlet of described the second control assembly and described compressor.
The off-premises station of air-conditioner according to an embodiment of the invention, by pressure sensor being set on the pipeline between the first air inlet of the second control assembly and compressor, with the force value detecting according to pressure sensor, the first control assembly, the second control assembly and the 3rd control assembly are controlled, can be guaranteed the stability of system.
According to one embodiment of present invention, described the first control assembly, described the second control assembly and described the 3rd control assembly also can comprise: electric expansion valve or magnetic valve.
According to one embodiment of present invention, described the second heat exchanger comprises: plate type heat exchanger or double pipe heat exchanger.
According to a second aspect of the invention, proposed a kind of control method of air-conditioner, for above-described embodiment only being comprised to the off-premises station of the air-conditioner of the first control assembly controls, the control method of described air-conditioner comprises: judge whether to receive defrosting instruction; In the time that judgement receives described defrosting instruction, control described the first control assembly in opening, directly enter the first air inlet of described compressor after by described the second heat exchanger to control part refrigerant after described First Heat Exchanger.
The control method of air-conditioner according to an embodiment of the invention, by in the time receiving defrosting instruction, control the first control assembly in opening, on the major trunk roads that make it possible to flow at off-premises station refrigerant, increase a branch road and directly get back to compressor after by the second heat exchanger and gas-liquid separator, shorten refrigerant and got back to the time of compressor, thereby shortened the defrost time of air-conditioner; Meanwhile, the second heat exchanger can evaporate branch road refrigerant, avoids occurring back liquid situation in compressor, has strengthened the security and stability of system.
The invention allows for a kind of control method of air-conditioner, for above-described embodiment is comprised to the off-premises station of the air-conditioner of the first control assembly, the second control assembly, the 3rd control assembly and pressure sensor controls, the control method of described air-conditioner comprises: judge whether to receive defrosting instruction; In the time that judgement receives described defrosting instruction, control described the first control assembly and described the second control assembly in opening, and control described the 3rd control assembly in closed condition, to control the first air inlet that enters described compressor by the refrigerant of described the second heat exchanger after described gas-liquid separator; Obtain the force value that described pressure sensor detects; When the force value detecting at described pressure sensor reaches predetermined value, control described the second control assembly in closed condition, and control described the first control assembly and described the 3rd control assembly in opening, to control the second air inlet that enters described compressor by the refrigerant of described the second heat exchanger.
According to the control method of embodiments of the invention air-conditioner, by in the time receiving defrosting instruction, control the first control assembly in opening, on the major trunk roads that make it possible to flow at off-premises station refrigerant, increase a branch road and get back to compressor (directly get back to the second air inlet of compressor or get back to the first air inlet of compressor by gas-liquid separator) after by the second heat exchanger, shorten refrigerant and got back to the time of compressor, thereby shortened the defrost time of air-conditioner; Meanwhile, the second heat exchanger can evaporate branch road refrigerant, avoids occurring back liquid situation in compressor, has strengthened the security and stability of system.
Wherein, the first air inlet of compressor can be low-pressure admission mouth, the second air inlet is compressed into gas port in can being, and by the time receiving defrosting instruction, first control the first control assembly and the second control assembly in opening and control the 3rd control assembly in closed condition, make refrigerant first to return to compressor by low-pressure admission mouth, and in the time that pressure sensor detects that the pressure of low-pressure inlet reaches certain value, control the first control assembly and the 3rd control assembly in opening and control the second control assembly in closed condition, so that refrigerant by compress into gas port and return to compressor, and then guarantee the stability of compressor internal pressure.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Brief description of the drawings
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination is understood becoming the description of embodiment obviously and easily, wherein:
Fig. 1 shows the structural representation of the off-premises station of air-conditioner according to an embodiment of the invention;
Fig. 2 shows the structural representation of the off-premises station of air-conditioner according to another embodiment of the invention;
Fig. 3 shows the structural representation of the off-premises station of air-conditioner according to still another embodiment of the invention;
Fig. 4 shows the structural representation of the off-premises station of air-conditioner according to still a further embodiment;
Fig. 5 shows the schematic flow diagram of the control method of air-conditioner according to an embodiment of the invention;
Fig. 6 shows the schematic flow diagram of the control method of air-conditioner according to another embodiment of the invention.
Detailed description of the invention
In order more clearly to understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, in the situation that not conflicting, the feature in the application's embodiment and embodiment can combine mutually.
A lot of details are set forth in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not subject to the restriction of following public specific embodiment.
Fig. 1 shows the structural representation of the off-premises station of air-conditioner according to an embodiment of the invention.
As shown in Figure 1, the off-premises station of air-conditioner according to an embodiment of the invention, comprising: compressor 1; Cross valve 2, is connected to the exhaust outlet 11 of described compressor 1; First Heat Exchanger 3, is connected between described cross valve 2 and off-premises station stop valve 4; Gas-liquid separator 7, is connected between the first air inlet 12 of described cross valve 2 and described compressor 1; The second heat exchanger 6, the first end of described the second heat exchanger 6 is connected to described gas-liquid separator 7 by the first pipeline; And first control assembly 5, the first end of described the first control assembly 5 is connected to the optional position between described First Heat Exchanger 3 and described off-premises station stop valve 4, the second end of described the first control assembly 5 is connected to the second end of described the second heat exchanger 6, for the coolant quantity of described the second heat exchanger 6 of flowing through is controlled.
By the first end of the second heat exchanger 6 is connected to gas-liquid separator 7, the second end of the second heat exchanger 6 is connected to the optional position between First Heat Exchanger 3 and off-premises station stop valve 4 by the first control assembly 5, on the major trunk roads that make it possible to flow at off-premises station refrigerant, increase a branch road by directly getting back to compressor 1 after the second heat exchanger 6 and gas-liquid separator 7, shorten refrigerant and got back to the time of compressor 1, thereby shortened the defrost time of air-conditioner; Meanwhile, branch road refrigerant is that therefore, the second heat exchanger 6 can evaporate refrigerant, avoids the interior appearance of compressor 1 to return liquid situation, has strengthened the security and stability of system by getting back in compressor 1 after the second heat exchanger 6.
As shown in Figure 2, the first end of described the second heat exchanger 6 is connected to the second air inlet 13 of described compressor 1 to the structure of the off-premises station of air-conditioner according to another embodiment of the invention by second pipe; The off-premises station of described air-conditioner also comprises: the second control assembly 8, is arranged on described the first pipeline, for the coolant quantity of flowing through described the second heat exchanger 6 and enter described gas-liquid separator 7 is controlled; The 3rd control assembly 9, is arranged on described second pipe, for the coolant quantity of flowing through described the second heat exchanger 6 and enter the second air inlet of described compressor 1 is controlled.
The first air inlet 12 of above-mentioned compressor 1 can be the low-pressure admission mouth of compressor 1, compress into gas port in compressor 1 has simultaneously time, can flow into compressor 1 by being divided into two parts through the refrigerant after the second heat exchanger 6, close at the second control assembly 8, the 3rd control assembly 9 is while opening, refrigerant enters second air inlet 13 (as compressed into gas port in compressor 1) of compressor 1 by second pipe; Open at the second control assembly 8, when the 3rd control assembly 9 is closed, refrigerant enters the first air inlet 12 of getting back to compressor 1 after gas-liquid separator 7 by the first pipeline.
The off-premises station of the air-conditioner of above-described embodiment, also comprises: pressure sensor (not shown), is arranged on the optional position on the pipeline between described the second control assembly 8 and the first air inlet 12 of described compressor 1.
By pressure sensor being set on the pipeline between the first air inlet 12 of the second control assembly 8 and compressor 1, make it possible to the pressure of compressor 1 first air inlet 12 to control, to guarantee the stability of system.
According to one embodiment of present invention, described the first control assembly 5, described the second control assembly 8 and described the 3rd control assembly 9 comprise: electric expansion valve or magnetic valve.
Fig. 3 also shows the structural representation of the off-premises station of the air-conditioner of another embodiment of the present invention.
Particularly, as shown in Figure 3, the off-premises station of air-conditioner according to still another embodiment of the invention, comprising: compressor 1, cross valve 2, is connected to the exhaust outlet 11 of described compressor 1, gas-liquid separator 7, is connected between the first air inlet 12 of described cross valve 2 and described compressor 1, First Heat Exchanger 3, the first end of described First Heat Exchanger 3 is connected to described cross valve 2, the second heat exchanger 6, the first end of described the second heat exchanger 6 and the second end are connected to respectively the second end and the off-premises station stop valve 4 of described First Heat Exchanger 3, the 3rd end of described the second heat exchanger 6 is connected to the optional position between the second end and the described off-premises station stop valve 4 of described the second heat exchanger 6 by the first control assembly 5, the 4th end of described the second heat exchanger 6 is connected to described gas-liquid separator 7 by the first pipeline, wherein, the second end of the first end of described the second heat exchanger 6 and described the second heat exchanger 6 is first flow in described the second heat exchanger 6 internal communication, the 3rd end of described the second heat exchanger 6 and the 4th end of described the second heat exchanger 6 are the second runner in described the second heat exchanger 6 internal communication, described first flow is not communicated with in described the second heat exchanger 6 inside with described the second runner, and described the first control assembly 5, for the coolant quantity of described the second heat exchanger 6 of flowing through is controlled.
By the first end of the second heat exchanger 6 and the second end being connected to respectively to the second end and the off-premises station stop valve 4 of First Heat Exchanger 3, and the 3rd end of the second heat exchanger 6 is connected to the optional position between the second end and the off-premises station stop valve 4 of the second heat exchanger 6 by the first control assembly 5, and the 4th end of the second heat exchanger 6 is connected to gas-liquid separator 7, on the major trunk roads that make it possible to flow at off-premises station refrigerant, increase a branch road by directly getting back to compressor 1 after the second heat exchanger 6 and gas-liquid separator 7, shorten the time that refrigerant is got back to compressor 1, thereby shorten the defrost time of air-conditioner, meanwhile, branch road refrigerant, by getting back in compressor 1 after the second heat exchanger 6 evaporations, therefore, also can avoid the interior appearance of compressor 1 to return liquid situation, has strengthened the security and stability of system.
As shown in Figure 4, the 4th end of described the second heat exchanger 6 is connected to the second air inlet 13 of described compressor 1 to the structure of the off-premises station of air-conditioner according to still a further embodiment by second pipe; The off-premises station of described air-conditioner also comprises: the second control assembly 8, is arranged on described the first pipeline, for the coolant quantity of flowing through described the second heat exchanger 6 and enter described gas-liquid separator 7 is controlled; The 3rd control assembly 9, is arranged on described second pipe, for the coolant quantity of flowing through described the second heat exchanger 6 and enter the second air inlet 13 of described compressor 1 is controlled.
The first air inlet 12 of above-mentioned compressor 1 can be the low-pressure admission mouth of compressor 1, compress into gas port in compressor 1 has simultaneously time, can flow into compressor 1 by being divided into two parts through the refrigerant after the second heat exchanger 6, close at the second control assembly 8, the 3rd control assembly 9 is while opening, refrigerant enters second air inlet 13 (as compressed into gas port in compressor 1) of compressor 1 by second pipe; Open at the second control assembly 8, when the 3rd control assembly 9 is closed, refrigerant enters the first air inlet 12 of getting back to compressor 1 after gas-liquid separator 7 by the first pipeline.
The off-premises station of the air-conditioner of above-described embodiment, also comprises: pressure sensor (not shown), is arranged on the optional position on the pipeline between described the second control assembly 8 and the first air inlet 12 of described compressor 1.
By pressure sensor being set on the pipeline between the first air inlet 12 of the second control assembly 8 and compressor 1, make it possible to the pressure of compressor 1 first air inlet 12 to control, to guarantee the stability of system.
According to one embodiment of present invention, described the first control assembly 5, described the second control assembly 8 and described the 3rd control assembly 9 also can comprise: electric expansion valve or magnetic valve.
According to one embodiment of present invention, described the second heat exchanger 6 comprises: plate type heat exchanger or double pipe heat exchanger.
For the structure of the off-premises station of air-conditioner as shown in figures 1 and 3, the present invention proposes a kind of control method of air-conditioner, specifically as shown in Figure 5.
Fig. 5 shows the schematic flow diagram of the control method of air-conditioner according to an embodiment of the invention.
As shown in Figure 5, the control method of air-conditioner according to an embodiment of the invention, comprising: step 502, judges whether to receive defrosting instruction; Step 504, in the time that judgement receives described defrosting instruction, control described the first control assembly 5 in opening, directly enter the first air inlet 12 of described compressor 1 to control part refrigerant after described First Heat Exchanger 3 after by described the second heat exchanger 6.
By in the time receiving defrosting instruction, control the first control assembly 5 in opening, on the major trunk roads that make it possible to flow at off-premises station refrigerant, increase a branch road by directly getting back to compressor 1 after the second heat exchanger 6 and gas-liquid separator 7, shorten refrigerant and got back to the time of compressor 1, thereby shortened the defrost time of air-conditioner; Meanwhile, because through the refrigerant after First Heat Exchanger 3 being gets back in compressor 1 by the second heat exchanger 6 afterwards, therefore, the second heat exchanger 6 can evaporate refrigerant, avoids the interior appearance of compressor 1 to return liquid situation, has strengthened the security and stability of system.
For the structure of the off-premises station of air-conditioner as shown in Figure 2 and Figure 4, the present invention proposes the control method of another kind of air-conditioner, specifically as shown in Figure 6.
Fig. 6 shows the schematic flow diagram of the control method of air-conditioner according to another embodiment of the invention.
As shown in Figure 6, the control method of air-conditioner according to another embodiment of the invention, comprising: step 602, judges whether to receive defrosting instruction; Step 604, in the time that judgement receives described defrosting instruction, control described the first control assembly 5 and described the second control assembly 8 in opening, and control described the 3rd control assembly 9 in closed condition, to control the first air inlet 12 that enters described compressor 1 by the refrigerant of described the second heat exchanger 6 after described gas-liquid separator 7; Step 606, obtains the force value that described pressure sensor detects; Step 608, when the force value detecting at described pressure sensor reaches predetermined value, control described the second control assembly 8 in closed condition, and control described the first control assembly 5 and described the 3rd control assembly 9 in opening, to control the second air inlet 13 that enters described compressor 1 by the refrigerant of described the second heat exchanger 6.
By in the time receiving defrosting instruction, control the first control assembly 5 in opening, on the major trunk roads that make it possible to flow at off-premises station refrigerant, increase a branch road and get back to compressor 1 (directly get back to the second air inlet 13 of compressor 1 or get back to the first air inlet 12 of compressor 1 by gas-liquid separator 7) after by the second heat exchanger 6, shorten refrigerant and got back to the time of compressor 1, thereby shortened the defrost time of air-conditioner; Meanwhile, branch road refrigerant is by getting back in compressor 1 after the second heat exchanger 6, and therefore, the second heat exchanger 6 can evaporate refrigerant, avoids the interior appearance of compressor 1 to return liquid situation, has strengthened the security and stability of system.
Wherein, the first air inlet 12 of compressor 1 can be low-pressure admission mouth, the second air inlet 13 is compressed into gas port in can being, and by the time receiving defrosting instruction, first control the first control assembly 5 and the second control assembly 8 in opening and control the 3rd control assembly 9 in closed condition, make refrigerant first to return to compressor 1 by low-pressure admission mouth, and in the time that pressure sensor detects that the pressure of low-pressure inlet reaches certain value, control the first control assembly 5 and the 3rd control assembly 9 in opening and control the second control assembly 8 in closed condition, so that refrigerant by compress into gas port and return to compressor 1, and then guarantee the stability of compressor 1 internal pressure.
More than be described with reference to the accompanying drawings technical scheme of the present invention, the present invention proposes a kind of outdoor unit structure and corresponding control method of new air-conditioner, can, shortening under the prerequisite of air-conditioner defrost time, avoid compressor to occur back the situation of liquid, guarantee that security of system is reliable.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. an off-premises station for air-conditioner, is characterized in that, comprising:
Compressor;
Cross valve, is connected to the exhaust outlet of described compressor;
First Heat Exchanger, is connected between described cross valve and off-premises station stop valve;
Gas-liquid separator, is connected between the first air inlet of described cross valve and described compressor;
The second heat exchanger, the first end of described the second heat exchanger is connected to described gas-liquid separator by the first pipeline; And
The first control assembly, the first end of described the first control assembly is connected to the optional position between described First Heat Exchanger and described off-premises station stop valve, the second end of described the first control assembly is connected to the second end of described the second heat exchanger, for the coolant quantity of described the second heat exchanger of flowing through is controlled.
2. the off-premises station of air-conditioner according to claim 1, is characterized in that, the first end of described the second heat exchanger is connected to the second air inlet of described compressor by second pipe;
The off-premises station of described air-conditioner also comprises:
The second control assembly, is arranged on described the first pipeline, for the coolant quantity of flowing through described the second heat exchanger and enter described gas-liquid separator is controlled;
The 3rd control assembly, is arranged on described second pipe, for the coolant quantity of flowing through described the second heat exchanger and enter the second air inlet of described compressor is controlled.
3. the off-premises station of air-conditioner according to claim 2, is characterized in that, also comprises:
Pressure sensor, is arranged on the optional position on the pipeline between the first air inlet of described the second control assembly and described compressor.
4. according to the off-premises station of the air-conditioner described in claim 2 or 3, it is characterized in that, described the first control assembly, described the second control assembly and described the 3rd control assembly comprise:
Electric expansion valve or magnetic valve.
5. an off-premises station for air-conditioner, is characterized in that, comprising:
Compressor;
Cross valve, is connected to the exhaust outlet of described compressor;
Gas-liquid separator, is connected between the first air inlet of described cross valve and described compressor;
First Heat Exchanger, the first end of described First Heat Exchanger is connected to described cross valve;
The second heat exchanger, the first end of described the second heat exchanger and the second end are connected to respectively the second end and the off-premises station stop valve of described First Heat Exchanger, the 3rd end of described the second heat exchanger is connected to the optional position between the second end and the described off-premises station stop valve of described the second heat exchanger by the first control assembly, the 4th end of described the second heat exchanger is connected to described gas-liquid separator by the first pipeline, wherein, the second end of the first end of described the second heat exchanger and described the second heat exchanger is first flow in described the second heat exchanger internal communication, the 3rd end of described the second heat exchanger and the 4th end of described the second heat exchanger are the second runner in described the second heat exchanger internal communication, described first flow is not communicated with in described the second heat exchanger inside with described the second runner, and
Described the first control assembly, for controlling the coolant quantity of described the second heat exchanger of flowing through.
6. the off-premises station of air-conditioner according to claim 5, is characterized in that, the 4th end of described the second heat exchanger is connected to the second air inlet of described compressor by second pipe;
The off-premises station of described air-conditioner also comprises:
The second control assembly, is arranged on described the first pipeline, for the coolant quantity of flowing through described the second heat exchanger and enter described gas-liquid separator is controlled;
The 3rd control assembly, is arranged on described second pipe, for the coolant quantity of flowing through described the second heat exchanger and enter the second air inlet of described compressor is controlled.
7. the off-premises station of air-conditioner according to claim 6, is characterized in that, also comprises:
Pressure sensor, is arranged on the optional position on the pipeline between the first air inlet of described the second control assembly and described compressor.
8. according to the off-premises station of the air-conditioner described in any one in claim 5 to 7, it is characterized in that, described the second heat exchanger comprises:
Plate type heat exchanger or double pipe heat exchanger.
9. a control method for air-conditioner, is characterized in that, controls for the off-premises station of the air-conditioner to as described in claim 1 or 5, and the control method of described air-conditioner comprises:
Judge whether to receive defrosting instruction;
In the time that judgement receives described defrosting instruction, control described the first control assembly in opening, directly enter the first air inlet of described compressor after by described the second heat exchanger to control part refrigerant after described First Heat Exchanger.
10. a control method for air-conditioner, is characterized in that, controls for the off-premises station of the air-conditioner to as described in claim 3 or 7, and the control method of described air-conditioner comprises:
Judge whether to receive defrosting instruction;
In the time that judgement receives described defrosting instruction, control described the first control assembly and described the second control assembly in opening, and control described the 3rd control assembly in closed condition, to control the first air inlet that enters described compressor by the refrigerant of described the second heat exchanger after described gas-liquid separator;
Obtain the force value that described pressure sensor detects;
When the force value detecting at described pressure sensor reaches predetermined value, control described the second control assembly in closed condition, and control described the first control assembly and described the 3rd control assembly in opening, to control the second air inlet that enters described compressor by the refrigerant of described the second heat exchanger.
Priority Applications (1)
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| JP2005233551A (en) * | 2004-02-20 | 2005-09-02 | Mitsubishi Electric Corp | Refrigeration cycle device |
| EP1647783A2 (en) * | 2004-10-18 | 2006-04-19 | Mitsubishi Denki Kabushiki Kaisha | Refrigeration/air conditioning equipment |
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| US4799363A (en) * | 1986-07-17 | 1989-01-24 | Mitsubishi Denki Kabushiki Kaisha | Room air conditioner |
| JPH0237265A (en) * | 1988-07-28 | 1990-02-07 | Matsushita Electric Ind Co Ltd | Heat pump type air conditioner |
| JP2005233551A (en) * | 2004-02-20 | 2005-09-02 | Mitsubishi Electric Corp | Refrigeration cycle device |
| EP1647783A2 (en) * | 2004-10-18 | 2006-04-19 | Mitsubishi Denki Kabushiki Kaisha | Refrigeration/air conditioning equipment |
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