CN113639414A - Air conditioning system and control method thereof - Google Patents
Air conditioning system and control method thereof Download PDFInfo
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- CN113639414A CN113639414A CN202110843909.3A CN202110843909A CN113639414A CN 113639414 A CN113639414 A CN 113639414A CN 202110843909 A CN202110843909 A CN 202110843909A CN 113639414 A CN113639414 A CN 113639414A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
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- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present disclosure provides an air conditioning system and a control method thereof, the air conditioning system including: the first heat accumulator and the first outdoor heat exchanger are connected in series and arranged on a first branch, the first branch comprises a first pipe section and a second pipe section, the first outdoor heat exchanger is arranged on the first pipe section, the first heat accumulator is arranged on the second pipe section, the second branch is arranged on the second pipe section in parallel, a first valve is arranged on the second branch, a second valve is arranged on the second pipe section, and the first heat accumulator can absorb heat from the outside of a refrigerant pipeline so as to defrost the first outdoor heat exchanger; one end of the fifth branch is communicated with the exhaust end of the compressor, the other end of the fifth branch can be communicated between the first outdoor heat exchanger and the first heat accumulator, and the fifth branch can introduce gas from the exhaust end of the compressor to defrost the first outdoor heat exchanger. According to the present disclosure, the heat of the compressor discharge air can be reused when the accumulated heat is insufficient, the heat supply amount of the indoor side in the sectional defrosting process can be increased, and the defrosting power can be reduced.
Description
Technical Field
The disclosure relates to the technical field of air conditioners, in particular to an air conditioning system and a control method thereof.
Background
In the heating operation process of the air conditioner, because the outdoor heat exchanger can frost, the defrosting cycle needs to be carried out irregularly, the air conditioner generally adopts reverse cycle defrosting, namely, the air conditioner operates in a refrigeration mode, and in the defrosting process, hot air is not output from the indoor side, so that the indoor heat supply is discontinuous, and the comfort is reduced.
In order to improve the comfort level of the heating operation of the air conditioner and realize the indoor continuous heat supply, a sectional defrosting method is provided, namely, an outdoor heat exchanger is divided into two parts, when defrosting is needed in the heating process, one part is in normal heating operation, and the other part is in defrosting operation. The heat of the segmented defrosting can be discharged by the compressor, and can also be discharged by external electric heating, the indoor heat supply amount can be reduced by utilizing the heat discharged by the compressor, and the defrosting power consumption can be increased by utilizing the heat of the external electric heating although the indoor heat supply amount cannot be reduced.
Because the air conditioner in the prior art can reduce the total heat supply of the system in a sectional defrosting mode, the indoor heat supply is obviously reduced or the defrosting power consumption is large, and the like, the air conditioner system and the control method thereof are researched and designed.
BRIEF SUMMARY OF THE PRESENT DISCLOSURE
Therefore, the technical problem to be solved by the present disclosure is to overcome the defect that the heat supply amount in the room is significantly reduced or the defrosting power consumption amount is large when the air conditioner performs the sectional defrosting in the prior art, so as to provide an air conditioning system and a control method thereof.
In order to solve the above problems, the present disclosure provides an air conditioning system, comprising:
the first heat accumulator and the first outdoor heat exchanger are connected in series and arranged on the first branch, the first branch comprises a first pipe section and a second pipe section, the first outdoor heat exchanger is arranged on the first pipe section, the first heat accumulator is arranged on the second pipe section, the second branch is arranged on the second pipe section in parallel, a first valve is arranged on the second branch, a second valve is arranged on the second pipe section, and the first heat accumulator can absorb heat from the outside of a refrigerant pipeline so as to defrost the first outdoor heat exchanger; one end of the fifth branch is communicated with the exhaust end of the compressor, the other end of the fifth branch can be communicated between the first outdoor heat exchanger and the first heat accumulator, a fifth valve is arranged on the fifth branch, and gas can be introduced from the exhaust end of the compressor to defrost the first outdoor heat exchanger.
In some embodiments, the heat pump system further comprises a second outdoor heat exchanger, a second heat accumulator, a third branch, a fourth branch and a sixth branch, wherein the second heat accumulator is connected in series with the second outdoor heat exchanger and arranged on the third branch, the third branch is connected in parallel with the first branch, the third branch comprises a third pipe section and a fourth pipe section, the second outdoor heat exchanger is arranged on the third pipe section, the second heat accumulator is arranged on the fourth pipe section, the fourth branch is arranged on the fourth pipe section in parallel, a third valve is arranged on the fourth pipe section, a fourth valve is arranged on the fourth branch, and the second heat accumulator can absorb heat from the outside of the refrigerant pipeline to defrost the second outdoor heat exchanger; one end of the sixth branch is communicated with the exhaust end of the compressor, the other end of the sixth branch can be communicated between the second outdoor heat exchanger and the second heat storage body, a sixth valve is arranged on the sixth branch, and gas can be introduced from the exhaust end of the compressor to defrost the second outdoor heat exchanger through the sixth branch.
In some embodiments, the first heat accumulator is disposed at a position between the first outdoor heat exchanger and the first throttling device, and the second heat accumulator is disposed at a position between the second outdoor heat exchanger and the first throttling device.
In some embodiments, the first heat storage body includes a first heat collecting tube and a first phase change heat storage material, the first phase change heat storage material is disposed inside the first heat collecting tube, the first heat collecting tube can absorb heat by electric heating or solar energy, and the second tube section penetrates into the first heat collecting tube.
In some embodiments, when first thermal-collecting tube can absorb the heat through electric heating, air conditioning system still includes first electric heating part, first electric heating part wears to establish the entering the inside of first thermal-collecting tube, the power of first electric heating part is at least one in commercial power, photovoltaic electricity, wind-powered electricity and the water and electricity.
In some embodiments, the second heat storage body includes a second heat collecting tube and a second phase change heat storage material, the second phase change heat storage material is disposed inside the second heat collecting tube, the second heat collecting tube can absorb heat by electric heating or solar energy, and the fourth tube segment penetrates into the inside of the second heat collecting tube.
In some embodiments, when the second thermal-collecting tube can absorb the heat through electric heating, air conditioning system still includes second electric heating part, the second electric heating part wears to establish the entering the inside of second thermal-collecting tube, the power of second electric heating part is at least one in commercial power, photovoltaic electricity, wind-powered electricity and the water and electricity.
In some embodiments, a second throttling device is further disposed on the fifth branch, and a third throttling device is further disposed on the sixth branch.
In some embodiments, the first valve and the second valve are both solenoid valves; the third valve and the fourth valve are both solenoid valves; the fifth valve and the sixth valve are both solenoid valves.
In some embodiments, the system further comprises a first temperature sensor capable of detecting the temperature of the outdoor pipe, and a second temperature sensor capable of detecting the temperature of the outdoor environment; and/or, also include the four-way valve.
The present disclosure also provides a control method of an air conditioning system as set forth in any of the preceding claims, wherein:
when the first outdoor heat exchanger, the second outdoor heat exchanger, the first valve, the second valve, the third valve, the fourth valve, the fifth valve and the sixth valve are included at the same time, the control method includes:
a detection step of detecting an operation mode of the air conditioning system;
controlling the second valve and the third valve to be closed, the first valve and the fourth valve to be opened, the fifth valve and the sixth valve to be closed and the suction air of the compressor to be communicated with the indoor heat exchanger when the air conditioning system needs to operate in a cooling mode; when the air conditioning system needs to operate in a heating mode, controlling the second valve and the third valve to be closed, controlling the first valve and the fourth valve to be opened, controlling the fifth valve and the sixth valve to be closed, and controlling the exhaust gas of the compressor to be communicated with the indoor heat exchanger;
when the first outdoor heat exchanger needs defrosting: controlling the first valve to close, the second valve to open, the third valve to close, the fourth valve to open, and the fifth valve and the sixth valve to close; or controlling the first valve to close, the second valve to close, the third valve to close, the fourth valve to open, the fifth valve to open, and the sixth valve to close; or controlling the first valve to close, the second valve to open, the third valve to close, the fourth valve to open, the fifth valve to open, and the sixth valve to close;
when the second outdoor heat exchanger needs defrosting, controlling the first valve to be opened, controlling the second valve to be closed, controlling the third valve to be opened, controlling the fourth valve to be closed, and controlling the fifth valve and the sixth valve to be closed; or controlling the first valve to be opened, controlling the second valve to be closed, controlling the third valve to be closed, controlling the fourth valve to be closed, controlling the fifth valve to be closed, and controlling the sixth valve to be opened; or the first valve is controlled to be opened, the second valve is controlled to be closed, the third valve is controlled to be opened, the fourth valve is controlled to be closed, the fifth valve is controlled to be closed, and the sixth valve is controlled to be opened;
and when the air conditioning system needs to operate in a reverse-cycle defrosting mode, controlling the second valve and the third valve to be closed, controlling the first valve and the fourth valve to be opened, controlling the fifth valve and the sixth valve to be closed, and controlling the suction air of the compressor to be communicated with the indoor heat exchanger.
The air conditioning system and the control method thereof have the following beneficial effects:
according to the defrosting method, the first heat accumulator connected with the first outdoor heat exchanger in series is arranged on a refrigerant pipeline of the air-conditioning system, the first heat accumulator can absorb heat from the outside of the refrigerant pipeline, the heat outside the air-conditioning system can be effectively utilized and stored in the first heat accumulator so as to defrost the first outdoor heat exchanger when the first outdoor heat exchanger needs defrosting, the fifth branch is arranged so that the compressor exhaust can be communicated to the first outdoor heat exchanger so as to compensate defrosting of the first outdoor heat exchanger by the first heat accumulator, and the defrosting effect of the first outdoor heat exchanger is improved by the compressor exhaust; the second branch is connected with a second pipe section where the first heat accumulator is located in parallel, and the second branch and the second pipe section are respectively provided with a first valve and a second valve, so that whether the first heat accumulator is connected or not can be controlled, the problem that the indoor side heat supply quantity is reduced in the segmented defrosting process of the air conditioning system is effectively solved, whether the branch is connected or not can be controlled through a fifth valve arranged on a fifth branch, defrosting of the first outdoor heat exchanger can be compensated when the heat storage quantity of the first heat accumulator is insufficient, the heat in the heat accumulator is preferentially utilized in the segmented defrosting process, and the heat exhausted by the compressor is reused when the accumulated heat is insufficient, so that the indoor side heat supply quantity in the segmented defrosting process can be improved, and the defrosting power can be reduced;
the second heat accumulator connected with the second outdoor heat exchanger in series is arranged on a refrigerant pipeline of the air-conditioning system, the second heat accumulator can absorb heat from the outside of the refrigerant pipeline, the heat outside the air-conditioning system can be effectively stored in the second heat accumulator so as to defrost the second outdoor heat exchanger when the second outdoor heat exchanger needs defrosting, the sixth branch is arranged to communicate the compressor exhaust to the second outdoor heat exchanger so as to compensate the defrosting of the second outdoor heat exchanger by the second heat accumulator, and the defrosting effect of the second outdoor heat exchanger is improved by the compressor exhaust; the fourth branch is connected with the fourth pipe section where the second heat accumulator is located in parallel, and the fourth branch and the fourth pipe section are respectively provided with a fourth valve and a third valve, so that whether the second heat accumulator is connected or not can be controlled, the problem that the indoor side heat supply quantity is reduced in the sectional defrosting process of the air-conditioning system is effectively solved, the heat outside the air-conditioning system is effectively utilized, and the heat discharged by a compressor is not used any more, thereby effectively increasing the heat supply to the indoor side in the segmented defrosting process, improving the indoor comfort, the sixth valve arranged on the sixth branch can control the connection of the branch, can compensate the defrosting of the second outdoor heat exchanger when the heat storage capacity of the second heat storage body is insufficient, preferentially utilizes the heat in the heat storage body when defrosting in sections, when the accumulated heat is not enough, the heat discharged by the compressor is reused, so that the heat supply quantity of the indoor side in the segmented defrosting process can be increased, and the defrosting power can be reduced.
Drawings
FIG. 1 is a system diagram of a thermal storage section defrost of an air conditioning system of the present disclosure;
fig. 2 is a structural view of the first heat storage body in fig. 1.
The reference numerals are represented as:
1. a compressor; 2. a four-way valve; 3. an indoor heat exchanger; 4. a first throttling device; 5. a first temperature sensor; 611. a first valve; 612. a second valve; 621. a third valve; 622. a fourth valve; 111. a fifth valve; 112. a sixth valve; 113. a second throttling device; 114. a third throttling means; 71. a first outdoor heat exchanger; 72. a second outdoor heat exchanger; 8. a second temperature sensor; 91. a first heat storage body; 92. A second heat storage body; 101. a first branch; 201. a first tube section; 202. a second tube section; 102. a second branch circuit; 103. a third branch; 203. a third tube section; 204. a fourth tube section; 104. a fourth branch; 105. A fifth branch; 106. a sixth branch; 107. refrigerant lines (i.e., heat exchange coil pipes); 301. a first heat collecting tube; 302. a first phase change heat storage material; 303. a first electric heating member; 304. a power source.
Detailed Description
As shown in fig. 1-2, the present disclosure provides an air conditioning system comprising:
the first heat accumulator 91 is connected with the first outdoor heat exchanger 71 in series and arranged on the first branch 101, the first branch 101 comprises a first pipe section 201 and a second pipe section 202, the first outdoor heat exchanger 71 is arranged on the first pipe section 201, the first heat accumulator 91 is arranged on the second pipe section 202, the second branch 102 is arranged on the second pipe section 202 in parallel, the second branch 102 is provided with a first valve 611, the second pipe section 202 is provided with a second valve 612, and the first heat accumulator 91 can absorb heat from the outside of a refrigerant pipeline 107 to defrost the first outdoor heat exchanger 71; one end of the fifth branch 105 is communicated with the exhaust end of the compressor 1, and the other end of the fifth branch 105 can be communicated between the first outdoor heat exchanger 71 and the first heat accumulator 91, and a fifth valve 111 is arranged on the fifth branch 105, and the fifth branch 105 can introduce gas from the exhaust end of the compressor 1 to defrost the first outdoor heat exchanger 71.
According to the defrosting method, the first heat accumulator connected with the first outdoor heat exchanger in series is arranged on a refrigerant pipeline of the air-conditioning system, the first heat accumulator can absorb heat from the outside of the refrigerant pipeline, the heat outside the air-conditioning system can be effectively utilized and stored in the first heat accumulator so as to defrost the first outdoor heat exchanger when the first outdoor heat exchanger needs defrosting, the fifth branch is arranged so that the compressor exhaust can be communicated to the first outdoor heat exchanger so as to compensate defrosting of the first outdoor heat exchanger by the first heat accumulator, and the defrosting effect of the first outdoor heat exchanger is improved by the compressor exhaust; the second branch is connected with the second pipe section where the first heat accumulator is located in parallel, and the second branch and the second pipe section are respectively provided with the first valve and the second valve, whether the first heat accumulator is connected or not can be controlled, the problem that the indoor side heat supply quantity is reduced in the segmented defrosting process of the air conditioning system is effectively solved, whether the branch is connected or not can be controlled through the fifth valve arranged on the fifth branch, defrosting of the first outdoor heat exchanger can be compensated when the heat storage quantity of the first heat accumulator is insufficient, the heat in the heat accumulator is preferentially utilized in the segmented defrosting process, the heat exhausted by the compressor is reused when the accumulated heat is insufficient, the indoor side heat supply quantity in the segmented defrosting process can be improved, and defrosting power is reduced.
In some embodiments, the heat exchanger further includes a second outdoor heat exchanger 72, a second heat accumulator 92, a third branch 103, and a fourth branch 104, the second heat accumulator 92 is connected in series with the second outdoor heat exchanger 72 and disposed on the third branch 103, the third branch 103 is connected in parallel with the first branch 101, the third branch 103 includes a third pipe segment 203 and a fourth pipe segment 204, the second outdoor heat exchanger 72 is disposed on the third pipe segment 203, the second heat accumulator 92 is disposed on the fourth pipe segment 204, the fourth branch 104 is connected in parallel with the fourth pipe segment 204, the fourth pipe segment 204 is disposed with a third valve 621, the fourth branch 104 is disposed with a fourth valve 622, and the second heat accumulator 92 can absorb heat from outside of the refrigerant pipeline to defrost the second outdoor heat exchanger 72.
The second heat accumulator connected with the second outdoor heat exchanger in series is arranged on a refrigerant pipeline of the air-conditioning system, the second heat accumulator can absorb heat from the outside of the refrigerant pipeline, the heat outside the air-conditioning system can be effectively stored in the second heat accumulator so as to defrost the second outdoor heat exchanger when the second outdoor heat exchanger needs defrosting, the sixth branch is arranged to communicate the compressor exhaust to the second outdoor heat exchanger so as to compensate the defrosting of the second outdoor heat exchanger by the second heat accumulator, and the defrosting effect of the second outdoor heat exchanger is improved by the compressor exhaust; the fourth branch is connected with the fourth pipe section where the second heat accumulator is located in parallel, and the fourth branch and the fourth pipe section are respectively provided with a fourth valve and a third valve, so that whether the second heat accumulator is connected or not can be controlled, the problem that the indoor side heat supply quantity is reduced in the sectional defrosting process of the air-conditioning system is effectively solved, the heat outside the air-conditioning system is effectively utilized, and the heat discharged by a compressor is not used any more, thereby effectively increasing the heat supply to the indoor side in the segmented defrosting process, improving the indoor comfort, the sixth valve arranged on the sixth branch can control the connection of the branch, can compensate the defrosting of the second outdoor heat exchanger when the heat storage capacity of the second heat storage body is insufficient, preferentially utilizes the heat in the heat storage body when defrosting in sections, when the accumulated heat is not enough, the heat discharged by the compressor is reused, so that the heat supply quantity of the indoor side in the segmented defrosting process can be increased, and the defrosting power can be reduced.
In some embodiments, the first heat accumulator 91 is disposed at a position between the first outdoor heat exchanger 71 and the first throttling device 4, and the second heat accumulator 92 is disposed at a position between the second outdoor heat exchanger 72 and the first throttling device 4. According to the heat storage device, the first heat accumulator is arranged between the first outdoor heat exchanger and the first throttling device, so that when the indoor space is heated, a refrigerant flows through the first throttling device for throttling and depressurizing firstly, and then reaches the first heat accumulator to be heated, and the heat can be used for heating the first outdoor heat exchanger to defrost the first outdoor heat exchanger; the second heat accumulator is arranged between the second outdoor heat exchanger and the first throttling device, so that when the indoor space is heated, the refrigerant flows through the first throttling device for throttling and reducing the pressure, and then reaches the second heat accumulator to be heated, and the heat can be used for heating the second outdoor heat exchanger to defrost the second outdoor heat exchanger.
In some embodiments, the first heat storage body 91 includes a first heat collecting tube 301 and a first phase change heat storage material 302, the first phase change heat storage material 302 is disposed inside the first heat collecting tube 301, the first heat collecting tube 301 can absorb heat by electric heating or solar energy, and the second tube segment 202 penetrates into the inside of the first heat collecting tube 301. The first heat accumulator is preferably in a structural form, namely, the first phase-change heat storage material can absorb heat in an electric heating or solar energy mode, the first heat collecting tube is used for collecting heat and transferring the heat to a refrigerant in the second tube section through connection between the second tube section and the first heat collecting tube, the heat of the refrigerant is improved, defrosting of the first outdoor heat exchanger is further performed, the first phase-change heat storage material can absorb heat to generate phase change so as to store more heat, and the heat storage capacity is improved.
In some embodiments, when first thermal-collecting tube 301 can absorb heat through electrical heating, air conditioning system still includes first electric heating component 303, first electric heating component 303 wears to establish the entering the inside of first thermal-collecting tube 301, the power 304 of first electric heating component 303 is at least one of commercial power, photovoltaic electricity, wind-powered electricity and water and electricity. This is this is the further preferred structural style of this disclosed first thermal-collecting tube, wears to establish through first heater block and gets into that first thermal-collecting tube is inside in order to heat first phase change material, and the power of first electric heater block derives from one in commercial power, photovoltaic electricity, wind-powered electricity and the water and electricity, can provide different multiple modes for the heat collection of the electrical heating of first thermal-collecting tube, avoids using the carminative heat of compressor to come the defrosting, effectively guarantees indoor heating capacity.
In some embodiments, the second heat storage body 92 includes a second heat collecting tube (not shown) and a second phase change heat storage material (not shown), the second phase change heat storage material (not shown) is disposed inside the second heat collecting tube (not shown), the second heat collecting tube (not shown) can absorb heat through electric heating or solar energy, and the fourth tube segment 204 is inserted into the inside of the second heat collecting tube (not shown). The second phase change heat storage material can absorb heat in an electric heating or solar energy mode, the second heat collection pipe is used for collecting heat, the heat is transferred to a refrigerant in the fourth pipe section through connection between the fourth pipe section and the second heat collection pipe, the heat of the refrigerant is improved, defrosting of the second outdoor heat exchanger is further performed, and the second phase change heat storage material can absorb heat to perform phase change so as to store more heat, and the heat storage capacity is improved.
In some embodiments, when the second heat collecting tube (not shown) can absorb heat through electric heating, the air conditioning system further includes a second electric heating part (not shown), the second electric heating part (not shown) penetrates into the inside of the second heat collecting tube (not shown), and a power supply of the second electric heating part is at least one of commercial power, photovoltaic power, wind power and water power. This is this is the further preferred structural style of this disclosed second thermal-collecting tube, wears to establish through the second heater block and gets into that the second thermal-collecting tube is inside in order to heat second phase change heat storage material, and the power of second electric heater block derives from one in commercial power, photovoltaic electricity, wind-powered electricity and the water and electricity, can provide different multiple modes for the heat collection of the electrical heating of second thermal-collecting tube, avoids using the carminative heat of compressor to come the defrosting, effectively guarantees indoor heating capacity.
In some embodiments, a second throttling device 113 is further disposed on the fifth branch 105, and a third throttling device 114 is further disposed on the sixth branch 106. According to the outdoor defrosting device, the second throttling device arranged on the fifth branch can perform throttling and pressure reducing functions on gas introduced from the exhaust end of the compressor, so that the pressure of the gas can be equivalent to that of a refrigerant from the first throttling device 4 as much as possible, conditions are provided for entering the first outdoor heat exchanger 71 to compensate defrosting, and the refrigerant is prevented from flowing back to the second pipe section or flowing back to the second branch from the fifth branch; according to the second throttling device, the third throttling device arranged on the sixth branch can be used for throttling and reducing pressure of gas introduced from the exhaust end of the compressor, so that the pressure of the gas can be equivalent to that of a refrigerant from the first throttling device 4 as much as possible, a condition is provided for entering the second outdoor heat exchanger 72 for defrosting compensation, and the refrigerant is prevented from flowing back to the fourth pipe section or flowing back to the fourth branch from the sixth branch.
In some embodiments, the first valve 611 and the second valve 612 are both solenoid valves; the third valve 621 and the fourth valve 622 are both solenoid valves; the fifth valve 111 and the sixth valve 112 are both solenoid valves. This is a preferred form of construction for the first, second, third, fourth, fifth and sixth valves of the present disclosure, enabling precise control of the respective circuits.
In some embodiments, a first temperature sensor 5 capable of detecting the temperature of the outdoor pipe, and a second temperature sensor 8 capable of detecting the temperature of the outdoor environment; and/or, also includes four-way valve 2. The temperature control device has the advantages that the temperature of the outdoor pipe can be detected through the first temperature sensor, and the outdoor environment temperature can be detected through the second temperature sensor so as to provide conditions for control; the four-way valve 2 comprises four ends D \ E \ S \ C.
The present disclosure also provides a control method of an air conditioning system as set forth in any of the preceding claims, wherein:
when the first outdoor heat exchanger 71, the second outdoor heat exchanger 72, the first valve 611, the second valve 612, the third valve 621, the fourth valve 622, the fifth valve 111, and the sixth valve 112 are included at the same time, the control method includes:
a detection step of detecting an operation mode of the air conditioning system;
a control step of controlling both the second valve 612 and the third valve 621 to be closed, controlling both the first valve 611 and the fourth valve 622 to be opened, controlling both the fifth valve 111 and the sixth valve 112 to be closed, and controlling suction air of the compressor 1 to communicate with the indoor heat exchanger 3 when the air conditioning system needs to operate in a cooling mode; when the air conditioning system needs to operate in a heating mode, controlling the second valve 612 and the third valve 621 to be closed, controlling the first valve 611 and the fourth valve 622 to be opened, controlling the fifth valve 111 and the sixth valve 112 to be closed, and controlling the exhaust gas of the compressor 1 to be communicated with the indoor heat exchanger 3;
when the first outdoor heat exchanger 71 needs defrosting, controlling the first valve 611 to be closed, controlling the second valve 612 to be opened, controlling the third valve 621 to be closed, and controlling the fourth valve 622 to be opened; or the first valve 611 is controlled to be closed, the second valve 612 is controlled to be closed, the third valve 621 is controlled to be closed, the fourth valve 622 is controlled to be opened, the fifth valve 111 is controlled to be opened, and the sixth valve 112 is controlled to be closed; or the first valve 611 is controlled to be closed, the second valve 612 is controlled to be opened, the third valve 621 is controlled to be closed, the fourth valve 622 is controlled to be opened, the fifth valve 111 is controlled to be opened, and the sixth valve 112 is controlled to be closed;
when the second outdoor heat exchanger 72 needs defrosting: controlling the first valve 611 to open, the second valve 612 to close, the third valve 621 to open, the fourth valve 622 to close, and the fifth valve 111 and the sixth valve 112 to close; or the first valve 611 is controlled to be opened, the second valve 612 is controlled to be closed, the third valve 621 is controlled to be closed, the fourth valve 622 is controlled to be closed, the fifth valve 111 is controlled to be closed, and the sixth valve 112 is controlled to be opened; or the first valve is controlled to be opened, the second valve is controlled to be closed, the third valve is controlled to be opened, the fourth valve is controlled to be closed, the fifth valve is controlled to be closed, and the sixth valve is controlled to be opened;
when the air conditioning system needs to operate in the reverse cycle defrost mode, the second valve 612 and the third valve 621 are controlled to be closed, the first valve 611 and the fourth valve 622 are controlled to be opened, the fifth valve 111 and the sixth valve 112 are controlled to be closed, and the suction air of the compressor 1 is controlled to communicate with the indoor heat exchanger 3.
The air conditioning system can judge and carry out different control modes according to different situations according to different control forms in different modes, and achieves refrigeration, heating, heat storage sectional defrosting, heat storage defrosting and exhaust compensation defrosting, exhaust compensation defrosting and reverse circulation defrosting. In the cooling and heating mode, the second valve and the third valve are controlled to be closed, only the first valve and the fourth valve are opened, and the fifth valve and the sixth valve are closed, so that the refrigerant cannot flow through the first heat accumulator and the second heat accumulator, and the two heat accumulators do not work;
when the first outdoor heat exchanger needs defrosting, sectional defrosting is adopted, the second outdoor heat exchanger evaporates and absorbs heat to provide heat for the indoor heat exchanger, the second valve is opened to ensure that the refrigerant passes through the first heat accumulator, the third valve is closed to ensure that the refrigerant does not pass through the second heat accumulator, therefore, the refrigerant reaches the first outdoor heat exchanger after being heated by the first heat accumulator to be heated and defrosted, the refrigerant simultaneously passes through the fourth valve and enters the second outdoor heat exchanger, and the second outdoor heat exchanger normally evaporates and absorbs heat, so that the sectional defrosting effect is realized, external energy absorbed by the first heat accumulator is utilized for defrosting, the energy of the air conditioning system cannot be weakened, and the heat at the indoor side is improved; at the moment, the fifth valve and the sixth valve are closed, and the exhaust gas of the compressor does not pass through the fifth branch or the sixth branch to perform compensation defrosting;
when the first outdoor heat exchanger needs defrosting, heat storage sectional defrosting and exhaust compensation defrosting can be adopted, the second outdoor heat exchanger evaporates and absorbs heat to provide heat for the indoor heat exchanger, the second valve is opened to ensure that the refrigerant passes through the first heat accumulator, the third valve is closed to ensure that the refrigerant does not pass through the second heat accumulator, therefore, the refrigerant reaches the first outdoor heat exchanger after being heated by the first heat accumulator to be heated and defrosted, the refrigerant simultaneously passes through the fourth valve and enters the second outdoor heat exchanger, the second outdoor heat exchanger normally evaporates and absorbs heat, meanwhile, the fifth valve is opened, the refrigerant further reaches the first outdoor heat exchanger from the fifth branch and is overlapped with the heat storage defrosting to defrost the first outdoor heat exchanger, so that the effects of sectional defrosting and exhaust compensation defrosting are realized, and external energy absorbed by the first heat accumulator and exhaust of the compressor are utilized to defrost, the energy of the air conditioning system can not be weakened, and the defrosting power is reduced while the heat of the indoor side is improved.
When the first outdoor heat exchanger needs defrosting, independent exhaust compensation defrosting can be adopted, the second outdoor heat exchanger evaporates and absorbs heat to provide heat for the indoor heat exchanger, the second valve is closed to ensure that the refrigerant does not pass through the first heat accumulator, the third valve is closed to ensure that the refrigerant does not pass through the second heat accumulator, therefore, the refrigerant reaches the first outdoor heat exchanger after passing through the second branch, the refrigerant enters the second outdoor heat exchanger through the fourth valve simultaneously, the second outdoor heat exchanger evaporates and absorbs heat normally, the fifth valve is opened simultaneously, and the refrigerant reaches the first outdoor heat exchanger from the fifth branch to defrost the first outdoor heat exchanger, so that the effect of exhaust compensation defrosting is achieved, defrosting is achieved by utilizing exhaust of the compressor, defrosting is achieved, and defrosting power can be reduced while heat on the indoor side is improved.
When the second outdoor heat exchanger needs defrosting, sectional defrosting is adopted, the first outdoor heat exchanger evaporates and absorbs heat to provide heat for the indoor heat exchanger, the third valve is opened to ensure that the refrigerant passes through the second heat accumulator, and the second valve is closed to ensure that the refrigerant does not pass through the first heat accumulator, so that the refrigerant reaches the second outdoor heat exchanger after being heated by the second heat accumulator to be heated and defrosted, the refrigerant simultaneously passes through the first valve and enters the first outdoor heat exchanger, and the first outdoor heat exchanger normally evaporates and absorbs heat, so that the sectional defrosting effect is realized, external energy absorbed by the second heat accumulator is utilized for defrosting, the energy of the air conditioning system cannot be weakened, and the heat at the indoor side is improved; at the moment, the fifth valve and the sixth valve are closed, and the exhaust gas of the compressor does not pass through the fifth branch or the sixth branch to perform compensation defrosting;
when the second outdoor heat exchanger needs defrosting, heat storage sectional defrosting and exhaust compensation defrosting can be adopted, the first outdoor heat exchanger evaporates and absorbs heat to provide heat for the indoor heat exchanger, the third valve is opened to ensure that the refrigerant passes through the second heat accumulator, the second valve is closed to ensure that the refrigerant does not pass through the first heat accumulator, therefore, the refrigerant reaches the second outdoor heat exchanger after being heated by the second heat accumulator to be heated and defrosted, the refrigerant simultaneously passes through the first valve and enters the first outdoor heat exchanger, the first outdoor heat exchanger normally evaporates and absorbs heat, the sixth valve is opened at the same time, the refrigerant further reaches the second outdoor heat exchanger from the sixth branch and is overlapped with the heat storage defrosting to defrost the second outdoor heat exchanger, so that the effects of sectional defrosting and exhaust compensation defrosting are realized, and external energy absorbed by the second heat accumulator and exhaust of the compressor are utilized to defrost, the energy of the air conditioning system can not be weakened, and the defrosting power is reduced while the heat of the indoor side is improved.
When the second outdoor heat exchanger needs defrosting, independent exhaust compensation defrosting can be adopted, the first outdoor heat exchanger evaporates and absorbs heat to provide heat for the indoor heat exchanger, the third valve is closed to ensure that the refrigerant does not pass through the second heat accumulator, the second valve is closed to ensure that the refrigerant does not pass through the first heat accumulator, therefore, the refrigerant reaches the first outdoor heat exchanger after passing through the first branch, the refrigerant enters the first outdoor heat exchanger through the first valve simultaneously, the first outdoor heat exchanger evaporates and absorbs heat normally, the sixth valve is opened simultaneously, and the refrigerant reaches the second outdoor heat exchanger from the sixth branch to defrost the second outdoor heat exchanger, so that the effect of exhaust compensation defrosting is achieved, defrosting is achieved by utilizing exhaust of the compressor, defrosting is achieved, heat on the indoor side can be improved, and defrosting power is reduced.
Under the condition that the outdoor environment temperature and the outdoor pipe temperature are low, defrosting cannot be effectively performed through sectional defrosting and exhaust compensation defrosting, and at the moment, a reverse circulation defrosting mode needs to be started, namely heat is absorbed from the indoor space, and heat is provided for the two outdoor heat exchangers through reverse circulation of the compressor so as to defrost.
The air conditioning device is composed of a compressor 1, a four-way valve 2, an outdoor heat exchanger, a first heat accumulator 91, a second heat accumulator 92, a first throttling device 4, an indoor heat exchanger 3 and a plurality of electromagnetic valves. The outdoor heat exchanger comprises two parts: and a first outdoor heat exchanger 71 and a second outdoor heat exchanger 72, which are arranged in parallel, wherein a heat accumulator is arranged between each part and the first throttling device.
1. In the cooling operation, the first valve 611 and the fourth valve 622 are kept open, the second valve 612 and the third valve 621, the fifth valve 111, the sixth valve 112, the second throttling device 113 and the third throttling device 114 are kept closed, and the refrigerant flows in the following directions:
2. in the heating operation, the first valve 611 and the fourth valve 622 are kept open, the second valve 612 and the third valve 621, the fifth valve 111, the sixth valve 112, the second throttling device 113 and the third throttling device 114 are kept closed, and the refrigerant flows in the following directions:
3. when the defrosting is carried out in a segmented mode, the two parts of the outdoor heat exchanger are sequentially defrosted.
3.1 when the first outdoor heat exchanger 71 is defrosted and the second outdoor heat exchanger 72 is operated in the heating mode,
a. when defrosting is performed only by the heat of the heat storage body, the fifth valve 111, the sixth valve 112, the second throttle 113, the third throttle 114, the first valve 611, and the third valve 621 are kept closed, the second valve 612 and the fourth valve 622 are kept open, and the refrigerant flow direction is:
b. when defrosting is performed by using the heat storage amount and the compressor discharge amount at the same time, the fifth valve 111, the second throttle 113, the second valve 612, and the fourth valve 622 are kept open, the sixth valve 112, the third throttle 114, the third valve 621, and the first valve 611 are kept closed, and the refrigerant flow direction is:
c. when defrosting is performed only by using the compressor discharge heat, the fifth valve 111, the second throttle 113, and the fourth valve 622 are kept open, the sixth valve 112, the third throttle 114, the third valve 621, the first valve 611, and the second valve 612 are kept closed, and the refrigerant flow direction is:
3.2 the first outdoor heat exchanger 71 is operated in the heating mode, and when the second outdoor heat exchanger 72 is defrosted,
a. when defrosting is performed only by the heat of the heat storage body, the first valve 611 and the third valve 621 are kept open, the fifth valve 111, the sixth valve 112, the second throttle 113, the third throttle 114, the second valve 612, and the fourth valve 622 are kept closed, and the refrigerant flow direction is:
b. when defrosting is performed by using the heat storage amount and the compressor discharge amount at the same time, the fifth valve 111, the second throttle 113, the second valve 612, and the fourth valve 622 are kept closed, the sixth valve 112, the third throttle 114, the third valve 621, and the first valve 611 are kept open, and the refrigerant flow direction is:
c. when defrosting is performed only by using the compressor discharge heat, the sixth valve 112, the third throttle device 114, and the first valve 611 are kept open, the fifth valve 111, the second throttle device 113, the second valve 612, the fourth valve 622, and the third valve 621 are kept closed, and the refrigerant flow direction is:
the above description is only exemplary of the present disclosure and should not be taken as limiting the disclosure, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure. The foregoing is only a preferred embodiment of the present disclosure, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present disclosure, and these modifications and variations should also be regarded as the protection scope of the present disclosure.
Claims (11)
1. An air conditioning system characterized by: the method comprises the following steps:
the heat recovery system comprises a compressor (1), an indoor heat exchanger (3), a first throttling device (4), a first outdoor heat exchanger (71), a first heat accumulator (91), a first branch (101), a second branch (102) and a fifth branch (105), wherein the first heat accumulator (91) is connected with the first outdoor heat exchanger (71) in series and is arranged on the first branch (101), the first branch (101) comprises a first pipe section (201) and a second pipe section (202), the first outdoor heat exchanger (71) is arranged on the first pipe section (201), the first heat accumulator (91) is arranged on the second pipe section (202), the second branch (102) is arranged on the second pipe section (202) in parallel, a first valve (611) is arranged on the second branch (102), a second valve (612) is arranged on the second pipe section (202), and the first heat accumulator (91) can absorb heat from the outside of a refrigerant pipeline to absorb heat of the first outdoor heat exchanger (71) and enter the first outdoor heat accumulator (71) Defrosting; one end of the fifth branch (105) is communicated with the exhaust end of the compressor (1), the other end of the fifth branch can be communicated between the first outdoor heat exchanger (71) and the first heat accumulator (91), a fifth valve (111) is arranged on the fifth branch (105), and the fifth branch (105) can introduce gas from the exhaust end of the compressor (1) to defrost the first outdoor heat exchanger (71).
2. The air conditioning system of claim 1, wherein:
the heat exchanger further comprises a second outdoor heat exchanger (72), a second heat accumulator (92), a third branch (103), a fourth branch (104) and a sixth branch (106), wherein the second heat accumulator (92) is connected with the second outdoor heat exchanger (72) in series and arranged on the third branch (103), the third branch (103) is connected with the first branch (101) in parallel, the third branch (103) comprises a third pipe section (203) and a fourth pipe section (204), the second outdoor heat exchanger (72) is arranged on the third pipe section (203), the second heat accumulator (92) is arranged on the fourth pipe section (204), the fourth branch (104) is arranged on the fourth pipe section (204) in parallel, a third valve (621) is arranged on the fourth pipe section (204), a fourth valve (622) is arranged on the fourth branch (104), and the second heat accumulator (92) can absorb heat from the outside of the refrigerant pipeline to carry out heat absorption on the second outdoor heat exchanger (72) Defrosting; one end of the sixth branch (106) is communicated with the exhaust end of the compressor (1), the other end of the sixth branch can be communicated between the second outdoor heat exchanger (72) and the second heat accumulator (92), a sixth valve (112) is arranged on the sixth branch (106), and gas can be introduced from the exhaust end of the compressor (1) by the sixth branch (106) to defrost the second outdoor heat exchanger (72).
3. The air conditioning system of claim 2, wherein:
the first heat accumulator (91) is disposed at a position between the first outdoor heat exchanger (71) and the first throttling device (4), and the second heat accumulator (92) is disposed at a position between the second outdoor heat exchanger (72) and the first throttling device (4).
4. The air conditioning system according to any one of claims 1 to 3, characterized in that:
first heat accumulator (91) includes first thermal-collecting tube (301) and first phase change thermal storage material (302), first phase change thermal storage material (302) set up in the inside of first thermal-collecting tube (301), first thermal-collecting tube (301) can absorb the heat through electric heating or solar energy's mode, second tube segment (202) wear to establish the entering the inside of first thermal-collecting tube (301).
5. The air conditioning system of claim 4, wherein:
work as when first thermal-collecting tube (301) can absorb the heat through the electrical heating, air conditioning system still includes first electric heating part (303), entering is worn to establish in first electric heating part (303) the inside of first thermal-collecting tube (301), the power of first electric heating part (303) is at least one of commercial power, photovoltaic electricity, wind-powered electricity and water and electricity.
6. The air conditioning system according to any one of claims 2 to 3, characterized in that:
the second heat accumulator (92) comprises a second heat collecting tube and a second phase change heat storage material, the second phase change heat storage material is arranged inside the second heat collecting tube, the second heat collecting tube can absorb heat in an electric heating or solar energy mode, and the fourth tube section (204) penetrates into the second heat collecting tube.
7. The air conditioning system of claim 6, wherein:
work as when the second thermal-collecting tube can absorb the heat through electric heating, air conditioning system still includes second electric heating part, second electric heating part wears to establish the entering the inside of second thermal-collecting tube, the power of second electric heating part is at least one in commercial power, photovoltaic electricity, wind-powered electricity and the water and electricity.
8. The air conditioning system according to any one of claims 2 to 3, characterized in that:
a second throttling device (113) is further arranged on the fifth branch (105), and a third throttling device (114) is further arranged on the sixth branch (106).
9. The air conditioning system according to any one of claims 2 to 3, characterized in that:
the first valve (611) and the second valve (612) are both solenoid valves; the third valve (621) and the fourth valve (622) are both solenoid valves; the fifth valve (111) and the sixth valve (112) are both solenoid valves.
10. The air conditioning system according to any one of claims 1 to 9, characterized in that:
the outdoor temperature sensor also comprises a first temperature sensor (5) capable of detecting the temperature of the outdoor pipe and a second temperature sensor (8) capable of detecting the temperature of the outdoor environment; and/or, also include the four-way valve (2).
11. A control method of an air conditioning system according to any one of claims 1 to 10, characterized in that:
when a first outdoor heat exchanger (71), a second outdoor heat exchanger (72), a first valve (611), a second valve (612), a third valve (621), a fourth valve (622), a fifth valve (111), and a sixth valve (112) are included at the same time, the control method includes:
a detection step of detecting an operation mode of the air conditioning system;
a control step of controlling the second valve (612) and the third valve (621) to be closed, controlling the first valve (611) and the fourth valve (622) to be opened, controlling the fifth valve (111) and the sixth valve (112) to be closed, and controlling the suction air of the compressor (1) to be communicated with the indoor heat exchanger (3) when the air conditioning system needs to operate in a cooling mode; when the air conditioning system needs to operate in a heating mode, controlling the second valve (612) and the third valve (621) to be closed, controlling the first valve (611) and the fourth valve (622) to be opened, controlling the fifth valve (111) and the sixth valve (112) to be closed, and controlling the exhaust gas of the compressor (1) to be communicated with the indoor heat exchanger (3);
when the first outdoor heat exchanger (71) needs defrosting, controlling the first valve (611) to be closed, controlling the second valve (612) to be opened, controlling the third valve (621) to be closed, and controlling the fourth valve (622) to be opened; or controlling the first valve (611) to close, the second valve (612) to close, the third valve (621) to close, the fourth valve (622) to open, the fifth valve (111) to open, and the sixth valve (112) to close; or controlling the first valve (611) to close, the second valve (612) to open, the third valve (621) to close, the fourth valve (622) to open, the fifth valve (111) to open, and the sixth valve (112) to close;
when the second outdoor heat exchanger (72) requires defrosting: -controlling the first valve (611) to open, the second valve (612) to close, the third valve (621) to open, the fourth valve (622) to close, and both the fifth valve (111) and the sixth valve (112) to close; or controlling the first valve (611) to open, the second valve (612) to close, the third valve (621) to close, the fourth valve (622) to close, the fifth valve (111) to close, and the sixth valve (112) to open; or controlling the first valve to be opened, the second valve to be closed, the third valve to be opened, the fourth valve to be closed, the fifth valve to be closed and the sixth valve to be opened;
when the air conditioning system needs to operate in a reverse cycle defrosting mode, the second valve (612) and the third valve (621) are controlled to be closed, the first valve (611) and the fourth valve (622) are controlled to be opened, the fifth valve (111) and the sixth valve (112) are controlled to be closed, and suction air of the compressor (1) is controlled to be communicated with the indoor heat exchanger (3).
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