Gas supplementing and enthalpy increasing system and control method and device thereof, air conditioner

Abstract

The present disclosure relates to the technical field of air conditioners, and discloses a gas supplementing and enthalpy increasing system, a control method and device thereof, and an air conditioner. The outlet of a compressor, the first interface of an indoor unit, the first interface of a condenser, and the inlet of a gas-liquid separator are respectively connected with corresponding valve ports in a four-way valve. The first main port and the first auxiliary port of an economizer are both connected with the second interface of the condenser, the second main port of the economizer is connected with the second interface of the indoor unit, the second auxiliary port of the economizer is connected with the inlet of the gas-liquid separator, and the branch in which the first auxiliary port is located is provided with a first electronic valve. The outlet of the gas-liquid separator is connected with the inlet of the compressor through a first liquid outlet branch and a second liquid outlet branch, and the second liquid outlet branch is provided with a second electronic valve. The first main port is provided with a first temperature sensor, the second main port is provided with a second temperature sensor, and the outlet of the compressor is provided with a high-pressure pressure sensor. The above-mentioned gas supplementing and enthalpy increasing system can improve the stability of air conditioner operation.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of air conditioners, for example, to a gas supplementing and enthalpy increasing system and a control method and device thereof, and an air conditioner. BACKGROUND

[0002] Gas supplementing and enthalpy increasing is a technical means for improving heating efficiency in the field of air conditioners, wherein gas supplementing refers to supplementing gas to a refrigerant system, and enthalpy increasing refers to increasing the energy content of the system. In related technologies, for an air conditioner adopting the gas supplementing and enthalpy increasing technology, in a high-temperature refrigeration mode, the refrigerant cannot be completely condensed into a liquid state, which can cause a refrigerant sound in the indoor unit, and a high exhaust temperature can trigger a compressor protection frequency limit, which can cause a small exhaust volume and poor refrigeration effect; in a low-temperature heating mode, a large compression ratio of the compressor can cause a decrease in heating capacity, which can cause the gas supplementing and enthalpy increasing into the compressor to be in a liquid state, and further can cause a compressor liquid knock phenomenon.

[0003] It can be seen that the air conditioner adopting the gas supplementing and enthalpy increasing technology in related technologies has problems such as a large refrigerant sound, poor refrigeration effect, and compressor liquid knock, which affect the stability of the air conditioner operation.

[0004] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0005] In order to have a basic understanding of some aspects of the disclosed embodiments, the following is a simple summary. The summary is not a general review, nor is it intended to determine key / important components or delineate the scope of protection of these embodiments, but as a prelude to the detailed description below.

[0006] The present disclosure provides a gas supplementing and enthalpy increasing system and a control method and device thereof, and an air conditioner, which can overcome problems such as a large refrigerant sound, poor refrigeration effect, and compressor liquid knock, and improve the stability of the air conditioner operation.

[0007] According to a first aspect of the present disclosure, a gas supplementing and enthalpy increasing system is provided, comprising a compressor, an indoor unit, a condenser, a gas-liquid separator, an economizer, and a four-way valve;

[0008] The outlet of the compressor, the first interface of the indoor unit, the first interface of the condenser, and the inlet of the gas-liquid separator are respectively connected with corresponding valve ports in the four-way valve;

[0009] The first main port and the first auxiliary port of the economizer are connected with the second interface of the condenser, the second main port of the economizer is connected with the second interface of the indoor unit, the second auxiliary port of the economizer is connected with the inlet of the gas-liquid separator, the first main port is in communication with the second main port, the first auxiliary port is in communication with the second auxiliary port, and the branch in which the first auxiliary port is located is provided with a first electronic valve;

[0010] The outlet of the gas-liquid separator is connected with the inlet of the compressor through a first liquid outlet branch and a second liquid outlet branch, and the second liquid outlet branch is provided with a second electronic valve;

[0011] The first main port is provided with a first temperature sensor, the second main port is provided with a second temperature sensor, and the outlet of the compressor is provided with a high-pressure pressure sensor.

[0012] In some embodiments, the path direction from the first main port to the second main port is opposite to the path direction from the first auxiliary port to the second auxiliary port.

[0013] In some embodiments, the second liquid outlet branch is further provided with a one-way valve, and the second electronic valve is in series with the one-way valve.

[0014] In some embodiments, the gas supplement and enthalpy increasing system further comprises a refrigerant radiator, which is arranged in the branch between the second main port of the economizer and the second interface of the indoor unit.

[0015] In some embodiments, the condenser comprises a first condenser and a second condenser, the first condenser is connected in parallel with a first part of the second condenser to form a first condensing unit, and a second part of the second condenser is connected in series with the first condensing unit.

[0016] In some embodiments, a first sub-interface of the first condenser and a first sub-interface of the first part of the second condenser jointly serve as the first interface of the condenser.

[0017] A second sub-interface of the first condenser and a second sub-interface of the first part of the second condenser are connected with a first sub-interface of the second part of the second condenser through a condensing parallel branch.

[0018] A second sub-interface of the second part of the second condenser serves as the second interface of the condenser.

[0019] In some embodiments, the condensing parallel branch is provided with a third electronic valve.

[0020] According to a second aspect of the present disclosure, a control method of a gas supplement and enthalpy increasing system is provided, which is applied to the gas supplement and enthalpy increasing system provided in the first aspect of the present disclosure, and comprises:

[0021] In the high-temperature refrigeration mode, the opening degree of the first electronic valve is adjusted based on the data detected by the high-pressure pressure sensor, the first temperature sensor and the second temperature sensor.

[0022] Or, in the high-temperature refrigeration mode, when it is determined that the exhaust temperature exceeds the preset temperature threshold, the opening degree of the second electronic valve is adjusted.

[0023] Or, in the low-temperature heating mode, when it is determined that the compression ratio of the compressor exceeds the preset compression ratio threshold, the opening degree of the second electronic valve is adjusted.

[0024] According to a third aspect of the present disclosure, a control device of a gas supplementing enthalpy increasing system is provided, comprising a processor and a memory storing program instructions, characterized in that the processor is configured to execute the control method of the gas supplementing enthalpy increasing system provided by the second aspect of the present disclosure when running the program instructions.

[0025] According to a fourth aspect of the present disclosure, an air conditioner is provided, comprising:

[0026] The gas supplementing enthalpy increasing system provided by the first aspect of the present disclosure;

[0027] The control device of the gas supplementing enthalpy increasing system provided by the third aspect of the present disclosure is in communication connection with the gas supplementing enthalpy increasing system.

[0028] The gas supplementing enthalpy increasing system, the control method and device thereof, and the air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects:

[0029] The gas supplementing enthalpy increasing system provided by the embodiments of the present disclosure introduces an economizer, and the economizer is in communication with a condenser and a gas-liquid separator. In the high-temperature refrigeration mode, data detected by a high-pressure pressure sensor, a first temperature sensor and a second temperature sensor can be used to determine whether the refrigerant flowing out of the condenser is not completely condensed into a liquid state. When it is determined that the refrigerant flowing out of the condenser is not completely condensed into a liquid state, the opening degree of a first electronic valve is adjusted to adjust the flow rate of the refrigerant flowing back to the gas-liquid separator from the economizer, which not only reduces the flow rate of the gaseous refrigerant entering the indoor unit in real time, but also liquefies the gaseous refrigerant again, thereby improving the liquefaction degree of the refrigerant flowing out of the condenser and reducing the refrigerant sound generated by the indoor unit.

[0030] In addition, in the high-temperature refrigeration mode or the low-temperature heating mode, when the exhaust temperature exceeds the preset temperature threshold or the compression ratio of the compressor exceeds the preset compression ratio threshold, the opening degree of a second electronic valve is adjusted to adjust the flow rate of the liquid refrigerant entering the compressor, thereby overcoming the problem that the small exhaust volume caused by the high exhaust temperature in the high-temperature refrigeration mode triggers the frequency limiting of the compressor, maintaining stable refrigeration effect, and reducing the proportion of the liquid refrigerant entering the compressor in the low-temperature heating mode, thereby reducing the phenomenon of liquid hammering of the compressor. The above-mentioned gas supplementing enthalpy increasing system can improve the stability of the air conditioner.

[0031] The foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0032] One or more embodiments are illustrated by way of example with reference to the accompanying drawings, which are schematic and are not intended to be limiting of the embodiments, in which like reference numerals denote like elements, and in which:

[0033] Figure 1 is a schematic view of an air conditioner provided by an embodiment of the present disclosure;

[0034] Figure 2 is a schematic view of a gas supplementing and enthalpy increasing system provided by an embodiment of the present disclosure;

[0035] Figure 3 is a partial enlarged schematic view of the gas supplementing and enthalpy increasing system in a high-temperature refrigeration mode provided by an embodiment of the present disclosure;

[0036] Figure 4 is a partial enlarged schematic view of the gas supplementing and enthalpy increasing system in a low-temperature heating mode provided by an embodiment of the present disclosure;

[0037] Figure 5 is a schematic view of a control device in an air conditioner and a gas supplementing and enthalpy increasing system provided by an embodiment of the present disclosure;

[0038] Figure 6 is a schematic view of a control device provided by an embodiment of the present disclosure.

[0039] BRIEF DESCRIPTION OF DRAWINGS

[0040] 100 - gas supplementing and enthalpy increasing system;

[0041] 1 - compressor, 2 - indoor unit;

[0042] 3 - condenser, 31 - first condenser, 32 - second condenser;

[0043] 4 - gas-liquid separator, 41 - first liquid outlet branch, 42 - second liquid outlet branch;

[0044] 5 - economizer, 6 - four-way valve, 7 - first electronic valve, 8 - second electronic valve;

[0045] 9 - first temperature sensor, 10 - second temperature sensor, 11 - high-pressure pressure sensor;

[0046] 12 - one-way valve, 13 - refrigerant radiator, 14 - third electronic valve, 15 - gas pipe stop valve;

[0047] 16 - high-pressure switch, 17 - low-pressure pressure sensor;

[0048] 200 - control device. DETAILED DESCRIPTION

[0049] In order to enable a more detailed understanding of the features and technical content of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure is described in detail below, and the accompanying drawings are used for reference only and do not limit the embodiments of the present disclosure. In the following technical description, in order to facilitate explanation, a plurality of details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be simplified to facilitate the drawings.

[0050] The terms "first", "second", and the like in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0051] Unless otherwise specified, the term "a plurality of" means two or more.

[0052] In the embodiments of the present disclosure, the character " / " represents an "or" relationship between the objects before and after it. For example, A / B represents: A or B.

[0053] The term "and / or" is a description of the association between objects, which means that there can be three relationships. For example, A and / or B means: A or B, or, A and B, the three relationships.

[0054] The term "corresponding" can refer to an association or binding relationship, and A corresponds to B means that there is an association or binding relationship between A and B.

[0055] In combination Figure 1 As shown, the embodiments of the present disclosure provide an air conditioner, which can be a wall-mounted air conditioner, a stand-type air conditioner, and an embedded air conditioner, etc. The air conditioner includes a gas supplement and enthalpy increasing system 100, and a control device 200 of the gas supplement and enthalpy increasing system 100. The control device 200 can control the gas supplement and enthalpy increasing system 100 to operate according to the detection data in the gas supplement and enthalpy increasing system 100.

[0056] In combination Figure 2 As shown, the embodiments of the present disclosure provide a gas supplement and enthalpy increasing system 100, which includes a compressor 1, an indoor unit 2, a condenser 3, a gas-liquid separator 4, an economizer 5, and a four-way valve 6.

[0057] The outlet of the compressor 1, the first interface of the indoor unit 2, the first interface of the condenser 3 and the inlet of the gas-liquid separator 4 are connected with corresponding valve ports in the four-way valve 6 respectively. Specifically, the four-way valve 6 includes valve ports d, s, c and e, the outlet of the compressor 1 is connected with the valve port d, the first interface of the indoor unit 2 is connected with the valve port e, the first interface of the condenser 3 is connected with the valve port c, and the inlet of the gas-liquid separator 4 is connected with the valve port s.

[0058] In combination Figures 2 to 4 As shown in the figure, the first main port a1 and the first auxiliary port b1 of the economizer 5 are both connected with the second interface of the condenser 3, the second main port a2 of the economizer 5 is connected with the second interface of the indoor unit 2, and the second auxiliary port b2 of the economizer 5 is connected with the inlet of the gas-liquid separator 4. The first main port a1 is in communication with the second main port a2, the first auxiliary port b1 is in communication with the second auxiliary port b2, and the branch in which the first auxiliary port b1 is located is provided with the first electronic valve 7. The outlet of the gas-liquid separator 4 is connected with the inlet of the compressor 1 through the first liquid outlet branch 41 and the second liquid outlet branch 42 respectively, and the second liquid outlet branch 42 is provided with the second electronic valve 8. The first main port a1 is provided with the first temperature sensor 9, the second main port a2 is provided with the second temperature sensor 10, and the outlet of the compressor 1 is provided with the high-pressure pressure sensor 11. The high-pressure pressure sensor 11 is used to detect the pressure of the refrigerant flowing out of the outlet of the compressor 1.

[0059] In the high-temperature refrigeration mode, the valve port d of the four-way valve 6 is in communication with the valve port c, and the valve port s is in communication with the valve port e. In this case, the outlet of the compressor 1 is in communication with the first interface of the condenser 3, and the first interface of the indoor unit 2 is in communication with the inlet of the gas-liquid separator 4. The refrigerant in the gas-liquid separator 4 flows into the compressor 1 through the first liquid outlet branch 41 and / or the second liquid outlet branch 42, and the compressor 1 pumps the refrigerant into the four-way valve 6 and into the condenser 3. In combination Figure 3 As shown in the figure, the refrigerant flows into the first main port a1 and the first auxiliary port b1 of the economizer 5 after being condensed by the condenser 3. Part of the refrigerant flowing into the economizer 5 flows into the indoor unit 2 through the second main port a2, and another part of the refrigerant flowing into the economizer 5 flows into the gas-liquid separator 4 through the second auxiliary port b2. The refrigerant flowing into the indoor unit 2 flows into the gas-liquid separator 4 through the four-way valve 6. The first temperature sensor 9 is used to detect the temperature of the refrigerant flowing out of the condenser 3, and the second temperature sensor 10 is used to detect the temperature of the refrigerant flowing out of the second main port a2 of the economizer 5.

[0060] In the low-temperature heating mode, the valve port d of the four-way valve 6 is in communication with the valve port e, and the valve port s is in communication with the valve port c. In this case, the first interface of the outlet chamber indoor unit 2 is in communication with the first interface of the condenser 3, and the first interface of the condenser 3 is in communication with the inlet of the gas-liquid separator 4. The refrigerant in the gas-liquid separator 4 flows into the compressor 1 through the first liquid outlet branch 41 and the second liquid outlet branch 42, and the compressor 1 pumps the refrigerant into the four-way valve 6 and into the indoor unit 2. In combination Figure 4 As shown, the refrigerant is liquefied by the indoor unit 2 and then flows into the second main port a2 of the economizer 5. The refrigerant flowing into the economizer 5 flows into the condenser 3 through the first main port a1, and the refrigerant flowing into the condenser 3 flows into the gas-liquid separator 4 through the four-way valve 6.

[0061] In combination Figures 1 to 5 As shown, the compressor 1, the four-way valve 6, the first electronic valve 7, the second electronic valve 8, the first temperature sensor 9, and the second temperature sensor 10 in the air supplementing and enthalpy increasing system 100 are in communication connection with the control device 200. It can be understood that the control device 200 can receive the temperature data collected by the first temperature sensor 9 and the second temperature sensor 10, the control device 200 can control the start-stop state and power of the compressor 1, the control device 200 can control the communication state between the valve ports of the four-way valve 6, and the control device 200 can control the opening and closing state and the opening degree of the first electronic valve 7 and the second electronic valve 8.

[0062] In the high-temperature refrigeration mode, the control device 200 can adjust the opening degree of the first electronic valve 7 based on the data detected by the high-pressure pressure sensor 11, the first temperature sensor 9, and the second temperature sensor 10. In addition, in the high-temperature refrigeration mode, the control device 200 adjusts the opening degree of the second electronic valve 8 when it is determined that the exhaust gas temperature exceeds the preset temperature threshold. In the low-temperature heating mode, the control device 200 can adjust the opening degree of the second electronic valve 8 when it is determined that the compression ratio of the compressor 1 exceeds the preset compression ratio threshold.

[0063] The embodiment of the present disclosure provides a gas supplementing and enthalpy increasing system 100, an economizer 5 is introduced, and the economizer 5 is in communication with a condenser 3 and a gas-liquid separator 4 respectively. In the high-temperature refrigeration mode, data detected by a high-pressure pressure sensor 11, a first temperature sensor 9 and a second temperature sensor 10 can determine whether the refrigerant flowing out of the condenser 3 is not completely condensed into a liquid state. When it is determined that the refrigerant flowing out of the condenser 3 is not completely condensed into a liquid state, the flow of the refrigerant flowing back to the gas-liquid separator 4 from the economizer 5 is adjusted by adjusting the opening degree of the first electronic valve 7, which not only reduces the flow of the gaseous refrigerant entering the indoor unit 2 in real time, but also liquefies the gaseous refrigerant again, thereby improving the liquefaction degree of the refrigerant flowing out of the condenser 3, and reducing the refrigerant sound generated by the indoor unit 2. In addition, in the high-temperature refrigeration mode or the low-temperature heating mode, when the exhaust gas temperature exceeds the preset temperature threshold or the compression ratio of the compressor 1 exceeds the preset compression ratio threshold, the flow of the liquid refrigerant entering the compressor 1 is adjusted by adjusting the opening degree of the second electronic valve 8, thereby overcoming the problem that the small exhaust gas volume caused by the high exhaust gas temperature in the high-temperature refrigeration mode triggers the frequency limiting of the compressor 1, maintaining stable refrigeration effect, and reducing the proportion of the liquid refrigerant entering the compressor 1 in the low-temperature heating mode, reducing the phenomenon of liquid strike of the compressor 1. It can be seen that the above-mentioned gas supplementing and enthalpy increasing system 100 can overcome the problems of excessive refrigerant sound, poor refrigeration effect and liquid strike of the compressor 1, and improve the stability of air conditioner operation.

[0064] In some embodiments, the direction of the path from the first main port a1 to the second main port a2 is opposite to the direction of the path from the first auxiliary port b1 to the second auxiliary port b2. Specifically, the first main port a1 and the second auxiliary port b2 are located at one end of the economizer 5, and the second main port a2 and the first auxiliary port b1 are located at the other end of the economizer 5. In the high-temperature refrigeration mode, the direction of the refrigerant flowing out of the condenser 3 from the first main port a1 to the second main port a2 is opposite to the direction of the refrigerant flowing out of the condenser 3 from the first auxiliary port b1 to the second auxiliary port b2.

[0065] It can be understood that in the high-temperature refrigeration mode, the two streams of refrigerant in the economizer 5 flow in opposite directions, which can improve the heat exchange efficiency. This counter-flow arrangement can make the temperature gradient in the heat exchange process more uniform, thereby promoting more efficient heat transfer. Moreover, the refrigerant flowing out of the condenser 3 may not be completely liquefied. By letting this part of the refrigerant flow in the economizer 5 in the opposite direction of the already partially cooled refrigerant (also from the condenser 3, but through the other end of the economizer 5), the liquefaction of this part of the refrigerant can be further promoted. This not only helps to improve the refrigeration efficiency, but also can reduce the problem of refrigerant sound caused by the unliquefied refrigerant entering the indoor unit 2.

[0066] In some embodiments, the second liquid outlet branch 42 is further provided with a one-way valve 12, and the second electronic valve 8 is in series with the one-way valve 12. The one-way valve 12 can prevent the refrigerant in the compressor 1 from flowing back to the gas-liquid separator 4 through the second liquid outlet branch 42.

[0067] In some embodiments, the gas supplement and enthalpy increasing system 100 further comprises a refrigerant radiator 13 arranged in a branch between the second main port a2 of the economizer 5 and the second interface of the indoor unit 2. In the high-temperature refrigeration mode, part of the refrigerant flowing out of the condenser 3 is cooled through the heat exchange of the economizer 5, and then enters the refrigerant radiator 13 through the second main port a2. In the refrigerant radiator 13, the refrigerant is further cooled, and then enters the indoor unit 2 through the second interface of the indoor unit 2. The refrigerant radiator 13 further reduces the temperature of the refrigerant by exchanging heat with external air or other cooling media, so as to further liquefy the refrigerant. In the low-temperature heating mode, the refrigerant radiator 13 has relatively less effect, because at this time the refrigerant is mainly liquefied in the indoor unit 2, and then flows back to the condenser 3 through the economizer 5. However, the refrigerant radiator 13 can still play a certain auxiliary role to ensure that the refrigerant is in a suitable state before entering the indoor unit 2.

[0068] In some embodiments, the condenser 3 comprises a first condenser 31 and a second condenser 32, the first condenser 31 and a first part 32a of the second condenser 32 are connected in parallel to form a first condensing unit, and a second part 32b of the second condenser 32 is connected in series with the first condensing unit.

[0069] The parallel connection of the first condenser 31 and the first part 32a of the second condenser 32 can increase the total heat exchange area of the condenser 3. The parallel design allows the refrigerant to be condensed through two paths at the same time, increasing the surface area of condensation and thus improving the condensation efficiency. The second part 32b of the second condenser 32 is connected in series with the first condensing unit, which can further improve the condensation degree of the refrigerant. Through the series design, the refrigerant is preliminarily condensed through the parallel part, and then further condensed through the series part, to ensure that the refrigerant is liquefied as much as possible.

[0070] In some embodiments, the first sub-interface of the first condenser 31 and the first sub-interface of the first part 32a of the second condenser 32 jointly serve as the first interface of the condenser 3. The second sub-interface of the first condenser 31 and the second sub-interface of the first part 32a of the second condenser 32 are connected to the first sub-interface of the second part 32b of the second condenser 32 through a condensing parallel branch. The second sub-interface of the second part 32b of the second condenser 32 serves as the second interface of the condenser 3.

[0071] In some embodiments, the condensing parallel branch is provided with a third electronic valve 14. The third electronic valve 14 can adjust the opening degree of the condensing parallel branch, thereby controlling the refrigerant flow into the first part 32a of the second condenser 32. By adjusting the opening degree of the third electronic valve 14, the flow distribution of the refrigerant in the parallel part can be ensured to be more uniform, and the heat exchange efficiency of the condenser 3 can be improved. In addition, under different environmental temperature and load conditions, the demand of the system can change. By adjusting the third electronic valve 14, the heat exchange area and flow of the condenser 3 can be dynamically adjusted, so that the system can maintain the best operating state under various working conditions.

[0072] In some embodiments, the gas injection and enthalpy increasing system 100 further comprises a gas pipe stop valve 15, and the branch between the first interface of the indoor unit 2 and the four-way valve 6 is provided with the gas pipe stop valve 15, and the branch between the second main port a2 of the economizer 5 and the second interface of the indoor unit 2 is provided with the gas pipe stop valve 15.

[0073] In some embodiments, the outlet of the compressor 1 is provided with a high-pressure switch 16, and the high-pressure switch 16 is in series with the high-pressure pressure sensor 11.

[0074] In some embodiments, the gas injection and enthalpy increasing system 100 further comprises a low-pressure pressure sensor 17, and the low-pressure pressure sensor 17 is arranged at the inlet of the gas-liquid separator 4.

[0075] In combination with the gas injection and enthalpy increasing system 100 provided by the embodiments of the present disclosure, the embodiments of the present disclosure provide a control method of the gas injection and enthalpy increasing system 100 in a high-temperature refrigeration mode, comprising: in the high-temperature refrigeration mode, based on the data detected by the high-pressure pressure sensor 11, the first temperature sensor 9 and the second temperature sensor 10, adjusting the opening degree of the first electronic valve 7.

[0076] In some embodiments, the control device 200 can calculate the current condensation temperature of the refrigerant according to the pressure value detected by the high-pressure pressure sensor 11, obtain the first temperature detected by the first temperature sensor 9 and the second temperature detected by the second temperature sensor 10. When the first temperature is higher than the condensation temperature, the opening degree of the first electronic valve 7 is adjusted so that the second temperature is lower than the condensation temperature.

[0077] Specifically, when the first temperature is higher than the condensation temperature, the opening degree of the first electronic valve 7 is gradually reduced, and the change of the first temperature is detected in real time. If the first temperature continues to rise, the opening degree of the first electronic valve 7 is reset, and then the opening degree of the first electronic valve 7 is gradually increased, and the adjustment of the opening degree of the first electronic valve 7 is stopped when the second temperature is detected to be lower than the condensation temperature. If the first temperature continues to decrease, the adjustment of the opening degree of the first electronic valve 7 is stopped when the second temperature is detected to be lower than the condensation temperature.

[0078] In the embodiments of the present disclosure, when the opening degree of the first electronic valve 7 is gradually reduced, the opening degree of the first electronic valve 7 can be reduced according to a preset opening degree change rate (for example, 2 steps per 10 seconds).

[0079] In the embodiments of the present disclosure, when the opening degree of the first electronic valve 7 is gradually increased, the opening degree of the first electronic valve 7 can be increased according to a preset opening degree change rate (for example, 2 steps per 10 seconds).

[0080] In combination with the gas supplementing and enthalpy increasing system 100 provided in the embodiments of the present disclosure, the embodiments of the present disclosure provide another control method of the gas supplementing and enthalpy increasing system 100 in the high-temperature refrigeration mode, which comprises: in the high-temperature refrigeration mode, adjusting the opening degree of the second electronic valve 8 when it is determined that the exhaust temperature exceeds a preset temperature threshold.

[0081] In some embodiments, a temperature threshold (for example, 95°C) can be preset. In the high-temperature refrigeration mode, it can be determined in real time whether the exhaust temperature exceeds the temperature threshold. When it is determined that the exhaust temperature exceeds the temperature threshold, the opening degree of the second electronic valve 8 is increased to supplement more gaseous refrigerant for the compressor 1, so as to reduce the exhaust temperature, thereby overcoming the problem that the small exhaust volume caused by the frequency limiting of the compressor 1 triggered by the high exhaust temperature in the high-temperature refrigeration mode, and the stable refrigeration effect can be maintained.

[0082] In combination with the gas supplementing and enthalpy increasing system 100 provided in the embodiments of the present disclosure, the embodiments of the present disclosure provide a control method of the gas supplementing and enthalpy increasing system 100 in the low-temperature heating mode, which comprises: in the low-temperature heating mode, adjusting the opening degree of the second electronic valve 8 when it is determined that the compression ratio of the compressor 1 exceeds a preset compression ratio threshold.

[0083] In some embodiments, a compression ratio threshold can be preset. In the low-temperature heating mode, it can be determined in real time whether the compression ratio of the compressor 1 exceeds the compression ratio threshold. When it is determined that the compression ratio of the compressor 1 exceeds the compression ratio threshold, the opening degree of the second electronic valve 8 is increased to supplement more gaseous refrigerant for the compressor 1, so as to effectively reduce the phenomenon of liquid knock of the compressor 1, and also reduce the compression ratio, protect the system safety, and improve the heating efficiency.

[0084] In combination Figure 6As shown, the control device 200 of the air supplementing and enthalpy increasing system provided by the embodiments of the present disclosure includes a processor 201 and a memory 202. Optionally, the control device 200 can further include a communication interface 203 and a bus 204. The processor 201, the communication interface 203 and the memory 202 can complete communication with each other through the bus 204. The communication interface 203 can be used for information transmission. The processor 201 can invoke the logic instructions in the memory 202 to execute the control method of the air supplementing and enthalpy increasing system of the above-mentioned embodiments.

[0085] In addition, the logic instructions in the memory 202 can be implemented in the form of a software function unit and sold or used as an independent product, which can be stored in a computer readable storage medium.

[0086] The memory 202 as a computer readable storage medium can be used to store software programs, computer executable programs, such as program instructions / modules corresponding to the method in the embodiments of the present disclosure. The processor 201 executes the function application and data processing by running the program instructions / modules stored in the memory 202, that is, implements the control method of the air supplementing and enthalpy increasing system in the above-mentioned embodiments.

[0087] The memory 202 can include a program storage area and a data storage area. The program storage area can store an operating system and application programs required by at least one function; the data storage area can store data created according to the use of the terminal device, etc. In addition, the memory 202 can include a high-speed random access memory, and can also include a non-volatile memory.

[0088] The embodiments of the present disclosure provide a computer readable storage medium, which stores computer executable instructions, and the computer executable instructions are set to execute the control method of the air supplementing and enthalpy increasing system.

[0089] The technical solutions of the embodiments of the present disclosure can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes one or more instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in the embodiments of the present disclosure. The aforementioned storage medium can be a non-transitory storage medium, for example: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0090] The foregoing description and accompanying drawings fully illustrate embodiments of this disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terminology used in this application is for describing embodiments only and is not intended to limit the claims. As used in the description of embodiments and claims, the singular forms “a,” “an,” and “the” are intended to equally include the plural forms unless the context clearly indicates otherwise. Similarly, the term “and / or” as used in this application means including one or more of the associated listed items and all possible combinations thereof. Additionally, when used in this application, the term "comprise" and its variations "comprises" and / or "comprising" refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Without further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes said element. In this document, each embodiment may focus on the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, the relevant parts can be referred to the description of the method section.

[0091] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0092] In the embodiments disclosed herein, the disclosed methods, products (including but not limited to apparatuses, devices, etc.), can be implemented in other manners. For example, the apparatus embodiments described above are merely schematic. For example, the division of the units is merely logical function division. There can be other division manners in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, apparatuses, or units, and can be in electrical, mechanical, or other forms. The units described as separated components can or can not be physically separated, and components displayed as units can or can not be physical units. Some or all of the units can be selected according to actual needs to achieve the embodiments.

[0093] The flowcharts and block diagrams in the drawings show the possible implementation architectures, functions, and operations of the systems, methods, and computer program products according to the embodiments of the present disclosure. In this regard, each block in the flowcharts or block diagrams can represent a module, a program segment, or a part of code that contains one or more executable instructions for implementing the specified logical functions. In some alternative implementations, the functions noted in the blocks can occur in different orders than those noted in the drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and they can sometimes be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the drawings, the operations or steps corresponding to different blocks can also occur in different orders than those disclosed in the descriptions, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in reverse order, depending on the functions involved. Each block in the block diagrams and / or flowcharts, and the combination of blocks in the block diagrams and / or flowcharts, can be implemented by a dedicated hardware-based system that performs the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A bleed air augmented enthalpy system characterized by, The compressor, the indoor unit, the condenser, the gas-liquid separator, the economizer and the four-way valve are included. The outlet of the compressor, the first interface of the indoor unit, the first interface of the condenser and the inlet of the gas-liquid separator are connected with corresponding valve ports in the four-way valve respectively. The first main port and the first auxiliary port of the economizer are connected with the second interface of the condenser, the second main port of the economizer is connected with the second interface of the indoor unit, the second auxiliary port of the economizer is connected with the inlet of the gas-liquid separator, the first main port is communicated with the second main port, the first auxiliary port is communicated with the second auxiliary port, and the branch in which the first auxiliary port is located is provided with a first electronic valve. The outlet of the gas-liquid separator is connected with the inlet of the compressor through a first liquid outlet branch and a second liquid outlet branch respectively, and the second liquid outlet branch is provided with a second electronic valve. The first main port is provided with a first temperature sensor, the second main port is provided with a second temperature sensor, and the outlet of the compressor is provided with a high-pressure pressure sensor. In the high-temperature refrigeration mode, the opening degree of the first electronic valve is adjusted based on the data detected by the high-pressure pressure sensor, the first temperature sensor and the second temperature sensor.

2. The bleed air augmentedenthalpy system of claim 1, wherein, The path direction from the first main port to the second main port is opposite to the path direction from the first auxiliary port to the second auxiliary port.

3. The air augmentation supercharging system of claim 1, wherein, The second liquid outlet branch is further provided with a one-way valve, and the second electronic valve is connected with the one-way valve in series.

4. The air augmentation supercharging system of claim 1, wherein, A refrigerant radiator is further included, which is arranged in the branch between the second main port of the economizer and the second interface of the indoor unit.

5. The bleed air augmentedenthalpy system according to any one of claims 1 to 4, wherein, The condenser includes a first condenser and a second condenser, the first condenser and a first part of the second condenser are connected in parallel to form a first condensing unit, and a second part of the second condenser is connected in series with the first condensing unit.

6. The bleed air augmentedenthalpy system of claim 5, wherein, A first sub-interface of the first condenser and a first sub-interface of the first part of the second condenser are collectively used as the first interface of the condenser. A second sub-interface of the first condenser and a second sub-interface of the first part of the second condenser are connected with a first sub-interface of the second part of the second condenser through a condensing parallel branch. A second sub-interface of the second part of the second condenser is used as the second interface of the condenser.

7. The bleed air augmentedenthalpy system of claim 6, wherein, The condensing parallel branch is provided with a third electronic valve.

8. A control method of a bleed air augmented system, applied to the bleed air augmented system according to any one of claims 1 to 7, characterized in that, The compressor, the indoor unit, the condenser, the gas-liquid separator, the economizer and the four-way valve are included. In the high-temperature refrigeration mode, the opening degree of the first electronic valve is adjusted based on the data detected by the high-pressure pressure sensor, the first temperature sensor and the second temperature sensor.

9. A control device for a bleed air augmented system, comprising a processor and a memory having stored program instructions, wherein, The processor is configured to execute the control method of the gas supplementing and enthalpy increasing system when running the program instructions.

10. An air conditioner characterized by comprising: The compressor, the indoor unit, the condenser, the gas-liquid separator, the economizer and the four-way valve are included. The control device of the gas supplementing and enthalpy increasing system according to claim 9, wherein the control device is connected with the gas supplementing and enthalpy increasing system in communication. ​

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