CN215336706U - Air conditioning system and air conditioner with same - Google Patents

Abstract

The utility model discloses an air conditioning system and an air conditioner with the same, wherein the air conditioning system comprises: the air conditioner comprises a compressor, an outdoor heat exchanger, a plurality of throttling pieces, an indoor heat exchanger and an air exhaust heat exchanger, wherein a first outdoor port of the outdoor heat exchanger is communicated with an air outlet of the compressor, the throttling pieces are multiple, a first throttling port of each throttling piece is communicated with a second outdoor port of the outdoor heat exchanger, a first indoor port of each indoor heat exchanger is communicated with a second throttling port of each throttling piece, a second indoor port of each indoor heat exchanger is communicated with a return air port of the compressor, a first air exhaust port of each air exhaust heat exchanger is communicated with the air outlet of the compressor, a second air exhaust port of each air exhaust heat exchanger is communicated with a first indoor port of each indoor heat exchanger, or a first air exhaust port of each air exhaust heat exchanger is communicated with a return air port of the compressor, and a second air exhaust port of each air exhaust heat exchanger is communicated with a first indoor port of each indoor heat exchanger. The air conditioning system can recover indoor cold or heat and has better energy-saving effect.

Description

Air conditioning system and air conditioner with same

Technical Field

The utility model relates to the technical field of air conditioners, in particular to an air conditioning system and an air conditioner with the same.

Background

According to the needs of actual production and life, the places such as hospitals, factories, laboratories and the like need to provide constant-temperature and constant-humidity environmental conditions. In the related art, the corresponding air exhaust device in the air conditioning system can ventilate indoors, but more cold or heat can be dissipated in the air exhaust process, so that more resource waste is caused.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, the utility model provides the air conditioning system which can recover indoor cold or heat and has a good energy-saving effect.

The utility model also provides an air conditioner.

The air conditioning system of the present invention includes: a compressor; the first outdoor port of the outdoor heat exchanger is communicated with the air outlet of the compressor; a plurality of throttling pieces, wherein first throttling ports of the plurality of throttling pieces are communicated with second outdoor ports of the outdoor heat exchanger; a first indoor port of the indoor heat exchanger is communicated with second throttling ports of the plurality of throttling pieces, and a second indoor port of the indoor heat exchanger is communicated with a return air port of the compressor; and the first air exhaust port of the air exhaust heat exchanger is communicated with the air outlet of the compressor, the second air exhaust port of the air exhaust heat exchanger is communicated with the first indoor port of the indoor heat exchanger, or the first air exhaust port of the air exhaust heat exchanger is communicated with the air return port of the compressor, and the second air exhaust port of the air exhaust heat exchanger is communicated with the first indoor port of the indoor heat exchanger.

According to the air conditioning system, when the air conditioning system is in a refrigeration mode and the indoor needs to recover cold, a part of refrigerant in the compressor is condensed under the action of the outdoor heat exchanger, the condensed refrigerant with relatively high temperature is changed into low-temperature low-pressure liquid through the throttling and pressure reducing action of the throttling element, and then the refrigerant enters the indoor heat exchanger to absorb heat and evaporate and then flows back into the compressor; the other part of the refrigerant is condensed under the action of the air exhaust heat exchanger, the condensed refrigerant with relatively high temperature is changed into low-temperature low-pressure liquid through the throttling and pressure reducing action of the throttling element, then the refrigerant enters the indoor heat exchanger to absorb heat and evaporate and then flows back to the compressor, so that the air-conditioning system can open the air exhaust heat exchanger to reduce the exhaust pressure of the air-conditioning system when cold energy needs to be recovered, the condensation effect of the air-conditioning system is enhanced, the output power of a fan and a compressor of the outdoor heat exchanger is reduced, the refrigerating capacity of the air-conditioning system is improved, and the energy-saving effect is good.

Or when the air conditioning system is in a heating mode and heat needs to be recovered indoors, a part of refrigerant in the compressor is condensed under the action of the indoor heat exchanger, the condensed refrigerant with relatively high temperature is changed into low-temperature low-pressure liquid through the throttling and pressure-reducing action of the throttling element, and then the refrigerant enters the outdoor heat exchanger to absorb heat and evaporate and then flows back into the compressor; the other part of the refrigerant is condensed under the action of the indoor heat exchanger, the condensed refrigerant with relatively high temperature is changed into low-temperature low-pressure liquid through the throttling and pressure reducing action of the throttling element, then the refrigerant enters the air exhaust heat exchanger to absorb heat and evaporate and then flows back to the compressor, so that the air-conditioning system can open the air exhaust heat exchanger to improve the evaporation pressure of the air-conditioning system when heat is required to be recovered, the circulation amount of the refrigerant in the air-conditioning system is increased, the output power of a fan and the compressor of the outdoor heat exchanger is reduced, the heating capacity of the air-conditioning system is improved, and the energy-saving effect is good.

In some embodiments, the air conditioning system further comprises a diverter valve having a first port, a second port, and a third port, the first valve port is communicated with an air outlet of the compressor through a first pipeline, the second valve port is communicated with a first outdoor port of the outdoor heat exchanger, the third valve port is communicated with a return air port of the compressor, the second valve port is switchably communicated with one of the first valve port and the third valve port, wherein the first pipeline is communicated with a first exhaust port of the exhaust heat exchanger through a second pipeline, a second indoor port of the indoor heat exchanger is communicated with a return air port of the compressor through a third pipeline, and a second indoor port of the indoor heat exchanger is communicated with the first pipeline through a fourth pipeline, and a first exhaust port of the exhaust heat exchanger is communicated with the air return port of the compressor through a fifth pipeline.

In some embodiments, the air conditioning system further includes a control assembly, where the control assembly includes a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, and a controller, the controller is connected to the first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve, the first solenoid valve is disposed on the third pipeline, the second solenoid valve is disposed on the second pipeline, the third solenoid valve is disposed on the fourth pipeline, and the fourth solenoid valve is disposed on the fifth pipeline.

In some embodiments, the second outdoor port of the outdoor heat exchanger is communicated with the first indoor port of the indoor heat exchanger through a sixth pipeline, the second outdoor port of the outdoor heat exchanger is communicated with the second exhaust port of the exhaust heat exchanger through a seventh pipeline, the throttle member includes a first electronic expansion valve, a second electronic expansion valve and a third electronic expansion valve, the first electronic expansion valve is disposed on the sixth pipeline, the second electronic expansion valve is disposed on the seventh pipeline, and the third electronic expansion valve is disposed on a parallel pipe section of the sixth pipeline and the seventh pipeline.

In some embodiments, the control assembly further comprises a temperature sensor connected to the controller, the temperature sensor being configured to detect a difference between outdoor and indoor temperatures, and the controller being configured to determine whether cold or heat recovery is required indoors by comparing the difference to a preset temperature difference.

In some embodiments, the control assembly further includes a first pressure sensor connected to the air outlet of the compressor for detecting the discharge pressure value of the compressor, and the first pressure sensor is connected to the controller for determining whether or not cold recovery is required indoors by comparing the discharge pressure value of the compressor with a preset discharge pressure value.

In some embodiments, the control assembly further includes a second pressure sensor connected to the return air port of the compressor for detecting an evaporation pressure value in the pipeline of the air conditioning system, and the second pressure sensor is connected to the controller for determining whether heat recovery is required indoors by comparing the evaporation pressure value in the pipeline of the air conditioning system with a preset evaporation pressure value.

In some embodiments, the compressor is an inverter compressor, and the controller is configured to: when the frequency of the compressor is greater than or equal to a preset frequency value H1, determining indoor required cold or heat recovery; and determining that no cooling or heat recovery is required indoors when the frequency of the compressor is less than a preset frequency value H1.

The air conditioner of the present invention includes: an air conditioning system, the air conditioning system being the air conditioning system of any of the above embodiments; indoor set casing, indoor set casing have hold the chamber and with hold air intake and the air exit of chamber intercommunication, refrigerating system's indoor heat exchanger establishes hold the intracavity, the air exit with the heat exchanger cooperation of airing exhaust.

The air conditioner can recover indoor cold or heat, thereby improving the refrigerating or heating capacity of the air conditioner, reducing the output power of the air conditioner and having better energy-saving effect.

In some embodiments, the air conditioner further includes a return air channel, a first end of the return air channel is communicated with the air inlet, a second end of the return air channel is communicated with the accommodating cavity, and the first end of the return air channel and the second end of the return air channel are respectively located on two opposite sides of the indoor heat exchanger.

In some embodiments, the number of the indoor machine housings is multiple, the number of the indoor heat exchangers of the refrigeration system is multiple, the multiple indoor heat exchangers correspond to the multiple air inlets of the indoor machine housings one by one, and the multiple air outlets of the indoor machine housings are communicated with each other.

Drawings

Fig. 1 is a schematic view of an air conditioning system according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of the flow direction of the refrigerant when the air conditioning system of the embodiment of the utility model does not need to recover the cooling capacity in the cooling mode.

Fig. 3 is a schematic diagram of the flow direction of the refrigerant when the air conditioning system needs to recover the cooling capacity in the cooling mode according to the embodiment of the utility model.

Fig. 4 is a schematic diagram of the flow of refrigerant when the air conditioning system of the embodiment of the present invention does not require heat recovery in the heating mode.

Fig. 5 is a schematic diagram of the flow of refrigerant when the air conditioning system of the embodiment of the present invention needs to recover heat in the heating mode.

Fig. 6 is a schematic view of an air conditioning system according to another embodiment of the present invention.

Fig. 7 is a schematic view of an air conditioning system according to still another embodiment of the present invention.

Reference numerals:

1. an outdoor heat exchanger;

2. an indoor heat exchanger;

3. an exhaust heat exchanger;

4. a compressor;

5. a diverter valve;

6. a throttle member; 601. a first electronic expansion valve; 602. a second electronic expansion valve; 603. a third electronic expansion valve;

7. a control component; 701. a first solenoid valve; 702. a second solenoid valve; 703. a third electromagnetic valve; 704. a fourth solenoid valve; 705. a first pressure sensor; 706. a second pressure sensor;

8. a gas-liquid separator;

9. an air return channel;

10. an indoor unit casing; 1001. an air inlet; 1002. an air outlet;

11. a first pipeline; 12. a second pipeline; 13. a third pipeline; 14. a fourth pipeline; 15. a fifth pipeline; 16. a sixth pipeline; 17. a seventh pipeline.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

An air conditioning system and an air conditioner having the same according to an embodiment of the present invention will be described with reference to fig. 1 to 7.

As shown in fig. 1 to 5, the air conditioning system according to the embodiment of the present invention includes a compressor 4, an outdoor heat exchanger 1, a throttle 6, and a discharge air heat exchanger 3. A first outdoor port of the outdoor heat exchanger 1 (e.g., the left end of the outdoor heat exchanger 1 in fig. 1) is communicated with the gas outlet of the compressor 4, a plurality of throttling elements 6 are provided, a first throttling port of the plurality of throttling elements 6 is communicated with a second outdoor port of the outdoor heat exchanger 1 (e.g., the right end of the outdoor heat exchanger 1 in fig. 1), a first indoor port of the indoor heat exchanger 2 (e.g., the lower end of the indoor heat exchanger 2 in fig. 1) is communicated with a second throttling port of the plurality of throttling elements 6, and a second indoor port of the indoor heat exchanger 2 (e.g., the upper end of the indoor heat exchanger 2 in fig. 1) is communicated with the return gas port of the compressor 4.

As shown in fig. 1 to 3, when the air conditioning system is in the cooling mode, the first discharge port of the exhaust air heat exchanger 3 (e.g., the upper end of the exhaust air heat exchanger 3 in fig. 1) communicates with the air outlet of the compressor 4 and the second discharge port of the exhaust air heat exchanger 3 (e.g., the lower end of the exhaust air heat exchanger 3 in fig. 1) communicates with the first indoor port of the indoor heat exchanger 2 (e.g., the lower end of the indoor heat exchanger 2 in fig. 1).

Alternatively, as shown in fig. 4 and 5, when the air conditioning system is in the heating mode, the first discharge port of the discharge air heat exchanger 3 (e.g., the upper end of the discharge air heat exchanger 3 in fig. 4) communicates with the return air port of the compressor 4 and the second discharge port of the discharge air heat exchanger 3 (e.g., the lower end of the discharge air heat exchanger 3 in fig. 4) communicates with the first indoor port of the indoor heat exchanger 2 (e.g., the lower end of the indoor heat exchanger 2 in fig. 4).

According to the air conditioning system provided by the embodiment of the utility model, when the air conditioning system is in a refrigeration mode and the indoor needs to recover cold, a part of refrigerant in the compressor 4 is condensed under the action of the outdoor heat exchanger 1, the condensed refrigerant with relatively high temperature is changed into low-temperature low-pressure liquid through the throttling and pressure reducing action of the throttling element 6, and then the refrigerant enters the indoor heat exchanger 2 to absorb heat and evaporate and then flows back to the compressor 4; the other part of the refrigerant is condensed under the action of the exhaust heat exchanger 3, the condensed refrigerant with relatively high temperature is changed into low-temperature low-pressure liquid through the throttling and pressure reducing action of the throttling element 6, then the refrigerant enters the indoor heat exchanger 2 to absorb heat and evaporate and then flows back to the compressor 4, so that the exhaust heat exchanger 3 can be opened to reduce the exhaust pressure of the air conditioning system when the air conditioning system of the embodiment of the utility model needs to recover cold energy, the condensation effect of the air conditioning system is enhanced, the output power of the fan of the outdoor heat exchanger 3 and the output power of the compressor 4 are reduced, the refrigeration capacity of the air conditioning system is improved, and the energy-saving effect is better.

As shown in fig. 1, when the air conditioning system is in a heating mode and heat needs to be recovered indoors, a part of refrigerant in the compressor 4 is condensed and heated under the action of the indoor heat exchanger 2, the condensed refrigerant with relatively high temperature is changed into low-temperature and low-pressure liquid through the throttling and pressure reducing action of the throttling element 6, and then the refrigerant enters the outdoor heat exchanger 1 to absorb heat and evaporate and then flows back into the compressor 4; the other part of the refrigerant is condensed under the action of the indoor heat exchanger 2, the condensed refrigerant with relatively high temperature is changed into low-temperature low-pressure liquid through the throttling and pressure reducing action of the throttling element 6, then the refrigerant enters the exhaust heat exchanger 3 to absorb heat and evaporate and then flows back to the compressor 4, so that the air-conditioning system of the embodiment of the utility model can open the exhaust heat exchanger 3 to improve the evaporation pressure of the air-conditioning system, increase the circulation amount of the refrigerant in the air-conditioning system, reduce the output power of the fan of the outdoor heat exchanger 3 and the compressor 4, improve the heating capacity of the air-conditioning system and has better energy-saving effect when heat needs to be recovered.

In some embodiments, as shown in fig. 1, the air conditioning system further comprises a direction valve 5, and the direction valve 5 has a first port, a second port, and a third port. For example, as shown in fig. 1, the first valve port is a lower valve port of the direction valve 5, the second valve port is a left valve port of the direction valve 5, and the third valve port is an upper valve port of the direction valve 5, it is understood that the direction valve 5 may be a three-way valve or a four-way valve.

As shown in fig. 1 to 5, the first valve port is communicated with the air outlet of the compressor 4 through a first pipeline 11, the second valve port is communicated with the first outdoor port of the outdoor heat exchanger 1, the second valve port is switchably communicated with one of the first valve port and the third valve port, and the third valve port is communicated with the return air port of the compressor 4, specifically, the air conditioning system further includes a gas-liquid separator 8, and the third valve port is communicated with the return air port of the compressor 4 through the gas-liquid separator 8. The first pipeline 11 is communicated with a first exhaust port of the exhaust heat exchanger 3 through a second pipeline 12, a second indoor port of the indoor heat exchanger 2 is communicated with a return air port of the compressor 4 through a third pipeline 13, a second indoor port of the indoor heat exchanger 2 is communicated with the first pipeline 11 through a fourth pipeline 14, and a first exhaust port of the exhaust heat exchanger 3 is communicated with a return air port of the compressor 4 through a fifth pipeline 15.

It can be understood that, as shown in fig. 2 and fig. 3, the air conditioning system may be switched to the refrigeration mode through the reversing valve 5, when the indoor needs to recover the cold, a part of the refrigerant entering the indoor heat exchanger 2 returns to the compressor 4 through the third pipeline 13, another part of the refrigerant enters the exhaust heat exchanger 3 through the first pipeline 11 and the second pipeline 12, then enters the indoor heat exchanger 2 after being condensed by the exhaust heat exchanger 3, and finally returns to the compressor 4 through the third pipeline 13, thereby recovering the indoor cold.

As shown in fig. 4 and 5, the air conditioning system is switched to the heating mode by the reversing valve 5, when heat needs to be recovered indoors, a part of refrigerant enters the indoor heat exchanger 2 through the fourth pipeline 14 to be condensed, and the condensed refrigerant flows back to the compressor 4 after passing through the throttling element 6 and the outdoor heat exchanger 1. The other part of the refrigerant is condensed under the action of the indoor heat exchanger 2, and the condensed refrigerant flows back into the compressor 4 through a fifth pipeline 15 after passing through the throttling element 6 and the exhaust heat exchanger 3, so that the indoor heat is recovered.

Further, as shown in fig. 1 to 5, the air conditioning system further includes a control assembly 7, the control assembly 7 includes a first solenoid valve 701, a second solenoid valve 702, a third solenoid valve 703, a fourth solenoid valve 704 and a controller (not shown), the controller is connected to the first solenoid valve 701, the second solenoid valve 702, the third solenoid valve 703, the fourth solenoid valve 704 and the direction valve 5, the first solenoid valve 701 is disposed on the third pipeline 13, the second solenoid valve 702 is disposed on the second pipeline 12, the third solenoid valve 703 is disposed on the fourth pipeline 14, and the fourth solenoid valve 704 is disposed on the fifth pipeline 15. It can be understood that the controller can control the opening and closing of the first solenoid valve 701, the second solenoid valve 702, the third solenoid valve 703 and the fourth solenoid valve 704 to conduct different pipelines, thereby implementing the functions of cooling capacity and heat capacity recovery of the air conditioning system.

For example, as shown in fig. 2, when the air conditioner is in the cooling mode and the recovery of cooling capacity is not required, the controller controls the first solenoid valve 701 to open the third line 13, controls the second solenoid valve 702 to block the second line 12, controls the third solenoid valve 703 to block the fourth line 14, and controls the fourth solenoid valve 704 to block the fifth line 15. As shown in fig. 3, when the air conditioner is in the cooling mode and needs to recover cooling capacity, the controller controls the first solenoid valve 701 to conduct the third pipeline 13, controls the second solenoid valve 702 to conduct the second pipeline 12, controls the third solenoid valve 703 to block the fourth pipeline 14, and controls the fourth solenoid valve 704 to block the fifth pipeline 15.

As shown in fig. 4, when the air conditioner is in the heating mode and heat recovery is not required, the controller controls the first solenoid valve 701 to block the third pipeline 13, controls the second solenoid valve 702 to block the second pipeline 12, controls the third solenoid valve 703 to conduct the fourth pipeline 14, and controls the fourth solenoid valve 704 to block the fifth pipeline 15. As shown in fig. 5, when the air conditioner is in the heating mode and heat recovery is required, the controller controls the first solenoid valve 701 to block the third pipeline 13, controls the second solenoid valve 702 to block the second pipeline 12, controls the third solenoid valve 703 to conduct the fourth pipeline 14, and controls the fourth solenoid valve 704 to conduct the fifth pipeline 15.

According to the air conditioning system provided by the embodiment of the utility model, the controller can control the opening and closing of the first electromagnetic valve 701, the second electromagnetic valve 702, the third electromagnetic valve 703 and the fourth electromagnetic valve 704 which are different, so as to conduct different pipelines, and further realize the functions of recovering the cold quantity and the heat quantity of the air conditioning system, so that the automation degree of the air conditioning system is improved, and the energy-saving effect of the air conditioning system is further improved.

In some embodiments, as shown in fig. 2, the second outdoor port of the outdoor heat exchanger 1 (e.g., the right end of the outdoor heat exchanger 1 in fig. 1) communicates with the first indoor port of the indoor heat exchanger 2 (e.g., the lower end of the indoor heat exchanger 2 in fig. 1) through a sixth conduit 16, and the second outdoor port of the outdoor heat exchanger 1 (e.g., the right end of the outdoor heat exchanger 1 in fig. 1) communicates with the second exhaust port of the exhaust air heat exchanger 3 (e.g., the lower end of the exhaust air heat exchanger 3 in fig. 1) through a seventh conduit 17. The plurality of throttle members 6 includes a first electronic expansion valve 601, a second electronic expansion valve 602, and a third electronic expansion valve 603, the first electronic expansion valve 601 is disposed on the sixth pipeline 16, the second electronic expansion valve 602 is disposed on the seventh pipeline 17, and the third electronic expansion valve 603 is disposed on parallel pipe sections of the sixth pipeline 16 and the seventh pipeline 17.

It can be understood that, as shown in fig. 2 and 3, when the air conditioning system is in the cooling mode, a part of the high-temperature and high-pressure refrigerant discharged from the compressor 4 passes through the reversing valve 5, then enters the outdoor heat exchanger 1 to be condensed, passes through the third electronic expansion valve 603 and the first electronic expansion valve 601 to be throttled, enters the indoor heat exchanger 2 to be evaporated so as to cool and dehumidify the indoor air, and finally returns to the compressor 4 through the fourth pipeline 14. When indoor cold energy needs to be recovered, the other part of high-temperature and high-pressure refrigerant enters the exhaust heat exchanger 3 through the second pipeline 12 to be condensed, then enters the indoor heat exchanger 2 to be evaporated after being throttled by the second electronic expansion valve 602 and the first electronic expansion valve 601, and finally flows back to the compressor 4 through the fourth pipeline 14, so that the recovery of indoor cold energy is completed, and the energy-saving effect of the air conditioning system is improved.

In some embodiments, the control unit 7 further comprises a temperature sensor connected to the controller, the temperature sensor being configured to detect a difference between outdoor and indoor temperatures, and the controller being configured to determine whether cold or heat recovery is required indoors by comparing the difference to a preset temperature difference.

Specifically, as shown in fig. 2 and 3, when the air conditioner is in the cooling mode, the outdoor temperature is detected To, the indoor temperature is detected To, and the difference between the outdoor temperature To and the indoor temperature Ti is greater than or equal To the first temperature difference Δ T11, it is determined that the indoor cooling capacity recovery is required, and when the difference between the outdoor temperature To and the indoor temperature Ti is less than the second temperature difference Δ T12, it is determined that the indoor cooling capacity recovery is not required.

As shown in fig. 4 and 5, when the air conditioner is in the heating mode, the outdoor temperature is detected as To, the indoor temperature is detected as Ti, and the difference between the indoor temperature Ti and the outdoor temperature To is greater than or equal To the first temperature difference Δ T11, it is determined that heat recovery is required indoors, and when the difference between the indoor temperature Ti and the outdoor temperature To is less than the second temperature difference Δ T12, it is determined that heat recovery is not required indoors. Therefore, the air conditioner can control the running state of the exhaust heat exchanger 3 according to the comparison of the indoor and outdoor ambient temperatures, can ensure the indoor refrigerating and dehumidifying capacity and the indoor heating capacity, greatly reduces the power output of the air conditioner, and improves the energy-saving effect of the air conditioner.

Preferably, the first temperature difference Δ T11 satisfies: the temperature difference delta T11 is more than 0 and less than or equal to 10 degrees, and the second temperature difference delta T12 satisfies the following conditions: delta T12 is more than or equal to minus 5 degrees and less than or equal to 0 degree. The inventor of the present application finds through experiments that when the first temperature difference Δ T11 and the second temperature difference Δ T12 satisfy the above range, the cooling and heating capabilities of the air conditioner are significantly improved, and the energy saving effect is better.

In other embodiments, as shown in fig. 1 to 5, the control module 7 further includes a first pressure sensor 705, the first pressure sensor 705 is connected to the air outlet of the compressor 4 for detecting the discharge pressure value P0 of the compressor 4, the first pressure sensor 705 is connected to a controller, and the controller is configured to determine whether the indoor cooling capacity recovery is required by comparing the discharge pressure value P0 of the compressor 4 with a preset discharge pressure value P1.

Specifically, as shown in fig. 2 and 3, when the air conditioner is in the cooling mode, the discharge pressure value P0 of the compressor 4 in the air conditioner is detected, and the preset discharge pressure value P1 includes a first preset discharge pressure value P11 and a second preset discharge pressure value P12. And when the exhaust pressure value P0 of the compressor 4 is greater than or equal to the first preset exhaust pressure value P11, determining that indoor cold recovery is required, and when the exhaust pressure value P0 of the compressor 4 is smaller than the second preset exhaust pressure value P12, determining that indoor cold recovery is not required. Therefore, the air conditioner can control the running state of the air exhaust heat exchanger 3 according to the preset running pressure of the air conditioning system, can ensure the indoor refrigerating and dehumidifying capacity, greatly reduces the power output of the air conditioner and improves the energy-saving effect of the air conditioner.

Preferably, the first preset exhaust pressure value P11 satisfies: p11 is more than 2.5MPa and less than or equal to 3.2MPa, and the second preset exhaust pressure value P12 meets the following requirements: p12 is more than or equal to 2.0MPa and less than or equal to 2.5 MPa. The inventor of the present application finds through experiments that when the first preset discharge pressure value P11 and the second preset discharge pressure value P12 satisfy the above ranges, the cooling capacity of the air conditioner is significantly improved, and the energy saving effect is better.

In other embodiments, as shown in fig. 4 and 5, the control assembly 7 further comprises a second pressure sensor 706, the second pressure sensor 706 is connected to the return port of the compressor 4 for detecting an evaporation pressure value P2 in the pipeline of the air conditioning system, and the second pressure sensor 706 is connected to a controller for determining whether heat recovery is required in the room by comparing the evaporation pressure value P2 in the pipeline of the air conditioning system with a preset evaporation pressure value P3.

Specifically, when the air conditioner is in the heating mode, the return air pressure of the compressor 4 of the air conditioner is detected as P4, the pipeline pressure loss in the air conditioner is detected as Δ P, and the difference between the return air pressure P4 of the compressor 4 of the air conditioner and the pipeline pressure loss in the air conditioner as Δ P is the evaporation pressure value P2 in the pipeline of the air conditioning system. The preset vaporisation pressure value P3 comprises a first preset vaporisation pressure value P31 and a second preset vaporisation pressure value P32.

And when the evaporation pressure value P2 is smaller than the first preset evaporation pressure value P31, determining that the indoor heat recovery is required, and when the evaporation pressure value P2 is larger than or equal to the second preset evaporation pressure value P32, determining that the indoor heat recovery is not required. Therefore, the air conditioner can control the running state of the exhaust heat exchanger 3 according to the system preset optimal running pressure interval, can ensure the indoor heating capacity, greatly reduces the power output of the air conditioner, and improves the energy-saving effect of the air conditioner.

Preferably, the first preset evaporation pressure value P31 satisfies: p31 is more than or equal to 0.3MPa and less than 0.7MPa, and the second preset evaporation pressure value P32 meets the following requirements: p32 is more than or equal to 0.7MPa and less than or equal to 1.0 MPa. The inventor of the present application finds, through experiments, that when the first preset evaporation pressure value P31 and the second preset evaporation pressure value P32 satisfy the above ranges, the heating capacity of the air conditioner is significantly improved, and the energy saving effect is better.

In other embodiments, as shown in fig. 1-5, the compressor 4 is an inverter compressor 4, and the controller is configured to determine that refrigeration recovery is required in the room when the air conditioner is in the cooling mode and the frequency of the compressor 4 is greater than or equal to a predetermined frequency value H1, and determine that refrigeration recovery is not required in the room when the frequency of the compressor 4 is less than the predetermined frequency value H1. The controller is configured to determine that heat recovery is required indoors when the frequency of the compressor 4 is equal to or greater than a preset frequency value H1 when the air conditioner is in a heating mode, and determine that heat recovery is not required indoors when the frequency of the compressor 4 is less than a preset frequency value H1. Therefore, the air conditioner can control the running state of the air exhaust heat exchanger 3 according to the running frequency of the compressor 4, can ensure the indoor refrigerating and dehumidifying capacity and the indoor heating capacity, greatly reduces the power output of the air conditioner and improves the energy-saving effect of the air conditioner.

Preferably, the difference between the highest frequency value and the lowest frequency value of the compressor 4 is H0, and the preset frequency value H1 satisfies: 1/3H0 is not more than H1 is not more than 2/3H 0. The inventor of the present application finds, through experiments, that when the preset frequency value satisfies: 1/3H0 is not more than H1 is not more than 2/3H0, the refrigerating and heating capacity of the air conditioner is obviously improved, and the energy-saving effect is better.

As shown in fig. 1 to 5, an air conditioner according to an embodiment of the present invention includes an air conditioning system, which is an air conditioning system of an embodiment of the present invention, and an indoor unit case 10. The indoor unit casing 10 has a containing cavity, and an air inlet 1001 and an air outlet 1002 which are communicated with the containing cavity, the indoor heat exchanger 2 of the refrigeration system is arranged in the containing cavity, and the air outlet 1002 is matched with the air exhaust heat exchanger 3.

In some embodiments, as shown in fig. 6, the air conditioner further includes a return air channel 9, a first end of the return air channel 9 (e.g., a left end of the return air channel 9 in fig. 6) is communicated with the air inlet 1001, a second end of the return air channel 9 (e.g., a right end of the return air channel 9 in fig. 6) is communicated with the accommodating chamber, and the first end of the return air channel 9 and the second end of the return air channel 9 are respectively located at two opposite sides of the indoor heat exchanger 2. Further, as shown in fig. 7, there are a plurality of indoor unit casings 10, a plurality of indoor heat exchangers 2 of the refrigeration system, the plurality of indoor heat exchangers 2 correspond to the air inlets 1001 of the plurality of indoor unit casings 10 one by one, and the air outlets 1002 of the plurality of indoor unit casings 10 are communicated with each other, so that the air conditioner of the embodiment of the present invention can perform centralized processing on the plurality of indoor exhaust air to recover cooling capacity and heat capacity, thereby saving the configuration cost of the equipment and further improving the energy saving effect of the air conditioner.

As shown in fig. 1 to 7, the method for controlling an air conditioner according to an embodiment of the present invention employs an air conditioner according to an embodiment of the present invention, and includes:

when the air conditioner is in a refrigeration mode and the indoor does not need to recover cold, the refrigerant in the compressor 4 flows back into the compressor 4 after passing through the outdoor heat exchanger 1, the throttling element 6 and the indoor heat exchanger 2;

when the air conditioner is in a refrigeration mode and the indoor needs to recover cold, one part of refrigerant in the compressor 4 flows back into the compressor 4 after passing through the outdoor heat exchanger 1, the throttling element 6 and the indoor heat exchanger 2, and the other part of refrigerant flows back into the compressor 4 after passing through the exhaust heat exchanger 3, the throttling element 6 and the indoor heat exchanger 2; or

When the air conditioner is in a heating mode and heat does not need to be recovered indoors, refrigerant in the compressor 4 flows back into the compressor 4 after passing through the indoor heat exchanger 2, the throttling element 6 and the outdoor heat exchanger 1;

when the air conditioner is in a heating mode and heat needs to be recovered indoors, one part of refrigerant in the compressor 4 flows back into the compressor 4 after passing through the indoor heat exchanger 2, the throttling element 6 and the outdoor heat exchanger 1, and the other part of refrigerant flows back into the compressor 4 after passing through the indoor heat exchanger 2, the throttling element 6 and the exhaust heat exchanger 3.

Specifically, an air conditioner and a control method of the air conditioner embodying the present invention are described in detail below with reference to fig. 1 to 7.

As shown in fig. 1 to 5, the air conditioner includes an air conditioning system and an indoor unit casing 10, and the indoor unit casing 10 has a receiving chamber, and an intake port 1001 and a discharge port 1002 communicating with the receiving chamber. The air conditioning system comprises an outdoor heat exchanger 1, an indoor heat exchanger 2, an exhaust heat exchanger 3, a compressor 4, a reversing valve 5, a throttling element 6, a control assembly 7, a gas-liquid separator 8, a first pipeline 11, a second pipeline 12, a third pipeline 13, a fourth pipeline 14, a fifth pipeline 15, a sixth pipeline 16 and a seventh pipeline 17. The direction valve 5 has a first port, a second port, and a third port. The control assembly 7 includes a controller, a first solenoid valve 701, a second solenoid valve 702, a third solenoid valve 703, a fourth solenoid valve 704, a first pressure sensor 705, and a second pressure sensor 706. The throttle 6 includes a first electronic expansion valve 601, a second electronic expansion valve 602, and a third electronic expansion valve 603. The outdoor heat exchanger 1 is arranged outside the indoor unit shell 10, the indoor heat exchanger 2 is arranged in the accommodating cavity and is opposite to the air inlet 1001, and the exhaust heat exchanger 3 is arranged in the accommodating cavity and is opposite to the air outlet 1002.

As shown in fig. 1 to 5, the first valve port is communicated with the air outlet of the compressor 4 through a first pipeline 11, the second valve port is communicated with the first outdoor port of the outdoor heat exchanger 1, the second valve port is switchably communicated with one of the first valve port and the third valve port, the third valve port is communicated with the return air port of the compressor 4, and the third valve port is communicated with the return air port of the compressor 4 through the gas-liquid separator 8. The first pipeline 11 is communicated with a first exhaust port of the exhaust heat exchanger 3 through a second pipeline 12, a second indoor port of the indoor heat exchanger 2 is communicated with a return air port of the compressor 4 through a third pipeline 13, a second indoor port of the indoor heat exchanger 2 is communicated with the first pipeline 11 through a fourth pipeline 14, and a first exhaust port of the exhaust heat exchanger 3 is communicated with a return air port of the compressor 4 through a fifth pipeline 15. A second outdoor port of the outdoor heat exchanger 1 is communicated with a first indoor port of the indoor heat exchanger 2 through a sixth pipeline 16, and a second outdoor port of the outdoor heat exchanger 1 is communicated with a second exhaust port of the exhaust heat exchanger 3 through a seventh pipeline 17.

As shown in fig. 1 to 5, the controller is connected to a first solenoid valve 701, a second solenoid valve 702, a third solenoid valve 703, a fourth solenoid valve 704, a selector valve 5, a first electronic expansion valve 601, a second electronic expansion valve 602, and a third electronic expansion valve 603, the first solenoid valve 701 is provided on the third pipeline 13, the second solenoid valve 702 is provided on the second pipeline 12, the third solenoid valve 703 is provided on the fourth pipeline 14, and the fourth solenoid valve 704 is provided on the fifth pipeline 15. The first electronic expansion valve 601 is disposed on the sixth pipeline 16, the second electronic expansion valve 602 is disposed on the seventh pipeline 17, and the third electronic expansion valve 603 is disposed on a parallel-connected segment of the sixth pipeline 16 and the seventh pipeline 17.

Firstly, when the air conditioner is in a cooling mode.

As shown in fig. 2 and 3, the high-temperature and high-pressure refrigerant discharged from the compressor 4 passes through the reversing valve 5, is condensed in the outdoor heat exchanger 1, is throttled by the third electronic expansion valve 603 and the first electronic expansion valve 601, and is evaporated in the indoor heat exchanger 2 to cool and dehumidify the outside air.

In the scheme 1, the outdoor temperature is detected To through the temperature sensor, the indoor temperature is detected To be Ti, when the air conditioner is in a cooling mode, the numerical value of To-Ti is compared with a first temperature difference delta T11 and a second temperature difference delta T12, and the first temperature difference delta T11 meets the following requirements: the temperature difference delta T11 is more than 0 and less than or equal to 10 degrees, and the second temperature difference delta T12 satisfies the following conditions: delta T12 is more than or equal to minus 5 degrees and less than or equal to 0 degree. When the difference between the outdoor temperature To and the indoor temperature Ti is greater than or equal To the first temperature difference Δ T11, it is determined that cold recovery is required indoors, and then the controller controls the first electromagnetic valve 701 To conduct the third pipeline 13, controls the second electromagnetic valve 702 To conduct the second pipeline 12, controls the third electromagnetic valve 703 To block the fourth pipeline 14, controls the fourth electromagnetic valve 704 To block the fifth pipeline 15, opens the second electronic expansion valve 602, and controls the second electronic expansion valve 602 according To the target supercooling degree.

And when the difference value between the outdoor temperature To and the indoor temperature Ti is smaller than the second temperature difference value delta T12, determining that the indoor cold energy recovery is not needed. At this time, it is determined that the air conditioner is in refrigeration low-load operation, and the cold in the exhaust air does not need to be recovered, and then the controller controls the first electromagnetic valve 701 to conduct the third pipeline 13, controls the second electromagnetic valve 702 to cut off the second pipeline 12, controls the third electromagnetic valve 703 to cut off the fourth pipeline 14, controls the fourth electromagnetic valve 704 to cut off the fifth pipeline 15, and closes the second electronic expansion valve 602.

In the scheme 2, the first pressure sensor 705 is connected with the air outlet of the compressor 4 and is used for detecting the exhaust pressure value P0 of the compressor 4, the first pressure sensor 705 is connected with the controller, and the controller compares the exhaust pressure value P0 of the compressor 4 with the preset exhaust pressure value P1 to determine whether the indoor cold recovery is required. The exhaust pressure value P0 of the compressor 4 in the air conditioner is detected, and the preset exhaust pressure value P1 comprises a first preset exhaust pressure value P11 and a second preset exhaust pressure value P12. The first preset exhaust pressure value P11 satisfies: p11 is more than 2.5MPa and less than or equal to 3.2MPa, and the second preset exhaust pressure value P12 meets the following requirements: p12 is more than or equal to 2.0MPa and less than or equal to 2.5 MPa.

When the exhaust pressure value P0 of the compressor 4 is greater than or equal to the first preset exhaust pressure value P11, it is determined that cold recovery is required indoors, and then the controller controls the first solenoid valve 701 to conduct the third pipeline 13, controls the second solenoid valve 702 to conduct the second pipeline 12, controls the third solenoid valve 703 to cut off the fourth pipeline 14, controls the fourth solenoid valve 704 to cut off the fifth pipeline 15, opens the second electronic expansion valve 602, and controls the second electronic expansion valve 602 according to the target supercooling degree. When the discharge pressure value P0 of the compressor 4 is less than the second preset discharge pressure value P12, it is determined that cold recovery is not required indoors, and then the controller controls the first solenoid valve 701 to conduct the third pipeline 13, controls the second solenoid valve 702 to block the second pipeline 12, controls the third solenoid valve 703 to block the fourth pipeline 14, controls the fourth solenoid valve 704 to block the fifth pipeline 15, and closes the second electronic expansion valve 602.

In the scheme 3, the compressor 4 is the inverter compressor 4, the difference value between the highest frequency value and the lowest frequency value of the compressor 4 is H0, and the preset frequency value H1 satisfies: 1/3H0 is not more than H1 is not more than 2/3H 0. When the frequency of the compressor 4 is greater than or equal to the preset frequency value H1, it is determined that cold recovery is required indoors, and then the controller controls the first electromagnetic valve 701 to conduct the third pipeline 13, controls the second electromagnetic valve 702 to conduct the second pipeline 12, controls the third electromagnetic valve 703 to intercept the fourth pipeline 14, controls the fourth electromagnetic valve 704 to intercept the fifth pipeline 15, opens the second electronic expansion valve 602, and controls the second electronic expansion valve 602 according to the target supercooling degree. When the frequency of the compressor 4 is less than the preset frequency value H1, it is determined that no cold recovery is required in the room, and then the controller controls the first solenoid valve 701 to conduct the third pipeline 13, controls the second solenoid valve 702 to block the second pipeline 12, controls the third solenoid valve 703 to block the fourth pipeline 14, controls the fourth solenoid valve 704 to block the fifth pipeline 15, and closes the second electronic expansion valve 602.

And secondly, when the air conditioner is in a heating mode.

As shown in fig. 4 and 5, the high-temperature and high-pressure refrigerant discharged from the compressor 4 passes through the direction switching valve 5, passes through the third electromagnetic valve 703, and is condensed and heated in the indoor heat exchanger 2. The first electronic expansion valve 601 is opened and the first electronic expansion valve 601 is controlled according to the target supercooling degree.

In the scheme 1, the outdoor temperature is detected To be To, the indoor temperature is detected To be Ti, when the air conditioner is in a heating mode, the value of Ti-To is compared with a first temperature difference value delta T11 and a second temperature difference value delta T12, and the first temperature difference value delta T11 meets the following requirements: the temperature difference delta T11 is more than 0 and less than or equal to 10 degrees, and the second temperature difference delta T12 satisfies the following conditions: delta T12 is more than or equal to minus 5 degrees and less than or equal to 0 degree. When the difference between the indoor temperature Ti and the outdoor temperature To is greater than or equal To the first temperature difference Δ T11, it is determined that heat recovery is required indoors, so that the controller controls the first solenoid valve 701 To block the third pipeline 13, controls the second solenoid valve 702 To block the second pipeline 12, controls the third solenoid valve 703 To conduct the fourth pipeline 14, controls the fourth solenoid valve 704 To conduct the fifth pipeline 15, and controls the second electronic expansion valve 602 according To a target superheat degree. When the difference between the indoor temperature Ti and the outdoor temperature To is smaller than the second temperature difference Δ T12, it is determined that heat recovery is not required indoors, so that the controller controls the first solenoid valve 701 To block the third pipeline 13, controls the second solenoid valve 702 To block the second pipeline 12, controls the third solenoid valve 703 To open the fourth pipeline 14, controls the fourth solenoid valve 704 To block the fifth pipeline 15, and closes the second electronic expansion valve 602.

In the scheme 2, the return air pressure of the compressor 4 of the air conditioner is detected to be P4, the pipeline pressure loss in the air conditioner is detected to be delta P, and the difference value between the return air pressure P4 of the compressor 4 of the air conditioner and the pipeline pressure loss in the air conditioner to be delta P is the evaporation pressure value P2 in the pipeline of the air conditioning system. The preset vaporisation pressure value P3 comprises a first preset vaporisation pressure value P31 and a second preset vaporisation pressure value P32. The first preset evaporation pressure value P31 satisfies: p31 is more than or equal to 0.3MPa and less than 0.7MPa, and the second preset evaporation pressure value P32 meets the following requirements: p32 is more than or equal to 0.7MPa and less than or equal to 1.0 MPa.

When the evaporation pressure value P2 is smaller than a first preset evaporation pressure value P31, it is determined that heat recovery is required indoors, so that the controller controls the first electromagnetic valve 701 to cut off the third pipeline 13, controls the second electromagnetic valve 702 to cut off the second pipeline 12, controls the third electromagnetic valve 703 to conduct the fourth pipeline 14, controls the fourth electromagnetic valve 704 to conduct the fifth pipeline 15, and controls the second electronic expansion valve 602 according to a target superheat degree. When the evaporation pressure value P2 is greater than or equal to the second preset evaporation pressure value P32, it is determined that heat recovery is not required in the chamber, and thus the controller controls the first solenoid valve 701 to block the third pipeline 13, controls the second solenoid valve 702 to block the second pipeline 12, controls the third solenoid valve 703 to open the fourth pipeline 14, controls the fourth solenoid valve 704 to block the fifth pipeline 15, and closes the second electronic expansion valve 602.

In the scheme 3, the compressor 4 is the inverter compressor 4, the difference value between the highest frequency value and the lowest frequency value of the compressor 4 is H0, and the preset frequency value H1 satisfies: 1/3H0 is not more than H1 is not more than 2/3H 0. When the frequency of the compressor 4 is greater than or equal to the preset frequency value H1, it is determined that heat recovery is required indoors, and thus the controller controls the first solenoid valve 701 to block the third pipeline 13, controls the second solenoid valve 702 to block the second pipeline 12, controls the third solenoid valve 703 to conduct the fourth pipeline 14, controls the fourth solenoid valve 704 to conduct the fifth pipeline 15, and controls the second electronic expansion valve 602 according to the target superheat degree. When the frequency of the compressor 4 is less than the preset frequency value H1, it is determined that heat recovery is not required in the chamber, and thus the controller controls the first solenoid valve 701 to intercept the third pipeline 13, controls the second solenoid valve 702 to intercept the second pipeline 12, controls the third solenoid valve 703 to open the fourth pipeline 14, controls the fourth solenoid valve 704 to intercept the fifth pipeline 15, and closes the second electronic expansion valve 602.

The air conditioner can control the running state of the air exhaust heat exchanger 3 according to the comparison of the indoor and outdoor ambient temperatures, the preset running pressure of an air conditioning system or the preset running frequency of the compressor 4, can ensure the indoor refrigerating and dehumidifying capacity and the indoor heating capacity, greatly reduces the power output of the air conditioner, and improves the energy-saving effect of the air conditioner.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (11)

1. An air conditioning system, comprising:

a compressor;

the first outdoor port of the outdoor heat exchanger is communicated with the air outlet of the compressor;

a plurality of throttling pieces, wherein first throttling ports of the plurality of throttling pieces are communicated with second outdoor ports of the outdoor heat exchanger;

a first indoor port of the indoor heat exchanger is communicated with second throttling ports of the plurality of throttling pieces, and a second indoor port of the indoor heat exchanger is communicated with a return air port of the compressor; and

and the first air exhaust port of the air exhaust heat exchanger is communicated with the air outlet of the compressor, the second air exhaust port of the air exhaust heat exchanger is communicated with the first indoor port of the indoor heat exchanger, or the first air exhaust port of the air exhaust heat exchanger is communicated with the air return port of the compressor, and the second air exhaust port of the air exhaust heat exchanger is communicated with the first indoor port of the indoor heat exchanger.

2. The air conditioning system of claim 1, further comprising a reversing valve having a first port in communication with an air outlet of the compressor via a first conduit, a second port in communication with a first outdoor port of the outdoor heat exchanger, and a third port in communication with a return air port of the compressor, the second port switchably communicating with one of the first port and the third port,

the first pipeline is communicated with a first exhaust port of the exhaust heat exchanger through a second pipeline, a second indoor port of the indoor heat exchanger is communicated with a return air port of the compressor through a third pipeline, a second indoor port of the indoor heat exchanger is communicated with the first pipeline through a fourth pipeline, and a first exhaust port of the exhaust heat exchanger is communicated with a return air port of the compressor through a fifth pipeline.

3. The air conditioning system of claim 2, further comprising a control assembly, wherein the control assembly comprises a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, and a controller, wherein the controller is connected to the first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve, the first solenoid valve is disposed on the third pipeline, the second solenoid valve is disposed on the second pipeline, the third solenoid valve is disposed on the fourth pipeline, and the fourth solenoid valve is disposed on the fifth pipeline.

4. The air conditioning system according to claim 1, wherein the second outdoor port of the outdoor heat exchanger is communicated with the first indoor port of the indoor heat exchanger through a sixth pipeline, the second outdoor port of the outdoor heat exchanger is communicated with the second exhaust port of the exhaust heat exchanger through a seventh pipeline, the throttle member includes a first electronic expansion valve, a second electronic expansion valve, and a third electronic expansion valve, the first electronic expansion valve is disposed on the sixth pipeline, the second electronic expansion valve is disposed on the seventh pipeline, and the third electronic expansion valve is disposed on a parallel pipe section of the sixth pipeline and the seventh pipeline.

5. The air conditioning system as claimed in claim 3, wherein the control unit further comprises a temperature sensor connected to the controller, the temperature sensor being configured to detect a difference between outdoor and indoor temperatures, and the controller being configured to determine whether or not cooling or heat recovery is required indoors by comparing the difference with a preset temperature difference.

6. The air conditioning system as claimed in claim 3, wherein the control assembly further comprises a first pressure sensor connected to the air outlet of the compressor for detecting a discharge pressure value of the compressor, the first pressure sensor being connected to the controller for determining whether or not cold recovery is required indoors by comparing the discharge pressure value of the compressor with a preset discharge pressure value.

7. The air conditioning system of claim 3, wherein the control assembly further comprises a second pressure sensor coupled to the return air port of the compressor for detecting an evaporation pressure value in the pipeline of the air conditioning system, the second pressure sensor coupled to the controller for determining whether heat recovery is required indoors by comparing the evaporation pressure value in the pipeline of the air conditioning system with a predetermined evaporation pressure value.

8. The air conditioning system of claim 3, wherein the compressor is an inverter compressor, and the controller is configured to:

when the frequency of the compressor is greater than or equal to a preset frequency value H1, determining that indoor cold or heat is required to be recovered; and determining that no cooling or heat recovery is required indoors when the frequency of the compressor is less than a preset frequency value H1.

9. An air conditioner, comprising:

an air conditioning system according to any one of claims 1 to 8;

indoor set casing, indoor set casing have hold the chamber and with hold air intake and the air exit of chamber intercommunication, refrigerating system's indoor heat exchanger establishes hold the intracavity, the air exit with the heat exchanger cooperation of airing exhaust.

10. The air conditioner of claim 9, further comprising a return air channel, wherein a first end of the return air channel is in communication with the air inlet, a second end of the return air channel is in communication with the accommodating cavity, and the first end of the return air channel and the second end of the return air channel are respectively located on opposite sides of the indoor heat exchanger.

11. The air conditioner according to claim 9, wherein the plurality of indoor unit casings are provided, the plurality of indoor heat exchangers of the refrigerating system are provided, the plurality of indoor heat exchangers are in one-to-one correspondence with the plurality of air inlets of the indoor unit casings, and the plurality of air outlets of the indoor unit casings are communicated with each other.

Images