CN111306832B

CN111306832B - Air conditioner

Info

Publication number: CN111306832B
Application number: CN201811507853.9A
Authority: CN
Inventors: 曾令华; 王小龙; 廖四清; 杨宇飞
Original assignee: Guangdong Meizhi Precision Manufacturing Co Ltd
Current assignee: Guangdong Meizhi Precision Manufacturing Co Ltd
Priority date: 2018-12-11
Filing date: 2018-12-11
Publication date: 2021-09-17
Anticipated expiration: 2038-12-11
Also published as: CN111306832A

Abstract

The invention discloses an air conditioner which comprises a compressor, an indoor side heat exchanger, an outdoor side heat exchanger, a throttling device, a four-way valve, a reversing assembly and a connecting pipe, wherein the compression assembly of the compressor is provided with a first air suction port, a first exhaust port, a second air suction port and a second exhaust port, a first air cylinder and a second air cylinder are arranged in series, a connecting channel is arranged between the first exhaust port and the second air suction port, the outer side heat exchanger comprises at least two outdoor heat exchange units which are arranged in parallel, the throttling device is respectively connected with the indoor side heat exchanger and the outdoor side heat exchanger, the reversing assembly comprises at least two switching valves, the reversing assembly is connected between the outdoor side heat exchanger and the third port of the four-way valve, one end of the connecting pipe is connected with the reversing assembly, and the other end of the connecting pipe is connected with the first exhaust port. According to the air conditioner provided by the embodiment of the invention, the influence of the air conditioner on the indoor temperature in the heating and defrosting process is reduced, the defrosting effect and comfort of the air conditioner are improved, and the defrosting energy consumption of the air conditioner is reduced.

Description

Air conditioner

Technical Field

The invention relates to the field of air conditioning equipment, in particular to an air conditioner.

Background

The traditional air conditioner system mainly comprises a compressor, a condenser, a throttle valve and an evaporator, wherein a four-way valve is additionally arranged for cold and hot switching so that the condenser and the evaporator can be interchanged, and the switching of cooling and heating is realized. In the heating process, the surface of the outdoor heat exchanger can frost, and the frost can influence the heat exchange performance of the outdoor heat exchanger. When frost on the outdoor heat exchanger needs to be removed, the four-way valve is needed to be reversed, the condenser and the evaporator are exchanged at the moment, and the frost of the condenser is melted by adopting indoor heat absorption, so that the indoor heating effect is reduced, and the comfort is influenced.

In order to solve the problem that the defrosting process can affect the indoor temperature, researchers improve the existing air conditioner, for example, an electric heater is added on an outdoor heat exchanger, although the method can defrost the outdoor heat exchanger under the condition that the room temperature is not affected, the energy consumption of electric heating is high, and the defrosting efficiency is low.

In view of the above problems, there is a need for an air conditioner that can continuously heat and defrost with high defrosting efficiency and low energy consumption, without causing too much influence on the indoor temperature during the heating and defrosting process, and without causing the problem of influencing the comfort of the air conditioner due to the abnormal throttling noise suddenly appearing in the room caused by stopping the air conditioner.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an air conditioner which can realize that the indoor temperature is not greatly influenced in the heating and defrosting process.

An air conditioner according to an embodiment of the present invention includes: a compressor, a compression assembly of the compressor comprising: the air cylinder comprises a first air cylinder and a second air cylinder, wherein the first air cylinder is provided with a first air suction port and a first exhaust port, the second air cylinder is provided with a second air suction port and a second exhaust port, the first air cylinder and the second air cylinder are arranged in series, and a connecting channel is arranged between the first exhaust port and the second air suction port; an indoor-side heat exchanger; an outdoor side heat exchanger including; at least two outdoor heat exchange units arranged in parallel; the throttling device is respectively connected with the indoor side heat exchanger and the outdoor side heat exchanger; the four-way valve comprises a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port is connected with the second exhaust port, the second valve port is connected with the first air suction port, the third valve port is connected with the outdoor heat exchanger, and the fourth valve port is connected with the indoor heat exchanger; a reversing assembly connected between the outdoor heat exchanger and the third port; one end of the connecting pipe is connected with the reversing assembly, and the other end of the connecting pipe is connected with the first exhaust port; the reversing assembly has a first working state and a second working state, and in the first working state, the reversing assembly cuts off the connecting pipe and communicates all the outdoor heat exchange units with the third valve port; in the second working state, the reversing assembly communicates at least one outdoor heat exchange unit with the third valve port, and at least one outdoor heat exchange unit communicates with the connecting pipe; the air conditioner is provided with a refrigerating mode, a heating mode and a heating defrosting mode, wherein in the refrigerating mode, the first valve port and the third valve port in the four-way valve are communicated, the second valve port and the fourth valve port are communicated, the reversing assembly is in the first working state, in the heating mode, the first valve port and the fourth valve port in the four-way valve are communicated, the second valve port and the third valve port are communicated, the reversing assembly is in the first working state, in the heating defrosting mode, the first valve port and the fourth valve port in the four-way valve are communicated, the second valve port and the third valve port are communicated, and the reversing assembly is in the second working state.

According to the air conditioner provided by the embodiment of the invention, the air conditioner is provided with the plurality of outdoor heat exchange units, the reversing assembly and the connecting pipe which are connected with the outdoor heat exchange units, the reversing assembly is provided with a first working state which is used for communicating all the outdoor heat exchange units with the third valve, and a second working state which is used for communicating at least one outdoor heat exchange unit with the third valve, and communicating at least one outdoor heat exchange unit with the connecting pipe, so that the influence of the air conditioner on the indoor temperature in the heating and defrosting process is reduced, and the problem that the comfort of the air conditioner is influenced due to abnormal throttling in a room caused by sudden stop of a heating cycle is avoided. In addition, the defrosting effect of the air conditioner is improved, and the defrosting energy consumption of the air conditioner is reduced.

In some embodiments, the first inlet has a pressure of ps1, the first outlet has a pressure of pd1, the second inlet has a pressure of ps2, and the second outlet has a pressure of pd2, with ps1, pd1, ps2, pd2 satisfying the relationship: ps1 < pd1, pd1 ≥ ps2, ps2 < pd 2.

In some embodiments, the outdoor heat exchanger includes two first and second outdoor heat exchange units arranged in parallel, the direction switching assembly includes a first switching valve and a second switching valve, the first and second switching valves are arranged corresponding to one outdoor heat exchange unit, each of the first and second switching valves includes an a port, a B port and a C port, the a port of the first switching valve is connected to the first outdoor heat exchange unit, the a port of the second switching valve is connected to the second outdoor heat exchange unit, the B ports of the first and second switching valves are connected to the third ports, respectively, and the C ports of the first and second switching valves are connected to the connection pipe, respectively; wherein:

the first switching valve has three modes: in the first mode: the port A of the first switching valve is communicated with the port B, and the port C is disconnected; in the second mode: the port A of the first switching valve is communicated with the port C, and the port B is disconnected; the third mode: the port B of the first switching valve is communicated with the port C, and the port A is disconnected; the second switching valve has three modes: in the first mode: the port A of the second switching valve is communicated with the port B, and the port C is disconnected; in the second mode: the port A of the second switching valve is communicated with the port C, and the port B is disconnected; the third mode: the port B of the second switching valve is communicated with the port C, and the port A is disconnected; in addition; the four-way valve, the first switching valve and the second switching valve have the following four communication modes: the first communication mode is as follows: the first valve port of the four-way valve is communicated with the third valve port, the second valve port of the four-way valve is communicated with the fourth valve port, the port A of the first switching valve is communicated with the port B, the port A of the second switching valve is communicated with the port B, and the air conditioner operates in the cooling mode; the second communication mode: a first valve port and a fourth valve port of the four-way valve are communicated, the second valve port and the third valve port are communicated, the port A and the port B of the first switching valve are communicated, the port A and the port B of the second switching valve are communicated, and the air conditioner operates in the heating mode; the third communication mode: a first valve port of the four-way valve is communicated with a fourth valve port, a second valve port of the four-way valve is communicated with a third valve port, a port A of the first switching valve is communicated with a port C, a port A of the second switching valve is communicated with a port B, the air conditioner operates in the heating defrosting mode, and the first outdoor heat exchange unit is used for defrosting; the fourth communication mode: the first valve port and the fourth valve port of the four-way valve are communicated, the second valve port and the third valve port are communicated, the port A and the port B of the first switching valve are communicated, the port A and the port C of the second switching valve are communicated, the air conditioner operates in a heating defrosting mode, and the second outdoor heat exchange unit is used for defrosting.

In some embodiments, the air conditioner further comprises: the defrosting temperature-sensing bulbs are arranged corresponding to the outdoor heat exchange units, and the reversing assembly switches states according to detection results of the defrosting temperature-sensing bulbs.

In some embodiments, a plurality of the outdoor heat exchange units are arranged side by side, and the largest heat exchange surfaces of two adjacent outdoor heat exchange units are correspondingly arranged.

In some embodiments, adjacent two outdoor heat exchange units have a set distance therebetween.

In some embodiments, the air conditioner further comprises: the gas-liquid separator is connected between the indoor heat exchanger and the outdoor heat exchanger in series and is provided with a gas separation port; and one end of the air supplementing pipe is connected with the gas separation port, and the other end of the air supplementing pipe is connected with the second exhaust port.

In some embodiments, the throttling device comprises a plurality of throttling valves, at least one throttling valve is arranged between each outdoor heat exchange unit and the gas-liquid separator, and at least one throttling valve is arranged between the gas-liquid separator and the indoor side heat exchanger.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a refrigerant flow diagram in a cooling mode of an air conditioner according to an embodiment of the present invention.

Fig. 2 is a refrigerant flow diagram in a heating mode of the air conditioner according to the embodiment of the present invention.

Fig. 3 is a heating and defrosting mode of the air conditioner according to the embodiment of the present invention, and a refrigerant flow diagram of the first outdoor heat exchange unit under defrosting.

Fig. 4 is a heating and defrosting mode of the air conditioner according to the embodiment of the present invention, and a refrigerant flow diagram of the second outdoor heat exchange unit under defrosting.

Reference numerals:

an air conditioner 100,

A compressor 1,

A first cylinder 11, a first intake port 111, a first exhaust port 112,

A second cylinder 12, a second intake port 121, a second exhaust port 122,

A connecting channel 13,

An indoor side heat exchanger 2,

An outdoor side heat exchanger 3, an outdoor heat exchange unit 31, a first outdoor heat exchange unit 311, a second outdoor heat exchange unit 312,

A throttle device 4, a throttle valve 41, a throttle unit 42,

Four-way valve 5, first port 51, second port 52, third port 53, fourth port 54,

A reversing component 6, a first switching valve 61, a second switching valve 62,

A connecting pipe 7,

A gas-liquid separator 8, a gas separation port 81,

And a gas supplementing pipe 9.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

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 invention 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 invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A specific structure of the air conditioner 100 according to the embodiment of the present invention is described below with reference to fig. 1 to 4.

As shown in fig. 1, an air conditioner 100 according to an embodiment of the present invention includes a compressor 1, an indoor side heat exchanger 2, an outdoor side heat exchanger 3, a throttle device 4, a four-way valve 5, a reversing assembly 6, and a connection pipe 7, wherein a compression assembly of the compressor 1 includes a first cylinder 11 and a second cylinder 12, the first cylinder 11 has a first suction port 111 and a first exhaust port 112, the second cylinder 12 has a second suction port 121 and a second exhaust port 122, the first cylinder 11 and the second cylinder 12 are arranged in series, and a connection passage 13 is provided between the first exhaust port 112 and the second suction port 121. The outdoor heat exchanger 3 comprises at least two outdoor heat exchange units 31 which are arranged in parallel, the throttling device 4 is respectively connected with the indoor heat exchanger 2 and the outdoor heat exchanger 3, the four-way valve 5 comprises a first valve port 51, a second valve port 52, a third valve port 53 and a fourth valve port 54, the first valve port 51 is connected with a second exhaust port 122, the second valve port 52 is connected with a first air suction port 111, the third valve port 53 is connected with the outdoor heat exchanger 3, the fourth valve port 54 is connected with the indoor heat exchanger 2, the reversing assembly 6 is connected between the outdoor heat exchanger 3 and the third valve port 53, one end of the connecting pipe 7 is connected with the reversing assembly 6, and the other end of the connecting pipe 7 is connected with the first exhaust port 112. The reversing assembly 6 has a first working state and a second working state, in the first working state, the reversing assembly 6 cuts off the connecting pipe 7 and connects all the outdoor heat exchange units 31 with the third valve port 53; in the second working state, the reversing assembly 6 communicates the at least one outdoor heat exchange unit 31 with the third valve port 53, and the at least one outdoor heat exchange unit 31 communicates with the connection pipe 7.

The air conditioner 100 has a cooling mode, a heating mode, and a defrosting mode, in which the first port 51 communicates with the third port 53, the second port 52 communicates with the fourth port 54, the reversing assembly 6 is in the first operating state, in the heating mode, the first port 51 communicates with the fourth port 54, the second port 52 communicates with the third port 53, the reversing assembly 6 is in the first operating state, in the defrosting mode, the first port 51 communicates with the fourth port 54, the second port 52 communicates with the third port 53, and the reversing assembly 6 is in the second operating state.

It can be understood that, in a normal heating operation state of the air conditioner 100, the refrigerant enters the first cylinder 11 from the first air intake 111, is compressed in the first cylinder 11 and then is discharged from the first air exhaust 112, at this time, the reversing assembly 6 is in the first operation state, that is, at this time, the refrigerant can only enter the second cylinder 12 from the second air intake 121 after passing through the connecting channel 13, and after being compressed in the second cylinder 12, the refrigerant leaves the compressor 1 from the second air exhaust 122, and sequentially passes through the indoor side heat exchanger 2, the throttling device 4 and all the outdoor heat exchange units 31 and returns to the compressor 1. Thus, a complete heating cycle is completed. Of course, the refrigeration cycle of the air conditioner 100 is similar to the above process, and will not be described herein.

When the outdoor heat exchanger 3 of the air conditioner 100 needs defrosting, the control device of the air conditioner 100 switches the reversing assembly 6 to the second working state, at this time, the refrigerant enters the first cylinder 11 from the first air intake port 111, is compressed by the first cylinder 11 and then is discharged from the first exhaust port 112, at this time, the reversing assembly 6 is in the second working state, that is, a part of the refrigerant sequentially returns to the compressor 1 through the indoor heat exchanger 2, the throttling device 4 and the at least one outdoor heat exchange unit 31, thereby completing a complete heating cycle. The other part of the refrigerant directly enters one of the outdoor heat exchange units 31 through the connection pipe 7, and because the refrigerant discharged from the first discharge port 112 has a high temperature, the outdoor heat exchange unit 31 connected to the first discharge port 112 can perform defrosting. That is, at this time, the outdoor heat exchange unit 31 connected to the third valve 53 is in a heating state, and the outdoor heat exchange unit 31 connected to the first exhaust port 112 is in a defrosting state, so that the air conditioner 100 according to the embodiment of the present invention can ensure a normal heating cycle in a defrosting process, that is, the air conditioner 100 according to the present invention achieves a heating and defrosting process, and the air conditioner 100 according to the embodiment of the present invention does not have a great influence on an indoor temperature, and does not generate a problem that an abnormal throttling occurs in a room due to a sudden stop of a heating cycle to affect the comfort of the air conditioner. In addition, the air conditioner 100 of the embodiment of the present invention uses the outdoor heat exchange unit 31 as its own defrosting structure, so as to improve the defrosting effect of the air conditioner 100 and reduce the defrosting energy consumption of the air conditioner 100.

According to the air conditioner 100 of the embodiment of the invention, as the plurality of outdoor heat exchange units 31, the reversing assembly 6 and the connecting pipe 7 are connected with the outdoor heat exchange units, the reversing assembly 6 has the first working state of communicating all the outdoor heat exchange units 31 with the third valve port 53, and the second working state of communicating at least one outdoor heat exchange unit 31 with the third valve port 53 and at least one outdoor heat exchange unit 31 with the connecting pipe 7, the influence of the air conditioner 100 on the indoor temperature in the heating and defrosting process is reduced, and the problem that the use comfort of the air conditioner 100 is influenced due to abnormal throttling in a room caused by sudden stop of a heating cycle is avoided. In addition, the defrosting effect of the air conditioner 100 is improved, and the defrosting energy consumption of the air conditioner 100 is reduced.

In addition, it should be noted that, in the defrosting process of the air conditioner 100 of the present invention, the plurality of outdoor heat exchange units 31 can implement cross defrosting, which can ensure the defrosting speed of the air conditioner 100 and also ensure that the air conditioner 100 is always in a heating state, thereby greatly improving the customer satisfaction of the air conditioner 100.

In some embodiments, the pressure at the first inlet 111 is ps1, the pressure at the first outlet 112 is pd1, the pressure at the second inlet 121 is ps2, the pressure at the second outlet 122 is pd2, and the relationship between ps1, pd1, ps2, and pd2 is satisfied: ps1 < pd1, pd1 ≥ ps2, ps2 < pd 2. It can be understood that the exhaust air pressure of the first exhaust port 112 is greater than the suction air pressure of the second suction port 121, which indicates that the temperature of the refrigerant in the first exhaust port 112 is higher than the temperature of the refrigerant in the second suction port 121, so that a certain temperature drop exists between the refrigerant in the first exhaust port 112 and the second suction port 121, which prevents the refrigerant from having an excessively high temperature after the refrigerant is compressed in the second cylinder 12, ensures the safety of the compressor 1 to a certain extent, and improves the operational reliability of the compressor 1.

In some embodiments, as shown in fig. 1, the outdoor side heat exchanger 2 includes a first outdoor heat exchange unit 311 and a second outdoor heat exchange unit 312 arranged in parallel. The reversing assembly 6 comprises a first switching valve 61 and a second switching valve 62, the first switching valve 61 and the second switching valve 62 are respectively arranged corresponding to the first outdoor heat exchange unit 311 and the second outdoor heat exchange unit 312, the first switching valve 61 and the second switching valve 62 respectively comprise an A port, a B port and a C port, the A port of the first switching valve 61 is connected with the first outdoor heat exchange unit 311, the A port of the second switching valve is connected with the second outdoor heat exchange unit 312, the B ports of the first switching valve 61 and the second switching valve 62 are respectively connected with the third valve port 53 of the four-way valve 5, and the C ports of the first switching valve 61 and the second switching valve 62 are respectively connected with the connecting pipe 7.

The first switching valve 61 and the second switching valve 62 have three types of on modes, respectively. In the first on mode, the port a of the first switching valve 61 communicates with the port B, and the port C is closed; in the second on mode, the port a of the first switching valve 61 communicates with the port C, and the port B is off; in a third switching mode: the port B of the first switching valve 61 communicates with the port C, and the port a is cut off.

In the second switching valve 62, in the first on mode, the port a and the port B of the second switching valve 62 are communicated, and the port C is disconnected; in the second on mode, port a and port C of the second switching valve 62 are connected, and port B is disconnected; in a third switching mode: the port B of the second switching valve 62 communicates with the port C, and the port a is blocked.

The four-way valve 5, the first switching valve 61, and the second switching valve 62 have the following four-way communication system:

the first communication mode is as follows: the first port 51 and the third port 53 of the four-way valve 5 are communicated, the second port 52 and the fourth port 54 are communicated, the port a and the port B of the first switching valve 61 are communicated, the port a and the port B of the second switching valve 62 are communicated, and the air conditioner 100 is in a cooling mode at this time;

the second communication mode: when the first port 51 and the fourth port 54 of the four-way valve 5 are communicated, the second port 52 and the third port 53 are communicated, the port a and the port B of the first switching valve 61 are communicated, and the port a and the port B of the second switching valve 62 are communicated, the air conditioner 100 is in the heating mode;

the third communication mode: when the first port 51 and the fourth port 54 of the four-way valve 5 are communicated, the second port 52 and the third port 53 are communicated, the port a and the port C of the first switching valve 61 are communicated, and the port a and the port B of the second switching valve 62 are communicated, the air conditioner 100 is in the heating and defrosting mode, and the first outdoor heat exchange unit 311 is defrosted;

the fourth communication mode: when the first port 51 and the fourth port 54 of the four-way valve 5 are communicated, the second port 52 and the third port 53 are communicated, the port a and the port B of the first switching valve 61 are communicated, and the port a and the port C of the second switching valve 62 are communicated, the air conditioner 100 is in the heating and defrosting mode, and the second outdoor heat exchange unit 312 is defrosted.

It can be understood that each outdoor heat exchange unit 31 is correspondingly provided with a switching valve, which can better realize the switching between the heating state and the defrosting state of the outdoor heat exchange unit 31, thereby simplifying the structure of the air conditioner 100 to a certain extent. Of course, the reversing assembly 6 may also be formed as other valve sets in the embodiment of the present invention, and is not limited to the switching valve.

Advantageously, the first and

second switching valves

61, 62 are solenoid valves, it being understood that when the first and

second switching valves

61, 62 are solenoid valves, the first and

second switching valves

61, 62 may include an energized state and a de-energized state, and when in the de-energized state, the ports a and C are in communication and the ports a and B are not in communication. When the power is on, the port A is communicated with the port B, and the port A is not communicated with the port C. Therefore, the air conditioner 100 can conveniently control the reversing component 6, and the defrosting timeliness of the air conditioner 100 is guaranteed.

In some embodiments, as shown in fig. 1, the air conditioner 100 further includes a defrosting bulb (not shown) disposed corresponding to the plurality of outdoor heat exchanging units 31, and the reversing component 6 switches the state according to the detection result of the defrosting bulb. It can be understood that each outdoor heat exchange unit 31 is provided with a defrosting temperature sensing bulb, the defrosting temperature sensing bulb can detect the temperature outside the outdoor heat exchange unit 31 to judge whether the outdoor heat exchange unit 31 has an excessively thick frost layer, when the defrosting temperature sensing bulb detects that a certain outdoor heat exchange unit 31 has an excessively thick frost layer, the air conditioner 100 can control the reversing assembly 6 to be in a defrosting state, so that timely defrosting of the outdoor heat exchange unit 31 is better ensured, and the heating efficiency of the air conditioner 100 is ensured.

In some embodiments, as shown in fig. 1, a plurality of outdoor heat exchange units 31 are arranged side by side, and the largest heat exchange surfaces of two adjacent outdoor heat exchange units 31 are correspondingly arranged. It can be understood that when a certain outdoor heat exchange unit 31 is in a defrosting state, the outdoor heat exchange unit 31 is in a heat releasing state, and the maximum heat exchange surfaces of two adjacent outdoor heat exchange units 31 are correspondingly arranged, so that the outdoor heat exchange unit 31 can function to melt the frost layer of the adjacent outdoor heat exchange unit 31. Therefore, the maximum heat exchange surfaces of two adjacent outdoor heat exchange units 31 are correspondingly arranged, so that the defrosting time of the outdoor heat exchange units 31 can be better shortened, and the heating efficiency of the air conditioner 100 can be better ensured.

In some embodiments, as shown in fig. 1, a set distance is provided between two adjacent outdoor heat exchange units 31, and it can be understood that the heat exchange efficiency of the two outdoor heat exchange units 31 is affected by an excessively close distance between the two adjacent outdoor heat exchange units 31, so that a certain distance is provided between two adjacent outdoor heat exchange units 31, which not only can ensure the heat exchange efficiency of each outdoor heat exchange unit 31, but also can ensure that when one outdoor heat exchange unit 31 is in a defrosting state, a certain defrosting effect is provided for the other outdoor heat exchange unit 31, thereby ensuring the defrosting efficiency of each outdoor heat exchange unit 31.

In some embodiments, as shown in fig. 1, the air conditioner 100 further includes a gas-liquid separator 8 and a gas supply pipe 9, the gas-liquid separator 8 is connected in series between the indoor heat exchanger 2 and the outdoor heat exchanger 3, the gas-liquid separator 8 has a gas separation port 81, one end of the gas supply pipe 9 is connected to the gas separation port 81, and the other end of the gas supply pipe 9 is connected to the second suction port 121. It can be understood that, in the refrigeration process, the refrigerant is discharged from the compressor 1 and then sequentially passes through the outdoor heat exchanger 3, the gas-liquid separator 8 and the indoor heat exchanger 2, the refrigerant passing through the outdoor heat exchanger 3 is in a gas-liquid mixed state, and the liquid refrigerant enters the indoor heat exchanger 2 after passing through the gas-liquid separator 8, so that the heat exchange effect is ensured, the refrigeration effect of the air conditioner 100 is ensured, and the gaseous refrigerant enters the connecting channel 13 to be mixed with the refrigerant discharged from the first exhaust port 112, so that on one hand, the temperature of the refrigerant entering the second air suction port 121 is reduced, the overheating phenomenon of the compressor 1 is avoided, on the other hand, the effects of increasing air and supplementing enthalpy are achieved, and the overall energy efficiency of the air conditioner 100 is improved.

In the heating process, the refrigerant is discharged from the compressor 1 and then sequentially passes through the indoor heat exchanger 2, the gas-liquid separator 8 and the outdoor heat exchanger 3, the refrigerant passing through the outdoor heat exchanger 3 is in a gas-liquid mixed state, and the liquid refrigerant enters the outdoor heat exchanger 3 after passing through the gas-liquid separator 8, so that the heat exchange effect is ensured, the gaseous refrigerant enters the connecting channel 13 and is mixed with the refrigerant discharged from the first exhaust port 112, on one hand, the temperature of the refrigerant entering the second air suction port 121 is reduced, the overheating phenomenon of the compressor 1 is avoided, on the other hand, the effects of increasing air and supplementing enthalpy are achieved, and the overall energy efficiency of the air conditioner 100 is improved.

In some embodiments, as shown in fig. 1, in the flow direction of the cooling medium in the connection channel 13, the connection port of the air supply pipe 9 and the connection channel 13 is located downstream of the connection port of the connection pipe 7 and the connection channel 13. Therefore, the possibility that the gaseous refrigerant with relatively low temperature separated by the gas-liquid separator 8 enters the connecting pipe 7 is reduced, and the defrosting effect of the outdoor heat exchange unit 31 in a defrosting state is ensured.

In some embodiments, as shown in fig. 1, the throttling device 4 includes a plurality of throttling valves 41, and the throttling valves 41 are provided between the gas-liquid separator 8 and the indoor-side heat exchanger 2. Therefore, the pressure drop of the liquid refrigerant flowing out of the gas-liquid separator 8 after passing through the throttle valve 41 can be realized, so that the liquid refrigerant can be better subjected to heat absorption and evaporation, and the heat exchange efficiency of the indoor side heat exchanger 2 or the outdoor side heat exchanger 3 is ensured. One end of a part of the throttle valves 41 is connected to one outdoor heat exchange unit 31, and the other end is connected to the indoor side heat exchanger 2. Therefore, in the process of refrigeration, the pressure drop of the liquid refrigerant flowing out of the outdoor heat exchanger 3 can be realized after passing through the throttle valve 41, so that the liquid refrigerant can be better absorbed and evaporated, and the heat exchange efficiency of the indoor heat exchanger 2 is ensured.

Example (b):

an air conditioner 100 according to an embodiment of the present invention will be described with reference to fig. 1 to 4.

The air conditioner 100 of the present embodiment includes a compressor 1, an indoor side heat exchanger 2, an outdoor side heat exchanger 3, a throttle device 4, a four-way valve 5, a reversing assembly 6, a connecting pipe 7, a gas-liquid separator 8, and a gas supply pipe 9.

The compression assembly of the compressor 1 comprises a first cylinder 11 and a second cylinder 12, wherein the first cylinder 11 has a first air inlet 111 and a first air outlet 112, the second cylinder 12 has a second air inlet 121 and a second air outlet 122, the first cylinder 11 and the second cylinder 12 are arranged in series, and a connecting channel 13 is arranged between the first air outlet 112 and the second air inlet 121.

The outdoor heat exchanger 3 includes two outdoor heat exchange units 31 connected in parallel, which will be referred to as a first outdoor heat exchange unit 311 and a second outdoor heat exchange unit 312 for convenience of description, and the four-way valve 5 includes a first valve port 51, a second valve port 52, a third valve port 53, and a fourth valve port 54, the first valve port 51 is connected to the second exhaust port 122, the second valve port 52 is connected to the first intake port 111, the third valve port 53 is connected to the outdoor heat exchanger 3, and the fourth valve port 54 is connected to the indoor heat exchanger 2.

The direction changing assembly 6 includes a first switching valve 61 and a second switching valve 62, the first switching valve 61 is disposed corresponding to the first outdoor heat exchanging unit 311, and the second switching valve 62 is disposed corresponding to the second outdoor heat exchanging unit 312. Each switching valve 61 includes a port a, a port B, and a port C. The port A is connected with the outdoor heat exchange unit 31, the port B is connected with the third valve port 53, and the port C is connected with the connecting pipe 7. One end of the connection pipe 7 is connected to the reversing assembly 6, and the other end of the connection pipe 7 is connected to the first exhaust port 112. The direction changing assembly 6 has a first operating state in which the direction changing assembly 6 cuts off the connection pipe 7 and connects all the outdoor heat exchange units 31 to the third port 53, and the ports a and B of the first and

second switching valves

61 and 62 are connected and the port C is closed. In the second operating state, the reversing assembly 6 connects one outdoor heat exchange unit 31 with the third port 53, and the other outdoor heat exchange unit 31 with the connecting pipe 7, that is, the port a of one of the first switching valve 61 and the second switching valve 62 is connected with the port C, and the port B is closed, and the port a of the other one is connected with the port B, and the port C is closed.

The gas-liquid separator 8 is connected in series between the indoor-side heat exchanger 2 and the outdoor-side heat exchanger 3, the gas-liquid separator 8 has a gas separation port 81, one end of the gas supply pipe 9 is connected to the gas separation port 81, and the other end of the gas supply pipe 9 is connected to the second suction port 121.

The throttling device 4 includes three throttling valves 41, one throttling valve 41 is disposed between the gas-liquid separator 8 and the indoor-side heat exchanger 2, and the other two throttling valves 41 are respectively connected between the first outdoor heat exchange unit 311 and the gas-liquid separator 8 and between the second outdoor heat exchange unit 312 and the gas-liquid separator 8.

The air conditioner 100 of the present embodiment has four operating conditions, which are specifically as follows:

a refrigeration mode:

as shown in fig. 1, the port a of the first switching valve 61 communicates with the port B, the port a of the second switching valve 62 communicates with the port B, the first port 51 of the four-way valve 5 communicates with the third port 53, and the second port 52 of the four-way valve 5 communicates with the fourth port 54. In this state, the make-up air of the first exhaust port 112 and the gas-liquid separator 8 is mixed and enters the second cylinder 12 to complete the whole system cycle, and the first exhaust port 112 is not communicated with the outdoor heat exchanger 3 in the process, which is beneficial to improving the energy efficiency in the refrigeration operation mode.

Heating mode:

as shown in fig. 2, the port a of the first switching valve 61 communicates with the port B, the port a of the second switching valve 62 communicates with the port B, the first port 51 of the four-way valve 5 communicates with the fourth port 54, and the second port 52 of the four-way valve 5 communicates with the third port 53. In this state, the first exhaust port 112 and the air supply of the gas-liquid separator 8 are mixed and enter the second cylinder 12 to complete the whole system cycle, and the two outdoor heat exchange units 31 are connected in parallel to be used as evaporators, and the first exhaust port 112 is not communicated with the two outdoor heat exchange units 31 in the process, so that the heat exchange area of the outdoor heat exchanger 3 is increased, and the heating capacity of the system can be increased.

Heating and defrosting mode, and the first outdoor heat exchange unit 311 defrosts:

as shown in fig. 3, the port a of the first switching valve 61 is communicated with the port C, the port a of the second switching valve 62 is communicated with the port B, the first port 51 of the four-way valve 5 is communicated with the fourth port 54, and the second port 52 is communicated with the third port 53, and in this state, the first exhaust port 112 is communicated with the first outdoor heat exchange unit 311, so that the superheated gas compressed by the first cylinder 11 passing through the first outdoor heat exchange unit 311 can be defrosted by the heat of the superheated gas, and after defrosting is finished, the heating mode can be continuously recovered. When the first outdoor heat exchange unit 311 is defrosted, the second outdoor heat exchange unit 312 and the indoor heat exchanger 2 still form a complete heating cycle, that is, the air conditioner 100 is still heating at this time, so that the indoor temperature is not changed obviously, and the comfort of the user is improved.

Heating and defrosting mode, and the first outdoor heat exchange unit 312 defrosts:

as shown in fig. 4, the port a of the first switching valve 61 is communicated with the port B, the port a of the second switching valve 62 is communicated with the port B, the first port 51 of the four-way valve 5 is communicated with the fourth port 54, and the second port 52 is communicated with the third port 53, and in this state, the first exhaust port 112 is communicated with the second outdoor heat exchange unit 312, so that the superheated gas compressed by the first cylinder 11 passing through the second outdoor heat exchange unit 312 can be defrosted by the heat of the superheated gas, and after defrosting is finished, the heating mode can be continuously recovered. When the second outdoor heat exchange unit 312 is defrosted, the first outdoor heat exchange unit 311 and the indoor side heat exchanger 2 still form a complete heating cycle, that is, the air conditioner 100 is still heating at this time, so that the indoor temperature is not obviously changed, and the comfort of the user is improved.

The air conditioner 100 of the present embodiment has advantages in that: the plurality of outdoor heat exchange units 31 of the air conditioner 100 are arranged in parallel, and the communication mode between the outdoor heat exchange units 31 and the four-way valve 5 and the switching valve 61 is controlled by the reversing assembly 6. When the outdoor heat exchange unit 31 is communicated with the low-pressure stage exhaust port of the compressor 1, the outdoor heat exchange unit 31 connected in series with the first exhaust port 112 performs defrosting, and the other outdoor heat exchange units 31 not requiring defrosting are communicated with the third valve port 53 of the four-way valve 5 to perform a normal heating cycle. Therefore, the problem that the air conditioner 100 is comfortable to use due to abnormal throttling noise suddenly occurring in a room caused by stopping the air conditioner can be solved, and the air conditioner 100 has high defrosting efficiency and low energy consumption.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily 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.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An air conditioner, comprising:

a compressor, a compression assembly of the compressor comprising: the air cylinder comprises a first air cylinder and a second air cylinder, wherein the first air cylinder is provided with a first air suction port and a first exhaust port, the second air cylinder is provided with a second air suction port and a second exhaust port, the first air cylinder and the second air cylinder are arranged in series, and a connecting channel is arranged between the first exhaust port and the second air suction port;

an indoor-side heat exchanger;

an outdoor side heat exchanger, the outdoor side heat exchanger comprising: at least two outdoor heat exchange units arranged in parallel;

the throttling device is respectively connected with the indoor side heat exchanger and the outdoor side heat exchanger;

the four-way valve comprises a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port is connected with the second exhaust port, the second valve port is connected with the first air suction port, the third valve port is connected with the outdoor heat exchanger, and the fourth valve port is connected with the indoor heat exchanger;

a reversing assembly connected between the outdoor heat exchanger and the third port;

one end of the connecting pipe is connected with the reversing assembly, and the other end of the connecting pipe is connected with the first exhaust port;

the gas-liquid separator is connected between the indoor heat exchanger and the outdoor heat exchanger in series and is provided with a gas separation port;

one end of the air supplementing pipe is connected with the gas separation port, the other end of the air supplementing pipe is connected with the second air suction port, and the other end of the air supplementing pipe is located between the other end of the connecting pipe and the second air suction port; wherein the content of the first and second substances,

the reversing assembly has a first working state and a second working state, and in the first working state, the reversing assembly cuts off the connecting pipe and respectively communicates all the outdoor heat exchange units with the third valve port; in the second working state, the reversing assembly communicates at least one outdoor heat exchange unit with the third valve port, and at least one outdoor heat exchange unit communicates with the connecting pipe;

the air conditioner is provided with a refrigeration mode, a heating mode and a heating defrosting mode, in the refrigeration mode, the first valve port and the third valve port in the four-way valve are communicated, the second valve port and the fourth valve port are communicated, and the reversing group is in the first working state; in the heating mode, the first valve port and the fourth valve port in the four-way valve are communicated, the second valve port and the third valve port are communicated, and the reversing group is in the first working state; in the heating and defrosting mode, the first valve port and the fourth valve port in the four-way valve are communicated, the second valve port and the third valve port are communicated, and the reversing group is in the second working state.

2. The air conditioner as claimed in claim 1, wherein the air pressure at the first suction port is ps1, the air pressure at the first discharge port is pd1, the air pressure at the second suction port is ps2, the air pressure at the second discharge port is pd2, and the relationships of ps1, pd1, ps2, and pd2 are satisfied: ps1 < pd1, pd1 ≥ ps2, ps2 < pd 2.

3. The air conditioner according to claim 1, wherein the outdoor side heat exchanger comprises two first and second outdoor heat exchange units arranged in parallel; the reversing assembly comprises a first switching valve and a second switching valve, the first switching valve and the second switching valve are respectively arranged corresponding to the first outdoor heat exchange unit and the second outdoor heat exchange unit, the first switching valve and the second switching valve respectively comprise an A port, a B port and a C port, the A port of the first switching valve is connected with the first outdoor heat exchange unit, the A port of the second switching valve is connected with the second outdoor heat exchange unit, the B ports of the first switching valve and the second switching valve are respectively connected with the third ports, and the C ports of the first switching valve and the second switching valve are respectively connected with the connecting pipe; wherein:

the first switching valve has three modes of connection:

first switching-on mode: the port A of the first switching valve is communicated with the port B, and the port C is disconnected;

second switching on mode: the port A of the first switching valve is communicated with the port C, and the port B is disconnected;

the third switching mode: the port B of the first switching valve is communicated with the port C, and the port A is disconnected;

the second switching valve has three modes of connection:

first switching-on mode: the port A of the second switching valve is communicated with the port B, and the port C is disconnected;

second switching on mode: the port A of the second switching valve is communicated with the port C, and the port B is disconnected;

the third switching mode: the port B of the second switching valve is communicated with the port C, and the port A is disconnected;

in addition;

the four-way valve, the first switching valve and the second switching valve have the following four communication modes:

the first communication mode is as follows: the first valve port of the four-way valve is communicated with the third valve port, the second valve port of the four-way valve is communicated with the fourth valve port, the port A of the first switching valve is communicated with the port B, the port A of the second switching valve is communicated with the port B, and the air conditioner operates in the cooling mode;

the second communication mode: a first valve port and a fourth valve port of the four-way valve are communicated, the second valve port and the third valve port are communicated, the port A and the port B of the first switching valve are communicated, the port A and the port B of the second switching valve are communicated, and the air conditioner operates in the heating mode;

the third communication mode: a first valve port of the four-way valve is communicated with a fourth valve port, a second valve port of the four-way valve is communicated with a third valve port, a port A of the first switching valve is communicated with a port C, a port A of the second switching valve is communicated with a port B, the air conditioner operates in the heating defrosting mode, and the first outdoor heat exchange unit is used for defrosting;

the fourth communication mode: the first valve port and the fourth valve port of the four-way valve are communicated, the second valve port and the third valve port are communicated, the port A and the port B of the first switching valve are communicated, the port A and the port C of the second switching valve are communicated, the air conditioner operates in a heating defrosting mode, and the second outdoor heat exchange unit is used for defrosting.

4. The air conditioner according to claim 1, further comprising: the defrosting temperature-sensing bulbs are arranged corresponding to the outdoor heat exchange units, and the reversing assembly switches states according to detection results of the defrosting temperature-sensing bulbs.

5. The air conditioner as claimed in claim 1, wherein a plurality of said outdoor heat exchange units are arranged side by side, and the largest heat exchange surfaces of two adjacent outdoor heat exchange units are correspondingly arranged.

6. The air conditioner according to claim 5, wherein a set interval is provided between adjacent two of the outdoor heat exchange units.

7. The air conditioner according to claim 1, wherein the throttling means comprises a plurality of throttling valves, at least one throttling valve is provided between each of the outdoor heat exchange units and the gas-liquid separator, and at least one throttling valve is provided between the gas-liquid separator and the indoor-side heat exchanger.