CN114234469A - Air conditioning system and air conditioner - Google Patents

Abstract

The invention relates to an air conditioning system and an air conditioner, comprising a compressor, a four-way valve, a first heat exchange assembly, a main throttling element and a second heat exchange assembly; the second heat exchange assembly comprises a first heat exchange piece and a second heat exchange piece which are communicated with each other, and an auxiliary throttling element is arranged on a passage communicated between the first heat exchange piece and the second heat exchange piece; two water ports of the four-way valve are respectively communicated with an air inlet and an air outlet of the compressor, the other water port of the four-way valve is communicated with a refrigerant port which is not communicated with the second heat exchange part on the first heat exchange part, and the other water port of the four-way valve, the first heat exchange component, the main throttling element and the refrigerant port which is not communicated with the first heat exchange part on the second heat exchange part are sequentially communicated. The dehumidification mode of heating and the refrigeration dehumidification mode of backheating can be carried out, the temperature of discharging indoor air after the cooling dehumidification can be properly promoted under two kinds of dehumidification modes, thereby avoiding the dehumidification in-process indoor temperature to hang down excessively, leading to the relatively poor condition of body feeling travelling comfort to take place.

Description

Air conditioning system and air conditioner

Technical Field

The invention relates to the technical field of air conditioners, in particular to an air conditioning system and an air conditioner.

Background

With the development of the air conditioning technology field, the functions of the air conditioning system are more and more diversified, wherein the refrigeration, heating and dehumidification in the air conditioning field are more and more applied working modes. The dehumidification mainly adopts a refrigeration dehumidification mode, and the refrigerant is utilized to absorb heat in the outside air, so that moisture in the air is condensed and separated out, and the purpose of dehumidification is achieved. The indoor temperature is lower in the dehumidification process, and the body feeling comfort is influenced.

Disclosure of Invention

The invention provides an air conditioning system and an air conditioner aiming at the problems of low indoor temperature and poor somatosensory comfort during dehumidification, and the indoor temperature can be still controlled during dehumidification, so that the effect of no or little temperature reduction during dehumidification is achieved, and the somatosensory comfort is improved.

An air conditioning system comprises a compressor, a four-way valve, a first heat exchange assembly, a main throttling element and a second heat exchange assembly;

the second heat exchange assembly comprises a first heat exchange piece and a second heat exchange piece which are communicated with each other, and an auxiliary throttling element is arranged on a passage communicated between the first heat exchange piece and the second heat exchange piece;

two water ports of the four-way valve are respectively communicated with an air inlet and an air outlet of the compressor, the other water port of the four-way valve is communicated with a refrigerant port which is not communicated with the second heat exchange part on the first heat exchange part, and the other water port of the four-way valve, the first heat exchange assembly, the main throttling element and the refrigerant port which is not communicated with the first heat exchange part on the second heat exchange part are sequentially communicated.

Above-mentioned scheme provides an air conditioning system, can heat dehumidification mode and refrigeration dehumidification backheat mode, and the homoenergetic suitably promotes the temperature of discharging indoor air after cooling dehumidification under two kinds of above dehumidification modes to it is low excessively to avoid dehumidification in-process indoor temperature, leads to the relatively poor condition of body sense travelling comfort to take place. Specifically, in the heating and dehumidifying mode, the primary throttling element and the secondary throttling element are both in a throttling state. The first heat exchange assembly serves as an evaporator, the first heat exchange member serves as a condenser, and the second heat exchange member serves as an evaporator. Therefore, the first heat exchange piece can properly increase the indoor temperature, and the second heat exchange piece is mainly used for refrigeration and dehumidification, so that the effects of dehumidification without temperature reduction or less temperature reduction are comprehensively achieved. In the refrigeration dehumidification regenerative mode, the main throttling element is fully opened, and the auxiliary throttling element is in a throttling state. The first heat exchange component and the second heat exchange piece are both used as condensers, and the first heat exchange piece is used as an evaporator. The high-temperature refrigerant discharged from the exhaust port of the compressor firstly releases heat at the first heat exchange component, then releases heat for the second time at the second heat exchange part, properly controls the indoor temperature, and finally the first heat exchange part performs refrigeration and dehumidification, thereby finally achieving the effect of little or no temperature reduction in dehumidification.

In one embodiment, a refrigerant port of the first heat exchange member, which is not communicated with the second heat exchange member, is a first refrigerant port, a passage communicated between the first refrigerant port and a water port of the four-way valve is a first main passage, a refrigerant port of the second heat exchange member, which is not communicated with the first heat exchange member, is a second refrigerant port, a passage communicated between the second refrigerant port and the main throttling element is a second main passage, a passage communicated between the first heat exchange member and the second heat exchange member is an intermediate passage, and the auxiliary throttling element is disposed on the intermediate passage.

In one embodiment, the air conditioning system further includes a first branch passage and a second branch passage, the first branch passage communicates with the first main passage at one end, the first branch passage communicates with the second main passage at the other end, the second branch passage communicates with the intermediate passage at one end, the second branch passage communicates with the first main passage at the other end, the first main passage communicates with the second branch passage at a position on the first main passage at a position near the four-way valve, the first main passage is a switching passage, and the first branch passage, the second branch passage and the switching passage are selectively switchable.

In one embodiment, one end of the second branch passage communicates with the first main passage through a first multi-way valve;

or a second branch switch valve is arranged on the second branch passage, and a change-over switch valve is arranged on the change-over passage.

In one embodiment, a first branch switch valve is arranged on the first branch passage;

or the first branch switch valve is communicated with the second main passage through a second multi-way valve.

In one embodiment, the air conditioning system further includes a third branch passage and a fourth branch passage, the third branch passage communicates with the second main passage at one end, the third branch passage communicates with the intermediate passage at the other end, the fourth branch passage communicates with the first main passage at one end, the fourth branch passage communicates with the intermediate passage at the other end, and the intermediate passage communicates with the fourth branch passage at a position close to the second heat exchanger at a position in the intermediate passage communicating with the third branch passage, and the third branch passage and the fourth branch passage can be selectively opened and closed.

In one embodiment, a third branch switch valve is arranged on the third branch passage;

or one end of the third branch passage is communicated with the second main passage through a third multi-way valve.

In one embodiment, one end of the fourth branch passage communicates with the first main passage through a fourth multi-way valve;

or a fourth branch switch valve is arranged on the fourth branch passage.

In one embodiment, the first heat exchange element and the second heat exchange element are each a heat exchanger;

or the first heat exchange piece and the second heat exchange piece are two sections of heat exchange tubes which are connected in series in one heat exchanger.

An air conditioner comprises the air conditioning system.

The scheme provides an air conditioner, and mainly adopts the air conditioning system in any embodiment, so that the indoor temperature can be kept at a relatively high level in the dehumidification process, and the effect of little or no temperature reduction in dehumidification is achieved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a system diagram of an air conditioning system according to the present embodiment;

fig. 2 is a refrigerant flow diagram of the air conditioning system shown in fig. 1 in a high-efficiency heating mode;

fig. 3 is a refrigerant flow diagram of the air conditioning system shown in fig. 1 in a heating and dehumidifying mode;

FIG. 4 is a refrigerant flow diagram of the air conditioning system shown in FIG. 1 in a cooling, dehumidifying and backheating mode;

FIG. 5 is a refrigerant flow diagram of the air conditioning system of FIG. 1 in the high efficiency cooling mode;

fig. 6 is a system diagram of an air conditioning system according to another embodiment.

Description of reference numerals:

10. an air conditioning system; 11. a compressor; 12. a four-way valve; 13. a first heat exchange assembly; 14. a primary throttling element; 15. a second heat exchange assembly; 151. a first heat exchange member; 152. a second heat exchange member; 153. an intermediate passage; 16. a secondary throttling element; 17. a first bus path; 171. a first branch path; 1711. a first branch switching valve; 172. a second branch path; 173. switching the path; 174. a first multi-way valve; 175. a heating branch passage; 176. a fifth multi-way valve; 18. a second main path; 181. a third branch passage; 182. a fourth branch path; 183. a third multi-way valve; 184. a fourth multi-way valve; 19. an air supply device.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

As shown in fig. 1 and 6, in one embodiment, there is provided an air conditioning system 10 comprising a compressor 11, a four-way valve 12, a first heat exchange assembly 13, a primary throttling element 14, and a second heat exchange assembly 15;

the second heat exchange assembly 15 comprises a first heat exchange member 151 and a second heat exchange member 152 which are communicated with each other, and an auxiliary throttling element 16 is arranged on a passage communicated between the first heat exchange member 151 and the second heat exchange member 152;

two water ports of the four-way valve 12 are respectively communicated with an air inlet and an air outlet of the compressor 11, another water port of the four-way valve 12 is communicated with a refrigerant port of the first heat exchange member 151 which is not communicated with the second heat exchange member 152, and another water port of the four-way valve 12, the first heat exchange assembly 13, the main throttling element 14 and the refrigerant port of the second heat exchange member 152 which is not communicated with the first heat exchange member 151 are sequentially communicated.

The air conditioning system 10 provided by the above scheme can perform the heating dehumidification mode and the refrigeration dehumidification backheating mode, and can properly increase the temperature of the air discharged into the room after cooling and dehumidification in the above two dehumidification modes, so that the situation that the comfort is poor due to too low indoor temperature in the dehumidification process is avoided.

Specifically, in the heating and dehumidifying mode, as shown in fig. 3, both the primary throttling element 14 and the secondary throttling element 16 are in the throttling state. The first heat exchange unit 13 serves as an evaporator, the first heat exchange member 151 serves as a condenser, and the second heat exchange member 152 serves as an evaporator. Therefore, the first heat exchange member 151 can properly increase the indoor temperature, and the second heat exchange member 152 is mainly used for cooling and dehumidifying, thereby comprehensively achieving the effect of dehumidifying without cooling or with little cooling.

In the cooling dehumidification regenerative mode, as shown in fig. 4, the primary throttling element 14 is fully open and the secondary throttling element 16 is in a throttling state. The first heat exchange assembly 13 and the second heat exchange member 152 are both used as a condenser, and the first heat exchange member 151 is used as an evaporator. The high-temperature refrigerant discharged from the air outlet of the compressor 11 firstly releases heat at the first heat exchange assembly 13, secondly releases heat at the second heat exchange member 152, properly controls the indoor temperature, and finally the first heat exchange member 151 performs refrigeration and dehumidification, thereby finally achieving the effect of little or no temperature reduction in dehumidification.

Specifically, as shown in fig. 1 to 6, in one embodiment, a refrigerant port of the first heat exchanging element 151, which is not communicated with the second heat exchanging element 152, is a first refrigerant port, and a passage communicated between the first refrigerant port and a water inlet of the four-way valve 12 is a first main passage 17. A refrigerant port of the second heat exchanger 152 not communicated with the first heat exchanger 151 is a second refrigerant port, and a passage communicated between the second refrigerant port and the main throttling element 14 is a second main passage 18. The passage communicating between the first heat exchanger 151 and the second heat exchanger 152 is an intermediate passage 153. The secondary throttling element 16 is disposed on the intermediate passage 153.

Further, as shown in fig. 1, in one embodiment, the air conditioning system 10 further includes a first branch passage 171, one end of the first branch passage 171 is communicated with the first main passage 17, and the other end of the first branch passage 171 is communicated with the second main passage 18. The air conditioning system 10 further includes a second branch passage 172, one end of the second branch passage 172 communicates with the intermediate passage 153, and the other end of the second branch passage 172 communicates with the first main passage 17. And the position on the first bus passage 17 that communicates with the second branch passage 172 is located on the side of the first bus passage 17 that communicates with the first branch passage 171, which is close to the four-way valve 12. A portion of the first total via 17 between the first branch via 171 and the second branch via 172 is a switch via 173. And the first branch passage 171, the second branch passage 172 and the switching passage 173 can be selectively opened and closed.

In the heating dehumidification mode and the cooling dehumidification and heat regeneration mode, as shown in fig. 3 and 4, the first branch passage 171 and the second branch passage 172 are both in the off state, and the switching passage 173 is in the on state.

However, the air conditioning system 10 may also have a high-efficiency cooling mode, as shown in fig. 5, in which the switching path 173 is in a blocking state, the first branch path 171 and the second branch path 172 are both in a conducting state, the secondary throttling element 16 is in a fully open state, and the first heat exchanging element 151 and the second heat exchanging element 152 are connected in parallel. After passing through the four-way valve 12, the high-temperature refrigerant discharged from the discharge port of the compressor 11 first releases heat at the first heat exchange assembly 13, then is throttled by the main throttling element 14 and then is divided into two paths, one path absorbs heat through the first heat exchange member 151, and the other path absorbs heat through the second heat exchange member 152. The refrigerant having absorbed heat in the first heat exchange member 151 and the refrigerant having absorbed heat in the second heat exchange member 152 are collected in the first main passage 17 and then returned to the compressor 11.

Specifically, the selective on/off process of the first branch passage 171, the second branch passage 172, and the switching passage 173 may be implemented by providing a switch valve on each passage, or by communicating each passage through a multi-way valve, thereby controlling the conduction state of each nozzle of the multi-way valve.

For example, in one embodiment, as shown in fig. 1-5, one end of the second branch passage 172 communicates with the first gallery passage 17 through a first multi-way valve 174. When the second branch passage 172 needs to be communicated, as shown in fig. 2 and 5, in the high-efficiency heating mode and the high-efficiency cooling mode, the first multi-way valve 174 is switched to a state in which a water port of the first multi-way valve 174, which is communicated with the second branch passage 172, and a water port of the first multi-way valve 174, which is communicated with the first main passage 17, are communicated, so that the second branch passage 172 is communicated with the four-way valve 12. When the switching passage 173 needs to be opened, as shown in fig. 3 and 4, in the heating and dehumidifying mode and the cooling and dehumidifying and regenerating mode, the first multi-way valve 174 is switched to a state in which a water port of the first multi-way valve 174, which is communicated with the first main passage 17, and a water port of the first multi-way valve 174, which is communicated with the switching passage 173, are opened.

Optionally, in another embodiment, a second branch switch valve is disposed on the second branch passage 172, and a change-over switch valve is disposed on the change-over passage 173. And the on-off of the corresponding passage is controlled by two switching valves.

Similarly, in one embodiment, as shown in fig. 1 to 5, a first branch switch valve 1711 is disposed on the first branch passage 171. When the first branch passage 171 needs to be opened, as shown in fig. 2 and 5, the first branch switching valve 1711 is opened in the high-efficiency heating mode and the high-efficiency cooling mode. When it is required to block the first branch passage 171, as shown in fig. 3 and 4, the first branch switching valve 1711 is closed in the heating dehumidification mode and the cooling dehumidification regenerative mode.

Optionally, in another embodiment, the first branch switch valve 1711 communicates with the second main passage 18 through a second multi-way valve. The opening and closing of the first branch passage 171 are controlled by switching the conduction state between the ports of the second multi-way valve.

Further optionally, to implement the efficient cooling mode, in another embodiment, as shown in fig. 6, the air conditioning system 10 further includes a third branch passage 181, one end of the third branch passage 181 is communicated with the second main passage 18, and the other end of the third branch passage 181 is communicated with the intermediate passage 153. The air conditioning system 10 further includes a fourth branch passage 182, one end of the fourth branch passage 182 is connected to the first main passage 17, and the other end of the fourth branch passage 182 is connected to the intermediate passage 153. And the position of the intermediate passage 153 communicating with the fourth branch passage 182 is located on the side of the intermediate passage 153 communicating with the third branch passage 181 close to the second heat transfer element 152. The third branch passage 181 and the fourth branch passage 182 can be selectively opened and closed.

In the heating dehumidification mode and the cooling dehumidification regenerative mode, the third branch passage 181 and the fourth branch passage 182 are both in a cut-off state.

In the high-efficiency cooling mode, both the third branch passage 181 and the fourth branch passage 182 are in the on state, and the auxiliary throttle element 16 is in the off state, that is, the refrigerant cannot flow through the auxiliary throttle element 16. And the refrigerant throttled by the main throttling element 14 in the second main passage 18 can be divided into two paths, one path enters the first heat exchanging element 151 to absorb heat, and the other path enters the second heat exchanging element 152 to absorb heat. The refrigerant having absorbed heat in the first heat exchange member 151 and the refrigerant having absorbed heat in the second heat exchange member 152 are collected in the first main passage 17 and then returned to the compressor 11.

Similarly, the third branch passage 181 and the fourth branch passage 182 may be selectively opened and closed by providing a switch valve on the two branch passages, or by communicating the two branch passages with a corresponding main passage through a multi-way valve and controlling the communication state between the respective ports of the multi-way valve.

Specifically, in one embodiment, a third branch switch valve is disposed on the third branch passage 181.

Alternatively, in another embodiment, as shown in fig. 6, one end of the third branch passage 181 communicates with the second main passage 18 through a third multi-way valve 183.

More specifically, in one embodiment, as shown in FIG. 6, one end of the fourth branch passage 182 communicates with the first gallery 17 through a fourth multi-way valve 184.

Or optionally, in another embodiment, a fourth branch switch valve is disposed on the fourth branch passage 182.

More specifically, in one embodiment, the first heat exchange element 151 and the second heat exchange element 152 are each a heat exchanger. Two heat exchangers are connected in series to form the second heat exchange assembly 15.

Alternatively, in another embodiment, the first heat exchange element 151 and the second heat exchange element 152 are two heat exchange tubes connected in series in a heat exchanger. In other words, the second component is a heat exchanger, the first heat exchange element 151 is a section of heat exchange tube in the heat exchanger, and the second heat exchange element 152 is another section of heat exchange tube in the heat exchanger. But the auxiliary throttling element 16 is arranged on a passage which is connected between the two sections of heat exchange tubes in series.

Further, as shown in fig. 1 to 5, when the air conditioning system 10 includes the first branch passage 171 and the second branch passage 172. In the normal heating mode, the primary throttling element 14 is in a throttling state, and the secondary throttling element 16 is in a fully open state, so that the high-temperature refrigerant discharged from the discharge port of the compressor 11 passes through the first heat exchanger 151 and the second heat exchanger 152 in sequence to release heat. In other words, the ordinary heating mode differs from the heating and dehumidifying mode only in the state of the secondary throttling element 16.

Further, in one embodiment, as shown in fig. 1 to 5, the air conditioning system 10 further includes an air supply device 19, wherein the air supply device 19 is used for providing wind power, so that the air flow passes through the first heat exchanging element 151 and the second heat exchanging element 152 in sequence. In order to improve the heat exchange efficiency in the heating mode and realize efficient heating, it is necessary to ensure that the refrigerant flows through the second heat exchange member 152 and the first heat exchange member 151 in sequence in the heating mode, which is just opposite to the sequence of the airflow flowing through the first heat exchange member 151 and the second heat exchange member 152.

Based on this, as shown in fig. 1 and 2, the air conditioning system 10 further includes a heating branch passage 175, one end of the heating branch passage 175 is communicated with the second main passage 18, and the other end of the heating branch passage 175 is communicated with the intermediate passage 153. The heating branch passage 175 can be selectively opened and closed. The position of the second main passage 18 communicating with the heating branch passage 175 is located on the side of the second main passage 18 communicating with the first branch passage 171, which is away from the second heat exchanging element 152. The intermediate passage 153 is located on the side of the secondary throttling element 16 adjacent to the second heat exchange member 152 at a position communicating with the second branch passage 172. The intermediate passage 153 is located on the side of the secondary throttling element 16 close to the first heat exchanging element 151 at a position communicating with the heating branch passage 175.

In the high-efficiency heating mode, as shown in fig. 2, the heating branch passage 175 is in a conducting state, the first branch passage 171 is in a conducting state, the second branch passage 172 is in a conducting state, the sub throttling element 16 is in a closing state, and the switching passage 173 is in a blocking state. After passing through the four-way valve 12, the high-temperature refrigerant discharged from the discharge port of the compressor 11 first enters the second heat exchange member 152 to release heat, then enters the first heat exchange member 151 to release heat through the first branch passage 171, and the refrigerant after releasing heat in the first heat exchange member 151 enters the second main passage 18 through the heating branch passage 175. Finally, after being throttled by the main throttling element 14, the heat is absorbed at the first heat exchange assembly 13 and finally flows back to the compressor 11. In the process, the high-temperature refrigerant firstly passes through the second heat exchange part 152, and then passes through the first heat exchange part 151 in the reverse order of the passing order of the air flow, so that the heat exchange efficiency is improved.

The heating branch passage 175 is in a blocking state in the heating dehumidification mode as shown in fig. 3, the cooling dehumidification regenerative mode as shown in fig. 4, and the high-efficiency cooling mode as shown in fig. 5.

Specifically, as shown in fig. 1 and 2, the heating branch passage 175 communicates with the second main passage 18 through a fifth multi-way valve 176.

Further specifically, as shown in fig. 1 to 6, in an embodiment, the air supply device 19 includes a fan, an air outlet of the fan faces the first heat exchange member 151, and the second heat exchange member 152 is disposed on a side of the first heat exchange member 151 facing away from the fan.

More specifically, in one embodiment, the primary throttling element 14 and/or the secondary throttling element 16 may be an electronic expansion valve, a thermal expansion valve, a throttle valve, or other throttling device having a flow regulating function, and having three states of fully open, throttling, and closed.

Further, in yet another embodiment, an air conditioner is provided, including the air conditioning system 10 described above.

The air conditioner provided by the scheme mainly adopts the air conditioning system 10 in any embodiment, so that the indoor temperature can be kept at a relatively high temperature level in the dehumidification process, and the effect of little or no temperature reduction in dehumidification is achieved.

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 device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

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; can be mechanically or electrically connected; 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.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. An air conditioning system is characterized by comprising a compressor, a four-way valve, a first heat exchange assembly, a main throttling element and a second heat exchange assembly;

the second heat exchange assembly comprises a first heat exchange piece and a second heat exchange piece which are communicated with each other, and an auxiliary throttling element is arranged on a passage communicated between the first heat exchange piece and the second heat exchange piece;

two water ports of the four-way valve are respectively communicated with an air inlet and an air outlet of the compressor, the other water port of the four-way valve is communicated with a refrigerant port which is not communicated with the second heat exchange part on the first heat exchange part, and the other water port of the four-way valve, the first heat exchange assembly, the main throttling element and the refrigerant port which is not communicated with the first heat exchange part on the second heat exchange part are sequentially communicated.

2. The air conditioning system according to claim 1, wherein a refrigerant port of the first heat exchanger, which is not communicated with the second heat exchanger, is a first refrigerant port, a passage communicating between the first refrigerant port and a water port of the four-way valve is a first main passage, a refrigerant port of the second heat exchanger, which is not communicated with the first heat exchanger, is a second refrigerant port, a passage communicating between the second refrigerant port and the main throttling element is a second main passage, a passage communicating between the first heat exchanger and the second heat exchanger is an intermediate passage, and the auxiliary throttling element is provided on the intermediate passage.

3. The air conditioning system of claim 2, further comprising a first branch passage and a second branch passage, one end of the first branch passage is communicated with the first general passage, the other end of the first branch passage is communicated with the second general passage, one end of the second branch passage is communicated with the intermediate passage, the other end of the second branch passage is communicated with the first main passage, and the position of the first main passage communicated with the second branch passage is positioned at one side of the position of the first main passage communicated with the first branch passage, which is close to the four-way valve, the portion of the first total lane between the first branch lane and the second branch lane is a switch lane, and the first branch passage, the second branch passage and the switching passage can be selectively switched on and off.

4. The air conditioning system as claimed in claim 3, wherein one end of the second branch passage communicates with the first main passage through a first multi-way valve;

or a second branch switch valve is arranged on the second branch passage, and a change-over switch valve is arranged on the change-over passage.

5. The air conditioning system as claimed in claim 3, wherein a first branch switching valve is provided on the first branch passage;

or the first branch switch valve is communicated with the second main passage through a second multi-way valve.

6. The air conditioning system according to claim 2, further comprising a third branch passage and a fourth branch passage, the third branch passage communicating at one end with the second main passage, the third branch passage communicating at the other end with the intermediate passage, the fourth branch passage communicating at one end with the first main passage, the fourth branch passage communicating at the other end with the intermediate passage, and the intermediate passage communicating with the fourth branch passage at a position near the second heat exchanging element at a position on the intermediate passage communicating with the third branch passage, the third branch passage and the fourth branch passage being selectively openable and closable.

7. The air conditioning system of claim 6, wherein a third branch switch valve is provided on the third branch passage;

or one end of the third branch passage is communicated with the second main passage through a third multi-way valve.

8. The air conditioning system as claimed in claim 6, wherein one end of the fourth branch passage communicates with the first main passage through a fourth multi-way valve;

or a fourth branch switch valve is arranged on the fourth branch passage.

9. An air conditioning system according to any of claims 1 to 8, wherein the first heat exchange element and the second heat exchange element are each a heat exchanger;

or the first heat exchange piece and the second heat exchange piece are two sections of heat exchange tubes which are connected in series in one heat exchanger.

10. An air conditioner characterized by comprising the air conditioning system of any one of claims 1 to 9.

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