CN114111116A - Convertible heat exchange assembly, air conditioner, air conditioning system and control method of air conditioning system - Google Patents

Abstract

The invention relates to a convertible heat exchange assembly, an air conditioner, an air conditioning system and a control method thereof, wherein a first heat exchange piece and a second heat exchange piece are connected in series through an intermediate passage network to form two modes, one mode is a heat exchange assembly A, the other mode is a heat exchange assembly B, and then selective conduction between each branch port and a corresponding main port in a conversion passage network is combined, so that a refrigerant firstly passes through the second heat exchange piece and then passes through the first heat exchange piece under the action of an air supply device and the sequence of air flow passing through the first heat exchange piece and the second heat exchange piece is opposite under the action of the air supply device, and the heat exchange efficiency can be improved.

Description

Convertible heat exchange assembly, air conditioner, air conditioning system and control method of air conditioning system

Technical Field

The invention relates to the technical field of air conditioner heat exchange equipment, in particular to a convertible heat exchange assembly, an air conditioner, an air conditioning system and a control method thereof.

Background

Along with the development of the technical field of air-conditioning heat exchange equipment, the working conditions of the air-conditioning equipment are more and more diversified, such as efficient heating, refrigeration, dehumidification, heat return and the like. The high-efficiency heating mode refers to that the indoor heat exchanger is used as a condenser to increase the indoor temperature. The refrigeration, dehumidification and heat return means that part of heat in the refrigerant is utilized to stabilize the indoor temperature in the dehumidification process, so that the indoor temperature is prevented from being too low in the dehumidification process. In other words, in the process of refrigeration, dehumidification and heat return, the indoor heat exchanger is divided into two parts of heat exchange structures, one part of the heat exchange structure is used as a condenser to stabilize the indoor temperature, and the other part of the heat exchange structure is used as an evaporator to reduce the temperature and dehumidify. In the process of refrigeration, dehumidification and heat return, a refrigerant needs to pass through a heat exchange structure used as a condenser and then pass through a heat exchange structure used as an evaporator. If the high-efficiency heating and refrigerating and dehumidifying heat-returning functions are integrated in one air-conditioning system, the four-way valve in the air-conditioning system in the high-efficiency heating mode is generally switched to a state different from that in the refrigerating and dehumidifying heat-returning mode, the flow direction of a refrigerant is changed, the refrigerant firstly passes through a heat exchange structure used as an evaporator in the refrigerating and dehumidifying heat-returning mode and then passes through a heat exchange structure used as a condenser in the refrigerating and dehumidifying heat-returning mode, and the problem of low heat exchange efficiency exists.

Disclosure of Invention

The invention provides a convertible heat exchange assembly, an air conditioner, an air conditioning system and a control method thereof, aiming at the problem of low heat exchange efficiency in a high-efficiency heating mode in a system integrating high-efficiency heating, refrigerating, dehumidifying and heating functions, so that the heat exchange efficiency in the high-efficiency heating mode is improved.

A convertible heat exchange assembly comprising:

the first heat exchange piece is internally provided with a first channel for the circulation of a refrigerant;

the second heat exchange piece is internally provided with a second channel for the circulation of a refrigerant;

the middle passage network is configured to connect the first heat exchange piece and the second heat exchange piece in series to form an A heat exchange assembly in a high-efficiency heating mode, connect the first heat exchange piece and the second heat exchange piece in series to form a B heat exchange assembly in a cooling, dehumidifying and heat regenerating mode, a throttling element A is further arranged on a passage in the B heat exchange assembly, which is connected between the first heat exchange piece and the second heat exchange piece in series, and an inlet of the A heat exchange assembly and an inlet of the B heat exchange assembly are both formed on the second heat exchange piece;

the air supply device is used for providing wind power so that air flow blows through the first heat exchange piece and the second heat exchange piece in sequence;

the heat exchange system comprises a conversion passage network, wherein the conversion passage network is provided with a first total port, a second total port, a first branch port, a second branch port, a third branch port and a fourth branch port, the conversion passage network is configured in such a way that the first branch port and the second branch port can be selectively communicated with the first total port, the third branch port and the fourth branch port can be selectively communicated with the second total port, the first branch port is communicated with an inlet of the heat exchange assembly A, the third branch port is communicated with an outlet of the heat exchange assembly A, the second branch port is communicated with an outlet of the heat exchange assembly B, and the fourth branch port is communicated with an inlet of the heat exchange assembly B.

According to the scheme, the convertible heat exchange assembly is provided, no matter in a high-efficiency heating mode or in a refrigeration dehumidification heat return mode, a refrigerant flows through the second heat exchange piece and the first heat exchange piece in sequence, and wind power provided by the air supply device enables air flow to sequentially pass through the first heat exchange piece and the second heat exchange piece, so that the heat exchange efficiency in the high-efficiency heating mode is improved. Specifically, in the efficient heating mode, the first branch port is communicated with the first main port, and the third branch port is communicated with the second main port, so that the refrigerant enters from the inlet of the heat exchange assembly a. And in a refrigeration dehumidification regenerative mode, the second branch port is communicated with the first main port, and the fourth branch port is communicated with the second main port, so that a refrigerant enters from an inlet of the heat exchange assembly B. The inlet of the heat exchange component A and the inlet of the heat exchange component B are formed on the second heat exchange piece, so that no matter in a high-efficiency heating mode or a refrigeration dehumidification heat return mode, a refrigerant firstly passes through the second heat exchange piece and then passes through the first heat exchange piece, and the sequence of air flow flowing through the first heat exchange piece and the second heat exchange piece under the action of the air supply device is opposite, so that the heat exchange efficiency can be improved.

In one embodiment, the intermediate passage network comprises intermediate passages, the first heat exchange element and the second heat exchange element in the heat exchange assembly A and the heat exchange assembly B are connected in series by the intermediate passages, and the throttling element A is arranged on the intermediate passages.

In one embodiment, the intermediate passage network includes a first passage and a second passage, the first passage is connected in series between the first end of the first channel and the second end of the second channel to form the heat exchange assembly a, the first passage is selectively opened and closed, the second passage is connected in series between the second end of the first channel and the first end of the second channel to form the heat exchange assembly B, and the throttling element a is arranged on the second passage.

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

In one embodiment, the switch lane network includes a first total lane, a second total lane, a first branch lane, a second branch lane, a third branch lane, and a fourth branch lane;

one end opening of the first main passage is the first main port, one end of the first branch passage and one end of the second branch passage are both communicated with the other end opening of the first main passage, one end opening of the first branch passage far away from the first main passage is the first branch port, and one end opening of the second branch passage far away from the first main passage is the second branch port;

one end opening of the second main passage is the second main port, one end of the third branch passage and one end of the fourth branch passage are both communicated with the other end of the second main passage, one end opening of the third branch passage far away from the second main passage is the third branch port, and one end opening of the fourth branch passage far away from the second main passage is the fourth branch port.

In one embodiment, the switch path network further comprises a first multi-way valve, the first main path being in communication with the first branch path and the second branch path through the first multi-way valve;

and/or, the switching passage network further comprises a second multi-way valve, and the second main passage is communicated with the third branch passage and the fourth branch passage through the second multi-way valve;

and/or a first branch switch valve is arranged on the first branch passage, and a second branch switch valve is arranged on the second branch passage;

and/or a third branch switch valve is arranged on the third branch passage, and a fourth branch switch valve is arranged on the fourth branch passage.

In one embodiment, the air supply device comprises a fan, an air outlet of the fan faces the first heat exchange piece, and the second heat exchange piece is arranged on one side, away from the fan, of the first heat exchange piece.

An air conditioning system comprises the convertible heat exchange assembly.

According to the scheme, the convertible heat exchange assembly in any embodiment is adopted, so that the sequence of the refrigerant flowing through the first heat exchange piece and the second heat exchange piece is opposite to the sequence of the air flowing through the first heat exchange piece and the second heat exchange piece under the action of the air supply device no matter in a high-efficiency heating mode or a refrigeration, dehumidification and heat return mode, and therefore the heat exchange efficiency is improved.

In one embodiment, the air conditioning system further comprises a compressor, a first heat exchanger, a throttling element B and a four-way valve, 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 the first main port, and the other water port of the four-way valve, the first heat exchanger, the throttling element B and the second main port are sequentially communicated.

An air conditioner comprises the air conditioning system.

According to the scheme, the air conditioner adopts the air conditioning system in any one of the embodiments, so that the heat exchange efficiency in a high-efficiency heating mode can be effectively improved.

A control method of an air conditioning system is provided, and the air conditioning system is the air conditioning system, and the control method comprises the following steps:

acquiring a current working mode of the system;

if the current working mode is the high-efficiency heating mode, the first branch port is controlled to be communicated with the first main port, and the third branch port is controlled to be communicated with the second main port;

and if the current working mode is a refrigeration, dehumidification and heat regeneration mode, regulating and controlling the second branch port to be communicated with the first main port, and regulating the fourth branch port to be communicated with the second main port.

The scheme provides a control method of an air conditioning system, which is mainly used for controlling the air conditioning system, wherein the first heat exchange piece and the second heat exchange piece are connected in series to form the heat exchange assembly A in a high-efficiency heating mode, the first heat exchange piece and the second heat exchange piece are connected in series to form the heat exchange assembly B in a cooling, dehumidifying and backheating mode, and the sequence of refrigerant flowing through and the sequence of airflow flowing through can be ensured to be opposite in the two modes, so that the heat exchange efficiency is improved.

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 schematic view showing a relative position relationship among an air supply device, a first heat exchange member and a second heat exchange member in the convertible heat exchange assembly according to this embodiment;

FIG. 2 is a system diagram of an air conditioning system according to an embodiment;

FIG. 3 is a refrigerant flow diagram of the air conditioning system of FIG. 2 in a cooling mode;

FIG. 4 is a refrigerant flow diagram of the air conditioning system shown in FIG. 2 in a cooling, dehumidifying and backheating mode;

fig. 5 is a refrigerant flow diagram of the air conditioning system shown in fig. 2 in the efficient heating mode;

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

Description of reference numerals:

10. the heat exchange component can be changed; 11. a first heat exchange member; 111. a throttling element A; 12. a second heat exchange member; 121. a first on-off valve; 13. an intermediate passage; 14. a first path; 15. a second path; 16. an air supply device; 17. switching a path network; 171. a first bus path; 172. a second main path; 173. a first branch path; 1731. a first branch switching valve; 174. a second branch path; 1741. a second branch switching valve; 175. a third branch passage; 1751. a third branch switching valve; 176. a fourth branch path; 1761. a fourth branch switching valve; 20. an air conditioning system; 21. a compressor; 22. a first heat exchanger; 23. a throttling element B; 24. and a four-way valve.

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.

In one embodiment, there is provided a convertible heat exchange assembly 10, as shown in fig. 2-5, comprising:

the heat exchanger comprises a first heat exchange piece 11, wherein a first channel for the circulation of a refrigerant is arranged in the first heat exchange piece 11;

the second heat exchange part 12 is provided with a second channel for the circulation of a refrigerant in the second heat exchange part 12;

the intermediate passage network is configured to connect the first heat exchange element 11 and the second heat exchange element 12 in series to form an a heat exchange assembly as shown in fig. 5 in the high-efficiency heating mode, connect the first heat exchange element 11 and the second heat exchange element 12 in series to form a B heat exchange assembly as shown in fig. 4 in the cooling, dehumidifying and heat regenerating mode, a throttling element a111 is further arranged on a passage connected between the first heat exchange element 11 and the second heat exchange element 12 in series in the B heat exchange assembly, and an inlet of the a heat exchange assembly and an inlet of the B heat exchange assembly are both formed on the second heat exchange element 12;

an air supply device 16, as shown in fig. 1 to 5, the air supply device 16 being configured to provide wind force so that an air flow blows through the first heat exchange member 11 and the second heat exchange member 12 in sequence;

a switching path network 17, the switching path network 17 having a first total port, a second total port, a first branch port, a second branch port, a third branch port and a fourth branch port, the switching path network 17 being configured such that the first branch port and the second branch port can be selectively conducted with the first total port, and the third branch port and the fourth branch port can be selectively conducted with the second total port, the first branch port is communicated with the inlet of the heat exchange assembly a, the third branch port is communicated with the outlet of the heat exchange assembly a, the second branch port is communicated with the outlet of the heat exchange assembly B, and the fourth branch port is communicated with the inlet of the heat exchange assembly B.

According to the convertible heat exchange assembly 10 provided by the scheme, no matter in the efficient heating mode or in the refrigeration dehumidification heat return mode, the refrigerant sequentially flows through the second heat exchange piece 12 and the first heat exchange piece 11, and the wind power provided by the air supply device 16 enables the air flow to sequentially pass through the first heat exchange piece 11 and the second heat exchange piece 12, so that the heat exchange efficiency in the efficient heating mode is improved. Specifically, as shown in fig. 5, in the high-efficiency heating mode, the first branch port is communicated with the first total port, and the third branch port is communicated with the second total port, so that the refrigerant enters from the inlet of the heat exchange assembly a. As shown in fig. 4, in the cooling, dehumidifying and backheating mode, the second branch port is communicated with the first main port, and the fourth branch port is communicated with the second main port, so that the refrigerant enters from the inlet of the heat exchange assembly B. On the basis that the inlet of the heat exchange assembly A and the inlet of the heat exchange assembly B are formed on the second heat exchange part 12, no matter in a high-efficiency heating mode or a refrigeration and dehumidification heat return mode, a refrigerant firstly passes through the second heat exchange part 12 and then passes through the first heat exchange part 11, the sequence of the air flow flowing through the first heat exchange part 11 and the second heat exchange part 12 under the action of the air supply device 16 is opposite, and therefore the heat exchange efficiency can be improved.

Specifically, in some embodiments, as shown in fig. 6, the intermediate passage network includes an intermediate passage 13, the first heat exchange element 11 and the second heat exchange element 12 in the heat exchange assembly a and the heat exchange assembly B are connected in series by the intermediate passage 13, and the throttling element a111 is arranged on the intermediate passage 13. In other words, the inlet of the heat exchange assembly a and the inlet of the heat exchange assembly B are the same end of the same heat exchange element, for example, both the same end of the second channel. The first branch port and the fourth branch port are communicated with the same end of the second channel.

When the first heat exchanger 11 and the second heat exchanger 12 connected in series to the intermediate passage 13 are used as the heat exchange assembly a, the throttling element a111 is fully opened without throttling the refrigerant flowing through the intermediate passage 13. In other words, in the high-efficiency heating mode, the first heat exchanger 11 and the second heat exchanger 12 are connected in series, and both are used as a condenser.

When the first heat exchange member 11 and the second heat exchange member 12 connected in series by the intermediate passage 13 are used as the B heat exchange assembly, the throttling element a111 is in a throttling state. In the cooling dehumidification regenerative mode, the refrigerant with a higher temperature passes through the second heat exchange member 12 to release part of the heat, so that the indoor temperature is stabilized at a certain temperature. The refrigerant after heat release in the second heat exchanging element 12 is throttled by the throttling element a111 and enters the first heat exchanging element 11, and the refrigerant absorbs heat and dehumidifies in the first heat exchanging element 11.

Alternatively, in other embodiments, as shown in fig. 2-5, the intermediate path network includes a first path 14 and a second path 15. The first channel 14 is connected in series between the first end of the first channel and the second end of the second channel to form the A heat exchange assembly, and the first channel 14 can be selectively switched on and off. The second passage 15 is connected in series between the second end of the first passage and the first end of the second passage to form the heat exchange assembly B, and the throttling element a111 is arranged on the second passage 15.

When the high-efficiency heating mode is performed, as shown in fig. 5, the first passage 14 is open, the throttling element a111 in the second passage 15 is closed, and the second passage 15 is closed. The refrigerant enters the second channel from the first branch port, then enters the first channel through the first passage 14, and finally the refrigerant flowing out of the first channel enters the switching channel network 17 from the third branch port and flows to the second main port.

When in the cooling dehumidification regenerative mode, as shown in fig. 4, the first passage 14 is blocked, and the throttling element a111 of the second passage 15 is in a throttling state. The refrigerant enters the switching passage network 17 from the second main port, then reaches the fourth branch port, then enters the second passage, the refrigerant passing through the second passage flows into the second passage 15, the refrigerant enters the first passage after being throttled by the throttling element a111 on the second passage 15, finally the refrigerant flowing out of the first passage enters the switching passage network 17 again through the second branch port, and then is discharged from the first main port to the switching passage network 17.

Further, in some embodiments, as shown in FIG. 3, the convertible heat exchange assembly 10 can also be used in a cooling mode when the network of intermediate passageways includes the first passageways 14 and the second passageways 15. In the cooling mode, the first heat exchanging element 11 and the second heat exchanging element 12 are in a parallel state. Specifically, as shown in fig. 3, the first passage 14 is in a cut-off state, and the throttling element a111 on the second passage 15 is in a closed state, in other words, the second passage 15 is in a cut-off state.

Further, in some embodiments, the convertible heat exchange assembly 10 may also be used in a heating and dehumidification mode. Specifically, in the heating and dehumidifying mode, the first heat exchange element 11 is connected in series with the second heat exchange element 12, and a throttling element, such as the throttling element a, is arranged on a passage of the series connection. The first heat exchange member 11 and the second heat exchange member 12 are connected in series in the heating dehumidification mode to form a heat exchange assembly with a structure similar to that of the heat exchange assembly B in the cooling dehumidification and heat return mode.

Specifically, as shown in fig. 2, the convertible heat exchange assembly 10 may be adopted, a refrigerant entering the conversion passage network 17 from the first main port may enter the first heat exchange member 11 from the second branch port, flow through the first heat exchange member 11, then flow through the throttling element a111, and then enter the second heat exchange member 12, and a refrigerant discharged from the second heat exchange member 12 enters the conversion passage network 17 again from the fourth branch port.

As shown in fig. 6, the convertible heat exchange assembly 10 may also be adopted, a refrigerant entering the conversion passage network 17 from the first main port may enter the second heat exchange member 12 from the first branch port, flow through the second heat exchange member 12, then flow through the throttling element a111, and then flow into the first heat exchange member 11, and a refrigerant discharged from the first heat exchange member 11 enters the conversion passage network 17 from the third branch port; alternatively, the refrigerant entering the switching passage network 17 from the first main port may enter the first heat exchange member 11 from the second branch port, flow through the first heat exchange member 11, flow through the throttling element a111, and flow into the second heat exchange member 12, and the refrigerant discharged from the second heat exchange member 12 enters the switching passage network 17 again from the fourth branch port.

Further specifically, in one embodiment, a first on-off valve 121 is provided on the first passage 14. The first on-off valve 121 controls the first passage 14 to be opened or closed.

Optionally, in other embodiments, the first channel 14 may also communicate with the first end of the first channel and the second branch port through a multi-way valve, so that whether the first end of the first channel communicates with the first channel 14 or the second branch port can be selectively controlled by switching the state of the multi-way valve.

Similarly, the first passage 14 may communicate with the second end of the second channel and the fourth branch port through a multi-way valve.

Further, in some embodiments, as shown in fig. 2-6, the switch lane network 17 includes a first total lane 171, a second total lane 172, a first branch lane 173, a second branch lane 174, a third branch lane 175, and a fourth branch lane 176;

one end of the first main passage 171 is opened as the first main port, one end of the first branch passage 173 and one end of the second branch passage 174 are both opened and communicated with the other end of the first main passage 171, one end of the first branch passage 173 far away from the first main passage 171 is opened as the first branch port, and one end of the second branch passage 174 far away from the first main passage 171 is opened as the second branch port;

the one end opening of the second main passage 172 is the second main port, one end of the third branch passage 175 and one end of the fourth branch passage 176 are both communicated with the other end of the second main passage 172, the one end opening of the third branch passage 175 far away from the second main passage 172 is the third branch port, and the one end opening of the fourth branch passage 176 far away from the second main passage 172 is the fourth branch port.

It is understood that two branch passages, namely, the first branch passage 173 and the second branch passage 174, are communicated with the first main passage 171; two branch passages, namely, the third branch passage 175 and the fourth branch passage 176, communicate with the second main passage 172.

The on-off control process of each branch passage can be realized by arranging a switch valve on each branch passage, or each branch passage is communicated with the corresponding main passage by adopting a multi-way valve, so that the on-off control of each branch passage is realized by controlling the on-off state of each water gap of the multi-way valve.

For example, in one embodiment, the shift passage network 17 further includes a first multi-way valve through which the first total passage 171 communicates with the first branch passage 173 and the second branch passage 174. When the first branch port and the first main port need to be communicated, the first multi-way valve is switched to a state where two water ports, that is, a water port on the first multi-way valve communicated with the first main passage 171 and a water port on the first multi-way valve communicated with the first branch passage 173 are communicated. When it is necessary to communicate the second branch port with the first main port, the first multi-way valve is switched to a state in which two ports, that is, a port on the first multi-way valve that communicates with the first main passage 171 and a port on the first multi-way valve that communicates with the second branch passage 174, are communicated with each other.

Likewise, in one embodiment, the shift passage network 17 further includes a second multi-way valve through which the second main passage 172 communicates with the third branch passage 175 and the fourth branch passage 176.

Further optionally, in other embodiments, as shown in fig. 2 to 6, a first branch switch valve 1731 is disposed on the first branch passage 173, and a second branch switch valve 1741 is disposed on the second branch passage 174.

A third branch switch valve 1751 is arranged on the third branch passage 175, and a fourth branch switch valve 1761 is arranged on the fourth branch passage 176.

The on-off state of the corresponding branch passage is controlled by controlling the on-off states of the first branch switch valve 1731, the second branch switch valve 1741, the third branch switch valve 1751 and the fourth branch switch valve 1761.

In the high-efficiency heating mode, as shown in fig. 5, the first branch switch valve 1731 is opened, the second branch switch valve 1741 is closed, the third branch switch valve 1751 is opened, and the fourth branch switch valve 1761 is closed.

In the cooling dehumidification and heat regeneration mode, as shown in fig. 4, the first branch switch valve 1731 is closed, the second branch switch valve 1741 is opened, the third branch switch valve 1751 is closed, and the fourth branch switch valve 1761 is opened.

Further specifically, as shown in fig. 1 to 6, in one embodiment, the air supply device 16 includes a fan, an air outlet of the fan faces the first heat exchange element 11, and the second heat exchange element 12 is disposed on a side of the first heat exchange element 11 facing away from the fan. When the fan is started, the air blown out from the fan firstly passes through the first heat exchange piece 11 and then passes through the second heat exchange piece 12. In the efficient heating mode, the air flow firstly passes through the first heat exchange part 11 with a lower refrigerant temperature for heat exchange, at the moment, the indoor temperature exchanging heat with the first heat exchange part 11 has a certain difference with the refrigerant temperature in the first heat exchange part 11, and the temperature of the air flow rises after heat exchange. The air flow with the raised temperature passes through the second heat exchanging element 12, the temperature of the refrigerant in the second heat exchanging element 12 is higher than the temperature of the refrigerant in the first heat exchanging element 11, and at this time, the temperature of the air flow passing through the second heat exchanging element 12 is still lower than the temperature of the refrigerant in the second heat exchanging element 12 although the air flow passes through the first heat exchanging element in the earlier stage, so that the air flow can still normally perform the heat exchanging process at the second heat exchanging element 12. Thereby making the overall heat exchange efficiency higher.

Alternatively, the air supply device 16 may be other devices capable of providing power for air flow circulation, and is not limited in particular here.

Further, the first heat exchange element 11 and the second heat exchange element 12 described in this application may be two different heat exchangers, or may be two different heat exchange tube sections in the same heat exchanger.

Further, in yet another embodiment, as shown in fig. 2-6, an air conditioning system 20 is provided that includes the convertible heat exchange assembly 10 described above.

According to the air conditioning system 20 provided by the above scheme, by adopting the convertible heat exchange assembly 10 in any of the above embodiments, no matter in the high-efficiency heating mode or in the refrigeration, dehumidification and heat return mode, the sequence of the refrigerant flowing through the first heat exchange member 11 and the second heat exchange member 12 is opposite to the sequence of the airflow flowing through the first heat exchange member 11 and the second heat exchange member 12 under the action of the air supply device 16, so that the heat exchange efficiency is improved.

Further, as shown in fig. 2 to 6, in one embodiment, the air conditioning system 20 further includes a compressor 21, a first heat exchanger 22, a throttling element B23, and a four-way valve 24, two water ports of the four-way valve 24 are respectively communicated with an air inlet and an air outlet of the compressor 21, another water port of the four-way valve 24 is communicated with the first main port, and another water port of the four-way valve 24, the first heat exchanger 22, the throttling element B23, and the second main port are communicated in sequence.

In the high-efficiency heating mode, as shown in fig. 5, the four-way valve 24 is adjusted to allow the high-temperature refrigerant discharged from the discharge port of the compressor 21 to enter the second heat exchanging element 12 first and then enter the first heat exchanging element 11. The refrigerant after heat release at the second heat exchanging element 12 and the first heat exchanging element 11 returns to the throttling element B23 for throttling, enters the first heat exchanger 22 after throttling for heat exchange, and returns to the compressor 21 through the four-way valve 24.

In the cooling, dehumidifying and backheating mode, as shown in fig. 4, the four-way valve 24 is adjusted to allow the high-temperature refrigerant discharged from the discharge port of the compressor 21 to exchange heat with the first heat exchanger 22, at this time, the throttling element B23 is in a fully open state, the refrigerant enters the second heat exchanging element 12 without being throttled, the second heat exchanging element 12 releases heat to stabilize the indoor temperature within a certain range, and the indoor temperature is prevented from being too low in the dehumidifying process. The refrigerant passing through the second heat exchange member 12 is throttled by the throttling element a111 and enters the first heat exchange member 11 to absorb heat and dehumidify.

In a cooling mode, as shown in fig. 3, the four-way valve 24 is adjusted, so that a high-temperature refrigerant discharged from an exhaust port of the compressor 21 first passes through the first heat exchanger 22 to exchange heat, at this time, the throttling element B23 is in a throttling state, the refrigerant throttled by the throttling element B23 is divided into two paths, one path enters the first heat exchanging part 11, the other path enters the second heat exchanging part 12, and the two paths of refrigerants respectively absorb heat at the first heat exchanging part 11 and the second heat exchanging part 12 to cool and then flow back to the four-way valve 24, and finally enter the compressor 21.

In the heating and dehumidifying mode, the four-way valve 24 is adjusted, so that a high-temperature refrigerant discharged from an exhaust port of the compressor 21 firstly passes through the second heat exchange member 12 or the first heat exchange member 11 to be heated, then is throttled by the throttling element a111, enters one of the first heat exchange member 11 and the second heat exchange member 12 which has not passed through yet to be cooled and dehumidified, then is throttled by the throttling element B23, enters the first heat exchanger 22 to exchange heat, and finally flows back to the compressor 21.

Specifically, in some embodiments, the throttling element a111 and/or the throttling element B23 may be an electronic expansion valve, a thermal expansion valve, a throttle valve, or other throttling device with a flow regulation function, and may have three states of fully open, throttling, and closing.

Further, in yet another embodiment, an air conditioner is provided, comprising the air conditioning system 20 described above.

According to the air conditioner provided by the scheme, the air conditioning system 20 in any one of the embodiments is adopted, so that the heat exchange efficiency in a high-efficiency heating mode can be effectively improved.

Further, in an embodiment, there is provided a control method of an air conditioning system 20, where the air conditioning system 20 is the air conditioning system 20 described above, and the control method includes the following steps:

acquiring a current working mode of the system;

if the current working mode is the high-efficiency heating mode, the first branch port is controlled to be communicated with the first main port, and the third branch port is controlled to be communicated with the second main port;

and if the current working mode is a refrigeration, dehumidification and heat regeneration mode, regulating and controlling the second branch port to be communicated with the first main port, and regulating the fourth branch port to be communicated with the second main port.

The control method of the air conditioning system 20 provided by the above scheme is mainly used for controlling the air conditioning system 20 described in the foregoing, the first heat exchange member 11 and the second heat exchange member 12 are connected in series to form the heat exchange assembly a in the high-efficiency heating mode, the first heat exchange member 11 and the second heat exchange member 12 are connected in series to form the heat exchange assembly B in the cooling, dehumidifying and backheating mode, and the sequence of refrigerant flowing through can be ensured to be opposite to the sequence of airflow flowing through in the two modes, so that the heat exchange efficiency is improved.

Further, in one embodiment, as shown in fig. 5, when the intermediate path network includes the first path 14 and the second path 15. If the current working mode is a high-efficiency heating film mode, the control method further comprises the following steps:

the throttling element a111 is regulated to be in a closed state, and the first switching valve 121 is regulated to be in an open state.

Further, in another embodiment, as shown in fig. 6, when the intermediate path network includes the intermediate paths 13. If the current working mode is a high-efficiency heating film mode, the control method further comprises the following steps:

the throttling element A111 is regulated and controlled to be in a full-open state.

Further, in one embodiment, as shown in fig. 4, when the intermediate path network includes the first path 14 and the second path 15. If the current working mode is a refrigeration, dehumidification and heat return mode, the control method further comprises the following steps:

the throttling element a111 is regulated to be in a throttling state, and the first switching valve 121 is in a closed state.

Further, in one embodiment, as shown in fig. 6, when the network of intermediate lanes includes the intermediate lanes 13. If the current working mode is a refrigeration, dehumidification and heat return mode, the control method further comprises the following steps:

the throttling element a111 is regulated to be in a throttling state.

Further, in one embodiment, the control method further comprises the steps of:

if the current operating mode is the high-efficiency heating mode, as shown in fig. 5, the throttling element B23 is regulated and controlled to be in a throttling state, and the four-way valve 24 is in a state where two water ports, namely a water port on the four-way valve 24, which is communicated with the first main port, and a water port on the four-way valve 24, which is communicated with the exhaust port of the compressor 21, are communicated.

Further, in one embodiment, the control method further comprises the steps of:

if the current operating mode is the cooling, dehumidifying and backheating mode, as shown in fig. 4, the throttling element B23 is regulated to be in a fully open state, and the four-way valve 24 is in a state where two water ports, namely, a water port on the four-way valve 24, which is communicated with the first heat exchanger 22, and a water port on the four-way valve 24, which is communicated with the exhaust port of the compressor 21, are communicated.

Specifically, in an embodiment, as shown in fig. 5 and 6, if the current operating mode is the high-efficiency heating mode, the controlling the first branch port to communicate with the first main port, and the communicating the third branch port with the second main port specifically includes the following steps:

if the current working mode is the high-efficiency heating mode, the first branch switch valve 1731 is controlled to be opened, the second branch switch valve 1741 is controlled to be closed, and the third branch switch valve 1751 is controlled to be opened and the fourth branch switch valve 1761 is controlled to be closed.

Further specifically, in an embodiment, as shown in fig. 4 and fig. 6, if the current operating mode is a cooling, dehumidifying and regenerative mode, the adjusting and controlling the second branch port to communicate with the first main port, and the communicating the fourth branch port with the second main port specifically includes the following steps:

if the current working mode is the refrigeration dehumidification regenerative mode, the second branch switch valve 1741 is controlled to be opened, the first branch switch valve 1731 is closed, the fourth branch switch valve 1761 is opened, and the third branch switch valve 1751 is closed.

Further, in one embodiment, as shown in fig. 3, the control method further includes the steps of:

and if the current working mode is a refrigeration mode, regulating and controlling the first branch port and the second branch port to be communicated with the first main port, and regulating the third branch port and the fourth branch port to be communicated with the second main port.

Specifically, if the current operating mode is the cooling mode, the controlling of the first branch port and the second branch port to be conducted with the first total port includes the following steps:

if the current working mode is the cooling mode, the first branch switch valve 1731, the second branch switch valve 1741, the third branch switch valve 1751, and the fourth branch switch valve 1761 are all controlled to be in an open state.

Further, in an embodiment, as shown in fig. 3, the intermediate passage network includes a first passage 14 and a second passage 15, the first passage 14 is connected in series between a first end of the first channel and a second end of the second channel to form the heat exchange assembly a, the first passage 14 is selectively opened and closed, the second passage 15 is connected in series between a second end of the first channel and a first end of the second channel to form the heat exchange assembly B, and the second passage 15 is provided with the throttling element a 111. If the current working mode is the refrigeration mode, the control method further comprises the following steps:

the throttling element a111 is regulated in a closed state, and the first switching valve 121 is regulated in a closed state.

Further, in an embodiment, as shown in fig. 3, if the current operation mode is the cooling mode, the control method further includes the following steps:

the throttle element B23 is controlled to be in a throttle state, and the four-way valve 24 is in a state where two water ports, that is, a water port of the four-way valve 24 communicating with the first heat exchanger 22 and a water port of the four-way valve 24 communicating with the discharge port of the compressor 21, are communicated.

Further, in one embodiment, as shown in fig. 2, the intermediate path network includes the first path 14 and the second path 15. The control method further comprises the following steps:

if the current working mode is a heating and dehumidifying mode, the second branch port is controlled to be communicated with the first main port, and the fourth branch port is controlled to be communicated with the second main port; the throttling element a111 is in a throttling state, the first switching valve 121 is in a closed state,

similarly, specifically, if the current operating mode is a heating and dehumidifying mode, the communication between the second branch port and the first main port is controlled, and the communication between the fourth branch port and the second main port specifically includes the following steps:

if the current working mode is the heating and dehumidifying mode, the second branch switch valve 1741 is controlled to be in the open state, the first branch switch valve 1731 is in the closed state, the fourth branch switch valve 1761 is in the open state, and the third branch switch valve 1751 is in the closed state.

Further, in one embodiment, as shown in fig. 6, the network of intermediate lanes includes the intermediate lanes 13. The control method further comprises the following steps:

if the current working mode is a heating and dehumidifying mode, the throttling element a111 is regulated and controlled to be in a throttling state, the throttling element B23 is regulated and controlled to be in a throttling state, and the four-way valve 24 is in a state that two water ports, namely a water port on the four-way valve 24, which is communicated with the first main port and a water port on the four-way valve 24, which is communicated with the exhaust port of the compressor 21 are communicated;

and the first branch switch valve 1731 is in an open state, the second branch switch valve 1741 is in a closed state, the third branch switch valve 1751 is in an open state, and the fourth branch switch valve 1761 is in a closed state; alternatively, the second branch switch valve 1741 is in an open state, the first branch switch valve 1731 is in a closed state, the fourth branch switch valve 1761 is in an open state, and the third branch switch valve 1751 is in a closed state.

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 (11)

1. A convertible heat exchange assembly, comprising:

the first heat exchange piece is internally provided with a first channel for the circulation of a refrigerant;

the second heat exchange piece is internally provided with a second channel for the circulation of a refrigerant;

the middle passage network is configured to connect the first heat exchange piece and the second heat exchange piece in series to form an A heat exchange assembly in a high-efficiency heating mode, connect the first heat exchange piece and the second heat exchange piece in series to form a B heat exchange assembly in a cooling, dehumidifying and heat regenerating mode, a throttling element A is further arranged on a passage in the B heat exchange assembly, which is connected between the first heat exchange piece and the second heat exchange piece in series, and an inlet of the A heat exchange assembly and an inlet of the B heat exchange assembly are both formed on the second heat exchange piece;

the air supply device is used for providing wind power so that air flow blows through the first heat exchange piece and the second heat exchange piece in sequence;

the heat exchange system comprises a conversion passage network, wherein the conversion passage network is provided with a first total port, a second total port, a first branch port, a second branch port, a third branch port and a fourth branch port, the conversion passage network is configured in such a way that the first branch port and the second branch port can be selectively communicated with the first total port, the third branch port and the fourth branch port can be selectively communicated with the second total port, the first branch port is communicated with an inlet of the heat exchange assembly A, the third branch port is communicated with an outlet of the heat exchange assembly A, the second branch port is communicated with an outlet of the heat exchange assembly B, and the fourth branch port is communicated with an inlet of the heat exchange assembly B.

2. The transformable heat exchange assembly of claim 1 wherein the network of intermediate passages comprises intermediate passages, the first and second heat exchange members of the heat exchange assemblies a and B are connected in series by the intermediate passages, and the intermediate passages are provided with the throttling elements a.

3. The convertible heat exchange assembly of claim 1, wherein the network of intermediate passages comprises a first passage and a second passage, the first passage being selectively openable and closable in series between a first end of the first channel and a second end of the second channel, the second passage being selectively openable and closable in series between the second end of the first channel and the first end of the second channel to form the heat exchange assembly B, the second passage having the throttling element a disposed thereon.

4. A convertible heat exchange assembly according to claim 3 wherein a first on-off valve is disposed on the first passage.

5. The convertible heat exchange assembly of any of claims 1 to 4, wherein the network of switch paths comprises a first total path, a second total path, a first branch path, a second branch path, a third branch path, and a fourth branch path;

one end opening of the first main passage is the first main port, one end of the first branch passage and one end of the second branch passage are both communicated with the other end opening of the first main passage, one end opening of the first branch passage far away from the first main passage is the first branch port, and one end opening of the second branch passage far away from the first main passage is the second branch port;

one end opening of the second main passage is the second main port, one end of the third branch passage and one end of the fourth branch passage are both communicated with the other end of the second main passage, one end opening of the third branch passage far away from the second main passage is the third branch port, and one end opening of the fourth branch passage far away from the second main passage is the fourth branch port.

6. The convertible heat exchange assembly of claim 5, wherein the network of switch passages further comprises a first multi-way valve, the first main passage communicating with the first branch passage and the second branch passage through the first multi-way valve;

and/or, the switching passage network further comprises a second multi-way valve, and the second main passage is communicated with the third branch passage and the fourth branch passage through the second multi-way valve;

and/or a first branch switch valve is arranged on the first branch passage, and a second branch switch valve is arranged on the second branch passage;

and/or a third branch switch valve is arranged on the third branch passage, and a fourth branch switch valve is arranged on the fourth branch passage.

7. A convertible heat exchange assembly as claimed in any of claims 1 to 4 wherein the air supply means comprises a fan having an air outlet facing the first heat exchange element, the second heat exchange element being disposed on a side of the first heat exchange element facing away from the fan.

8. An air conditioning system comprising the convertible heat exchange assembly of any of claims 1 to 7.

9. The air conditioning system of claim 8, further comprising a compressor, a first heat exchanger, a throttling element B, and a four-way valve, two of the water ports of the four-way valve being in communication with the air inlet and the air outlet of the compressor, respectively, the other water port of the four-way valve being in communication with the first header port, and the other water port of the four-way valve, the first heat exchanger, the throttling element B, and the second header port being in communication in sequence.

10. An air conditioner characterized by comprising the air conditioning system of claim 8 or 9.

11. A control method of an air conditioning system, characterized in that the air conditioning system is the air conditioning system of claim 8 or 9, the control method comprising the steps of:

acquiring a current working mode of the system;

if the current working mode is the high-efficiency heating mode, the first branch port is controlled to be communicated with the first main port, and the third branch port is controlled to be communicated with the second main port;

and if the current working mode is a refrigeration, dehumidification and heat regeneration mode, regulating and controlling the second branch port to be communicated with the first main port, and regulating the fourth branch port to be communicated with the second main port.

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