CN219913296U - Air conditioning system - Google Patents

Abstract

The utility model proposes an air conditioning system comprising: a first heat exchange portion having a refrigerant tube first end and a second end; a second heat exchange portion having a third end and a fourth end of the refrigerant tube; the second expansion valve is connected to the flow path between the second end of the refrigerant pipe and the third end of the refrigerant pipe; the compressor is in communication with the first heat exchange tube as the refrigerant flows along the first refrigerant path; the first heat exchange tube is communicated with a first end of the refrigerant tube through a first expansion valve, a second end of the refrigerant tube is communicated with a third end of the refrigerant tube through a second expansion valve, and a fourth end of the refrigerant tube is communicated with the compressor; the compressor is in communication with the first heat exchange tube as the refrigerant flows along the second refrigerant path; the first heat exchange tube is communicated with the fourth end of the refrigerant tube through the first expansion valve, the third end of the refrigerant tube is communicated with the second end of the refrigerant tube through the second expansion valve, the first end of the refrigerant tube is communicated with the compressor through the four-way valve, and the first heat exchange portion and the second heat exchange portion can be defrosted alternately to realize continuous heating.

Description

Air conditioning system

Technical Field

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

Background

At present, heat pump air conditioners are generally adopted in areas without central heating, but more problems are usually encountered when the heat pump air conditioners are adopted for heating, wherein the heat feeling of wind heating is worse than that of ground heating, the defrosting process is often accompanied with the problems of heating interruption, impact noise generated by refrigerant reversing and the like, some users choose to adopt a solar-to-ground water air conditioning system, namely the air conditioning system comprises an indoor heat exchanger and a radiating water pipe, the radiating water pipe is arranged below a bottom plate, the indoor heat exchanger flows with refrigerant, water exchanging heat with the refrigerant flows in the radiating pipe, the indoor heat exchanger can be operated when refrigerating, and the heat exchanging water pipe can be operated when heating, but noise is also generated at the indoor heat exchanger of the solar-to-ground water air conditioning system, so that the user experience is influenced, in addition, the defrosting process can be interrupted, the indoor temperature is seriously influenced, and bad experience is brought to users.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent.

To this end, according to an embodiment of the present disclosure, there is provided an air conditioning system including:

a compressor;

the four-way valve is connected with the compressor;

a water tank;

the first heat exchange tube is arranged in the water tank, and one end of the first heat exchange tube is connected with the four-way valve;

the two ends of the radiating pipe are respectively communicated with the water tank;

the first expansion valve is connected with the other end of the first heat exchange tube;

a second expansion valve;

an outdoor heat exchanger;

a first refrigerant path and a second refrigerant path;

the outdoor heat exchanger includes:

a first heat exchange portion having a refrigerant tube first end and a refrigerant tube second end;

a second heat exchange portion having a refrigerant tube third end and a refrigerant tube fourth end;

the second end of the refrigerant pipe is connected with the third end of the refrigerant pipe, and the second expansion valve is connected to a flow path between the second end of the refrigerant pipe and the third end of the refrigerant pipe;

the compressor communicates with the first heat exchange tube through the four-way valve when refrigerant flows along a first refrigerant path; the first heat exchange tube is communicated with the first end of the refrigerant tube through the first expansion valve, the second end of the refrigerant tube is communicated with the third end of the refrigerant tube through the second expansion valve, and the fourth end of the refrigerant tube is communicated with the compressor through the four-way valve;

The compressor communicates with the first heat exchange tube through the four-way valve when refrigerant flows along a second refrigerant path; the first heat exchange tube is communicated with the fourth end of the refrigerant tube through the first expansion valve, the third end of the refrigerant tube is communicated with the second end of the refrigerant tube through the second expansion valve, and the first end of the refrigerant tube is communicated with the compressor through the four-way valve.

The first refrigerant path and the second refrigerant path are arranged, so that the refrigerant can flow along the first refrigerant path and be switched along the second refrigerant path, the first heat exchange part and the second heat exchange part can be defrosted alternately, meanwhile, the heat dissipation pipe can continuously heat the indoor space and the four-way valve is not commutated, continuous heating can be realized, and the problems of indoor side temperature fluctuation and refrigerant impact noise caused by the commutation of the four-way valve are effectively solved.

According to an embodiment of the present disclosure, further comprising:

the second interface of the first reversing piece is connected with the first end of the refrigerant pipe;

the first connector of the second reversing piece is connected with one end, far away from the first heat exchange pipe, of the first expansion valve, the third connector of the second reversing piece is connected with the first connector of the first reversing piece, and the second connector of the second reversing piece is connected with a pipeline between the second end of the refrigerant pipe and the second expansion valve;

The third port of the third reversing piece is connected with the fourth end of the refrigerant pipe, and the first port of the third reversing piece is connected with a pipeline between the second reversing piece and the first expansion valve;

the third interface of the fourth reversing piece is connected with the third interface of the first reversing piece, the first interface of the fourth reversing piece is connected with the second interface of the third reversing piece, and the second interface of the fourth reversing piece is connected with the four-way valve.

The flow path of the refrigerant can be changed by the communication mode of the first reversing piece, the second reversing piece, the third reversing piece and the fourth reversing piece, so that the first refrigerant path and the second refrigerant path can be formed

According to an embodiment of the present disclosure, further comprising:

an indoor heat exchanger;

a third expansion valve;

one end of the indoor heat exchanger is connected with the four-way valve, the third expansion valve is connected with the indoor heat exchanger in series and is connected with the outdoor heat exchanger, and a refrigerant flow path where the indoor heat exchanger and the third expansion valve are positioned is connected with a refrigerant flow path where the first expansion valve and the first heat exchange tube are positioned in parallel;

the third expansion valve is isolated from the outdoor heat exchanger as refrigerant flows along the first refrigerant path and the second refrigerant path;

The indoor heat exchanger and the third expansion valve are arranged, so that the refrigerating and the heating of the radiating pipe of the indoor heat exchanger can be realized, and the user experience is improved.

According to the embodiment of the disclosure, the indoor heat exchangers are provided with a plurality of indoor heat exchangers which are arranged in parallel and connected with the four-way valve, one side, far away from the four-way valve, of each indoor heat exchanger is connected with a third expansion valve, one end of each third expansion valve is connected with the indoor heat exchanger, and the other end of each third expansion valve is connected with the outdoor heat exchanger.

According to an embodiment of the present disclosure, further comprising:

the valve box is internally provided with the third expansion valve, so that the third expansion valve can be uniformly managed and can be protected.

According to the embodiment of the disclosure, the first heat exchange part is located above the second heat exchange part, a water pan is arranged between the first heat exchange part and the second heat exchange part, so that water generated by defrosting the first heat exchange part is prevented from aggravating frosting or icing of the second heat exchange part, and partition defrosting is effectively ensured.

According to an embodiment of the present disclosure, further comprising:

the electromagnetic valves are connected to a flow path parallel to the flow path where the first heat exchange pipe is located, are arranged on one side, far away from the indoor heat exchanger, of the third expansion valves and are connected with the plurality of third expansion valves, and are capable of communicating or isolating the outdoor heat exchanger with the third expansion valves;

The one-way valve is connected to a flow path parallel to the flow path where the first heat exchange tube is located, the inlet end of the one-way valve is connected with one end, far away from the third expansion valve, of the indoor heat exchanger, the outlet end of the one-way valve is connected with the four-way valve, and the one-way valve is arranged to limit the flow direction of the refrigerant.

According to an embodiment of the present disclosure, further comprising:

the first stop valve is connected to one side of the electromagnetic valve, which is close to the third expansion valves, and the first stop valve is connected with the third expansion valves through pipelines;

the first air side needle valve is connected to one side of the one-way valve, which is close to the indoor heat exchangers, and the first air side needle valve is connected with a plurality of indoor heat exchangers through pipelines;

the first stop valve and the first air side needle valve are arranged, so that the air conditioning system is convenient to assemble, and refrigerant leakage is avoided.

According to an embodiment of the present disclosure, further comprising:

the second stop valve is connected between the first expansion valve and the first heat exchange pipe;

the second air side needle valve is connected to a flow path parallel to the indoor heat exchanger and connected in series with the first heat exchange tube, and the second air side needle valve is positioned at one side of the first heat exchange tube close to the four-way valve;

The second stop valve and the second air side needle valve are arranged, so that the air conditioning system is convenient to assemble, and refrigerant leakage is avoided.

According to an embodiment of the present disclosure, further comprising:

the first defrosting sensor is arranged on the first heat exchange part and is used for detecting the temperature of the first heat exchange part;

and the second defrosting sensor is arranged on the second heat exchange part and used for detecting the temperature of the second heat exchange part.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an air conditioning system according to an embodiment of the present utility model;

FIG. 2 is a partial schematic diagram of an air conditioning system according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a three-way valve according to an embodiment of the present utility model;

fig. 4 is a refrigerant flow diagram of an air conditioning system defrosting a first heat exchanging part according to an embodiment of the present utility model;

Fig. 5 is a refrigerant flow diagram of an air conditioning system defrosting a second heat exchanging part according to an embodiment of the present application;

FIG. 6 is another schematic diagram of an air conditioning system according to an embodiment of the present application;

fig. 7 is a refrigerant flow diagram when an air conditioning system according to an embodiment of the present application is cooling;

fig. 8 is a refrigerant flow diagram when an air conditioning system heats according to an embodiment of the present application;

fig. 9 is another refrigerant flow diagram of an air conditioning system defrosting a first heat exchanging part according to an embodiment of the present application;

fig. 10 is another refrigerant flow diagram of an air conditioning system defrosting a second heat exchanging part according to an embodiment of the present application;

FIG. 11 is a partial flow chart of defrosting an air conditioning system according to an embodiment of the application;

FIG. 12 is another partial flow diagram of an air conditioning system defrost according to an embodiment of the present application;

fig. 13 is a partial structural view of an air conditioning system according to an embodiment of the present application.

In the above figures: an air conditioning system 100; an outdoor fan 12; an outdoor heat exchanger 13; a first heat exchanging part 131; a refrigerant tube first end 13111; refrigerant tube second end 13112; a second heat exchanging part 132; a refrigerant tube third end 13211; a refrigerant tube fourth end 13212; a compressor 14; a first heat exchange tube 21; a water tank 22; a radiating pipe 23; a four-way valve 31; a four-way valve first port 311; a four-way valve second port 312; a four-way valve third port 313; a four-way valve fourth port 314; a first expansion valve 32; a second expansion valve 33; a first reversing element 34; a second reversing element 35; a third reversing element 36; a fourth reversing element 37; a three-way valve first port 381; a three-way valve second port 382; a three-way valve third interface 383; an indoor heat exchanger 41; a third expansion valve 51; a valve box 52; a solenoid valve 61; a one-way valve 62; a first shut-off valve 63; a first air side needle valve 64; a second shut-off valve 65; a second air side needle valve 66; a first defrost sensor 67; a second defrost sensor 68; an outlet air temperature sensor 69; a water receiving tray 71.

Detailed Description

The present utility model will be specifically described below by way of exemplary embodiments. It is to be understood that elements, structures, and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

The present utility model proposes an air conditioning system 100, which is described below with reference to fig. 1 to 13.

The air conditioning system 100 includes an outdoor unit and a first indoor portion.

The outdoor unit comprises an outdoor machine shell. The outdoor machine shell is provided with an outdoor air inlet and an outdoor air outlet, an outdoor air channel is arranged in the outdoor machine shell, and the outdoor air inlet and the outdoor air outlet are communicated with the outdoor air channel.

The outdoor unit further comprises an outdoor fan 12 and an outdoor heat exchanger 13, wherein the outdoor fan 12 and the outdoor heat exchanger 13 are arranged in the outdoor machine shell and are positioned in the outdoor air duct. The outdoor heat exchanger is located outdoor air intake department and is located the inboard of outdoor air intake, and the outdoor heat exchanger is used for carrying out the heat transfer with the air that gets into in the outdoor wind channel, and outdoor fan locates outdoor heat exchanger and is close to one side of outdoor air outlet, and outdoor fan is used for providing power for the flow of air, under outdoor fan's drive, and outdoor air enters into in the outdoor wind channel through outdoor air intake, and the air that enters into in the outdoor wind channel carries out the heat transfer with outdoor heat exchanger in outdoor heat exchanger department, and the air after the heat transfer flows out the outdoor wind channel through outdoor air outlet.

Referring to fig. 1, the air conditioning system 100 further includes a compressor 14, wherein the compressor 14 is disposed in the outdoor housing, and compresses refrigerant gas in a low temperature and low pressure state to discharge refrigerant gas in a high temperature and high pressure state.

The air conditioning system 100 further includes a four-way valve 31, and the four-way valve 31 is connected to the compressor. The inlet and the outlet of the compressor are connected with the four-way valve, specifically, the compressor is provided with a compressor inlet and a compressor outlet, the four-way valve is provided with a four-way valve first port 311 and a four-way valve second port 312, the compressor outlet is connected with the four-way valve first port, and the compressor inlet is connected with the four-way valve second port.

Referring to fig. 4, the four-way valve further has a four-way valve third port 313 and a four-way valve fourth port 314. The flow direction of the refrigerant is switched by the user of the four-way valve, so that the third port of the four-way valve is communicated with the first port of the four-way valve and the fourth port of the four-way valve is communicated with the second port of the four-way valve, or the third port of the four-way valve is communicated with the second port of the four-way valve and the fourth port of the four-way valve is communicated with the first port of the four-way valve, the indoor part can be refrigerated or heated by changing the flow direction of the refrigerant, and the requirements of the user are met.

The first indoor part includes a first heat exchange pipe 21, a water tank 22, and a radiating pipe 23.

One end of the first heat exchange tube is connected to the four-way valve, specifically, one end of the first heat exchange tube 21 is connected to the third port 313 of the four-way valve. The first heat exchange tube 21 is disposed in the water tank 22, wherein the first heat exchange tube may be partially disposed in the water tank or entirely disposed in the water tank. The first heat exchange tube 21 may be a coil tube arranged in a spiral.

Both ends of the radiating pipe 23 are respectively communicated with the water tank. The water tank can be internally provided with water, the water in the water tank can exchange heat with the refrigerant in the first heat exchange tube, the water in the water tank can flow into the radiating tube, the radiating tube can be the floor heating tube arranged indoors, the water which exchanges heat with the refrigerant in the first heat exchange tube can flow into the radiating tube to radiate indoors, when the first heat exchange tube releases heat, the water in the water tank can absorb heat, and the absorbed water can radiate indoors through the radiating tube, so that the first indoor part can perform the heating function.

The first indoor portion may further include a first power device (not shown), wherein water flowing into the heat-dissipating tube through the water tank exchanges heat with the first heat-dissipating tube, and water flowing into the water tank through the heat-dissipating tube exchanges heat with the first heat-dissipating tube, so that water in the water tank and the heat-dissipating tube can circulate, and the first power device may drive water circulation to form, wherein the first power device may be disposed in the water tank, or the first power device may be disposed outside the water tank and on the heat-dissipating tube, and the position and structure of the first power device may not be specifically limited as long as the water circulation can be normally formed by providing power for the flow of water.

The air conditioning system 100 further includes an expansion valve that expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The expansion valve comprises a first expansion valve 32 and a second expansion valve 33. Wherein the first expansion valve 32 is connected to the other end of the first heat exchange tube.

Referring to fig. 2, the outdoor heat exchanger 13 includes a first heat exchanging portion 131 and a second heat exchanging portion 132. Wherein the first heat exchange portion has a first refrigerant tube having a refrigerant tube first end 13111 and a refrigerant tube second end 13112. The second heat exchanging portion 132 has a second refrigerant tube having a refrigerant tube third end 13211 and a refrigerant tube fourth end 13212.

The refrigerant pipe third end 13211 is connected to the refrigerant pipe second end 13212, and the second expansion valve 32 is connected to a flow path between the refrigerant pipe second end 13212 and the refrigerant pipe third end 13211.

The air conditioning system includes a first refrigerant path and a second refrigerant path.

Wherein, referring to fig. 4, when the refrigerant flows along the first refrigerant path, the compressor is communicated with the first heat exchange tube through the four-way valve, the first heat exchange tube is communicated with the first end of the refrigerant tube through the first expansion valve, the second end of the refrigerant tube is communicated with the third end of the refrigerant tube through the second expansion valve, and the fourth end of the refrigerant tube is communicated with the compressor through the four-way valve.

Referring to fig. 5, when the refrigerant flows along the second refrigerant path, the compressor communicates with the first heat exchange tube through the four-way valve; the first heat exchange tube is communicated with the fourth end of the refrigerant tube through the first expansion valve, the third end of the refrigerant tube is communicated with the second end of the refrigerant tube through the second expansion valve, and the first end of the refrigerant tube is communicated with the compressor through the four-way valve.

Specifically, when the refrigerant flows along the first refrigerant path, the outlet of the compressor is communicated with the first port of the four-way valve, the four-way valve is switched to be communicated with the first port of the four-way valve and the third port of the four-way valve, the third port of the four-way valve is communicated with the first heat exchange tube, the first heat exchange tube is communicated with the first end of the refrigerant tube through the first expansion valve, the second end of the refrigerant tube is communicated with the third end of the refrigerant tube through the second expansion valve, the fourth end of the refrigerant tube is communicated with the fourth port of the four-way valve, the fourth port of the four-way valve is communicated with the second port of the four-way valve, and the second port of the four-way valve is communicated with the inlet of the compressor; the refrigerant flows out of the compressor through the compressor outlet, then flows through the four-way valve, the first heat exchange tube, the first expansion valve, the first heat exchange part, the second expansion valve, the second heat exchange part and the four-way valve in sequence, and then flows back to the compressor through the compressor inlet.

When the refrigerant flows along the first refrigerant path, the first expansion valve can be enabled to not perform a throttling function, the second expansion valve can be enabled to perform throttling, the first heat exchange portion is enabled to be a condenser, the second heat exchange portion is enabled to be an evaporator, the first heat exchange portion can be enabled to defrost when frosting is performed, and the first heat exchanger can be enabled to release heat outwards, so that the radiating tube performs a heating function.

When the refrigerant flows along the second refrigerant path, the outlet of the compressor is communicated with the first port of the four-way valve, the four-way valve is switched to be communicated with the first port of the four-way valve and the third port of the four-way valve, the third port of the four-way valve is communicated with the first heat exchange tube, the first heat exchange tube is communicated with the fourth port of the refrigerant tube through the first expansion valve, the third port of the refrigerant tube is communicated with the second port of the refrigerant tube through the second expansion valve, the first port of the refrigerant tube is communicated with the fourth port of the four-way valve, the fourth port of the four-way valve is communicated with the second port of the four-way valve, and the second port of the four-way valve is communicated with the inlet of the compressor; the refrigerant flows out of the compressor through the compressor outlet, then flows through the four-way valve, the first heat exchange tube, the first expansion valve, the second heat exchange part, the second expansion valve, the first heat exchange part and the four-way valve in sequence, and then flows back to the compressor through the compressor inlet.

When the refrigerant flows along the second refrigerant path, the first expansion valve can be used for not performing a throttling function, the second expansion valve can be used for throttling, the second heat exchange part is used as a condenser, the first heat exchange part is used as an evaporator, the second heat exchange part can be used for defrosting when frosting, the first heat exchanger can be used for radiating heat outwards, and the radiating pipe is used for performing a heating function.

The first refrigerant path and the second refrigerant path are arranged, so that the refrigerant can flow along the first refrigerant path and be switched along the second refrigerant path, the first heat exchange part and the second heat exchange part can be defrosted alternately, meanwhile, the heat dissipation pipe can continuously heat the indoor space and the four-way valve is not commutated, continuous heating can be realized, and the problems of indoor side temperature fluctuation and refrigerant impact noise caused by the commutation of the four-way valve are effectively solved.

In some embodiments of the present application, referring to fig. 1-5, the air conditioning system further includes a first diverter 34, a second diverter 35, a third diverter 36, and a fourth diverter 37.

Wherein the second port of the first reversing element is connected with the first end of the refrigerant tube.

The first interface of the second reversing piece is connected with one end, far away from the first heat exchange tube, of the first expansion valve, the third interface of the second reversing piece is connected with the first interface of the first reversing piece, and the second interface of the second reversing piece is connected with a pipeline between the second end of the refrigerant tube and the second expansion valve.

The third connector of the third reversing element is connected with the fourth end of the refrigerant pipe, and the first connector of the third reversing element is connected with a pipeline between the second reversing element and the first expansion valve.

The third interface of the fourth reversing piece is connected with the third interface of the first reversing piece, the first interface of the fourth reversing piece is connected with the second interface of the third reversing piece, and the second interface of the fourth reversing piece is connected with the four-way valve. Specifically, the second interface of the fourth reversing element is connected with the fourth port of the four-way valve.

The flow path of the refrigerant may be changed by the communication manner of the first, second, third and fourth commutators, so that the first and second refrigerant paths can be formed.

The first reversing piece, the second reversing piece, the third reversing piece and the fourth reversing piece can be three-way valves, and a first refrigerant path and a second refrigerant path are formed by controlling the communication and isolation of the interfaces of the four three-way valves.

The first interface, the second interface and the third interface of the first reversing piece, the second reversing piece, the third reversing piece and the fourth reversing piece can be respectively and sequentially arranged clockwise. Specifically, referring to fig. 3, the three-way valve ports include a three-way valve first port 381, a three-way valve second port 382, and a three-way valve third port 383, which are sequentially provided in a clockwise direction.

The third port of the first reversing element is closed when the refrigerant is flowing along the first refrigerant path; the second interface of the second reversing element is closed; the first interface of the third reversing element is closed; the third interface of the fourth reversing element is closed.

The first port of the first reversing element is closed when the refrigerant is flowing along the second refrigerant path; the first interface, the second interface and the third interface of the second reversing element are closed; the second interface of the third reversing element is closed; the first port of the fourth reversing element is closed.

In some embodiments of the present application, referring to fig. 6, the air conditioning system further includes an indoor unit including an indoor cabinet, an indoor fan, and an indoor heat exchanger 41.

An indoor air inlet and an indoor air outlet are arranged on the indoor casing, and an indoor air channel is arranged in the indoor casing, wherein the indoor air channel is communicated with the indoor air inlet and the indoor air outlet.

The indoor fan and the indoor heat exchanger are arranged in the indoor machine shell and are positioned in the indoor air channel, wherein the indoor heat exchanger is arranged at the indoor air inlet and is positioned at the inner side of the indoor air inlet, the indoor heat exchanger is used for exchanging heat with air entering the indoor air channel, the indoor fan is arranged at one side of the indoor heat exchanger away from the indoor air inlet, the indoor fan is used for providing power for the flowing of the air, under the driving of the indoor fan, the indoor air enters the indoor air channel through the indoor air inlet, the air entering the indoor air channel exchanges heat with the indoor heat exchanger at the indoor heat exchanger, and the air after exchanging heat flows out of the indoor air channel through the indoor air outlet.

The air conditioning system further includes a third expansion valve 51; the third expansion valve 51 is connected to the indoor heat exchanger. The indoor heat exchanger and the third expansion valve are arranged, so that the indoor heat exchanger can be used for refrigerating, the radiating pipe can be used for realizing ground heating, and the user experience is improved.

One end of the indoor heat exchanger is connected with the four-way valve, the third expansion valve is connected with the indoor heat exchanger in series and is connected with the outdoor heat exchanger, and a refrigerant flow path where the indoor heat exchanger and the third expansion valve are positioned is connected with a refrigerant flow path where the first expansion valve and the first heat exchange tube are positioned in parallel; the third expansion valve is isolated from the outdoor heat exchanger as the refrigerant flows along the first refrigerant path and the second refrigerant path; when defrosting is carried out on the first heat exchange part and the second heat exchange part, the refrigerant does not flow in the indoor heat exchanger, defrosting noise is avoided being generated at the indoor heat exchanger, and user experience is improved.

Referring to fig. 7, during refrigeration, the refrigerant flows out of the compressor, is split into two paths after passing through the four-way valve, one path flows into the first heat exchange part, the other path flows into the second heat exchange part, the refrigerant flows out of the first heat exchange part and the second heat exchange part and is converged, the converged refrigerant can flow into the third expansion valve and flows back to the compressor through the indoor heat exchanger and the four-way valve, at the moment, the indoor heat exchanger is used for refrigeration, and the first heat exchange pipe does not work; the combined refrigerant can be divided into two paths, wherein one path of the refrigerant flows into the indoor heat exchanger through the third expansion valve, the other path of the refrigerant flows into the first heat exchange tube through the first expansion valve, the refrigerant flows out of the first heat exchange tube and the indoor heat exchanger and then is combined, and the combined refrigerant flows back to the compressor through the four-way valve, so that the indoor heat exchanger and the radiating tube are both refrigerated.

Referring to fig. 8, during heating, a refrigerant flows out of the compressor, flows into the first heat exchange tube after passing through the four-way valve, is divided into two paths after being throttled by the first expansion valve, one path flows into the first heat exchange part, the other path flows into the second heat exchange part, flows out of the first heat exchange part and the second heat exchange part and merges, and then flows back into the compressor after passing through the four-way valve, so that the heat dissipation tube controls heating and the indoor heat exchanger does not work; or the refrigerant flows out of the compressor and is divided into two paths after flowing into the first heat exchange tube through the four-way valve, one path flows into the first expansion valve for throttling, the other path flows into the indoor heat exchanger and then flows into the third expansion valve for throttling, the refrigerant flowing out of the first expansion valve and the refrigerant flowing out of the third expansion valve are converged, the converged refrigerant is divided into two paths, one path flows into the first heat exchange part, the other path flows into the second heat exchange part, the refrigerant flows out of the first heat exchange part and the second heat exchange part and is converged, and the converged refrigerant flows back into the compressor through the four-way valve, so that the indoor heat exchanger and the radiating tube are heated.

When defrosting, the first heat exchange part can be defrosted, and the second heat exchange part can be defrosted, when defrosting the first heat exchange part, the refrigerant flows out of the compressor, flows into the first heat exchange pipe after passing through the four-way valve, flows into the first heat exchange part after passing through the first expansion valve, the first expansion valve is not throttled, flows into the second heat exchange part after being throttled by the second expansion valve, and flows back into the compressor after flowing out of the second heat exchange part through the four-way valve; when defrosting the second heat exchange part, the refrigerant flows out of the compressor, flows into the first heat exchange pipe after passing through the four-way valve, flows into the second heat exchange part after passing through the first expansion valve, is not throttled by the first expansion valve, flows into the first heat exchange part after being throttled by the second expansion valve, and flows back to the compressor after flowing out of the first heat exchange part through the four-way valve.

When the air conditioning system comprises a first reversing piece, a second reversing piece, a third reversing piece and a fourth reversing piece, the third expansion valve is connected with a pipeline between the second reversing piece and the first expansion valve, and the connection part of the third expansion valve and the pipeline is positioned at one side, close to the first expansion valve, of the connection part of the third reversing piece and the pipeline, so that smooth refrigeration can be ensured.

In some embodiments of the present application, the indoor heat exchangers may have a plurality of indoor heat exchangers arranged in parallel, the plurality of indoor heat exchangers are connected with a four-way valve, one side of each indoor heat exchanger far away from the four-way valve is connected with a third expansion valve, one end of the third expansion valve is connected with the indoor heat exchanger, and the other ends of the plurality of third expansion valves are connected with the outdoor heat exchanger. The plurality of indoor heat exchangers are arranged, so that the plurality of indoor heat exchangers can be placed at different positions, and the refrigerating effect can be improved.

In some embodiments of the present application, referring to fig. 6, the air conditioning system further includes a valve box 52, wherein a third expansion valve is provided in the valve box, and the third expansion valve is provided in the valve box, so that the third expansion valve can be uniformly managed and can be protected.

In some embodiments of the present application, the air conditioning system further includes a solenoid valve 61 connected to a flow path parallel to the flow path in which the first heat exchange tube is located, the solenoid valve is disposed on a side of the third expansion valve away from the indoor heat exchanger and connected to a plurality of third expansion valves, and the solenoid valve is disposed to be capable of communicating or isolating the outdoor heat exchanger and the third expansion valves.

Referring to fig. 6, the air conditioning system further includes a check valve 62, the check valve 62 is connected to a flow path parallel to the flow path where the first heat exchange tube is located, an inlet end of the check valve 62 is connected to an end of the indoor heat exchanger far away from the third expansion valve, an outlet end of the check valve is connected to the four-way valve, and the check valve is configured to limit a flow direction of the refrigerant.

Referring to fig. 6, the air conditioning system further includes a first shut-off valve 63, the first shut-off valve 63 is connected to a side of the solenoid valve near the third expansion valves, and the first shut-off valve is connected to the plurality of third expansion valves through a pipe.

Referring to fig. 6, the air conditioning system further includes a first air side needle valve 64, the first air side needle valve 64 is connected to a side of the check valve close to the indoor heat exchangers, and the first air side needle valve is connected to the plurality of indoor heat exchangers through a pipeline.

The first stop valve and the first air side needle valve are arranged, so that the air conditioning system is convenient to assemble, and refrigerant leakage is avoided.

Referring to fig. 6, the air conditioning system further includes a second stop valve 65 and a second air side needle valve 66, and the second stop valve and the second air side needle valve are provided to facilitate assembly of the air conditioning system and prevent leakage of refrigerant. Wherein the second shut-off valve 65 is connected between the first expansion valve and the first heat exchange tube. The second air side needle valve 66 is connected to a flow path juxtaposed to the indoor heat exchanger, and the second air side needle valve 66 is connected in series with the first heat exchange tube, the second air side needle valve 66 being located on a side of the first heat exchange tube close to the four-way valve.

Referring to fig. 7, when refrigerating, the solenoid valve is opened, the first expansion valve is closed, the second expansion valve is fully opened, the first interface of the first reversing element is closed, the second interface and the third interface are opened, the third interface of the second reversing element is closed, the first interface and the second interface are opened, the first interface of the third reversing element is closed, the second interface and the third interface are opened, and the three interfaces of the fourth reversing element are all opened; the refrigerant flows into the fourth reversing piece through the compressor outlet and the four-way valve, then is divided into two paths, one path flows into the first heat exchange part through the first reversing piece, the other path flows into the second heat exchange part through the third reversing piece, the refrigerant flowing out of the second heat exchange part is converged with the refrigerant flowing out of the first heat exchange part through the second expansion valve, the converged condensed refrigerant enters the valve box through the second reversing piece, the electromagnetic valve and the first stop valve, enters the indoor heat exchanger after being throttled and depressurized through the third expansion valve in the valve box, and the refrigerant sequentially returns to the compressor through the valve box, the first air side needle valve, the one-way valve, the four-way valve, the gas-liquid separator and the compressor inlet after absorbing heat and gasifying, so that the refrigeration cycle is completed.

Referring to fig. 8, when heating, the solenoid valve is closed, the second expansion valve is fully opened, the first interface of the first reversing element is closed, the second interface and the third interface are opened, the third interface of the second reversing element is closed, the first interface and the second interface are opened, the first interface of the third reversing element is closed, the second interface and the third interface are opened, and the three interfaces of the fourth reversing element are all opened; the refrigerant enters the first heat exchange tube through the compressor outlet, the four-way valve and the second air side needle valve, the high-pressure liquid refrigerant after condensation and heat dissipation flows into the first expansion valve through the second stop valve, throttled and depressurized into a low-temperature low-pressure two-phase state through the first expansion valve, then is divided into two paths through the second reversing piece, one path flows into the first heat exchange part, the other path flows into the second heat exchange part through the second expansion valve, the refrigerant flowing out of the first heat exchange part flows into the fourth reversing piece through the first reversing piece, the refrigerant flowing out of the second heat exchange part flows into the fourth reversing piece through the third reversing piece, and the refrigerant flowing out of the fourth reversing piece returns into the compressor through the four-way valve, the air-liquid separator and the compressor inlet, so that the heating cycle is completed.

When defrosting, the electromagnetic valve is closed, and no refrigerant flows in the indoor heat exchanger. When the heating is changed into defrosting, the four-way valve is not reversed. When the first heat exchange part and the second heat exchange part are defrosted alternately, the four-way valve does not change direction, and the first heat exchange part and the second heat exchange part are defrosted alternately by opening and closing the interfaces of the first reversing piece, the second reversing piece, the third reversing piece and the fourth reversing piece.

Referring to fig. 9, when defrosting the first heat exchanging part, the third interface of the first reversing element is closed and the first and second interfaces are opened, the second interface of the second reversing element is closed and the first and third interfaces are opened, the first interface of the third reversing element is closed and the second and third interfaces are opened, and the third interface of the fourth reversing element is closed and the first and second interfaces are opened; the refrigerant enters the first heat exchange tube through the compressor outlet, the four-way valve and the second air side needle valve, the condensed and radiated high-pressure liquid refrigerant flows into the first expansion valve through the second stop valve, the first expansion valve has no throttling effect, the refrigerant flowing out of the first expansion valve flows into the first heat exchange part through the second reversing piece and the first reversing piece, the heat radiation of the refrigerant in the first heat exchange part is completed, at the moment, the outdoor fan at the first heat exchange part is stopped, the refrigerant flowing out of the first heat exchange part flows into the second expansion valve for throttling, the low-temperature low-pressure liquid refrigerant throttled by the second expansion valve flows into the second heat exchange part, and then returns into the compressor through the third reversing piece, the fourth reversing piece, the four-way valve, the air-liquid separator and the compressor inlet, and the defrosting of the first heat exchange part is completed.

Referring to fig. 10, when defrosting the second heat exchanging part, the first interface of the first reversing element is closed and the second and third interfaces are opened, the interfaces of the second reversing element are both closed, the second interface of the third reversing element is closed and the first and third interfaces are opened, and the first interface of the fourth reversing element is closed and the second and third interfaces are opened; the refrigerant enters the first heat exchange tube through the compressor outlet, the four-way valve and the second air side needle valve, the high-pressure liquid refrigerant after condensation and heat dissipation flows into the first expansion valve through the second stop valve, the first expansion valve has no throttling effect, the refrigerant flowing out of the first expansion valve flows into the second heat exchange part through the third reversing piece, the heat dissipation of the refrigerant in the second heat exchange part is completed, at the moment, the outdoor fan at the second heat exchange part is stopped, the refrigerant flowing out of the second heat exchange part flows into the second expansion valve for throttling, the low-temperature low-pressure liquid refrigerant throttled by the second expansion valve flows into the first heat exchange part, and then returns into the compressor through the first reversing piece, the fourth reversing piece, the four-way valve, the air-liquid separator and the compressor inlet, and the defrosting of the second heat exchange part is completed.

In some embodiments of the present application, referring to fig. 13, the first heat exchange portion is located above the second heat exchange portion, and a water receiving tray 71 is disposed between the first heat exchange portion and the second heat exchange portion, so that water generated by defrosting the first heat exchange portion is prevented from aggravating frosting or icing of the second heat exchange portion, and partition defrosting is effectively ensured.

The outdoor fan comprises a first outdoor fan and a second outdoor fan, wherein the first outdoor fan is arranged on one side of the second heat exchange part, and the second outdoor fan is arranged on one side of the second heat exchange part.

The drain hole is arranged on the water receiving disc, so that condensed water received by the water receiving disc can be discharged out of the water receiving disc.

In some embodiments of the present application, referring to fig. 9 to 10, the air conditioning system further includes a first defrost sensor 67 provided on the first heat exchanging portion, a second defrost sensor 68 for detecting a temperature of the first heat exchanging portion so that defrosting operation can be performed when frosting is performed on the first heat exchanging portion, and an outlet air temperature sensor 69. The second defrosting sensor is arranged on the second heat exchange part and is used for detecting the temperature of the second heat exchange part, so that defrosting operation can be performed when frost is formed on the second heat exchange part. The air outlet temperature sensor 69 is arranged on an air outlet pipeline of the compressor and is used for detecting the temperature of the air outlet pipeline of the compressor.

Referring to fig. 11-12, the air conditioning system further includes a controller configured to:

when the detected first heat exchange part temperature does not reach the first set temperature and the detected second heat exchange part temperature does not reach the second set temperature, and the duration of the first heat exchange part temperature not reaching the first set temperature and the second heat exchange part temperature not reaching the second set temperature reaches the first set time, the refrigerant flows along the first refrigerant path, and when the refrigerant flows along the first refrigerant path for the second set time and the first heat exchange part temperature reaches the first set temperature, the refrigerant flows along the second refrigerant path, and when the refrigerant flows along the second refrigerant path for the third set time and the temperature of the second heat exchange part reaches the second set temperature, the defrosting is finished;

When the detected first heat exchange part temperature does not reach the first set temperature and the detected second heat exchange part temperature reaches the second set temperature, and when the duration that the first heat exchange part temperature does not reach the first set temperature and the second heat exchange part temperature reaches the second set temperature reaches the first set time, the refrigerant flows along the first refrigerant path, and when the refrigerant flows along the first refrigerant path for the second set time and the temperature of the first heat exchange part reaches the first set temperature, defrosting is finished;

when the detected first heat exchange portion temperature reaches the first set temperature and the detected second heat exchange portion temperature does not reach the second set temperature, and the duration that the first heat exchange portion temperature reaches the first set temperature and the second heat exchange portion temperature does not reach the second set temperature reaches the first set time, the refrigerant flows along the second refrigerant path for the third set time and the temperature of the second heat exchange portion reaches the second set temperature, and defrosting is finished.

Specifically, referring to fig. 11-12, the air conditioning system can perform the steps of:

s1: acquiring the temperature of a first heat exchange part and the temperature of a second heat exchange part;

S2: judging whether the temperature of the first heat exchange part does not reach the first set temperature and whether the temperature of the second heat exchange part does not reach the second set temperature; when the two times are not reached, executing the step S3, and when the two times are not reached, executing the step S6;

s3: judging whether the duration time that the temperature of the first heat exchange part does not reach the first set temperature and the temperature of the second heat exchange part does not reach the second set temperature reaches the first set time, and executing the step S1 after running for a certain time when the duration time does not reach the first set time; when the temperature reaches the preset temperature, the first expansion valve is completely opened, the third interface of the first reversing piece is closed, the first interface and the second interface are opened, the second interface of the second reversing piece is closed, the first interface and the third interface are opened, the first interface of the third reversing piece is closed, the second interface and the third interface are opened, the third interface of the fourth reversing piece is closed, the first interface and the second interface are opened, the second expansion valve is opened to a certain opening degree, the outdoor fan at the first heat exchange part is stopped, and then the step S4 is executed;

s4: judging whether the temperature of the first heat exchange part does not reach the first set temperature and whether the defrosting time of the first heat exchange part reaches the second set time, if yes, closing a first interface of the first reversing piece, opening a second interface and a third interface, closing the interfaces of the second reversing piece, closing the second interface of the third reversing piece, opening the first interface and the third interface, closing the first interface of the fourth reversing piece, opening the second interface and the third interface, opening the second expansion valve to a certain opening degree, stopping an outdoor fan at the second heat exchange part, executing step S5, and if not, executing step S4 after running for a certain time;

S5: judging whether the temperature of the second heat exchange part reaches a second set temperature and whether the defrosting time of the second heat exchange part reaches a third set time, when the temperature reaches the second set temperature and the defrosting time reaches the third set time, finishing defrosting, and executing the step S5 after running for a certain time when the temperature does not reach the second set temperature and the defrosting time does not reach the third set time;

s6: judging whether the temperature of the first heat exchange part does not reach the first set temperature, executing the step S7 when the temperature does not reach the first set temperature, and executing the step S9 when the temperature does reach the first set temperature;

s7: judging whether the duration time when the temperature of the first heat exchange part does not reach the first set temperature reaches the first set time, and executing the step S6 after running for a certain time when the duration time does not reach the first set time; when the temperature reaches the preset value, the first electronic expansion valve is completely opened, the third interface of the first reversing piece is closed, the first interface and the second interface are opened, the second interface of the second reversing piece is closed, the first interface and the third interface are opened, the first interface of the third reversing piece is closed, the second interface and the third interface are opened, the third interface of the fourth reversing piece is closed, the first interface and the second interface are opened, the second expansion valve is opened to a certain opening degree, the outdoor fan at the first heat exchange part is stopped, and then the step S8 is executed;

s8: judging whether the temperature of the first heat exchange part reaches a first set temperature and whether the defrosting time of the first heat exchange part reaches a second set time, when the temperature reaches the first set temperature and the defrosting time of the first heat exchange part reaches the second set time, finishing defrosting, and executing a step S8 after running for a certain time when the temperature does not reach the first set temperature and the defrosting time of the first heat exchange part does not reach the second set time;

S9: judging whether the temperature of the second heat exchange part does not reach the second set temperature, executing the step S10 when the temperature does not reach the second set temperature, and ending defrosting when the temperature reaches the second set temperature;

s10: judging whether the duration time when the temperature of the second heat exchange part does not reach the second set temperature reaches the first set time, and executing the step S9 after running for a certain time when the duration time does not reach the first set time; when the temperature reaches the preset value, the first electronic expansion valve is completely opened, the first interface of the first reversing piece is closed, the second interface and the third interface are opened, the interfaces of the second reversing piece are closed, the second interface of the third reversing piece is closed, the first interface and the third interface are opened, the first interface of the fourth reversing piece is closed, the second interface and the third interface are opened, the second expansion valve is opened to a certain opening degree, the outdoor fan at the second heat exchange part is stopped, and then the step S11 is executed;

s11: and judging whether the temperature of the second heat exchange part reaches a second set temperature and whether the defrosting time of the second heat exchange part reaches a third set time, when the temperature reaches the second set temperature and the defrosting time reaches the third set time, ending defrosting, and when the temperature does not reach the second set temperature, executing the step S11 after running for a certain time.

When this step is performed, the solenoid valve is closed.

In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The terms "first," "second," and the like, 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 defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (10)

1. An air conditioning system, comprising:

a compressor;

the four-way valve is connected with the compressor;

a water tank;

the first heat exchange tube is arranged in the water tank, and one end of the first heat exchange tube is connected with the four-way valve;

the two ends of the radiating pipe are respectively communicated with the water tank;

the first expansion valve is connected with the other end of the first heat exchange tube;

a second expansion valve;

an outdoor heat exchanger;

a first refrigerant path and a second refrigerant path;

the outdoor heat exchanger includes:

a first heat exchange portion having a refrigerant tube first end and a refrigerant tube second end;

a second heat exchange portion having a refrigerant tube third end and a refrigerant tube fourth end;

the second end of the refrigerant pipe is connected with the third end of the refrigerant pipe, and the second expansion valve is connected to a flow path between the second end of the refrigerant pipe and the third end of the refrigerant pipe;

the compressor communicates with the first heat exchange tube through the four-way valve when refrigerant flows along a first refrigerant path; the first heat exchange tube is communicated with the first end of the refrigerant tube through the first expansion valve, the second end of the refrigerant tube is communicated with the third end of the refrigerant tube through the second expansion valve, and the fourth end of the refrigerant tube is communicated with the compressor through the four-way valve;

The compressor communicates with the first heat exchange tube through the four-way valve when refrigerant flows along a second refrigerant path; the first heat exchange tube is communicated with the fourth end of the refrigerant tube through the first expansion valve, the third end of the refrigerant tube is communicated with the second end of the refrigerant tube through the second expansion valve, and the first end of the refrigerant tube is communicated with the compressor through the four-way valve.

2. An air conditioning system according to claim 1, further comprising:

the second interface of the first reversing piece is connected with the first end of the refrigerant pipe;

the first connector of the second reversing piece is connected with one end, far away from the first heat exchange pipe, of the first expansion valve, the third connector of the second reversing piece is connected with the first connector of the first reversing piece, and the second connector of the second reversing piece is connected with a pipeline between the second end of the refrigerant pipe and the second expansion valve;

the third port of the third reversing piece is connected with the fourth end of the refrigerant pipe, and the first port of the third reversing piece is connected with a pipeline between the second reversing piece and the first expansion valve;

The third interface of the fourth reversing piece is connected with the third interface of the first reversing piece, the first interface of the fourth reversing piece is connected with the second interface of the third reversing piece, and the second interface of the fourth reversing piece is connected with the four-way valve.

3. The air conditioning system according to claim 1 or 2, further comprising:

an indoor heat exchanger;

a third expansion valve;

one end of the indoor heat exchanger is connected with the four-way valve, the third expansion valve is connected with the indoor heat exchanger in series and is connected with the outdoor heat exchanger, and a refrigerant flow path where the indoor heat exchanger and the third expansion valve are positioned is connected with a refrigerant flow path where the first expansion valve and the first heat exchange tube are positioned in parallel;

the third expansion valve is isolated from the outdoor heat exchanger as refrigerant flows along the first refrigerant path and the second refrigerant path.

4. An air conditioning system according to claim 3, wherein the indoor heat exchangers are arranged in parallel and connected with the four-way valve, one side of each indoor heat exchanger far away from the four-way valve is connected with a third expansion valve, one end of the third expansion valve is connected with the indoor heat exchanger, and the other ends of the plurality of third expansion valves are connected with the outdoor heat exchanger.

5. The air conditioning system of claim 4, further comprising:

and the valve box is internally provided with the third expansion valve.

6. The air conditioning system of claim 1, wherein the first heat exchange portion is located above the second heat exchange portion, and a water pan is provided between the first heat exchange portion and the second heat exchange portion.

7. An air conditioning system according to claim 3, further comprising:

the electromagnetic valves are connected to a flow path parallel to the flow path where the first heat exchange pipe is located, and are arranged on one side of the third expansion valve far away from the indoor heat exchanger and connected with a plurality of the third expansion valves;

the one-way valve is connected to a flow path parallel to the flow path where the first heat exchange tube is located, the inlet end of the one-way valve is connected with one end, far away from the third expansion valve, of the indoor heat exchanger, and the outlet end of the one-way valve is connected with the four-way valve.

8. The air conditioning system of claim 7, further comprising:

the first stop valve is connected to one side of the electromagnetic valve, which is close to the third expansion valves, and the first stop valve is connected with the third expansion valves through pipelines;

The first air side needle valve is connected to one side of the one-way valve, which is close to the indoor heat exchangers, and the first air side needle valve is connected with a plurality of indoor heat exchangers through pipelines.

9. An air conditioning system according to claim 3, further comprising:

the second stop valve is connected between the first expansion valve and the first heat exchange pipe;

the second air side needle valve is connected to a flow path parallel to the indoor heat exchanger and connected in series with the first heat exchange tube, and the second air side needle valve is positioned at one side of the first heat exchange tube close to the four-way valve.

10. An air conditioning system according to claim 3, further comprising:

the first defrosting sensor is arranged on the first heat exchange part;

and the second defrosting sensor is arranged on the second heat exchange part.