CN105465916B - Air Conditioning System - Google Patents

Abstract

The invention relates to the technical field of air conditioners, in particular to an air conditioning system. The invention provides an air conditioning system which comprises a compressor, an outdoor heat exchanger, a first throttling device, an indoor heat exchanger and a dehumidification system, wherein the compressor, the outdoor heat exchanger, the first throttling device and the indoor heat exchanger are connected through refrigerant pipelines to form an air conditioning loop, the dehumidification system comprises a dehumidification heat exchange loop, dehumidification heat transfer media of the dehumidification system circulate in the dehumidification heat exchange loop, a heat transfer medium heater is arranged on the dehumidification heat exchange loop, the heat transfer medium heater is provided with a refrigerant inlet and a refrigerant outlet, and the refrigerant inlet and the refrigerant outlet are respectively connected with the air conditioning loop so that the refrigerant of the air conditioning loop can heat the dehumidification heat transfer media flowing through the heat transfer medium heater. The air conditioning loop is coupled with the dehumidification system, and the refrigerant of the air conditioning loop is used for heating the dehumidification heat transfer medium of the dehumidification system, so that the air conditioning system has a dehumidification function while adjusting the temperature.

Description

Air Conditioning System

technical field

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

Background technique

With the user's precise adjustment requirements for the indoor environment, the demand for the dehumidification function of the air conditioner is increasingly urgent. However, as a widely used air-conditioning system, the multi-connected air-conditioning system currently only has cooling and heating functions, and the system design only considers these two functions. demand.

In addition, based on the existing air conditioning system, its gas-liquid separator can only evaporate the stored refrigerant by absorbing heat from the outside, and the heat exchange effect is poor, and under low temperature or low load conditions, the gas-liquid separator stored The liquid refrigerant cannot absorb heat and evaporate, causing this part of the refrigerant to be unable to circulate, resulting in a reduction in the amount of circulating refrigerant in the system.

Contents of the invention

A technical problem to be solved by the present invention is that the existing air-conditioning system cannot meet the user's demand for the dehumidification function.

In order to solve the above technical problems, the present invention provides an air-conditioning system, which includes a compressor, an outdoor heat exchanger, a first throttling device and an indoor heat exchanger connected by a refrigerant pipeline to form an air-conditioning circuit, and the air-conditioning system also Including the dehumidification system, the dehumidification system includes a dehumidification heat exchange circuit, the dehumidification heat transfer medium of the dehumidification system circulates in the dehumidification heat exchange circuit, the heat transfer medium heater is arranged on the dehumidification heat exchange circuit, and the heat transfer medium heater has a refrigerant inlet and a refrigerant The outlet, the refrigerant inlet and the refrigerant outlet are respectively connected to the air-conditioning circuit, so that the refrigerant in the air-conditioning circuit can heat the dehumidification heat transfer medium flowing through the heat transfer medium heater.

Optionally, the refrigerant inlet of the heat transfer medium heater is connected to the outlet of the compressor through a first pipeline.

Optionally, a first control valve is provided on the first pipeline.

Optionally, the refrigerant outlet of the heat transfer medium heater is connected to the refrigerant pipeline connected between the indoor heat exchanger and the outdoor heat exchanger through the second pipeline.

Optionally, the refrigerant outlet of the heat transfer medium heater is connected to the refrigerant pipeline connected between the first throttling device and the indoor heat exchanger through the second pipeline.

Optionally, a second throttling device is provided on the refrigerant pipeline between the indoor heat exchanger and the first throttling device, and the refrigerant outlet of the heat transfer medium heater is connected to the first throttling device and the second throttling device through the second pipeline. The refrigerant pipeline connection between the second throttling devices.

Optionally, a third throttling device is provided on the second pipeline.

Optionally, the refrigerant inlet of the heat transfer medium heater is also connected to the refrigerant pipeline connected between the indoor heat exchanger and the compressor through a third pipeline.

Optionally, the air conditioning system further includes a reversing valve, the reversing valve includes a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port is connected to the outlet of the compressor, and the second valve port The port is connected to the outdoor heat exchanger, the third valve port is connected to the inlet of the compressor, and the fourth valve port is connected to the indoor heat exchanger. When the valve port is connected to the fourth valve port, the air conditioning circuit is in the refrigeration cycle mode; when the reversing valve is switched to the connection between the first valve port and the fourth valve port and the second valve port is connected to the third valve port, the air conditioning circuit is in the heating cycle mode. Circulation mode: the refrigerant inlet of the heat transfer medium heater is connected to the refrigerant pipeline connected between the indoor heat exchanger and the fourth valve port of the reversing valve through the third pipeline.

Optionally, a second control valve is provided on the third pipeline.

Optionally, a one-way valve connected in series with the second control valve is also provided on the third pipeline, and the one-way valve is used to prevent the refrigerant in the refrigerant pipeline between the indoor heat exchanger and the compressor from flowing to the heat transfer medium heater refrigerant imports.

Optionally, the dehumidification system is a solution dehumidification system, and a dehumidification device is provided on the dehumidification heat transfer circuit. The dehumidification heat transfer medium is a solution, and the solution flows through the heat transfer medium heater to absorb heat from the refrigerant flowing out of the air conditioning circuit. It becomes a concentrated solution, and the concentrated solution flows through the dehumidification device to dehumidify the indoor air.

Optionally, the dehumidification system is a rotary dehumidification system, and a radiator is also provided on the dehumidification heat exchange circuit. The regeneration air is heated, and the regeneration air heated by the radiator enters the regeneration section of the runner of the dehumidification system for regeneration treatment.

Optionally, the air conditioning system further includes a gas-liquid separator arranged on the refrigerant pipeline at the inlet of the compressor, the gas-liquid separator includes a gas-liquid separator body and a heating device for heating the liquid refrigerant in the gas-liquid separator body .

Optionally, the heating device includes a heating coil for heating the liquid refrigerant in the gas-liquid separator body, the first end of the heating coil is connected to the outlet of the compressor through the fourth pipeline, and the first end of the heating coil is The two ends are connected with the refrigerant pipeline connected between the outdoor heat exchanger and the first throttling device, and the third control valve is arranged on the fourth pipeline.

The air conditioning system provided by the present invention couples the air conditioning circuit with the dehumidification system, uses the refrigerant of the air conditioning circuit to heat the dehumidification heat transfer medium of the dehumidification system, and uses the refrigerant of the air conditioning circuit as heat for dehumidification and regeneration of the dehumidification system. The dehumidification and cycle regeneration of the dehumidification system make the air conditioning system have the function of dehumidification while regulating the temperature. In addition, the cooling and heating functions of the air conditioning system can be controlled independently or in conjunction with the dehumidification function, making the operation of the air conditioning system flexible and convenient, and the exhaust gas from the compressor 11 is introduced into the heat transfer medium heater 31 as a heat source for dehumidification and regeneration. The heat transfer medium heater 31 replaces the function of part of the condenser, and recycles part of the heat that would be lost to the environment, so that the air conditioning system has a better energy-saving effect.

Other features of the present invention and advantages thereof will become apparent through the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 shows a schematic diagram of the principle of an air conditioning system according to a first embodiment of the present invention.

Fig. 2 shows a schematic diagram of the principle of an air conditioning system according to a second embodiment of the present invention.

Fig. 3 shows a schematic structural view of a gas-liquid separator according to an embodiment of the present invention.

In the picture:

1. Multi-connected outdoor unit; 2. Indoor unit; 3. Dehumidification system; 4. First pipeline; 5. Second pipeline; 6. Third pipeline; 7. Fourth pipeline;

11. Compressor; 12. Gas-liquid separator; 13. Reversing valve; 14. Outdoor heat exchanger; 21. Indoor heat exchanger; 31. Heat transfer medium heater; 32. Dehumidification device; 33. Radiator; 34, runner; 35, fan; 41, first solenoid valve; 61, second solenoid valve; 62, one-way valve; 71, third solenoid valve; EXV1, first electronic expansion valve; EXV2, second electronic expansion valve; EXV3, the third electronic expansion valve;

121, inlet pipe; 122, outlet pipe; 123, heating coil; 131, first valve port; 132, second valve port; 133, third valve port; 134, fourth valve port.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the Authorized Specification.

In the description of the present invention, it should be understood that the use of words such as "first" and "second" to define parts is only for the convenience of distinguishing corresponding parts. Therefore, it should not be construed as limiting the protection scope of the present invention.

Figures 1 and 2 show two embodiments of the invention. Referring to Fig. 1 and Fig. 2, the air conditioning system provided by the present invention includes a compressor 11, an outdoor heat exchanger 14, a first throttling device and an indoor heat exchanger 21 connected by a refrigerant pipeline to form an air conditioning circuit, and the The air conditioning system also includes a dehumidification system 3. The dehumidification system 3 includes a dehumidification heat exchange circuit. The dehumidification heat transfer medium of the dehumidification system 3 circulates in the dehumidification heat exchange circuit. A heat transfer medium heater 31 is arranged on the dehumidification heat exchange circuit. The medium heater 31 has a refrigerant inlet and a refrigerant outlet, which are respectively connected to the air conditioning circuit, so that the refrigerant in the air conditioning circuit can heat the dehumidification heat transfer medium flowing through the heat transfer medium heater 31 .

The air conditioning system provided by the present invention includes a dehumidification system 3, and a heat transfer medium heater 31 is provided on the dehumidification heat exchange circuit of the dehumidification system 3, and the refrigerant inlet and refrigerant outlet of the heat transfer medium heater 31 are respectively connected to the air conditioning circuit. In this way, the refrigerant in the air conditioning circuit provides the heat required for dehumidification to the dehumidification system. In this way, the air-conditioning system of the present invention not only has the function of adjusting air temperature, but also has the function of dehumidification, and these two functions can be performed simultaneously, or can be independently or linked to control, flexible and convenient operation, and can improve the energy-saving performance of the air-conditioning system.

In order to ensure the stability of the dehumidification function of the air conditioning system, the refrigerant inlet of the heat transfer medium heater 31 can be connected to the outlet of the compressor 11, that is, the dehumidification heat transfer medium of the dehumidification system 3 can be heated by the exhaust gas of the compressor 11 Since the refrigerant flowing out from the outlet of the compressor 11 is a high-temperature and high-pressure refrigerant, the heat source for dehumidification can be stabilized and highly efficient, thereby making the dehumidification function of the air-conditioning system more stable and the dehumidification efficiency higher. The exhaust gas is introduced into the heat transfer medium heater 31 as the heat source required for dehumidification and regeneration, and the heat transfer medium heater 31 is used to replace part of the condenser function to recycle part of the heat that would have been lost to the environment, which can effectively save energy .

The refrigerant outlet of the heat transfer medium heater 31 of the present invention can be connected to the refrigerant pipeline connected between the indoor heat exchanger 21 and the outdoor heat exchanger 14, for example, connected to the first throttling device and the indoor heat exchanger 21 In this way, the refrigerant that releases heat to the dehumidification heat transfer medium can re-enter the air-conditioning circuit for circulation at a position with similar parameters, so as to avoid a greater impact on the air-conditioning circuit or unnecessary energy waste.

In addition, in order to further solve the problem that the liquid refrigerant in the existing gas-liquid separator is difficult to evaporate, the present invention also improves the gas-liquid separator of the air-conditioning system. As shown in FIG. 3 , the gas-liquid separator 12 of the present invention includes a gas-liquid separator body and a heating device for heating the liquid refrigerant in the gas-liquid separator body. The setting of the heating device can make the evaporation of the liquid refrigerant in the gas-liquid separator 12 no longer limited by low temperature or low load conditions, increase the refrigerant circulation volume of the air conditioning system, improve the operating conditions of the air conditioning system, and ensure the heat transfer performance of the air conditioning system . Setting a heating device in the gas-liquid separator 12 after being coupled with the dehumidification system can make the air-conditioning circuit provide heat for the dehumidification system 3 more stably, and increase the stability and reliability of the dehumidification system 3 .

As an embodiment of the heating device, the heating device includes a heating coil 123, the first end and the second end of the heating coil 123 are respectively connected with the air conditioning circuit, for example, the first end of the heating coil 123 can be connected with the compressor 11 The outlet is connected, and the second end of the heating coil 123 can be connected to the refrigerant pipeline connected between the indoor heat exchanger 21 and the outdoor heat exchanger 14, so that the refrigerant in the air-conditioning circuit can be used to correct the liquid state in the gas-liquid separator body. The refrigerant is heated, so that the evaporation of the liquid refrigerant in the gas-liquid separator 12 is no longer limited by low temperature or low load conditions, increasing the refrigerant circulation of the air conditioning system, improving the operating status of the air conditioning system, and ensuring the heat transfer performance of the air conditioning system . Of course, the heating device may also be in other structural forms capable of providing stable and sufficient heat for the evaporation of the liquid refrigerant in the gas-liquid separator body.

The dehumidification system 3 of the present invention can have various implementations, for example, it can be a solution dehumidification system, or it can also be a rotary dehumidification system.

As shown in FIG. 1 , the dehumidification system 3 of the first embodiment of the present invention is a solution dehumidification system; as shown in FIG. 2 , the dehumidification system 3 of the second embodiment of the present invention is a rotary dehumidification system. The present invention will be described in more detail below in combination with these two embodiments.

It can be seen from FIG. 1 and FIG. 2 that in these two embodiments, the air conditioning system includes a multi-connected outdoor unit 1 , an indoor unit 2 and a dehumidification system 3 .

Among them, the multi-connected outdoor unit 1 includes a compressor 11, a gas-liquid separator 12, a reversing valve 13, an outdoor heat exchanger 14 and a first throttling device, and the indoor unit 2 includes an indoor heat exchanger 21 and a second section flow device, and the compressor 11, the reversing valve 13, the outdoor heat exchanger 14, the first throttling device, the second throttling device and the indoor heat exchanger 21 are sequentially connected through refrigerant pipelines to form a cooling and Air conditioning circuit for heating.

Reversing valve 13 all comprises first valve port 131, second valve port 132, the 3rd valve port 133 and the 4th valve port 134, and first valve port 131 is connected with the outlet of compressor 1, and second valve port 132 is connected with outdoor The heat exchanger 14 is connected, the third valve port 133 is connected with the inlet of the compressor 11 , and the fourth valve port 134 is connected with the indoor heat exchanger 21 .

By setting the reversing valve 13, the air-conditioning circuit can not only realize the refrigeration cycle, but also realize the heating cycle: when the reversing valve 13 is switched so that the first valve port 131 communicates with the second valve port 132 and the third valve port 133 communicates with the second valve port 132 When the fourth valve port 134 is connected, the refrigerant flowing out from the outlet of the compressor 11 flows through the outdoor heat exchanger 14, the first throttling device, the second throttling device and the indoor heat exchanger 21 in sequence, and finally passes through the gas-liquid separator 12 Flow back to the inlet of the compressor 11 to complete the cycle. At this time, the outdoor heat exchanger 14 is a condenser, the indoor heat exchanger 21 is an evaporator, and the air-conditioning circuit is in the refrigeration cycle mode; and when the reversing valve 13 is switched to the first valve port When 131 communicates with the fourth valve port 134 and the second valve port 132 communicates with the third valve port 133, the refrigerant flowing out from the outlet of the compressor 11 flows through the indoor heat exchanger 21, the second throttling device, and the first throttling device in sequence. device and the outdoor heat exchanger 14, and finally flow back to the inlet of the compressor 11 through the gas-liquid separator 12 to complete the cycle. At this time, the indoor heat exchanger 21 is a condenser, the outdoor heat exchanger 14 is an evaporator, and the air conditioning circuit is a system thermal cycle mode.

In these two embodiments, the first throttling device adopts the first electronic expansion valve EXV1, and the second throttling device adopts the second electronic expansion valve EXV2.

The gas-liquid separator 12 is arranged at the inlet of the compressor 11. In these two embodiments, the gas-liquid separator 12 includes a gas-liquid separator body and a heating device for heating the liquid refrigerant in the gas-liquid separator body. Wherein, the gas-liquid separator body includes an inlet pipe 121 and an outlet pipe 122, the inlet pipe 121 is connected with the third valve port 133, and the outlet pipe 122 is connected with the inlet of the compressor 11; the heating device includes a heating coil 123, and the heating coil The first end of 123 is connected to the outlet of the compressor 11 through the fourth pipeline 7, and the second end of the heating coil 123 is connected to the refrigerant pipeline connected between the outdoor heat exchanger 14 and the first throttling device, so that The high-temperature and high-pressure gaseous refrigerant flowing out from the compressor 11 can be used to heat and evaporate the liquid refrigerant in the gas-liquid separator body, and the liquid refrigerant flowing out from the heating coil 123 can reflow into the refrigerant pipeline to participate in the refrigeration or heating cycle .

A third control valve for controlling the on-off of the fourth pipeline 7 is provided on the fourth pipeline 7 to control the heating coil 123 to work when needed. In these two embodiments, the third control valve is the third solenoid valve 71 .

It can be seen from Fig. 3 that the heating coil 123 is arranged in the gas-liquid separator body and is located in the lower half, and surrounds the outlet pipe 122 in the middle, so that the structure of the existing gas-liquid separator 12 is less changed and the structure is relatively simple. Moreover, the high-temperature and high-pressure liquid refrigerant enters and exits from the bottom of the heating coil 123 , which can more effectively evaporate the liquid refrigerant in the gas-liquid separator body, so that the compressor 11 can suck air and increase the circulation of the refrigerant.

In these two embodiments, the dehumidification system 3 includes a dehumidification heat exchange circuit, and the heat transfer medium heater 31 is arranged on the dehumidification heat exchange circuit. The refrigerant inlet of the heat transfer medium heater 31 passes through the first pipeline 4 and the compressor The outlet of the compressor 11 is connected, and the refrigerant outlet of the heat transfer medium heater 31 is connected to the refrigerant pipeline connected between the first throttling device and the second throttling device through the second pipeline 5, so that the refrigerant flowing out of the compressor 11 Part of the gaseous refrigerant flows through the heat transfer medium heater 31, and heats the dehumidification heat transfer medium circulating in the dehumidification heat exchange circuit and flowing through the heat transfer medium heater 31, providing a heat source for the dehumidification regeneration of the dehumidification system 3, The liquid refrigerant flowing out from the refrigerant outlet of the heat transfer medium heater 31 can also flow into the air-conditioning circuit and continue to circulate in the air-conditioning system.

A first control valve for controlling the on-off of the first pipeline 4 is provided on the first pipeline 4 to control the dehumidification system 3 to work when dehumidification is required. In these two embodiments, the first control valve is the first solenoid valve 41 .

A third throttling device is provided on the second pipeline 5 to adjust the refrigerant flow rate and refrigerant pressure flowing through the heat transfer medium heater 31 to avoid waste of this part of refrigerant. In these two embodiments, the third throttling device is the third electronic expansion valve EXV3.

In addition, the refrigerant inlet of the heat transfer medium heater 31 can also be connected to the refrigerant pipeline connected between the indoor heat exchanger 21 and the compressor 11 through the third pipeline 6 . In these two embodiments, the refrigerant inlet of the heat transfer medium heater 31 is connected to the refrigerant pipeline connected between the indoor heat exchanger 21 and the fourth valve port 134 through the third pipeline 6 at the same time.

A second control valve, such as a second solenoid valve 61 , is provided on the third pipeline 6 to control the on-off of the third pipeline 6 . Further, in order to prevent the refrigerant in the refrigerant pipeline between the indoor heat exchanger 21 and the compressor 11 from flowing to the refrigerant inlet of the heat transfer medium heater 31, a second control valve connected in series is provided on the third pipeline 6. The one-way valve 62. The inlet end of the one-way valve 62 is connected to the second electromagnetic valve 61 , and the outlet end is connected to the refrigerant pipeline connected between the indoor heat exchanger 21 and the fourth valve port 134 .

The difference between these two embodiments is that in the first embodiment shown in Figure 1, the dehumidification system 3 is a solution dehumidification system, that is, the air is dehumidified using a solution; and in the second embodiment shown in Figure 2 In the embodiment, the dehumidification system 3 is a wheel dehumidification system, which dehumidifies and regenerates the air through the wheel 34 .

As shown in Figure 1, in the first implementation of the present invention, the dehumidification heat transfer circuit is also provided with a dehumidification device 32, the dehumidification heat transfer medium is a solution, and the solution flows through the heat transfer medium heater 31 from the air conditioner circuit. After the refrigerant absorbs heat, it changes from a dilute solution to a concentrated solution, and the concentrated solution flows through the dehumidification device 32 to dehumidify the indoor air.

Next, taking the air-conditioning circuit as a refrigeration cycle as an example, the working principle of the air-conditioning system of the first embodiment is described as follows:

(1) After the indoor unit 2 is turned on, if there is a demand for dehumidification, part of the high-temperature refrigerant at the outlet of the compressor 11 of the multi-connected outdoor unit 1 enters the outdoor radiator 14 to condense and dissipate heat. The flow of this part of the refrigerant can be controlled by the first electronic expansion valve EXV1 The other part enters the heat transfer medium heater 31 and directly heats the dilute solution, evaporates the moisture in the dilute solution, and makes the solution become a concentrated solution, and then the concentrated solution flows through the dehumidification device 32 to dehumidify the indoor air intake, and complete the dehumidification process. The on-off of this part of refrigerant is controlled by the first electromagnetic valve 41, and the flow rate is controlled by the third electronic expansion valve EXV2.

(2) If there is no need for dehumidification, close the first solenoid valve 41, the second solenoid valve 61, and the third electronic expansion valve EXV3, and cut off the refrigerant flowing into the heat transfer medium heater 31. At this time, the multi-connected outdoor unit 1 can follow the It works like a common multi-connected external unit.

(3) If under the condition of low temperature or low load, the gas-liquid separator 12 stores a large amount of liquid refrigerant, the heat exchange effect is poor, and the refrigerant evaporation amount is small, and a large amount of refrigerant will remain in the gas-liquid separator 12 At this time, the third electromagnetic valve 71 is opened, and a part of the high-temperature refrigerant at the outlet of the compressor 11 will be introduced into the heating coil 123 to release heat and condense, and heat up and accumulate in the gas-liquid separator 12. The liquid refrigerant evaporates and is sucked and compressed by the compressor, thereby increasing the refrigerant circulation of the air conditioning system and improving the operation of the air conditioning system.

As shown in Figure 2, in the second embodiment of the present invention, a radiator 33 is also provided on the dehumidification heat exchange circuit, and the dehumidification heat exchange medium flows through the heat transfer medium heater 31 to absorb heat from the refrigerant flowing out of the air conditioning circuit The regeneration air flows through the radiator 33 to heat the regeneration air, and the regeneration air heated by the radiator 33 enters the regeneration section of the runner 34 of the dehumidification system 3 for regeneration treatment. As can be seen from FIG. 2 , in this embodiment, the dehumidification system 3 further includes a fan 35 for blowing the regeneration air heated by the radiator 33 into the regeneration section of the rotor 34 .

Next, taking the air-conditioning circuit as a refrigeration cycle as an example, the working principle of the air-conditioning system of the first embodiment is described as follows:

(1) After the indoor unit 2 is turned on, if there is a need for dehumidification, part of the high-temperature refrigerant gas from the outlet of the compressor 11 of the multi-connected outdoor unit 1 enters the outdoor radiator 14 to condense and dissipate heat. The flow of this part of the refrigerant can pass through the first electronic expansion valve EXV1 Control; the other part enters the heat transfer medium heater 31 to exchange heat with the dehumidification heat transfer medium entering the radiator 33. After the radiator 33 heats the air, the fan 35 blows the hot air into the regeneration section of the runner 34 to realize the dehumidification regeneration of the runner , the on-off of this part of refrigerant is controlled by the first solenoid valve 41, and the flow rate is controlled by the third electronic expansion valve EXV3.

(2) If there is no need for dehumidification, close the first solenoid valve 41, the second solenoid valve 61, and the third electronic expansion valve EXV3, and cut off the refrigerant flowing into the heat transfer medium heater 31. At this time, the multi-connected outdoor unit 1 can follow the It works like a common multi-connected external unit.

(3) If under the condition of low temperature or low load, the gas-liquid separator 12 stores a large amount of liquid refrigerant, the heat exchange effect is poor, and the refrigerant evaporation amount is small, and a large amount of refrigerant will remain in the gas-liquid separator 12 At this time, the third electromagnetic valve 71 is opened, and a part of the high-temperature refrigerant at the outlet of the compressor 11 will be introduced into the heating coil 123 to release heat and condense, which will affect the gas-liquid separator 12. The liquid refrigerant releases heat to make it evaporate, and the refrigerant that evaporates into a gaseous state can be sucked and compressed by the compressor, thereby increasing the refrigerant circulation of the air conditioning system and improving the operation of the air conditioning system.

It can be seen that the air-conditioning systems of these two embodiments use the exhaust gas of the compressor 11 as a heat source for dehumidification regeneration and evaporation of the liquid refrigerant accumulated in the gas-liquid separator 12, which not only solves the problem that the multi-connected air-conditioning system in the prior art does not have dehumidification function and the insufficient evaporation of the liquid refrigerant in the gas-liquid separator 12 enables the air conditioning system to have cooling, heating and dehumidification functions that can be independently controlled and linked to control, ensuring that the refrigerant fully participates in the cycle, and makes the exhaust of the compressor 11 It can be more fully utilized, can effectively save energy, and improve the working reliability of the air conditioning system.

The above descriptions are only exemplary embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (14)

1. a kind of air-conditioning system includes connecting compressor (11), the outdoor heat exchanger to form air conditioner loop by refrigerant pipeline (14), first throttling device and indoor heat exchanger (21), which is characterized in that the air-conditioning system further includes dehumidification system (3), institute It includes dehumidifying heat-exchanging loop to state dehumidification system (3), and the dehumidifying heat transfer medium of the dehumidification system (3) is in the dehumidifying heat-exchanging loop Middle cycle, the dehumidifying heat-exchanging loop are equipped with heat transfer medium heater (31), and the heat transfer medium heater (31) has cold Matchmaker's import and refrigerant exit, the refrigerant inlet and the refrigerant exit are connect with the air conditioner loop respectively, so that the sky The dehumidifying heat transfer medium for flowing through the heat transfer medium heater (31) can be heated by recalling to the refrigerant on road；The biography The refrigerant exit of thermal fluid heater (31) is by the second pipeline (5) and is connected to the indoor heat exchanger (21) and the outdoor Refrigerant pipeline connection between heat exchanger (14)；The first throttling device includes the first electric expansion valve (EXV1).

2. air-conditioning system according to claim 1, which is characterized in that the refrigerant inlet of the heat transfer medium heater (31) It is connect with the outlet of the compressor (11) by the first pipeline (4).

3. air-conditioning system according to claim 2, which is characterized in that first pipeline (4) is equipped with the first control valve.

4. air-conditioning system according to claim 1, which is characterized in that the refrigerant exit of the heat transfer medium heater (31) Pass through second pipeline (5) and the refrigerant pipeline being connected between the first throttling device and the indoor heat exchanger (21) Connection.

5. air-conditioning system according to claim 4, which is characterized in that the indoor heat exchanger (21) and the first throttle Refrigerant pipeline between device is equipped with second throttling device, and the refrigerant exit of the heat transfer medium heater (31) is described in Second pipeline (5) is connect with the refrigerant pipeline being connected between the first throttling device and the second throttling device.

6. air-conditioning system according to claim 1, which is characterized in that second pipeline (5) is equipped with third throttling dress It sets.

7. air-conditioning system according to claim 2, which is characterized in that the refrigerant inlet of the heat transfer medium heater (31) Also connected by third pipeline (6) and the refrigerant pipeline being connected between the indoor heat exchanger (21) and the compressor (11) It connects.

8. air-conditioning system according to claim 7, the air-conditioning system further includes reversal valve (13), the reversal valve (13) Including the first valve port (131), the second valve port (132), third valve port (133) and the 4th valve port (134), first valve port (131) it is connect with the outlet of the compressor (1), second valve port (132) connect with the outdoor heat exchanger (14), described Third valve port (133) is connect with the import of the compressor (11), the 4th valve port (134) and the indoor heat exchanger (21) Connection switches to first valve port (131) in the reversal valve (13) and is connected to second valve port (132) and the third When valve port (133) is connected to the 4th valve port (134), the air conditioner loop is refrigeration cycle pattern, in the reversal valve (13) first valve port (131) is switched to be connected to the 4th valve port (134) and second valve port (132) and described the When three valve ports (133) are connected to, the air conditioner loop is heating circulation pattern；The refrigerant inlet of the heat transfer medium heater (31) Pass through the third pipeline (6) and the 4th valve port (134) for being connected to the indoor heat exchanger (21) and the reversal valve (13) Between refrigerant pipeline connection.

9. air-conditioning system according to claim 7, which is characterized in that the third pipeline (6) is equipped with the second control valve.

10. air-conditioning system according to claim 9, which is characterized in that be additionally provided on the third pipeline (6) and described The concatenated check valve of two control valves (62), the check valve (62) is for preventing the indoor heat exchanger (21) and the compressor (11) refrigerant in refrigerant pipeline between flows to the refrigerant inlet of the heat transfer medium heater (31).

11. according to any air-conditioning systems of claim 1-10, which is characterized in that the dehumidification system (3) is removed for solution Wet system, dehumidification device (32) is additionally provided in the dehumidifying heat transfer loop, and the dehumidifying heat transferring medium is solution, the solution stream Become dense molten from weak solution after the heat transfer medium heater (31) absorbs heat from the refrigerant flowed out from the air conditioner loop Liquid, the concentrated solution flow through the dehumidification device (32) and carry out dehumidification treatments to indoor air inlet.

12. according to any air-conditioning systems of claim 1-10, which is characterized in that the dehumidification system (3) is removed for runner Wet system is additionally provided with radiator (33) on the dehumidifying heat-exchanging loop, and the dehumidifying heat transferring medium flows through the heat transfer medium and adds Hot device (31) flows through the radiator (33) to add to regeneration air after absorbing heat from the refrigerant flowed out by the air conditioner loop Heat, by the radiator (33) heating the regeneration air enter the dehumidification system (3) runner (34) regenerator section into Row regeneration treatment.

13. according to any air-conditioning systems of claim 1-10, which is characterized in that the air-conditioning system further includes being set to Gas-liquid separator (12) on the refrigerant pipeline of the import of the compressor, the gas-liquid separator (12) includes gas-liquid separator Ontology and heating device for heating the intrinsic liquid refrigerants of the gas-liquid separator.

14. air-conditioning system according to claim 13, which is characterized in that the heating device includes for the gas-liquid The first end of the heating coil (123) that liquid refrigerants in separator body is heated, the heating coil (123) passes through Four pipelines (7) are connect with the outlet of the compressor (11), the second end of the heating coil (123) and are connected to the outdoor Refrigerant pipeline connection between heat exchanger (14) and the first throttling device, the 4th pipeline (7) control equipped with third Valve, the third control valve are used to control the break-make of the 4th pipeline (7).