阅读说明：本技术 冷媒循环系统和控制空调器除湿的方法及空调器 (Refrigerant circulation system, method for controlling air conditioner to dehumidify and air conditioner ) 是由 王树涛 刘伟 蒋贤国 石鑫 孙楠楠 于 2021-06-29 设计创作，主要内容包括：本发明公开了一种冷媒循环系统和控制空调器除湿的方法以及空调器,其中,冷媒循环系统包括压缩机、换向装置、室外换热器、室内换热器、第一电子膨胀阀、分流管路和第二电子膨胀阀,分流管路与换向装置和室外换热器分别连接,第二电子膨胀阀设置在分流管路上；室内换热器包括第一室内换热单元、第二室内换热单元和第三电子膨胀阀,第一室内换热单元的第一端与第一电子膨胀阀连接,第一室内换热单元的第二端与第二室内换热单元的第一端连接,第二室内换热单元的第二端与换向装置的第四管口连接,第三电子膨胀阀设置在第一室内换热单元与第二室内换热单元之间。本发明的冷媒循环系统,可以为空调器实现各种除湿模式提供硬件基础,成本低、适用范围广。(The invention discloses a refrigerant circulating system, a method for controlling dehumidification of an air conditioner and the air conditioner, wherein the refrigerant circulating system comprises a compressor, a reversing device, an outdoor heat exchanger, an indoor heat exchanger, a first electronic expansion valve, a shunting pipeline and a second electronic expansion valve, the shunting pipeline is respectively connected with the reversing device and the outdoor heat exchanger, and the second electronic expansion valve is arranged on the shunting pipeline; the indoor heat exchanger comprises a first indoor heat exchange unit, a second indoor heat exchange unit and a third electronic expansion valve, wherein the first end of the first indoor heat exchange unit is connected with the first electronic expansion valve, the second end of the first indoor heat exchange unit is connected with the first end of the second indoor heat exchange unit, the second end of the second indoor heat exchange unit is connected with a fourth pipe orifice of the reversing device, and the third electronic expansion valve is arranged between the first indoor heat exchange unit and the second indoor heat exchange unit. The refrigerant circulating system can provide a hardware basis for the air conditioner to realize various dehumidification modes, and has low cost and wide application range.)

1. A refrigerant circulation system, comprising:

the air conditioner comprises a compressor, a reversing device, an outdoor heat exchanger, an indoor heat exchanger and a first electronic expansion valve, wherein an air outlet of the compressor is connected with a first pipe orifice of the reversing device, an air return port of the compressor is connected with a second pipe orifice of the reversing device, a third pipe orifice of the reversing device is connected with a first end of the outdoor heat exchanger, a second end of the outdoor heat exchanger is connected with a first end of the indoor heat exchanger, a second end of the indoor heat exchanger is connected with a fourth pipe orifice of the reversing device, and the first electronic expansion valve is arranged on a pipeline connected between the second end of the outdoor heat exchanger and the first end of the indoor heat exchanger;

the first end of the shunting pipeline is connected with the third pipe orifice of the reversing device, the second end of the shunting pipeline is connected with the second end of the outdoor heat exchanger, and the second electronic expansion valve is arranged on the shunting pipeline;

the indoor heat exchanger comprises a first indoor heat exchange unit, a second indoor heat exchange unit and a third electronic expansion valve, the first end of the first indoor heat exchange unit is connected with the first electronic expansion valve, the second end of the first indoor heat exchange unit is connected with the first end of the second indoor heat exchange unit, the second end of the second indoor heat exchange unit is connected with a fourth pipe orifice of the reversing device, and the third electronic expansion valve is arranged on a pipeline connected with the second end of the first indoor heat exchange unit and the first end of the second indoor heat exchange unit.

2. The refrigerant cycle system as claimed in claim 1, wherein the first indoor heat exchanging unit and the second indoor heat exchanging unit are disposed in parallel with each other, and a gap is formed between the first indoor heat exchanging unit and the second indoor heat exchanging unit.

3. The refrigerant circulation system as claimed in claim 2, wherein the gap is not less than 5mm and not more than 10 mm.

4. A method for controlling dehumidification of an air conditioner, wherein the method is applied to the refrigerant circulation system of any one of claims 1 to 3, and the method comprises:

responding to a dehumidification control instruction, and acquiring indoor environment temperature;

determining a target dehumidification mode according to the indoor environment temperature;

acquiring the outdoor environment temperature, the outdoor coil pipe temperature and the air outlet temperature of the indoor heat exchanger;

controlling the refrigerant circulating system according to the target dehumidification mode, the indoor environment temperature, the outdoor coil pipe temperature and the air outlet temperature;

wherein the target dehumidification mode comprises one of a cooling dehumidification mode, a constant temperature dehumidification mode and a heating dehumidification mode.

5. The method as claimed in claim 4, wherein the controlling the refrigerant circulation system according to the target dehumidification mode, the indoor ambient temperature, the outdoor coil temperature and the outlet air temperature comprises:

determining that the target dehumidification mode is a heating dehumidification mode;

controlling the first electronic expansion valve to be fully opened, adjusting the opening degree of the second electronic expansion valve according to the outlet air temperature until the outlet air temperature is equal to the dehumidification set temperature, and adjusting the opening degree of the third electronic expansion valve according to the outlet air temperature;

and controlling the compressor to adjust to a first set frequency, further adjusting the frequency of the compressor according to the outlet air temperature, and controlling the indoor fan according to a set indoor air speed, and controlling the outdoor fan to operate at a minimum configuration gear.

6. The method as claimed in claim 4, wherein the controlling the refrigerant circulation system according to the target dehumidification mode, the indoor ambient temperature, the outdoor coil temperature and the outlet air temperature comprises:

determining that the target dehumidification mode is a constant-temperature dehumidification mode;

controlling the first electronic expansion valve to be fully opened, controlling the second electronic expansion valve to reach a first preset opening degree, further adjusting the opening degree of the second electronic expansion valve according to the outlet air temperature until the outlet air temperature reaches a dehumidification set temperature, and adjusting the opening degree of a third electronic expansion valve according to the outlet air temperature;

and controlling the compressor to adjust to a second set frequency, further adjusting the frequency of the compressor according to the outlet air temperature, and controlling the indoor fan according to a set indoor air speed to control the outdoor fan to operate at a minimum configuration gear.

7. The method of claim 6, wherein adjusting the opening degree of the second electronic expansion valve according to the outlet air temperature further comprises:

if the air outlet temperature is lower than the dehumidification set temperature, controlling the second electronic expansion valve to increase the opening until the air outlet temperature reaches the dehumidification set temperature;

and if the air outlet temperature is higher than the dehumidification set temperature, controlling the second electronic expansion valve to reduce the opening until the air outlet temperature reaches the dehumidification set temperature.

8. The method of claim 5 or 6, wherein adjusting the frequency of the compressor according to the outlet air temperature further comprises:

and if the air outlet temperature is lower than the dehumidification set temperature, raising the frequency of the compressor, if the air outlet temperature is equal to the dehumidification set temperature, maintaining the frequency of the compressor, and if the air outlet temperature is higher than the dehumidification set temperature, lowering the frequency of the compressor.

9. The method as claimed in claim 4, wherein the controlling the refrigerant circulation system according to the target dehumidification mode, the indoor ambient temperature, the outdoor coil temperature and the outlet air temperature comprises:

determining a target dehumidification mode as the cooling dehumidification mode;

controlling the second electronic expansion valve to be fully closed, controlling the third electronic expansion valve to be fully opened, acquiring the degree of superheat, and controlling the opening degree of the first electronic expansion valve according to the degree of superheat;

calculating an initial compressor frequency according to the indoor environment temperature and the outdoor coil temperature, controlling a compressor to maintain the initial compressor frequency, controlling an indoor fan according to a set indoor air speed, and controlling the rotating speed of an outdoor fan according to the outdoor environment temperature and the outdoor coil temperature.

10. The method of controlling dehumidification of an air conditioner according to claim 4, wherein determining a target dehumidification mode according to the indoor ambient temperature comprises:

the indoor environment temperature is greater than the dehumidification set temperature, and the target dehumidification mode is determined to be a cooling dehumidification mode;

the indoor environment temperature is equal to the dehumidification set temperature, and the target dehumidification mode is determined to be the constant-temperature dehumidification mode;

and the indoor environment temperature is greater than the set dehumidification temperature, and the target dehumidification mode is determined to be the heating dehumidification mode.

11. An air conditioner, comprising:

a refrigerant circulation system as claimed in any one of claims 1 to 3;

an indoor fan and an outdoor fan;

the first temperature sensor is used for collecting the indoor environment temperature;

the second temperature sensor is used for acquiring the outdoor environment temperature;

the third temperature sensor is used for collecting the inlet air temperature of the indoor heat exchanger;

the fourth temperature sensor is used for collecting the temperature of the outdoor coil pipe;

a controller for controlling the refrigerant circulation system according to the method for controlling dehumidification of an air conditioner as claimed in any one of claims 4 to 10.

Technical Field

The invention relates to the technical field of air conditioners, in particular to a refrigerant circulating system, a method for controlling dehumidification of an air conditioner and the air conditioner.

Background

At present, the number of air conditioners with the warming and dehumidifying functions is small, and if the warming and dehumidifying functions are realized, indoor electric heating is controlled to be started or a refrigerant device is added, and an outdoor fan is stopped.

However, the cost of using the air conditioner is increased due to the fact that the electric heating is started, and the refrigerant increasing device is not suitable for some air conditioner products due to space limitation or product cost limitation, and is small in application range.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, a first objective of the present invention is to provide a refrigerant circulation system, which provides a hardware basis for the air conditioner to implement various dehumidification modes, and has low cost and wide application range.

The second objective of the present invention is to provide a method for controlling dehumidification of an air conditioner.

The third objective of the present invention is to provide an air conditioner with the refrigerant circulating system.

In order to achieve the above object, a refrigerant cycle system according to an embodiment of the present invention includes: the air conditioner comprises a compressor, a reversing device, an outdoor heat exchanger, an indoor heat exchanger and a first electronic expansion valve, wherein an air outlet of the compressor is connected with a first pipe orifice of the reversing device, an air return port of the compressor is connected with a second pipe orifice of the reversing device, a third pipe orifice of the reversing device is connected with a first end of the outdoor heat exchanger, a second end of the outdoor heat exchanger is connected with a first end of the indoor heat exchanger, a second end of the indoor heat exchanger is connected with a fourth pipe orifice of the reversing device, and the first electronic expansion valve is arranged on a pipeline connected between the second end of the outdoor heat exchanger and the first end of the indoor heat exchanger; the first end of the shunting pipeline is connected with the third pipe orifice of the reversing device, the second end of the shunting pipeline is connected with the second end of the outdoor heat exchanger, and the second electronic expansion valve is arranged on the shunting pipeline; the indoor heat exchanger comprises a first indoor heat exchange unit, a second indoor heat exchange unit and a third electronic expansion valve, the first end of the first indoor heat exchange unit is connected with the first electronic expansion valve, the second end of the first indoor heat exchange unit is connected with the first end of the second indoor heat exchange unit, the second end of the second indoor heat exchange unit is connected with a fourth pipe orifice of the reversing device, and the third electronic expansion valve is arranged on a pipeline connected with the second end of the first indoor heat exchange unit and the first end of the second indoor heat exchange unit.

According to the refrigerant circulating system of the embodiment of the invention, a port is added at the pipe orifice of the reversing device connected with the outdoor heat exchanger, the port is connected with the second end of the outdoor heat exchanger through the shunt pipeline, and the shunt pipeline is provided with the second electronic expansion valve, namely, the refrigerant discharged from the exhaust port of the compressor is divided into two flow paths, wherein, the outdoor heat exchanger has the function of heat dissipation because the outdoor heat exchanger exchanges heat with the outside, when dehumidifying, the outdoor heat exchanger cools the high-temperature high-pressure refrigerant discharged by the compressor, the temperature of the refrigerant flowing out of the outdoor heat exchanger is reduced, the refrigerant in the shunt pipeline does not pass through the outdoor heat exchanger, the temperature of the refrigerant in the pipeline can be higher than the temperature of the refrigerant flowing out of the outdoor heat exchanger, and the two are converged in front of the first electronic expansion valve, so that the temperature of the refrigerant flowing out of the outdoor heat exchanger can be improved, thereby, when dehumidifying, the temperature of the refrigerant can be kept constant or improved, the constant-temperature dehumidification or the temperature rise dehumidification can be conveniently realized. And, set up indoor heat exchanger as two indoor heat exchange unit, first indoor heat exchange unit carries out the heat exchange with the room air with the refrigerant that flows through, the refrigerant temperature that reachs third electronic expansion valve reduces to some extent, adjust the aperture of third electronic expansion valve, and then the temperature of the refrigerant that gets into the indoor heat exchange unit of second further reduces, namely, when constant temperature dehumidification or intensification dehumidification, the indoor heat exchange unit of second is low temperature spare, the indoor air inlet reaches the effect of cooling dehumidification through carrying out the heat exchange with second heat exchange unit, become the cool wind that humidity is low, and then the cool wind can promote the temperature through first indoor heat exchange unit, make the air inlet temperature close with the air-out temperature or promote, thereby can realize constant temperature dehumidification or intensification dehumidification. In addition, the refrigerant circulating system does not need to be additionally provided with a refrigerant device, and has the advantages of low cost, small occupied space and wide application range.

In order to achieve the above object, a second aspect of the present invention provides a method for controlling dehumidification of an air conditioner, for use in the refrigerant circulation system, the method comprising: responding to a dehumidification control instruction, and acquiring indoor environment temperature; determining a target dehumidification mode according to the indoor environment temperature; acquiring the outdoor environment temperature, the outdoor coil pipe temperature and the air outlet temperature of the indoor heat exchanger; controlling the refrigerant circulating system according to the target dehumidification mode, the indoor environment temperature, the outdoor coil pipe temperature and the air outlet temperature; wherein the target dehumidification mode comprises one of a cooling dehumidification mode, a constant temperature dehumidification mode and a heating dehumidification mode.

According to the method for controlling the dehumidification of the air conditioner, based on the refrigerant circulating system of the embodiment, an electric heating device is not needed to be started or a refrigerant device is not needed to be added, the cost is low, the refrigerant circulating system is not limited by space, the application range is wide, the refrigerant circulating system is controlled according to the target dehumidification mode, the indoor environment temperature, the outdoor coil pipe temperature and the air outlet temperature, various dehumidification modes of the cooling dehumidification mode, the constant temperature dehumidification mode and the heating dehumidification mode can be achieved, and different dehumidification requirements are met.

In order to achieve the above object, an air conditioner according to an embodiment of a third aspect of the present invention includes: the refrigerant circulating system; an indoor fan and an outdoor fan; the first temperature sensor is used for collecting the indoor environment temperature; the second temperature sensor is used for acquiring the outdoor environment temperature; the third temperature sensor is used for collecting the inlet air temperature of the indoor heat exchanger; the fourth temperature sensor is used for collecting the temperature of the outdoor coil pipe; and the controller is used for controlling the refrigerant circulating system according to the method for controlling the dehumidification of the air conditioner.

According to the air conditioner provided by the embodiment of the invention, by adopting the refrigerant circulating system of the embodiment, an electric heating device is not required to be started or a refrigerant device is not required to be added, the cost is low, the refrigerant circulating system is not limited by space and has a wide application range, the controller responds to a dehumidification control instruction and controls the refrigerant circulating system according to a target dehumidification mode, an indoor environment temperature, an outdoor coil pipe temperature and an air outlet temperature, so that multiple dehumidification modes of a cooling dehumidification mode, a constant temperature dehumidification mode and a heating dehumidification mode can be realized, and different dehumidification requirements are met.

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

Drawings

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

FIG. 1 is a schematic diagram of a coolant circulation system according to an embodiment of the present invention;

FIG. 2 is a schematic view of an indoor heat exchanger according to one embodiment of the invention;

fig. 3 is a block diagram of an air conditioner according to an embodiment of the present invention;

FIG. 4 is a flowchart of a method of controlling dehumidification of an air conditioner according to one embodiment of the present invention;

fig. 5 is a flowchart of a method of controlling dehumidification of an air conditioner according to an embodiment of the present invention.

Detailed Description

Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.

The air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.

The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

The expansion valve 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 evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.

The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.

The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler in a cooling mode.

The air conditioner comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, an expansion valve and a reversing device for switching a refrigeration and heating mode, wherein the compressor, the indoor heat exchanger, the outdoor heat exchanger, the expansion valve and the reversing device for switching the refrigeration and heating mode form a refrigerant circulating system, the air conditioner can run in a common refrigeration mode when cooling and dehumidifying, however, if constant-temperature dehumidification or heating and dehumidification are carried out, an outdoor fan needs to be suspended, and after the outdoor fan is suspended, if no refrigerant heat dissipation device exists, the problem of temperature rise of a frequency conversion module of an outdoor unit cannot be solved.

In order to solve the above problems, an embodiment of the present invention provides a refrigerant circulation system, which provides hardware support for constant temperature dehumidification, temperature rise dehumidification and temperature reduction dehumidification, can implement multiple dehumidification modes, and has low cost, small occupied space and wide application range.

A refrigerant circulation system according to an embodiment of the present invention will be described with reference to fig. 1 and 2.

Fig. 1 is a schematic view of a refrigerant circulation system according to an embodiment of the present invention, and as shown in fig. 1, the refrigerant circulation system 1 according to the embodiment of the present invention includes a compressor 11, a reversing device 12, an outdoor heat exchanger 13, an indoor heat exchanger 14, a first electronic expansion valve 15, a branch line 18, and a second electronic expansion valve 19.

Wherein, the exhaust port of the compressor 11 is connected with a first pipe orifice of the reversing device 12, such as a D port of the four-way valve, the return air port of the compressor 11 is connected with a second pipe orifice of the reversing device 12, such as an S port of the four-way valve, a third pipe orifice of the reversing device 12, such as a C port of the four-way valve, is connected with a first end of the outdoor heat exchanger 13, a second end of the outdoor heat exchanger 13 is connected with a first end of the indoor heat exchanger 14, a second end of the indoor heat exchanger 14 is connected with a fourth pipe orifice of the reversing device 12, such as an E port of the four-way valve, and the first electronic expansion valve 15 is arranged on a pipe connected between the second end of the outdoor heat exchanger 13 and the first end of the indoor heat exchanger 13.

In the embodiment of the present invention, a shunt line 18 is added between a third pipe orifice of the reversing device 12, for example, a port C of the four-way valve, and a second end of the outdoor heat exchanger 13, a first end of the shunt line 18 is connected to the third pipe orifice of the reversing device 12, a second end of the shunt line 18 is connected to the second end of the outdoor heat exchanger 13, and a second electronic expansion valve 19 is disposed on the shunt line.

In an embodiment, the second electronic expansion valve 19 may be selected to be a fully closed type when closed, and only opened when performing constant temperature dehumidification or temperature rise dehumidification, and the second electronic expansion valve 19 may reduce the temperature and pressure of the refrigerant to prevent the refrigerant from impacting the first electronic expansion valve 15 to generate noise.

Specifically, a port is added to a pipeline connected to the third nozzle of the reversing device 12 to divide the refrigerant discharged from the discharge port of the compressor 11 into two flow paths, such as a flow path a and a flow path B. The refrigerant in the flow path a normally flows through the outdoor heat exchanger 13, and the refrigerant in the flow path B, i.e., the branch line 18, passes through the second electronic expansion valve 19, then joins the refrigerant in the flow path a to the front of the first electronic expansion valve 15, and then enters the indoor heat exchanger 14 after passing through the first electronic expansion valve 15. Wherein, because the outdoor heat exchanger 13 exchanges heat with the outside, it has the function of heat dissipation, when refrigerating, the outdoor heat exchanger 13 cools the high-temperature and high-pressure refrigerant discharged by the compressor 11, the temperature of the refrigerant flowing out of the outdoor heat exchanger 13 is reduced, the refrigerant in the flow path B does not pass through the outdoor heat exchanger 13, the temperature of the refrigerant in the flow path B, i.e. the diversion pipeline 18, can be higher than the temperature of the refrigerant flowing out of the outdoor heat exchanger 13, and the two are merged in front of the first electronic expansion valve 15, so that the temperature of the refrigerant flowing out of the outdoor heat exchanger 13 can be raised, for example, the temperature of the refrigerant before the high-temperature and high-pressure refrigerant discharged by the compressor passes through the outdoor heat exchanger and reaches the first electronic expansion valve 15 reaches 48 ℃, the temperature of the refrigerant before the high-temperature and high-pressure refrigerant passes through the diversion pipeline, therefore, during dehumidification operation, the temperature requirement of constant temperature or temperature rise cannot be met due to refrigeration, in other words, the addition of the shunt pipeline 18 and the second electronic expansion valve 19 can provide support for the temperature constancy or rise of the refrigerant, and the realization of constant temperature dehumidification or temperature rise dehumidification is facilitated.

In an embodiment, as shown in fig. 2, in the refrigerant cycle system 1 according to an embodiment of the present invention, the indoor heat exchanger 14 includes a first indoor heat exchanging unit 141, a second indoor heat exchanging unit 142, and a third electronic expansion valve 143, a first end of the first indoor heat exchanging unit 141 is connected to the first electronic expansion valve 15, a second end of the first indoor heat exchanging unit 141 is connected to a first end of the second indoor heat exchanging unit 142, a second end of the second indoor heat exchanging unit 142 is connected to the fourth pipe port of the reversing device 12, and the third electronic expansion valve 143 is disposed on a pipe connecting the second end of the first indoor heat exchanging unit 141 and the first end of the second indoor heat exchanging unit 142. Air is introduced from the second indoor heat exchange unit 142 side, and air is discharged from the first indoor heat exchange unit 141 side.

Specifically, as shown in fig. 1 and 2, the indoor heat exchangers 14 are arranged in two parts arranged in front of and behind each other, and the refrigerant passing through the first electronic expansion valve 15 passes through the first indoor heat exchange unit 141, the third electronic expansion valve 143, and the second indoor heat exchange unit 142 in sequence. When the constant temperature dehumidification or the temperature rise dehumidification is performed, the first indoor heat exchange unit 141 performs heat exchange between the refrigerant flowing through and the indoor air, the temperature of the refrigerant reaching the third electronic expansion valve 143 is reduced, the opening degree of the third electronic expansion valve 143 is adjusted, and the temperature of the refrigerant entering the second indoor heat exchange unit 141 is further reduced, that is, when the constant temperature dehumidification or the temperature rise dehumidification is performed, the second indoor heat exchange unit 142 is a low-temperature part, the indoor intake air achieves the effect of temperature reduction and dehumidification through heat exchange with the second heat exchange unit 142, and becomes cool air with low humidity, and then the temperature of the cool air can be raised through the first indoor heat exchange unit 141, so that the intake air temperature is close to or raised from the outlet air temperature, and thus the constant temperature dehumidification or the temperature rise dehumidification can be achieved.

Further, in the embodiment of the present invention, the two indoor heat exchange units in the indoor heat exchanger 14 are reasonably arranged, so as to avoid the phenomenon of mixing cold and hot air in the room, and achieve the effect of dehumidification at constant temperature or temperature rise more reasonably. As shown in fig. 2, the first indoor heat exchange unit 141 and the second indoor heat exchange unit 142 are disposed in parallel with each other, and are substantially in a parallel state, and a gap is provided between the first indoor heat exchange unit 141 and the second indoor heat exchange unit 142. Wherein, being parallel to each other through arranging first indoor heat exchange unit 141 and the indoor heat exchange unit 142 of second, can be so that heat exchange unit is bigger with the area of contact of air inlet, improves heat exchange efficiency to and, set up suitable clearance between two indoor heat exchange units, can guarantee the dehumidification effect and can avoid indoor cold and hot wind to mix again, reach better constant temperature dehumidification or the effect of intensification dehumidification.

As an example, the gap between the first indoor heat exchange unit 141 and the second indoor heat exchange unit 142 satisfies: the gap is more than or equal to 5mm and less than or equal to 10 mm. For example, the gap is identified by X in fig. 2, which may be 5mm or 7mm or 9mm or 10 mm. The gap X cannot be too large so as to avoid the influence of the mixing of cold and hot air in the room on the constant-temperature dehumidification or temperature rise dehumidification effect, and the gap X cannot be too small so as to easily reduce the dehumidification effect.

Based on the refrigerant circulation system of the above embodiments, a second aspect of the present invention provides an air conditioner.

As shown in fig. 3, the air conditioner 100 according to the embodiment of the present invention includes the refrigerant circulation system 1, the outdoor fan 16, the indoor fan 17, the first temperature sensor 2, the second temperature sensor 3, the third temperature sensor 4, the fourth temperature sensor 5, and the controller 6 according to the above embodiments. The outdoor fan 16 is provided corresponding to the outdoor heat exchanger 13, and the indoor fan 17 is provided corresponding to the indoor heat exchanger 14.

The first temperature sensor 2 is used for collecting indoor environment temperature, the first temperature sensor 2 is arranged on the indoor unit, and the detected indoor environment temperature is sent to the controller 6. As shown in fig. 1, a first inner panel sensor 1411 for sensing the temperature of the coil of the first indoor heat exchanging unit 141, or a second inner panel sensor 1421 for sensing the temperature of the second indoor heat exchanging unit 142 may be further provided.

The second temperature sensor 3 is used for collecting the outdoor environment temperature, and can be arranged on the outdoor unit.

The third temperature sensor 4 is used to collect the outlet air temperature of the indoor heat exchanger, for example, as shown in fig. 1, the third temperature sensor 4 may be disposed at the first indoor heat exchange unit 141 side to detect the outlet air temperature, and send the detected outlet air temperature to the controller 6.

The fourth temperature sensor 5 is used to collect the outdoor coil temperature, for example, as shown in fig. 1, the fourth temperature sensor 5 may be disposed on the coil of the outdoor heat exchanger 12 to detect the outdoor coil temperature and send the detected outdoor coil temperature to the controller 6.

As shown in fig. 1, an intake air temperature sensor 31 may be further provided for collecting an intake air temperature of the indoor heat exchanger, for example, as shown in fig. 1, the intake air temperature sensor 31 may be disposed at the side of the second indoor heat exchange unit 142 to detect an intake air temperature, and send the detected intake air temperature to the controller 6, and the controller 6 may determine whether to cool, maintain constant temperature or warm by the intake air temperature and the outlet air temperature.

The controller 6 is used for responding to a dehumidification control instruction, determining a target dehumidification mode according to the indoor environment temperature, and controlling the refrigerant circulating system according to the target dehumidification mode, the indoor environment temperature, the outdoor coil pipe temperature and the air outlet temperature, wherein the target dehumidification mode comprises a cooling dehumidification mode, a constant temperature dehumidification mode and a heating dehumidification mode.

Specifically, a dehumidification control instruction can be sent to the air conditioner through an air conditioner APP or a control panel on the remote controller or the mobile terminal, and the temperature is set, the controller 6 responds to the dehumidification control instruction, and determines a target dehumidification mode according to the real-time indoor environment temperature and the set temperature, for example, if the indoor environment temperature is greater than the set temperature, the cooling dehumidification mode is executed; if the indoor environment temperature is equal to the set temperature or the difference value of the indoor environment temperature and the set temperature is smaller than a preset tolerance value, executing a constant temperature dehumidification mode; and if the indoor environment temperature is lower than the set temperature, executing a heating dehumidification mode. Under different dehumidification modes, the frequency of the compressor, the rotating speed of the fan and the opening degree of each electronic expansion valve are controlled according to the indoor environment temperature, the outdoor coil temperature and the indoor air outlet temperature, so that the cooling dehumidification mode, the constant-temperature dehumidification mode or the heating dehumidification mode are realized.

According to the air conditioner 100 of the embodiment of the invention, by adopting the refrigerant circulation system 1 of the above embodiment, electric heating or refrigerant device addition is not needed, the cost is low, the refrigerant circulation system 1 is not limited by space and has wide application range, the controller 6 responds to the dehumidification control instruction and controls the refrigerant circulation system according to the target dehumidification mode, the indoor environment temperature, the outdoor coil temperature and the air outlet temperature, so that various dehumidification modes of the cooling dehumidification mode, the constant temperature dehumidification mode and the heating dehumidification mode can be realized, and different dehumidification requirements are met.

A method of controlling dehumidification of an air conditioner according to an embodiment of the third aspect of the present invention will be described below with reference to the accompanying drawings. The method for controlling the dehumidification of the air conditioner is based on the refrigerant circulating system of the embodiment.

Fig. 4 is a flowchart of a method of controlling dehumidification of an air conditioner according to an embodiment of the present invention, as shown in fig. 4, having at least steps S1-S4.

And S1, responding to the dehumidification control instruction, and acquiring the indoor environment temperature.

Specifically, the user can send a dehumidification control instruction to the air conditioner through the air conditioner APP or the control panel on the remote controller or the mobile terminal. The indoor environment temperature can be detected by a temperature sensor arranged on an indoor unit of the air conditioner and sent to a controller of the air conditioner, or other indoor equipment capable of acquiring the indoor environment temperature sends the detected indoor environment temperature to the air conditioner through a communication module.

And S2, determining a target dehumidification mode according to the indoor environment temperature.

Specifically, the user can set up dehumidification set temperature through the air conditioner APP on remote controller or the mobile terminal, compares real-time indoor environment temperature with dehumidification set temperature to confirm target dehumidification mode, target dehumidification mode include cooling dehumidification mode, constant temperature dehumidification mode and the mode that heaies up in the dehumidification mode.

In an embodiment, if it is determined that the indoor ambient temperature is greater than the dehumidification setting temperature, the target dehumidification mode is a cooling dehumidification mode; determining that the indoor environment temperature is equal to the dehumidification set temperature, and determining that the target dehumidification mode is a constant-temperature dehumidification mode; and if the indoor environment temperature is determined to be higher than the dehumidification set temperature, the target dehumidification mode is a heating dehumidification mode.

And S3, acquiring the outdoor environment temperature, the outdoor coil temperature and the air outlet temperature of the indoor heat exchanger.

And S4, controlling the refrigerant circulation system according to the target dehumidification mode, the indoor environment temperature, the outdoor coil pipe temperature and the air outlet temperature.

Specifically, when the temperature is reduced and the humidity is removed, the second electronic expansion valve is controlled to be fully closed, the third electronic expansion valve is controlled to be fully opened, and the air conditioner is controlled to operate according to a common dehumidification mode.

During constant-temperature dehumidification and temperature-rise dehumidification, the first electronic expansion valve is controlled to be fully opened, and the compressor frequency, the fan rotating speed and the opening degrees of the second electronic expansion valve and the third electronic expansion valve are adjusted according to the indoor environment temperature, the outdoor coil pipe temperature and the air outlet temperature, so that constant-temperature dehumidification or temperature-rise dehumidification is realized through the shunt pipeline and the two indoor heat exchange units as shown in the figure 1.

According to the method for controlling the dehumidification of the air conditioner, based on the refrigerant circulating system of the embodiment, an electric heating device is not needed to be started or a refrigerant device is not needed to be added, the cost is low, the refrigerant circulating system 1 is not limited by space and has a wide application range, the refrigerant circulating system is controlled according to a target dehumidification mode, an indoor environment temperature, an outdoor coil pipe temperature and an air outlet temperature, various dehumidification modes of a cooling dehumidification mode, a constant temperature dehumidification mode and a heating dehumidification mode can be achieved, and different dehumidification requirements are met.

The following describes the control of the air conditioner to achieve temperature-rise dehumidification, constant-temperature dehumidification and temperature-reduction dehumidification respectively.

In some embodiments, the target dehumidification mode is determined to be a warm dehumidification mode.

And controlling the first electronic expansion valve to be fully opened, and adjusting the opening degree of the second electronic expansion valve according to the outlet air temperature until the outlet air temperature is equal to the dehumidification set temperature, for example, if the outlet air temperature is always greater than the dehumidification set temperature, controlling the second electronic expansion valve to reduce the opening degree until the outlet air temperature is equal to the dehumidification set temperature, wherein the outlet air temperature is equal to the dehumidification set temperature and can be equal to the dehumidification set temperature or the difference between the two temperatures is within a set tolerance range. And adjusting the opening of the third electronic expansion valve according to the outlet air temperature, for example, if the outlet air temperature is lower than the dehumidification set temperature, controlling the opening of the third electronic expansion valve to be small, or if the outlet air temperature is equal to the dehumidification set temperature, controlling the opening of the third electronic expansion valve to be constant, or if the outlet air temperature is higher than the dehumidification set temperature, controlling the opening of the third electronic expansion valve to be increased.

And controlling the compressor to adjust to the first set frequency, and further adjusting the frequency of the compressor according to the outlet air temperature. For example, if the outlet air temperature is lower than the dehumidification set temperature, the frequency of the compressor is increased, if the outlet air temperature is equal to the dehumidification set temperature, the frequency of the compressor is maintained, and if the outlet air temperature is higher than the dehumidification set temperature, the frequency of the compressor is decreased. The first set frequency can be a frequency value set based on experience, and the frequency value is used as a basis to adjust the frequency of the compressor, so that the outlet air temperature can be equal to or close to the dehumidification set temperature more quickly, and the time for adjusting the frequency of the compressor is shortened.

And controlling the indoor fan according to the set indoor wind speed, and controlling the outdoor fan to operate at a minimum configuration gear, for example, the outdoor fan is configured with a first gear, a second gear and a third gear, wherein the rotating speeds of the first gear, the second gear and the third gear are sequentially increased, so that the outdoor fan is controlled to operate at the first gear, the dehumidification purpose can be achieved, heat dissipation can be realized, and the problem of temperature rise of an outer machine frequency conversion module is solved.

In some embodiments, the target dehumidification mode is determined to be a constant temperature dehumidification mode.

And controlling the first electronic expansion valve to be fully opened, controlling the second electronic expansion valve to reach a first preset opening degree, and further adjusting the opening degree of the second electronic expansion valve according to the air outlet temperature until the air outlet temperature reaches the dehumidification set temperature. For example, if the outlet air temperature is lower than the dehumidification set temperature, the second electronic expansion valve is controlled to increase the opening until the outlet air temperature reaches the dehumidification set temperature; and if the air outlet temperature is higher than the dehumidification set temperature, controlling the second electronic expansion valve to reduce the opening until the air outlet temperature reaches the dehumidification set temperature. For example, the second electronic expansion valve is controlled to open half of the opening first, if the subsequent outlet air temperature is always less than the dehumidification set temperature, the opening of the second electronic expansion valve is controlled to increase again until the outlet air temperature approaches the dehumidification set temperature, otherwise, if the subsequent outlet air temperature is always greater than the dehumidification set temperature, the opening of the second electronic expansion valve is controlled to decrease until the outlet air temperature approaches the dehumidification set temperature. And adjusting the opening degree of the third electronic expansion valve according to the outlet air temperature. For example, the outlet air temperature is lower than the dehumidification setting temperature, the opening degree of the third electronic expansion valve is controlled to be reduced, if the outlet air temperature is equal to the dehumidification setting temperature, the opening degree of the third electronic expansion valve is controlled to be kept unchanged, and if the outlet air temperature is higher than the dehumidification setting temperature, the opening degree of the third electronic expansion valve is controlled to be increased.

And controlling the compressor to adjust to a second set frequency, and further adjusting the frequency of the compressor according to the outlet air temperature. For example, if the outlet air temperature is lower than the dehumidification set temperature, the frequency of the compressor is increased, if the outlet air temperature is equal to the dehumidification set temperature, the frequency of the compressor is maintained, and if the outlet air temperature is higher than the dehumidification set temperature, the frequency of the compressor is decreased. The second set frequency can be a frequency value set based on experience, and the frequency value is used as a basis to adjust the frequency of the compressor, so that the outlet air temperature can be close to or equal to the dehumidification set temperature more quickly, and the time for adjusting the frequency of the compressor is shortened.

And controlling the indoor fan according to the set indoor wind speed, and controlling the outdoor fan to operate at the minimum configuration gear. For example, the outdoor fan is provided with a first gear, a second gear and a third gear, the rotating speed of the outdoor fan is sequentially increased, the outdoor fan is controlled to operate in the first gear, the dehumidification purpose can be achieved, heat dissipation can be achieved, and the problem of temperature rise of the outer machine frequency conversion module is solved.

In some embodiments, the target dehumidification mode is determined to be a reduced temperature dehumidification mode.

And controlling the second electronic expansion valve to be fully closed, controlling the third electronic expansion valve to be fully opened, and controlling the air conditioner to operate according to a common cooling and dehumidifying mode. For example, the degree of superheat is acquired, and the opening degree of the first electronic expansion valve is controlled in accordance with the degree of superheat. And controlling the opening degree of the first electronic expansion valve to be unchanged when the superheat degree is lower than a target value, controlling the opening degree of the first electronic expansion valve to be reduced when the superheat degree is equal to the target value, and controlling the opening degree of the first electronic expansion valve to be increased when the superheat degree is higher than the target value.

And calculating an initial compressor frequency based on the indoor ambient temperature and the outdoor coil temperature, and controlling the compressor to maintain the initial compressor frequency. And controlling the indoor fan according to the set indoor air speed, and controlling the rotating speed of the outdoor fan according to the outdoor environment temperature and the outdoor coil temperature.

For example, fig. 5 is a flowchart of a method for controlling dehumidification of an air conditioner according to an embodiment of the present invention, as shown in fig. 5, specifically including the following steps:

s100, a user selects a dehumidification mode and sets a dehumidification set temperature Ts.

S101, judging a target dehumidification mode according to the dehumidification set temperature Ts and the real-time indoor environment temperature Tr. If Tr > Ts, the process proceeds to step S102, if Tr is Ts, the process proceeds to step S104, and if Tr < Ts, the process proceeds to step S107.

And S102, starting a cooling and dehumidifying mode.

And S103, controlling the frequency of the compressor, the opening of the first electronic expansion valve, the rotating speed of the indoor fan and the rotating speed of the outdoor fan according to a normal refrigeration and dehumidification mode, controlling the second electronic expansion valve to be fully closed, and controlling the third electronic expansion valve to be fully opened. And returns to step S101.

And S104, starting a constant temperature dehumidification mode.

And S105, controlling the frequency of the compressor to be 30Hz, controlling the outdoor fan to run at a low wind level, controlling the indoor fan according to the rotating speed of the indoor fan set by a user, and controlling the first electronic expansion valve to be fully opened.

S106, controlling the second electronic expansion valve to be half-opened first, then adjusting the opening degree of the second electronic expansion valve according to the magnitude relation between the air outlet temperature and the dehumidification set temperature along with the frequency of the compressor and the opening degree of the third electronic expansion valve until the air outlet temperature is equal to the dehumidification set temperature, and returning to the step S101.

S107, the temperature-raising dehumidification mode is started.

And S108, controlling the frequency of the compressor to 55Hz, controlling the outdoor fan to run at a low gear, controlling the indoor fan according to the rotating speed of the indoor fan set by a user, and controlling the first electronic expansion valve to be fully opened.

And S109, controlling the second electronic expansion valve to be fully opened, and then adjusting the opening of the second electronic expansion valve according to the outlet air temperature and the dehumidification set temperature along with the frequency of the compressor and the opening of the third electronic expansion valve until the outlet air temperature is equal to the dehumidification set temperature. And returns to step S101.

In summary, the refrigerant circulation system and the air conditioner provided by the embodiment of the invention are based on the premise of not using a refrigerant heat dissipation device, the cost is low, the occupied space is small, a refrigerant (high-temperature) diversion pipeline of an exhaust outlet is introduced through a special pipeline arrangement mode, the refrigerant in the diversion pipeline is not subjected to heat dissipation by an outdoor heat exchanger and is converged with the refrigerant flowing through the outdoor heat exchanger normally to become a high-temperature medium-pressure refrigerant, and then the refrigerant enters an indoor evaporator, and the indoor heat exchanger adopts two indoor heat exchange units, so that various dehumidification modes of constant-temperature dehumidification, temperature rise dehumidification, whole-line cooling dehumidification and the like of the air conditioner can be realized, and different dehumidification requirements are met.

Embodiments of the present invention also provide a computer-readable storage medium having a computer program stored thereon, where the computer program is executed by a processor, and the method for controlling dehumidification of an air conditioner according to the above embodiments can be implemented.

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

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