阅读说明：本技术 压缩机的回液处理装置及空调器 (Liquid return processing device of compressor and air conditioner ) 是由 张亚国 张辉 于 2019-10-16 设计创作，主要内容包括：本发明公开了一种压缩机的回液处理装置及空调器,压缩机的吸气口串联至少一个气液分离器,回液处理装置包括：第一换热管段,第一换热管段设置在发热设备上且其内部的液态换热介质可与发热设备进行换热蒸发；第二换热管段,第二换热管段设置在任意一个气液分离器上且与第一换热管段连通,蒸发的换热介质通过第二换热管段将气液分离器中的液态冷媒气化后再冷凝回到第一换热管段。第一换热管段环抱设置在压缩机的电机绕组外侧,换热介质通过电磁阀进行循环。与现有技术相比,回液处理装置发挥作用对第二气液分离器中的液态冷媒进行加热使冷媒成为气态,有效地解决了回液问题；同时,换热介质为压缩机进行降温。(The invention discloses a liquid return processing device of a compressor and an air conditioner, wherein an air suction port of the compressor is connected with at least one gas-liquid separator in series, and the liquid return processing device comprises: the first heat exchange pipe section is arranged on the heating equipment, and a liquid heat exchange medium in the first heat exchange pipe section can exchange heat with the heating equipment to evaporate; and the second heat exchange tube section is arranged on any one gas-liquid separator and is communicated with the first heat exchange tube section, and the evaporated heat exchange medium is gasified and condensed back to the first heat exchange tube section after passing through the second heat exchange tube section. The first heat exchange tube section is arranged on the outer side of a motor winding of the compressor in an encircling mode, and heat exchange media circulate through the electromagnetic valve. Compared with the prior art, the liquid return processing device plays a role in heating the liquid refrigerant in the second gas-liquid separator to enable the refrigerant to become gaseous, so that the liquid return problem is effectively solved; meanwhile, the heat exchange medium cools the compressor.)

1. A liquid return processing device of a compressor, wherein a suction port of the compressor is connected with at least one gas-liquid separator in series, and the liquid return processing device is characterized by comprising:

the first heat exchange pipe section is arranged on the heating equipment, and a liquid heat exchange medium in the first heat exchange pipe section can exchange heat with the heating equipment to evaporate;

the second heat exchange tube section is arranged on any one of the gas-liquid separators and communicated with the first heat exchange tube section, and the evaporated heat exchange medium is gasified and condensed back to the first heat exchange tube section after passing through the second heat exchange tube section.

2. The returned liquid treatment device according to claim 1, wherein the first heat exchange tube section is located below the second heat exchange tube section.

3. The returned liquid treatment apparatus according to claim 1, wherein the heat generating device includes a compressor.

4. The returned liquid treatment device according to claim 3, wherein the first heat exchange pipe section is arranged around the outside of a motor winding of the compressor.

5. The fluid return processing device according to claim 1, further comprising: the detection device is used for detecting the liquid return condition of the compressor, the switch valve is connected with the first heat exchange pipe section and the second heat exchange pipe section, and the controller is used for receiving signals of the detection device and controlling the switch valve.

6. The liquid-returning processing device of claim 5, wherein the detecting device comprises a third temperature sensor and a pressure sensor arranged on the exhaust port of the compressor, the controller calculates a corresponding condensing temperature Ta according to the exhaust pressure Pa detected by the pressure sensor, and when the difference between the exhaust temperature T3 detected by the third temperature sensor and the condensing temperature is less than a first preset value b, the opening and closing valve is controlled to be opened, and the liquid-returning processing device starts to operate.

7. The liquid-returning processing device of claim 5, wherein when the suction port of the compressor is connected in series with a first gas-liquid separator and a second gas-liquid separator, and the refrigerant outlet of the second gas-liquid separator is communicated with the suction port of the compressor, the detecting device comprises a first temperature sensor disposed at the refrigerant outlet of the first gas-liquid separator and a second temperature sensor disposed at the refrigerant inlet of the second gas-liquid separator, and when the difference between the refrigerant temperature T1 detected by the first temperature sensor and the refrigerant temperature T2 detected by the second temperature sensor is smaller than a second preset value a, the opening and closing valve is controlled to be opened, and the liquid-returning processing device starts to operate.

8. The returned liquid treatment device according to claim 1, wherein a suction port of the compressor is connected in series with a first gas-liquid separator and a second gas-liquid separator, a refrigerant outlet of the second gas-liquid separator is communicated with the suction port of the compressor, and the second heat exchange pipe section is arranged at the bottom of the second gas-liquid separator.

9. The returned liquid treatment device according to claim 1, wherein the returned liquid treatment device is connected and fixed to the second gas-liquid separator and the heat-generating equipment.

10. An air conditioner characterized by comprising the returned liquid treatment apparatus as recited in any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of air conditioners, in particular to a liquid return processing device of a compressor and an air conditioner.

Background

The 'liquid return' in the air conditioning system means that after the system refrigerant is optimized in operation under certain working conditions, the refrigerant returns to the suction side of the compressor in a liquid state or a gas-liquid two-phase mode, so that the compressor has a liquid impact phenomenon; particularly, when the air conditioner defrosts, the defrosting effect of the system is seriously affected by excessive liquid refrigerant, and the control mode is complicated in the existing air conditioning system which mainly improves the phenomenon of liquid return by controlling the frequency of the compressor and the opening degree of the electronic expansion valve, so that the liquid return treatment device of the compressor is necessary to solve the problem of liquid return of the air conditioning system.

Disclosure of Invention

The invention provides a liquid return processing device of a compressor and an air conditioner, which effectively solve the problem of liquid return in the conventional air conditioning system.

The technical scheme of the invention is as follows: a liquid return processing device of a compressor, wherein a suction port of the compressor is connected with at least one gas-liquid separator in series, and the liquid return processing device is characterized by comprising: the first heat exchange pipe section is arranged on the heating equipment, and a liquid heat exchange medium in the first heat exchange pipe section can exchange heat with the heating equipment to evaporate; the second heat exchange tube section is arranged on any one of the gas-liquid separators and communicated with the first heat exchange tube section, and the evaporated heat exchange medium is gasified and condensed back to the first heat exchange tube section after passing through the second heat exchange tube section.

The first heat exchange tube section is positioned below the second heat exchange tube section.

The heat generating device includes a compressor.

The first heat exchange tube section is arranged on the outer side of the motor winding of the compressor in an encircling mode.

The liquid return processing device further comprises: the detection device is used for detecting the liquid return condition of the compressor, the switch valve is connected with the first heat exchange pipe section and the second heat exchange pipe section, and the controller is used for receiving signals of the detection device and controlling the switch valve.

The detection device comprises a third temperature sensor and a pressure sensor which are arranged on an exhaust port of the compressor, the controller calculates a corresponding condensation temperature Ta according to exhaust pressure Pa detected by the pressure sensor, and when a difference value obtained by subtracting the condensation temperature from exhaust temperature T3 detected by the third temperature sensor is smaller than a first preset value b, the switch valve is controlled to be opened, and the liquid return processing device starts to operate.

When the air suction port of the compressor is connected with the first gas-liquid separator and the second gas-liquid separator in series, and the refrigerant outlet of the second gas-liquid separator is communicated with the air suction port of the compressor, the detection device comprises a first temperature sensor arranged at the refrigerant outlet of the first gas-liquid separator and a second temperature sensor arranged at the refrigerant inlet of the second gas-liquid separator, and when the difference value obtained by subtracting the refrigerant temperature T2 detected by the second temperature sensor from the refrigerant temperature T1 detected by the first temperature sensor is smaller than a second preset value a, the switch valve is controlled to be opened, and the liquid return processing device starts to operate.

The suction port of the compressor is connected with the first gas-liquid separator and the second gas-liquid separator in series, the refrigerant outlet of the second gas-liquid separator is communicated with the suction port of the compressor, and the second heat exchange tube section is arranged at the bottom of the second gas-liquid separator.

And the liquid return processing device is connected and fixed on the second gas-liquid separator and the heating equipment.

An air conditioner comprises the liquid return treatment device.

Compared with the prior art, the invention has the advantages that: when liquid refrigerant exists in the second gas-liquid separator, the liquid-returning processing device plays a role, a heat exchange medium is condensed at the outer side of the second gas-liquid separator to release heat, the liquid refrigerant in the second gas-liquid separator is heated, the refrigerant entering the air suction side of the compressor is changed into gas, and the problem of liquid returning in the existing air-conditioning system is effectively solved; meanwhile, the heat exchange medium is evaporated in the first heat exchange pipe section on the outer side of the heating equipment (such as a compressor) to absorb heat in the heating equipment, so that the purpose of cooling the heating equipment is achieved, the frequency limitation of a unit caused by overhigh temperature rise of the heating equipment is prevented, and the reliability of the whole machine is greatly improved.

Drawings

FIG. 1 is a schematic three-dimensional structure of a liquid-returning treatment apparatus and a compressor according to the present invention;

FIG. 2 is a schematic diagram showing the installation structure of a liquid-returning treatment apparatus in one embodiment of the present invention;

fig. 3 is a schematic diagram showing the installation structure of a liquid-returning processing device in another embodiment of the present invention.

Detailed Description

The principles and construction of the present invention will be described in detail below with reference to the drawings and examples.

The invention provides a liquid return processing device of a compressor, which comprises a first heat exchange pipe section 20 and a second heat exchange pipe section 10, wherein the first heat exchange pipe section 20 is arranged on heating equipment (such as a compressor), a liquid heat exchange medium in the first heat exchange pipe section 20 can exchange heat with the heating equipment for evaporation, and the second heat exchange pipe section 10 is arranged on any gas-liquid separator, and a heat exchange medium in the second heat exchange pipe section 10 can exchange heat with the gas-liquid separator for condensation.

It should be noted that the first heat exchange tube section 20 is located below the second heat exchange tube section 10, so that the liquid heat exchange medium always flows to the first heat exchange tube section to exchange heat with the heat generating equipment for evaporation, and the gaseous heat exchange medium always flows to the second heat exchange tube section 10 to exchange heat with the gas-liquid separator for condensation.

Preferably, R22 refrigerant is selected as the heat exchange medium.

Preferably, the first heat exchange tube section 20 is arranged around the outside of the compressor 2, outside the motor windings.

The liquid return processing device further comprises an electromagnetic valve 30, the electromagnetic valve 30 is arranged on a flow path of the heat exchange medium of the liquid return processing device, and is particularly connected between the second heat exchange pipe section 10 and the first heat exchange pipe section 20, and the electromagnetic valve 30 is opened to control the whole heat exchange medium to circularly flow.

Specifically, as shown in fig. 2, in an embodiment, the inflow end of the pipe 12 is communicated with the first gas-liquid separator 13, and if the liquid refrigerant flows out of the first gas-liquid separator 13, the temperature of the refrigerant can be detected at the inflow end and the outflow end of the pipe 12 respectively to determine whether the liquid return phenomenon exists in the compressor. The second gas-liquid separator 1 further comprises a refrigerant inlet 11, the refrigerant inlet 11 is communicated with a refrigerant pipeline 12 at one end, one end of the pipeline 12 is an inflow end of the refrigerant, the other end of the pipeline 12 is an outflow end of the refrigerant, the outflow end of the refrigerant of the pipeline 12 is communicated with the refrigerant inlet 11 of the second gas-liquid separator 1, the refrigerant flows into the second gas-liquid separator 1 through the pipeline 12, a first temperature sensor 121 is arranged at the inflow end of the pipeline 12 (refrigerant outlet of the first gas-liquid separator 13), a second temperature sensor 122 is arranged at the outflow end of the pipeline 12 (refrigerant inlet of the second gas-liquid separator 1), the first temperature sensor 121 and the second temperature sensor 122 respectively detect the temperature of the refrigerant of the pipeline 12, the first temperature sensor and the second temperature sensor are connected with a controller, and the controller controls the electromagnetic valve 30 to be opened or closed according to the temperature values detected by the first temperature sensor and the second temperature sensor, thereby controlling whether to start the liquid returning treatment device.

As shown in fig. 3, in another embodiment, a third temperature sensor 21 and a pressure sensor 22 are disposed at the exhaust port of the compressor 2, the third temperature sensor 21 is used for detecting an actual temperature T3 of the refrigerant exiting from the compressor 2, the control system calculates a condensation temperature Ta of the refrigerant corresponding to the exhaust pressure Pa, and the controller controls whether to start the liquid-returning processing device according to T3 and Ta.

Specifically, the invention also provides a control method of the liquid return processing device of the compressor, which comprises the following steps: and detecting the exhaust pressure Pa and the exhaust temperature T3 of the compressor 2, calculating the corresponding condensation temperature Ta according to the exhaust pressure Pa, and judging that the second gas-liquid separator contains liquid refrigerant when T3-Ta is less than a first preset value b.

Preferably, the first preset value b ranges from 5 to 10.

As shown in fig. 1, when the refrigerant in the second gas-liquid separator 1 is introduced from the first gas-liquid separator 13, the temperature T1 of the refrigerant at the refrigerant outlet of the first gas-liquid separator 13 and the temperature T2 of the refrigerant at the refrigerant inlet of the second gas-liquid separator 1 are detected, and when T1-T2 < the second preset value a, it is determined that the liquid return phenomenon exists in the compressor.

Preferably, the second preset value a ranges from 2 to 4.

When the system judges that the liquid return phenomenon exists in the compressor 2, the controller controls the electromagnetic valve 30 to be opened, the liquid return processing device starts to work, and the heat exchange medium starts to circulate in the liquid return processing device.

Preferably, the second heat exchange section 10 is arranged at the bottom of the second gas-liquid separator 1, so arranged that: when the unit has liquid refrigerant to reach in the second vapour and liquid separator 1, liquid refrigerant can be stored in the bottom region of second vapour and liquid separator 1 by priority, and accessible heat transfer medium condensation that can be better is exothermic and is heated second vapour and liquid separator 1 is inside, makes liquid refrigerant evaporation gasification.

It should be noted that: the liquid return processing device is independently arranged, namely the liquid return processing device can be designed according to the specific shape, size, structure and the like of the compressor and is installed on the compressor and the second gas-liquid separator 1 through fixing means such as mechanical matching and the like, so that the liquid return processing device provided by the invention can be used as a fixing structure to reinforce the compressor 2 and the second gas-liquid separator 1 when being fixed on the compressor 2 and the second gas-liquid separator 1, the rigidity of the whole machine is improved, and the noise is optimized.

Specifically, as shown in fig. 1, the second heat exchange pipe section 10 is disposed around the outside of the second gas-liquid separator 1, and the first heat exchange pipe section 20 is also disposed around the outside of the casing of the compressor 2, which is similar to a connection structure as a whole.

In other embodiments, the liquid-returning treatment device may be integrally provided on the compressor 2.

The working principle of the liquid return treatment device is as follows: when the system judges that the refrigerant state in the compressor flow path is a liquid state or a gas-liquid two-phase state; the controller controls the electromagnetic valve 30 to be opened, the liquid-returning treatment device is operated, the heat exchange medium circulates in the second heat exchange tube section 10 and the first heat exchange tube section 20, when the heat exchange medium circulates in the first heat exchange tube section 20, because the winding generates heat when the compressor 2 works, the heat exchange medium absorbs the heat of the compressor and evaporates and converts the heat into a gaseous state, the gaseous heat exchange medium flows to the second heat exchange pipe section 10 at the outer side of the second gas-liquid separator 1 and exchanges heat with the refrigerant in the second gas-liquid separator 1, the gaseous heat exchange medium releases heat and is condensed into liquid, the refrigerant in the second gas-liquid separator 1 absorbs heat and is converted from the liquid state into the gaseous state, the refrigerant entering the compressor 2 from the second gas-liquid separator 1 is guaranteed to be in the gaseous state, and the problem of liquid return in the existing air conditioning system is effectively solved.

Meanwhile, the heat exchange medium is evaporated in the first heat exchange pipe section 20 on the outer side of the compressor 2 to absorb heat in the heating equipment, so that the purpose of cooling the heating equipment is achieved, the frequency limitation of the unit caused by overhigh temperature rise of the compressor 2 is prevented, and the reliability of the whole machine is greatly improved.

The invention also provides an air conditioner which comprises the liquid return processing device.

The above specific embodiments are only intended to illustrate the inventive concept and many modifications and variations may be made by those skilled in the art within the spirit of the invention, which are included within the scope of the invention.