Compressor assembly, air conditioning system and control method of air conditioning system

Abstract

The invention provides a compressor assembly, an air conditioning system and a control method of the air conditioning system. The compressor assembly comprises a compressor body and a liquid storage device arranged on the compressor body, and the liquid storage device comprises a barrel body and a liquid storage cavity; one end of the air inlet pipe is located in the liquid storage cavity, the other end of the air inlet pipe communicates with the compressor body, and an oil return hole is formed in the side wall, located in the liquid storage cavity, of the air inlet pipe; fluid in the liquid storage cavity can flow back into the compressor body through the oil return hole; the first end of the bypass pipe is communicated with the liquid storage cavity, and the second end of the bypass pipe is communicated with the air inlet pipe located outside the liquid storage cavity; the adjusting device is positioned between the first end and the second end of the bypass pipe; the controller is used for controlling the opening degree of the adjusting device so as to adjust the flow of the fluid flowing back into the compressor body. The adjusting device adjusts the backflow amount of the refrigerant of the bypass pipe in different working states according to the control strategy, and the energy efficiency of the air conditioning system is improved.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration technology, and in particular to a compressor assembly, an air conditioning system and a control method thereof. Background Art

[0002] The air inlet pipe of the compressor reservoir of a traditional household air conditioner is provided with a fixed oil return hole, which can realize the functions of oil and liquid return of the compressor. However, through experimental research, it is found that the requirements for the oil return hole of the reservoir in different working states of the air-conditioning system are different, that is, a fixed oil return hole cannot meet the overall performance requirements of the air-conditioning system. Therefore, in order to adapt to the requirements of the oil return hole of the reservoir in different working states of the air-conditioning system, many design schemes have been produced, including: multiple oil return hole scheme, mechanically adjustable oil return hole scheme. However, the above schemes cannot realize real-time adjustment of the dynamic operation cycle of the air-conditioning system, and cannot automatically control the return liquid flow rate under various working states of the air-conditioning system. Summary of the invention

[0003] In view of the problems in the prior art, the purpose of the present invention is to provide a compressor assembly, an air-conditioning system and a control method thereof, wherein the compressor assembly can automatically control and adjust the return liquid flow according to the working state of the air-conditioning system to improve the energy efficiency of the air-conditioning system.

[0004] An embodiment of the present invention provides a compressor assembly, comprising a compressor body and a liquid reservoir, wherein the liquid reservoir is arranged on the compressor body, and the liquid reservoir comprises:

[0005] A cylinder body, including a liquid storage chamber;

[0006] An air intake pipe, one end of which is located in the liquid storage cavity, and the other end of which is connected to the compressor body, and an oil return hole is provided on the side wall of the air intake pipe located in the liquid storage cavity; the fluid in the liquid storage cavity can flow into the interior of the compressor body through the oil return hole;

[0007] A bypass pipe, wherein a first end of the bypass pipe is connected to the liquid storage chamber, and a second end of the bypass pipe is connected to the air intake pipe outside the liquid storage chamber;

[0008] A regulating device is located between the first end and the second end of the bypass pipe, and the fluid in the liquid storage chamber can flow to the intake pipe through the regulating device and enter the interior of the compressor body;

[0009] The controller is used to control the opening of the regulating device to adjust the flow rate of the fluid flowing into the compressor body.

[0010] In some embodiments, the regulating device is an electronic expansion valve.

[0011] In some embodiments, a height of the first end of the bypass pipe is higher than a height of the oil return hole.

[0012] In some embodiments, the number of the oil return holes is greater than or equal to one.

[0013] An embodiment of the present invention further provides an air conditioning system, comprising the compressor assembly as described above.

[0014] In some embodiments, it also includes a first heat exchanger, a second heat exchanger, a four-way valve and a throttling device, the first end of the four-way valve is connected to the exhaust port of the compressor body, the second end of the four-way valve is connected to the air inlet of the liquid reservoir, the third end of the four-way valve is connected to the first end of the first heat exchanger, and the fourth end of the four-way valve is connected to the first end of the second heat exchanger; the second end of the first heat exchanger is connected to the second end of the second heat exchanger through the throttling device.

[0015] In some embodiments, a first temperature sensor is further included, the first temperature sensor being disposed between the exhaust port of the compressor body and the first end of the four-way valve, and being used to detect a first temperature of the refrigerant between the exhaust port of the compressor body and the first end of the four-way valve and transmit the first temperature to the controller;

[0016] When it is detected that the air conditioning system is in a first state, the controller controls the opening degree of the regulating device according to a comparison between the first temperature and a target first temperature.

[0017] In some embodiments, a second temperature sensor is further included, located between the second end of the second heat exchanger and the throttling device, for detecting a second temperature of the refrigerant between the second end of the second heat exchanger and the throttling device and transmitting the second temperature to the controller;

[0018] When it is detected that the air conditioning system is in the second state, the controller controls the opening degree of the adjustment device according to a comparison between a temperature difference between the first temperature and the second temperature and a target temperature difference.

[0019] The embodiment of the present invention further provides a control method of an air conditioning system, which is used to control the air conditioning system as described above. The control method comprises the following steps:

[0020] Detecting the current working status of the air conditioning system;

[0021] When it is detected that the air conditioning system is in a first state, the controller controls the opening degree of the regulating device according to a comparison between the first temperature and the target first temperature.

[0022] The embodiment of the present invention further provides a control method of an air conditioning system, which is used to control the air conditioning system as described above. The control method comprises the following steps:

[0023] Detecting the current working status of the air conditioning system;

[0024] When it is detected that the air conditioning system is in the second state, the controller controls the opening degree of the adjustment device according to a comparison between a temperature difference between the first temperature and the second temperature and a target temperature difference.

[0025] The compressor assembly, air conditioning system and control method thereof provided by the present invention have the following advantages:

[0026] The present invention provides a bypass pipe and a regulating device on the liquid storage device. The controller responds to the indication of the air-conditioning system under different working conditions and controls the opening of the regulating device, thereby automatically adjusting the flow rate of the refrigerant flowing into the compressor body under different working conditions, so as to improve the operating efficiency of the air-conditioning system under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Other features, objectives and advantages of the present invention will become more apparent from a reading of the detailed description of non-limiting embodiments made with reference to the following accompanying drawings.

[0028] Figure 1 is a schematic diagram of an air conditioning system according to an embodiment of the present invention;

[0029] Figure 2 is a schematic diagram of a liquid reservoir according to an embodiment of the present invention;

[0030] Figure 3 is a flow chart of a control method of an air conditioning system according to an embodiment of the present invention.

[0031] Reference numerals:

[0032] 10 Compressor body

[0033] 20 Liquid reservoir 25 Controller

[0034] 21 cylinder 30 first heat exchanger

[0035] 211 liquid storage chamber 40 second heat exchanger

[0036] 22 Inlet pipe 50 Four-way valve

[0037] 221 Oil return hole 60 Throttling device

[0038] 23 Bypass pipe 71 First temperature sensor

[0039] 24 Adjustment device 72 Second temperature sensor DETAILED DESCRIPTION

[0040] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. In the figures, the same reference numerals represent the same or similar structures, and thus their repeated description will be omitted. "or" and "or" in the specification may both mean "and" or "or".

[0041] Figure 1 A schematic diagram of an air conditioning system provided by an embodiment of the present invention is shown; Figure 2 FIG. 2 shows a schematic diagram of a liquid storage device provided by an embodiment of the present invention. Figure 1 and Figure 2 As shown, the embodiment of the present invention provides a compressor assembly, including a compressor body 10 and a liquid reservoir 20, the liquid reservoir 20 is arranged on the compressor body 10, and the liquid reservoir 20 includes: a cylinder 21, including a liquid storage cavity 211; an air intake pipe 22, one end of the air intake pipe 22 is located in the liquid storage cavity 211, and the other end of the air intake pipe 22 is connected to the compressor body 10; a side wall of the air intake pipe 22 located in the liquid storage cavity 211 is provided with an oil return hole 221, and the fluid in the liquid storage cavity 211 can flow back to the compressor through the oil return hole 221 The inside of the compressor body 10; a bypass pipe 23, the first end of which is connected to the liquid storage chamber 211, and the second end of which is connected to the intake pipe 22 located outside the liquid storage chamber 211; a regulating device 24, located between the first end and the second end of the bypass pipe 23, so that the fluid in the liquid storage chamber 211 can flow to the intake pipe 22 through the regulating device 24 and enter the inside of the compressor body 10; a controller 25, used to control the opening of the regulating device 24, and then adjust the flow rate of the fluid flowing back to the inside of the compressor body 10.

[0042] The present invention automatically controls the opening of the regulating device 24 under different working conditions by providing the regulating device 24 and the bypass pipe 23, thereby matching the actual fluid flow with the fluid flow required under different working conditions, thereby improving the energy efficiency of the air conditioning system.

[0043] In some embodiments, the regulating device 24 is an electronic expansion valve. By setting the opening of the electronic expansion valve under different working conditions, the fluid flow rate flowing into the compressor body 10 is adjusted to match the refrigerant flow rate required under different working conditions, thereby improving the energy efficiency of the air conditioning system.

[0044] In some embodiments, the number of the oil return holes 221 is greater than or equal to 1. Figure 2As shown, in this embodiment, the number of the oil return hole 221 is set to one. In other embodiments, the number of the oil return holes 221 can be 2, 3 or 4, etc.; multiple oil return holes 221 are set on the outer wall of the intake pipe 22 at different heights.

[0045] Please continue reading Figure 2 The height between the first end of the bypass pipe 23 and the second end thereof is h1, and the distance between the oil return hole and the second end of the bypass pipe 23 is h2, h1>h2, therefore, the height of the first end of the bypass pipe 23 is higher than the height of the oil return hole 221.

[0046] Please continue reading Figure 1 , an embodiment of the present invention provides an air conditioning system, comprising the compressor assembly as described above.

[0047] Specifically, the air-conditioning system also includes a first heat exchanger 30, a second heat exchanger 40, a four-way valve 50 and a throttling device 60. The first end of the four-way valve 50 is connected to the exhaust port of the compressor body 10, the second end of the four-way valve 50 is connected to the air inlet of the liquid reservoir 20, the third end of the four-way valve 50 is connected to the first end of the first heat exchanger 30, and the fourth end of the four-way valve 50 is connected to the first end of the second heat exchanger 40; the second end of the first heat exchanger 30 is connected to the second end of the second heat exchanger 40 through the throttling device 60.

[0048] When the first heat exchanger 30 is outdoors and the second heat exchanger 40 is indoors, when the second end of the four-way valve 50 is controlled to be connected to the third end, and the first end is connected to the fourth end, the air-conditioning system realizes the heating function; when the first end of the four-way valve 50 is controlled to be connected to the third end, and the second end is connected to the fourth end, the air-conditioning system realizes the cooling function.

[0049] In some embodiments, the compressor assembly further includes a first temperature sensor 71, which is disposed between the exhaust port of the compressor body 10 and the first end of the four-way valve 50, and is used to detect a first temperature T1 of the refrigerant between the exhaust port of the compressor body 10 and the first end of the four-way valve 50, and transmit the first temperature T1 to the controller 25;

[0050] When it is detected that the air conditioning system is in the first state, the controller 25 controls the opening degree of the adjustment device 24 according to the comparison between the first temperature T1 and the target first temperature T1 ′.

[0051] The first state here is the working state of the air conditioning system under non-frosting conditions.

[0052] In the first state, the first temperature T1 of the refrigerant is the exhaust temperature of the compressor body 10. The controller compares the exhaust temperature of the compressor body 10 with the target first temperature T1' and obtains a corresponding control signal through a predetermined algorithm, transmits the data to the adjustment device 24, and adjusts the opening to control the exhaust temperature of the compressor body 10. It should be noted that the target first temperature T1' can be set according to actual needs, and the embodiment of the present invention does not impose specific restrictions.

[0053] In other embodiments, the air conditioning system further includes a second temperature sensor 72, located between the second end of the second heat exchanger 40 and the throttling device 60, for detecting a second temperature of the refrigerant between the second end of the second heat exchanger 40 and the throttling device 60, and transmitting the second temperature to the controller 25;

[0054] The second state here is the working state of the air conditioning system under frosting conditions.

[0055] In the second state, the first temperature T1 of the refrigerant is the exhaust temperature of the compressor body 10. The second temperature T2 of the refrigerant is the outlet temperature of the refrigerant after passing through the second heat exchanger (the condenser in this case). When it is detected that the air conditioning system is in the second state, the controller 25 controls the opening of the regulating device 24 according to the comparison of the temperature difference ΔT between the first temperature T1 and the second temperature T2 and the target temperature difference ΔT'.

[0056] It should be noted that the target temperature difference ΔT′ here can be set according to actual needs, and the embodiment of the present invention does not make any specific limitation.

[0057] The conditions for adjusting the opening of the regulating device 24 are not limited to the above-mentioned temperature detection method. Other data parameters that can reflect different working conditions (such as evaporator outlet status, etc.) can also be used as a control strategy for the opening of the air-conditioning system to control the regulating device 24. The present invention does not impose any restrictions on this.

[0058] like Figure 3 As shown, an embodiment of the present invention further provides a control method of an air conditioning system, which is used to control the air conditioning system as described above, and the control method comprises the following steps:

[0059] S100: Detecting the current working status of the air conditioning system;

[0060] S200: When it is detected that the air conditioning system is in the first state, the controller 25 controls the opening degree of the adjustment device 24 according to the comparison between the first temperature T1 and the target first temperature T1'.

[0061] S300: When it is detected that the air conditioning system is in the second state, the controller 25 controls the opening degree of the adjustment device 24 according to the comparison between the temperature difference ΔT between the first temperature T1 and the second temperature T2 and the target temperature difference ΔT′.

[0062] In summary, the compressor assembly, air conditioning system and control method thereof provided by the present invention have the following advantages:

[0063] The present invention arranges a bypass pipe and a regulating device on a liquid storage device, and a controller responds to indications of the air-conditioning system under different working conditions to control the opening of the regulating device, thereby automatically adjusting the fluid flow from the bypass pipe into the compressor body under different working conditions, so as to improve the operating efficiency of the air-conditioning system under different working conditions.

[0064] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A compressor assembly, characterized in that: The invention comprises a compressor body and a liquid reservoir, wherein the liquid reservoir is arranged on the compressor body, and the liquid reservoir comprises: A cylinder body, including a liquid storage chamber; An air intake pipe, one end of which is located in the liquid storage cavity, and the other end of which is connected to the compressor body, and an oil return hole is provided on the side wall of the air intake pipe located in the liquid storage cavity; the fluid in the liquid storage cavity can flow back to the inside of the compressor body through the oil return hole; A bypass pipe, wherein a first end of the bypass pipe is connected to the liquid storage chamber, and a second end of the bypass pipe is connected to the air intake pipe outside the liquid storage chamber; a regulating device, located between the first end and the second end of the bypass pipe; The controller is used to control the opening of the regulating device to adjust the flow rate of the fluid flowing back to the compressor body.

2. The compressor assembly according to claim 1, characterized in that The regulating device is an electronic expansion valve.

3. The compressor assembly according to claim 1, characterized in that The height of the first end of the bypass pipe is higher than the height of the oil return hole.

4. The compressor assembly according to claim 1, characterized in that The number of the oil return holes is greater than or equal to one.

5. An air conditioning system, characterized in that: Comprising a compressor assembly as claimed in any one of claims 1 to 4.

6. The air conditioning system according to claim 5, characterized in that: It also includes a first heat exchanger, a second heat exchanger, a four-way valve and a throttling device, wherein the first end of the four-way valve is connected to the exhaust port of the compressor body, the second end of the four-way valve is connected to the air inlet of the liquid reservoir, the third end of the four-way valve is connected to the first end of the first heat exchanger, and the fourth end of the four-way valve is connected to the first end of the second heat exchanger; the second end of the first heat exchanger is connected to the second end of the second heat exchanger through the throttling device.

7. The air conditioning system according to claim 6, characterized in that: Also includes a first temperature sensor, the first temperature sensor is disposed between the exhaust port of the compressor body and the first end of the four-way valve, and is used to detect a first temperature of the refrigerant between the exhaust port of the compressor body and the first end of the four-way valve, and transmit the first temperature to the controller; When it is detected that the air conditioning system is in a first state, the controller controls the opening degree of the regulating device according to a comparison between the first temperature and a target first temperature.

8. The air conditioning system according to claim 7, characterized in that: Also included is a second temperature sensor, located between the second end of the second heat exchanger and the throttling device, for detecting a second temperature of the refrigerant between the second end of the second heat exchanger and the throttling device, and transmitting the second temperature to the controller; When it is detected that the air conditioning system is in the second state, the controller controls the opening degree of the adjustment device according to a comparison between a temperature difference between the first temperature and the second temperature and a target temperature difference.

9. A method for controlling an air conditioning system, characterized in that: For controlling the air conditioning system as claimed in claim 7, the control method comprises the following steps: Detecting the current working status of the air conditioning system; When it is detected that the air conditioning system is in a first state, the controller controls the opening degree of the regulating device according to a comparison between the first temperature and the target first temperature.

10. A method for controlling an air conditioning system, characterized in that: For controlling the air conditioning system as claimed in claim 8, the control method comprises the following steps: Detecting the current working status of the air conditioning system; When it is detected that the air conditioning system is in the second state, the controller controls the opening degree of the adjustment device according to a comparison between a temperature difference between the first temperature and the second temperature and a target temperature difference.

Images