Compressor components, air conditioning systems and their control methods

Abstract

This invention provides a compressor assembly, an air conditioning system, and a control method thereof. The compressor assembly includes a compressor body and a liquid receiver disposed on the compressor body. The liquid receiver includes: a cylinder containing a liquid storage chamber; an inlet pipe, one end of which is located within the liquid storage chamber, and the other end of which is connected to the compressor body; a return oil hole is provided on the side wall of the inlet pipe located within the liquid storage chamber; fluid in the liquid storage chamber can flow back to the compressor body through the return oil hole; a bypass pipe, one end of which is connected to the liquid storage chamber, and the second end of which is connected to the inlet pipe located outside the liquid storage chamber; a regulating device located between the first and second ends of the bypass pipe; and a controller for controlling the opening degree of the regulating device to regulate the flow rate of fluid returning to the compressor body. The regulating device of this invention regulates the refrigerant return flow rate of the bypass pipe under different operating conditions according to a control strategy, thereby improving the energy efficiency of the air conditioning system.

Description

Technical Field

[0001] This invention relates to the field of refrigeration technology, specifically to a compressor assembly, an air conditioning system, and a control method thereof. Background Technology

[0002] Traditional household air conditioners have a fixed oil return port on the intake pipe of the compressor's receiver-operated liquid receiver, enabling the return of both oil and liquid from the compressor. However, experimental research has revealed that the demand for this oil return port varies depending on the operating state of the air conditioning system; a single fixed port cannot meet the overall performance requirements of the system. Therefore, to adapt to the different operating conditions of the air conditioning system, various design solutions have been developed, including multi-port solutions and mechanically adjustable ports. However, these solutions cannot achieve real-time adjustment during the dynamic operating cycle of the air conditioning system, nor can they automatically regulate the return flow rate under different operating conditions. Summary of the Invention

[0003] To address the problems in the prior art, the present invention aims to provide a compressor assembly, an air conditioning system, and a control method thereof. The compressor assembly can automatically control and adjust the return liquid flow according to the working state of the air conditioning system, so as to improve the energy efficiency of the air conditioning system.

[0004] This invention provides a compressor assembly, including a compressor body and a liquid receiver, wherein the liquid receiver is disposed on the compressor body and includes:

[0005] The cylindrical body includes a liquid storage chamber;

[0006] An intake pipe is provided, one end of which is located in the liquid storage chamber and the other end of which is connected to the compressor body. An oil return hole is provided on the side wall of the intake pipe located in the liquid storage chamber. The fluid in the liquid storage chamber can flow to the inside of the compressor body through the oil return hole.

[0007] A bypass pipe, the first end of which is connected to the liquid storage chamber, and the second end of which is connected to the air inlet pipe located outside the liquid storage chamber;

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

[0009] A controller is used to control the opening degree of the regulating device in order to regulate the flow rate of fluid flowing into the compressor body.

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

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

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

[0013] This invention also provides an air conditioning system, including the compressor assembly described above.

[0014] In some embodiments, the system further 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 inlet of the liquid receiver, 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 ends of the first heat exchanger and the second ends of the second heat exchanger are connected through the throttling device.

[0015] In some embodiments, a first temperature sensor is further included, which is placed between the exhaust port of the compressor body and the first end of the four-way valve 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 the air conditioning system is detected to be in the first state, the controller controls the opening degree of the regulating device based on the comparison between the first temperature and the 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 the 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 the air conditioning system is detected to be in the second state, the controller controls the opening degree of the regulating device based on the comparison between the temperature difference between the first temperature and the second temperature and the target temperature difference.

[0019] This invention also provides a control method for an air conditioning system, used to control the air conditioning system described above, the control method comprising the following steps:

[0020] Detect the current operating status of the air conditioning system;

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

[0022] This invention also provides a control method for an air conditioning system, used to control the air conditioning system described above, the control method comprising the following steps:

[0023] Detect the current operating status of the air conditioning system;

[0024] When the air conditioning system is detected to be in the second state, the controller controls the opening degree of the regulating device based on the comparison between the temperature difference between the first temperature and the second temperature and the target temperature difference.

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

[0026] This invention improves the operating efficiency of the air conditioning system by setting a bypass pipe and a regulating device on the liquid receiver, and by controlling the opening degree of the regulating device in response to the indication of the air conditioning system under different operating conditions. Attached Figure Description

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

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

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

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

[0031] Figure label:

[0032] 10 Compressor body

[0033] 20 Liquid reservoir 25 Controller

[0034] 21 Shell 30 First heat exchanger

[0035] 211 Liquid storage chamber 40 Second heat exchanger

[0036] 22 Intake pipe 50 Four-way valve

[0037] 221 Oil return hole 60 Throttling device

[0038] 23 Bypass tube 71 First temperature sensor

[0039] 24 Adjustment device 72 Second temperature sensor Detailed Implementation

[0040] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted. The words “or” and “or” in the specification may mean “and” or “or”.

[0041] Figure 1 A schematic diagram of an air conditioning system provided in an embodiment of the present invention is shown; Figure 2 A schematic diagram of a liquid reservoir according to an embodiment of the present invention is shown. Figure 1 and Figure 2 As shown, this embodiment of the invention provides a compressor assembly, including a compressor body 10 and a liquid receiver 20. The liquid receiver 20 is disposed on the compressor body 10 and includes: a cylinder 21, including a liquid receiving chamber 211; an inlet pipe 22, one end of which is located inside the liquid receiving chamber 211, and the other end of which is connected to the compressor body 10; an oil return hole 221 is provided on the side wall of the inlet pipe 22 located inside the liquid receiving chamber 211, so that the fluid in the liquid receiving chamber 211 can flow back to the compressor through the oil return hole 221. Inside the main 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 air inlet pipe 22 located outside the liquid storage chamber 211; a regulating device 24, located between the first and second ends of the bypass pipe 23, so that the fluid in the liquid storage chamber 211 can flow through the regulating device 24 to the air inlet pipe 22 and enter the interior of the compressor main body 10; and a controller 25, used to control the opening of the regulating device 24, thereby regulating the flow rate of the fluid returning to the interior of the compressor main body 10.

[0042] The present invention automatically controls the opening degree of the regulating device 24 under different working conditions by setting up the regulating device 24 and the bypass pipe 23, thereby matching the actual fluid flow rate with the fluid flow rate required under different working conditions and 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 degree of the electronic expansion valve under different operating conditions, the flow rate of fluid flowing into the compressor body 10 is adjusted to match the required refrigerant flow rate under different operating conditions, thereby improving the energy efficiency of the air conditioning system.

[0044] In some embodiments, the number of oil return holes 221 is greater than or equal to one. For example... Figure 2As shown, in this embodiment, the number of oil return holes 221 is set to one. In other embodiments, the number of oil return holes 221 may be two, three, or four, etc.; multiple oil return holes 221 are arranged at different heights on the outer wall of the intake pipe 22.

[0045] Please continue reading. Figure 2 The distance between the first end of the bypass pipe 23 and its second end is h1, and the distance between the oil return hole and the second end of the bypass pipe 23 is h2. Since h1 > h2, 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 This invention provides an air conditioning system including the compressor assembly 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 receiver 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 ends of the first heat exchanger 30 and the second ends of the second heat exchanger 40 are connected through the throttling device 60.

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

[0049] In some embodiments, the compressor assembly further includes a first temperature sensor 71, which is placed between the exhaust port of the compressor body 10 and the first end of the four-way valve 50, for detecting the 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 transmitting the first temperature T1 to the controller 25.

[0050] When the air conditioning system is detected to be in the first state, the controller 25 controls the opening degree of the regulating device 24 based on the comparison between the first temperature T1 and the target first temperature T1'.

[0051] The first state here refers to the operating state of the air conditioning system when it is not frosting.

[0052] In the first state, the first temperature T1 of the refrigerant is the discharge temperature of the compressor body 10. The controller compares the discharge temperature of the compressor body 10 with the target first temperature T1' and obtains the corresponding control signal through a predetermined algorithm. This data is then transmitted to the regulating device 24, which adjusts the opening degree to control the discharge temperature of the compressor body 10. It should be noted that the target first temperature T1' can be set according to actual needs, and this embodiment of the invention does not impose specific limitations.

[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 the 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 refers to the operating state of the air conditioning system when it is frosted.

[0055] In the second state, the first temperature T1 of the refrigerant is the same as the discharge temperature of the compressor body 10. The second temperature T2 of the refrigerant is the outlet temperature of the refrigerant after flowing through the second heat exchanger (which is the condenser at this time). When the air conditioning system is detected to be in the second state, the controller 25 controls the opening degree of the regulating device 24 based on the comparison between 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 embodiments of the present invention do not impose specific limitations.

[0057] The conditions for adjusting the opening degree of the regulating device 24 are not limited to the temperature detection method mentioned above. Other data parameters that can reflect different working states (such as the evaporator outlet state) can also be used as control strategies for the opening degree of the air conditioning system regulating device 24. This invention does not limit this.

[0058] like Figure 3 As shown, this embodiment of the invention also provides a control method for an air conditioning system, used to control the air conditioning system described above. The control method includes the following steps:

[0059] S100: Detects the current operating status of the air conditioning system;

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

[0061] S300: When the air conditioning system is detected to be in the second state, the controller 25 controls the opening degree of the regulating device 24 based on 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 provided by this invention have the following advantages:

[0063] This invention improves the operating efficiency of the air conditioning system by setting a bypass pipe and a regulating device on the liquid receiver, and by controlling the opening degree of the regulating device in response to the indication of the air conditioning system under different operating conditions.

[0064] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. An air conditioning system, characterized by, The air conditioning system comprises: a compressor assembly comprising a compressor body and a liquid accumulator arranged on the compressor body, the liquid accumulator comprising a cylinder body comprising a liquid storage cavity, a gas inlet pipe, one end of the gas inlet pipe being located in the liquid storage cavity, the other end of the gas inlet pipe being in communication with the compressor body, an oil return hole being arranged on the side wall of the gas inlet pipe located in the liquid storage cavity, the fluid in the liquid storage cavity being able to return to the inside of the compressor body through the oil return hole, a bypass pipe, a first end of the bypass pipe being in communication with the liquid storage cavity, a second end of the bypass pipe being in communication with the gas inlet pipe located outside the liquid storage cavity, a regulating device being arranged between the first end and the second end of the bypass pipe, and a controller being used to control the opening degree of the regulating device to adjust the flow of the fluid returning to the inside of the compressor body; a first heat exchanger, a second heat exchanger, a four-way valve and a throttling device, a first end of the four-way valve being connected with the gas outlet of the compressor body, a second end of the four-way valve being connected with the gas inlet of the liquid accumulator, a third end of the four-way valve being connected with the first end of the first heat exchanger, and a fourth end of the four-way valve being connected with the first end of the second heat exchanger, the second end of the first heat exchanger being connected with the second end of the second heat exchanger through the throttling device; a first temperature sensor being arranged between the gas outlet of the compressor body and the first end of the four-way valve, and being used to detect the first temperature of the refrigerant between the gas outlet of the compressor body and the first end of the four-way valve, and transmit the first temperature to the controller; a second temperature sensor being arranged between the second end of the second heat exchanger and the throttling device, and being used to detect the second temperature of the refrigerant between the second end of the second heat exchanger and the throttling device, and transmit 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 regulating device according to the comparison between the temperature difference between the first temperature and the second temperature and a target temperature difference.

2. The air conditioning system of claim 1, wherein, when it is detected that the air conditioning system is in the first state, the controller controls the opening degree of the regulating device according to the comparison between the first temperature and a target first temperature.

3. The air conditioning system of claim 1, wherein, The regulating device is an electronic expansion valve.

4. The air conditioning system of claim 1, wherein, The height of the first end of the bypass pipe is higher than the height of the oil return hole.

5. The air conditioning system of claim 1, wherein, The number of the oil return holes is greater than or equal to 1.

6. A control method of an air conditioning system, characterized by, The control method for controlling the air conditioning system of claim 2 comprises the following steps: detecting the current working state of the air conditioning system; when it is detected that the air conditioning system is in the first state, the controller controls the opening degree of the regulating device according to the comparison between the first temperature and a target first temperature.

7. A control method of an air conditioning system, characterized by, The control method for controlling the air conditioning system of claim 1 comprises the following steps: detecting the current working state 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 regulating device according to the comparison between the temperature difference between the first temperature and the second temperature and a target temperature difference.

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