WO2023178870A1 - Air conditioning system, control device and method therefor, and computer storage medium - Google Patents

Abstract

An air conditioning system (100), comprising a compressor (10), a four-way valve (50), an outdoor heat exchanger (20), a throttling device (30), and an indoor heat exchanger (40), all of which are in communication with each other and form a refrigerant circulation loop. The refrigerant circulation loop comprises an exhaust pipe (60) in communication with an exhaust port of the compressor (10). The compressor (10) comprises a pump body (11), which is internally provided with an oil pool (111); a hollow interlayer (12), which is disposed adjacent to the side of the pump body (11) on which the oil pool (111) is located, the hollow interlayer (12) being provided with an air inlet port (121) and an air outlet port (122) that communicate with one another, the air inlet port (121) communicating with the air exhaust pipe (60) by means of a first connecting pipe (70), the air outlet port (122) communicating with the exhaust pipe (60) by means of a second connecting pipe (80), and the first connecting pipe (70) being provided with a switch valve (71) for controlling the closing and opening of the pipe; and a liquid storage tank (13), which is provided on the side of the hollow interlayer (12) away from the pump body.

Description

Air conditioning system and control device and method thereof, computer storage medium

This application claims priority to Chinese patent applications with application numbers 202210292880.9 and 202220659581.X filed on March 24, 2022, the entire contents of which are incorporated into this application by reference.

Technical field

The present application relates to the technical field of air conditioning, and in particular to an air conditioning system, its control device and method, and computer storage media.

Background technique

Traditional integrated compressors usually place the liquid storage tank below the oil pool of the pump body. The temperature of the liquid storage tank is relatively low, resulting in a large amount of heat exchange between the oil pool and the liquid storage tank, which in turn causes the oil temperature in the oil pool to decrease. . When the air conditioner is in extreme operating conditions, affected by the cooling of the low-temperature liquid storage tank, the oil temperature of the compressor oil pool is lower, and the viscosity of the lubricating oil increases, making it unable to lubricate the internal friction pairs of the compressor in time, eventually causing the compressor to fail, thereby affecting Operational reliability of air conditioning systems.

technical problem

The main purpose of this application is to propose an air conditioning system, aiming to improve the operational reliability of the air conditioning system.

Technical solutions

In order to achieve the above purpose, the air conditioning system proposed in this application includes a compressor, a four-way valve, an outdoor heat exchanger, a throttling device and an indoor heat exchanger that are interconnected and form a refrigerant circulation loop; the refrigerant circulation loop includes a An exhaust pipeline connected to the exhaust port of the compressor; the compressor includes:

The pump body has an oil pool inside;

A hollow interlayer is provided adjacent to the side of the pump body where the oil pool is provided. The hollow interlayer is provided with an air inlet port and an air outlet port that are connected to each other. The air inlet port is connected to the exhaust port through a first connecting pipe. The air pipeline is connected, the air outlet port is connected to the exhaust pipeline through a second connecting pipeline, and the first connecting pipeline is provided with a switch valve for controlling the opening and closing of the pipeline; and

A liquid storage tank is located on the side of the hollow interlayer away from the pump body.

In one embodiment, the oil pool is located at the lower end of the interior of the pump body, the hollow interlayer is located on the lower side of the oil pool, and the liquid storage tank is located on the lower side of the hollow interlayer.

In one embodiment, the air conditioning system further includes a one-way valve provided in the second connecting pipe, the one-way valve being used to prevent the fluid in the second connecting pipe from flowing toward the air outlet port. Reflux.

In one embodiment, the switch valve uses a solenoid valve.

In one embodiment, the refrigerant circulation circuit further includes an air return pipe connected to the air return port of the compressor, and the air return pipe is provided with a filter.

This application also proposes a control device for an air conditioning system, which is used in the air conditioning system as described above. The control device for the air conditioning system includes:

A mode detection module, used to detect the current operating mode of the air conditioning system;

Status detection module, used to detect the operating status of the compressor;

An environment detection module, used to detect the operating environment of the air conditioning system;

a judgment module configured to judge whether the air conditioning system is in an outdoor low-temperature operating environment based on the detection results fed back by the environment detection module when the compressor is turned on and reaches a stable operating state in the current operating mode; and

A control module used to control opening of the switch valve when the air conditioning system is in an outdoor low-temperature operating environment.

In one embodiment, the status detection module includes a timing unit, which is used to obtain the cumulative running time after the compressor is turned on.

In one embodiment, the environment detection module includes a first temperature detection unit, a second temperature detection unit and a third temperature detection unit, and the first temperature detection unit is used to detect the current indoor heat exchanger coil temperature, The second temperature detection unit is used to detect the current outdoor heat exchanger coil temperature, and the third temperature detection unit is used to detect the current outdoor environment temperature.

In one embodiment, when the current operating mode is the cooling mode or the dehumidification mode and T4 ≤ Tamb1 and T2 ≤ Tvap is satisfied, the switch valve is in an open state; when the current operating mode is the heating mode, the condition is satisfied When T4≤Tamb2 and T3≤Tcon, the switch valve is in an open state; where, T2 is the current indoor heat exchanger coil temperature, T3 is the current outdoor heat exchanger coil temperature, T4 is the current outdoor ambient temperature, and Tvap is The indoor heat exchanger coil temperature judgment threshold, Tcon is the outdoor heat exchanger coil temperature judgment threshold, Tamb1 is the first judgment threshold of outdoor ambient temperature, and Tamb2 is the second judgment threshold of outdoor ambient temperature.

In one embodiment, when the current operating mode is cooling mode or dehumidification mode and T4≥Tamb1+C1 or T2≥Tvap+C2 is satisfied, the switch valve is in a closed state; when the current operating mode is heating mode, when T4≥Tamb1+C1 or T2≥Tvap+C2 is satisfied; When T4≥Tamb2+C3 or T3≥Tcon+C4, the switching valve is in a closed state; wherein, C1, C2, C3 and C4 are all constants greater than zero.

In one embodiment, Tvap≤10°C, Tcon≤10°C, Tamb1≤17°C, and Tamb2≤8°C.

This application also proposes a control method for an air conditioning system, which is used in the air conditioning system as described above. The control method of the air conditioning system includes the following steps:

Detect the current operating mode of the air conditioning system;

Detect the operating status of the compressor;

Detecting the operating environment of the air conditioning system when the compressor is turned on and reaches a stable operating state in the current operating mode;

Determine whether the air conditioning system is in an outdoor low-temperature operating environment;

When the air conditioning system is in an outdoor low-temperature operating environment, the switch valve is controlled to open.

In one embodiment, the step of detecting the operating status of the compressor includes:

Detect whether the compressor is on;

Obtain the cumulative running time after the compressor is turned on;

When the cumulative operating time reaches the preset time, it is determined that the compressor has reached a stable operating state.

In one embodiment, the step of detecting the operating environment of the air conditioning system when the compressor is turned on and reaches a stable operating state in the current operating mode includes:

When the current operating mode is the cooling mode or the dehumidification mode, when the compressor is turned on and reaches a stable operating state, the current indoor heat exchanger coil temperature and the current outdoor ambient temperature are detected;

When the current operating mode is the heating mode, when the compressor is turned on and reaches a stable operating state, the current outdoor heat exchanger coil temperature and the current outdoor ambient temperature are detected.

In one embodiment, the step of determining whether the air conditioning system is in an outdoor low-temperature operating environment includes:

When the current operating mode is the cooling mode or the dehumidification mode, determine whether T4 ≤ Tamb1 and T2 ≤ Tvap are satisfied, and if so, it is determined that the air conditioning system is in an outdoor low-temperature operating environment;

When the current operating mode is the heating mode, it is determined whether T4≤Tamb2 and T3≤Tcon are satisfied, and if so, it is determined that the air conditioning system is in an outdoor low-temperature operating environment;

Among them, T2 is the current indoor heat exchanger coil temperature, T3 is the current outdoor heat exchanger coil temperature, T4 is the current outdoor ambient temperature, Tvap is the indoor heat exchanger coil temperature determination threshold, and Tcon is the outdoor heat exchanger disk. Pipe temperature determination threshold, Tamb1 is the first determination threshold of outdoor ambient temperature, Tamb2 is the second determination threshold of outdoor ambient temperature.

In one of the embodiments, after the step of controlling to open the on-off valve when the air conditioning system is in an outdoor low-temperature operating environment, the step further includes:

When the current operating mode is the cooling mode or the dehumidification mode, determine whether T4≥Tamb1+C1 or T2≥Tvap+C2 is satisfied; if it is satisfied, the switch valve is controlled to close;

When the current operating mode is the heating mode, determine whether T4≥Tamb2+C3 or T3≥Tcon+C4 is satisfied; if it is satisfied, the switch valve is controlled to close;

Among them, C1, C2, C3 and C4 are all constants greater than zero.

In one embodiment, Tvap≤10°C, Tcon≤10°C, Tamb1≤17°C, and Tamb2≤8°C.

This application also proposes a computer storage medium that stores a control program for an air conditioner system. When the control program for the air conditioner system is executed by a processor, the control method for the air conditioner system as described above is implemented.

beneficial effects

The technical solution of the present application is to provide a hollow interlayer on the compressor of the air conditioning system, and the hollow interlayer is connected to the exhaust pipeline of the refrigerant circulation loop through the first connecting pipe and the second connecting pipe. Under normal circumstances, the switch valve is closed by default after the air conditioner is turned on. When the oil pool in the compressor needs to be heated, the switch valve is opened, and the high-temperature gas in the exhaust pipe can enter the hollow interlayer through the air inlet port, and then Return from the air outlet port to the exhaust pipe. After the high-temperature gas enters the hollow interlayer, it can synchronously heat the pump body, causing the temperature of the lubricating oil in the oil pool of the pump body to rise. This can avoid the long-term low-frequency operation of the compressor or the oil temperature being cooled too low in a low-temperature outdoor environment. If the viscosity is too high, ensure that the lubricating oil has good fluidity and can promptly lubricate the friction pairs inside the compressor, thereby improving the operating reliability of the compressor and thus the operating reliability of the air conditioning system. Moreover, the above-mentioned air conditioning system uses the heat source generated by its own exhaust pipe to heat the hollow interlayer, which can make full use of energy and reduce energy consumption.

Description of the drawings

In order to explain the embodiments of the present application or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of an embodiment of the air conditioning system of the present application;

Figure 2 is a schematic structural diagram of an embodiment of the control device of the air conditioning system of the present application;

Figure 3 is a schematic flow chart of an embodiment of the control method of the air conditioning system of the present application;

Figure 4 is a schematic flow diagram of an embodiment of a control method for an air conditioning system in cooling or dehumidification mode;

Figure 5 is a schematic flowchart of an embodiment of a control method for an air conditioning system in heating mode.

Explanation of reference numbers:

label	name	label	name
100	Air Conditioning System	40	indoor heat exchanger
10	compressor	50	Four-way valve
11	Pump body	60	Exhaust line
111	Oil pool	70	first connecting pipe
12	Hollow sandwich	71	On/off valve
121	intake port	80	Second connecting pipe
122	Outlet port	81	One-way valve
13	Liquid storage tank	110	Pattern detection module
14	Return air pipe	120	Status detection module
15	filter	130	Environmental detection module
16	Connecting pipe	140	Judgment module
20	outdoor heat exchanger	150	control module
30	Throttling device	​	​

The realization of the purpose, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings.

Embodiments of the invention

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the embodiments of this application, the directional indications are only used to explain the relationship between the components in a specific posture. The relative position relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving “first”, “second”, etc. in the embodiments of this application, the descriptions of “first”, “second”, etc. are only for descriptive purposes and shall not be understood as indications or implications. Its relative importance or implicit indication of the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, if "and/or" or "and/or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and/or B" as an example, it includes solution A, or solution B, or solution A and A solution that satisfies B at the same time. In addition, the technical solutions in various embodiments can be combined with each other, but it must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that such a combination of technical solutions does not exist. , nor is it within the scope of protection required by this application.

This application proposes an air conditioning system 100.

Please refer to Figure 1. In an embodiment of the present application, the air conditioning system 100 includes a compressor 10, a four-way valve 50, an outdoor heat exchanger 20, a throttling device 30 and an indoor heat exchanger that are interconnected and form a refrigerant circulation loop. 40; The refrigerant circulation loop includes an exhaust pipeline 60 connected with the exhaust port of the compressor 10; the compressor 10 includes a pump body 11, a hollow interlayer 12 and a liquid storage tank 13. Wherein, an oil pool 111 is provided inside the pump body 11; the hollow interlayer 12 is provided adjacent to the side of the pump body 11 where the oil pool 111 is provided, and the hollow interlayer 12 is provided with interconnected air inlet ports. 121 and an air outlet port 122. The air inlet port 121 is connected to the exhaust pipe 60 through a first connecting pipe 70, and the air outlet port 122 is connected to the exhaust pipe 60 through a second connecting pipe 80. , the first connecting pipeline 70 is provided with a switch valve 71 for controlling the opening and closing of the pipeline; the liquid storage tank 13 is located on the side of the hollow interlayer 12 away from the pump body 11 .

Specifically, the air conditioning system 100 includes a compressor 10 , a four-way valve 50 , an outdoor heat exchanger 20 (such as a condenser), a throttling device 30 and an indoor heat exchanger 40 (such as a heat exchanger) that are connected to each other and form a refrigerant circulation loop. device). The four-way valve 50 has a first port, a second port, a third port and a fourth port. The compressor 10 includes an exhaust port located on the pump body 11 and an air return port located on the liquid storage tank 13. The first port and the exhaust port The air port is connected, the second port is connected with the air return port, the third port is connected with the outdoor heat exchanger 20 , and the fourth port is connected with the indoor heat exchanger 40 . The four-way valve 50 can change the flow direction of the refrigerant in the refrigerant circulation circuit, thereby enabling the air conditioning system 100 to implement different functional modes. When the first port is connected to the third port, and the second port is connected to the fourth port, the air conditioning system 100 implements the cooling function or the dehumidification function; when the first port is connected to the fourth port, and the second port is connected to the third port, The air conditioning system 100 implements a heating function.

Taking the cooling mode as an example, the exhaust port of the compressor 10 is connected to the input end of the outdoor heat exchanger 20 (condenser) through the four-way valve 50, and the output end of the outdoor heat exchanger 20 exchanges heat with the indoor through the throttling device 30. The input end of the indoor heat exchanger 40 (evaporator) is connected, and the output end of the indoor heat exchanger 40 is connected with the air return port of the compressor 10 through the four-way valve 50, thereby forming a refrigerant circulation loop. In the refrigeration mode, the pump body 11 of the compressor 10 compresses the refrigerant into a high-temperature and high-pressure gaseous refrigerant and transports it to the outdoor heat exchanger 20 through the exhaust pipeline 60. In the outdoor heat exchanger 20, the refrigerant is liquefied and cooled to form a medium-temperature and high-pressure liquid. Refrigerant, the medium-temperature and high-pressure liquid refrigerant forms a low-temperature and low-pressure liquid refrigerant through the throttling device 30 and is transported to the indoor heat exchanger 40. In the indoor heat exchanger 40, the refrigerant evaporates and absorbs heat to form a low-temperature and low-pressure gaseous refrigerant. Then, the low-temperature and low-pressure gaseous refrigerant passes through the return The air port is delivered to the liquid storage tank 14, thus forming a cycle. The working principle of the air conditioning system 100 is well known to those skilled in the art and will not be described in detail here. The working principle of the air conditioning system 100 is well known to those skilled in the art and will not be described in detail here.

In the air conditioning system 100 described above, the compressor 10 is a power component that enables refrigerant to circulate along the refrigerant circulation circuit. The compressor 10 is an integrated compressor 10 that integrates the pump body 11 and the liquid storage tank 13 into one body. The overall structure is compact and takes up little space. It is well suited for the miniaturization development of the compressor 10 and the air-conditioning outdoor unit. Among them, the pump body 11 is the core power component. There is an oil pool 111 inside the pump body 11. The oil pool 111 is generally located at the bottom of the pump body 11. Correspondingly, the liquid storage tank 13 is located below the pump body 11. A hollow interlayer 12 is provided between 11 and the liquid storage tank 13. The oil pool 111 is used to store lubricating oil, and the liquid storage tank 13 is used to store low-temperature refrigerant and returned lubricating oil. The liquid storage tank 13 and the pump body 11 are connected through a connecting pipe 16. The refrigerant and lubricating oil in the liquid storage tank 13 It can be transported to the pump body 11 via the connecting pipe 16 . By arranging the hollow interlayer 12 between the liquid storage tank 13 and the pump body 11, a certain heat insulation effect can be achieved. The hollow interlayer 12 has an air inlet port 121, an air outlet port 122, and a hollow cavity connecting the air inlet port 121 and the air outlet port 122. The air inlet port 121 is connected to the exhaust pipe 60 through the first connecting pipe 70 , and the air outlet port 122 is connected to the exhaust pipe 60 through the second connecting pipe 80 . The first connecting pipe 70 can be connected by controlling the switch valve 71 conduct or isolate. Among them, the switch valve 71 includes but is not limited to a mechanical valve or a solenoid valve, as long as it can control the conduction and isolation of the pipeline. Optionally, in this embodiment, the switch valve 71 uses a solenoid valve.

The technical solution of the present application is to provide a hollow interlayer 12 on the compressor 10 of the air conditioning system 100. The hollow interlayer 12 is connected to the exhaust pipe 60 of the refrigerant circulation circuit through the first connecting pipe 70 and the second connecting pipe 80. Under normal circumstances, the switch valve 71 is closed by default after the air conditioner is turned on. When the oil pool 111 in the compressor 10 needs to be heated, the switch valve 71 is opened, and the high-temperature gas in the exhaust pipe 60 can pass through the air inlet port. 121 enters the hollow interlayer 12, and then returns to the exhaust pipe 60 through the air outlet port 122. After the high-temperature gas enters the hollow interlayer 12, it can synchronously heat the pump body 11, causing the temperature of the lubricating oil in the oil pool 111 of the pump body 11 to increase, thereby preventing the compressor 10 from running at low frequency for a long time or cooling the oil temperature in a low-temperature outdoor environment. If the viscosity of the lubricating oil is too low and the viscosity of the lubricating oil is too high, ensure that the lubricating oil has good fluidity and can promptly lubricate the friction pairs inside the compressor 10, thereby improving the operational reliability of the compressor 10 and thereby improving the operation of the air conditioning system 100. reliability. Moreover, the above-mentioned air conditioning system 100 uses the heat source generated by its own exhaust pipe 60 to heat the hollow interlayer 12, which can make full use of energy and reduce energy consumption.

It should be noted that in actual applications, depending on the application scenarios of the compressor 10, the compressor 10 can be a vertical structure or a horizontal structure. Correspondingly, the pump body 11, the hollow interlayer 12 and the liquid storage tank 13 can be They can be arranged vertically adjacent to each other, or horizontally adjacent to each other. Usually in the air conditioning system 100, the compressor 10 adopts a vertical structure. In order to better adapt to the air conditioning system 100, in one embodiment, the oil pool 111 is located at the lower end of the inside of the pump body 11. The hollow interlayer 12 is located on the lower side of the oil pool 111 , and the liquid storage tank 13 is located on the lower side of the hollow interlayer 12 .

In order to prevent the high-temperature gas in the exhaust pipe 60 from entering the hollow interlayer 12 when there is no need to heat the oil pool 111, in one embodiment, the air conditioning system 100 also includes a The one-way valve 81 of the pipeline 80 is used to prevent the fluid in the second connecting pipeline 80 from flowing back toward the air outlet port 122 . Specifically, by disposing the one-way valve 81 on the second connecting pipe 80 , when the switch valve 71 is opened, the gas in the hollow interlayer 12 flows back to the exhaust pipe 60 through the gas outlet port 122 and the one-way valve 81 . When the switch valve 71 is closed, the high-temperature gas in the exhaust pipe 60 will not enter the hollow interlayer 12 through the second connecting pipe 80 and the gas outlet port 122 .

In one embodiment, the refrigerant circulation circuit further includes a return air pipe 14 connected to the air return port of the compressor 10 , and the return air pipe 14 is provided with a filter 15 . Specifically, the refrigerant and lubricating oil in the refrigerant circulation circuit can be returned to the compressor 10 through the return pipe 14. By setting the filter 15 in the return pipe 14, impurities can be filtered to prevent impurities from entering the compressor 10 and accumulating for a long time. Damage to the compressor 10 can further improve the operational reliability of the compressor 10 and the air conditioning system 100 .

In addition, in order to prevent the heat in the hollow interlayer from being significantly transferred to the liquid storage tank, in one embodiment, the compressor 10 further includes a heat insulation layer provided between the hollow interlayer 12 and the liquid storage tank 13 . The heat insulation layer can prevent heat from being transferred from the hollow interlayer 12 to the liquid storage tank 13 to ensure that the heat in the hollow interlayer 13 can be transferred to the pump body 11 as much as possible. Optionally, the heat insulation layer has a hollow cavity, and the hollow cavity is filled with heat insulation material or evacuated to achieve a better heat insulation effect.

Based on the above-mentioned air conditioning system 100, this application also proposes a control device for the air conditioning system 100.

Please refer to FIG. 2 . In one embodiment of the present application, the control device of the air conditioning system 100 includes a mode detection module 110 , a state detection module 120 , an environment detection module 130 , a judgment module 140 and a control module 150 . Among them, the mode detection module 110 is used to detect the current operating mode of the air conditioning system 100; the state detection module 120 is used to detect the operating state of the compressor 10; and the environment detection module 130 is used to detect the air conditioning system. The operating environment in which 100 is located; the judgment module 140 is used to judge the air conditioning system 100 according to the detection results fed back by the environment detection module 130 when the compressor 10 is turned on and reaches a stable operating state in the current operating mode. Whether it is in an outdoor low-temperature operating environment; the control module 150 is used to control opening the switch valve 71 when the air-conditioning system 100 is in an outdoor low-temperature operating environment.

Specifically, after the air conditioning system 100 is started, the on-off valve 71 on the first connecting pipe 70 is closed by default. When the air conditioning system 100 is running, the current operating environment of the air conditioner needs to be determined through the control device of the air conditioning system 100. When When the air conditioning system 100 is in a low-temperature operating environment, the switch valve 71 is controlled to open in time. Among them, the mode detection module 110 is used to detect the current operating mode of the air conditioning system 100. The air conditioning system 100 includes a cooling mode, a dehumidification module and a heating mode. Through the operation detection module, it can be detected whether the current air conditioning system 100 is in the cooling mode or the dehumidification mode. , still in heating mode. The state detection module 120 is used to detect the operating state of the compressor 10, that is, to detect whether the compressor 10 is turned on and reaches a stable operating state. The environment detection module 130 is used to detect the operating environment of the air conditioning system 100, specifically to detect the coil temperature of the indoor heat exchanger 40, the coil temperature of the outdoor heat exchanger 20, and the outdoor ambient temperature of the air conditioning system 100. The control module 150 is used to control opening or closing of the switching valve 71 .

In this embodiment, the control device of the air-conditioning system 100 can determine whether the air-conditioning system 100 is in a low-temperature operating environment, and promptly controls to open the switch valve 71 when the air-conditioning system 100 is in a low-temperature operating environment. After the switch valve 71 is opened, the exhaust pipe 60 of the refrigerant circulation loop is connected to the hollow interlayer 12 of the compressor 10 , causing the temperature in the hollow interlayer 12 to rise, and then the high-temperature gas passing through the hollow interlayer 12 can affect the compressor 10 The oil pool 111 of the pump body 11 is heated to further increase the fluidity of the lubricating oil, so that the lubricating oil can promptly lubricate the friction pairs inside the compressor 10, which can prevent the compressor 10 from being cooled to too low a temperature when the compressor 10 is operating in a low-temperature outdoor operating environment. As a result, the viscosity of the lubricating oil is too high, thereby improving the operational reliability of the compressor 10 and thus the operational reliability of the air conditioning system 100 .

In order to more accurately determine whether the compressor 10 has reached a stable operating state after it is turned on, in one embodiment, the state detection module 120 includes a timing unit, and the timing unit is used to obtain the status of the compressor 10 after it is turned on. Cumulative running time. Specifically, after it is detected that the compressor 10 is turned on, the timing unit is used to time the accumulated operating time after the compressor 10 is turned on. When the accumulated operating time reaches the preset time, it can be determined that the compressor 10 has reached a stable operating state. Among them, the preset duration can be set according to actual conditions, for example, set to 5 minutes. For example, when the mode detection module 110 detects that the current operating mode of the air conditioning system 100 is the cooling mode or the dehumidification mode, then the status detection module 120 detects whether the compressor 10 is turned on. After detecting that the compressor 10 is turned on, the timing unit determines whether the compressor 10 is turned on. The running time of the compressor 10 is accumulated and timed. When the compressor 10 is turned on and runs for 5 minutes, it can be considered that the operation of the compressor 10 and the air conditioning system 100 has reached a stable state at this time, so that subsequent detection can be started to ensure that the follow-up Accuracy of test results.

In one embodiment, the environment detection module 130 includes a first temperature detection unit, a second temperature detection unit and a third temperature detection unit. The first temperature detection unit is used to detect the current indoor heat exchanger 40 coil. temperature, the second temperature detection unit is used to detect the current coil temperature of the outdoor heat exchanger 20, and the third temperature detection unit is used to detect the current outdoor ambient temperature. Specifically, the first temperature detection unit can be located at the coil of the indoor heat exchanger 40 to detect the temperature of the coil of the indoor heat exchanger 40 in real time; the second temperature detection unit can be located at the coil of the outdoor heat exchanger 20 , to detect the temperature of the coil of the outdoor heat exchanger 20 in real time; the third temperature detection unit can be located in the outdoor environment to detect the outdoor environment temperature in real time. The first temperature detection unit, the second temperature detection unit and the third temperature detection unit may use temperature probes or other forms of temperature sensors.

When the operating mode of the air conditioning system 100 is different, the conditions for determining whether the air conditioning system 100 is in an outdoor environment are different accordingly, so that the actual operating environment of the air conditioning system 100 can be reflected more accurately.

In one embodiment, when the current operating mode is the cooling mode or the dehumidification mode and T4≤Tamb1 and T2≤Tvap are satisfied, the control module 150 is used to control opening of the switch valve 71; where T2 is the current Indoor heat exchanger coil temperature, T4 is the current outdoor ambient temperature, Tvap is the indoor heat exchanger coil temperature determination threshold, and Tamb1 is the first determination threshold of outdoor ambient temperature.

Specifically, when the mode detection module 110 detects that the current operating mode of the air conditioning system 100 is the cooling mode or the dehumidification mode, the status detection module 120 begins to detect whether the compressor 10 is turned on, and makes a determination after the compressor 10 is turned on and continues to run for a preset time. The system tends to a stable operating state; then the first detection unit detects the current indoor heat exchanger 40 coil temperature T2, and the third detection unit detects the current outdoor ambient temperature T4. When the determination module 140 determines that both T4 ≤ Tamb1 and T2 ≤ Tvap are satisfied, it is determined that the air conditioning system 100 is in an outdoor low-temperature operating environment; then the control module 150 controls to open the switch valve 71 . Among them, the indoor heat exchanger coil temperature determination threshold Tvap and the outdoor ambient temperature first determination threshold Tamb1 can be set according to actual needs. Generally, Tamb1<Tvap. Optionally, Tamb1≤17℃, Tvap≤10℃.

After opening the switch valve 71 in the cooling mode or dehumidification mode, the switch valve 71 is closed in order to control it in time. Further, when the current operating mode is the cooling mode or the dehumidification mode and T4≥Tamb1+C1 or T2≥Tvap+C2 is satisfied, the control module 150 is used to control to close the switch valve 71, wherein both C1 and C2 are greater than zero. constant.

Specifically, in cooling mode or dehumidification mode, after opening the switch valve 71, the first detection unit continues to detect the current indoor heat exchanger coil temperature T2, and the third detection unit continues to detect the current outdoor ambient temperature T4. When the judgment module 140 determines When T4≥Tamb1+C1 or T2≥Tvap+C2 is satisfied, the control module 150 controls to close the switching valve 71. Among them, parameters C1 and C2 are constant values, and their values are positive numbers. Optionally, C1 and C2 take multiples of 0.5. For example, C1 and C2 can take values of 0.5°C or 1°C.

In one embodiment, when the current operating mode is the heating mode and T4≤Tamb2 and T3≤Tcon are satisfied, the control module 150 is used to control opening of the on-off valve 71; where T3 is the current outdoor switching valve. Heater coil temperature, T4 is the current outdoor ambient temperature, Tcon is the outdoor heat exchanger coil temperature determination threshold, and Tamb2 is the second determination threshold of the outdoor ambient temperature.

Specifically, when the mode detection module 110 detects that the current operating mode of the air conditioning system 100 is the heating mode, the status detection module 120 begins to detect whether the compressor 10 is turned on, and determines that the system tends to be abnormal after the compressor 10 is turned on and continues to run for a preset time. in a stable operating state; then the second detection unit detects the current outdoor heat exchanger coil temperature T3, and the third detection unit detects the current outdoor ambient temperature T4. When the determination module 140 determines that both T4 ≤ Tamb2 and T3 ≤ Tcon are satisfied, it is determined that the air conditioning system 100 is in an outdoor low-temperature operating environment; then the control module 150 controls to open the switch valve 71 . Among them, the outdoor heat exchanger coil temperature determination threshold Tcon and the outdoor ambient temperature second determination threshold Tamb2 can be set according to actual needs. Generally, Tamb2<Tcon. Optionally, Tamb2≤8℃, Tvap≤10℃.

After opening the on-off valve 71 in the heating mode, the on-off valve 71 is closed for timely control. Further, when the current operating mode is the heating mode and T4≥Tamb2+C3 or T3≥Tcon+C4 is satisfied, the control module 150 is used to control and close the switching valve 71, where both C3 and C4 are greater than zero. constant.

Specifically, in the heating mode, after the switch valve 71 is opened, the second detection unit continues to detect the current outdoor heat exchanger coil temperature T3, and the third detection unit continues to detect the current outdoor ambient temperature T4. When the judgment module 140 determines that T4 is satisfied When ≥Tamb2+C3 or T3≥Tcon+C4, the control module 150 controls to close the switching valve 71 . Among them, parameters C3 and C4 are constant values, and their values are positive numbers. Optionally, C3 and C4 take multiples of 0.5. For example, C3 and C4 can take values of 0.5°C or 1°C.

Based on the above-mentioned air conditioning system 100, this application also proposes a control method of the air conditioning system 100, specifically related to a control method of the air conditioning system 100 in a low-temperature operating environment.

Please refer to Figure 3. In an embodiment of the present application, the control method of the air conditioning system 100 includes the following steps:

S1. Detect the current operating mode of the air conditioning system 100;

S2. Detect the operating status of the compressor 10;

S3. Detect the operating environment of the air conditioning system 100 when the compressor 10 is turned on and reaches a stable operating state in the current operating mode;

S4. Determine whether the air conditioning system 100 is in an outdoor low-temperature operating environment;

S5. When the air conditioning system 100 is in an outdoor low-temperature operating environment, control to open the switch valve 71.

In this embodiment, the control device of the air conditioning system 100 includes a mode detection module 110, a state detection module 120, an environment detection module 130, a judgment module 140 and a control module 150. After the air conditioning system 100 is started, the switch valve 71 on the first connecting pipe 70 is in a closed state by default. The mode detection module 110 detects the current operating mode of the air conditioning system 100. The air conditioning system 100 includes a cooling mode, a dehumidification module and a heating mode. The operation detection module can detect whether the air conditioning system 100 is currently in the cooling mode or the dehumidification mode, or in the heating mode. Heating mode. The operating state of the compressor 10 is detected through the state detection module 120, that is, whether the compressor 10 is turned on and reaches a stable operating state. The environment detection module 130 detects the operating environment of the air conditioning system 100 , specifically, detects the coil temperature of the indoor heat exchanger 40 , the coil temperature of the outdoor heat exchanger 20 and the outdoor ambient temperature of the air conditioning system 100 . Opening or closing of the switching valve 71 is controlled by the control module 150 .

Through the above control method of the air conditioning system 100, it can be determined whether the air conditioning system 100 is in a low temperature operating environment, and when the air conditioning system 100 is in a low temperature operating environment, the switch valve 71 can be opened in a timely manner. After the switch valve 71 is opened, the exhaust pipe 60 of the refrigerant circulation loop is connected to the hollow interlayer 12 of the compressor 10 , causing the temperature in the hollow interlayer 12 to rise, and then the high-temperature gas passing through the hollow interlayer 12 can affect the compressor 10 The oil pool 111 of the pump body 11 is heated to further increase the fluidity of the lubricating oil, so that the lubricating oil can promptly lubricate the friction pairs inside the compressor 10, which can prevent the compressor 10 from being cooled to too low a temperature when the compressor 10 is operating in a low-temperature outdoor operating environment. As a result, the viscosity of the lubricating oil is too high, thereby improving the operational reliability of the compressor 10 and thus the operational reliability of the air conditioning system 100 .

In order to more accurately determine whether the compressor 10 has reached a stable operating state after being turned on, in one embodiment, the step of detecting the operating state of the compressor 10 includes:

Detect whether the compressor 10 is turned on;

Obtain the cumulative operating time after the compressor 10 is turned on;

When the accumulated operating time reaches the preset time, it is determined that the compressor 10 has reached a stable operating state.

Specifically, the status detection module 120 includes a timing unit, which is used to obtain the accumulated running time after the compressor 10 is started. After detecting that the compressor 10 is turned on, the timing unit is used to time the accumulated operating time after the compressor 10 is turned on. When the accumulated operating time reaches the preset time, it can be determined that the compressor 10 has reached a stable operating state. Among them, the preset duration can be set according to actual conditions, for example, set to 5 minutes.

When the operating mode of the air conditioning system 100 is different, the conditions for determining whether the air conditioning system 100 is in an outdoor environment are different accordingly, so that the actual operating environment of the air conditioning system 100 can be reflected more accurately.

In one embodiment, the step of detecting the operating environment of the air conditioning system 100 when the compressor 10 is turned on and reaches a stable operating state in the current operating mode includes:

When the current operating mode is the cooling mode or the dehumidification mode, when the compressor 10 is turned on and reaches a stable operating state, the current indoor heat exchanger 40 coil temperature and the current outdoor ambient temperature are detected;

When the current operating mode is the heating mode, when the compressor 10 is turned on and reaches a stable operating state, the current coil temperature of the outdoor heat exchanger 20 and the current outdoor ambient temperature are detected.

Specifically, the environment detection module 130 includes a first temperature detection unit, a second temperature detection unit and a third temperature detection unit. The first temperature detection unit is used to detect the current coil temperature of the indoor heat exchanger 40, and the second temperature detection unit is used to detect the current coil temperature of the indoor heat exchanger 40. For detecting the current coil temperature of the outdoor heat exchanger 20, the third temperature detection unit is used for detecting the current outdoor ambient temperature. The first temperature detection unit, the second temperature detection unit and the third temperature detection unit may use temperature probes or other forms of temperature sensors. As shown in FIG. 4 , when the mode detection module 110 detects that the current operating mode of the air conditioning system 100 is the cooling mode or the dehumidification mode, the status detection module 120 begins to detect whether the compressor 10 is turned on, and continues to run the preset state when the compressor 10 is turned on. After a period of time, it is determined that the system tends to a stable operating state; then the first detection unit detects the current indoor heat exchanger coil temperature, and the third detection unit detects the current outdoor ambient temperature, and then the judgment unit can determine based on the current indoor heat exchanger coil temperature and the current The outdoor ambient temperature determines whether the air conditioning system 100 is in a low-temperature operating environment. As shown in Figure 5, when the mode detection module 110 detects that the current operating mode of the air conditioning system 100 is the heating mode, the status detection module 120 begins to detect whether the compressor 10 is turned on, and after the compressor 10 is turned on and continues to run for a preset time It is determined that the system tends to a stable operating state; then the second detection unit detects the current outdoor heat exchanger coil temperature, and the third detection unit detects the current outdoor environment temperature, and then the judgment unit can determine based on the current outdoor heat exchanger coil temperature and the current outdoor environment. The temperature determines whether the air conditioning system 100 is in a low temperature operating environment.

In one embodiment, the step of determining whether the air conditioning system 100 is in an outdoor low-temperature operating environment includes:

When the current operating mode is the cooling mode or the dehumidification mode, it is determined whether T4 ≤ Tamb1 and T2 ≤ Tvap are satisfied, and if so, it is determined that the air conditioning system 100 is in an outdoor low-temperature operating environment;

When the current operating mode is the heating mode, it is determined whether T4≤Tamb2 and T3≤Tcon are satisfied, and if so, it is determined that the air conditioning system 100 is in an outdoor low-temperature operating environment;

Among them, T2 is the current indoor heat exchanger 40 coil temperature, T3 is the current outdoor heat exchanger 20 coil temperature, T4 is the current outdoor ambient temperature, Tvap is the indoor heat exchanger 40 coil temperature judgment threshold, and Tcon is the outdoor heat exchanger 40 coil temperature. The coil temperature determination threshold of the heater 20 is: Tamb1 is the first determination threshold of the outdoor ambient temperature, and Tamb2 is the second determination threshold of the outdoor ambient temperature.

Specifically, as shown in Figure 4, when the current operating mode is the cooling mode or the dehumidification mode, after detecting that the compressor 10 is turned on and running for a preset time, the current indoor heat exchanger coil temperature T2 and the current outdoor ambient temperature T4 are started to be detected. , if T4 ≤ Tamb1 and T2 ≤ Tvap are satisfied, the switch valve 71 is controlled to be opened. If not, detection and judgment are continued. As shown in Figure 5, when the current operating mode is the heating mode, after detecting that the compressor 10 is turned on and running for a preset time, it starts to detect the current outdoor heat exchanger coil temperature T3 and the current outdoor ambient temperature T4. If T4≤ Tamb2 and T3≤Tcon, control to open the switch valve 71, if not satisfied, continue to detect and make judgments. Generally, Tamb1<Tvap. Tamb2<Tcon. Optionally, Tamb1≤17℃, Tvap≤10℃. Tamb2≤8℃, Tvap≤10℃.

After the switching valve 71 is opened, in order to be able to close the switching valve 71 in time. In one embodiment, after the step of controlling to open the switch valve 71 when the air conditioning system 100 is in an outdoor low-temperature operating environment, the step further includes:

When the current operating mode is the cooling mode or the dehumidification mode, determine whether T4≥Tamb1+C1 or T2≥Tvap+C2 is satisfied;

If T4≥Tamb1+C1 or T2≥Tvap+C2 is satisfied, the switch valve 71 is controlled to close;

When the current operating mode is the heating mode, determine whether T4≥Tamb2+C3 or T3≥Tcon+C4 is satisfied;

If T4≥Tamb2+C3 or T3≥Tcon+C4 is satisfied, the switch valve 71 is controlled to close;

Among them, C1, C2, C3 and C4 are all constants greater than zero.

Specifically, as shown in Figure 4, in cooling mode or dehumidification mode, after opening the switch valve 71, the first detection unit continues to detect the current indoor heat exchanger coil temperature T2, and the third detection unit continues to detect the current outdoor ambient temperature T4. , when the judgment module 140 judges that T4≥Tamb1+C1 or T2≥Tvap+C2 is satisfied, the control module 150 controls to close the switching valve 71. Among them, parameters C1 and C2 are constant values, and their values are positive numbers. Optionally, C1 and C2 take multiples of 0.5. For example, C1 and C2 can take values of 0.5°C or 1°C. As shown in Figure 5, in the heating mode, after opening the switch valve 71, the second detection unit continues to detect the current outdoor heat exchanger coil temperature T3, and the third detection unit continues to detect the current outdoor ambient temperature T4. When the judgment module 140 When it is determined that T4≥Tamb2+C3 or T3≥Tcon+C4 is satisfied, the control module 150 controls to close the switching valve 71. Among them, parameters C3 and C4 are constant values, and their values are positive numbers. Optionally, C3 and C4 take multiples of 0.5. For example, C3 and C4 can take values of 0.5°C or 1°C.

This application also proposes a computer storage medium that stores a control program for an air conditioner system. When the control program of the air conditioning system 100 is executed by a processor, the control method for the air conditioner system as described above is implemented. The specific implementation of the control method of the air conditioning system 100 may refer to the above-mentioned embodiments. Since this computer storage medium adopts all the technical solutions of the above-mentioned embodiments, it has all the beneficial effects brought by the above-mentioned embodiments. Herein No longer.

The above are only preferred embodiments of the present application, and do not limit the patent scope of the present application. Under the inventive concept of the present application, equivalent structural transformations made by using the contents of the description and drawings of the present application, or direct/indirect application Other related technical fields are included in the patent protection scope of this application.

Claims (18)

1. An air conditioning system, including a compressor, a four-way valve, an outdoor heat exchanger, a throttling device and an indoor heat exchanger that are interconnected and form a refrigerant circulation loop; the refrigerant circulation loop includes an exhaust port connected to the compressor Connected exhaust pipeline; wherein, the compressor includes:

   The pump body has an oil pool inside;

   A hollow interlayer is provided adjacent to the side of the pump body where the oil pool is provided. The hollow interlayer is provided with an air inlet port and an air outlet port that are connected to each other. The air inlet port is connected to the exhaust port through a first connecting pipe. The air pipeline is connected, the air outlet port is connected to the exhaust pipeline through a second connecting pipeline, and the first connecting pipeline is provided with a switch valve for controlling the opening and closing of the pipeline; and

   A liquid storage tank is located on the side of the hollow interlayer away from the pump body.
2. The air conditioning system according to claim 1, wherein the oil pool is located at the lower end of the inside of the pump body, the hollow interlayer is located on the lower side of the oil pool, and the liquid storage tank is located at the bottom of the hollow interlayer. lower side.
3. The air conditioning system according to claim 1, further comprising a one-way valve provided in the second connecting pipe, the one-way valve being used to prevent the fluid in the second connecting pipe from flowing toward the air outlet. Port backflow.
4. The air conditioning system according to any one of claims 1 to 3, wherein the switch valve adopts a solenoid valve.
5. The air conditioning system according to any one of claims 1 to 3, wherein the refrigerant circulation circuit further includes an air return pipe connected with the air return port of the compressor, and the air return pipe is provided with a filter.
6. A control device for an air conditioning system, used in the air conditioning system according to any one of claims 1 to 5, wherein the control device for the air conditioning system includes:

   A mode detection module, used to detect the current operating mode of the air conditioning system;

   Status detection module, used to detect the operating status of the compressor;

   An environment detection module, used to detect the operating environment of the air conditioning system;

   a judgment module configured to judge whether the air conditioning system is in an outdoor low-temperature operating environment based on the detection results fed back by the environment detection module when the compressor is turned on and reaches a stable operating state in the current operating mode; and

   A control module used to control opening of the switch valve when the air conditioning system is in an outdoor low-temperature operating environment.
7. The control device of the air conditioning system according to claim 6, wherein the state detection module includes a timing unit, the timing unit is used to obtain the accumulated running time after the compressor is turned on.
8. The control device of the air conditioning system according to claim 6 or 7, wherein the environment detection module includes a first temperature detection unit, a second temperature detection unit and a third temperature detection unit, the first temperature detection unit is used to Detect the current indoor heat exchanger coil temperature, the second temperature detection unit is used to detect the current outdoor heat exchanger coil temperature, and the third temperature detection unit is used to detect the current outdoor ambient temperature.
9. The control device of an air conditioning system according to claim 8, wherein when the current operating mode is a cooling mode or a dehumidification mode and T4≤Tamb1 and T2≤Tvap are satisfied, the switch valve is in an open state; The operating mode is heating mode, and when T4≤Tamb2 and T3≤Tcon are satisfied, the switch valve is in an open state; where T2 is the current indoor heat exchanger coil temperature, T3 is the current outdoor heat exchanger coil temperature, and T4 is the current outdoor ambient temperature, Tvap is the indoor heat exchanger coil temperature determination threshold, Tcon is the outdoor heat exchanger coil temperature determination threshold, Tamb1 is the first determination threshold of outdoor ambient temperature, and Tamb2 is the second determination threshold of outdoor ambient temperature.
10. The control device of the air conditioning system according to claim 9, wherein when the current operating mode is the cooling mode or the dehumidification mode and T4≥Tamb1+C1 or T2≥Tvap+C2 is satisfied, the switch valve is in a closed state; The operating mode is the heating mode, and when T4≥Tamb2+C3 or T3≥Tcon+C4 is satisfied, the switch valve is in a closed state; wherein, C1, C2, C3 and C4 are all constants greater than zero.
11. The control device of the air conditioning system according to claim 9, wherein Tvap≤10°C, Tcon≤10°C, Tamb1≤17°C, and Tamb2≤8°C.
12. A control method of an air conditioning system, used in the air conditioning system according to any one of claims 1 to 5, wherein the control method of the air conditioning system includes the following steps:

    Detect the current operating mode of the air conditioning system;

    Detect the operating status of the compressor;

    Detecting the operating environment of the air conditioning system when the compressor is turned on and reaches a stable operating state in the current operating mode;

    Determine whether the air conditioning system is in an outdoor low-temperature operating environment;

    When the air conditioning system is in an outdoor low-temperature operating environment, the switch valve is controlled to open.
13. The control method of the air conditioning system according to claim 12, wherein the step of detecting the operating status of the compressor includes:

    Detect whether the compressor is on;

    Obtain the cumulative running time after the compressor is turned on;

    When the cumulative operating time reaches the preset time, it is determined that the compressor has reached a stable operating state.
14. The control method of the air conditioning system according to claim 12 or 13, wherein the step of detecting the operating environment of the air conditioning system when the compressor is turned on and reaches a stable operating state in the current operating mode include:

    When the current operating mode is the cooling mode or the dehumidification mode, when the compressor is turned on and reaches a stable operating state, the current indoor heat exchanger coil temperature and the current outdoor ambient temperature are detected;

    When the current operating mode is the heating mode, when the compressor is turned on and reaches a stable operating state, the current outdoor heat exchanger coil temperature and the current outdoor ambient temperature are detected.
15. The control method of an air conditioning system according to claim 14, wherein the step of determining whether the air conditioning system is in an outdoor low-temperature operating environment includes:

    When the current operating mode is the cooling mode or the dehumidification mode, determine whether T4 ≤ Tamb1 and T2 ≤ Tvap are satisfied, and if so, it is determined that the air conditioning system is in an outdoor low-temperature operating environment;

    When the current operating mode is the heating mode, it is determined whether T4≤Tamb2 and T3≤Tcon are satisfied, and if so, it is determined that the air conditioning system is in an outdoor low-temperature operating environment;

    Among them, T2 is the current indoor heat exchanger coil temperature, T3 is the current outdoor heat exchanger coil temperature, T4 is the current outdoor ambient temperature, Tvap is the indoor heat exchanger coil temperature determination threshold, and Tcon is the outdoor heat exchanger disk. Pipe temperature determination threshold, Tamb1 is the first determination threshold of outdoor ambient temperature, Tamb2 is the second determination threshold of outdoor ambient temperature.
16. The control method of the air conditioning system according to claim 15, wherein after the step of controlling to open the switch valve when the air conditioning system is in an outdoor low-temperature operating environment, it further includes:

    When the current operating mode is the cooling mode or the dehumidification mode, determine whether T4≥Tamb1+C1 or T2≥Tvap+C2 is satisfied; if it is satisfied, the switch valve is controlled to close;

    When the current operating mode is the heating mode, determine whether T4≥Tamb2+C3 or T3≥Tcon+C4 is satisfied; if it is satisfied, the switch valve is controlled to close;

    Among them, C1, C2, C3 and C4 are all constants greater than zero.
17. The control method of the air conditioning system according to claim 15, wherein Tvap≤10°C, Tcon≤10°C, Tamb1≤17°C, Tamb2≤8°C.
18. A computer storage medium, wherein a control program of an air conditioner system is stored on the computer storage medium. When the control program of the air conditioner system is executed by a processor, the air conditioner as claimed in any one of claims 12 to 17 is implemented. System control methods.