Air conditioning unit

Abstract

The air conditioning unit comprises a compressor and a heat exchanger assembly, the compressor comprises a sliding valve assembly, the sliding valve assembly comprises a machine body, a sliding valve, a piston rod and a piston, an oil cavity is formed between the piston and the machine body, and the oil cavity is connected with an oil inlet pipeline and an oil outlet pipeline; wherein a flow detection piece is arranged on the oil inlet pipeline, a first oil inlet branch and a second oil inlet branch are further arranged on the oil inlet pipeline, the first oil inlet branch and the second oil inlet branch are connected in parallel, a first valve piece is arranged on the first oil inlet branch, and a second valve piece and a pressurizing piece are arranged on the second oil inlet branch; oil can be conveyed into the oil cavity through the first oil inlet branch or the second oil inlet branch so as to adjust the capacity of the compressor, the oil flow is adjusted through the pressurizing part, then the adjusting amplitude of the compressor is stabilized, and the stability of adjusting the capacity of the compressor is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to air conditioning equipment technical field especially relates to an air conditioning unit. BACKGROUND

[0002] The compressor is an important working component in the air conditioning unit, and different operating conditions of the air conditioning unit can cause fluctuations in the pressure difference between the exhaust side and the suction side of the compressor, thereby affecting the output capacity of the air conditioning unit.

[0003] When the pressure difference between the exhaust side and the suction side of the compressor fluctuates greatly, the compressor needs to be adjusted in capacity to adapt to the load demand on the use side. During the capacity adjustment of the compressor, the amount of oil delivered to the oil cavity through the oil inlet pipeline differs in the load adding (or reducing) period, thereby adjusting the exhaust volume of the refrigerant gas.

[0004] In the prior art, the adjustment of the capacity of the compressor is generally achieved by setting an electromagnetic valve on the oil inlet pipeline, and the opening and closing of the electromagnetic valve changes the amount of oil. However, the opening and closing of the electromagnetic valve can only perform on-off actions on the oil inlet pipeline, and the adjustment capacity of the oil inlet pipeline is insufficient, which cannot meet the operating requirements of the air conditioning unit under different conditions, resulting in large fluctuations in the output capacity of the compressor. SUMMARY

[0005] The utility model discloses a kind of air conditioning units, to solve the problems existing in prior art, such as the capacity of the compressor in the existing air conditioning unit mainly relies on the adjustment capacity of the adjusting valve set on oil inlet pipeline, limited adjustment range, cannot meet the operating requirements of air conditioning unit.

[0006] To achieve the above utility model purposes, the utility model adopts the following technical solutions:

[0007] The utility model provides an air conditioning unit, which comprises:

[0008] A compressor comprising a slide valve assembly, the slide valve assembly comprising a body, a slide valve, a piston rod and a piston, one end of the piston rod being connected to the piston, the other end being connected to the slide valve, the piston being movably connected in the body, an oil cavity being formed between the piston and the body, the oil cavity being connected to an oil inlet pipeline and an oil outlet pipeline;

[0009] A heat exchanger assembly comprising a condenser and an evaporator connected to the compressor by a refrigerant pipeline;

[0010] The oil inlet pipeline is provided with a flow detection member, and the oil inlet pipeline is further provided with a first oil inlet branch and a second oil inlet branch.

[0011] In some embodiments of the present application, the first valve and the second valve are both regulating valves, the first valve is used to control the on-off of the first oil inlet branch and adjust the oil flow through the first oil inlet branch within a first preset range, and the second valve is used to control the on-off of the second oil inlet branch and adjust the oil flow through the second oil inlet branch within a second preset range.

[0012] The first valve and the second valve are both regulating valves, which can not only control the on-off of the first oil inlet branch and the second oil inlet branch, but also adjust the oil flow within a certain range.

[0013] At the beginning, the first valve is opened to a preset opening degree v1, and oil is input into the oil cavity through the first oil inlet branch. When the oil flow F in the oil inlet pipeline detected by the flow detection member is equal to a preset flow F1, the first valve is controlled to maintain the current opening degree. When the oil flow in the oil inlet pipeline detected by the flow detection member is less than the preset flow, the opening degree of the first valve is increased to increase the oil flow through the first oil inlet branch. When the oil flow in the oil inlet pipeline detected by the flow detection member is greater than the preset flow, the opening degree of the first valve is reduced to reduce the oil flow through the first oil inlet branch.

[0014] In some embodiments of the present application, the first valve and the second valve are both solenoid valves, the oil inlet pipeline is further provided with a main regulating valve, the first valve is used to control the on-off of the first oil inlet branch, the second valve is used to control the on-off of the second oil inlet branch, and the regulating valve is used to adjust the oil flow through the oil inlet pipeline.

[0015] The first valve and the second valve are both solenoid valves, which are mainly used to control the on-off of the first oil inlet branch and the second oil inlet branch, and the flow through the oil inlet pipeline is adjusted by the main regulating valve.

[0016] In some embodiments of the present application, the oil outlet pipeline is provided with a third valve, and the third valve is a solenoid valve used to control the on-off of the oil outlet pipeline.

[0017] When the oil cavity returns oil, the third valve is closed, the oil outlet pipeline forms a passage, and the oil in the oil cavity is output.

[0018] In some embodiments of the present application, a controller is connected to the first valve, the second valve, the flow detection device and the main regulating valve, and is configured to receive the oil flow through the oil inlet pipeline detected by the flow detection device, adjust the opening degree of the main regulating valve, and control the opening and closing of the first valve and the second valve.

[0019] In some embodiments of the present application, the compressor is provided with an oil groove, and the controller is configured to control the main regulating valve to be fully opened and the first valve to be closed when receiving a loading signal of the compressor, so that the oil in the oil groove is input into the oil cavity through the first oil inlet branch.

[0020] In some embodiments of the present application, the controller is configured to control the main regulating valve to maintain the current opening degree when the oil flow in the oil inlet pipeline detected by the flow detection device is equal to the preset flow rate, to reduce the opening degree of the main regulating valve until the oil flow in the oil inlet pipeline is equal to the preset flow rate when the oil flow in the oil inlet pipeline is greater than the preset flow rate, and to control the first valve to be opened, the second valve to be closed and the booster to be opened when the oil flow in the oil inlet pipeline detected by the flow detection device is less than the preset flow rate, and the oil in the oil groove is input into the oil cavity through the second oil inlet branch after being boosted.

[0021] In some embodiments of the present application, the controller is configured to control the booster pump to operate at the current rotating speed when the oil flow in the oil inlet pipeline detected by the flow detection device is equal to the preset flow rate when the second oil inlet branch is in the connected state.

[0022] In some embodiments of the present application, the controller is configured to reduce the rotating speed of the booster pump until the oil flow in the oil inlet pipeline is equal to the preset flow rate when the oil flow in the oil inlet pipeline detected by the flow detection device is greater than the preset flow rate when the second oil inlet branch is in the connected state.

[0023] When the rotating speed of the booster pump is adjusted to the minimum rotating speed and the oil flow in the oil inlet pipeline is still greater than the preset flow rate, the controller is configured to control the first valve to be closed, the second valve to be opened and the booster to be stopped, so that the oil in the oil groove continues to be input into the oil cavity through the first oil inlet branch.

[0024] In another aspect, the present application also provides an air conditioning unit, which comprises:

[0025] The compressor comprises a slide valve assembly, the slide valve assembly comprises a body, a slide valve, a piston rod and a piston, one end of the piston rod is connected with the piston, the other end of the piston rod is connected with the slide valve, the piston is movably connected in the body, an oil cavity is formed between the piston and the body, and the oil cavity is connected with an oil inlet pipeline and an oil outlet pipeline;

[0026] The heat exchanger assembly comprises a condenser and an evaporator connected with the compressor through refrigerant pipelines;

[0027] The oil inlet pipeline is provided with a flow detection piece, at least one valve piece is arranged on the oil inlet pipeline, and a pressurization branch is further arranged on the oil inlet pipeline, the pressurization branch is connected with one of the valve pieces in parallel, and a pressurization piece is arranged on the pressurization branch, and the pressurization piece is used for pressurizing the oil flowing therethrough.

[0028] Compared with the prior art, the advantages and positive effects of the utility model are:

[0029] The air conditioning unit is provided with a first oil inlet branch and a second oil inlet branch on the oil inlet pipeline, the first oil inlet branch and the second oil inlet branch are connected in parallel, oil can be transported into the oil cavity through the first oil inlet branch or the second oil inlet branch to adjust the capacity of the compressor, the first oil inlet branch is provided with a first valve piece, the second oil inlet branch is provided with a second valve piece and a pressurization piece, when the oil flow value of the oil input into the oil cavity through the first oil inlet branch cannot meet the adjustment requirement of the compressor, the first valve piece is disconnected, the second valve piece on the second branch is closed, and the pressurization piece is opened, the oil flow is adjusted through the pressurization piece, and then the adjustment range of the compressor is stabilized, so that the stability of the capacity adjustment of the compressor is increased.

[0030] In addition, according to the specific operation condition, the oil flow value in the first oil inlet branch and the second oil inlet branch can be dynamically adjusted by adjusting the rotating speed of the pressurization piece and the opening size of the valve piece, the dynamic adjustment of the capacity of the compressor is realized, and the system stability is higher.

[0031] Other characteristics and advantages of the utility model will become more apparent after reading the specific implementation mode of the utility model in combination with the drawings. DRAWINGS

[0032] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be simply introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0033] Figure 1Fig. 1 is a schematic diagram of a compressor according to an embodiment connected with a first oil feeding branch and a second oil feeding branch;

[0034] Figure 2 Fig. 2 is a schematic diagram of a compressor according to an embodiment connected with a first oil feeding branch and a second oil feeding branch;

[0035] Figure 3 Fig. 3 is a schematic diagram of a first oil feeding branch, a second oil feeding branch and a slide valve assembly;

[0036] Figure 4 Fig. 4 is a schematic diagram of a controller according to an embodiment connected with each working component;

[0037] Figure 5 Fig. 5 is a schematic diagram of oil flow through a first valve in a closed state according to an embodiment;

[0038] Figure 6 Fig. 6 is a schematic diagram of oil flow through a second valve in a closed state according to an embodiment;

[0039] Figure 7 Fig. 7 is another schematic diagram of a compressor capacity adjustment;

[0040] Figure 8 Fig. 8 is a schematic diagram of a compressor capacity adjustment process according to an embodiment;

[0041] Figure 9 Fig. 9 is a schematic diagram of a compressor capacity adjustment process according to an embodiment;

[0042] Reference Signs:

[0043] 100, compressor;

[0044] 200, slide valve assembly; 210, cylinder; 211, piston; 212, oil chamber; 213, spring; 220, piston rod; 230, slide valve;

[0045] 300, oil feeding pipeline; 310, first oil feeding branch; 311, first valve; 320, second oil feeding branch; 321, pressure booster; 322, second valve; 330, main regulating valve; 340, flow detecting device; 350, pressure boosting branch;

[0046] 400, oil discharging pipeline; 410, third valve;

[0047] 500, controller. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0049] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0050] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0051] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "above", "upper" and "upper surface" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "under" and "under" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0053] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. For the sake of simplicity, the description below of the specific examples will not be exhaustive of the disclosure. Indeed, the present application can be practiced in a variety of ways. Also, the present application is not limited to the specific examples described below. Furthermore, the disclosure provides examples of various processes and materials which can be used in the making and / or practicing of the present application, but the application is not limited to those processes and materials. It is the claims, not the description, that are the measure of the breadth of the present application.

[0054] In the present application, an air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat an indoor space.

[0055] A low-temperature and low-pressure refrigerant enters the compressor, which compresses the refrigerant gas into a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0056] The expansion valve expands the high-temperature and high-pressure liquid-phase refrigerant formed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigeration effect by exchanging heat with a material to be cooled using the latent heat of evaporation of the refrigerant. Throughout the cycle, the air conditioner can adjust the temperature of the indoor space.

[0057] The outdoor unit of the air conditioner refers to the part of the refrigeration cycle including the compressor and the outdoor heat exchanger, the indoor unit of the air conditioner includes the indoor heat exchanger, and the expansion valve can be provided in the indoor unit or the outdoor unit.

[0058] The indoor heat exchanger and the outdoor heat exchanger are used as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler in a cooling mode.

[0059] Reference Figure 1 The present application provides an air conditioning unit, which comprises a compressor 100 and a heat exchanger assembly (not shown), the heat exchanger assembly comprising a condenser and an evaporator, the condenser and the evaporator being connected to the output end and the input end of the compressor 100 respectively through refrigerant pipelines.

[0060] The compressor 100 comprises a slide valve assembly 200, the slide valve assembly 200 comprising a body 210, a slide valve 230, a piston rod 220 and a piston 211, one end of the piston rod 220 being connected with the piston 211 and the other end being connected with the slide valve 230, the piston 211 being movably connected in the body 210, and an oil cavity 212 being formed between the piston 211 and the body 210, the oil cavity 212 being connected with an oil inlet pipeline 300 and an oil outlet pipeline 400.

[0061] The heat exchanger assembly comprises a condenser and an evaporator connected with the compressor 100 through refrigerant pipelines.

[0062] An electronic expansion valve (not shown) is arranged between the condenser and the evaporator.

[0063] An oil separator (not shown) is further arranged between the compressor 100 and the condenser for separating lubricating oil in refrigerant.

[0064] The electronic expansion valve and the oil separator are conventional arrangements in air conditioning units, and their specific functions and structures will not be described here.

[0065] The oil inlet pipeline 300 is provided with a flow detection piece 340, and the oil inlet pipeline 300 is further provided with a first oil inlet branch 310 and a second oil inlet branch 320, the first oil inlet branch 310 being connected in parallel with the second oil inlet branch 320, the first oil inlet branch 310 being provided with a first valve piece 311, and the second oil inlet branch 320 being provided with a second valve piece 322 and a pressure boosting piece 321.

[0066] Specifically, the two ends of the first oil inlet branch 310 and the second oil inlet branch 320 are connected to the oil inlet pipeline 300 respectively; or one of the first oil inlet branch 310 or the second oil inlet branch 320 is connected to one section of the oil inlet pipeline 300, and the other oil inlet branch of the first oil inlet branch 310 and the second oil inlet branch 320 is connected in parallel to the section of the oil inlet pipeline 300.

[0067] The first oil inlet branch 310 and the second oil inlet branch 320 are connected in parallel, and oil can be delivered to the oil cavity 212 through the first oil inlet branch 310 or the second oil inlet branch 320 to adjust the capacity of the compressor 100.

[0068] The first oil inlet branch 310 is provided with the first valve piece 311, and the second oil inlet branch 320 is provided with the second valve piece 322 and the pressure boosting piece 321, when the oil flow value of the oil input to the oil cavity 212 through the first oil inlet branch 310 cannot meet the adjustment requirement of the compressor 100, the first oil inlet branch 310 is disconnected through the first valve piece 311, the second oil inlet branch 320 is connected through the second valve piece 322, and the pressure boosting piece 321 is opened, the oil flow is increased through the pressure boosting piece 321, and then the adjustment range of the compressor 100 is increased, so as to increase the capacity adjustment range of the compressor 100.

[0069] With reference to the foregoing Figure 1 In some embodiments of the present application, the first valve 311 and the second valve 322 are both regulating valves, the first valve 311 is used to control the on-off of the first oil inlet branch 310 and regulate the oil flow through the first oil inlet branch 310 within a first preset range; the second valve 322 is used to control the on-off of the second oil inlet branch 320 and regulate the oil flow through the second oil inlet branch 320 within a second preset range.

[0070] At the beginning, the first valve 311 is opened to a preset opening degree v, and the oil is input into the oil cavity 212 through the first oil inlet branch 310; when the oil flow F detected by the flow detection member 340 in the oil inlet pipeline 300 is equal to the preset flow F1, the control of the first valve 311 is maintained at the current opening degree.

[0071] When the oil flow in the oil inlet pipeline 300 detected by the flow detection member 340 is less than the preset flow, the opening degree of the first valve 311 is increased by a unit adjustment opening degree Δv to increase the oil flow through the first oil inlet branch 310, until the oil flow F detected by the flow detection member 340 in the oil inlet pipeline 300 is equal to the preset flow F1.

[0072] When the oil flow in the oil inlet pipeline 300 detected by the flow detection member 340 is greater than the preset flow, the opening degree of the first valve 311 is reduced by a unit adjustment opening degree Δv to reduce the oil flow through the first oil inlet branch 310, until the oil flow F detected by the flow detection member 340 in the oil inlet pipeline 300 is equal to the preset flow F1.

[0073] With reference to the foregoing Figure 2 、 Figure 3 In some other embodiments of the present application, the first valve 311 and the second valve 322 are both solenoid valves, and a main regulating valve 330 is further arranged on the oil inlet pipeline 300, the first valve 311 is used to control the on-off of the first oil inlet branch 310, the second valve 322 is used to control the on-off of the second oil inlet branch 320, and the main regulating valve 330 is used to regulate the oil flow through the oil inlet pipeline 300.

[0074] The first valve 311 and the second valve 322 are both solenoid valves, which are mainly used to control the on-off of the first oil inlet branch 310 and the second oil inlet branch 320, and the flow through the oil inlet pipeline 300 is regulated by the main regulating valve 330.

[0075] The controller 500 is connected with the first valve 311, the second valve 322, the flow detection member 340 and the main regulating valve 330, and is configured to receive the oil flow detected by the flow detection member 340, adjust the opening degree of the main regulating valve 330, and control the opening and closing of the first valve 311 and the second valve 322.

[0076] In some embodiments of the present application, the compressor 100 is provided with an oil tank, and the controller 500 is configured to control the main regulating valve 330 to be fully opened and the first valve 311 to be closed when receiving a loading signal of the compressor 100, so that the oil in the oil tank is input into the oil cavity 212 through the first oil inlet branch 310. Figure 5 Figure 8 In some embodiments of the present application, the controller 500 is configured to control the main regulating valve 330 to maintain the current opening degree when the oil flow in the oil inlet pipeline 300 detected by the flow detection member 340 is equal to the preset flow.

[0077] When the oil flow in the oil inlet pipeline 300 is greater than the preset flow, the opening degree of the main regulating valve 330 is adjusted by a unit regulating opening degree △v1 until the oil flow in the oil inlet pipeline 300 is equal to the preset flow. After a certain period of operation, if the oil flow in the oil inlet pipeline 300 is less than the preset flow after the main regulating valve 330 is adjusted, the opening degree of the main regulating valve 330 is increased by a unit regulating opening degree △v2 until the oil flow in the oil inlet pipeline 300 is equal to the preset flow. The △v1 and the △v2 can be equal or not equal.

[0078] In some embodiments of the present application, the controller 500 is configured to control the main regulating valve 330 to maintain the current opening degree when the oil flow in the oil inlet pipeline 300 detected by the flow detection member 340 is equal to the preset flow.

[0079] In some embodiments of the present application, the controller 500 is configured to control the main regulating valve 330 to maintain the current opening degree when the oil flow in the oil inlet pipeline 300 detected by the flow detection member 340 is equal to the preset flow. Figure 6 Figure 9 In some embodiments of the present application, the controller 500 is configured to control the main regulating valve 330 to maintain the current opening degree when the oil flow in the oil inlet pipeline 300 detected by the flow detection member 340 is equal to the preset flow.

[0080] In some embodiments of the present application, the controller 500 is configured to control the main regulating valve 330 to maintain the current opening degree when the oil flow in the oil inlet pipeline 300 detected by the flow detection member 340 is equal to the preset flow.

[0081] ​​In some embodiments of the present application, the controller 500 is configured to reduce the rotating speed of the booster pump by a preset rotating speed value Δn1 when the oil flow in the oil inlet pipeline 300 detected by the flow detection member 340 is greater than the preset flow, until the oil flow in the oil inlet pipeline 300 is equal to the preset flow.

[0082] When the rotating speed of the booster pump is adjusted to the minimum rotating speed and the oil flow in the oil inlet pipeline 300 is still greater than the preset flow, the controller 500 is configured to control the first valve member 311 to close, the second valve member 322 to open, and the booster member 321 to stop, so that the oil in the oil tank continues to be input into the oil cavity 212 through the first oil inlet branch 310.

[0083] In some embodiments of the present application, the controller 500 is configured to increase the rotating speed of the booster pump by a preset rotating speed value Δn2 when the oil flow in the oil inlet pipeline 300 detected by the flow detection member 340 is less than the preset flow, until the oil flow in the oil inlet pipeline 300 is equal to the preset flow, wherein the values of Δn1 and Δn2 can be equal or not equal.

[0084] The compressor 100 is specifically a screw compressor 100, which has the advantages of high reliability, convenient operation and maintenance, good power balance, and strong adaptability.

[0085] The capacity adjustment system of the screw compressor 100 is composed of a cylinder body 210, an adjustment slide valve 230, a piston 211, a piston rod 220, and a return spring.

[0086] The cylinder body 210 is formed with an oil tank, and the piston 211 is movably arranged in the oil tank. The slide valve 230 is connected with the piston 211 through the piston rod 220, and the piston 211 in the piston 211 cylinder is pushed by oil pressure.

[0087] The lubricating oil in the oil tank is connected with an oil supply member through an oil inlet pipeline 300, and the oil inlet pipeline 300 is provided with a loading valve. In the open state of the loading valve, the oil supply member supplies oil to the oil tank through the oil inlet pipeline 300, the return spring is compressed, the piston 211 moves to the left, and at the same time, the slide valve 230 is driven to move to the left. At this time, the effective compression volume in the compression chamber increases, which means that the exhaust capacity of the refrigerant gas increases, and the corresponding refrigerating capacity also increases.

[0088] In some embodiments of the present application, a third valve member 410 is arranged on the oil outlet pipeline 400, and the third valve member 410 is an electromagnetic valve for controlling the on-off of the oil outlet pipeline 400.

[0089] The third valve member 410 is an unloading valve, and when the oil cavity 212 returns oil, the third valve member 410 is closed, and the oil outlet pipeline 400 forms a passage to output the oil in the oil cavity 212.

[0090] When the third valve 410 is energized, high pressure oil is bypassed to the suction side, under the action of the return spring, the piston 211 and the slide valve 230 move to the right side, a part of the refrigerant gas is bypassed from the compression chamber to the suction side, so that the exhaust volume of the refrigerant is reduced, and the refrigeration capacity is reduced.

[0091] The input end of the compressor 100 is provided with a suction pressure sensor, and the output end is provided with an exhaust pressure sensor, the suction pressure sensor is used to detect the suction pressure P of the compressor 100, and the exhaust pressure sensor is used to detect the exhaust pressure P of the compressor 100.

[0092] The suction and exhaust pressure difference ΔP = exhaust pressure P - suction pressure P.

[0093] The suction and exhaust pressure difference ΔP is one of the judgment ways of the loading demand of the compressor 100, when the suction and exhaust pressure difference ΔP exceeds the preset value, the controller 500 controls the compressor 100 to load.

[0094] The booster 321 involved in the present application is a variable frequency booster pump.

[0095] Next, combined with Figure 8 、 Figure 9 , the loading process of the compressor 100 is further described:

[0096] When the compressor 100 has loading demand, execute S11: the main regulating valve 330 is fully opened, the first valve 311 is energized, the second valve 322 and the third valve 410 are not energized, the booster 321 is not started, the oil in the oil tank enters the oil chamber 212 through the oil inlet pipeline 300 and the first oil inlet branch 310, passes through the first valve 311, the main regulating valve 330 and the flow detection piece 340, drives the piston 211, the piston 211 is compressed under the action of the oil pressure, and the slide valve 230 is driven to move to the right through the piston rod 220, at this time the flow detection piece 340 will detect the oil flow value F, refer to processes S16, S17, when F is equal to the preset flow value F1, all the main regulating valves 330 remain the current state.

[0097] Referring to processes S12-S15, when F is greater than the preset flow value F1, the controller 500 outputs a signal to the main regulating valve 330 to perform closing action, during the closing action, when the flow detection piece 340 detects that the oil flow value F is equal to F1, the main regulating valve 330 stops closing action and keeps the current opening degree, and the remaining valves also keep the current state.

[0098] When the flow detecting member 340 detects that the oil flow value F2 is less than F1, the controller 500 outputs a signal to the main regulating valve 330 to open the valve. During the opening process, when the flow detecting member 340 detects that the oil flow value F is equal to F1, the main regulating valve 330 stops the opening process and maintains the current opening degree, and the other valve members also maintain the current state.

[0099] With reference to processes S18 and S19, when the main regulating valve 330 is in the fully open state and the flow detecting member 340 detects that the oil flow value F is less than F1, the controller 500 outputs a signal to close the first valve member 311, power on the second valve member 322, start the pressure boosting member 321, and gradually increase the rotation speed of the pump. When the flow detecting member 340 detects that the oil flow value F2 is equal to F1, the pressure boosting member 321 maintains the current rotation speed, and the other valve members also maintain the current state.

[0100] With reference to process S21, in the state of the pressure boosting member 321 being started, and with reference to S22, when the flow detecting member 340 detects that the oil flow value F is greater than F1, the controller 500 determines whether the rotation speed of the pressure boosting member 321 is the minimum rotation speed. If yes, with reference to S25, the controller 500 controls the second valve member 322 to open, the pressure boosting member 321 to close, the main regulating valve 330 to fully open, and the first valve member 311 to close. If no, with reference to S24, the controller 500 outputs a signal to gradually decrease the rotation speed of the pressure boosting member 321. During the process, when the flow detecting member 340 detects that the oil flow value F is equal to F1, the pressure boosting member 321 maintains the current rotation speed, and the other valve members also maintain the current state.

[0101] If the rotation speed of the pressure boosting member 321 decreases to the minimum, and the flow detecting member 340 detects that the oil flow value F is greater than F1, the controller 500 outputs a signal to close the second valve member 322, open the first valve member 311, and close the pressure boosting member 321.

[0102] In the state of the pressure boosting member 321 being started, with reference to S28 and S29, when the flow detecting member 340 detects that the oil flow value F is equal to F1, the pressure boosting member 321 maintains the current rotation speed, and the other valve members also maintain the current state.

[0103] In the state of the pressure boosting member 321 being started, with reference to processes S30-S33, when the flow detecting member 340 detects that the oil flow value F is less than F1, the controller 500 outputs a signal to gradually increase the rotation speed of the pressure boosting member 321. During the process, when the flow detecting member 340 detects that the oil flow value F is equal to F1, the pressure boosting member 321 maintains the current rotation speed, and the other valve members also maintain the current state.

[0104] On the other hand, in combination Figure 7 The application further provides an air conditioning unit, which comprises:

[0105] The compressor 100 comprises a slide valve assembly 200, the slide valve assembly 200 comprising a body 210, a slide valve 230, a piston rod 220, and a piston 211, one end of the piston rod 220 being connected to the piston 211 and the other end being connected to the slide valve 230, the piston 211 being movably connected in the body 210, an oil cavity 212 being formed between the piston 211 and the body 210, the oil cavity 212 being connected with an oil inlet pipeline 300 and an oil outlet pipeline 400;

[0106] The heat exchanger assembly comprises a condenser and an evaporator connected with the compressor 100 through refrigerant pipelines;

[0107] The oil inlet pipeline 300 is provided with a flow detection member 340, the oil inlet pipeline 300 is provided with at least one valve member, and the oil inlet pipeline 300 is further provided with a pressurization branch 350, the pressurization branch 350 being connected in parallel with one of the valve members, and the pressurization branch 350 is provided with a pressurization member 321, the pressurization member 321 being used for pressurizing the oil flowing therethrough.

[0108] In some embodiments of the present application, the oil inlet pipeline 300 comprises two valve members, defined as a first valve member 311 and a second valve member 322, and the pressurization branch 350 is provided in parallel with the first valve member 311.

[0109] The first valve member 311 and the second valve member 322 are both regulating valves.

[0110] When the compressor 100 has a loading demand, the first valve member 311 and the valve member are powered on, and the opening degree of the first valve member 311 or the second valve member 322 is adjusted to the maximum, and the opening degree of the other valve member is adjusted to v', the pressurization member 321 is not started, the oil in the oil groove enters the oil cavity 212 through the oil inlet pipeline 300, pushes the piston 211, and the piston 211 compresses the spring member 213 to the right under the action of oil pressure, and drives the slide valve 230 to move to the right through the piston rod 220, at this time, the flow detection member 340 detects the oil flow value F, and when F is equal to the preset flow value F1, all the main regulating valves 330 remain in the current state.

[0111] Taking the first valve member 311 as an example, when F is greater than the preset flow value F1, the controller 500 outputs a signal to the second valve member 322 to perform a closing action, and during the closing action, when the flow detection member 340 detects that the oil flow value F is equal to F1, the main regulating valve 330 stops the closing action and remains in the current opening degree, and the remaining valve members also remain in the current state.

[0112] When the flow detection member 340 detects that the oil flow value F2 flowing through is less than F1, the controller 500 outputs a signal to the second valve member 322 to perform the valve opening operation. During the valve opening operation, when the flow detection member 340 detects that the oil flow value F flowing through is equal to F1, the main regulating valve 330 stops the valve opening operation and maintains the current opening degree, and the remaining valve members also maintain the current state.

[0113] When the first valve member 311 and the second valve member 322 are both in the fully open state, and the flow detection member 340 detects that the oil flow value F flowing through is less than F1, the controller 500 outputs a signal, the first valve member 311 is disconnected, the second valve member 322 remains powered on, the pressure boosting member 321 is started, and the speed of the pump is gradually increased. When the flow detection member 340 detects that the oil flow value F2 flowing through is equal to F1, the pressure boosting member 321 maintains the current speed, and the remaining valve members also maintain the current state.

[0114] In the state of the pressure boosting member 321 being started, when the flow detection member 340 detects that the oil flow value F flowing through is greater than F1, the controller 500 outputs a signal to the pressure boosting member 321 to gradually reduce the speed of the pressure boosting member 321. During this process, when the flow detection member 340 detects that the oil flow value F flowing through is equal to F1, the pressure boosting member 321 maintains the current speed, and the remaining valve members also maintain the current state.

[0115] If the speed of the pressure boosting member 321 is reduced to the minimum, and the flow detection member 340 detects that the oil flow value F flowing through is greater than F1, the controller 500 outputs a signal, the second valve member 322 is closed, the first valve member 311 is opened, and the pressure boosting member 321 is closed.

[0116] In combination Figure 2 , on the other hand, a valve member is included on the oil inlet pipeline 300, defined as the first valve member 311, the pressure boosting branch 350 is arranged in parallel with the first valve member 311, and the pressure boosting branch 350 is provided with the second valve member 322 and the pressure boosting member 321.

[0117] The first valve member 311 and the second valve member 322 are both solenoid valves. The first valve member 311 is used to control the opening and closing of the section of the oil inlet pipeline 300 in parallel with the pressure boosting branch 350, and the second valve member 322 is used to control the opening and closing of the pressure boosting branch 350.

[0118] The oil inlet pipeline 300 is also provided with the main regulating valve 330, which is used to regulate the flow through the oil inlet pipeline 300.

[0119] The air conditioning unit involved in the present application can dynamically adjust the oil flow value in the first oil inlet branch 310 and the second oil inlet branch 320 by adjusting the speed of the pressure boosting member 321 and the size of the valve opening, and can achieve dynamic adjustment of the capacity of the compressor 100, and the system has stronger stability.

[0120] As long as possible, the various aspects and features described and illustrated in the specification can be applied individually, and these individual aspects can be the subject of a divisional application.

[0121] In the description of the above-described embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0122] The above is merely specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An air conditioning unit, comprising: The air conditioning unit comprises: a compressor comprising a slide valve assembly, the slide valve assembly comprising a body, a slide valve, a piston rod and a piston, one end of the piston rod being connected with the piston and the other end being connected with the slide valve, the piston being movably connected in the body, an oil cavity being formed between the piston and the body, an oil inlet pipeline and an oil outlet pipeline being connected with the oil cavity; a heat exchanger assembly comprising a condenser and an evaporator connected with the compressor through refrigerant pipelines; wherein a flow detection member is arranged on the oil inlet pipeline, a first oil inlet branch and a second oil inlet branch are further arranged on the oil inlet pipeline, the first oil inlet branch and the second oil inlet branch are connected in parallel, a first valve member is arranged on the first oil inlet branch, and a second valve member and a pressure booster are arranged on the second oil inlet branch.

2. The air conditioning unit according to claim 1, wherein the first valve member and the second valve member are both regulating valves, the first valve member is used for controlling the on-off of the first oil inlet branch and regulating the oil amount passing through the first oil inlet branch within a first preset range, and the second valve member is used for controlling the on-off of the second oil inlet branch and regulating the oil amount passing through the second oil inlet branch within a second preset range.

3. The air conditioning unit according to claim 2, wherein the first valve member and the second valve member are both solenoid valves, a main regulating valve is further arranged on the oil inlet pipeline, the first valve member is used for controlling the on-off of the first oil inlet branch, the second valve member is used for controlling the on-off of the second oil inlet branch, and the regulating valve is used for regulating the oil amount passing through the oil inlet pipeline.

4. The air conditioning unit according to claim 1, wherein a third valve member is arranged on the oil outlet pipeline, the third valve member is a solenoid valve and is used for controlling the on-off of the oil outlet pipeline.

5. The air conditioning unit according to claim 3, further comprising a controller, the controller being connected with the first valve member, the second valve member, the flow detection member and the main regulating valve, the controller being used for receiving the oil amount passing through the oil inlet pipeline detected by the flow detection member, regulating the opening degree of the main regulating valve and controlling the on-off of the first valve member and the second valve member.

6. The air conditioning unit according to claim 5, wherein an oil groove is arranged in the compressor, and the controller is configured to control the main regulating valve to be fully opened and the first valve member to be closed when receiving a loading signal of the compressor, so that the oil in the oil groove is input into the oil cavity through the first oil inlet branch.

7. The air conditioning unit according to claim 6, wherein ​ The controller is configured to control the main regulating valve to maintain the current opening degree when the oil flow in the oil inlet pipeline detected by the flow detection member is equal to the preset flow, to reduce the opening degree of the main regulating valve until the oil flow in the oil inlet pipeline is equal to the preset flow when the oil flow in the oil inlet pipeline is greater than the preset flow, and to control the first valve member to open, the second valve member to close, and the booster member to open when the oil flow in the oil inlet pipeline detected by the flow detection member is less than the preset flow, and the oil in the oil tank is input into the oil cavity after being boosted by the second oil inlet branch.

8. The air conditioning unit of claim 7, wherein, The controller is configured to control the booster member to operate at the current rotating speed when the oil flow in the oil inlet pipeline detected by the flow detection member is equal to the preset flow when the second oil inlet branch is in the connected state.

9. The air conditioning unit of claim 7, wherein, The controller is configured to reduce the rotating speed of the booster member until the oil flow in the oil inlet pipeline is equal to the preset flow when the oil flow in the oil inlet pipeline detected by the flow detection member is greater than the preset flow when the second oil inlet branch is in the connected state. When the rotating speed of the booster member is adjusted to the minimum rotating speed and the oil flow in the oil inlet pipeline is still greater than the preset flow, the controller is configured to control the first valve member to close, the second valve member to open, and the booster member to stop, so that the oil in the oil tank continues to be input into the oil cavity through the first oil inlet branch.

10. An air conditioning unit characterized by, Comprises: A compressor comprising a slide valve assembly, the slide valve assembly comprising a body, a slide valve, a piston rod, and a piston, one end of the piston rod being connected with the piston and the other end being connected with the slide valve, the piston being movably connected in the body, an oil cavity being formed between the piston and the body, the oil cavity being connected with an oil inlet pipeline and an oil outlet pipeline; A heat exchanger assembly comprising a condenser and an evaporator connected with the compressor through a refrigerant pipeline; The oil inlet pipeline is provided with a flow detection member, the oil inlet pipeline is provided with at least one valve member, and the oil inlet pipeline is further provided with a booster branch, the booster branch being connected with one of the valve members in parallel, the booster branch being provided with a booster member, and the booster member being used for boosting the oil flowing therethrough.

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