Air conditioning system

Abstract

The utility model relates to the technical field of air conditioners, in particular to an air conditioning system, and aims to solve the problems that an existing air conditioning system is long in starting time and poor in user experience. In order to achieve the purpose, the air conditioning system comprises a compressor, an air storage tank and a control valve, the compressor is provided with an air supply port, an exhaust port of the air storage tank is connected to the air supply port through a first pipeline, the control valve is arranged on the first pipeline, and when the compressor is shut down, the air supply port of the air storage tank is connected to the control valve. The control valve is closed after the first preset duration, when the compressor is shut down, the refrigerant in the air storage tank cannot migrate, and it is guaranteed that enough refrigerant exists in the air storage tank; during next starting, if the pressure is large enough, direct starting can be achieved; if the pressure is not large enough, the gas storage tank is started after the refrigerant in the gas storage tank is heated, and the refrigerant does not need to be pumped into the gas storage tank; the air conditioning system can be quickly started as much as possible through the control valve, and the experience feeling of a user is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning technical field, concretely provides a kind of air conditioning system. BACKGROUND

[0002] Gas suspension compressor is particularly suitable for application in refrigeration system due to its high speed, oil-free, high efficiency, low noise, micro-vibration, small volume and the advantages of basically no maintenance.

[0003] But gas suspension compressor needs to be equipped with gas supply system to supply gas for it at any time, to make gas suspension compressor gas bearing suspension, and the force of bearing suspension comes from the pressure difference between gas tank pressure and compressor cavity pressure. However, after the compressor is shut down, the refrigerant in the gas tank will migrate, resulting in a small pressure difference between the gas tank and the compressor cavity. When starting again, the pressure difference between the liquid tank and the cavity needs to be established first to ensure that the gas bearing can be suspended.

[0004] The establishment of pressure difference includes two parts. First, the gas tank needs a certain amount of liquid level refrigerant. If the liquid level is not enough, the refrigerant pump needs to be opened to pump refrigerant into the gas tank. Second, after the gas tank has a certain amount of liquid level refrigerant, the electric heating is turned on to increase the pressure in the tank. It takes a long time to establish the pressure difference, which increases the start-up time of the compressor, i.e. increases the start-up time of the air conditioning system, making the user experience poor.

[0005] Therefore, an air conditioning system is needed to solve the above technical problems. UTILITY MODEL CONTENTS

[0006] The utility model aims to solve the above technical problems, i.e. to solve the problem of long start-up time of existing air conditioning system and poor user experience.

[0007] In a first aspect, the utility model provides an air conditioning system, which comprises a compressor, a gas tank and a control valve. The compressor is provided with a gas supplement port. The gas outlet of the gas tank is connected to the gas supplement port through a first pipeline. The control valve is arranged on the first pipeline. The control valve is closed after a first predetermined time when the compressor is shut down.

[0008] In the specific embodiment of the above air conditioning system, the air conditioning system further comprises a first check valve arranged on the first pipeline. The first check valve is configured to allow refrigerant to flow only from the gas tank to the compressor.

[0009] In the specific embodiment of the above air conditioning system, the air conditioning system further comprises a condenser. The first side of the condenser is in communication with the gas inlet side of the gas tank through a second pipeline. A second check valve is arranged on the second pipeline. The second check valve is configured to allow refrigerant to flow only from the condenser to the gas tank.

[0010] In the specific embodiment of the air conditioning system, the air conditioning system further comprises a delivery pump arranged on the second pipeline, and the delivery pump is used to deliver the refrigerant of the condenser to the gas tank.

[0011] In the specific embodiment of the air conditioning system, the delivery pump is a gear pump.

[0012] In the specific embodiment of the air conditioning system, the air conditioning system further comprises a filter arranged on the second pipeline and located upstream of the delivery pump.

[0013] In the specific embodiment of the air conditioning system, the control valve is an electromagnetic valve or an electric ball valve.

[0014] In the specific embodiment of the air conditioning system, the gas tank is provided with a pressure detection member used to detect the pressure in the gas tank.

[0015] In the specific embodiment of the air conditioning system, the gas tank is provided with a heater used to heat the refrigerant in the gas tank.

[0016] In the specific embodiment of the air conditioning system, the air conditioning system further comprises an evaporator, and a first side of the condenser is communicated with a first side of the evaporator through a third pipeline; and the third pipeline is provided with a throttling device.

[0017] In the case of adopting the technical scheme, the air conditioning system of the utility model comprises a compressor, a gas tank and a control valve, the compressor is provided with a gas supplement port, the gas outlet of the gas tank is connected to the gas supplement port through a first pipeline, the control valve is arranged on the first pipeline, and the control valve is closed after a first preset time length when the compressor is shut down. After the control valve is closed, the refrigerant in the gas tank cannot flow outwards, that is, when the compressor is shut down, the refrigerant will not migrate, and enough refrigerant is ensured in the gas tank. When the compressor is started next time, if the pressure is large enough, the compressor can be directly started; if the pressure is not large enough, the refrigerant in the gas tank can be directly heated, and the refrigerant does not need to be pumped to the gas tank, so that the preparation time of the compressor is shortened, that is, the starting time of the compressor is shortened; the air conditioning system can be started as quickly as possible, and the experience of users is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] The preferred embodiments of the utility model are described below in combination with the drawings, and the drawings are as follows:

[0019] Figure 1 is the structural schematic view of the air conditioning system provided by the utility model.

[0020] LIST OF REFERENCE NUMERALS:

[0021] 1, compressor; 2, gas tank; 21, control valve; 22, first check valve; 23, second check valve; 24, delivery pump; 25, filter; 26, liquid capsule electric heater; 27, pressure sensor; 28, liquid level gauge; 29, safety valve; 3, condenser; 31, third check valve; 4, throttling device; 5, evaporator; 51, butterfly valve; 61, first pipeline; 62, second pipeline; 63, fifth pipeline; 64, third pipeline; 65, sixth pipeline; 66, fourth pipeline. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art will understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0023] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the direction or positional relationship of the terms based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and is not intended to indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0024] In addition, it should also be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] In order to solve the problem that the existing air conditioning system has a long starting time and poor user experience, as shown in Figure 1 As shown in the figure, the present embodiment discloses an air conditioning system, which comprises a compressor 1, a gas tank 2, a control valve 21, a condenser 3, an evaporator 5, a delivery pump 24, a filter 25 and a throttling device 4.

[0026] Among them, the exhaust port of the compressor 1 is connected to the second side of the condenser 3 through the fifth pipeline 63, and the third check valve 31 is arranged on the fifth pipeline 63, and the third check valve 31 is configured to allow the refrigerant to flow from the compressor 1 to the condenser 3 only, and the high-temperature and high-pressure refrigerant is condensed in the condenser 3 to become liquid refrigerant.

[0027] The first side of the condenser 3 is communicated with the first side of the evaporator 5 through a third pipeline 64; the throttling device 4 is arranged on the third pipeline 64. The throttling device 4 is used for controlling the amount of refrigerant flowing to the evaporator 5. The throttling device 4 is specifically an electronic expansion valve.

[0028] It needs to be explained that, although the throttling device 4 is specifically an electronic expansion valve in the embodiment, this is not a limitation of the utility model, and in other embodiments, the person skilled in the art can select the throttling device 4 to be a capillary, a thermal expansion valve, an orifice plate or a nozzle, etc., which can all play a throttling role and do not deviate from the basic principle of the utility model, and will fall within the protection scope of the utility model.

[0029] The suction port of the compressor 1 is connected with the second side of the evaporator 5 through a sixth pipeline 65, and the low-pressure gaseous refrigerant in the evaporator 5 can flow back to the compressor 1 to be compressed again. A butterfly valve 51 is arranged on the sixth pipeline 65.

[0030] The compressor 1 is specifically an air suspension compressor 1, which needs to supplement the refrigerant for the compressor 1 at any time during the operation process, so that the air suspension bearing can be suspended, and the air suspension compressor 1 can operate normally.

[0031] The compressor 1 is provided with a makeup air port, and the exhaust port of the gas storage tank 2 is connected to the makeup air port through a first pipeline 61. The pressure in the gas storage tank 2 is greater than the pressure in the cavity of the compressor 1, so that the gas storage tank 2 can deliver the refrigerant to the cavity of the compressor 1, to ensure that the air suspension bearing is suspended.

[0032] The air conditioning system further comprises a first one-way valve 22 and a second one-way valve 23. The first one-way valve 22 is arranged on the first pipeline 61 and is configured to allow the refrigerant to flow from the gas storage tank 2 to the compressor 1 only. The first side of the condenser 3 is communicated with the gas inlet side of the gas storage tank 2 through a second pipeline 62, and the second one-way valve 23 is arranged on the second pipeline 62 and is configured to allow the refrigerant to flow from the condenser 3 to the gas storage tank 2 only. The purpose of arranging the first one-way valve 22 and the second one-way valve 23 is to ensure that the refrigerant in the gas storage tank 2 can only flow to the compressor 1, and to ensure the pressure difference between the gas storage tank 2 and the compressor 1 as much as possible.

[0033] The control valve 21 is arranged on the first pipeline 61, and the control valve 21 is kept in an open state during the operation of the compressor 1, to ensure that the gas storage tank 2 can supplement the refrigerant for the compressor 1 at any time, so that the air suspension bearing is suspended. When the compressor 1 is shut down, the control valve 21 is closed after a first preset time.

[0034] Specifically, when the speed of the compressor 1 drops to 0, the control valve 21 can be immediately closed to retain the refrigerant in the gas tank 2 and ensure that the pressure in the gas tank 2 will not be lost; the value of the first preset time length at this time is 0. It can also be set to delay closing, for example, delay closing for the first preset time length, in which case the value of the first preset time length is greater than 0; for example, delay closing for 3s or 5s. Although this may cause a certain loss of refrigerant in the gas tank 2, the loss is small, and the pressure difference between the gas tank 2 and the compressor 1 cavity can still be guaranteed. After the control valve 21 is closed, the refrigerant in the gas tank 2 cannot flow out, that is, when the compressor 1 is shut down, the refrigerant will not migrate, ensuring that there is enough refrigerant in the gas tank 2 to participate in the next startup of the compressor 1.

[0035] When the compressor 1 is restarted, since there is enough refrigerant in the gas tank 2, if the pressure is high enough, the compressor 1 can be started directly; if the pressure is not high enough, but the amount of refrigerant is sufficient, it is only necessary to heat the refrigerant in the gas tank 2, and then restart the compressor 1 after heating; by intercepting the control valve 21, the preparation time for starting the compressor 1 is shortened, that is, the startup time of the compressor 1 is shortened.

[0036] When the pressure in the gas tank 2 is sufficient, the control valve 21 is opened first before the compressor 1 is started, so that the refrigerant in the gas tank 2 enters the machine cavity, driving the air bearing to suspend. Specifically, the control valve 21 can be opened in advance of the second preset time, wherein the second preset time is 5s. It should be noted that the second preset time is 5s in this embodiment, but this is not a limitation of the present invention. Without departing from the principle of the present invention, in other embodiments, those skilled in the art can choose the second preset time to be 3s or 8s, etc., as long as the air bearing can be suspended before the compressor 1 is started. This does not deviate from the basic principle of the present invention and will fall within the scope of protection of the present invention.

[0037] When the pressure in the gas tank 2 is insufficient, the refrigerant in the gas tank 2 can be heated by electric heating. After the pressure in the gas tank 2 meets the conditions, the control valve 21 is opened, and then the compressor 1 is started after the second preset time.

[0038] The control valve 21 is an electromagnetic valve, which is in communication connection with a main control board of the air conditioning system and is controlled by the main control board to be opened or closed. Specifically, when the main control board receives a start instruction, the electromagnetic valve is first controlled to be opened to allow the gas tank 2 to supply refrigerant to the machine cavity to drive the gas floating bearing to be suspended; then the compressor 1 is started after a second preset time, and since the gas floating bearing is in a suspended state, the compressor 1 can be started normally and the gas floating bearing will not be damaged. When the main control board receives a shutdown instruction, the compressor 1 is first controlled to be shut down, and then the electromagnetic valve is closed after the rotating speed of the compressor 1 is reduced to 0, so that the refrigerant in the gas tank 2 can be kept in the gas tank 2 after the air conditioning system is shut down, and migration will not occur, to ensure that the compressor 1 can be started quickly next time.

[0039] It should be noted that although the control valve 21 is an electromagnetic valve in the embodiment, this is not a limitation of the utility model, and within the principle of the utility model, those skilled in the art can select an electric ball valve in other embodiments, which can also control whether the gas tank 2 supplies refrigerant to the compressor 1, which does not deviate from the basic principle of the utility model and falls within the protection scope of the utility model.

[0040] The delivery pump 24 is arranged on the second pipeline 62 and is used to deliver the refrigerant in the condenser 3 to the gas tank 2; since the pressure of the refrigerant in the condenser 3 is limited, and the gas tank 2 needs to ensure a relatively high pressure relative to the machine cavity to supply refrigerant to the machine cavity to make the gas floating bearing suspended. The delivery pump 24 is a gear pump, which can increase the pressure and can deliver the liquid refrigerant in the condenser 3 to the gas tank 2.

[0041] The filter 25 is arranged on the second pipeline 62 and is located upstream of the delivery pump 24. The filter 25 filters the refrigerant to avoid impurities from entering the delivery pump 24 to damage the delivery pump 24 and the compressor 1. Since the gear pump has a relatively high requirement for the purity of the delivery medium, the filter 25 can be arranged to ensure that the gear pump is not damaged.

[0042] The gas tank 2 is provided with a safety valve 29, which can control the pressure of the gas tank 2 to be kept below a preset pressure to avoid safety accidents such as tank explosion due to excessive pressure. The gas tank 2 is also provided with a pressure detection member for detecting the pressure in the gas tank 2. The pressure detection member is specifically a pressure sensor 27, which is in communication connection with the main control board and can transmit the detected pressure to the main control board in real time. When it is detected that the pressure is too large, the main control board can control the delivery pump 24 to reduce the delivery capacity or increase the opening degree of the control valve 21 to reduce the pressure of the gas tank 2.

[0043] The gas storage tank 2 is further provided with a heater for heating the refrigerant in the gas storage tank 2, wherein the heater is specifically a liquid capsule electric heater 26, which is used for heating the refrigerant in the gas storage tank 2 to increase the pressure in the gas storage tank 2, so as to ensure that the pressure difference between the gas storage tank 2 and the compressor 1 reaches a set value, and the refrigerant delivered by the gas storage tank 2 can drive the gas floating bearing to suspend, so as to meet the starting condition of the compressor 1.

[0044] The gas storage tank 2 is further provided with a liquid level gauge 28 for detecting the liquid level in the gas storage tank 2, and the power of the delivery pump 24 and the opening degree of the control valve 21 can be controlled according to the detected liquid level, so as to control the liquid level in the gas storage tank 2 to be kept at a reasonable level.

[0045] The relief port of the compressor 1 is connected to the evaporator 5 through a fourth pipeline 66. When the pressure in the cavity of the compressor 1 is too high, the compressor 1 needs to be relieved to avoid safety accidents caused by too high pressure in the cavity. When the pressure in the cavity is too high, the gaseous refrigerant is discharged to the evaporator 5, so as to reduce the pressure in the cavity to ensure that the pressure in the cavity will not be too high.

[0046] When the air conditioning system receives a start instruction from the main control board, the main control board firstly controls the electromagnetic valve to open, so that the gas storage tank 2 supplements the refrigerant to the cavity to drive the gas floating bearing to suspend; then the compressor 1 is started after a second preset time, and the refrigerant is compressed to make the compressor 1 deliver high-temperature and high-pressure refrigerant to the condenser 3 to be condensed in the condenser 3; part of the refrigerant in the condenser 3 is delivered to the gas storage tank 2 through the delivery pump 24, so that the gas storage tank 2 can continuously deliver refrigerant to the cavity of the compressor 1 to ensure that the gas floating bearing is always in a suspended state during the operation of the compressor 1. Another part of the refrigerant flows to the evaporator 5 through the throttling device 4, wherein the refrigerant flowing to the evaporator 5 is most of the refrigerant, and only a small amount of refrigerant flows to the gas storage tank 2. The liquid refrigerant is evaporated in the evaporator 5 to form gaseous refrigerant and then flows back to the compressor 1. When the main control board receives a shutdown instruction, the control valve 21 is closed after the rotating speed of the compressor 1 is reduced to 0 and after a first preset time, so that the refrigerant in the gas storage tank 2 can be kept in the gas storage tank 2 and will not migrate, so as to ensure that the compressor 1 can be started quickly next time.

[0047] The technical scheme of the present application has been described in combination with the preferred embodiments shown in the drawings, but it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical schemes after the changes or replacements will all fall within the protection scope of the present application.

Claims

1. An air conditioning system, characterized by, The air conditioning system comprises a compressor (1), a gas tank (2) and a control valve (21), the compressor (1) is provided with a gas supplement port, an exhaust port of the gas tank (2) is connected to the gas supplement port through a first pipeline (61), the control valve (21) is arranged on the first pipeline (61), and the control valve (21) is closed after a first preset time length when the compressor (1) is shut down.

2. The air conditioning system of claim 1, wherein, The air conditioning system further comprises a first one-way valve (22) arranged on the first pipeline (61), and the first one-way valve (22) is configured to allow refrigerant to flow from the gas tank (2) to the compressor (1) only.

3. The air conditioning system of claim 1, wherein, The air conditioning system further comprises a condenser (3), a first side of the condenser (3) is communicated with an air inlet side of the gas tank (2) through a second pipeline (62), a second one-way valve (23) is arranged on the second pipeline (62), and the second one-way valve (23) is configured to allow refrigerant to flow from the condenser (3) to the gas tank (2) only.

4. The air conditioning system of claim 3, wherein, The air conditioning system further comprises a delivery pump (24) arranged on the second pipeline (62), and the delivery pump (24) is used to deliver refrigerant of the condenser (3) to the gas tank (2).

5. The air conditioning system of claim 4, wherein, The delivery pump (24) is a gear pump.

6. The air conditioning system of claim 4, wherein, The air conditioning system further comprises a filter (25) arranged on the second pipeline (62) and located upstream of the delivery pump (24).

7. The air conditioning system of claim 1, wherein, The control valve (21) is an electromagnetic valve or an electric ball valve.

8. The air conditioning system of claim 1, wherein, The gas tank (2) is provided with a pressure detection member for detecting the pressure in the gas tank (2).

9. The air conditioning system of claim 1, wherein, The gas tank (2) is provided with a heater for heating the refrigerant in the gas tank (2).

10. The air conditioning system of any one of claims 3-6, wherein, The air conditioning system further comprises an evaporator (5), a first side of the condenser (3) is communicated with a first side of the evaporator (5) through a third pipeline (64), and a throttling device is arranged on the third pipeline (64).

Images