Gas separation unit, air conditioner and control method of air conditioner

Abstract

The invention provides a gas separation unit, an air conditioner and a control method thereof, the gas separation unit comprises a gas storage container, a pressure release valve and a filter device, mixed gas before separation enters the gas separation unit through the filter device, the gas storage container is used for temporarily storing separated target gas, the gas storage container is provided with a first outlet, and the first outlet is communicated with the pressure release valve. And the first outlet is connected to the filtering device through a pressure release valve. According to the gas separation unit, when the gas separation unit is applied to the air conditioner and is used for separating oxygen in air and the separated oxygen is temporarily stored in the gas storage container, under the condition that the air pressure in the gas storage container is too large and a certain risk exists, the pressure release valve can be controlled to be opened, so that the pressure of the gas storage container is released, and the risk caused by the too large air pressure is eliminated. In the pressure relief process, discharged gas can impact the filtering device in the direction opposite to the gas inlet direction of the filtering device, so that the filtering device can be automatically cleaned, the filtering device does not need to be manually disassembled for cleaning, and the pressure relief device is very convenient to use.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioning, and in particular relates to a gas separation unit, an air conditioner and a control method thereof. Background Art

[0002] Air conditioners with oxygen production function have certain health care effects for special groups. Compared with conventional air conditioners and fresh air air conditioners, they can quickly achieve high-precision oxygen concentration control. The oxygen-producing air conditioner is equipped with a gas separation unit, which can separate the oxygen in the air and temporarily store it in an oxygen storage tank, and then release the oxygen into the room in a timely manner through a flow valve connected to the oxygen storage tank, thereby realizing the oxygen-producing function of the air conditioner. Since the oxygen storage tank needs to store oxygen, its internal air pressure is relatively high, so there are certain potential risks. However, the gas separator of the oxygen-producing air conditioner in the prior art has not taken corresponding measures to deal with this potential risk. At the same time, the filter device of the gas separation unit has a certain degree of dirt and blockage after filtering the air before separation for a long time, and needs to be manually disassembled for cleaning, which is very troublesome. Summary of the invention

[0003] Therefore, the present invention provides a gas separation unit, which can solve the technical problems that the gas separation unit of the existing oxygen-generating air conditioner does not take corresponding measures to deal with the potential risk of high pressure in the oxygen storage tank, and the filter device of the gas separation unit becomes dirty and clogged after filtering the air for a long time, and needs to be manually disassembled for cleaning, which is troublesome.

[0004] In order to solve the above problems, the present invention provides a gas separation unit, including: a gas storage container, a pressure relief valve and a filtering device. The mixed gas before separation enters the gas separation unit through the filtering device. The gas storage container is used to temporarily store the separated target gas. The gas storage container has a first outlet, and the first outlet is connected to the filtering device through the pressure relief valve.

[0005] In some embodiments, the gas separation unit also includes a gas separation device and a three-way valve, the gas separation device is used to separate the target gas from the mixed gas, the three-way valve has a first valve port, a second valve port and a third valve port, the gas storage container also has an inlet and a second outlet, the gas separation unit has an exhaust port, the first valve port is connected to the filter device through the gas separation device, the second valve port is connected to the exhaust port, the third valve port is connected to the inlet, and the second outlet is connected to the exhaust port.

[0006] In some embodiments, a first one-way valve is provided on the flow path between the third valve port and the inlet, and the first one-way valve is used to conduct the flow from the third valve port to the inlet; and / or, a second one-way valve is provided on the flow path between the second outlet and the exhaust port, and the second one-way valve is used to conduct the flow from the second outlet to the exhaust port.

[0007] The present invention also provides an air conditioner, comprising the aforementioned gas separation unit, the air conditioner further comprising an indoor unit and an outdoor unit, the gas separation unit is located in the outdoor unit, and the exhaust port is connected to the air outlet of the indoor unit.

[0008] The present invention also provides a control method for an air conditioner, which is used to control the operation of the aforementioned air conditioner, and the control method comprises:

[0009] Obtaining the air pressure P in the air storage container;

[0010] The opening and closing of the pressure relief valve is controlled according to the magnitude relationship between P and P1, wherein P1 is a first preset air pressure value.

[0011] In some implementations, when P>P1, the pressure relief valve is controlled to open.

[0012] In some embodiments, when P>P1 and the air conditioner includes a second one-way valve, if the second one-way valve fails, the pressure relief valve is controlled to open, and the first valve port and the third valve port of the three-way valve are controlled to be disconnected.

[0013] In some implementations, when P≤P1, the pressure relief valve is controlled to be closed.

[0014] In some embodiments, when P<P0, and the air conditioner includes a three-way valve, the first valve port of the three-way valve is controlled to communicate with the third valve port, wherein P0 is a second preset air pressure value, and P0<P1.

[0015] In some embodiments, when P<P0, and the air conditioner includes a three-way valve and a first one-way valve, if the first one-way valve fails, the first valve port of the three-way valve is controlled to be disconnected from the third valve port, wherein P0 is the second preset air pressure value, and P0<P1.

[0016] The present invention provides a gas separation unit, an air conditioner and a control method thereof, which have the following beneficial effects:

[0017] When the gas separation unit of the present application is applied to an air conditioner and used to separate oxygen from the air, and the separated oxygen is temporarily stored in a gas storage container, since the gas storage container is connected to the filter device through a pressure relief valve, when there is a certain risk of excessive air pressure in the gas storage container, the pressure relief valve can be controlled to open to release the pressure in the gas storage container, thereby eliminating the risk caused by excessive air pressure. During the pressure relief process, the discharged gas will impact the filter device in the opposite direction of the air intake of the filter device, thereby blowing out the dirt on the filter device and realizing automatic cleaning of the filter device, so that there is no need to manually disassemble the filter device for cleaning, which is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0019] Figure 1 A schematic diagram of a gas separation unit according to an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of gas flow when the gas separation unit according to an embodiment of the present invention is depressurized;

[0021] Figure 3 A schematic diagram of gas flow when the gas separation unit according to an embodiment of the present invention performs conventional oxygen supply;

[0022] Figure 4 A schematic diagram of gas flow when the gas separation unit according to an embodiment of the present invention stores oxygen;

[0023] Figure 5 A schematic diagram of gas flow when a gas separation unit according to an embodiment of the present invention utilizes oxygen storage to supply oxygen;

[0024] Figure 6 4 is a control flow chart of an air conditioner according to an embodiment of the present invention.

[0025] The reference numerals are:

[0026] 1. Gas storage container; 2. Pressure relief valve; 3. Filter device; 4. First valve port; 5. Second valve port; 6. Third valve port; 7. Exhaust port; 8. Buffer oxygen storage device; 9. First one-way valve; 10. Second one-way valve; 11. Flow control valve; 12. Dehumidification device; 13. Air compressor; 14. Muffler; 15. Molecular sieve four-way valve; 16. Nitrogen exhaust port; 17. First molecular sieve; 18. Second molecular sieve; 19. Third one-way valve; 20. Temperature sensing package. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0029] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0030] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0031] See also Figures 1 to 6As shown, according to an embodiment of the present invention, a gas separation unit is provided, including: a gas storage container 1, a pressure relief valve 2 and a filtering device 3. The mixed gas before separation enters the gas separation unit through the filtering device 3. The gas storage container 1 is used to temporarily store the separated target gas. The gas storage container 1 has a first outlet, and the first outlet is connected to the filtering device 3 through the pressure relief valve 2.

[0032] In this technical solution, when the gas separation unit of the present application is applied to an air conditioner and used to separate oxygen from the air, and the separated oxygen is temporarily stored in a gas storage container 1, since the gas storage container 1 is connected to the filter device 3 through a pressure relief valve 2, when there is a certain risk of excessive air pressure in the gas storage container 1, the pressure relief valve 2 can be controlled to open, so that the gas storage container 1 is depressurized, thereby eliminating the risk caused by excessive air pressure. During the depressurization process, the discharged gas will impact the filter device 3 in the opposite direction of the air intake of the filter device 3, thereby blowing out the dirt and blockage on the filter device 3, and realizing automatic cleaning of the filter device 3, so that there is no need to manually disassemble the filter device 3 for cleaning, which is very convenient. Among them, when the gas separation unit is applied to the air conditioner for oxygen separation, the mixed gas before separation refers to air, and the separated target gas refers to oxygen. It can be understood that the gas separation unit of the present application can also be applied to other equipment other than air conditioners for oxygen separation or other gas separation.

[0033] See also Figure 1 As shown, the gas separation unit also includes a gas separation device and a three-way valve. The gas separation device is used to separate the target gas from the mixed gas. The three-way valve has a first valve port 4, a second valve port 5 and a third valve port 6. The gas storage container 1 also has an inlet and a second outlet. The gas separation unit has an exhaust port 7. The first valve port 4 is connected to the filter device 3 through the gas separation device, the second valve port 5 is connected to the exhaust port 7, the third valve port 6 is connected to the inlet, and the second outlet is connected to the exhaust port 7.

[0034] In this embodiment, when the first valve port 4 and the second valve port 5 of the three-way valve are connected, and the exhaust port 7 of the gas separation unit is connected to the room, the gas separation unit can be used for conventional oxygen supply, specifically, the oxygen separated by the gas separation device flows directly to the exhaust port 7 through the guidance of the three-way valve, and then discharged from the exhaust port 7 into the room for oxygen supply. Conventional oxygen supply is actually oxygen separated and supplied to the room. When the first valve port 4 and the third valve port 6 of the three-way valve are connected, and the exhaust port 7 of the gas separation unit is connected to the room, the gas separation unit can be used for oxygen storage, specifically, the oxygen separated by the gas separation device is temporarily stored in the gas storage container 1 after passing through the guidance of the three-way valve. Oxygen is not directly supplied to the room, but temporarily stored and supplied to the room through the gas storage container 1 at night, so that the gas separation unit can be used to supply oxygen to the room in a non-working state, thereby avoiding the noise of the unit affecting the rest of users and neighbors. That is, by setting a three-way valve to selectively connect the exhaust port 7 and the gas storage container 1, it is possible to separate oxygen and supply it to the room during the day through the operation of the unit, and supply oxygen to the room through the gas storage container 1 at night, so that the unit is in a non-operating state to avoid noise. In order to ensure that the gas storage container 1 stores enough oxygen to meet the normal oxygen consumption of the human body for at least four hours at night, it is necessary to detect the oxygen content in the gas storage container 1 at the end of the normal oxygen supply during the day to ensure that the oxygen content in the gas storage container 1 is not less than 80% of the maximum capacity of the gas storage container 1.

[0035] It should be noted that the gas separation device includes a molecular sieve four-way valve 15, a first molecular sieve 17 and a second molecular sieve 18. The gas separation device also has a nitrogen outlet 16. A dehumidifier 12, an air compressor 13 and a muffler 14 are sequentially arranged between the filter device 3 and the gas separation device. A temperature sensing package 20 is arranged on one side of the air compressor 13. The temperature sensing package 20 is used to detect the temperature of the air compressor 13 in real time when it is in working state. The gas flow before the three-way valve is as follows: the air enters from the filter device 3, then passes through the dehumidifier 12 for dehumidification, enters the air compressor 13 for compression after dehumidification, and the compressed air flows through the muffler 14 for silencing, and then enters the molecular sieve four-way valve 15. At this time, the molecular sieve four-way valve 15 can be controlled to connect the first molecular sieve 17 with the muffler 14, and the second molecular sieve 18 with the nitrogen outlet 16. Then the first molecular sieve 17 adsorbs nitrogen in the air. After the first molecular sieve 17 is saturated with adsorption, the molecular sieve four-way valve 15 is controlled to connect the second molecular sieve 18 with the muffler 14, and the first molecular sieve 17 is connected with the nitrogen outlet 16. Then the nitrogen adsorbed by the first molecular sieve 17 is discharged through the nitrogen outlet 16, and the second molecular sieve 18 continues to adsorb nitrogen in the air. After the second molecular sieve 18 is saturated with adsorption, it is switched again, and this is repeated. It can be understood that when the unit is supplying oxygen conventionally, the air compressor 13 needs to be started and the gas separation device needs to work; when the unit is storing oxygen, the air compressor 13 needs to be started and the gas separation device needs to work; when the unit uses oxygen storage to supply oxygen, the air compressor 13 does not start and the gas separation device does not work.

[0036] See also Figure 1 As shown, a first one-way valve 9 is provided on the flow path between the third valve port 6 and the inlet, and the first one-way valve 9 is used to conduct the flow from the third valve port 6 to the inlet. By providing the first one-way valve 9, it is possible to prevent oxygen from flowing back when the first valve port 4 and the third valve port 6 of the three-way valve are connected to store oxygen in the gas storage container 1.

[0037] See also Figure 1 As shown, a second one-way valve 10 is provided on the flow path between the second outlet and the exhaust port 7, and the second one-way valve 10 is used to conduct the flow from the second outlet to the exhaust port 7. By providing the second one-way valve 10, it is possible to prevent oxygen from flowing back when the gas storage container 1 supplies oxygen to the room.

[0038] See also Figure 1As shown, a third one-way valve 19 and a buffer oxygen storage device 8 are sequentially arranged on the path between the second valve port 5 and the exhaust port 7 of the three-way valve. By arranging the third one-way valve 19, it is possible to prevent oxygen from flowing back when the first valve port 4 and the second valve port 5 of the three-way valve are connected to instantly store oxygen into the room. By arranging the buffer oxygen storage device 8 between the third one-way valve 19 and the exhaust port 7, a buffer can be formed for the oxygen, the flow rate of the oxygen can be slowed down, and a large impact of oxygen flowing into the room can be prevented. Among them, the buffer oxygen storage device 8 can be a cylinder with a larger inner diameter. When the oxygen enters the cylinder, the flow rate slows down due to the large space.

[0039] It should also be noted that a flow control valve 11 is provided on the path between the buffer oxygen storage 8 and the exhaust port 7, and the gas storage container 1 is connected between the flow control valve 11 and the buffer oxygen storage 8 via a second one-way valve 10. The flow control valve 11 can adjust the amount of oxygen entering the room per unit time during conventional oxygen supply and oxygen supply using oxygen storage to meet user needs. The gas flow direction of the complete gas separation unit during pressure relief, conventional oxygen supply, oxygen storage, and oxygen supply using oxygen storage can be seen in Figures 2 to 5 shown.

[0040] The present invention also provides an air conditioner, comprising the aforementioned gas separation unit, the air conditioner further comprising an indoor unit and an outdoor unit, the gas separation unit being located in the outdoor unit, thus avoiding noise problems during the operation of the unit. The exhaust port of the gas separation unit is connected to the air outlet of the indoor unit, so that the oxygen supplied into the room can be discharged into the room through the air outlet of the indoor unit.

[0041] The present invention also provides a control method for controlling the operation of the aforementioned air conditioner, the control method comprising:

[0042] Obtaining the air pressure P in the air storage container 1;

[0043] The opening and closing of the pressure relief valve 2 is controlled according to the magnitude relationship between P and P1, wherein P1 is a first preset air pressure value.

[0044] In this technical solution, the first preset pressure value P1 is the storage pressure safety threshold of the gas storage container 1, which is approximately the maximum storage pressure P of the gas storage container 1. m By comparing the air pressure P in the gas storage container 1 with the storage pressure safety threshold P1, it is possible to know whether the current air pressure in the gas storage container 1 is too high and whether there is a safety hazard, so as to decide whether it is necessary to control the pressure relief valve 2 to open.

[0045] As a specific implementation, when P>P1, it indicates that the current air pressure in the gas storage container 1 is above the safety threshold and there is a potential safety hazard. Then the outdoor unit is powered, the indoor unit displays the fault code of the pressure relief valve 2, and the pressure relief valve 2 is controlled to open. The gas storage container 1 can also automatically clean the filter device 3 while releasing the pressure. Preferably, the pressure relief valve 2 is equipped with a physical switch. When the pressure value in the gas storage container 1 exceeds its physical switch threshold, that is, the air pressure in the gas storage container 1 is greater than the maximum storage pressure P m When the pressure in the gas storage container 1 exceeds the maximum storage pressure P, the pressure relief valve 2 is opened to release the pressure. More preferably, the pressure relief valve 2 is equipped with a large capacitor. When the pressure value in the gas storage container 1 does not exceed its physical switch threshold, the stored electricity in the large capacitor is enough to activate the pressure relief valve 2 once for other quick release. m If the pressure relief valve 2 does not open, it means that the physical switch of the pressure relief valve 2 fails. At this time, the outdoor unit is not powered, the air conditioner cannot be started, and the indoor unit mainboard is powered, giving a signal to the outdoor unit mainboard, using a large capacitor to drive the pressure relief valve 2 to passively open and release pressure. If the pressure relief valve 2 cannot be opened, it means that the pressure relief valve 2 has failed, the pressure in the gas storage container 1 is too high, and the air conditioner cannot be started due to risks, and needs to be reported for manual processing. If the pressure relief valve 2 can be opened, it means that the pressure relief valve 2 is fine, until the pressure in the gas storage container 1 drops below the storage pressure safety threshold, the indoor unit pressure relief valve 2 fault code is cancelled, and the air conditioner is started and used normally.

[0046] Furthermore, if P>P1, the indoor unit displays not only the fault code of the pressure relief valve 2, but also the fault code of the second one-way valve 10, indicating that the air pressure in the gas storage container 1 is above the safety threshold because the second one-way valve 10 fails, and the oxygen output of the gas storage container 1 is blocked. At this time, it is necessary not only to control the pressure relief valve 2 to open and release the pressure, but also to control the first valve port 4 and the third valve port 6 of the three-way valve to disconnect the connection, so as to ensure that the oxygen separated by the gas separation device is not temporarily stored in the gas storage container 1. The fault problem of the second one-way valve 10 needs to be reported for manual processing.

[0047] As a specific implementation, when P≤P1, it indicates that the gas pressure in the current gas storage container 1 is below the safety threshold and there is no potential safety hazard, so the pressure relief valve 2 is controlled to be closed.

[0048] Further, when P<P0, and the air conditioner includes a three-way valve, the first valve port 4 and the third valve port 6 of the three-way valve are controlled to communicate with each other, wherein P0 is the second preset air pressure value, and P0<P1.

[0049] In this embodiment, the second preset pressure value P0 is the lowest threshold value of the storage pressure of the gas storage container 1, which is approximately the maximum storage pressure P of the gas storage container 1. m20% to 30% of the total oxygen consumption. When P<P0, it indicates that the air pressure in the gas storage container 1 is relatively low, indicating that the gas storage container 1 was not replenished after the oxygen was supplied last time. The air conditioner is turned on and used normally. According to the user's usage, the first valve port 4 and the third valve port 6 of the three-way valve are controlled to be connected during idle time, the air compressor 13 is controlled to start, and the gas separation device is controlled to work, so that the separated oxygen is stored in the gas storage container 1. When the pressure in the gas storage container 1 reaches P1, the first valve port 4 and the third valve port 6 of the three-way valve are controlled to be disconnected, the air compressor 13 is controlled to stop, and the gas separation device is controlled to stop working. It can be understood that when the air pressure in the gas storage container 1 is between the second preset air pressure value P0 and the first preset air pressure value P1, it is the normal pressure of the gas storage container 1, and the air conditioner is used normally.

[0050] Furthermore, if P<P0, the indoor unit displays the fault code of the first check valve 9, indicating that the gas pressure in the gas storage container 1 is less than the minimum threshold value due to the failure of the first check valve 9, and the oxygen storage in the gas storage container 1 is blocked. At this time, it is necessary to control the first valve port 4 and the third valve port 6 of the three-way valve to disconnect the connection, because the oxygen separated by the gas separation device can no longer be stored in the gas storage container 1. The failure of the first check valve 9 needs to be reported for manual processing.

[0051] Figure 6 The control flow chart of the air conditioner of the present application is shown in FIG. Figure 6In the control flow, the oxygen storage device is the gas storage container 1, the oxygen quick release valve is the pressure relief valve 2, the oxygen production module is the gas separation device, the one-way valve 1 is the first one-way valve, the one-way valve 2 is the second one-way valve, and the three-way valve 2 is prohibited from opening, that is, the first valve port 4 and the third valve port 6 of the three-way valve are disconnected. The specific control process is: the air conditioner is powered on, the air pressure in the oxygen storage device is obtained, and the air pressure is determined. If the air pressure in the oxygen storage device is greater than or equal to P0 and less than or equal to P1, it means that the pressure is normal and the air conditioner is turned on and used normally. If the air pressure in the oxygen storage device is less than P0 or greater than P1, it means that the pressure in the oxygen storage device is abnormal, and it is necessary to check whether each valve body has a fault. If the one-way valve 2 fails, it means that the air pressure in the oxygen storage device is greater than P1 because the oxygen outlet of the oxygen storage device is blocked, then the three-way valve 2 needs to be prohibited from opening to ensure that oxygen is not stored in the deaerator, and at the same time, the oxygen quick release valve is started to release the pressure. If one-way valve 1 fails, it means that the air pressure in the oxygen reservoir is less than P0, which is caused by the oxygen storage in the oxygen reservoir being blocked. In this case, three-way valve 2 must be opened and prohibited because oxygen can no longer be stored in the oxygen reservoir. The indoor unit displays the one-way valve 1 fault code. If all one-way valves are not faulty, when the air pressure in the oxygen reservoir is greater than P1, the oxygen quick release valve is started to release the pressure. After the air pressure in the oxygen reservoir drops to the normal range, the air conditioner is started and used normally. If all one-way valves are not faulty, when the air pressure in the oxygen reservoir is less than P0, it means that the oxygen has not been replenished after the last consumption. The air conditioner is started and used normally. The oxygen production module is started to store oxygen in the oxygen reservoir. When the pressure in the oxygen reservoir reaches P1, the oxygen production module is turned off. If all one-way valves are not faulty and the air pressure in the oxygen reservoir is greater than P m It indicates that the oxygen quick release valve cannot be opened, and the indoor unit displays the oxygen quick release valve fault code. Then the outdoor unit is not powered and the air conditioner cannot be started. Maintenance manual processing is required to start the oxygen quick release valve to release pressure.

[0052] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0053] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A gas separation unit, It is characterized in that The invention comprises a gas storage container (1), a pressure relief valve (2) and a filtering device (3); the mixed gas before separation enters the gas separation unit through the filtering device (3); the gas storage container (1) is used for temporarily storing the separated target gas; the gas storage container (1) has a first outlet, and the first outlet is connected to the filtering device (3) through the pressure relief valve (2).

2. The gas separation unit according to claim 1, It is characterized in that It also comprises a gas separation device and a three-way valve, wherein the gas separation device is used to separate the target gas from the mixed gas, the three-way valve has a first valve port (4), a second valve port (5) and a third valve port (6), the gas storage container (1) also has an inlet and a second outlet, the gas separation unit has an exhaust port (7), the first valve port (4) is connected to the filter device (3) through the gas separation device, the second valve port (5) is connected to the exhaust port (7), the third valve port (6) is connected to the inlet, and the second outlet is connected to the exhaust port (7).

3. The gas separation unit according to claim 2, It is characterized in that A first one-way valve (9) is provided on the flow path between the third valve port (6) and the inlet, and the first one-way valve (9) is used to conduct the flow from the third valve port (6) to the inlet; and / or a second one-way valve (10) is provided on the flow path between the second outlet and the exhaust port (7), and the second one-way valve (10) is used to conduct the flow from the second outlet to the exhaust port (7).

4. An air conditioner, It is characterized in that The air conditioner comprises the gas separation unit according to any one of claims 1 to 3, and further comprises an indoor unit and an outdoor unit, wherein the gas separation unit is located in the outdoor unit, and the exhaust port (7) is connected to the air outlet of the indoor unit.

5. A method for controlling an air conditioner, It is characterized in that For controlling the operation of the air conditioner according to claim 4, the control method comprises: Obtaining the air pressure P in the air storage container (1); According to P and P 1 The size relationship between P and V is used to control the opening and closing of the pressure relief valve (2), wherein the P 1 It is the first preset air pressure value.

6. The control method according to claim 5, It is characterized in that When P>P 1 When the pressure relief valve (2) is controlled to open.

7. The control method according to claim 5, It is characterized in that When P>P 1 , and when the air conditioner includes a second one-way valve (10), if the second one-way valve (10) fails, the pressure relief valve (2) is controlled to open, and the first valve port (4) and the third valve port (6) of the three-way valve are controlled to be disconnected.

8. The control method according to claim 5, It is characterized in that When P≤P 1 When the pressure relief valve (2) is controlled to close.

9. The control method according to claim 8, It is characterized in that When P<P 0 , and when the air conditioner includes a three-way valve, the first valve port (4) of the three-way valve is controlled to communicate with the third valve port (6), wherein P 0 is the second preset pressure value, P 0 <P 1 .

10. The control method according to claim 8, It is characterized in that When P<P 0 , and the air conditioner comprises a three-way valve and a first one-way valve (9), if the first one-way valve (9) fails, the first valve port (4) of the three-way valve is controlled to be disconnected from the third valve port (6), wherein P 0 is the second preset pressure value, P 0 <P 1 .

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