Switching device, refrigerant cut-off system and air conditioning system

Abstract

The utility model provides a switching device, a refrigerant cut-off system and an air conditioning system, and the switching device comprises a main power supply assembly which is provided with a main power supply, and the main power supply is used for supplying power to a refrigerant leakage cut-off ball valve; the stand-by power supply assembly is provided with a stand-by power supply, and the stand-by power supply is used for supplying power to the refrigerant leakage stop ball valve; the on-off assembly is electrically connected with the main power supply assembly; when the main power supply assembly supplies power to the on-off assembly, the main power supply supplies power to the refrigerant leakage cut-off ball valve, and when the main power supply assembly does not supply power to the on-off assembly, the standby power supply supplies power to the refrigerant leakage cut-off ball valve. The switching device solves the technical problem that a power supply circuit of the refrigerant leakage stop ball valve is unstable in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigerant leakage, and particularly relates to a switching device, a refrigerant cut-off system and an air-conditioning system. Background Art

[0002] In modern air-conditioning systems, refrigerants are an important component. With the accelerating pace of global governance of the greenhouse effect, environmentally friendly refrigerants such as R32 and R290 have gradually been applied in mainstream air-conditioning products. However, environmentally friendly refrigerants such as R32 and R290 are slightly flammable. When they work in a high-temperature and high-pressure environment, once leakage occurs, it may cause serious consequences. In actual system operation, when refrigerant leakage occurs, it can be closed by a refrigerant leakage cut-off ball valve to avoid more serious subsequent consequences. Therefore, how to ensure the normal operation of the refrigerant leakage cut-off ball valve in the system and stable power supply becomes the key.

[0003] Traditional main-backup power supply backup is achieved through the switching of strong-current AC contactors or relays. When the AC contactor or strong-current relay is switching, due to the on-off of the contacts, problems such as arcing at the disconnected contacts and rapid changes in load current are likely to occur, which will cause signal interference and current disturbance to the backend load. Since R32 refrigerant is a slightly flammable refrigerant, the arcing of the contact current of the contactor and current disturbance are likely to cause safety and reliability problems and cannot be applied to the control circuit of the refrigerant leakage cut-off ball valve.

[0004] Therefore, the existing technology needs to be further developed. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the above technical deficiencies and provide a switching device, a refrigerant cut-off system and an air-conditioning system to solve the technical problem of unstable power supply circuit of the refrigerant leakage cut-off ball valve in the related technology.

[0006] To achieve the above technical purpose, the utility model adopts the following technical solutions: A switching device is provided for supplying power to a refrigerant leakage cut-off ball valve, including: a main power supply component, the main power supply component has a main power supply, and the main power supply is used to supply power to the refrigerant leakage cut-off ball valve; a backup power supply component, the backup power supply component has a backup power supply, and the backup power supply is used to supply power to the refrigerant leakage cut-off ball valve; a switching component, the switching component is electrically connected to the main power supply component; when the main power supply component supplies power to the switching component, the main power supply supplies power to the refrigerant leakage cut-off ball valve, and when the main power supply component does not supply power to the switching component, the backup power supply supplies power to the refrigerant leakage cut-off ball valve.

[0007] Furthermore, the main power supply assembly has an active circuit which is used to connect the main power supply to the refrigerant leakage cut-off ball valve so that the leakage cut-off ball valve can cut off or open the flow path, and the refrigerant leakage cut-off ball valve is selectively connected to the main power supply; the backup power supply assembly has a backup circuit which is used to connect the backup power supply to the refrigerant leakage cut-off ball valve so that the leakage cut-off ball valve can cut off or open the flow path, and the refrigerant leakage cut-off ball valve is selectively connected to the backup power supply.

[0008] Furthermore, a first pin and a second pin are provided on the active circuit, and both the first pin and the second pin are connected to the main power supply; a third pin and a fourth pin are provided on the backup circuit, and both the third pin and the fourth pin are connected to the backup power supply; the on-off assembly includes a first switch and a second switch, the first switch is selectively connected to the first pin and the third pin, and the second switch is selectively connected to the second pin and the fourth pin.

[0009] Furthermore, the first switch is a single-pole double-throw switch; and / or, the second switch is a single-pole double-throw switch.

[0010] Furthermore, the switching device further includes an on-off circuit which is used to connect the main power supply and the on-off assembly, and the on-off circuit is used to control the positions of the first switch and the second switch.

[0011] Furthermore, when the main power supply supplies power to the on-off circuit, the first switch is connected to the first pin and the second switch is connected to the second pin; when the main power supply does not supply power to the on-off circuit, the first switch is connected to the third pin and the second switch is connected to the fourth pin.

[0012] Furthermore, both the main power supply and the backup power supply are AC-DC power supplies.

[0013] A refrigerant cut-off system includes: a switching device; a refrigerant leakage cut-off ball valve which is used to prevent refrigerant leakage; a control module which is signal-connected to the refrigerant leakage cut-off ball valve and is used to control the on-off of the refrigerant leakage cut-off ball valve.

[0014] Furthermore, the control module has a detection component which is used to detect the refrigerant concentration in the environment.

[0015] An air-conditioning system includes a switching device.

[0016] Beneficial effects:

[0017] 1. The switching device of the present utility model improves the reliability of the air-conditioning system. By adopting AC-DC power conversion to convert strong electricity into weak electricity, and then using weak electricity to control the relay to switch the power backup, the contact current arcing during the switching process is reduced, ensuring that the cut-off ball valve can be safely and stably closed in the environment of air-conditioning refrigerant leakage, and improving the system reliability.

[0018] 2. The switching device of the present utility model improves the safety of the air-conditioning system. By ensuring the normal operation of the refrigerant leakage cut-off ball valve of the air conditioner, the possibility of refrigerant leakage is effectively reduced, thus improving the system safety.

[0019] 3. The switching device of the present utility model improves the stability of the air-conditioning system. By ensuring the normal operation of the cut-off ball valve, it helps to prevent the valve failure caused by power fluctuations or faults, thus improving the overall stability of the air-conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the switching device adopted in the embodiment of the present utility model;

[0021] Figure 2 is a flowchart of the use of the backup power supply switching device adopted in the embodiment of the present utility model;

[0022] Figure 3 is a schematic structural diagram of the on-off component of the switching device structure adopted in Embodiment 1 of the present utility model.

[0023] Among them, the above-mentioned drawings include the following reference numerals:

[0024] 1. Main power supply component; 11. Main power supply; 12. Active circuit; 13. On-off circuit; 2. Backup power supply component; 21. Backup power supply; 22. Backup circuit; 3. On-off component; 31. First pin; 32. Second pin; 33. Third pin; 34. Fourth pin; 35. First switch; 36. Second switch; 4. Refrigerant leakage cut-off ball valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to enable those skilled in the art to better understand the solution of the present application, 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 a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0026] According to an embodiment of the present utility model, a switching device is provided for supplying power to the refrigerant leakage cut-off ball valve 4. Please refer to Figures 1 to 2, including: a main power supply assembly 1, the main power supply assembly 1 has a main power supply 11, and the main power supply 11 is used to supply power to the refrigerant leakage cut-off ball valve 4; a backup power supply assembly 2, the backup power supply assembly 2 has a backup power supply 21, and the backup power supply 21 is used to supply power to the refrigerant leakage cut-off ball valve 4; a switching assembly 3, the switching assembly 3 is electrically connected to the main power supply assembly 1; when the main power supply assembly 1 supplies power to the switching assembly 3, the main power supply 11 supplies power to the refrigerant leakage cut-off ball valve 4, and when the main power supply assembly 1 does not supply power to the switching assembly 3, the backup power supply 21 supplies power to the refrigerant leakage cut-off ball valve 4.

[0027] With the above settings, a backup power supply assembly 2 is added to the power supply pipeline of the refrigerant leakage cut-off ball valve 4, and a switching assembly 3 is connected to the main power supply 11. When the main power supply 11 cannot supply power to the refrigerant leakage cut-off ball valve 4 normally, the switching assembly 3 controls the refrigerant leakage cut-off ball valve 4 to be connected to the backup power supply 21, ensuring the normal operation of the refrigerant leakage cut-off ball valve 4, effectively reducing the possibility of refrigerant leakage, and solving the technical problem of unstable power supply circuit of the refrigerant leakage cut-off ball valve.

[0028] In the switching device of the present utility model, refer to Figure 1 , the main power supply assembly 1 has an active circuit 12, and the active circuit 12 is used to connect the main power supply 11 and the refrigerant leakage cut-off ball valve 4 so that the refrigerant leakage cut-off ball valve 4 cuts off or opens the flow path, and the refrigerant leakage cut-off ball valve 4 is selectively connected to the main power supply 11; the backup power supply assembly 2 has a backup circuit 22, and the backup circuit 22 is used to connect the backup power supply 21 and the refrigerant leakage cut-off ball valve 4 so that the refrigerant leakage cut-off ball valve 4 cuts off or opens the flow path, and the refrigerant leakage cut-off ball valve 4 is selectively connected to the backup power supply 21. In this way, the active circuit 12 connects the refrigerant leakage cut-off ball valve 4 and the main power supply 11, and the backup circuit 22 connects the refrigerant leakage cut-off ball valve 4 and the backup power supply 21. The refrigerant leakage cut-off ball valve 4 can be selectively electrically connected to the main power supply 11 or the backup power supply 21. When the main power supply 11 cannot supply power normally, the refrigerant leakage cut-off ball valve 4 is connected to the backup power supply 21, improving the stability of the power supply circuit of the refrigerant leakage cut-off ball valve and solving the technical problem of unstable power supply circuit of the refrigerant leakage cut-off ball valve.

[0029] In the switching device of the present utility model, refer to Figure 1, a first pin 31 and a second pin 32 are provided on the active circuit 12, and both the first pin 31 and the second pin 32 are connected to the main power supply 11; a third pin 33 and a fourth pin 34 are provided on the standby circuit 22, and both the third pin 33 and the fourth pin 34 are connected to the standby power supply 21; the on-off component 3 includes a first switch 35 and a second switch 36, and the first switch 35 is selectively connected to the first pin 31 and the third pin 33, and the second switch 36 is selectively connected to the second pin 32 and the fourth pin 34. In this way, when the first switch 35 is connected to the first pin 31 and the second switch 36 is connected to the second pin 32, the active circuit 12 becomes a closed loop, and the main power supply 11 supplies power to the refrigerant leakage cut-off ball valve 4; when the first switch 35 is connected to the third pin 33 and the second switch 36 is connected to the fourth pin 34, the standby circuit 22 becomes a closed loop, and the standby power supply 21 supplies power to the refrigerant leakage cut-off ball valve 4.

[0030] In the switching device of the present utility model, refer to Figure 1 , the first switch 35 is a single-pole double-throw switch; and / or, the second switch 36 is a single-pole double-throw switch. In this way, the first switch 35 can be connected to the first pin 31 or the second pin 32, and the second switch 36 can be connected to the third pin 33 or the fourth pin 34.

[0031] In the switching device of the present utility model, refer to Figure 1 , the switching device further includes a switching circuit 13, and the switching circuit 13 is used to connect the main power supply 11 and the on-off component 3, and the switching circuit 13 is used to control the positions of the first switch 35 and the second switch 36.

[0032] Specifically, in the default state, the first switch 35 is connected to the second pin 32, and the second switch 36 is connected to the fourth pin 34. When the main power supply 11 supplies power to the on-off component 3, the first switch 35 is connected to the first pin 31, and the second switch 36 is connected to the third pin 33.

[0033] In the switching device of the present utility model, refer to Figure 1, when the main power supply 11 supplies power to the on-off circuit 13, the first switch 35 is connected to the first pin 31, and the second switch 36 is connected to the second pin 32; when the main power supply 11 does not supply power to the on-off circuit 13, the first switch 35 is connected to the third pin 33, and the second switch 36 is connected to the fourth pin 34. In this way, the on-off circuit 13 is provided on the main power supply 11. When the main power supply 11 can supply power normally, the main power supply 11 supplies power to the on-off circuit 13 at the same time. The first switch 35 is connected to the first pin 31, and the second switch 36 is connected to the third pin 33. The refrigerant leakage cut-off ball valve 4 is powered by the main power supply 11. When the main power supply 11 cannot supply power normally, the first switch 35 and the second switch 36 return to the default state. The first switch 35 is connected to the second pin 32, and the second switch 36 is connected to the fourth pin 34. The refrigerant leakage cut-off ball valve 4 is powered by the backup power supply 21, ensuring that the refrigerant leakage cut-off ball valve 4 will not stop working due to the power failure of the main power supply 11, and improving the stability of the power supply circuit.

[0034] In the switching device of the present utility model, referring to Figure 1 , both the main power supply 11 and the backup power supply 21 are AC-DC power supplies.

[0035] Specifically, the traditional main-backup power supply backup is realized through the switching of a strong-current AC contactor or relay. When the AC contactor or the strong-current relay is switching, due to the on-off of the contacts, problems such as arc pulling at the disconnected contacts and rapid change of the load current are likely to occur, which will cause signal interference and current disturbance to the backend load. Since the R32 refrigerant belongs to a slightly flammable refrigerant, the arc pulling at the contact current of the contactor and the current disturbance are likely to cause safety and reliability problems and cannot be applied to the control circuit of the refrigerant current cut-off ball valve. In this embodiment, after converting the strong current into weak current by using an AC-DC power supply, the weak current is backed up and switched to reduce interference and improve the safety and reliability of the power supply circuit of the refrigerant leakage cut-off ball valve 4.

[0036] Referring to Figure 2 , the usage process of the switching device in this embodiment includes:

[0037] The system is powered on and runs. The AC-DC power supply converts the strong current into weak current. The on-off component 3 judges whether the main power supply 11 loses power. If not, the main power supply 11 supplies power normally and the system runs normally; if so, the system automatically switches to the backup power supply 21 to supply power to the refrigerant leakage cut-off ball valve 4;

[0038] The on-off component 3 judges whether the main power supply 11 is restored. If not, the backup power supply 21 continues to supply power. If so, the system automatically switches to the main power supply 11 to supply power to the refrigerant leakage cut-off ball valve 4.

[0039] This embodiment provides a refrigerant cut-off system, including: a switching device; a refrigerant leakage cut-off ball valve 4 for preventing refrigerant leakage; and a control module, which is signal-connected to the refrigerant leakage cut-off ball valve 4 and used to control the on-off of the refrigerant leakage cut-off ball valve 4. In this way, the refrigerant leakage cut-off ball valve 4 has a stable power supply circuit. When the control module receives a signal and needs the refrigerant leakage cut-off ball valve 4 to cut off the refrigerant flow path, the refrigerant leakage cut-off ball valve 4 can promptly close the refrigerant flow path to prevent refrigerant leakage and improve the safety of the refrigerant system.

[0040] In the refrigerant cut-off system of this embodiment, the control module has a detection component for detecting the refrigerant concentration in the environment. In this way, the detection component detects the refrigerant concentration in the environment in real time and transmits the detection result to the control module. After receiving the detection result, the control module compares it with the standard refrigerant content. If the refrigerant concentration in the environment is higher than the standard content, it controls the refrigerant flow path of the refrigerant leakage cut-off ball valve 4 to prevent refrigerant leakage and improve the safety of the refrigerant system.

[0041] This embodiment provides an air-conditioning system including the above-mentioned switching device.

[0042] Specifically, the on-off component 3 automatically switches the main power supply 11 and the standby power supply 21 to supply power to the refrigerant leakage cut-off ball valve 4 to achieve power backup, thereby providing a stable power supply for the refrigerant leakage cut-off ball valve 4 to enable it to work properly, and further improving the safety of the air-conditioning system.

[0043] Embodiment 1:

[0044] See Figure 1 、 Figure 3 In this embodiment, the switching device is divided into five parts: an AC-DC power supply 1 (main power supply 11), an AC-DC power supply 2 (standby power supply 21), an on-off component 3, a refrigerant leakage cut-off ball valve 4, and a control module.

[0045] Among them, the main power supply 11 provides three-way power supply externally, namely: VDD, M_DC1, and M_DC2. Among them, VDD is used to control the suction directions of the first switch 35 and the second switch 36 in the on-off component 3, and the other two paths M_DC1 and M_DC2 are respectively used to supply power to the refrigerant leakage cut-off ball valve 4 and the control module;

[0046] The backup power supply 22 provides two power supplies externally, namely: B_DC1 and B_DC2. These two power supplies serve as backup power supplies for M_DC1 and M_DC2 of the main power supply. Under normal circumstances, the backup power supply 22 will not be connected to the refrigerant leakage cut-off ball valve 4. When the main power supply 11 loses power, the on-off component 3 will immediately and automatically switch to the backup power supply 22 to supply power to the refrigerant leakage cut-off ball valve 4, ensuring that the refrigerant leakage cut-off ball valve will not stop working due to the power failure of the main power supply.

[0047] The on-off component 3 controls the switching between the main power supply 11 and the backup power supply 21. The inside of the on-off component 3 is similar to two groups of single-pole double-throw switches. The first pin 31, the third pin 33, and the first switch 35 form one group, and the second pin 32, the fourth pin 34, and the second switch 36 form one group. By default, the first switch 35 is conducting with the third pin 33, and the second switch 36 is conducting with the fourth pin 34. When the pin of the on-off component 3 is supplied with VDD power, the first switch 35 will turn to conduct with the first pin 31, and the second switch 36 will turn to conduct with the second pin 32. Specifically, the default state is that the main power supply is not powered on.

[0048] The refrigerant leakage cut-off ball valve 4 is used to close the refrigerant outlet when refrigerant leakage occurs, thereby blocking the continuous leakage of refrigerant.

[0049] The control module is the system control center that controls the operation of the entire system. When refrigerant leakage occurs, it controls the refrigerant leakage cut-off ball valve 4 to close to block further leakage of refrigerant.

[0050] During the use of the switching device, when the system is powered on and running, the VDD in the main power supply supplies power to the on-off component 3, causing the first switch 35, the first pin 31 and the second switch 36, the second pin 32 to conduct respectively. At this time, both the refrigerant leakage cut-off ball valve 4 and the control module are powered by the main power supply and work normally.

[0051] When the main power supply loses power, due to the power failure of the on-off component 3, the pins will return to the default position. At this time, the backup power supply 22 is connected to ensure normal power supply to the refrigerant leakage cut-off ball valve 4, and it can be timely shut off when leakage occurs.

[0052] When the main power supply resumes power supply, the on-off component 3 is powered on and works. The first switch 35, the first pin 31 and the second switch 36, the second pin 32 are reconnected, and the system automatically switches. The refrigerant leakage cut-off ball valve 4 and the control module use the main power supply 11 for power supply.

[0053] In summary, during the entire operation of the system, the refrigerant leakage cut-off ball valve can also work stably and normally when the main power supply loses power, thus avoiding the inability to shut off the refrigerant when refrigerant leaks and ensuring the stable and safe operation of the system.

[0054] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0055] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and will not be elaborated here.

[0056] The serial numbers of the above embodiments of this application are only for description and do not represent the superiority or inferiority of the embodiments.

[0057] In the above embodiments of this application, the descriptions of the respective embodiments have their own emphases. For the parts not elaborated in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0058] The above is only the preferred embodiment of this application. It should be noted that for those of ordinary skill in the art, without departing from the principle of this application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of this application.

Claims

1. A switching device for supplying power to a refrigerant leakage cut-off ball valve (4), characterized in that: include: A main power supply component (1), the main power supply component (1) having a main power supply (11), the main power supply (11) being used to supply power to the refrigerant leakage shut-off ball valve (4); A backup power supply component (2), the backup power supply component (2) having a backup power supply (21), the backup power supply (21) being used to supply power to the refrigerant leakage shut-off ball valve (4); An on-off assembly (3), wherein the on-off assembly (3) is electrically connected to the main power assembly (1); when the main power assembly (1) supplies power to the on-off assembly (3), the main power supply (11) supplies power to the refrigerant leakage shut-off ball valve (4); and when the main power assembly (1) does not supply power to the on-off assembly (3), the backup power supply (21) supplies power to the refrigerant leakage shut-off ball valve (4).

2. The switching device according to claim 1, characterized in that: The main power supply assembly (1) has an active circuit (12), and the active circuit (12) is used to connect the main power supply (11) and the refrigerant leakage cut-off ball valve (4) so ​​that the refrigerant leakage cut-off ball valve (4) cuts off or opens the flow path, and the refrigerant leakage cut-off ball valve (4) and the main power supply (11) are selectively connected; The backup power supply assembly (2) has a backup circuit (22), and the backup circuit (22) is used to connect the backup power supply (21) and the refrigerant leakage cut-off ball valve (4) so ​​that the refrigerant leakage cut-off ball valve (4) cuts off or opens the flow path. The refrigerant leakage cut-off ball valve (4) and the backup power supply (21) can be selectively connected.

3. The switching device according to claim 2, characterized in that: The active circuit (12) is provided with a first pin (31) and a second pin (32), and the first pin (31) and the second pin (32) are both connected to the main power supply (11); The backup circuit (22) is provided with a third pin (33) and a fourth pin (34), and the third pin (33) and the fourth pin (34) are both connected to the backup power supply (21); The on-off component (3) comprises a first switch (35) and a second switch (36), wherein the first switch (35) is selectively connected to the first pin (31) and the third pin (33), and the second switch (36) is selectively connected to the second pin (32) and the fourth pin (34).

4. The switching device according to claim 3, characterized in that: The first switch (35) is a single-pole double-throw switch; and / or, The second switch (36) is a single-pole double-throw switch.

5. The switching device according to claim 3, characterized in that: The switching device further comprises an on-off circuit (13), wherein the on-off circuit (13) is used to connect the main power source (11) and the on-off component (3), and the on-off circuit (13) is used to control the positions of the first switch (35) and the second switch (36).

6. The switching device according to claim 5, characterized in that: When the main power source (11) supplies power to the on-off circuit (13), the first switch (35) is connected to the first pin (31), and the second switch (36) is connected to the second pin (32); When the main power source (11) does not supply power to the on-off circuit (13), the first switch (35) is connected to the third pin (33), and the second switch (36) is connected to the fourth pin (34).

7. The switching device according to claim 1, characterized in that: The main power supply (11) and the backup power supply (21) are both AC-DC power supplies.

8. A refrigerant cut-off system, characterized in that: include: The switching device according to any one of claims 1 to 7; A refrigerant leakage cut-off ball valve (4), wherein the refrigerant leakage cut-off ball valve (4) is used to prevent refrigerant leakage; A control module, the control module being connected to the refrigerant leakage cut-off ball valve (4) by signal, the control module being used to control the on and off of the refrigerant leakage cut-off ball valve (4).

9. The refrigerant cutoff system according to claim 8, characterized in that: The control module has a detection component, and the detection component is used to detect the refrigerant concentration in the environment.

10. An air conditioning system, comprising a switching device, characterized in that: The switching device is the switching device described in any one of claims 1-7.

Images