Response device for refrigerant leakage and refrigeration system

Abstract

The application discloses a refrigerant leakage response device and a refrigeration system, which can quickly respond to refrigerant leakage, prevent continuous refrigerant leakage and improve the safety of a data center room. The device comprises a first refrigerant leakage detection component, a first valve, a second valve, a first relay, a second relay and a third relay. The first refrigerant leakage detection component is arranged in an indoor unit of a refrigeration device. An output end of the first refrigerant leakage detection component is connected to a control end of the first relay. A load end of the first relay is respectively connected to a control end of the second relay and a control end of the third relay. A load end of the second relay is respectively connected to the first valve and the second valve. A load end of the third relay is connected to a driver of a compressor. The first relay is used for, in the case that the first refrigerant leakage detection component detects refrigerant leakage, linkage of the second relay to control the closing of the first valve and the second valve, and linkage of the third relay to control the signal output of the driver.

Description

Technical Field

[0001] This application relates to the field of refrigeration equipment technology, and in particular to a refrigerant leakage response device and refrigeration system. Background Technology

[0002] Currently, small and medium-sized air conditioners in data center computer rooms still mainly use refrigerant systems, and due to environmental protection requirements, the refrigerant is gradually being converted to R32, R454B, etc., which have lower Global Warming Potential (GWP).

[0003] R32 and R454B belong to the A2L type of refrigerant. Although A2L type refrigerant is a low-flammability and weak-toxicity refrigerant, it still poses an explosion hazard when its concentration reaches a certain level. Moreover, the future trend is to develop A3 type refrigerant, which is low-toxicity and highly flammable, and its danger is even greater.

[0004] Data center server rooms contain numerous air conditioning units and are relatively enclosed environments. If a large amount of refrigerant leaks, both the equipment and maintenance personnel will be in a dangerous situation. Therefore, refrigerant leakage is a safety hazard that cannot be ignored in data center server rooms. Utility Model Content

[0005] This application provides a refrigerant leak response device and a refrigeration system for quickly responding to refrigerant leaks, preventing continuous refrigerant leakage, and improving the security of data center computer rooms.

[0006] In a first aspect, embodiments of this application provide a refrigerant leak response device applied to refrigeration equipment, comprising: a first refrigerant leak detection component, a first valve, a second valve, a first relay, a second relay, and a third relay, wherein... The first refrigerant leak detection component is installed in the indoor unit of the refrigeration equipment; the first valve is installed on the pipeline between the compressor and the evaporator of the refrigeration equipment; and the second valve is installed on the pipeline between the electronic expansion valve and the liquid receiver of the refrigeration equipment. The output terminal of the first refrigerant leak detection component is connected to the control terminal of the first relay, the load terminal of the first relay is connected to the control terminal of the second relay and the control terminal of the third relay, the load terminal of the second relay is connected to the first valve and the second valve, and the load terminal of the third relay is connected to the compressor driver. The first relay is used to, when the first refrigerant leak detection component detects a refrigerant leak, link the second relay to control the closure of the first valve and the second valve, and link the third relay to control the closure of the signal output of the driver.

[0007] In the aforementioned device, by installing a first refrigerant leak detection component in the indoor unit of the refrigeration equipment, refrigerant leaks can be detected in the indoor unit. When the first refrigerant leak detection component detects a refrigerant leak in the indoor unit, it controls the first valve and the second valve to close via a first relay linked to a second relay, cutting off the flow path of refrigerant between the indoor and outdoor units of the refrigeration equipment. It also controls the signal output of the driver to close via a third relay, stopping the operation of the compressor. This keeps most of the refrigerant in the outdoor unit system of the refrigeration equipment, ensuring that only a small amount of refrigerant leaks inside the computer room. This avoids the safety problems caused by a large accumulation of refrigerant inside the data center computer room, enabling rapid response to refrigerant leaks, preventing continuous refrigerant leaks, and improving the safety of the data center computer room.

[0008] In one possible implementation, the device further includes: a second refrigerant leak detection component, which is disposed in the outdoor unit of the refrigeration equipment, and the output terminal of the second refrigerant leak detection component is connected to the control terminal of the third relay; The third relay is used to control the signal output of the driver to shut down when the second refrigerant leak detection component detects a refrigerant leak.

[0009] In the aforementioned device, by installing a second refrigerant leak detection component in the outdoor unit of the refrigeration equipment, refrigerant leaks can be detected in the outdoor unit. When the second refrigerant leak detection component detects a refrigerant leak in the outdoor unit, it controls the signal output of the driver to shut down the compressor through a third relay, thereby stopping the operation of the compressor. At the same time, it can continuously output an alarm signal to alert the user that a refrigerant leak has occurred, thus providing a rapid response to refrigerant leaks.

[0010] In one possible implementation, the second refrigerant leak detection component includes: a plurality of refrigerant leak sensors connected in parallel at a first location in the outdoor unit.

[0011] In one possible implementation, the second refrigerant leak detection component further includes: a plurality of refrigerant leak sensors connected in series at a second location in the outdoor unit, wherein the probability of refrigerant leak at the second location is lower than the probability of refrigerant leak at the first location, and / or the difficulty of detecting refrigerant leak at the second location is lower than the difficulty of detecting refrigerant leak at the first location.

[0012] In the aforementioned device, multiple refrigerant leak sensors are connected in parallel at a first location in the outdoor unit where the probability of refrigerant leakage is relatively high and / or the difficulty of refrigerant leak detection is relatively high, thereby improving the sensitivity of refrigerant leak detection. Meanwhile, multiple refrigerant leak sensors are connected in series at a second location in the outdoor unit where the probability of refrigerant leakage is relatively low and / or the difficulty of refrigerant leak detection is relatively low, thereby improving the accuracy of refrigerant leak detection and preventing false triggering.

[0013] In one possible implementation, the device further includes: a first switching assembly connected to the load terminal of the first relay; The first relay is also used to: when the first refrigerant leak detection component detects a refrigerant leak, to link the first switch component to switch the power supply of the fan in the indoor unit from the first power supply to the second power supply, wherein the voltage value output by the second power supply is a first preset value.

[0014] In the aforementioned device, when the first refrigerant leak detection component detects a refrigerant leak in the indoor unit, the first relay links the first switch component to switch the power supply of the fan in the indoor unit from the first power supply to the second power supply. This causes the fan in the indoor unit to output exhaust air at a fixed speed, quickly expelling the leaked refrigerant. The leaked refrigerant can then be discharged through the exhaust system of the data center computer room, thereby avoiding safety issues caused by a large accumulation of refrigerant inside the data center computer room and improving the safety of the data center computer room.

[0015] In one possible implementation, the device further includes a second switching assembly connected to the load terminal of the third relay; The first relay is also used to: when the first refrigerant leak detection component detects a refrigerant leak, link the third relay to control the second switching component to switch the power supply of the outdoor unit fan from the third power supply to the fourth power supply, wherein the voltage value output by the fourth power supply is a second preset value; The third relay is also used to: control the second switching assembly to switch the power supply of the outdoor unit fan from the third power supply to the fourth power supply when the second refrigerant leak detection assembly detects a refrigerant leak.

[0016] In the above device, when the first refrigerant leak detection component detects a refrigerant leak in the indoor unit, and / or when the second refrigerant leak detection component detects a refrigerant leak, the second switching component is controlled to switch the power supply of the fan in the outdoor unit from the third power supply to the fourth power supply, so that the fan in the outdoor unit outputs exhaust air at a fixed speed to quickly discharge the leaked refrigerant.

[0017] In one possible implementation, the first refrigerant leak detection component includes: a plurality of refrigerant leak sensors connected in parallel and disposed at a third location in the indoor unit.

[0018] In one possible implementation, the first refrigerant leak detection component further includes: a plurality of refrigerant leak sensors connected in series at a fourth position in the indoor unit, wherein the probability of refrigerant leak at the fourth position is lower than the probability of refrigerant leak at the third position and / or the difficulty of detecting refrigerant leak at the fourth position is lower than the difficulty of detecting refrigerant leak at the third position.

[0019] In the aforementioned device, multiple refrigerant leak sensors are connected in parallel at a third location in the indoor unit where the probability of refrigerant leakage is relatively high and / or the difficulty of refrigerant leak detection is relatively high, thereby improving the sensitivity of refrigerant leak detection. Meanwhile, multiple refrigerant leak sensors are connected in series at a fourth location in the indoor unit where the probability of refrigerant leakage is relatively low and / or the difficulty of refrigerant leak detection is relatively low, thereby improving the accuracy of refrigerant leak detection and preventing false triggering.

[0020] In one possible implementation, the device further includes a fault alarm component connected to the load terminal of the first relay; The first relay is also used to: when the first refrigerant leak detection component detects a refrigerant leak, trigger the fault alarm component to report a refrigerant leak fault alarm.

[0021] Secondly, embodiments of this application provide a refrigeration system, the refrigeration system including at least one refrigeration device and a refrigerant leakage response device provided in the first aspect of embodiments of this application, respectively provided for each of the refrigeration devices. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the refrigerant leakage response device provided in the embodiments of this application; Figure 2 A schematic diagram of the control scheme for the refrigerant leakage response device provided in an embodiment of this application; Figure 3 A schematic diagram of the refrigerant leakage response device provided in the embodiments of this application; Figure 4 A schematic diagram of the control scheme for the refrigerant leakage response device provided in an embodiment of this application; Figure 5 A schematic diagram of the control scheme for the refrigerant leakage response device provided in an embodiment of this application; Figure 6A schematic diagram of the control scheme for the refrigerant leakage response device provided in an embodiment of this application; Figure 7 This is a schematic diagram of the parallel connection of refrigerant leakage sensors provided in the embodiments of this application; Figure 8 This is a schematic diagram of the refrigerant leak sensor connected in series according to an embodiment of this application; Figure 9 A schematic diagram of the overall control scheme of the refrigerant leakage response device provided in the embodiments of this application. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0026] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0027] Before introducing the refrigerant leakage response device and refrigeration system provided in the embodiments of this application, the technical background of the embodiments of this application will be described in detail for ease of understanding.

[0028] Currently, small and medium-sized air conditioners in data center computer rooms still mainly use refrigerant systems, and due to environmental protection requirements, the refrigerant is gradually being converted to R32, R454B, etc., which have lower GWP.

[0029] R32 and R454B belong to the A2L type of refrigerant. Although A2L type refrigerant is a low-flammability and weak-toxicity refrigerant, it still poses an explosion hazard when its concentration reaches a certain level. Moreover, the future trend is to develop A3 type refrigerant, which is low-toxicity and highly flammable, and its danger is even greater.

[0030] Data center server rooms contain numerous air conditioning units and are relatively enclosed environments. If a large amount of refrigerant leaks, both the equipment and maintenance personnel will be in a dangerous situation. Therefore, refrigerant leakage is a safety hazard that cannot be ignored in data center server rooms.

[0031] In view of this, embodiments of this application provide a refrigerant leak response device and a refrigeration system. By installing a first refrigerant leak detection component in the indoor unit of the refrigeration equipment, refrigerant leaks can be detected in the indoor unit. When the first refrigerant leak detection component detects a refrigerant leak in the indoor unit, it controls the closure of the first valve and the second valve through a first relay linked to a second relay, cutting off the flow path of refrigerant between the indoor and outdoor units of the refrigeration equipment. It also controls the signal output of the driver to be turned off through a third relay, stopping the operation of the compressor. This keeps most of the refrigerant in the outdoor unit system of the refrigeration equipment, so that only a small amount of refrigerant leaks inside the computer room. This avoids the safety problems caused by a large accumulation of refrigerant inside the data center computer room, achieves rapid response to refrigerant leaks, prevents continuous refrigerant leaks, and improves the safety of the data center computer room.

[0032] It should be noted that the refrigerant leakage response device provided in this application embodiment is applied in refrigeration equipment, which includes an indoor unit and an outdoor unit. The indoor unit mainly includes components such as an evaporator and an electronic expansion valve, while the outdoor unit mainly includes components such as a compressor, a condenser, and a liquid receiver.

[0033] After introducing the background technology of the embodiments of this application, the refrigerant leakage response device and refrigeration system provided in the embodiments of this application will be described in detail below with reference to specific embodiments.

[0034] See Figure 1 The diagram shows a schematic representation of a refrigerant leak response device according to an embodiment of this application, applied to a refrigeration device. The refrigeration device includes an indoor unit 10 and an outdoor unit 11. The indoor unit 10 includes an evaporator 101 and an electronic expansion valve 102. The outdoor unit 11 includes a compressor 111, a condenser 112, and a liquid receiver 113. The refrigerant leak response device includes: a first refrigerant leak detection component 12, a first valve 13, a second valve 14, a first relay 15, a second relay 16, and a third relay 17.

[0035] The first refrigerant leak detection component 12 is installed in the indoor unit 10 of the refrigeration equipment. The first valve 13 is installed on the pipeline between the compressor 111 and the evaporator 101 of the refrigeration equipment. The second valve 14 is installed on the pipeline between the electronic expansion valve 102 and the liquid receiver 113 of the refrigeration equipment. The first valve 13 is a gas valve, and the second valve 14 is a liquid valve. Both the first valve 13 and the second valve 14 can be solenoid valves, electric angle valves, or electronic expansion valves, etc.

[0036] In practical applications, the first valve 13 can be located at any position on the pipeline between the compressor 111 and the evaporator 101. Similarly, the second valve 14 can be located at any position on the pipeline between the electronic expansion valve 102 and the liquid receiver 113. If the liquid receiver 113 is not used in the outdoor unit 11, the second valve 14 can be located at any position on the pipeline between the electronic expansion valve 102 and the condenser 112.

[0037] The output terminal of the first refrigerant leak detection component 12 is connected to the control terminal of the first relay 15. The load terminal of the first relay 15 is connected to the control terminals of the second relay 16 and the third relay 17 respectively. The load terminal of the second relay 16 is connected to the first valve 13 and the second valve 14 respectively. The load terminal of the third relay 17 is connected to the driver 18 of the compressor 111.

[0038] The first relay 15 is used to, when the first refrigerant leak detection component 12 detects a refrigerant leak, link the second relay 16 to control the closing of the first valve 13 and the second valve 14, and link the third relay 17 to control the closing of the signal output of the driver 18.

[0039] In practical applications, by installing a first refrigerant leak detection component 12 in the indoor unit 10 of the refrigeration equipment, refrigerant leaks can be detected in the indoor unit 10. When the first refrigerant leak detection component 12 detects a refrigerant leak in the indoor unit 10, the first relay 15 links with the second relay 16 to control the closure of the first valve 13 and the second valve 14, cutting off the flow path of the refrigerant between the indoor and outdoor units of the refrigeration equipment. It also links with the third relay 17 to control the signal output of the driver 18 to stop the operation of the compressor 111. This keeps most of the refrigerant in the outdoor unit system of the refrigeration equipment, so that only a small amount of refrigerant leaks inside the computer room. This avoids the safety problems caused by a large accumulation of refrigerant inside the data center computer room, achieves rapid response to refrigerant leaks, prevents continuous refrigerant leaks, and improves the safety of the data center computer room.

[0040] The specific control scheme for this implementation method is as follows: Figure 2 As shown, the output terminal of the first refrigerant leak detection component 12 is connected to the control terminal of the first relay 15. The load terminal of the first relay 15 is connected to the control terminals of the second relay 16 and the third relay 17 respectively. The load terminal of the second relay 16 is connected to the first valve 13 and the second valve 14 respectively. The load terminal of the third relay 17 is connected to the compressor driver 18.

[0041] If the first refrigerant leak detection component 12 does not detect a refrigerant leak, the first valve 13 and the second valve 14 are opened normally, the compressor driver 18 outputs a signal normally, and the compressor operates normally; if the first refrigerant leak detection component 12 detects a refrigerant leak, the first relay 15, in conjunction with the second relay 16, controls the closing of the first valve 13 and the second valve 14, and in conjunction with the third relay 17, controls the closing of the signal output of the driver 18.

[0042] In specific implementation, in addition to installing a first refrigerant leak detection component in the indoor unit to detect refrigerant leaks, this application embodiment can also install a second refrigerant leak detection component in the outdoor unit to detect refrigerant leaks inside the outdoor unit.

[0043] Specifically, in Figure 1 Based on the refrigerant leak response device shown, such as Figure 3 As shown, the refrigerant leakage response device provided in this application embodiment further includes: a second refrigerant leakage detection component 30, which is disposed in the outdoor unit 11 of the refrigeration equipment, and the output terminal of the second refrigerant leakage detection component 30 is connected to the control terminal of the third relay 17.

[0044] The third relay is used to control the signal output of the shut-off drive 18 when the second refrigerant leak detection component 30 detects a refrigerant leak.

[0045] In practical applications, by installing a second refrigerant leak detection component 30 in the outdoor unit 11 of the refrigeration equipment, refrigerant leak detection can be performed in the outdoor unit 11. When the second refrigerant leak detection component 30 detects a refrigerant leak in the outdoor unit 11, the signal output of the driver 18 is controlled by the third relay 17 to stop the operation of the compressor 111. At the same time, an alarm signal can be continuously output to remind the user that a refrigerant leak has occurred, thereby responding quickly to the refrigerant leak.

[0046] The specific control scheme for this implementation method is as follows: Figure 2 Based on the control scheme shown, such as Figure 4 As shown, the output terminal of the second refrigerant leak detection component 30 is connected to the control terminal of the third relay 17.

[0047] If the second refrigerant leak detection component 30 does not detect a refrigerant leak, the compressor driver 18 outputs a normal signal and the compressor operates normally; if the second refrigerant leak detection component 30 detects a refrigerant leak, the third relay 17 controls the signal output of the driver 18 to be turned off.

[0048] In practical applications, in order to prevent the leaked refrigerant from accumulating in large quantities in the indoor and outdoor units of the refrigeration equipment, the refrigerant leakage response device provided in this application embodiment can also be linked to control the fans in the indoor and outdoor units of the refrigeration equipment to provide exhaust air at a fixed speed.

[0049] Specifically, the refrigerant leakage response device provided in this application embodiment further includes: a first switching assembly, which is connected to the load terminal of the first relay.

[0050] The first relay is also used to: when the first refrigerant leak detection component detects a refrigerant leak, link the first switch component to switch the power supply of the indoor unit fan from the first power supply to the second power supply, and the voltage value output by the second power supply is the first preset value.

[0051] The first power supply is the power supply for the normal operation of the indoor unit fan of the refrigeration equipment. It is usually a power supply that outputs analog voltage to facilitate the adjustment of the fan speed. For example, a power supply that outputs 0-10 volts (V) analog voltage. The second power supply is a power supply with an output voltage of the first preset value so that the indoor unit fan provides exhaust air at a fixed speed. The first preset value can be configured according to actual needs. For example, the second power supply can be a power supply with an output voltage of 5V.

[0052] In this scenario, when the first refrigerant leak detection component detects a refrigerant leak in the indoor unit, the first relay, in conjunction with the first switch component, switches the power supply of the indoor unit's fan from the first power supply to the second power supply. This causes the indoor unit's fan to output exhaust air at a fixed speed, quickly expelling the leaked refrigerant. The leaked refrigerant can then be discharged through the data center's ventilation system, thus preventing safety issues caused by a large accumulation of refrigerant inside the data center and improving the data center's security.

[0053] The specific control scheme for this implementation method is as follows: Figure 4 Based on the control scheme shown, such as Figure 5 As shown, the first switch assembly 50 is connected to the load terminal of the first relay 15.

[0054] If the first refrigerant leak detection component 12 does not detect a refrigerant leak, the first valve 13 and the second valve 14 are normally open, the compressor driver 18 outputs a signal normally, the compressor operates normally, and the first switch component 50 connects the first power supply 51 and the fan 53 in the indoor unit. The fan 53 in the indoor unit operates normally and its speed is adjustable. If the first refrigerant leak detection component 12 detects a refrigerant leak, the first relay 15, in conjunction with the second relay 16, controls the closure of the first valve 13 and the second valve 14. The first switch component 50 is also activated to switch the power supply of the fan 53 in the indoor unit from the first power supply 51 to the second power supply 52, so that the fan outputs exhaust air at a fixed speed. At the same time, the third relay 17 is activated to control the shutdown of the signal output of the driver 18.

[0055] Similarly, on the outdoor unit side, the refrigerant leakage response device provided in this application embodiment further includes: a second switching assembly, which is connected to the load terminal of the third relay.

[0056] The first relay is also used to: when the first refrigerant leak detection component detects a refrigerant leak, link the third relay to control the second switching component to switch the power supply of the outdoor unit fan from the third power supply to the fourth power supply, and the voltage value output by the fourth power supply is the second preset value.

[0057] The third relay is also used to: control the second switching assembly to switch the power supply of the outdoor unit fan from the third power supply to the fourth power supply when the second refrigerant leak detection assembly detects a refrigerant leak.

[0058] The third power supply is the power supply for the outdoor unit fan of the refrigeration equipment to operate normally. It is usually a power supply that outputs analog voltage to facilitate the adjustment of the fan speed. For example, a power supply that outputs 0-10 volts (V) analog voltage. The fourth power supply is a power supply with an output voltage of the second preset value so that the outdoor unit fan can provide exhaust air at a fixed speed. The second preset value can be configured according to actual needs. For example, the fourth power supply can be a power supply with an output voltage of 5V.

[0059] In this case, if the first refrigerant leak detection component detects a refrigerant leak in the indoor unit, and / or if the second refrigerant leak detection component detects a refrigerant leak, the second switching component is controlled to switch the power supply of the outdoor unit fan from the third power supply to the fourth power supply, so that the outdoor unit fan outputs exhaust air at a fixed speed to quickly discharge the leaked refrigerant.

[0060] The specific control scheme for this implementation method is as follows: Figure 5 Based on the control scheme shown, such as Figure 6 As shown, the second switch assembly 60 is connected to the load terminal of the third relay 17.

[0061] If neither the first refrigerant leak detection component 12 nor the second refrigerant leak detection component 30 detects a refrigerant leak, the second switch component 60 connects the third power supply 61 and the outdoor unit's fan 63, and the outdoor unit's fan 63 operates normally with adjustable wind speed.

[0062] When the first refrigerant leak detection component 12 detects a refrigerant leak, the first relay 15, in conjunction with the second relay 16, controls the closure of the first valve 13 and the second valve 14. It also triggers the first switch component 50 to switch the power supply of the indoor unit fan 53 from the first power supply 51 to the second power supply 52, so that the fan 53 outputs exhaust air at a fixed speed. Furthermore, it triggers the third relay 17 to control the shutdown of the signal output of the driver 18. Finally, it triggers the third relay 17 to control the second switch component 60 to switch the power supply of the outdoor unit fan 63 from the third power supply 61 to the fourth power supply 62.

[0063] When the second refrigerant leak detection component 30 detects a refrigerant leak, the third relay 17 controls the signal output of the driver 18 to be turned off, and at the same time controls the second switch component 60 to switch the power supply of the outdoor unit fan 63 from the third power supply 61 to the fourth power supply 62, so that the outdoor unit fan 63 outputs exhaust air at a fixed speed.

[0064] This application embodiment detects refrigerant leaks by arranging refrigerant leak detection components in the indoor and outdoor units of the refrigeration equipment. When a refrigerant leak is detected in the indoor unit, most of the refrigerant is controlled in the outdoor unit system, so that only a small amount of refrigerant leaks inside the data center computer room. At this time, it can be discharged through the exhaust system to avoid a significant impact on the operation of the equipment. Moreover, a backup unit can be used to replace the refrigeration equipment with refrigerant leaks. After the refrigeration equipment with refrigerant leaks is dealt with, it can continue to operate.

[0065] Although the refrigerant will not leak into the computer room after the outdoor unit leaks refrigerant, the leak will affect the stability of the temperature inside the computer room. Therefore, the leak needs to be dealt with. So when the outdoor unit refrigerant leak is detected, the compressor is stopped, the outdoor fan is started and an alarm is triggered.

[0066] In practical applications, in order to realize fault alarm, the refrigerant leakage response device provided in this application embodiment further includes: a fault alarm component, which is connected to the load terminal of the first relay.

[0067] The first relay is also used to: when the first refrigerant leak detection component detects a refrigerant leak, link the fault alarm component to report a refrigerant leak fault alarm.

[0068] In specific implementation, the embodiments of the present application can also be configured that the refrigerant leakage fault alarm has a higher priority, and when the refrigeration equipment reports a refrigerant leakage fault alarm, other fault alarms will not be reported temporarily.

[0069] Of course, in practical applications, the fault alarm component can be connected to the load end of the third relay, so that when the second refrigerant leakage detection component detects refrigerant leakage, the fault alarm component is linked to report the refrigerant leakage fault alarm; alternatively, the fault alarm component is communicatively connected to the driver of the compressor, and when the second refrigerant leakage detection component detects refrigerant leakage, the driver of the compressor is linked and controlled to be turned off, and at this time the driver of the compressor sends the fault information of refrigerant leakage in the outdoor unit to the fault alarm component, realizing the fault reporting of refrigerant leakage in the outdoor unit.

[0070] In specific implementation, the first refrigerant leakage detection component and the second refrigerant leakage detection component provided by the embodiments of the present application may both include refrigerant leakage sensors arranged at multiple points.

[0071] Wherein, the refrigerant leakage sensor can adopt a refrigerant leakage sensor that outputs and feeds back through DO and RS485. The DO of the refrigerant leakage sensor is normally open by default, the DO is normally closed after the refrigerant leakage sensor is powered on, and the DO becomes normally open when refrigerant is detected, which conforms to the fail-safe principle, and its state table is shown in Table 1 below.

[0072]

[0073] Table 1

[0074] After refrigerant leakage, the hardware control principle is executed: based on the dry contact on-off signal given by the DO port of the sensor, the corresponding relay is driven to perform linkage control. Of course, in other embodiments of the present application, the refrigerant leakage sensor can also be a refrigerant leakage sensor that only outputs and feeds back DO.

[0075] Specifically, the second refrigerant leakage detection component comprises: a plurality of refrigerant leakage sensors connected in parallel and arranged at a first position in an outdoor unit. Taking two refrigerant leakage sensors connected in parallel as an example, the connection structure thereof is as shown in Figure 7 , the output DOs of the first refrigerant leakage sensor and the second refrigerant leakage sensor are connected in parallel to control the corresponding relay.

[0076] In some embodiments, the second refrigerant leakage detection component further comprises: a plurality of refrigerant leakage sensors connected in series and arranged at a second position in the outdoor unit. Taking two refrigerant leakage sensors connected in parallel as an example, the connection structure thereof is as shown in Figure 8 , the output DOs of the first refrigerant leakage sensor and the second refrigerant leakage sensor are connected in series to control the corresponding relay.

[0077] In practical applications, the probability of refrigerant leakage at the second location is lower than that at the first location, and / or the difficulty of detecting refrigerant leakage at the second location is lower than that at the first location.

[0078] For example, the first location could be a place where refrigerant is prone to leakage and difficult to detect, such as the top or bottom of the outdoor unit. The second location could be a place where refrigerant is not prone to leakage and easy to detect, such as near the fan or refrigerant transmission pipeline.

[0079] On the indoor unit side, the first refrigerant leak detection component may include: multiple refrigerant leak sensors connected in parallel and disposed at a third location in the indoor unit.

[0080] In some embodiments, the first refrigerant leak detection component may further include: a plurality of refrigerant leak sensors connected in series at a fourth location in the indoor unit. The probability of refrigerant leak at the fourth location is lower than the probability of refrigerant leak at the third location, and / or the difficulty of detecting refrigerant leak at the fourth location is lower than the difficulty of detecting refrigerant leak at the third location.

[0081] For example, the third location could be a place where refrigerant leaks are easy to detect, such as the top or bottom of the indoor unit. The fourth location could be a place where refrigerant leaks are not easy to detect, such as near the fan or refrigerant transmission pipeline.

[0082] In the refrigerant leakage response device provided in this application embodiment, multiple refrigerant leakage sensors are set in parallel at locations in the indoor and outdoor units of the refrigeration equipment where the probability of refrigerant leakage is high and / or the difficulty of refrigerant leakage detection is high, thereby improving the sensitivity of refrigerant leakage detection. Meanwhile, multiple refrigerant leakage sensors are set in series at locations where the probability of refrigerant leakage is low and / or the difficulty of refrigerant leakage detection is low, thereby improving the accuracy of refrigerant leakage detection and preventing false triggering.

[0083] In practical applications, when multiple cooling devices are configured in a data center, for each individual cooling device, this application embodiment can also install refrigerant leakage sensors at other flammable or detectable locations (such as smoke, fire alarms, etc.) outside the cooling device cabinet to detect whether other cooling devices are leaking refrigerant. If a refrigerant leak is detected in another cooling device, the cooling device can perform operations such as forced ventilation and stopping the compressor to help remove the refrigerant from the data center.

[0084] The above provides a detailed description of the refrigerant leakage response device provided in the embodiments of this application. The following section, in conjunction with... Figure 9 Taking a refrigerant leak sensor with DO output and RS485 output feedback as an example, the overall control process of the refrigerant leak response device provided in this application embodiment will be described.

[0085] The RS485 outputs of the first refrigerant leak detection component 12 and the second refrigerant leak detection component 30 are both connected to the RS485 port of the control board 90. They can send the refrigerant leak values ​​they detect to the control board 90. The main control board 90 can be the main control board of the refrigeration equipment or the main control board of the control platform.

[0086] When the first refrigerant leak detection component 12 is powered on normally and no refrigerant is detected, the output DO port remains closed, and the relay KA1 coil is energized. At this time, the relay KA2 coil is energized, controlling the first valve 13 and the second valve 14 to open. The indoor unit's fan 53 control line is closed at the output terminal of the 0-10V analog power supply, and the control board can normally control the speed of the fan 53. The control board's digital input DI port receives a closed signal and defines it as a normal state where no refrigerant leak occurs. The relay KA3 coil is energized, controlling the compressor driver 18 to output a normal signal. The driver 18 can work normally to drive the compressor and control the outdoor fan 63 to use an adjustable power supply, and its speed can be adjusted.

[0087] When the first refrigerant leak detection component 12 is powered on normally and detects a refrigerant leak, the output DO port is in an open state, the relay KA1 coil is de-energized, and the relay KA2 coil is de-energized, controlling the first valve 13 and the second valve 14 to close; the fan 53 control line switches to the output port of the 5V power supply, outputting exhaust air at a fixed speed; the control board digital input DI port receives a disconnect signal and defines it as a refrigerant leak state, triggering a system alarm; the outdoor unit side relay KA3 is de-energized, controlling the driver 18 to close the signal output, controlling the compressor to safely stop, and controlling the outdoor fan 63 to switch the power supply to a fixed power supply, which outputs exhaust air at a fixed speed.

[0088] If the second refrigerant leak detection component 30 detects a refrigerant leak, the relay KA3 loses power, the control driver 18 shuts off the signal output, the compressor is safely stopped, and the outdoor fan 63 switches its power supply to a fixed power supply, which outputs exhaust air at a fixed speed.

[0089] Overall, Figure 9 The detection status of the first refrigerant leak detection component and the second refrigerant leak detection component, the status of each relay, the power supply status of each fan, and the status of the DI port of the control board in the control scheme shown are shown in Table 2 below.

[0090]

[0091] Table 2

[0092] Based on the same concept, embodiments of this application also provide a refrigeration system, which includes at least one refrigeration device and a refrigerant leakage response device provided as in the first aspect of embodiments of this application, corresponding to each refrigeration device.

[0093] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A refrigerant leakage response device, applied to refrigeration equipment, characterized in that, include: The components include a first refrigerant leak detection assembly (12), a first valve (13), a second valve (14), a first relay (15), a second relay (16), and a third relay (17), among which... The first refrigerant leakage detection component (12) is installed in the indoor unit (10) of the refrigeration equipment, the first valve (13) is installed on the pipeline between the compressor (111) and the evaporator (101) of the refrigeration equipment, and the second valve (14) is installed on the pipeline between the electronic expansion valve (102) and the liquid storage tank (113) of the refrigeration equipment. The output terminal of the first refrigerant leak detection component (12) is connected to the control terminal of the first relay (15). The load terminal of the first relay (15) is connected to the control terminal of the second relay (16) and the control terminal of the third relay (17). The load terminal of the second relay (16) is connected to the first valve (13) and the second valve (14). The load terminal of the third relay (17) is connected to the driver (18) of the compressor (111). The first relay (15) is used to control the first valve (13) and the second valve (14) to close when the first refrigerant leakage detection component (12) detects refrigerant leakage, and to control the signal output of the driver (18) to close when the first refrigerant leakage detection component (12) detects refrigerant leakage.

2. The apparatus according to claim 1, characterized in that, The device further includes: a second refrigerant leak detection component (30), which is disposed in the outdoor unit (11) of the refrigeration equipment, and the output terminal of the second refrigerant leak detection component (30) is connected to the control terminal of the third relay (17); The third relay (17) is used to control the signal output of the driver (18) to shut down when the second refrigerant leak detection component (30) detects a refrigerant leak.

3. The apparatus according to claim 2, characterized in that, The second refrigerant leak detection component (30) includes a plurality of refrigerant leak sensors connected in parallel at a first location in the outdoor unit (11).

4. The apparatus according to claim 3, characterized in that, The second refrigerant leak detection component (30) further includes: a plurality of refrigerant leak sensors connected in series at a second position in the outdoor unit (11), wherein the probability of refrigerant leak at the second position is lower than the probability of refrigerant leak at the first position, and / or the difficulty of detecting refrigerant leak at the second position is lower than the difficulty of detecting refrigerant leak at the first position.

5. The apparatus according to any one of claims 1-4, characterized in that, The device further includes: a first switch assembly (50), which is connected to the load terminal of the first relay (15); The first relay (15) is also used to: when the first refrigerant leakage detection component (12) detects refrigerant leakage, link the first switch component (50) to switch the power supply of the fan (53) in the indoor unit from the first power supply (51) to the second power supply (52), and the voltage value output by the second power supply (52) is a first preset value.

6. The apparatus according to any one of claims 2-4, characterized in that, The device further includes a second switching assembly (60), which is connected to the load terminal of the third relay (17); The first relay (15) is also used to: when the first refrigerant leakage detection component (12) detects refrigerant leakage, link the third relay (17) to control the second switch component (60) to switch the power supply of the fan (63) in the outdoor unit (11) from the third power supply (61) to the fourth power supply (62), and the voltage value output by the fourth power supply (62) is a second preset value; The third relay (17) is also used to: control the second switch assembly (60) to switch the power supply of the fan (63) in the outdoor unit (11) from the third power supply (61) to the fourth power supply (62) when the second refrigerant leakage detection assembly (30) detects a refrigerant leak.

7. The apparatus according to any one of claims 1-4, characterized in that, The first refrigerant leak detection component (12) includes a plurality of refrigerant leak sensors connected in parallel at a third location in the indoor unit (10).

8. The apparatus according to claim 7, characterized in that, The first refrigerant leak detection component (12) further includes: a plurality of refrigerant leak sensors connected in series at a fourth position in the indoor unit (10), wherein the probability of refrigerant leak at the fourth position is lower than the probability of refrigerant leak at the third position and / or the difficulty of detecting refrigerant leak at the fourth position is lower than the difficulty of detecting refrigerant leak at the third position.

9. The apparatus according to any one of claims 1-4, characterized in that, The device further includes: a fault alarm component, which is connected to the load terminal of the first relay (15); The first relay (15) is also used to: when the first refrigerant leak detection component (12) detects a refrigerant leak, link the fault alarm component to report a refrigerant leak fault alarm.

10. A refrigeration system, characterized in that, The refrigeration system includes at least one refrigeration device and a refrigerant leakage response device as described in any one of claims 1-9, respectively provided for each of the refrigeration devices.

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