Sensor mounting structure and air conditioning unit

Abstract

The utility model discloses a sensor mounting structure and air conditioning unit, include: refrigerant sensor, it is used for detecting whether the refrigerant leak occurs, drive mechanism, it corresponds the refrigerant sensor of installation, guide rail mechanism, contact surface with drive mechanism's output end sliding connection, guide rail mechanism along the air outlet circumferential extension, its cross section presents closed ring, drive mechanism is used for driving refrigerant sensor along guide rail mechanism circulation removes, the utility model discloses a drive mechanism drives refrigerant sensor and circulates and removes along guide rail mechanism to cover greater refrigerant detection area, ensure when refrigerant leak can detect leak early and accurately, improve the security of system and user's use experience feeling.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and in particular to a sensor mounting structure and an air conditioning unit. Background Technology

[0002] In air conditioning systems, refrigerant leakage has become a key bottleneck restricting product safety and energy efficiency. Traditional refrigerant leak detection solutions are limited by cost, typically using a single fixed sensor to detect whether a leak has occurred in the surrounding area. However, its limitations are as follows:

[0003] A single sensor can only monitor a local area. If the leak point is far from the sensor (such as at the far end of the air outlet or at the bend of the pipe), the detection delay can be several hours or even days. Furthermore, fixed sensors are easily affected by factors such as airflow disturbances and temperature fluctuations, making it difficult to detect refrigerant leaks in a timely manner. This can affect the safety of the air conditioning system and the user experience. In addition, the position of the sensor cannot be flexibly adjusted after it is fixedly installed. Utility Model Content

[0004] This invention provides a sensor mounting structure and an air conditioning unit to solve the problem in the prior art where the sensor cannot be moved, resulting in the ability to detect refrigerant leaks in only a localized area and a large detection delay.

[0005] The technical solution of this utility model is a sensor mounting structure, including:

[0006] Refrigerant sensor, used to detect whether refrigerant is leaking;

[0007] The drive mechanism is equipped with a refrigerant sensor.

[0008] The guide rail mechanism has a contact surface that is slidably connected to the output end of the drive mechanism; the guide rail mechanism extends circumferentially along the air outlet and its cross-section is a closed ring.

[0009] The drive mechanism is used to drive the refrigerant sensor to move cyclically along the guide rail mechanism.

[0010] Furthermore, the driving mechanism includes a first driving unit, a transmission shaft, and rolling elements;

[0011] The guide rail mechanism has two contact surfaces symmetrically arranged along its length, each having a first groove. Each first groove is matched with a rolling element to form a rolling pair. The rolling elements are all connected to the output shaft of the first drive unit via the transmission shaft.

[0012] Furthermore, a refrigerant sensor is installed on the housing of the first drive unit.

[0013] Furthermore, each of the rolling elements is connected to the two output shafts of the dual-output reducer via a drive shaft, and the input shaft of the dual-output reducer is connected to the output shaft of the first drive unit.

[0014] Furthermore, each of the rolling elements is connected to the output shaft of one of the first drive units via a transmission shaft. At least one of the first drive units is provided with an encoder unit containing a speed detection module and a closed-loop control unit. The closed-loop control unit is communicatively connected to the encoder unit and is used to control all the first drive units to rotate synchronously.

[0015] Furthermore, the drive mechanism includes a second drive unit, a reduction gear set, and a rack;

[0016] The guide rail mechanism has a closed-loop second slide groove along its length. A rack is coaxially arranged on the bottom wall of the second slide groove. The rack meshes with the output gear of the reduction gear set. The input shaft of the reduction gear set is connected to the output shaft of the second drive unit.

[0017] The housing of the reduction gear set is connected to the housing of the second drive unit, and the housing of the second drive unit is fitted with a refrigerant sensor.

[0018] The housing of the reduction gear set forms a sliding pair by matching the slider with the second slide groove.

[0019] Furthermore, the drive mechanism also includes a coupling;

[0020] The input shaft of the reduction gear set is connected to the output shaft of the second drive unit via the coupling.

[0021] Furthermore, a heating mechanism is provided around the probe of the refrigerant sensor to prevent the probe of the refrigerant sensor from freezing.

[0022] Furthermore, a honeycomb rectifier is coaxially sleeved around the probe of the refrigerant sensor, and an annular airflow channel is formed between the honeycomb rectifier and the probe surface of the refrigerant sensor; the honeycomb rectifier is used to laminate the airflow passing through the probe.

[0023] Furthermore, the windward side of the refrigerant sensor is provided with inclined guide vanes at intervals, and the projected area of ​​the inclined guide vanes in the airflow direction is greater than the maximum projected area of ​​the refrigerant sensor in the same airflow direction.

[0024] This utility model also proposes an air conditioning unit, wherein the air outlet of the air conditioning unit is fitted with a sensor mounting structure as described above.

[0025] Compared with the prior art, the present invention has at least the following beneficial effects:

[0026] This invention uses a drive mechanism to move the refrigerant sensor cyclically along the guide rail mechanism, thereby covering a larger refrigerant detection area. This ensures that refrigerant leaks can be detected as early and accurately as possible, improving system safety and user experience. Attached Figure Description

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects and not to describe a particular order.

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the sensor mounting structure proposed in this utility model moving counterclockwise;

[0030] Figure 2 This is a schematic diagram of the sensor mounting structure proposed in this utility model moving clockwise;

[0031] Figure 3 This is a schematic diagram of the first part of the sensor mounting structure proposed in this utility model.

[0032] Figure 4 This is a first module block diagram of the sensor mounting structure proposed in this utility model;

[0033] Figure 5 This is a schematic diagram of the second part of the sensor mounting structure proposed in this utility model.

[0034] Figure 6 This is a second module block diagram of the sensor mounting structure proposed in this utility model;

[0035] Figure 7 This is a first logical diagram of the sensor mounting structure proposed in this utility model.

[0036] Figure 8 This is a second logical diagram of the sensor mounting structure proposed in this utility model.

[0037] Figure label:

[0038] 10. Refrigerant sensor;

[0039] 20. Drive mechanism; 201. First drive unit; 202. Transmission shaft; 203. Rolling element; 204. Dual-output reducer; 205. Encoder unit; 206. Closed-loop control unit; 207. Second drive unit; 208. Reduction gear set;

[0040] 30. Guide rail mechanism; 301. First slide rail; 302. Second slide rail;

[0041] 40. Air vent;

[0042] 50. Control unit;

[0043] 60. Heating mechanism;

[0044] 70. Temperature sensor;

[0045] 80. Evaporator;

[0046] 90. Refrigerant piping;

[0047] 100. Electronic expansion valve. Detailed Implementation

[0048] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the present utility model, and does not imply that every embodiment of the present utility model must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0049] The principle and structure of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0050] Existing technologies typically use a single fixed sensor to detect whether there is a refrigerant leak in the surrounding area, but its limitations are:

[0051] A single sensor can only monitor a local area. If the leak point is far from the sensor (such as at the far end of the air outlet or at the bend of the pipe), the detection delay can be several hours or even days. Furthermore, fixed sensors are easily affected by factors such as airflow disturbances and temperature fluctuations, making it difficult to detect refrigerant leaks in a timely manner. This can affect the safety of the air conditioning system and the user experience. In addition, the position of the sensor cannot be flexibly adjusted after it is fixedly installed.

[0052] Therefore, in some embodiments, to address the problem that the sensor cannot move, resulting in the ability to detect refrigerant leaks only in localized areas and causing significant detection delays, such as... Figures 1-3 As shown, this utility model proposes a sensor mounting structure, including:

[0053] Refrigerant sensor 10 is used to detect whether refrigerant leakage has occurred;

[0054] The drive mechanism 20 is equipped with a refrigerant sensor 10.

[0055] The guide rail mechanism 30 has a contact surface that is slidably connected to the output end of the drive mechanism 20; the guide rail mechanism 30 extends circumferentially along the air outlet 40, and its cross-section is a closed ring.

[0056] The drive mechanism 20 is used to drive the refrigerant sensor 10 to move cyclically along the guide rail mechanism 30.

[0057] It should be noted that the air outlet 40 proposed in this embodiment is preferably the air outlet of the air conditioning unit, and the main control unit 50 of the air conditioning unit is electrically connected to the refrigerant sensor 10 and the drive mechanism 20 respectively (e.g., Figure 4 (As shown).

[0058] In this way, the present invention can drive the refrigerant sensor 10 to move cyclically along the guide rail mechanism 30 through the drive mechanism 20, thereby covering a larger refrigerant detection area, ensuring that the leak can be detected as early and accurately as possible when the refrigerant leaks, improving the safety of the system and the user experience.

[0059] Furthermore, compared to the solution of setting multiple refrigerant sensors to cover the refrigerant detection area, this embodiment uses the drive mechanism 20 to drive the refrigerant sensor 10 to move cyclically along the guide rail mechanism 30, which can reduce the number of refrigerant sensors 10 and reduce manufacturing costs.

[0060] Specifically, such as Figure 7 As shown, the sensor mounting structure proposed in this embodiment has the following detection modes:

[0061] Firstly, the basic scanning mode: Upon startup, the drive mechanism 20 moves the refrigerant sensor 10 along the guide rail mechanism 30 at a constant speed V1m / s, covering the entire detection area. This mode is suitable for routine inspections or low-risk scenarios. If an abnormal refrigerant concentration is detected in this mode, the system will switch to a focused monitoring mode.

[0062] Key monitoring mode: If an abnormal refrigerant concentration is detected, the drive mechanism 20 will cause the refrigerant sensor 10 to decelerate and pause in the suspected leak area for re-inspection, reducing the speed to V3m / s and extending the sampling time. Based on historical leak data, high-risk areas (such as pipe connections and near valves) will be scanned first. If the refrigerant concentration exceeds the threshold C in N samples taken within the predetermined time... max The refrigerant sensor 10 will then identify the area as a refrigerant leak zone. The drive mechanism 20 will then move the refrigerant sensor 10 to stop in the refrigerant leak zone, and the refrigerant sensor 10 will simultaneously send a refrigerant leak alarm to the main control unit 50. The main control unit 50 will then report this to the backend, and the backend personnel will promptly dispatch maintenance personnel for repairs. Of course, if the refrigerant concentration sampled N times within the predetermined time does not exceed the threshold C... max If the main control unit 50 determines that it is a false detection, the drive mechanism 20 will drive the refrigerant sensor 10 to continue moving at the original speed.

[0063] Third, energy-saving mode: When the equipment with the sensor mounting structure is not started, the drive mechanism 20 can be set to drive the refrigerant sensor 10 to run at a speed of V2m / s; when the equipment is started, the speed is adjusted to V1m / s.

[0064] It is understood that the air outlet of the air conditioning unit proposed in this embodiment is provided with pipe connection points and valves. The pipe connection points will appear at the inlet of the evaporator 80, and the valves are preferably electronic expansion valves 100. Therefore, the refrigerant sensor 10 moving along the guide rail mechanism 30 will pass through the pipe connection points and valves, and the pipe connection points and valves are also high-risk areas where refrigerant leakage is likely to occur.

[0065] In some embodiments, to ensure that the drive mechanism 20 can stably drive the refrigerant sensor 10 to move along the guide rail mechanism 30, such as Figure 3 As shown, this embodiment presents a specific structure of one type of drive mechanism 20:

[0066] The drive mechanism 20 includes a first drive unit 201, a transmission shaft 202, and a rolling element 203;

[0067] The guide rail mechanism 30 has two contact surfaces symmetrically arranged along its length direction, each having a first groove 301. Each first groove 301 is matched with the rolling element 203 to form a rolling pair. The rolling elements 203 are all connected to the output shaft of the first drive unit 201 through the transmission shaft 202.

[0068] Furthermore, a refrigerant sensor 10 is installed on the housing of the first drive unit 201.

[0069] It should be noted that the first driving unit 201 proposed in this embodiment is preferably a stepper motor, and the rolling element 203 proposed in this embodiment is preferably a cylindrical roller.

[0070] Therefore, when the sensor mounting structure is activated, the main control unit 50 will simultaneously activate the refrigerant sensor 10 and the first drive unit 201. Then, the first drive unit 201 will drive the rolling element 203 to circulate on the first slide groove 301 through the transmission shaft 202. This will cause the refrigerant sensor 10, which is mounted on the housing of the first drive unit 201, to circulate along the first slide groove 301, thereby covering a larger refrigerant detection area. This ensures that the leak can be detected as early and accurately as possible when the refrigerant leaks, improving the safety of the system and the user experience.

[0071] In some embodiments, such as Figure 3 As shown, this embodiment proposes one connection structure between the rolling element 203 and the first driving unit 201:

[0072] Each of the rolling elements 203 is connected to the two output shafts of the dual-output reducer 204 via a transmission shaft 202, and the input shaft of the dual-output reducer 204 is connected to the output shaft of the first drive unit 201.

[0073] It should be noted that the number of first drive units 201 proposed in this embodiment is preferably one. Furthermore, the two output shafts of the dual-output reducer 204 proposed in this embodiment are arranged vertically, so that the two rolling elements 203 form an up-down arrangement, which is equivalent to the two first sliding grooves 301 being located on the top and bottom walls of the guide rail mechanism 30 along the vertical direction, respectively.

[0074] Therefore, the first drive unit 201 in this embodiment enables the two rolling elements 203 to move at the same speed and torque through the dual output reducer 204, thereby avoiding asynchronous phenomena caused by electrical delay or uneven load.

[0075] In some embodiments, such as Figure 4 As shown, this embodiment proposes another connection structure between the rolling element 203 and the first driving unit 201:

[0076] Each of the rolling elements 203 is connected to the output shaft of one of the first drive units 201 via a drive shaft 202. At least one of the first drive units 201 is provided with an encoder unit 205 containing a speed detection module and a closed-loop control unit 206. The closed-loop control unit 206 is communicatively connected to the encoder unit 205 and is used to control all the first drive units 201 to rotate synchronously.

[0077] It should be noted that the number of the first driving unit 201 proposed in this embodiment is preferably two.

[0078] The closed-loop control unit 206 will be configured as follows:

[0079] (1) The speed feedback signals of the two first drive units 201 are obtained in real time through the speed detection module;

[0080] (2) Generate speed compensation commands based on PID algorithm;

[0081] (3) Adjust the input power of the two first drive units 201 so that their speeds are the same or the speed difference between them is ≤1% of the rated value.

[0082] Specifically, the closed-loop control unit 206 achieves synchronous speed as follows:

[0083] The main control unit 50 sends a synchronization command to the closed-loop control unit 206. Then, the closed-loop control unit 206 first uses one of the first drive units 201 as the main controller, and the speed feedback signal of the main controller is used as the reference input of the PID algorithm. Then, the closed-loop control unit 206 performs a differential comparison between the speed feedback signal of the other first drive unit 201 and the reference input, and outputs a PWM modulation signal to the inverter of the other first drive unit 201 through proportional-integral-derivative operation, thereby adjusting the input power of the other first drive unit 201 so that the speeds of the two first drive units 201 are the same or the speed difference between the two first drive units 201 is ≤1% of the rated value.

[0084] In other embodiments, to ensure that the drive mechanism 20 can stably drive the refrigerant sensor 10 to move along the guide rail mechanism 30, such as... Figures 5-6 As shown, this embodiment presents another specific structure for the drive mechanism 20:

[0085] The drive mechanism 20 includes a second drive unit 207, a reduction gear set 208, and a rack;

[0086] The guide rail mechanism 30 is provided with a closed annular second slide groove 302 along its length direction. A rack is coaxially arranged on the bottom wall of the second slide groove 302. The rack meshes with the output gear of the reduction gear set 208. The input shaft of the reduction gear set 208 is connected to the output shaft of the second drive unit 207.

[0087] The housing of the reduction gear set 208 is connected to the housing of the second drive unit 207, and the housing of the second drive unit 207 is fitted with a refrigerant sensor 10.

[0088] The housing of the reduction gear set 208 forms a sliding pair by matching the slider with the second slide groove 302.

[0089] It should be noted that the second drive unit 207 proposed in this embodiment is preferably a servo motor.

[0090] Thus, when the sensor mounting structure of this embodiment is started, the main control unit 50 will simultaneously start the refrigerant sensor 10 and the second drive unit 207. The second drive unit 207 will drive the output gear of the reduction gear set 208 to rotate relative to the rack, thereby causing the housing of the reduction gear set 208 to slide cyclically on the second slide groove 302 through the slider. This allows the refrigerant sensor 10 mounted on the housing of the second drive unit 207 to slide synchronously along the second slide groove 302 with the reduction gear set 208, thereby covering a larger refrigerant detection area. This ensures that the leak can be detected as early and accurately as possible when the refrigerant leaks, improving the safety of the system and the user experience.

[0091] Specifically, the drive mechanism 20 also includes a coupling;

[0092] The input shaft of the reduction gear set 208 is connected to the output shaft of the second drive unit 207 via the coupling.

[0093] In this way, the coupling transmits the torque of the second drive unit 207 and compensates for minor installation deviations (such as radial / angular deviations) between the output shaft of the second drive unit 207 and the input shaft of the reduction gear set 208, thereby ensuring the connection stability between the second drive unit 207 and the reduction gear set 208.

[0094] In other embodiments, the guide rail mechanism 30 is preferably made of a corrosion-resistant alloy, and the surface of the guide rail mechanism 30 is coated with an insulating layer to avoid electrostatic interference.

[0095] In some embodiments, such as Figure 4 and Figure 6 As shown, a heating mechanism 60 is matched to the outer periphery of the probe of the refrigerant sensor 10. The heating mechanism 60 is used to prevent the probe of the refrigerant sensor 10 from freezing.

[0096] It is understood that the heating mechanism 60 proposed in this embodiment is preferably a heating band, and the heating band can be continuously arranged around the outer periphery of the probe of the refrigerant sensor 10.

[0097] The housing of the first drive unit 201 or the housing of the second drive unit 207 is equipped with a corresponding temperature sensor 70. If the temperature detected by the temperature sensor 70 is lower than the preset temperature, the temperature sensor 70 will determine that the refrigerant sensor 10 and its probe have frozen. At this time, the temperature sensor 70 will send a low-temperature electrical signal to the main control unit 50. After receiving the signal, the main control unit 50 will start the heating mechanism 60 to raise the temperature of the probe of the refrigerant sensor 10, ensuring that the probe of the refrigerant sensor 10 will not freeze, ensuring that the probe of the refrigerant sensor 10 can normally detect the surrounding refrigerant concentration, and reducing the refrigerant detection delay.

[0098] In other embodiments, the probe of the refrigerant sensor 10 can also be coated with a fluorosilicone nano-coating (ice adhesion strength ≤20kPa) to make the ice layer easy to detach.

[0099] In some embodiments (not shown in the figures), a honeycomb rectifier is coaxially sleeved around the probe of the refrigerant sensor 10, and an annular airflow channel is formed between the honeycomb rectifier and the probe surface of the refrigerant sensor 10; the honeycomb rectifier is used to laminate the airflow passing through the probe.

[0100] It should be noted that the cellular rectifier is preferably made of 316L stainless steel.

[0101] In this way, this embodiment can divide large-scale eddies by dense micro-holes in the honeycomb rectifier, transforming irregular turbulence into parallel laminar flow and significantly reducing the amplitude of airflow pulsation. Furthermore, the honeycomb rectifier can force the airflow to be uniformly distributed along the axial direction, eliminating the difference between local high-speed and low-speed regions, ensuring the consistency of the airflow velocity field contacted by the probe of the refrigerant sensor 10. This avoids airflow interference with the refrigerant accuracy detected by the probe of the refrigerant sensor 10, ensuring that leaks can be detected as early and accurately as possible when refrigerant leaks occur, thereby improving system safety and user experience.

[0102] Specifically, the honeycomb rectifier has a pore diameter ≤ 3mm, a pore depth to pore diameter ratio of 5:1 to 8:1, and a 5±0.5mm annular airflow channel is formed between the honeycomb rectifier and the probe surface of the refrigerant sensor 10. Of course, the above data can be changed according to the actual situation, and are not limited here.

[0103] In other embodiments, the axial distance between the inlet end face of the cellular rectifier and the sensitive element of the refrigerant sensor 10 is 10-15 mm, thereby further laminating the airflow passing through the probe and further avoiding airflow interference with the refrigerant detection accuracy of the probe of the refrigerant sensor 10.

[0104] In other embodiments (not shown in the figure), the windward side of the refrigerant sensor 10 is provided with inclined guide vanes at intervals, and the projected area of ​​the inclined guide vanes in the airflow direction is greater than the maximum projected area of ​​the refrigerant sensor 10 in the same airflow direction.

[0105] This ensures that the tilting deflector covers a sufficiently large area in the direction of airflow, effectively shielding the refrigerant sensor 10 body and forcing the high-speed airflow to deflect rather than directly impacting the surface of the refrigerant sensor 10, significantly reducing flow velocity fluctuations and turbulence noise, and improving airflow stability and refrigerant measurement accuracy.

[0106] It should be noted that the mounting plane of the inclined guide vane forms an acute angle with the airflow direction, and the inclined guide vane is mounted on the housing of the first drive unit 201 or the housing of the second drive unit 207 by a bracket.

[0107] Furthermore, an anti-interference gap is provided between the leading edge of the inclined guide plate and the sensitive element of the refrigerant sensor 10, preferably 5 to 15 mm. This anti-interference gap physically isolates the inclined guide plate from direct contact or airflow coupling with the sensitive element of the refrigerant sensor 10, preventing mechanical interference and signal distortion caused by vibration, thermal expansion, or turbulence, and maintaining the stability of the refrigerant sensor 10, especially in temperature-changing environments. In addition, this anti-interference gap can also reduce the risk of thermal stress deformation, ensuring that the positioning accuracy of the inclined guide plate does not affect the output reliability of the refrigerant sensor 10 during long-term use.

[0108] In some embodiments, such as Figure 1 As shown, this utility model also proposes an air conditioning unit, wherein the air outlet 40 of the air conditioning unit is fitted with a sensor mounting structure as described above.

[0109] It should be noted that the air outlet 40 proposed in this embodiment is surrounded by a refrigerant pipe 90 that connects to the evaporator 80, and the refrigerant pipe 90 around the air outlet 40 is also equipped with an electronic expansion valve 100.

[0110] In this way, when the air conditioning unit is put into use, this embodiment can drive the refrigerant sensor 10 to move cyclically along the guide rail mechanism 30 through the drive mechanism 20, thereby covering the refrigerant detection area around the air outlet 40, ensuring that refrigerant leakage around the air outlet 40 can be detected as early and accurately as possible, thereby improving the safety of the air conditioning unit and the user's experience.

[0111] like Figure 7 As shown, this embodiment proposes a sensor mounting structure with the following detection modes:

[0112] Firstly, the basic scanning mode: Upon startup, the drive mechanism 20 moves the refrigerant sensor 10 along the guide rail mechanism 30 at a constant speed V1m / s, covering the entire detection area. This mode is suitable for routine inspections or low-risk scenarios. If an abnormal refrigerant concentration is detected in this mode, the system will switch to a focused monitoring mode.

[0113] Key monitoring mode: If an abnormal refrigerant concentration is detected, the drive mechanism 20 will cause the refrigerant sensor 10 to decelerate and pause in the suspected leak area for re-inspection, reducing the speed to V3m / s and extending the sampling time. Based on historical leak data, high-risk areas (such as pipe connections and near valves) will be scanned first. If the refrigerant concentration exceeds the threshold C in N samples taken within the predetermined time... max The refrigerant sensor 10 will then identify the area as a refrigerant leak zone. The drive mechanism 20 will then move the refrigerant sensor 10 to stop in the refrigerant leak zone, and the refrigerant sensor 10 will simultaneously send a refrigerant leak alarm to the main control unit 50. The main control unit 50 will then report this to the backend, and the backend personnel will promptly dispatch maintenance personnel for repairs. Of course, if the refrigerant concentration sampled N times within the predetermined time does not exceed the threshold C... max If the main control unit 50 determines that it is a false detection, the drive mechanism 20 will drive the refrigerant sensor 10 to continue moving at the original speed V1m / s.

[0114] Third, energy-saving mode: When the equipment with the sensor mounting structure is not started, the drive mechanism 20 can be set to drive the refrigerant sensor 10 to run at a speed of V2m / s; when the equipment is started, the speed is adjusted to V1m / s.

[0115] like Figure 8 As shown, the specific detection logic is as follows:

[0116] When the air conditioning unit is running normally, the refrigerant sensor 10 moves at a speed of V1 and detects a refrigerant concentration of C1; when the air conditioning unit is turned off, the refrigerant sensor 10 moves at a speed of V2 and detects a refrigerant concentration of C2.

[0117] If the refrigerant sensor 10 detects that the refrigerant concentration exceeds the threshold C max Then the control drive mechanism 20 drives the refrigerant sensor 10 back to the over-threshold C. max The area was re-inspected (this area is a suspected leak area), and at this time the speed of refrigerant sensor 10 was V3;

[0118] Retesting is conducted in the suspected leak area. If the refrigerant concentration in N samples taken within the predetermined time exceeds the threshold C... maxThe refrigerant sensor 10 will determine that the area is a refrigerant leak zone, and the drive mechanism 20 will move the refrigerant sensor 10 to stay in the refrigerant leak zone. At the same time, the refrigerant sensor 10 will send a refrigerant leak alarm to the main control unit 50 so that the main control unit 50 can report it to the background. After the background personnel are informed, they will promptly send maintenance personnel to carry out maintenance.

[0119] If the refrigerant concentration in N samples taken within the predetermined time does not exceed the threshold C max If the main control unit 50 determines that it is a false detection, the drive mechanism 20 will drive the refrigerant sensor 10 to continue moving at the original speed.

[0120] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A sensor mounting structure characterized by comprising: include: A refrigerant sensor (10) is used to detect whether a refrigerant leak has occurred; A drive mechanism (20) is equipped with a refrigerant sensor (10); The guide rail mechanism (30) has its contact surface slidably connected to the output end of the drive mechanism (20); the guide rail mechanism (30) extends circumferentially along the air outlet (40), and its cross-section is a closed ring. The drive mechanism (20) is used to drive the refrigerant sensor (10) to move cyclically along the guide rail mechanism (30).

2. The sensor mounting structure according to claim 1, characterized by The drive mechanism (20) includes a first drive unit (201), a transmission shaft (202), and a rolling element (203); The guide rail mechanism (30) has two contact surfaces arranged symmetrically along its length, each having a first groove (301). Each first groove (301) is matched with a rolling element (203) to form a rolling pair. The rolling elements (203) are all connected to the output shaft of the first drive unit (201) through the transmission shaft (202). Furthermore, a refrigerant sensor (10) is installed on the housing of the first drive unit (201).

3. The sensor mounting structure according to claim 2, characterized in that, Each of the rolling elements (203) is connected to the two output shafts of the dual-output reducer (204) via a drive shaft (202), and the input shaft of the dual-output reducer (204) is connected to the output shaft of the first drive unit (201).

4. The sensor mounting structure according to claim 2, characterized in that, Each of the rolling elements (203) is connected to the output shaft of one of the first drive units (201) via a drive shaft (202). At least one of the first drive units (201) is provided with an encoder unit (205) containing a speed detection module and a closed-loop control unit (206). The closed-loop control unit (206) is communicatively connected to the encoder unit (205) and is used to control all the first drive units (201) to rotate synchronously.

5. The sensor mounting structure according to claim 1, characterized in that, The drive mechanism (20) includes a second drive unit (207), a reduction gear set (208), and a rack; The guide rail mechanism (30) has a closed ring-shaped second slide groove (302) along its length direction. A rack is coaxially arranged on the bottom wall of the second slide groove (302). The rack meshes with the output gear of the reduction gear set (208). The input shaft of the reduction gear set (208) is connected to the output shaft of the second drive unit (207). The housing of the reduction gear set (208) is connected to the housing of the second drive unit (207), and the housing of the second drive unit (207) is fitted with a refrigerant sensor (10). The housing of the reduction gear set (208) forms a sliding pair by matching the slider with the second slide groove (302).

6. The sensor mounting structure according to claim 5, characterized in that, The drive mechanism (20) also includes a coupling; The input shaft of the reduction gear set (208) is connected to the output shaft of the second drive unit (207) via the coupling.

7. The sensor mounting structure according to any one of claims 1 to 6, characterized in that, A heating mechanism (60) is provided around the probe of the refrigerant sensor (10) to prevent the probe of the refrigerant sensor (10) from freezing.

8. The sensor mounting structure according to any one of claims 1 to 6, characterized in that, A honeycomb rectifier is coaxially sleeved on the outer periphery of the probe of the refrigerant sensor (10), and an annular airflow channel is formed between the honeycomb rectifier and the probe surface of the refrigerant sensor (10); the honeycomb rectifier is used to laminate the airflow passing through the probe.

9. The sensor mounting structure according to any one of claims 1 to 6, characterized in that, The refrigerant sensor (10) has inclined guide vanes spaced apart on its windward side. The projected area of ​​the inclined guide vanes in the airflow direction is greater than the maximum projected area of ​​the refrigerant sensor (10) in the same airflow direction.

10. An air conditioning unit, characterized in that, The air outlet (40) of the air conditioning unit is fitted with a sensor mounting structure as described in any one of claims 1 to 9.

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