阅读说明：本技术 传感器、换热器和换热系统 (Sensor, heat exchanger and heat exchange system ) 是由 万霞 谭永翔 逯新凯 谢禧忠 牛玉娇 饶欢欢 黄隆重 黄宁杰 于 2019-08-29 设计创作，主要内容包括：本申请公开的传感器包括壳体、电路板及设置于电路板的传感芯片,所述壳体内设有容纳腔,所述壳体包括顶壁、底壁和侧壁,所述传感器设有供液态水排出的排水部,所述排水部包括贯穿设置于所述底壁或所述侧壁的第三通道,当所述传感器用于换热器中并监测换热器外表面附近处的温度和/或湿度时其监测精度可相对提高。(The utility model discloses a sensor includes casing, circuit board and sets up in the sensor chip of circuit board, be equipped with in the casing and hold the chamber, the casing includes roof, diapire and lateral wall, the sensor is equipped with and supplies liquid water exhaust drainage portion, drainage portion including run through set up in the diapire or the third passageway of lateral wall works as but its monitoring precision relatively improves when the sensor is arranged in the heat exchanger and monitors temperature and/or humidity near the heat exchanger surface.)

1. A sensor is characterized by comprising a shell, a circuit board and at least one sensing chip arranged on the circuit board, wherein the shell comprises a top wall, a bottom wall and a side wall, an accommodating cavity is formed in the shell, the top wall and the bottom wall are positioned at two ends of the accommodating cavity in the height direction, the side wall is arranged on the periphery of the accommodating cavity, and the side wall is connected with the top wall and the bottom wall; the circuit board is connected with the side wall or the top wall;

the sensor is provided with a first channel, the first channel can be used for air to enter and exit, and the first channel penetrates through the side wall or the top wall;

the sensor is provided with a second channel, the second channel can be used for a lead to enter and exit, the second channel penetrates through the side wall or the top wall, and the second channel and the first channel are arranged at different positions of the shell;

the sensor is provided with a drainage part for discharging liquid water, and the drainage part comprises a third channel which penetrates through the bottom wall or the side wall.

2. The sensor of claim 1, wherein the third channel is one or more of a through hole, a slit, or a notch.

3. A sensor according to claim 1 or claim 2, wherein the base wall is of generally flat configuration, one or more of said third passages being provided therethrough;

or, the bottom wall comprises an inclined wall, a first end of the inclined wall is at least partially connected with the bottom wall, a second end of the inclined wall is a terminal end extending from the first end in a direction away from the top wall, and the terminal end of the inclined wall is provided with the third channel;

or, the bottom wall includes an inclined wall, a first end of the inclined wall is at least partially connected with the bottom wall, a second end of the inclined wall is a tail end extending from the first end toward a direction close to the top wall, and the third channel is arranged near a connection position of the first end of the inclined wall and the bottom wall.

4. The sensor according to claim 3, wherein the bottom wall is funnel-shaped, the bottom wall is an inclined wall, a first end of the inclined wall is connected with a lower end of the side wall, a second end of the inclined wall is a terminal end extending from the first end in a direction away from the top wall, the third channel is arranged near the second end of the inclined wall, and the third channel is the through hole;

or, the bottom wall is an inclined wall, at least part of the first end of the inclined wall is connected with the lower end of the side wall, the second end of the inclined wall is a tail end extending from the first end towards the direction close to the top wall, the joint of the first end of the inclined wall and the bottom wall comprises the first end of the inclined wall and the lower end of the side wall, and the third channel is arranged at the first end of the inclined wall and/or at least part of the lower end of the side wall.

5. A sensor according to any one of claims 1 to 4, wherein at least part of the inner surface of the housing is coated with a hydrophilic or hydrophobic coating.

6. The sensor of claim 5, wherein the housing portion of the sensor is made of metal; and/or the circuit board body is made of ceramic materials.

7. The sensor of claim 6, wherein a thermally conductive adhesive is disposed between the circuit board and the top wall or the side wall, the thermally conductive adhesive comprising a polymeric material and a thermally conductive material.

8. The sensor of claim 6, wherein the circuit board is provided with at least one sensing chip, and at least one sensing chip is a temperature sensing chip and/or a humidity sensing chip.

9. A heat exchanger, characterized in that the heat exchanger comprises the sensor according to claims 1-8, the heat exchanger is a multi-channel heat exchanger or a tube fin heat exchanger, and the sensor is arranged on the outer surface of the heat exchanger and is in contact with at least part of the outer surface of the heat exchanger.

10. A heat exchange system is characterized by comprising a compressor, at least one first heat exchanger, a throttling device and at least one second heat exchanger, wherein the first heat exchanger and/or the second heat exchanger are/is the heat exchangers according to claim 9, when a refrigerant flows in the heat exchange system, the refrigerant flows into the first heat exchanger through the compressor, flows into the throttling device after the heat exchange of the first heat exchanger, and then flows into the second heat exchanger and flows into the compressor again after the heat exchange of the second heat exchanger.

Technical Field

The application relates to the field of sensors, in particular to a sensor, a heat exchanger and a heat exchange system.

Background

In the related art, a sensor for a heat exchange system such as an air conditioner mainly monitors the temperature and/or humidity of the environment. The sensors of the related art are in need of improvement if the humidity of the heat exchanger surface is more precisely monitored.

Disclosure of Invention

According to one aspect of the application, a sensor is provided, the sensor includes a housing, a circuit board and a sensing chip disposed on the circuit board, a receiving cavity is disposed in the housing, the housing includes a top wall, a bottom wall and a side wall, the top wall and the bottom wall are located at two ends of the sensor in a height direction, the side wall is connected to the top wall and the bottom wall, the circuit board is connected to the side wall, or the circuit board is connected to the top wall, the sensor is provided with a first channel, the first channel can allow air to enter and exit, and the first channel penetrates through the side wall or the top wall; the sensor is provided with a second channel, the second channel can be used for a lead to enter and exit, the second channel penetrates through the side wall or the top wall, and the second channel and the first channel are arranged in a staggered mode; the sensor is equipped with and supplies liquid water exhaust's drainage department, drainage department including run through set up in diapire or the third passageway of lateral wall, because the setting of drainage department can with the comdenstion water in the sensor is discharged, works as the sensor is used for monitoring can improve its monitoring precision when the humidity of heat exchanger outer wall face near.

According to another aspect of the application, a heat exchanger is provided, the heat exchanger comprises the sensor, the heat exchanger is a multi-channel heat exchanger or a tube-fin heat exchanger, the sensor is arranged on the outer surface of the heat exchanger and is in contact with at least part of the outer surface of the heat exchanger, and therefore monitoring of the temperature and/or humidity of the heat exchanger is facilitated.

According to another aspect of the application, a heat exchange system is provided, the heat exchange system is provided with a compressor, at least one first heat exchanger, a throttling device and at least one second heat exchanger, the first heat exchanger and/or the second heat exchanger are/is the heat exchangers, when a refrigerant flows in the heat exchange system, the refrigerant flows into the first heat exchanger through the compressor, flows into the throttling device after the heat exchange of the first heat exchanger, then flows into the second heat exchanger, and flows into the compressor again after the heat exchange of the second heat exchanger, and the heat exchange system can better monitor the temperature and/or humidity parameters near the outer surface of the heat exchanger when the system runs so as to enable the system to adopt further operation.

Drawings

Fig. 1 is a schematic structural diagram of a sensor according to an embodiment of the present application.

Fig. 2 is a schematic diagram of an exploded structure of a sensor according to an embodiment of the present application in fig. 1.

Fig. 3 is a schematic top view of the embodiment of the present application of fig. 2.

Fig. 4 is a schematic cross-sectional view of the sensor of the embodiment of fig. 3 along the direction a-a.

Fig. 5 is a schematic structural diagram of a sensor housing according to another embodiment of the present application.

Fig. 6 is a schematic diagram of an exploded view of another embodiment of the sensor of fig. 5.

Fig. 7 is a schematic top view of the embodiment of the present application of fig. 6.

FIG. 8 is a schematic cross-sectional view of the sensor housing of FIG. 7 taken along the direction B-B in accordance with another embodiment.

Fig. 9 is a schematic structural diagram of a heat exchanger provided with a sensor according to an embodiment of the present application.

FIG. 10 is a schematic view of an exemplary heat exchange system of the present application.

Reference numerals:

the sensors 10, 20;

a heat exchanger 100;

heat exchange tubes 20, 21, 22; heat exchange tube first ends 211, 212; second ends 212, 221;

a fin 30; a crest portion 31; a wave trough portion 32; a side wall 33;

a heat exchange system 1000; a compressor 1; a first sensor 2; a throttle device 3; a second sensor 4; and a reversing device 5.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature. Exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. The features of the following examples and embodiments can be supplemented or combined with each other without conflict.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

Exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. The features of the following examples and embodiments may be combined with each other without conflict.

In the related art, particularly in heat pump air conditioning systems, sensors are used to measure temperature or humidity. The sensor in the related art is used only to detect the ambient temperature. The inventor considers that the sensors in the related art have poor precision when used for measuring humidity, even some sensors clearly indicate that the sensors cannot be used for measuring humidity, because when the humidity is too high, condensed water may be generated and cannot be discharged in time, so that the test result is inaccurate, and electronic components are damaged seriously, and the sensors are damaged. However, in some conditions, monitoring only ambient temperature or humidity is inaccurate. For example, in winter heating, the temperature of the outdoor sensor is always lower than the ambient air temperature, and when the temperature is lower than the dew point temperature of the ambient air, condensed water is generated on the surface of the fins of the sensor. When the temperature of the sensor is further lower than 0 ℃, the condensed water is converted into frost to be attached to the surface of the fin. When the frosting is serious, the local air channel between the fins is occupied by the frosting, so that the heat exchange coefficient of the sensor is reduced, and the air channel between the fins is blocked, so that the air quantity is reduced, and the heat exchange efficiency and the air side pressure drop of the heat pump system sensor are directly influenced. Therefore, when the heat pump air-conditioning system heats in winter, the surface of the heat exchanger is likely to be frosted, and the precision of monitoring frosting needs to be improved, so that the measures for avoiding frosting are favorably taken in advance to keep the heat exchange efficiency of the heat pump air-conditioning system.

According to the Regnault principle, a volume of humid air is uniformly cooled at a constant total pressure until the moisture in the air reaches a saturation state, which is called the dew point. In other words, if a clean metal surface is exposed to air having a relative humidity of less than 100% and allowed to cool, when the temperature drops to a certain value, the relative humidity near the surface reaches 100%, and dew (or frost) forms on the surface. The sensors used in the heat exchanger in the related art detect the temperature and humidity in the environment, and cannot accurately reflect the surface temperature and humidity of the heat exchanger. In fact, the surface temperature of the heat exchanger is lower than the ambient temperature, and the humidity is higher than the ambient humidity, and when the humidity sensor detects that the humidity is close to 100%, the surface of the heat exchanger is frosted.

The sensor of the embodiment of the application analyzes the frosting critical point by detecting the temperature and the relative humidity of the surface of the heat exchanger and adopting the Regnault principle, monitors the frosting point and feeds back the frosting point to the system for further processing by the system. Specifically, the sensor of the embodiment of the application adopts the metal shell with good thermal conductivity, the ceramic circuit board plate such as aluminum nitride and the like and the heat-conducting sealant, so that the temperature of the shell and the ceramic circuit board plate is close to the temperature of the surface of the sensor, and the humidity sensor on the circuit board plate can accurately detect the relative humidity and the temperature of the surface of the sensor. When the sensor surface humidity (RH) approaches 100% and the sensor surface temperature T <0 ℃, it indicates that the sensor surface is about to frost. And the frosting on the surface of the sensor is delayed and prevented by sending the frosting information and controlling.

The embodiment of the application provides a sensor capable of relatively improving humidity monitoring accuracy. The sensor can be used with the heat exchanger to improve the accuracy of humidity monitoring on or near the surface of the heat exchanger. When the heat exchanger is matched with the sensor and then used in the operation of a heat exchange system, the accuracy of monitoring frosting or fogging on the surface of the sensor can be relatively improved. It will be readily appreciated that the present sensor may be used in applications where temperature and/or humidity monitoring is required, in addition to heat exchanger and heat pump systems. And are not limited herein.

An embodiment of the sensor 10 of the present application is illustrated in fig. 1 and 2, with reference to the other figures as necessary. Fig. 1 is a schematic structural diagram of a sensor 10 according to an embodiment of the present application. Fig. 2 is a schematic diagram of an exploded view of the sensor 10 of fig. 1 according to an embodiment of the present application.

As shown in fig. 1, the sensor 10 includes a housing 11, a housing cavity 110 is provided in the housing 11, the housing 11 includes a bottom wall 111, a top wall 112 and a side wall 113, the top wall 112 and the bottom wall 111 are located at two ends of the sensor in the height direction (X direction in the figure), the side wall 113 connects the top wall 112 and the bottom wall 111, the housing cavity 110 is formed by enclosing the top wall 112, the bottom wall 111 and the side wall 113, in other words, the top wall 112 and the bottom wall 111 are provided at two ends of the housing cavity 110 in the height direction, the side wall 113 is provided at the peripheral side of the housing cavity 110, and the side wall 113 is connected to the top wall 112 and the bottom wall 111. It should be noted that the sensor 10 in the embodiment of fig. 1 is substantially rectangular, the bottom wall 111 and the top wall 112 are substantially square, and in some other embodiments, the structure of the sensor 10 may also be a square, a cylinder, etc., and the sensor is disposed as needed, which is not limited herein.

As shown in fig. 2, the sensor 10 includes a circuit board 12, the circuit board 12 is provided with a humidity sensing chip 121, and the circuit board 12 is directly or indirectly connected to the top wall 112. It should be noted that the direct connection here may be that the circuit board 112 and the top wall 112 are connected by soldering or the like, and the indirect connection may be that the circuit board and the top wall 112 are bonded by a heat conductive adhesive 13. In other embodiments, the circuit board 12 is directly or indirectly connected to the side wall 113. The circuit board 12 may be a Printed Circuit Board (PCB), and the material of the board body is a ceramic material. Optionally, the ceramic material is one or a mixture of aluminum nitride and aluminum oxide.

The heat conducting glue 13 comprises a polymer bonding material and a heat conducting material, and the polymer bonding material is filled with the heat conducting material. Optionally, the heat conductive material includes one or more of aluminum nitride, boron nitride, aluminum oxide, magnesium oxide, and silicon oxide. The heat conducting glue 13 has a strong heat conducting property, or the heat resistance of the heat conducting glue 13 is small, so that when the sensor 10 is used for testing the temperature of the surface of the heat exchanger, the temperature of the surface of the heat exchanger can be closer to the temperature of the sensor, and the sensor can more accurately measure the real-time temperature of the surface of the heat exchanger. The circuit board 12 of the sensor 10 in this embodiment is connected to the top wall 112 through the thermal conductive paste 13. Of course, in this embodiment, the side wall 113 and the top wall 112 may also be connected by the thermal conductive adhesive 13 or directly welded.

At least part of the inner surface 114 of the housing 11 of the sensor 10 is coated with a coating 115, the coating 115 being a hydrophilic coating or a hydrophobic coating, the coating 115 facilitating drainage of condensation water inside the housing 11, in other words, condensation water does not condense on the coated area, or the condensation water does not form a wall built up inside the sensor, thereby affecting the accuracy of the sensor in measuring the humidity on the surface of the heat exchanger. As shown in fig. 1 or 2, the inner surface 114 of the side wall 113 of the housing 11 of the sensor 10 is entirely coated with the coating 115, and the inner surface of the bottom wall 111 is also coated with the coating 115. So configured, the inner surface 114 of the housing 11 of the sensor 10 facilitates the drainage of condensate, facilitating the measurement of humidity by the sensor 10 at or near the heat exchanger surface.

The sensor 10 is provided with a first channel 141, the first channel 141 can be used for air to enter and exit, and the first channel 141 is arranged through the side wall 113 or the top wall 112. As shown in fig. 1 or 2 in combination with fig. 3 and 4, the first channel 141 in this embodiment is disposed at the side wall 113, the first channel 141 is a through hole, and the diameter of the through hole is 0.1 μm to 1mm, so that the arrangement is favorable for air to enter and exit, and can prevent impurities such as dust from entering the accommodating cavity 110 of the sensor 10 to damage the sensor 10. Theoretically, the smaller the diameter of the through hole, the better, but due to process and cost limitations, the practical need may be met. In other embodiments, the diameter of the through hole is 100nm to 500 μm. In other embodiments, the first channel 141 may have other shapes as well, as long as the requirement can be achieved, and the shape is not limited. The number of the first channels 141 may be one or more than two, as long as the testing requirement is met, and is not limited herein.

The sensor 10 is provided with a second channel 142, and the second channel 142 is used for the entry and exit of a lead (not shown). Wherein the wires are used to connect the sensor 10 to other devices, through which the test data of the sensor 10 can be conducted to other data processing devices or data collection devices or other devices. The second channel 142 is disposed through the side wall 113 or the top wall 112, and the second channel 142 is disposed in a staggered manner with respect to the first channel 141, in other words, the second channel 142 and the first channel 141 are disposed at different positions of the housing 11.

As shown in fig. 1 or 2, the second channel 142 is disposed through the sidewall 113. There is only one second channel 142, and the second channel 142 and the first channel 141 are disposed at different positions of the sidewall 113. In other embodiments, there may be more than two second channels 142, which may be arranged as required. In other embodiments, the second channel 142 and the first channel 141 may coincide. The second channel 142 may be a through hole, to be noted, the aperture of the second channel 142 may be substantially adapted to the wire passing therethrough, so as to prevent dust and other foreign objects from entering the receiving cavity 110 of the sensor 10 and damaging the sensor 10. Optionally, the lead and the shell 11 are fixed together by using a sealing adhesive, so that the lead is prevented from being pulled by external force and falling off. To illustrate, in the sensor shown in fig. 1 to 8, a part of the wall 1420 of the second channel 142 is formed by a part of the sidewall 113 extending out of the accommodating cavity 110, and the wall 1420 can be used to fix the wire, so that the wire is firmly fixed and the wire is prevented from falling off to some extent. In other embodiments, wall 1420 may not be provided.

The sensor 10 is provided with a drain 15 for liquid water, and the drain 15 includes a third channel 151 provided through the bottom wall 111 or the side wall 113.

In some embodiments, the bottom wall 111 is substantially straight, and the drain portion 15 is disposed at a middle position of the bottom wall 111. The third channel 151 is a through hole, and the through hole is disposed through the bottom wall 111. In other embodiments, the third channel 151 may be a slit or notch. The third channels 151 can be provided in more than two ways, according to specific requirements.

As shown in fig. 1 or 2, the sensor 10 is further provided with a knife-stab part 16, and the knife-stab part 16 is disposed at the side wall 113 and is formed by extending from the side wall 113 to the outside of the housing. The bayonet portion 16 is provided with teeth 161, and the teeth 161 may facilitate the use of the sensor 10 with other devices, such as a microchannel heat exchanger, and the sensor may be inserted and used with fins of the microchannel heat exchanger through the teeth 161. Of course, the sensor 10 may not be provided with the bayonet 16, and may be directly fixed to a position where temperature or humidity is to be monitored, if necessary.

The exploded view of the sensor 10 as shown in fig. 2 includes the circuit board 12. The circuit board 12 is provided with a temperature sensing element 121, a humidity sensing element 122 and a filter capacitor 123. The temperature sensing element 121 can sense temperature, the humidity sensing element 122 can sense humidity, and the filter capacitor 123 can reduce interference in a temperature or humidity measuring process. In other embodiments, the circuit board 12 is provided with only the temperature sensing element 121 or the humidity sensing element 122, in other words, the temperature sensing element 121 or the humidity sensing element 122 can be provided separately or in combination, which is not limited herein. Optionally, the circuit board 12 is provided with at least one sensing chip, and at least one sensing chip can sense temperature and/or humidity. Optionally, the circuit board is provided with more than two sensor chips, and the more than two sensor chips can monitor temperature and/or humidity. Waterproof and/or dustproof film is pasted in the sensing area of the sensing chip, and the waterproof and dustproof film can prevent dust and water, so that the measuring precision of the sensor is high, and the service life of the sensor can be prolonged relatively. Wherein, IP67 can be selected as the waterproof and dustproof film. Optionally, the circuit board is provided with a filter capacitor, and the filter capacitor can reduce the noise of monitoring, so that the monitoring data is more accurate. Optionally, the filter capacitor has a plurality of capacitors.

Fig. 3 is a schematic top view of the sensor 10 of fig. 2 according to an embodiment of the present application. Fig. 4 is a schematic cross-sectional view of the sensor 10 of the embodiment of fig. 3 along the direction a-a. As shown in fig. 4 and 3, the sensor 10 has the housing 11, and the housing 11 has the inner cavity 110, the bottom wall 111, the top wall 112, and the side wall 113. The first and second passages 141 and 142 are disposed through the sidewall 113. The sensor 10 further has a spine portion 16, the spine portion 16 is disposed on the side wall 113, the spine portion 16 has a plurality of teeth 161, and the plurality of teeth 161 are arranged along an extending direction of the spine portion 16. The sensor 10 further includes the circuit board 12, the circuit board 12 is fixed to the top wall 112 through the thermal conductive adhesive 13, the circuit board 12 is provided with the humidity sensing element 122, the temperature sensing element 121 and the filter capacitor 123, and sensing openings of the humidity sensing element 122 and the temperature sensing element 121 face the inner cavity portion 110. When the sensor 10 is used in practice, the sensing openings of the humidity sensing element 122 and the temperature sensing element 121 may be arranged downward, which is not conducive to adhering dust and the like to the sensing area and further affecting the accuracy of the sensing element, and is also conducive to discharging condensed water under the action of gravity, thereby improving the testing accuracy and prolonging the service life of the sensing element and the sensor to a certain extent. In other embodiments, the circuit board 12 may be disposed on the sidewall 113, and the sensing opening may not be completely downward, as long as the requirement is satisfied.

It should be noted that the bottom wall 111 includes a drain portion 15, the drain portion 15 has a third channel 151, and as shown in fig. 4, the drain portion 15 is disposed on the bottom wall 111. In particular, all or part of said bottom wall 111 forms an inclined wall 101. As shown in fig. 4, the bottom walls are all sloped walls. The first end 1011 of the inclined wall 101 is connected to the first end 1131 of the side wall 113, the second end 1012 of the inclined wall 101 is a terminal end extending from the first end 1011 in a direction away from the top wall 112, and the third channel 151 is provided near the terminal end 1012 of the inclined wall 101. In other words, the second end 1012 of the inclined wall 101 encloses the third passage 151, in other words, the bottom wall 111 is the drain 15 as a whole. Alternatively, the bottom wall 111 is substantially funnel-shaped, i.e. the drain 15 is funnel-shaped. So configured, it facilitates the drainage of condensate water from the sensor 10.

Optionally, at least a portion of the bottom wall 111 forms an inclined wall 101, a first end 1011 of the inclined wall 101 is joined to the straight section of the bottom wall 111, a second end 1012 of the inclined wall 101 is a terminal end extending from the first end 1011 in a direction away from the top wall 112, and the terminal end 1012 of the inclined wall 101 has the third channel 151. In other words, the second end 1012 of the inclined wall 101 encloses the third passage 151, and the bottom wall 111 partially forms the drain 15. Alternatively, the drain portion 15 is substantially funnel-shaped. Optionally, the drainage channel 151 of the drainage portion 15 is a gap or a notch, and the gap or the notch is disposed through the bottom wall.

Fig. 5 is a schematic structural diagram of a housing of a sensor 20 according to another embodiment of the present application. Fig. 6 is an exploded view of the sensor of the embodiment of fig. 5. Fig. 7 is a schematic top view of the housing of another embodiment of the sensor 20 of fig. 6 or 5. Fig. 8 is a schematic cross-sectional view of the sensor 20 of fig. 7 taken along the direction B-B. As shown in fig. 5 to 8, the sensor 20 and the sensor 10 have the same structure, and are not described again. Except that the bottom wall 111 of the sensor 30 includes a drain 15, the drain 15 having a third channel 151, the drain 15 being disposed proximate the junction of the bottom wall 111 and the first end 1131 of the side wall 113. Specifically, the bottom wall 111 includes an inclined wall 101, a first end 1011 of the inclined wall 101 is connected to the lower end 1131 of the side wall 113, and the inclined wall 101 extends from the first end 1011 toward the top wall 112. The third channel 151 is provided near the junction of the first end 1011 of the inclined wall and the bottom wall 113. In other words, the bottom wall 111 is concave as a whole and is close to the top wall 112. The vicinity of the connection between the first end 1011 of the inclined wall and the side wall 113 comprises the first end 1011 of the inclined wall and the first end 1131 of the side wall 113, and at least a part of the first end 1011 of the inclined wall and/or the first end 1131 of the side wall is provided with the third channel 151. So configured, it facilitates the drainage of condensate water from the sensor 10.

Fig. 9 is a schematic structural diagram of a heat exchanger 100 provided with a sensor 10 according to an embodiment of the present application. The heat exchanger 100 is a multi-pass heat exchanger. In other embodiments, the heat exchanger may also be a tube and fin heat exchanger or other heat exchangers that need to monitor temperature or humidity, and the like, which is not limited herein. The heat exchanger 100 according to an embodiment of the present disclosure may include a header 40, a plurality of heat exchange tubes 20, and fins 30. The header 40 has an inner cavity (not shown) for flowing a refrigerant, and is shaped like a circular tube. The length direction is the axial direction. The header 40 has two headers, namely a first header 41 and a second header 42, and the first header 41 and the second header 42 are arranged substantially in parallel. To illustrate, the heat exchanger 100 and air generally undergo only one heat exchange, commonly referred to in the art as a single layer sensor. Of course, in other embodiments, the collecting pipe 40 may also be a D-shaped or square pipe, and the specific shape thereof is not limited as long as the burst pressure thereof meets the system requirement. The relative position of the collecting pipe 40 is not limited, and the actual installation requirement can be met. The number of the collecting pipes 40 may be only one, as long as the heat exchange requirement is met, and the number is not limited herein. The header 40 in the embodiment of the present application is exemplified by a circular pipe.

The heat exchange tubes 20 are provided with a plurality of heat exchange tubes 20, each heat exchange tube 20 has a length direction, a width direction and a height direction, and the plurality of heat exchange tubes 20 are arranged along the axial direction of the collecting pipe 10 and are arranged approximately in parallel. The plurality of heat exchange tubes 20 each have a first end and a second end. As shown in fig. 7, the heat exchange pipe 20 includes a first heat exchange pipe 21 and a second heat exchange pipe 22 arranged in parallel. The first heat exchange tube 21 has a first end 211 and a second end 212, and the direction of the first end 211 extending to the second end 212 of the heat exchange tube 21 is the length direction (X direction in the figure) of the heat exchange tube. The heat exchange tube 21 has a first ceiling wall 213 and a first bottom wall 214 at both ends in the thickness direction (Z direction in the drawing), the first ceiling wall 213 and the first bottom wall 214 being arranged substantially in parallel, wherein the height direction of the heat exchange tube 20 may also be referred to as the thickness direction of the heat exchange tube.

The first end 211 of the first heat exchange tube 21 is connected to the first collecting pipe 11, the second end 212 of the first heat exchange tube 21 is connected to the second collecting pipe 12, similarly, the first end 221 of the second heat exchange tube 22 is connected to the first collecting pipe 11, and the second end 222 of the second heat exchange tube 22 is connected to the second collecting pipe 12. The first heat exchange pipe 21 and the second heat exchange pipe 22 are arranged substantially in parallel. The heat exchange tube 20 has an inner cavity (not shown) for flowing a refrigerant, and is connected in such a way that the inner cavity of the heat exchange tube 20 is communicated with the inner cavity of the header 40 to form a refrigerant circulation channel (not shown) of the heat exchanger 100, and the refrigerant can circulate in the heat exchange channel and realize heat exchange through the heat exchanger 100.

It should be noted that the heat exchange tube 20, also referred to as a flat tube in the industry, has an inner cavity for flowing a refrigerant therein.

The first header 41 and the second header 42 each have a tube wall 401, a heat exchange tube insertion hole 402, and an inner cavity (not numbered in the figure), and the axial direction of the first header 41 and the axial direction of the second header 42 are defined as the length direction of the header 10 (i.e., the Z direction in the figure).

The distribution structure in the embodiment of the invention is not limited to be used for a single-layer heat exchanger, and can also be used in other multi-layer heat exchangers, the multi-layer heat exchanger can be a heat exchanger with bent heat exchange tubes, or a heat exchanger with adjacent collecting pipes connected through a connecting module, and the structure is substantially the same, and is not described herein again. It should be noted that, when the multi-layer heat exchanger is a heat exchanger with bent heat exchange tubes, the length direction of the heat exchange tubes is the extending direction of the heat exchange tubes, in other words, the length direction is not limited to be a straight direction.

The heat exchanger 100 of the embodiment of the present application includes the fin 30. It should be noted that, in the related art, the surface of the sensor is coated with a functional material, such as a corrosion-resistant material, and specifically, the functional material is coated on all or part of the outer surface of the whole heat exchanger, and the functional material may be a corrosion-resistant material or a moisture-absorbing material, and may be arranged as needed, which is not described herein again. The fin 30 is a window fin and has crest and trough portions. Illustratively, in other embodiments, the fins may be non-windowed fins. The shape of the fin can be approximately wave shape or section bar, the section of the fin can be sine wave or approximate sine wave, or sawtooth wave, as long as the requirement is met, and the specific structure is not limited. Of course, the fins 30 may be coated with a functional material as needed, and are not limited thereto.

The fin 30 in the present embodiment is a corrugated fin, and the fin 30 has crest portions 31, trough portions 32, and side wall portions 33 connecting the crest portions 31 and the trough portions 32. The crest portions 31 and the furrow portions 32 are provided at intervals in the longitudinal direction of the fin 30, and the side wall portion 33 has a plurality of ones. In this regard, the plurality described in the present invention means two and more than two unless otherwise specified. The side wall 33 may be provided with a window or not, and may be provided according to the heat exchange requirement.

The fins 30 are arranged between two adjacent heat exchange tubes 20, the crest portions 31 are at least partially in contact with the first heat exchange tube 21, and the trough portions 32 are at least partially in contact with the second heat exchange tube 22. The extending direction in which the crest portions 31 and the trough portions 32 defining the fin 30 are arranged at intervals one by one is the length direction (X direction in the drawing) of the fin 30. As can be seen, the length direction of the fin 30 is the same as the length direction of the heat exchange tube 20 (X direction in the figure), and the distance between the heat exchange tubes 20 is the height direction of the fin 30 (Z direction in the figure). The bayonet 16 of the sensor 10 is engaged with the fin 30. The outer wall surface of the sensor 10 is in direct contact with the outer surface of the heat exchanger 100, or the sensor 10 is directly welded to the outer surface of the heat exchanger 100. The arrangement is such that the sensor 10 can more accurately monitor the temperature and/or humidity near the outer surface of the heat exchanger 100.

As shown in fig. 10, a heat exchange system 1000 according to an exemplary embodiment of the present application is shown, where the heat exchange system 1000 at least includes a compressor 1, a first heat exchanger 2, a throttling device 3, a second heat exchanger 4, and a reversing device 5. Alternatively, the compressor 1 of the heat exchange system 1000 may be a horizontal compressor or a vertical compressor. Optionally, the throttling device 3 may be an expansion valve, and in addition, the throttling device 3 may also be other components having the functions of reducing pressure and adjusting flow rate to the refrigerant. It should be noted that in some systems, the reversing device 5 may not be present. The heat exchanger 100 described in the present invention can be used in the heat exchange system 1000 as the first heat exchanger 2 and/or the second heat exchanger 4. In the heat exchange system 1000, the compressor 1 compresses a refrigerant, the temperature of the compressed refrigerant rises, the refrigerant enters the first heat exchanger 2, heat is transferred to the outside through the heat exchange between the first heat exchanger 2 and the outside, the refrigerant passing through the throttling device 3 is changed into a liquid state or a gas-liquid two-phase state, the temperature of the refrigerant is reduced at the moment, the refrigerant with a lower temperature flows to the second heat exchanger 4, and the refrigerant enters the compressor 1 again after the heat exchange between the second heat exchanger 4 and the outside, so that the refrigerant circulation is realized. When the second heat exchanger 4 is used as an outdoor heat exchanger for heat exchange with air, the heat exchanger is arranged as needed with reference to the above-described working example.

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being covered by the following claims.