Junction box and compressor

Abstract

The utility model relates to a junction box and a compressor. The junction box comprises a shell and a hydrophobic layer. The shell is provided with an inner shell layer and an outer shell layer, the inner shell layer and the outer shell layer are spaced to form a refrigerant cavity, and the shell is further provided with a refrigerant injection port and a refrigerant discharge port which are communicated with the refrigerant cavity. The hydrophobic layer covers the inner surface of the inner shell layer. According to the junction box, the refrigerant can be introduced into the refrigerant cavity to reduce the temperature of the inner surface of the junction box, and water vapor in air in the junction box is easily condensed on the inner surface of the junction box, namely condensation is formed on the inner surface of the inner shell layer, so that the effect of reducing air humidity is achieved, and condensation is not easily generated at the junction position. And on the other hand, the inner surface of the inner shell layer is provided with the hydrophobic layer, so that the condensation easily flows to the bottom of the junction box along the inner surface of the inner shell layer under the action of gravity, and the possibility that the condensation drops on the junction position is reduced. Thus, the junction box can dehumidify air in the junction box, condensation at the junction position is reduced fundamentally, and later maintenance is simpler.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment, and in particular to a junction box and a compressor. Background Art

[0002] Condensation is the enemy of electrical equipment. It will not only sharply reduce the insulation of the equipment and cause failures, but in the long run, moisture will also invade the insulation components and accelerate insulation aging. At present, for commercial air-conditioning units, when the compressor terminal box is running, the temperature inside the terminal box rises sharply due to excessive current on the terminal post. A large amount of condensation droplets are easily formed at the wiring inside the terminal box, which seriously affects the service life of the terminal box and the electrical safety of the unit. Therefore, anti-condensation measures for the terminal box are extremely important.

[0003] In the related art, measures to address the condensation problem include spraying "three-proof" paint inside the junction box and adding desiccant inside the junction box. However, although spraying "three-proof" paint can improve the insulation performance of the motor, it cannot reduce the occurrence rate of condensation and does not fundamentally solve the condensation problem. Adding desiccant can solve the condensation problem in a short time, but it needs to be replaced regularly, and the maintenance is poor. Utility Model Content

[0004] Based on this, it is necessary to provide a junction box and a compressor that can reduce condensation at the wiring points and make subsequent maintenance easier in order to solve the above-mentioned problems.

[0005] A junction box comprises a shell and a hydrophobic layer, wherein the shell has an inner shell layer and an outer shell layer, the inner shell layer and the outer shell layer are separated to form a refrigerant cavity, and the shell further has a refrigerant injection port and a refrigerant discharge port connected to the refrigerant cavity; the hydrophobic layer is covered on the inner surface of the inner shell layer.

[0006] In one of the embodiments, the surface of the hydrophobic layer has water-conducting lines, and the water-conducting lines lead to the bottom of the shell.

[0007] In one of the embodiments, the shell further has a water storage cavity at the bottom thereof, and the water guiding pattern guides the water storage cavity.

[0008] In one of the embodiments, the junction box further includes a drainage assembly, which is disposed at the water storage chamber and is configured to drain water in the water storage chamber in a controlled manner.

[0009] In one embodiment, the drainage assembly includes a drainage mechanism and a liquid level component. The liquid level component is disposed in the water storage chamber and electrically connected to the drainage mechanism. The liquid level component is a liquid level detector or a liquid level switch.

[0010] In one embodiment, the hydrophobic layer is made of a super-hydrophobic material; and / or the hydrophobic layer is a hydrophobic coating.

[0011] In one embodiment, the junction box also includes a refrigerant circulation component, the refrigerant circulation component includes a flow controller and a refrigerant pipeline, the refrigerant pipeline connects the refrigerant injection port and the refrigerant discharge port, the flow controller is disposed on the refrigerant pipeline, and is configured to control the flow of the refrigerant pipeline.

[0012] In one embodiment, the junction box further includes a temperature sensor, which is disposed in the housing and electrically connected to the flow controller, and the temperature sensor is configured to detect the internal and external temperatures or the internal and external temperature difference of the junction box.

[0013] In one embodiment, the flow controller includes an electronic expansion valve and / or a solenoid valve.

[0014] A compressor comprises the above-mentioned junction box.

[0015] In one of the embodiments, the compressor further includes a compressor body, the junction box is disposed on the compressor body, and all structural surfaces of the junction box intersect with a horizontal plane.

[0016] In one embodiment, the compressor further includes a compressor body, and the refrigerant injection port of the junction box is connected to the compressor body.

[0017] The above-mentioned junction box and compressor can pass refrigerant into the refrigerant cavity to reduce the inner surface temperature of the junction box. When the outside air enters the junction box, its water vapor can easily condense on the inner surface of the junction box, that is, the inner surface of the inner shell to form condensation, thereby achieving the effect of reducing air humidity and ensuring the dryness of the air at the junction. On the other hand, since the inner surface of the inner shell has a hydrophobic layer, the condensation can easily flow to the bottom of the junction box along the inner surface of the inner shell under the action of gravity, thereby reducing the possibility of large amounts of condensation and dripping on the terminal posts, causing electrical safety hazards. In this way, the junction box can dehumidify the air inside it, fundamentally reducing condensation at the junction, and does not require the use of desiccant, a consumable that needs to be replaced regularly, making later maintenance simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of a partial cross-sectional structure of a compressor with a terminal box in one embodiment of the present application.

[0020] Figure 2 for Figure 1 An enlarged schematic diagram of the compressor at point A is shown.

[0021] Figure 3 for Figure 1 A schematic cross-sectional view of the housing in the junction box is shown.

[0022] Figure 4 for Figure 1 Schematic diagram of the structure of the refrigerant circulation component in the junction box shown.

[0023] Figure 5 for Figure 4 A schematic structural diagram of the refrigerant circulation component from another angle is shown.

[0024] Figure 6 for Figure 4 Another structural schematic diagram of the refrigerant circulation component shown.

[0025] Figure 7 This is a schematic diagram of the working process of the compressor of this application.

[0026] Explanation of the reference numerals: 100, junction box; 10, shell; 11, inner shell layer; 13, outer shell layer; 15, refrigerant chamber; 17, water storage chamber; 30, hydrophobic layer; 50, terminal; 70, refrigerant circulation assembly; 71, flow controller; 711, electronic expansion valve; 713, solenoid valve; 73, refrigerant pipeline; 731, inlet pipe; 733, intermediate pipe; 735, injection pipe; 200, compressor; 201, compressor body; 203, casing. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0028] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0029] In addition, if the term "and / or" appears, "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the objects associated before and after are in an "or" relationship. If the terms "first" and "second" appear, these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0031] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0033] The technical problems described in the background technology can also be solved by the following methods: 1. Add a dehumidification device for dehumidification, but this solution requires a large installation space and is costly. In addition, there is a problem that the humidity and temperature sensors inside the device are not reliable, resulting in limited dehumidification effect; 2. Add an insulation layer to the box cover to reduce the occurrence of condensation on the inner wall of the cover, but the condensation phenomenon at the wiring cannot be effectively solved; 3. Isolate the motor winding cavity and the junction box 100 with insulating materials to reduce the occurrence of condensation on the inner wall of the cover, but the cost is high, the process is complicated, the existing motor cannot be modified, and it is difficult to meet the reliability requirements of the junction box 100. Therefore, other solutions are necessary to overcome the above problems.

[0034] See also Figures 1 to 3 The junction box 100 provided in one embodiment of the present application includes a shell 10 and a hydrophobic layer 30. The shell 10 has an inner shell layer 11 and an outer shell layer 13, and the inner shell layer 11 and the outer shell layer 13 are separated to form a refrigerant cavity 15. The shell 10 also has a refrigerant injection port and a refrigerant discharge port (not shown) connected to the refrigerant cavity 15. The hydrophobic layer 30 is coated on the inner surface of the inner shell layer 11.

[0035] The terminal box 100 is used for the compressor 200. The compressor 200 may include a compressor body 201. The terminal box 100 is arranged on the compressor body 201. The compressor 200 having the terminal box 100 can be used in an air conditioning unit. It can be understood that in order to achieve its normal function, the terminal box 100 also has conventional structures such as terminal posts 50 for wiring, which will not be repeated here.

[0036] The shell 10 adopts a double-layer design, and a hollow interlayer as a refrigerant cavity 15 is provided between the inner shell layer 11 and the outer shell layer 13. Specifically, the shell 10 can form a hollow interlayer at each location. External refrigerant can be injected into the refrigerant cavity 15 through the refrigerant injection port to cool the shell 10, and then discharged from the refrigerant discharge port to form a cycle.

[0037] The hydrophobic layer 30 is disposed on the inner surface of the inner shell layer 11. In other words, the hydrophobic layer 30 forms the inner surface of the housing 10. The hydrophobic layer 30 is made of a hydrophobic material, which is a material with special surface properties. Its water contact angle is greater than 90°, showing obvious hydrophobicity. The liquid cannot wet the solid. The liquid has a tendency to shrink into a spherical shape on the surface of the hydrophobic layer 30 and is easy to flow on its surface. Among them, the hydrophobic material can be, but is not limited to, an organic-inorganic hybrid material, polytetrafluoroethylene, fluorinated polyethylene, fluorocarbon wax, polyolefin, etc., which are not specifically limited here.

[0038] The above-mentioned junction box 100 can be introduced into the refrigerant cavity 15 to reduce the inner surface temperature of the junction box 100. When the outside air enters the junction box 100, its water vapor can easily condense on the inner surface of the junction box 100, that is, the inner surface of the inner shell 11 forms condensation, thereby achieving the effect of reducing air humidity and ensuring the dryness of the air at the junction. On the other hand, since the inner surface of the inner shell 11 has a hydrophobic layer 30, the condensation can easily flow to the bottom of the junction box 100 along the inner surface of the inner shell 11 under the action of gravity, thereby reducing the possibility of a large amount of accumulation and dripping on the terminal 50, thereby causing electrical safety hazards. In this way, the junction box 100 can dehumidify the air inside it, fundamentally reduce condensation at the junction, and does not need to use a desiccant that needs to be replaced regularly, so that the later maintenance is simpler. In addition, the junction box 100 occupies a small space, has low cost, a simple structure and high reliability, and at the same time, does not need to modify the motor.

[0039] Furthermore, the hydrophobic layer 30 is made of a super hydrophobic material.

[0040] Super hydrophobic materials have excellent hydrophobicity. When the contact angle between the hydrophobic layer 30 made of the material and water is greater than 150°, the surface has a "super hydrophobic" property. In layman's terms, we can think that this solid surface has a strong ability to repel water.

[0041] The minimum diameter of a water droplet is 1000-2000 microns. When water drops fall on a lotus leaf on a rainy day, they often gather to form a sphere. This is because the surface of the lotus leaf is covered with many tiny papillae of about 6-8 microns, and only a nanometer-thick air layer will fill the concave parts between the "hills" of large and small papillae. In fact, when water drops fall on the interface of the numerous nanopores on the lotus leaf, a layer of air film will be formed, preventing water from invading. Once the drops fall, they will "suspend" and roll off without sticking to the leaf surface. This is also called the air flotation function of the nanopores.

[0042] Specifically, the super-hydrophobic material adopts lotus leaf bionic technology. It is composed of numerous tiny closely spaced columnar structures. It also has the same flotation function as lotus leaves. When water droplets condense on its surface, a large number of nano-scale raised structures can increase the surface area, allowing the water droplets to suspend on its surface and slide down the surface.

[0043] In this way, after the hydrophobic layer 30 made of this material is used to form the surface of the shell 10, when the junction box 100 forms a large temperature difference between the inside and the outside under the action of the refrigerant in the refrigerant cavity 15 of the shell 10, condensation droplets will float on the surface of the hydrophobic layer 30 and slide along the shell 10 after being generated, thereby effectively avoiding the electrical safety hazard caused by condensation gathering to form large droplets and dripping on the terminal 50.

[0044] Furthermore, the hydrophobic layer 30 is a hydrophobic coating. In other words, the hydrophobic layer 30 is formed by coating a hydrophobic coating on the inner surface of the inner shell layer 11. In this way, the hydrophobic layer 30 is formed in a simple, stable and conformable manner.

[0045] In some embodiments, the surface of the hydrophobic layer 30 has water-conducting lines (not shown), and the water-conducting lines lead to the bottom of the housing 10 .

[0046] It can be understood that the design of the water-guiding pattern should meet the need to guide the condensation and guide it to areas other than the connection points.

[0047] In this way, the water-conducting lines can constrain and guide the flow of condensation to a designated area, thereby reducing the impact of condensation on the junction box 100 .

[0048] In some embodiments, the housing 10 further has a water storage cavity 17 at the bottom thereof, and the water guiding lines guide the water storage cavity 17 .

[0049] The water storage chamber 17 is capable of collecting condensation formed on the inner surface of the shell 10 . The water storage chamber 17 is located at the bottom of the shell 10 . Under the action of gravity, the condensation moves along the water-conducting lines on the inner surface of the shell 10 and finally reaches the water storage chamber 17 .

[0050] In this way, under the guidance of the water-conducting lines, condensation can be concentrated in the water storage chamber 17 to prevent it from flowing to other areas and affecting wiring safety.

[0051] Furthermore, the junction box 100 further includes a drainage assembly (not shown), which is disposed at the water storage chamber 17 and is configured to discharge the water in the water storage chamber 17 in a controlled manner.

[0052] It can be understood that the drainage component includes a drainage mechanism, which can be but is not limited to a drainage motor, a drainage pump, etc. It only needs to be able to drive the water in the water storage chamber 17 to be discharged outside the junction box 100, and is not specifically limited here.

[0053] In this way, under the action of the drainage component, the water in the water storage chamber 17 can be actively discharged outward to prevent excessive accumulation of condensation.

[0054] In some embodiments, the drainage assembly includes a liquid level component, which is disposed in the water storage chamber 17 and electrically connected to the drainage mechanism. The liquid level component is a liquid level detector or a liquid level switch, and operates based on the detection information of the liquid level component.

[0055] It can be understood that the junction box 100 may also include a main board (not shown), and the liquid level component and the drainage mechanism are both electrically connected to the main board. In other words, the liquid level component and the drainage mechanism are indirectly electrically connected through the main board. The liquid level component detection information is transmitted to the main board, and after being processed by the main board, a control signal for controlling the operation of the drainage mechanism is generated.

[0056] The liquid level detector can detect the liquid level in the water storage chamber 17. When the liquid level is not less than R, the drainage mechanism starts and stops working after draining the water in the water storage chamber 17. The liquid level switch can be triggered when the liquid level in the water storage chamber 17 reaches R, thereby controlling the drainage mechanism to start and drain the water in the water storage chamber 17.

[0057] In this way, the drainage component can work according to the liquid level conditions, and when the liquid level is not less than R, the water in the water storage chamber 17 is discharged in time.

[0058] In some other embodiments, a drain port may be provided at the bottom of the housing 10, the drain port is connected to the outside of the junction box 100, and the water-guiding lines lead to the drain port. In this way, condensation formed on the inner surface of the housing 10 can flow directly to the drain port under the guidance of the water-guiding lines and be discharged.

[0059] Please also read Figures 4 to 6 In some embodiments, the junction box 100 also includes a refrigerant circulation component 70, the refrigerant circulation component 70 includes a flow controller 71 and a refrigerant pipeline 73, the refrigerant pipeline 73 connects the refrigerant injection port and the refrigerant discharge port, the flow controller 71 is disposed on the refrigerant pipeline 73, and is configured to control the flow of the refrigerant pipeline 73.

[0060] The refrigerant pipeline 73 is used to inject and discharge refrigerant into the refrigerant cavity 15 of the shell 10 . The flow controller 71 is located on the refrigerant pipeline 73 and can control the flow of the refrigerant in the refrigerant pipeline 73 , thereby changing the flow of the refrigerant entering the refrigerant cavity 15 of the shell 10 .

[0061] In this way, the flow rate of the refrigerant in the refrigerant cavity 15 of the shell 10 is controllable, and the degree of cooling of the shell 10 is changed by controlling the flow rate of the refrigerant, thereby adjusting the temperature difference between the shell 10 and the outside.

[0062] In some embodiments, the junction box 100 also includes a temperature sensor (not shown), which is disposed in the shell 10 and electrically connected to the flow controller 71. The temperature sensor is configured to detect the internal and external temperatures or the internal and external temperature difference of the junction box 100, and the flow controller 71 operates based on the detection information of the temperature sensor.

[0063] The temperature sensor and the flow controller 71 may both be electrically connected to the main board, and the signal detected by the temperature sensor is transmitted to the main board, and the main board generates a control signal for controlling the operation of the flow controller 71 based on the detection information of the temperature sensor. In addition, the junction box 100 may also include a humidity sensor, etc., and the flow controller 71 operates based on the detection information of the temperature sensor and the detection information of the humidity sensor.

[0064] The temperature sensor can detect the internal and external temperatures of the box respectively, and the flow controller 71 controls the flow based on the temperature information; the temperature sensor can also detect the internal and external temperatures of the box respectively, calculate the internal and external temperature difference of the junction box 100 or directly detect the internal and external temperature difference of the junction box 100, and the flow controller 71 controls the flow based on the temperature difference information. Among them, the temperature inside the box can refer to the temperature of the surface of the inner shell 11 or the air temperature inside the box, and the temperature outside the box can refer to the external environment temperature of the junction box 100, that is, the air temperature outside the box.

[0065] Specifically, the temperature sensor may include a first sensor and a second sensor. The first sensor may be disposed on the inner surface of the housing 10, that is, on the inner shell 11, to detect the inner surface temperature of the inner shell 11. The second sensor may be disposed on the outer surface of the housing 10, that is, on the outer shell 13, to detect the temperature outside the box.

[0066] In this way, the detection box can change the flow rate of the refrigerant introduced through the flow controller 71 according to the current internal and external temperature conditions, and then adjust the cooling temperature of the shell 10 to ensure that the internal and external temperature difference of the junction box 100 is the optimal condition for condensation to occur, thereby improving the condensation effect.

[0067] In some embodiments, the flow controller 71 includes an electronic expansion valve 711 and / or a solenoid valve 713 .

[0068] Flow control may include changing the flow rate and completely closing the refrigerant pipeline 73, wherein the electronic expansion valve 711 can accurately control the refrigerant flow rate and thus accurately control the temperature of the surface of the inner shell 11, and the solenoid valve 713 can completely close the refrigerant pipeline 73.

[0069] Specifically, the flow controller 71 includes an electronic expansion valve 711 and a solenoid valve 713, and the refrigerant pipeline 73 includes an inlet pipe 731, an intermediate pipe 733, an injection pipe 735, and a discharge pipe (not shown), wherein the inlet pipe 731, the intermediate pipe 733, and the injection pipe 735 are connected in sequence, the electronic expansion valve 711 is located between the inlet pipe 731 and the intermediate pipe 733, and the solenoid valve 713 is located between the intermediate pipe 733 and the injection pipe 735. The inlet pipe 731 is connected to the compressor body 201, the injection pipe 735 is connected to the refrigerant injection port, and the discharge pipe is connected to the refrigerant discharge port. The inlet pipe 731 introduces the refrigerant into the refrigerant pipeline 73, and sequentially passes through the electronic expansion valve 711, the intermediate pipe 733, the solenoid valve 713, and the injection pipe 735, and is injected into the refrigerant cavity 15 of the junction box 100 through the injection pipe 735, and after cooling its housing 10, it is discharged into the discharge pipe from the refrigerant discharge port.

[0070] Please also read Figure 7 The working process of the above-mentioned junction box 100 includes: 1. The air-conditioning unit is started, and the compressor body 201 is running; 2. The solenoid valve 713 and the electronic expansion valve 711 are turned on to control the refrigerant to flow into the shell 10 of the junction box 100; 3. The temperature sensor monitors the temperature difference Δt between the inside and outside of the junction box 100, and the Δt feedback is used for the solenoid valve 713 and the electronic expansion valve 711 to control the refrigerant flow rate; 4. Condensation water droplets are formed on the inner surface of the shell 10 and slide down along the guide lines and merge into the water storage chamber 17; 5. The liquid level component detects whether the liquid level in the water storage chamber 17 is not less than R. If not, the drainage mechanism is closed. If so, the drainage mechanism is started and stops working after the water is drained. The liquid level component continuously detects the liquid level in the water storage chamber 17.

[0071] During the above working process, the refrigerant enters the refrigerant cavity 15 of the shell 10 through the refrigerant injection port, circulates and then is discharged from the refrigerant discharge port, so as to reduce the temperature of the inner surface of the junction box 100, that is, the inner surface of the inner shell layer 11. When the outside air enters the junction box 100, condensation will first occur on the inner surface of the shell 10. At this time, the condensed water droplets will be adsorbed on the surface of the hydrophobic layer 30 and float up and flow into the water storage cavity 17 under the action of gravity. At the same time, the temperature sensor will monitor the temperature difference between the inside and outside of the junction box 100, and provide the main board with a feedback signal calculated through the condensation curve to adjust the electronic expansion valve 711. By adjusting the flow rate of the refrigerant, the inner surface temperature of the inner shell layer 11 is controlled, so that most of the moisture in the air will condense on the surface of the shell 10, ensuring the dryness of the air near the terminal 50 inside the junction box 100. At the same time, when the water level in the water storage cavity 17 gradually rises to R, the liquid level switch is triggered, the box drainage mechanism is started, and the water in the water storage cavity 17 is emptied. Then the drainage mechanism stops working, completing the whole process of anti-condensation in the junction box 100.

[0072] The shell 10 of the junction box 100 adopts a double-layer design, and the refrigerant of the compressor body 201 is injected into the shell 10 through the refrigerant circulation component 70 to form a circulation. A temperature sensor is installed on the inner shell 10 of the junction box 100 to monitor the temperature, and the flow rate of the refrigerant in the shell 10 is controlled by the electronic expansion valve 711 and the solenoid valve 713 to ensure that the temperature difference between the inside and outside of the junction box 100 is the best condition for condensation to occur.

[0073] The super-hydrophobic material produced by lotus leaf bionic technology forms a hydrophobic coating on the inner surface of the housing 10 of the junction box 100, and through the design of the coating texture, the condensed water droplets automatically flow into the water storage chamber 17 along the condensed surface and then discharge from the junction box 100, thereby preventing the condensed water droplets from reducing the insulation of the equipment and causing failures, thereby solving the problem of potential safety hazards of electrical components caused by condensation in the junction box 100 and improving the reliability and safety of the electrical system. The system is simple, easy to install, implement and replace, and is suitable for relatively small electrical structures such as the junction box 100.

[0074] The present application also provides a compressor 200 , comprising the above-mentioned junction box 100 .

[0075] In some embodiments, the compressor 200 further includes a compressor body 201 , the junction box 100 is disposed on the compressor body 201 , and all structural surfaces of the junction box 100 intersect with the horizontal plane.

[0076] Specifically, the terminal box 100 is disposed on the casing 203 of the compressor body 201, and the terminal box 100 is tilted. For example, the casing 10 of the terminal box 100 is generally in the shape of a rectangular parallelepiped, and among all six faces of the rectangular parallelepiped, four faces are perpendicular to the horizontal plane, and the remaining two faces are obliquely intersecting with the horizontal plane.

[0077] In this way, the condensation formed on the inner surface of the junction box 100 can flow to the bottom of the housing 10 better with the help of gravity, reducing the possibility of the condensation remaining in place and gathering to form large water droplets.

[0078] In some embodiments, the refrigerant injection port of the junction box 100 is connected to the compressor body 201 .

[0079] Specifically, the refrigerant injection port may be connected to the exhaust port of the compressor body 201, and the refrigerant discharge port may be connected to the intake port of the compressor body 201 to form a refrigerant circulation.

[0080] In this way, the junction box 100 can directly obtain refrigerant from the compressor body 201 for cooling its own shell 10 .

[0081] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A junction box, characterized in that: The junction box comprises a shell (10) and a hydrophobic layer (30), the shell (10) comprising an inner shell layer (11) and an outer shell layer (13), the inner shell layer (11) and the outer shell layer (13) being spaced apart to form a refrigerant cavity (15), the shell (10) further comprising a refrigerant injection port and a refrigerant discharge port connected to the refrigerant cavity (15); the hydrophobic layer (30) is coated on the inner surface of the inner shell layer (11).

2. The junction box according to claim 1, characterized in that: The surface of the hydrophobic layer (30) has water-conducting lines, and the water-conducting lines lead to the bottom of the housing (10).

3. The junction box according to claim 2, characterized in that: The housing (10) further comprises a water storage cavity (17) located at the bottom thereof, and the water-guiding pattern guides the water storage cavity (17).

4. The junction box according to claim 3, characterized in that: The junction box further comprises a drainage component, which is arranged at the water storage chamber (17) and is configured to discharge water in the water storage chamber (17) in a controlled manner.

5. The junction box according to claim 4, characterized in that: The drainage assembly comprises a drainage mechanism and a liquid level component, the liquid level component is arranged in the water storage chamber (17) and is electrically connected to the drainage mechanism, and the liquid level component is a liquid level detector or a liquid level switch.

6. The junction box according to claim 1, characterized in that: The hydrophobic layer (30) is made of a super-hydrophobic material; and / or the hydrophobic layer (30) is a hydrophobic coating.

7. The junction box according to any one of claims 1 to 6, characterized in that: The junction box also includes a refrigerant circulation component (70), the refrigerant circulation component (70) includes a flow controller (71) and a refrigerant pipeline (73), the refrigerant pipeline (73) is connected to the refrigerant injection port and the refrigerant discharge port, the flow controller (71) is arranged on the refrigerant pipeline (73), and is configured to control the flow of the refrigerant pipeline (73).

8. The junction box according to claim 7, characterized in that: The junction box further comprises a temperature sensor, which is arranged on the housing (10) and is electrically connected to the flow controller (71), and is configured to detect the internal and external temperatures or the internal and external temperature difference of the junction box.

9. The junction box according to claim 7, characterized in that: The flow controller (71) comprises an electronic expansion valve (711) and / or a solenoid valve (713).

10. A compressor, characterized in that: Comprising a junction box as described in any one of claims 1-9.

11. The compressor according to claim 10, characterized in that The compressor further comprises a compressor body (201), the junction box is arranged on the compressor body (201), and all structural surfaces of the junction box intersect with a horizontal plane.

12. The compressor according to claim 10, characterized in that The compressor further comprises a compressor body (201), and the refrigerant injection port of the junction box is connected to the compressor body (201).

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