Electric control cabinet and heating and ventilation equipment

Abstract

The invention relates to the technical field of heating and ventilation equipment, and particularly discloses an electric control cabinet and heating and ventilation equipment.The electric control cabinet comprises a cabinet body, an electric control cavity is defined in the cabinet body, and the cabinet body is provided with a hinge piece used for being hinged to a case; the heat exchanger is arranged in the electric control cavity, and the heat exchanger is provided with a refrigerant inlet and a refrigerant outlet; each rotary valve comprises a male valve body and a female valve body rotatably arranged outside the male valve body in a sleeving manner, the female valve body and the male valve body in one rotary valve are communicated with the refrigerant inlet and the refrigerant inlet pipe respectively, and the female valve body and the male valve body in the other rotary valve are communicated with the refrigerant outlet and the refrigerant outlet pipe respectively; the two hinge pieces and the rotary valve are coaxially arranged. According to the electric control cabinet, in the long-term use process, the refrigerant inlet pipe and the refrigerant outlet pipe which are used for conveying the refrigerant to the heat exchanger cannot generate stress fatigue, so that the problem that the refrigerant inlet pipe and the refrigerant outlet pipe act along with the cabinet body to exceed the fatigue strength limit and fail is solved, and the stability and the safety of operation of the electric control cabinet can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of HVAC equipment, and in particular to an electric control cabinet and HVAC equipment. Background Art

[0002] In some electronic control equipment, liquid cooling is used to dissipate heat from the electronic control cabinet. At the same time, in order to facilitate the later inspection and maintenance of the electronic control cabinet, the electronic control cabinet is designed to be flippable or slidable. Due to the position change of the electronic control cabinet, the refrigerant inlet pipe and the refrigerant outlet pipe for conveying liquid cooling medium must be set to be connected with a hose so as to utilize the bendable deformation characteristics of the hose to compensate for the displacement of the electronic control cabinet. However, the large movement of the refrigerant inlet pipe and the refrigerant outlet pipe will result in poor long-term product reliability. Once the refrigerant inlet pipe or the refrigerant outlet pipe reaches the fatigue strength limit, it is easy to fail, which will affect the heat dissipation and destroy the safety of the entire machine. Summary of the invention

[0003] The purpose of the present invention is to at least solve the problem of fatigue failure of the refrigerant hose caused by the flipping of the electric control cabinet. This purpose is achieved through the following technical solutions:

[0004] The first aspect of the present invention proposes an electric control cabinet, which includes: a cabinet body, which defines an electric control cavity for accommodating electronic devices, and the cabinet body is provided with a hinge for hingedly connecting with a chassis; a heat exchanger, which is arranged in the electric control cavity, and the heat exchanger has a refrigerant inlet and a refrigerant outlet; two rotary valves, the rotary valves include a male valve body and a female valve body rotatably mounted outside the male valve body; a refrigerant inlet pipe, the female valve body and the male valve body in one of the rotary valves are respectively connected to the refrigerant inlet and the refrigerant inlet pipe; a refrigerant outlet pipe, the female valve body and the male valve body in the other rotary valve are respectively connected to the refrigerant outlet and the refrigerant outlet pipe, and the two rotary valves are respectively coaxially arranged with the hinge.

[0005] According to the electric control cabinet proposed in the present invention, the male valve body and the female valve body of the rotary valve body are respectively connected to the heat exchanger and the refrigerant inlet pipe and the refrigerant outlet pipe arranged in the electric control cavity, and the rotary valve and the hinge are coaxially arranged. When the cabinet body of the electric control cabinet rotates relative to the chassis, the male valve body and the female valve body in the rotary valve can rotate relatively, and the refrigerant inlet pipe and the refrigerant outlet pipe will not rotate with the cabinet body. During long-term use, the refrigerant inlet pipe and the refrigerant outlet pipe used for conveying refrigerant to the heat exchanger will not generate stress fatigue, so as to solve the problem that the refrigerant inlet pipe and the refrigerant outlet pipe fail due to exceeding the fatigue strength limit due to the movement of the cabinet body, which is beneficial to ensuring the stability and safety of the operation of the electric control cabinet.

[0006] In addition, the electric control cabinet according to the present invention may also have the following additional technical features:

[0007] In some embodiments of the present invention, the heat exchanger includes a heat exchange part, a first connecting pipe and a second connecting pipe respectively connected to the heat exchange part, the first connecting pipe is provided with the refrigerant inlet, the second connecting pipe is provided with the refrigerant outlet, and the first connecting pipe and the second connecting pipe are respectively coaxially arranged with the rotary valve.

[0008] In some embodiments of the present invention, the heat exchange portion is configured as a heat exchange tube, which includes a winding section, a first segment and a second segment respectively connected to both ends of the winding section, the first segment is connected to and perpendicular to the first connecting tube, and the second segment is connected to and perpendicular to the second connecting tube.

[0009] In some embodiments of the present invention, the heat exchange part is located in the electric control cavity, the hinge, the first connecting pipe, the second connecting pipe and the two rotary valves are all located outside the electric control cavity and on the same side of the cabinet along a first direction, and the first direction is perpendicular to the axis of the rotary valve.

[0010] In some embodiments of the present invention, the inner circumference of the female valve body is provided with a first internal thread, and the outer circumference of the male valve body is provided with a first external thread matching the first internal thread, and the female valve body and the male valve body are threadedly connected by matching the first internal thread and the first external thread.

[0011] In some embodiments of the present invention, the rotary valve also includes a sealing ring, which is sleeved outside the male valve body and located inside the female valve body, the inner ring surface of the sealing ring abuts against the outer circumferential surface of the male valve body, and the outer ring surface of the sealing ring abuts against the inner circumferential surface of the female valve body.

[0012] In some embodiments of the present invention, the outer circumferential surface of the male valve body is provided with a first boss extending circumferentially, the outer circumferential surface of the first boss is provided with a first annular groove extending circumferentially, and the sealing ring is arranged in the first annular groove.

[0013] In some embodiments of the present invention, the inner circumferential surface of the female valve body is provided with a second annular groove extending circumferentially, and the outer circumferential surface of the male valve body is also provided with a second boss, the second boss and the first boss are spaced apart along the axial direction of the rotary valve, the second annular groove is located between the first boss and the second boss, the rotary valve also includes a retaining ring, the retaining ring is sleeved outside the male valve body and arranged in the second annular groove, and the retaining ring is respectively arranged opposite to the first boss and the second boss along the axial direction of the rotary valve.

[0014] In some embodiments of the present invention, the rotary valve further comprises a first valve bonnet and a second valve bonnet, the outer circumferential surface of the female valve body facing away from the end of the male valve body is provided with an external thread, the inner circumferential surface of the first valve bonnet is provided with an internal thread matching the female valve body, the first valve bonnet is used to be sleeved on the female valve body and threadedly connected to the female valve body, the outer circumferential surface of the male valve body facing away from the end of the female valve body is provided with an external thread, the inner circumferential surface of the second valve bonnet is provided with an internal thread matching the male valve body, the second valve bonnet is used to be sleeved on the male valve body and threadedly connected to the male valve body.

[0015] In the second aspect, the present invention provides a HVAC equipment, which includes a chassis and the electrical control cabinet described in the technical solution of the first aspect, and the chassis is hinged to the hinged parts in the electrical control cabinet; the HVAC equipment also includes a refrigerant circulation pipeline, and the refrigerant circulation pipeline is respectively connected to the refrigerant inlet pipe and the refrigerant outlet pipe, and the refrigerant circulation pipeline, the refrigerant inlet pipe and the refrigerant outlet pipe jointly define a refrigerant circulation passage.

[0016] In some embodiments of the present invention, the HVAC equipment also includes a compressor, a condenser, an evaporator and a first throttling device, and the refrigerant circulation pipeline includes a first branch, a second branch and a third branch, the two ends of the first branch are respectively connected to the exhaust port of the compressor and the air inlet of the condenser, the two ends of the second branch are respectively connected to the exhaust port of the condenser and the air inlet of the evaporator, the two ends of the third branch are respectively connected to the exhaust port of the evaporator and the air inlet of the compressor, the first throttling device is arranged on the second branch, the second branch between the first throttling device and the exhaust port of the condenser is connected to the refrigerant inlet pipe, and the second branch between the first throttling device and the air inlet of the evaporator is connected to the refrigerant outlet pipe.

[0017] In some embodiments of the present invention, the HVAC equipment further includes a second throttling device disposed on the refrigerant inlet pipe.

[0018] In some embodiments of the present invention, the HVAC equipment further comprises a one-way valve arranged on the refrigerant outlet pipe, and the one-way valve is used for unidirectional conduction from the refrigerant outlet in the electric control cabinet to the air inlet of the evaporator.

[0019] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1The structure diagram of an electric control cabinet according to an embodiment of the present invention is schematically shown;

[0021] Figure 2 The structure diagram of a rotary valve according to an embodiment of the present invention is schematically shown;

[0022] Figure 3 The structure diagram of a mother valve body according to an embodiment of the present invention is schematically shown;

[0023] Figure 4 The structure diagram of a male valve body according to an embodiment of the present invention is schematically shown;

[0024] Figure 5 A schematic diagram schematically shows a rotary valve according to an embodiment of the present invention being connected to a refrigerant inlet pipe and a first connecting pipe respectively;

[0025] Figure 6 A schematic diagram schematically shows a rotary valve according to an embodiment of the present invention being connected to a refrigerant outlet pipe and a second connecting pipe respectively;

[0026] Figure 7 The structure diagram of the electric control cabinet after rotation according to one embodiment of the present invention is schematically shown;

[0027] Figure 8 The structure diagram of a HVAC device according to an embodiment of the present invention is schematically shown;

[0028] Fig. 9 The schematic diagram of the structure of a male valve body, a female valve body and a sealing gasket according to an embodiment of the present invention is schematically shown.

[0029] The reference numerals are as follows:

[0030] 100. Electric control cabinet;

[0031] 10. Cabinet; 11. Electric control chamber;

[0032] 20. Hinged parts;

[0033] 30. heat exchanger; 31. first connecting pipe; 32. second connecting pipe; 33. heat exchange pipe; 331. meandering section; 332. first section; 333. second section;

[0034] 40. Rotary valve; 41. Male valve body; 411. Third valve body; 4111. Stopper; 412. Fourth valve body; 413. Fifth valve body; 4101. First annular groove; 4132. First boss; 4131. Second boss; 42. Female valve body; 421. First valve body; 4211. First inner cavity; 4212. Second inner cavity; 4213. Step surface; 4214. First internal thread; 422. Second valve body; 4201. Second annular groove; 43. Sealing ring; 44. Retaining ring; 45. First valve bonnet; 46. Second valve bonnet; 47. Sealing gasket;

[0035] 50. Refrigerant inlet pipe;

[0036] 60. Refrigerant outlet pipe;

[0037] 200. HVAC equipment;

[0038] 210, compressor; 220, condenser; 230, evaporator; 240, refrigerant circulation pipeline; 241, first branch; 242, second branch; 243, third branch; 250, first throttling device; 260, second throttling device; 270, one-way valve; 280, fan;

[0039] X, first direction. DETAILED DESCRIPTION

[0040] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0041] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0042] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; 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 the present invention can be understood according to specific circumstances.

[0044] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is rotated, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both above and below orientations.

[0045] In the refrigeration system of the air conditioner, an electric control cabinet is needed to control each device. The electrical equipment inside the electric control cabinet will generate a certain amount of heat during operation. If the heat cannot be dissipated in time, the temperature inside the electric control cabinet will continue to rise, exceeding the temperature tolerance range of the equipment, thereby causing equipment failure or damage. Therefore, the electric control cabinet needs to control the internal temperature by heat dissipation to ensure the normal operation of the equipment. In some electronic control equipment, liquid cooling is used to dissipate heat for the electric control cabinet. At the same time, in order to facilitate the later inspection and maintenance of the electric control cabinet, the electric control cabinet is designed to be flippable or slidable. Based on the position change of the electric control cabinet, it is necessary to set the refrigerant inlet pipe and the refrigerant outlet pipe for conveying liquid cooling medium to be connected with a hose, so as to use the bendable deformation characteristics of the hose to compensate for the displacement of the electric control cabinet. However, the large movement of the refrigerant inlet pipe and the refrigerant outlet pipe will result in poor reliability of the long-term operation product. Once the refrigerant inlet pipe or the refrigerant outlet pipe reaches the fatigue strength limit, it is easy to fail, which will affect the heat dissipation and destroy the safety of the whole machine.

[0046] Based on the above considerations, the present invention proposes an electric control cabinet, which utilizes a male valve body and a female valve body of a rotary valve body to respectively connect a heat exchanger and a refrigerant inlet pipe and a refrigerant outlet pipe arranged in an electric control cavity, and the rotary valve and the hinge are coaxially arranged. When the cabinet body of the electric control cabinet rotates relative to the chassis, the male valve body and the female valve body in the rotary valve can rotate relatively, and the refrigerant inlet pipe and the refrigerant outlet pipe will not rotate with the cabinet body, thereby solving the problem that the refrigerant inlet pipe and the refrigerant outlet pipe fail due to exceeding the fatigue strength limit due to the movement of the cabinet body.

[0047] According to an embodiment of the present invention, an electric control cabinet is provided. Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the electric control cabinet 100 includes a cabinet body 10 , a hinge 20 , a heat exchanger 30 , a refrigerant inlet pipe 50 , a refrigerant outlet pipe 60 and two rotary valves 40 .

[0048] Specifically, the cabinet 10 is a hollow square shell structure, and an electric control chamber 11 is defined inside the cabinet 10. The electric control chamber 11 is used to install a variety of electronic devices, including inverters, circuit breakers, voltage stabilizers, transformers, contactors, microprocessors, etc. The inverters, voltage stabilizers, etc. arranged in the electric control chamber 11 will generate a lot of heat during operation, so it is necessary to dissipate heat to ensure the stable operation of the electric control cabinet 100.

[0049] The hinge 20 is installed on the outer wall of the cabinet 10, and the hinge 20 is used to be hinged with the chassis so that the cabinet 10 can rotate relative to the chassis to achieve the change of the relative position of the cabinet 10 and the chassis, so as to facilitate the later maintenance, maintenance and replacement of the electronic components inside the cabinet 10. For example, before maintenance, the cabinet 10 is arranged inside the chassis. When maintenance is required, the cabinet 10 is rotated 90° or 180° relative to the chassis around the rotating shaft of the hinge 20, so that the cabinet 10 is rotated to the outside of the chassis, thereby providing sufficient maintenance space for maintenance personnel. The chassis in this embodiment is a chassis of a HVAC device 200, such as a chassis of an outdoor unit or a chassis of an indoor unit or a chassis of an internal and external integrated machine. It should be noted that the chassis can also be replaced by a carrier that needs to be set up in other fields such as elevators, security equipment, energy management systems, etc. The carrier can be either a shell of the equipment or a structure such as a wall.

[0050] The heat exchanger 30 is arranged in the electric control cavity 11, and is used to deliver cold to the electronic devices in the electric control cavity 11 or the internal space of the electric control cavity 11, and cool down and dissipate heat for the electronic devices in the electric control cavity 11. The heat exchanger 30 has an inner cavity for the flow of refrigerant, and has a refrigerant inlet and a refrigerant outlet connected to the inner cavity. After the refrigerant flows into the heat exchanger 30 from the refrigerant inlet pipe 50 and the refrigerant inlet to exchange heat with the electronic devices in the electric control cavity 11, it flows from the refrigerant outlet to the refrigerant outlet pipe 60 and then flows out of the heat exchanger 30, realizing the circulation of the refrigerant in the heat exchanger 30.

[0051] Further, the refrigerant inlet pipe 50 is connected to the refrigerant inlet through a rotary valve 40, and the refrigerant outlet pipe 60 is connected to the refrigerant outlet through another rotary valve 40, and the two rotary valves 40 have the same structure. Specifically, the rotary valve 40 includes a female valve body 42 and a male valve body 41, and the female valve body 42 and the male valve body 41 are both tubular structures. The female valve body 42 is rotatably sleeved outside the male valve body 41, and the female valve body 42 and the male valve body 41 of a rotary valve 40 are respectively connected to the refrigerant inlet and the refrigerant inlet pipe 50, for example, the male valve body 41 is connected to the refrigerant inlet, and the female valve body 42 is connected to the refrigerant inlet pipe 50, or the female valve body 42 is connected to the refrigerant inlet, and the male valve body 41 is connected to the refrigerant inlet pipe 50. The female valve body 42 and the male valve body 41 of another rotary valve 40 are respectively connected to the refrigerant outlet and the refrigerant outlet pipe 60. For example, the male valve body 41 is connected to the refrigerant outlet, and the female valve body 42 is connected to the refrigerant outlet pipe 60, or the female valve body 42 is connected to the refrigerant outlet, and the male valve body 41 is connected to the refrigerant outlet pipe 60.

[0052] In the present embodiment, when the cabinet body 10 of the electric control cabinet rotates relative to the chassis, the male valve body 41 and the female valve body 42 in the rotary valve 40 can rotate relative to each other, and the refrigerant inlet pipe 50 and the refrigerant outlet pipe 60 will not rotate with the cabinet body 10, thereby solving the problem of the refrigerant inlet pipe 50 and the refrigerant outlet pipe 60 failing due to exceeding the fatigue strength limit due to the movement with the cabinet body 10, which is beneficial to ensuring the stability and safety of the operation of the electric control cabinet 100.

[0053] In this embodiment, the hinge 20 is a hinge-type hinge, made of 304 stainless steel, and structurally composed of two interconnected metal sheets, connected together by a hinge axis, usually fixed by screws or rivets, etc. The cabinet 10 is fixed to the chassis by the hinge-type hinge, wherein the chassis can also be the frame structure of the air-conditioning unit. The refrigerant inlet pipe 50 and the refrigerant outlet pipe 60 are copper internal threaded pipes, and the pipe diameter is generally φ7mm or φ9mm. The refrigerant inlet pipe 50 and the refrigerant outlet pipe 60 are fixedly arranged on the chassis. When the cabinet 10 rotates relative to the chassis, the refrigerant inlet pipe 50 and the refrigerant outlet pipe 60 will not rotate with the cabinet 10.

[0054] In some embodiments, please combine Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the heat exchanger 30 includes a heat exchange part, a first connecting pipe 31 and a second connecting pipe 32 respectively connected to the heat exchange part, a part of the heat exchange part is arranged in the electric control chamber 11, and the other part of the heat exchange part is located outside the electric control chamber 11 and is respectively connected to the first connecting pipe 31 and the geothermal connecting pipe. Specifically, the end of the first connecting pipe 31 away from the heat exchange part forms a refrigerant inlet, and the end of the second connecting pipe 32 away from the heat exchange part forms a refrigerant outlet. The first connecting pipe 31 and the second connecting pipe 32 are coaxially arranged, and the first connecting pipe 31, the second connecting pipe 32, the refrigerant inlet pipe 50, the refrigerant outlet pipe 60, the hinge axis of the hinge 20 and the rotary valve 40 are all coaxially arranged.

[0055] The heat exchange part is a heat-conducting metal device with a refrigerant passage, and the heat exchange part can be set to a variety of structural forms according to the internal structure of the electric control cavity 11 and the heat dissipation requirements of the electronic components inside the electric control cavity 11. For example, in some embodiments, the heat exchange part can be set to a plate-like structure with multiple refrigerant passages inside. The refrigerant flowing into the heat exchange part from the refrigerant inlet pipe 50 passes through the plate-like structure and the electronic components installed on the heat exchange part, such as the IGBT module in the inverter, to achieve cooling. In other embodiments, the heat exchange part can also be set to the same structure as the finned heat sink to cool the air inside the electric control cavity 11, so as to reduce the ambient temperature inside the electric control cavity 11, thereby achieving heat dissipation of the electronic components.

[0056] In this embodiment, the heat exchange part includes a zigzag heat exchange tube 33, which is a copper internal threaded tube with a diameter of generally φ7mm or φ9mm. The heat exchange tube 33 includes a winding section 331 arranged in the electric control chamber 11, a first section 332 and a second section 333 respectively connected to the two ends of the winding section 331, the first section 332 is connected to the first connecting tube 31 and is perpendicular, and the second section 333 is connected to the second connecting tube 32 and is perpendicular. The cabinet 10 includes a fixed plate, and the winding section 331 is installed on the fixed plate in a serpentine coil manner. In this embodiment, the heat exchange part is located in the electric control chamber 11, and the hinge 20, the first connecting tube 31, the second connecting tube 32 and the two rotary valves 40 are all located outside the electric control chamber 11, and are located on the same side of the cabinet 10 along the first direction, so as to facilitate the assembly of various components such as the hinge 20, the first connecting tube 31, the second connecting tube 32 and the two rotary valves 40. The length directions of the first segment 332 and the second segment 333 are parallel to the first direction, and the first direction is perpendicular to the axis of the rotary valve 40 .

[0057] In this embodiment, please combine Figure 2 , Figure 3 and Figure 4As shown, the mother valve body 42 includes a first valve body 421 and a second valve body 422 which are connected and communicated with each other, the outer diameter of the first valve body 421 is larger than the outer diameter of the second valve body 422, and the inner diameter of the first valve body 421 is larger than the inner diameter of the second valve body 422, and the inner cavity of the first valve body 421 is arranged as a first inner cavity 4211 and a second inner cavity 4212 with unequal inner diameters, the first inner cavity 4211 is located between the inner cavity of the second valve body 422 and the second inner cavity 4212, and the inner diameter of the second inner cavity 4212 is larger than the inner diameter of the first inner cavity 4211, wherein a step surface 4213 is formed at the connection between the first inner cavity 4211 and the second inner cavity 4212, and the inner circumferential surface of the first inner cavity 4211 is provided with a first internal thread 4214. The male valve body 41 includes a third valve body 411, a fourth valve body 412 and a fifth valve body 413 which are sequentially connected and communicated with each other. The third valve body 411, the fourth valve body 412 and the fifth valve body 413 are all tubular structures. The third valve body 411 and the fourth valve body 412 are located in the inner cavity of the second valve body 422, and the third valve body 411 is located in the first inner cavity 4211, and the fourth valve body 412 is located in the second inner cavity 4212. The outer peripheral surface of the third valve body 411 is provided with a first external thread matched with the first internal thread 4214, and the third valve body 411 is threadedly connected with the second valve body 422, so that the male valve body 41 and the female valve body 42 can be tightly connected together through the interference fit of the first internal thread 4214 and the first external thread, and the relative rotation of the two parts can be achieved. The outer diameter of the third valve body 411 is equal to the outer diameter of the fourth valve body 412. Since the inner diameter of the second inner cavity 4212 is larger than the inner diameter of the first inner cavity 4211, the outer diameter of the fourth valve body 412 is smaller than the inner diameter of the second inner cavity 4212, so that there is a gap between the outer circumferential surface of the fourth valve body 412 and the inner circumferential surface of the second inner cavity 4212, so that during the rotation of the first external thread relative to the first internal thread 4214, the outer circumferential surface of the fourth valve body 412 and the inner circumferential surface of the second inner cavity 4212 do not interfere with each other, so that the relative rotation of the male valve body 41 and the female valve body 42 is smoother.

[0058] In this embodiment, the material of the female valve body 42 is C3771 lead brass, which has excellent cutting performance, wear resistance, high strength, and good cold and hot processing properties. The material of the male valve body 41 is C3604 brass, which has excellent cutting performance, wear resistance, and high strength, and is mainly used in various connectors, valves, and valve stem bearings in mechanical engineering, and has a dense and uniform structure.

[0059] Furthermore, please combine Figure 2 , Figure 3 and Figure 4As shown, a stop portion 4111 is further convexly provided on the outer circumferential surface of the third valve body 411 close to the fourth valve body 412. The stop portion 4111 is annular and extends along the circumferential direction of the third valve body 411. Along the axial direction of the third valve body 411, the stop portion 4111 and the step surface 4213 are arranged opposite to each other. When the third valve body 411 is inserted into the inner cavity of the first inner cavity 4211 and the end of the third valve body 411 is close to the first inner cavity 4211 and away from one end of the second inner cavity 4212, the stop portion 4111 abuts against the step surface 4213, thereby limiting the rotation of the male valve body 41.

[0060] Furthermore, please combine Figure 2 , Figure 3 and Figure 4 As shown, the rotary valve 40 also includes a sealing ring 43, which is sleeved on the outside of the fourth valve body 412 of the male valve body 41 and located in the second inner cavity 4212. The inner ring surface of the sealing ring 43 abuts against the outer peripheral surface of the fourth valve body 412, and the outer ring surface of the sealing ring 43 abuts against the inner peripheral surface of the second inner cavity 4212, thereby sealing the gap between the male valve body 41 and the female valve body 42 to prevent the refrigerant from leaking from the gap between the male valve body 41 and the female valve body 42, and also prevents the outside air from invading the refrigeration system pipeline and causing pollution.

[0061] In this embodiment, the sealing ring 43 is configured as an O-ring, and the material of the O-ring is highly hydrogenated nitrile rubber (H-NBR), which has good heat resistance, oil resistance, wear resistance and ozone resistance. In addition, H-NBR also has good crack resistance and cold resistance, can maintain good elasticity at a lower temperature, and can adapt to the flow of low-temperature refrigerant in the refrigeration system.

[0062] In some embodiments, please combine Figure 2 , Figure 3 and Figure 4 As shown, the outer circumferential surface of the fourth valve body 412 is provided with a first boss 4132 extending circumferentially, and the outer circumferential surface of the first boss 4132 is provided with a first annular groove 4101 extending circumferentially. The first annular groove 4101 extends along the circumferential direction of the fourth valve body 412, and the sealing ring 43 is fixed in the first annular groove 4101 to improve the stability of the sealing ring 43 and improve the sealing performance.

[0063] In some embodiments, please combine Figure 2 , Figure 3 , Figure 4 and Figure 7As shown, the second annular groove 4201 circumferentially extends from the inner circumference of the second inner cavity 4212 in the second valve body 422, and along the axial direction of the rotary valve, the second annular groove 4201 is located between the first boss 4132 and the second boss 4131, the outer diameter of the fourth valve body 412 is larger than the outer diameter of the third valve body 411, and a second boss 4131 is formed at the connection between the third valve body 411 and the fourth valve body 412, the outer diameter of the fourth valve body 412 is smaller than the inner diameter of the second inner cavity 4212, and the second boss 4131 and the second annular groove 4201 are spaced apart from each other along the axial direction of the rotary valve 40. The rotary valve 40 further includes a retaining ring 44, which is sleeved outside the male valve body 41 and disposed in the second annular groove 4201, and the retaining ring 44 is disposed opposite to the first boss 4132 and the second boss 4131 along the axial direction of the rotary valve 40. The retaining ring 44 cooperates with the first boss 4132 and the second boss 4131 respectively to play a limiting role, which can limit the relative rotation angle between the male valve body 41 and the female valve body 42, and prevent the female valve body 42 and the male valve body from excessively rotating and causing disintegration. In this embodiment, the female valve body 42 and the male valve body 41 are provided with a rotation angle of 720°, which can meet most rotation requirements. If there are special selection angle requirements, the length of the first internal thread 4214 of the female valve body 42 and the first external thread of the male valve body 41 can be further increased to increase the rotation angle. In this embodiment, the material of the retaining ring 44 is 304 stainless steel, which plays a limiting role, and prevents the female valve body 42 and the male valve body 41 from excessively rotating and causing disintegration.

[0064] In some embodiments, please combine Figure 3 and Fig. 9 As shown, a sealing gasket 47 is further provided in the first inner cavity 4211 of the female valve body 42. The sealing gasket 47 is clamped between the male valve body 41 and the side wall of the first inner cavity 4211 along the axial direction of the female valve body 42. The sealing gasket 47 is squeezed by tightening the male valve body 41 and the female valve body 42 to seal the gap between the male valve body 41 and the female valve body 42 to prevent the refrigerant from leaking from the gap between the male valve body 41 and the female valve body 42.

[0065] It should be noted that the rotary valve in this embodiment can also adopt other structural methods to replace the rotary valve scheme in this application. For example, the rotary valve adopts the PVCB adjustable quick connector commonly used on the market. The male connector and the female connector can rotate relative to each other, and a sliding vane seal is arranged in the female connector. The male connector, the female connector and the sliding vane are interference fit, thereby sealing the gap between the male valve body and the female valve body, and preventing the refrigerant from leaking from the gap between the male valve body and the female valve body.

[0066] Furthermore, please combine Figure 2 , Figure 3 and Figure 4As shown, the outer circumferential surface of the first valve body 421 in the female valve body 42 is provided with an external thread, and the outer circumferential surface of the fifth valve body 413 in the male valve body 41 is provided with an external thread. The rotary valve 40 also includes a first valve bonnet 45 and a second valve bonnet 46. The inner circumferential surface of the first valve bonnet 45 is provided with an internal thread matching the first valve body 421. The first valve bonnet 45 is sleeved on the outside of the first valve body 421 of the female valve body 42 and is threadedly connected to the first valve body 421. The inner circumferential surface of the second valve bonnet 46 is provided with an internal thread matching the fifth valve body 413. The second valve bonnet 46 is sleeved on the outside of the fifth valve body 413 of the male valve body 41 and is threadedly connected to the fifth valve body 413. The first valve bonnet 45 and the second valve bonnet 45 are respectively used to protect the female valve body 42 and the male valve body 41 of the rotary valve 40 from foreign matter entering the interior of the rotary valve 40 during transportation and contaminating the refrigeration system pipeline, thereby ensuring the overall cleanliness of the rotary valve 40 and also reducing the situation where the O-ring is exposed to the air for a long time and loses its elasticity due to accelerated oxidation. At the same time, the first valve cap 45 and the second valve cap 46 can also protect the bell-mouth joints of the female valve body 42 and the male valve body 41 from being bumped and damaged during transportation. The first valve cap 45 and the second valve cap 46 are made of plastic to save costs, and can be removed before installation and discarded after installation.

[0067] In this embodiment, Figure 5 and Figure 6 As shown, one end of the female valve body 42 facing away from the male valve body 41 is set as a bell-mouth joint, and the other end of the male valve body 41 facing away from the female valve body 42 is set as a bell-mouth joint. Among the two rotary valves 40, the bell-mouth joint of the female valve body 42 of one rotary valve 40 is connected to the refrigerant inlet pipe 50 through a copper nut, and the bell-mouth joint of the female valve body 42 of the other rotary valve 40 is connected to the refrigerant outlet pipe 60 through a copper nut. In this way, the requirements of quick connection and flexible rotation of the refrigerant inlet pipe 50, the refrigerant outlet pipe 60 and the rotary valve 40 can be realized.

[0068] It should be noted that since the rotation of the male valve body 41 and the female valve body 42 is achieved by the cooperation of the first internal thread 4214 and the first external thread, when rotating a certain angle, the length of the refrigerant inlet pipe 50 and the refrigerant outlet pipe 60 at both ends of the male valve body 41 and the female valve body 42 will change, and it is necessary to increase the copper pipe bend to accommodate the change. The refrigeration pipelines at both ends of the rotary valve 40 (i.e., the refrigerant inlet pipe 50 and the refrigerant outlet pipe 60) cannot be fixed by a pipe clamp to restrict their movement, otherwise the rotation of the rotary valve 40 will be restricted. The pitch of the first internal thread 4214 of the female valve body 42 and the first external thread of the male valve body 41 can be adjusted according to actual needs. When the pitch becomes smaller, the change in the length of the refrigeration pipelines at both ends caused by the rotation angle of the rotary valve 40 will become smaller, and the impact on the refrigeration pipeline will also be small, but the smaller pitch puts higher requirements on the processing progress requirements and rotation force of the valve body, and the size of the pitch can be appropriately set.

[0069] According to an embodiment of the present invention, Figure 8 As shown, a HVAC device 200 is also proposed, which includes a chassis and an electric control cabinet 100, and the chassis is hinged to a hinge 20 in the electric control cabinet 100. The HVAC device 200 also includes a refrigerant circulation pipeline 240, a compressor 210, a condenser 220, an evaporator 230 and a first throttling device 250.

[0070] Specifically, the refrigerant circulation pipeline 240 includes a first branch 241, a second branch 242 and a third branch 243. The two ends of the first branch 241 are respectively connected to the exhaust port of the compressor 210 and the air inlet of the condenser 220, the two ends of the second branch 242 are respectively connected to the exhaust port of the condenser 220 and the air inlet of the evaporator 230, and the two ends of the third branch 243 are respectively connected to the exhaust port of the evaporator 230 and the air inlet of the compressor 210. The first throttling device 250 is arranged on the second branch 242. The second branch 242 between the first throttling device 250 and the exhaust port of the condenser 220 is connected to the refrigerant inlet pipe 50, and the second branch 242 between the first throttling device 250 and the air inlet of the evaporator 230 is connected to the refrigerant outlet pipe 60. In this embodiment, the compressor 210 sucks the refrigerant from the evaporator 230 in a low-pressure state, compresses it into a high-temperature and high-pressure gas, and sends it to the condenser 220 for cooling. It is cooled to a high-pressure liquid refrigerant and is diverted through the second branch 242 and the refrigerant inlet pipe 50. Most of the refrigerant is throttled back to the evaporator 230 through the second branch 242 and the first throttling device 250 to complete the refrigeration cycle. A small part of the refrigerant is throttled by the second throttling device 260 on the refrigerant inlet pipe 50 to be throttled. The throttling is low-pressure two-phase refrigerant. It enters the heat exchanger 30 in the cabinet 10 from the refrigerant inlet pipe 50 through the rotary valve 40, and dissipates heat through the heat exchange tube 33. The refrigerant that has completed the heat dissipation passes through another rotary valve 40 and enters the refrigerant circulation pipeline 240 from the refrigerant outlet pipe 60, and merges into the refrigerant in the second branch 242 and returns to the evaporator 230, realizing the liquid cooling heat dissipation process of the electrical control cabinet 100.

[0071] In some embodiments, the first throttling device and the second throttling device are electronic expansion valves.

[0072] In some embodiments, the refrigerant outlet pipe 60 is further provided with a one-way valve 270, which is used for one-way conduction from the refrigerant outlet in the electric control cabinet 100 to the air inlet of the evaporator 230, and is used to control the one-way flow of the refrigerant. The function of the one-way valve 270 is to prevent the refrigerant from flowing back from the refrigerant outlet pipe 60 to the heat exchange tube 33. In this embodiment, the one-way valve 270 is a slide valve type one-way valve 270, and the internal structure consists of a slide valve and a valve seat. Under normal working conditions, the slide valve will be compressed, so that the refrigerant flows from the refrigerant outlet in the electric control cabinet 100 to the air inlet of the evaporator 230, and cannot flow back. The purpose of setting the one-way valve 270 is to prevent the refrigerant after throttling by the first throttling device 250 from entering the heat exchange tube 33 in the electric control cabinet 100 and lowering its temperature to below the dew point temperature, thereby reducing the risk of condensation on the electronic components in the electric control chamber 11.

[0073] In this embodiment, the evaporator 230 and the condenser 220 are tube-fin heat exchangers 30, with refrigerant inside. A fan 280 is provided on one side of the condenser 220. Under the action of the fan 280, the condenser 220 exchanges heat with the indoor and outdoor air. The compressor 210 is a rotor or scroll compressor 210, and its displacement and power specification type are determined according to the specific refrigeration capacity requirements. Its function is to suck the refrigerant from the evaporator 230 in a low-pressure state, compress it into a high-temperature and high-pressure gas, and then send it into the condenser 220 for cooling, so that it becomes a high-pressure liquid refrigerant, thereby completing the refrigeration cycle.

[0074] The first throttling device 250 and the second throttling device 260 are electromagnetic throttling devices, which realize automatic adjustment of the refrigerant flow rate through electromagnets and control circuits, and can automatically adjust the refrigerant flow rate according to the real-time working conditions, thereby realizing accurate control and adjustment of the cooling capacity. The first throttling device 250 mainly adjusts the flow rate in the evaporator 230 to provide cooling capacity for the main adjustment object of the air-conditioning system. The second throttling device 260 mainly adjusts the flow rate in the heat exchange tube 33 to provide cooling capacity for the electronic devices in the electric control cabinet 100.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An electric control cabinet, characterized in that: The electric control cabinet comprises: A cabinet body, the cabinet body defines an electric control cavity for accommodating electronic devices, and the cabinet body is provided with a hinge for being hinged to the chassis; A heat exchanger is disposed in the electric control chamber, and the heat exchanger has a refrigerant inlet and a refrigerant outlet; Two rotary valves, each of which comprises a male valve body and a female valve body rotatably sleeved on the male valve body; A refrigerant inlet pipe, wherein the female valve body and the male valve body in one of the rotary valves are respectively connected to the refrigerant inlet and the refrigerant inlet pipe; The refrigerant outlet pipe, the female valve body and the male valve body in the other rotary valve are respectively connected to the refrigerant outlet and the refrigerant outlet pipe, and the two rotary valves are respectively coaxially arranged with the hinged parts.

2. The electric control cabinet according to claim 1, characterized in that: The heat exchanger includes a heat exchange part, a first connecting pipe and a second connecting pipe respectively connected to the heat exchange part, the first connecting pipe is provided with the refrigerant inlet, the second connecting pipe is provided with the refrigerant outlet, and the first connecting pipe and the second connecting pipe are respectively coaxially arranged with the rotary valve.

3. The electric control cabinet according to claim 2, characterized in that: The heat exchange part is configured as a heat exchange tube, which includes a winding section, a first segment and a second segment respectively connected to both ends of the winding section, the first segment is connected to and perpendicular to the first connecting tube, and the second segment is connected to and perpendicular to the second connecting tube.

4. The electric control cabinet according to claim 2, characterized in that: The heat exchange part is located in the electric control chamber, and the hinge, the first connecting pipe, the second connecting pipe and the two rotary valves are all located outside the electric control chamber and on the same side of the cabinet along a first direction, and the first direction is perpendicular to the axis of the rotary valve.

5. The electric control cabinet according to any one of claims 1 to 4, characterized in that: The inner circumference of the female valve body is provided with a first internal thread, and the outer circumference of the male valve body is provided with a first external thread that matches the first internal thread. The female valve body and the male valve body are threadedly connected through the first internal thread and the first external thread.

6. The electric control cabinet according to claim 5, characterized in that: The rotary valve also includes a sealing ring, which is sleeved outside the male valve body and located in the female valve body, the inner ring surface of the sealing ring abuts against the outer peripheral surface of the male valve body, and the outer ring surface of the sealing ring abuts against the inner peripheral surface of the female valve body.

7. The electric control cabinet according to claim 6, characterized in that: The outer peripheral surface of the male valve body is provided with a first boss extending in a circumferential direction, the outer peripheral surface of the first boss is provided with a first annular groove extending in a circumferential direction, and the sealing ring is arranged in the first annular groove.

8. The electric control cabinet according to claim 5, characterized in that: The inner circumferential surface of the female valve body is provided with a second annular groove extending circumferentially, and the outer circumferential surface of the male valve body is also provided with a second boss. The second boss and the first boss are spaced apart along the axial direction of the rotary valve, and the second annular groove is located between the first boss and the second boss. The rotary valve also includes a retaining ring, which is sleeved outside the male valve body and arranged in the second annular groove. The retaining ring is respectively arranged opposite to the first boss and the second boss along the axial direction of the rotary valve.

9. The electric control cabinet according to claim 1, characterized in that: The rotary valve also includes a first valve bonnet and a second valve bonnet, the outer circumferential surface of the female valve body facing away from the male valve body is provided with an external thread, the inner circumferential surface of the first valve bonnet is provided with an internal thread matching the female valve body, the first valve bonnet is used to be sleeved on the female valve body and threadedly connected to the female valve body, the outer circumferential surface of the male valve body facing away from the female valve body is provided with an external thread, the inner circumferential surface of the second valve bonnet is provided with an internal thread matching the male valve body, the second valve bonnet is used to be sleeved on the male valve body and threadedly connected to the male valve body.

10. A HVAC equipment, characterized in that: The HVAC equipment comprises a chassis and an electric control cabinet as claimed in any one of claims 1 to 8, wherein the chassis is hingedly connected to a hinge in the electric control cabinet; The HVAC equipment also includes a refrigerant circulation pipeline, which is respectively connected to the refrigerant inlet pipe and the refrigerant outlet pipe. The refrigerant circulation pipeline, the refrigerant inlet pipe and the refrigerant outlet pipe jointly define a refrigerant circulation passage.

11. The HVAC equipment according to claim 10, characterized in that: The HVAC equipment also includes a compressor, a condenser, an evaporator and a first throttling device. The refrigerant circulation pipeline includes a first branch, a second branch and a third branch. The two ends of the first branch are respectively connected to the exhaust port of the compressor and the air inlet of the condenser, the two ends of the second branch are respectively connected to the exhaust port of the condenser and the air inlet of the evaporator, the two ends of the third branch are respectively connected to the exhaust port of the evaporator and the air inlet of the compressor, the first throttling device is arranged on the second branch, the second branch between the first throttling device and the exhaust port of the condenser is connected to the refrigerant inlet pipe, and the second branch between the first throttling device and the air inlet of the evaporator is connected to the refrigerant outlet pipe.

12. The HVAC equipment according to claim 11, characterized in that: The HVAC equipment also includes a second throttling device arranged on the refrigerant inlet pipe.

13. The HVAC equipment according to claim 11, characterized in that: The HVAC equipment also includes a one-way valve arranged on the refrigerant outlet pipe, and the one-way valve is used for one-way conduction from the refrigerant outlet in the electric control cabinet to the air inlet of the evaporator.

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