WO2022206463A1

WO2022206463A1 - Connecting pipe assembly and assembling method therefor, stainless steel four-way valve and air-conditioning pipeline system

Info

Publication number: WO2022206463A1
Application number: PCT/CN2022/082131
Authority: WO
Inventors: 张飞; 杜飞龙
Original assignee: 浙江盾安人工环境股份有限公司
Priority date: 2021-03-29
Filing date: 2022-03-22
Publication date: 2022-10-06
Also published as: KR20230160386A; JP2024511699A

Abstract

A connecting pipe assembly, comprising a first connecting pipe (10) having a first connecting section (11); a second connecting pipe (20) having a second connecting section (21), the material of the first connecting pipe (10) being different from that of the second connecting pipe (20) ; a connecting pipe sleeve (30) comprising a first pipe section (31) and a second pipe section (32), the first pipe section (31) and the first connecting section (11) being nested with each other, and the second pipe section (32) and the second connecting section (21) being nested with each other, wherein a first weld seam (33) is provided between the first connecting section (11) and the first pipe section (31), a second weld seam (34) is provided between the second connecting section (21) and the second pipe section (32), the first weld seam (33) is used for accommodating a first solder, the second weld seam (34) is used for accommodating a second solder, and the melting point of the first solder is higher than that of the second solder. The connecting pipe assembly can solve the problem in the related art of large welding difficulty. Also provided are an assembling method for a connecting pipe assembly, a stainless steel four-way valve and an air-conditioning pipeline system.

Description

Takeover assembly and assembly method thereof, stainless steel four-way valve and air conditioning piping system

This application claims priority to the following patent applications:

1. The priority of the patent application submitted to the State Intellectual Property Office of China on March 29, 2021, the application number is 202120628057.1, and the invention name is "take-over assembly and air-conditioning piping system with the same";

2. Submitted to the State Intellectual Property Office of China on April 13, 2021, the application number is 202110395764.5, and the priority of the patent application with the invention name of "take-over assembly, assembly method of take-over assembly and stainless steel four-way valve";

3. Submitted to the State Intellectual Property Office of China on April 13, 2021, the application number is 202120751147.X, and the invention title is the priority of the patent application entitled "Takeover assembly and stainless steel four-way valve with the same".

technical field

The present application relates to the technical field of air conditioners, and in particular, to a nozzle assembly and an assembling method thereof, a stainless steel four-way valve and an air conditioner pipeline system.

Background technique

At present, the air conditioner and the valve need to be connected by a pipe. The valve member has a first connecting pipe, the air conditioner has a second connecting pipe, and the first connecting pipe is connected with the second connecting pipe to realize the connection between the air conditioner and the valve member.

In the related art, the materials of the first connecting pipe and the second connecting pipe are different, and it is necessary to use high-silver solder to weld the first connecting pipe and the second connecting pipe, and the welding is difficult.

SUMMARY OF THE INVENTION

The present application provides a nozzle assembly and an assembling method thereof, a stainless steel four-way valve and an air-conditioning piping system, so as to solve the problem of difficult welding in the related art.

According to an aspect of the present application, a nozzle assembly is provided, the nozzle assembly includes: a first nozzle having a first connecting section; a second nozzle having a second connecting section, the first nozzle and the second nozzle are made of different materials; The pipe sleeve includes a first pipe section and a second pipe section, the first pipe section and the first connecting section are nested with each other, and the second pipe section and the second connecting section are nested with each other; a welding seam, there is a second welding seam between the second connecting section and the second pipe section, the first welding seam is used for accommodating the first solder, the second welding seam is used for accommodating the second solder, and the melting point of the first solder is higher than that of the second welding seam. 2. The melting point of the solder.

Applying the technical solution of the present application, the connecting pipe assembly includes a first connecting pipe, a second connecting pipe and a connecting pipe sleeve. The first pipe section and the first connecting section are nested with each other, the second pipe section and the second connecting section are nested with each other, and the first solder is contained by the first welding seam between the first connecting section and the first pipe section, and the The first solder realizes the connection between the first pipe and the connecting pipe sleeve, the second solder is accommodated by the second welding seam between the second connecting section and the second pipe section, and the second pipe and the connecting pipe sleeve are connected by the second solder. connection, so as to realize the connection of the first take-over and the second take-over. Moreover, since the melting point of the first solder is higher than the melting point of the second solder, the first solder will not melt when the second pipe and the connection sleeve are welded, which can ensure the connection firmness of the first pipe and the connection sleeve.

Further, the material of the connecting pipe sleeve is the same as that of the second connecting pipe. The welding of the connecting pipe sleeve and the second connecting pipe is relatively simple, which is convenient for operation.

Further, the first connecting pipe is made of stainless steel, and the second connecting pipe and the connecting pipe sleeve are made of copper material. The transition is carried out by using the connecting pipe sleeve, which is convenient to realize the connection of the first connecting pipe and the second connecting pipe.

Further, the first pipe section is sleeved on the outside of the first connecting section or the first pipe section is inserted into the inner side of the first connecting section, and the second pipe section is sleeved on the outside of the two connecting sections, so as to realize the connection between the first connecting section and the second connecting section. connect.

Further, the inner diameter of the first nozzle is greater than or equal to the inner diameter of the second nozzle. When the refrigerant flows through the first nozzle and the second nozzle, the flow resistance of the refrigerant is small.

Further, the overlapping length of the first connecting section and the first pipe section is greater than or equal to 3 mm, to ensure that the first connecting section and the first pipe section have a sufficiently long overlapping length to ensure the connection strength between the two.

Further, the end of the first connection segment abuts against the end of the second connection segment. When the refrigerant circulates in the first nozzle and the second nozzle, the circulating state of the refrigerant is stable.

Further, the length of the first nozzle is smaller than the length of the second nozzle, which facilitates the connection of the first nozzle and the second nozzle.

Further, the length of the first pipe section is less than the length of the second pipe section. When the valve body leaves the factory, the first connecting pipe and the connecting pipe sleeve are first welded and connected, and then the second connecting pipe and the connecting pipe sleeve are welded and connected by the customer to complete the connection between the first connecting pipe and the second connecting pipe, which is convenient for customers to operate.

Further, a solder flow groove is provided in the first welding seam, and the solder flow groove is arranged on the first connection section and/or the first pipe section. After the welding ring is melted, it is filled in the solder flow groove, so as to realize the welding connection between the first connection section and the first pipe section.

Further, the first connecting section and the first pipe section are connected by brazing welding, which has the advantages of low cost and simple operation.

Further, the connecting pipe sleeve further includes a reduced diameter section, and the reduced diameter section is located between the first pipe section and the second pipe section. When the connecting pipe is sleeved on the outer side of the first connecting pipe or the second connecting pipe, the reduced diameter section can be used to limit the position and ensure the assembly accuracy.

Further, the first pipe section and the second pipe section are located at the two ends of the connecting pipe sleeve respectively, the first pipe section can be inserted into the first connecting section and welded with the first connecting section, and the second pipe section is located outside the first connecting pipe for Welded with the second pipe, the connecting pipe sleeve also includes a reserved section, the reserved section is located between the first pipe section and the second pipe section, and the two ends of the reserved section are respectively connected with the first pipe section and the second pipe section; When a pipe section is inserted into the first connecting section, the reserved section is located outside the first nozzle so as to form an attachment area between the second pipe section and the first nozzle. Through the setting of the reserved section, when the solder overflows in the direction of the first nozzle, it can first overflow to the reserved section and adhere to it, thereby preventing the solder from flowing into the first nozzle and preventing the solder from entering the reversing valve. A fatal hazard, seriously affecting the normal operation of the reversing valve.

Further, along the axial direction of the connecting sleeve, the length of the reserved section is H ₁ , and H ₁ satisfies the following relation: H ₁ ≥2 mm. By limiting the length of the reserved section H ₁ ≥ 2 mm, the solder during welding of the second pipe section and other nozzles in the refrigeration system is prevented from flowing into the reversing valve in the direction of the first nozzle, resulting in fatal hazards, thereby improving welding reliability.

Further, along the axis direction of the connecting pipe sleeve, the length of the first pipe section is H ₂ , the length of the second pipe section is H ₃ , and H ₁ , H ₂ and H ₃ satisfy the following relationship: H ₁ +H ₃ >H ₂ . Generally speaking, the welding length H ₂ of the first pipe section is usually relatively short. If H ₁ +H ₃ is further smaller than H ₂ , the structural strength cannot be guaranteed when the second pipe section is welded with other pipes in the refrigeration system, and it is not convenient for welding.

Further, the wall thickness of the first pipe section is defined as T ₁ , and the wall thickness of the second pipe section is defined as T ₂ , and T ₁ and T ₂ satisfy the following relationship: T ₁ ≥ T ₂ . Limiting T ₁ ≥ T ₂ can limit the position of other pipes in the refrigeration system when other pipes in the refrigeration system are connected with the connecting pipe sleeve, and also facilitate the installation of the connecting pipe sleeve and other pipes in the refrigeration system.

Further, the connecting pipe sleeve is provided with a limiting structure, and the limiting structure is arranged between the second pipe section and the reserved section, and is used for limiting the second connecting pipe that cooperates with the second pipe section. The setting of the limiting structure is used to prevent other pipes in the refrigeration system from being inserted too deep into the connecting pipe sleeve, thereby damaging the structural strength.

Further, the limiting structure includes a protrusion, the protrusion is arranged on the inner wall of the second pipe section or the reserved section, and the protrusion protrudes from the inner wall of the second pipe section or the reserved section along the radial direction of the connecting pipe sleeve.

Further, the limit structure includes a limit ring, the limit ring is installed on the inner wall of the second pipe section or the reserved section, and a part of the limit ring protrudes from the inner wall of the second pipe section or the reserved section.

Further, the limit structure includes a flared section, and the maximum inner diameter of the flared section is smaller than or equal to the inner diameter of the second pipe section, so as to form a first limit step between the flared section and the second pipe section; the second pipe is inserted into the second pipe section and abuts on the first limit step.

Further, the limit structure includes a counterbore, the counterbore is formed on the inner wall of the second pipe section, and the hole diameter of the counterbore is larger than the inner diameter of the reserved section, so as to form a second limit step between the reserved section and the second pipe section. ; The second connecting pipe is inserted into the second pipe section and abuts on the second limiting step.

According to another aspect of the present application, a method for assembling a nozzle assembly is provided. The method for assembling the nozzle assembly is used to assemble the nozzle assembly provided above. The method for assembling the nozzle assembly includes: step S10, assembling the first connecting pipe sleeve A pipe section and the first connecting section of the first nozzle are nested with each other to obtain the first overlapping length, and the first solder is filled in the interval of the first overlapping length; step S20, the first connecting section and the first connecting section are fused together by the first temperature. The pipe sections are connected by brazing; step S30, the second pipe section of the connecting pipe sleeve is sleeved on the outer side of the second connecting section of the second connecting pipe to obtain a second overlapping length, and the second overlapping length is filled with a second solder; Step S40, using the second temperature to weld the second connecting section and the second pipe section; wherein the first overlapping length is smaller than the second overlapping length, and the first temperature is higher than the second temperature. When the valve body leaves the factory, the connecting pipe sleeve and the first connecting pipe are welded, and the customer only needs to weld the second connecting pipe and the connecting pipe sleeve, and the connecting pipe sleeve is used for transition, which is convenient for welding. Moreover, since the melting point of the first solder is higher than the melting point of the second solder, the first solder will not melt when the second pipe and the connecting pipe are welded, which can ensure the connection firmness of the first pipe and the connecting pipe.

According to yet another aspect of the present application, a stainless steel four-way valve is provided. The stainless steel four-way valve includes the above-mentioned nozzle assembly. The stainless steel four-way valve includes a cylindrical main valve body, and a first valve fixedly connected to the main valve body. For the connection, the main valve body and the first connection are made of the same material, and the hardness of the main valve body and the first connection is greater than that of the second connection. Therefore, the stainless steel four-way valve is also easy to assemble, and can ensure the connection firmness of the first connecting pipe and the connecting pipe sleeve.

According to another aspect of the present application, an air conditioning pipeline system is provided, which includes a pipeline and the above-mentioned connecting pipe assembly, one end of the connecting pipe assembly is connected with the valve, and the other end is connected with the pipeline by welding.

Description of drawings

The accompanying drawings that form a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute improper limitations on the present application. In the attached image:

FIG. 1 shows a schematic structural diagram of a takeover assembly provided according to Embodiment 1 of the present application;

Fig. 2 shows a cross-sectional view of the first nozzle, the second nozzle and the connecting pipe sleeve of the nozzle assembly provided according to the first embodiment of the present application;

FIG. 3 shows a schematic structural diagram of a take-over assembly provided according to Embodiment 1 of the present application;

FIG. 4 shows a schematic structural diagram of a take-over assembly provided according to Embodiment 1 of the present application;

FIG. 5 shows a cross-sectional view of the first nozzle and the connecting pipe sleeve of the nozzle assembly provided according to the first embodiment of the present application;

FIG. 6 shows a schematic structural diagram of a take-over assembly provided according to Embodiment 2 of the present application;

FIG. 7 shows a schematic structural diagram of a reversing valve provided according to Embodiment 3 of the present application;

FIG. 8 shows a schematic structural diagram of a take-over assembly provided according to Embodiment 3 of the present application;

FIG. 9 shows a schematic structural diagram of a take-over assembly provided according to Embodiment 3 of the present application;

FIG. 10 shows a schematic structural diagram of a nozzle assembly provided according to Embodiment 3 of the present application.

Wherein, the above-mentioned drawings include the following reference signs:

10. The first connection; 11. The first connecting section;

20. The second takeover; 21. The second connecting section;

30, connecting pipe sleeve; 31, first pipe section; 32, second pipe section; 33, first weld; 34, second weld; 35, reduced diameter section; 36, reserved section; 37, limit structure; 371, convex; 372, flared section; 3721, first limit step; 373, countersunk hole; 3731, third limit step;

40. Main valve body; 100. Take over assembly; 101. Reversing valve;

L ₁ , the first overlapping length; L ₂ , the second overlapping length;

T ₁ , the wall thickness of the first pipe section; T ₂ , the wall thickness of the second pipe section; H ₁ , the length of the reserved section; H ₂ , the length of the first pipe section; H ₃ , the length of the second pipe section.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

As shown in FIGS. 1 to 5 , Embodiment 1 of the present application provides a nozzle assembly, which includes a first nozzle 10 , a second nozzle 20 and a connecting sleeve 30 . The first nozzle 10 and the second nozzle 20 are connected Material is different. The first connecting pipe 10 has a first connecting section 11, the second connecting pipe 20 has a second connecting section 21, the connecting pipe sleeve 30 includes a first pipe section 31 and a second pipe section 32, the first pipe section 31 and the first connecting section 11 are nested in each other , the second pipe section 32 and the second connecting section 21 are nested in each other. Wherein, there is a first welding seam 33 between the first connecting section 11 and the first pipe section 31, and a second welding seam 34 between the second connecting section 21 and the second pipe section 32, and the first welding seam 33 is used to accommodate the first Solder, the second solder seam 34 is used to accommodate the second solder, and the melting point of the first solder is higher than the melting point of the second solder.

Using the nozzle assembly provided in this embodiment, when connecting the first nozzle 10 and the second nozzle 20, firstly, the first pipe section 31 of the connecting pipe sleeve 30 and the first connecting section 11 of the first nozzle 10 are nested in each other, The first connecting pipe 10 and the connecting pipe sleeve 30 are connected by the first solder, and then the second pipe section 32 of the connecting pipe sleeve 30 and the second connecting section 21 of the second connecting pipe 20 are nested in each other, and the second connecting pipe 20 The connection between the connecting pipe 20 and the connecting pipe sleeve 30 further realizes the connection between the first connecting pipe 10 and the second connecting pipe 20 . When welding the second nozzle 20 and the connecting sleeve 30 , since the melting point of the first solder is higher than the melting point of the second solder, the first solder will not melt, which can ensure the firmness of the connection between the first nozzle 10 and the connecting sleeve 30 .

It should be noted that the first solder refers to the solder in the first welding seam 33 after the welding of the first connecting pipe 10 and the connecting pipe sleeve 30 is completed. Similarly, the second solder refers to the solder in the second welding seam 34 after the welding of the second connecting pipe 20 and the connecting pipe sleeve 30 is completed.

In this embodiment, when welding the first connecting pipe 10 and the connecting pipe sleeve 30, a welding ring is placed at the end of the first connecting section 11, and the welding ring is heated to become liquid and filled in the first welding seam 33, In order to realize the welding of the first connecting pipe 10 and the connecting pipe sleeve 30 .

Wherein, the material of the connecting tube sleeve 30 is the same as that of the second connecting tube 20 . The welding of the connecting tube sleeve 30 and the second connecting tube 20 is relatively simple, which is convenient for operation.

In this embodiment, the first connecting pipe 10 is made of stainless steel, and the second connecting pipe 20 and the connecting pipe sleeve 30 are made of copper material. Using the connecting pipe sleeve 30 for transition is convenient to realize the connection between the first connecting pipe 10 and the second connecting pipe 20 . Specifically, both the second connecting pipe 20 and the connecting pipe sleeve 30 are made of red copper material. Welding of copper and copper, the welding difficulty is low and easy to achieve.

Specifically, the first pipe section 31 is sleeved outside the first connecting section 11 or the first pipe section 31 is inserted into the inner side of the first connecting section 11 , and the second pipe section 32 is sleeved outside the second connecting section 21 .

In this embodiment, the connecting pipe sleeve 30 is sleeved on the outer side of the first pipe 10 and the second pipe 20, and the first pipe 10 does not need to be flared, nor the pipe fittings are processed, and the processing technology is simple. The transition of the inner diameters of the first nozzle 10 and the second nozzle 20 is smooth, which ensures that the refrigerant has a smaller flow resistance when flowing through the first nozzle 10 and the second nozzle 20 .

In this embodiment, the inner diameter of the first nozzle 10 is greater than or equal to the inner diameter of the second nozzle 20 . When the refrigerant flows through the first nozzle 10 and the second nozzle 20, the flow resistance of the refrigerant is small.

In this embodiment, the overlapping length of the first connecting section 11 and the first pipe section 31 is greater than or equal to 3 mm, which ensures that the first connecting section 11 and the first pipe section 31 have a long enough overlap length to ensure the connection between the two. strength. If the overlapping length of the first connecting section 11 and the first pipe section 31 is less than 3 mm, the connection firmness of the first connecting section 11 and the first pipe section 31 cannot be guaranteed.

Specifically, the overlapping lengths of the first connecting section 11 and the first pipe section 31 include, but are not limited to, 4 mm, 5 mm, 6 mm, 7 mm and 8 mm.

It should be noted that the overlapping length of the first connecting section 11 and the first pipe section 31 refers to the overlapping length of the first connecting section 11 and the first pipe section 31 in the axial direction of the connecting pipe sleeve 30 .

As shown in FIG. 2 , the end of the first connection segment 11 abuts against the end of the second connection segment 21 . When the refrigerant circulates in the first nozzle 10 and the second nozzle 20, the circulating state of the refrigerant is stable.

In this embodiment, the length of the first nozzle 10 is smaller than the length of the second nozzle 20 , which facilitates the connection between the first nozzle 10 and the second nozzle 20 .

As shown in FIG. 2 , the length of the first pipe section 31 is smaller than the length of the second pipe section 32 . When the valve body is shipped from the factory, the first connecting pipe 10 and the connecting pipe sleeve 30 are first welded and connected, and then the customer will weld the second connecting pipe 20 and the connecting pipe sleeve 30 to complete the connection between the first connecting pipe 10 and the second connecting pipe 20. Easy for customers to operate.

Wherein, the first welding seam 33 is provided with a solder flow groove, and the solder flow groove is arranged on the outer wall of the first connecting section 11 and/or the inner wall of the first pipe section 31 . After the solder ring is melted, it is filled in the solder flow groove, so as to realize the welding connection between the first connection section 11 and the first pipe section 31 .

In the present embodiment, the solder flow groove is arranged on the outer wall of the first connecting segment 11 to facilitate processing. In other embodiments, the solder flow groove may be provided on the inner wall of the first pipe section 31 , or the solder flow groove may be provided on the outer wall of the first connection section 11 and the inner wall of the first pipe section 31 at the same time.

In this embodiment, the first connecting section 11 and the first pipe section 31 are connected by brazing welding, which has the advantages of low cost and simple operation.

Wherein, the second connecting section 21 and the second pipe section 32 are welded and connected by flame welding.

In this embodiment, the first connecting pipe 10 is the connecting pipe of the four-way reversing valve.

In this embodiment, the melting temperature of the first solder is between 900°C and 1020°C. Specifically, the melting temperature of the first solder is between 930°C and 1000°C, and the melting temperature of the second solder is between 700°C and 830°C.

As shown in FIG. 6 , the second embodiment of the present application provides a nozzle assembly. The difference between the second embodiment and the first embodiment is that in the second embodiment, the connecting sleeve 30 further includes a diameter-reducing section 35 , and the diameter-reducing section 35 Located between the first pipe section 31 and the second pipe section 32 . When the connecting pipe sleeve 30 is sleeved on the outside of the first connecting pipe 10 or the second connecting pipe 20 , the reduced diameter section 35 can be used to limit the position to ensure assembly accuracy.

In this embodiment, the diameter reducing section 35 is used to limit the position of the second nozzle 20. Since the second nozzle 20 has various sizes, when the connecting sleeve 30 is sleeved on the second nozzle 20 with different outer diameters When it is outside, when the second connecting section 21 reaches a predetermined depth, the end of the second connecting section 21 will abut with the reduced diameter section 35 to prompt the user to assemble in place. By arranging the reduced diameter section 35, the connecting sleeve 30 can be adapted to the second nozzle 20 of various sizes, thereby improving the applicability of the nozzle assembly.

Referring to FIGS. 7 to 10 , the third embodiment of the present application provides a nozzle assembly 100 , which is used in an air-conditioning system and is used to connect a valve of the air-conditioning system to a pipeline in the air-conditioning system. Here, the valve can be a reversing valve, an expansion valve and other products. Of course, the nozzle assembly 100 can also be used as an intermediate component between two pipelines to connect two pipelines in the air conditioning system.

Specifically, the nozzle assembly 100 includes a first nozzle 10 and a connecting pipe sleeve 30 , the first nozzle 10 includes a first connecting section 11 , the connecting pipe sleeve 30 includes a first pipe section 31 and a second pipe section 32 , the first pipe section 31 and the second pipe section 31 The pipe sections 32 are located at both ends of the connecting pipe sleeve 30 respectively. The first pipe section 31 can be inserted into the first connecting section 11 and is welded to the first connecting section 11 through the outer wall. The second pipe section 32 is located outside the first connecting pipe 10 and is used for Welded with the second pipe 20; the connecting pipe sleeve 30 also includes a reserved section 36, the reserved section 36 is located between the first pipe section 31 and the second pipe section 32, and the two ends of the reserved section 36 are respectively connected with the first pipe section 31 and the second pipe section 36. The two pipe sections 32 are connected, and when the first pipe section 31 is inserted into the first connecting section 11 , the reserved section 36 is located outside the first nozzle 10 to form an attachment area between the second pipe section 32 and the first nozzle 10 .

It should be noted that when the existing pipelines and various components are welded, there is a risk that solder and welding slag will flow into products such as reversing valves and expansion valves from pipes such as reversing valves and expansion valves, resulting in The product does not work properly, or even fails. However, in the technical solution disclosed in the present application, through the setting of the reserved section 36, when the second pipe 20 is welded in the second pipe section 32, if there is excess solder overflowing in the direction of the first pipe 10, the excess solder It can overflow to the reserved section 36 first and be attached to it. In particular, the inner wall of the first pipe section 31 can also be used as an attachment area. In other words, the attachment area is located on the inner side of the connecting pipe sleeve 30, and the parts other than the second pipe section 32 can be used as the attachment area. The attachment area includes but is not limited to the inner wall of the reserved section 36, and the function of the attachment area is to prevent the above-mentioned excess. The solder flows into the first connecting pipe 10, which prevents the solder from entering the reversing valve, expansion valve and other products and causes fatal hidden dangers, which seriously affects the normal operation of the reversing valve, expansion valve and other products.

It should be noted that this application will take the reversing valve 101 as an example to describe the nozzle assembly 100 .

As shown in FIG. 7 , the reversing valve 101 includes a main valve body 40 and a nozzle assembly 100 , and the nozzle assembly 100 is installed on the main valve body 40 . The reversing valve 101 also includes a slider (not shown in the figure), and the main valve body 40 has a valve cavity (not shown in the figure), and the slider is arranged in the valve cavity and can slide in the valve cavity, so as to realize reversing Reversing of valve 101.

As shown in FIG. 8 to FIG. 10 , preferably, the first pipe 10 is made of stainless steel, and the connecting pipe sleeve 30 is made of copper. Since other pipes in the refrigeration system are made of copper, if stainless steel is used The direct welding of the first pipe 10 of the material and other pipes of copper material will cause the problem that cracks are easily generated in the weld and the fusion zone. Therefore, there is a connecting pipe sleeve 30 that is also a copper pipe in the transition between the stainless steel pipe and the copper pipe. It can solve the problem that cracks are easily generated in the weld and fusion zone, and can also enhance the welding performance and improve the welding reliability.

It should be noted that the welding method of vacuum high temperature brazing is used between the first pipe section 31 and the first connecting section 11, and the welding method of flame brazing is used between the second pipe section 32 and the second connecting pipe 20. Generally speaking , the melting point of vacuum high temperature brazing is 1200℃-1300℃, and the melting point of flame brazing is 200℃-450℃. Since the melting point of flame brazing is lower than that of vacuum high temperature brazing, in this embodiment, the first pipe section is first 31 and the first connecting section 11 are welded, and then the second pipe section 32 and the second connecting pipe 20 are welded, so the temperature required for welding the second pipe section 32 and the second connecting pipe 20 cannot reach the first The welding melting point between the pipe section 31 and the first connecting section 11 will not affect the welding strength between the first pipe section 31 and the first connecting section 11, thereby ensuring welding reliability.

It is worth noting that the welding between the first pipe section 31 and the first connecting section 11 is realized by melting itself, while a welding seam is provided between the second pipe section 32 and the second connecting pipe 20 for placing the solder , the welding between the second pipe section 32 and the second pipe 20 is realized by melting the solder, so the welding between the second pipe section 32 and the second pipe 20 will cause the problem that the solder overflows in the direction of the first pipe 10, and the first pipe section The welding between 31 and the first connecting section 11 does not have this problem; in addition, in terms of technology, generally, the first pipe section 31 and the first connecting section 11 are welded, and then the first pipe is welded. 10 and the connecting pipe sleeve 30 are delivered to the customer as a whole product, and the welding between the second pipe section 32 and the second connecting pipe 20 can be performed by the customer himself, so this welding method is also for the convenience of the customer.

Further, along the axial direction of the connecting sleeve 30 , the length of the reserved section 36 is H ₁ , and H ₁ satisfies the relationship: H ₁ ≥ 2 mm. If the length of the reserved section 36 is too short, the effect of attaching the solder will not be achieved. Therefore, it is necessary to limit the reserved section 36 to a minimum length to prevent the solder from the second pipe section 32 and the second pipe 20 being welded toward the first pipe 10. The directional flow into the reversing valve 101 creates a fatal hazard, thereby improving welding reliability.

Further, along the axial direction of the connecting pipe sleeve 30, the length of the first pipe section 31 is H ₂ , the length of the second pipe section 32 is H ₃ , and H ₁ , H ₂ and H ₃ satisfy the relationship: H ₁ +H ₃ >H ₂ . Generally speaking, in the existing nozzle of the reversing valve 101, the welding length H ₂ of the first pipe section 31 is usually relatively short. If H ₁ +H ₃ is further smaller than H ₂ , the second pipe section 32 and the second nozzle 20 are welded. When the structural strength cannot be guaranteed, the welding length is too short and it is not convenient for welding.

Further, the wall thickness of the first pipe section 31 is defined as T ₁ , and the wall thickness of the second pipe section 32 is defined as T ₂ , T ₁ and T ₂ satisfy the following relationship: T ₁ ≥ T ₂ . When the wall thickness T2 of the _second pipe section 32 is smaller than the wall thickness T1 of the _first pipe section 31, a step can be formed between the first pipe section 31 and the second pipe section 32 to limit the position of the second nozzle 20, And it is also convenient for the installation of the connecting pipe sleeve 30 and the second connecting pipe 20 .

Further, the connecting tube sleeve 30 is provided with a limit structure 37 , and the limit structure 37 is arranged between the reserved section 36 and the second pipe section 32 , and is used to limit the second nozzle 20 that cooperates with the second pipe section 32 . Function: The setting of the limiting structure 37 is used to prevent the second connecting pipe 20 from being inserted too deep into the connecting pipe sleeve 30, thereby damaging the structural strength.

Preferably, the limiting structure 37 is arranged at the connection between the second pipe section 32 and the reserved section 36, because the setting of the limiting structure 37 not only has the function of limiting the position of the second nozzle 20, but also serves as a reminder to customers The function is to prevent the customer from soldering the second nozzle 20 to the reserved section 36 , thereby making the solder adhesion of the reserved section 36 invalid, thereby affecting the normal operation of the reversing valve 101 .

It should be noted that the limiting structure 37 can be arranged on the reserved section 36 or the second pipe section 32. Whether it is provided on the reserved section 36 or the second pipe section 32, it is necessary to ensure that the limiting structure 37 is facing the first pipe. The length H of the reserved section 36 reserved in the 10-direction still satisfies the condition of H≥2mm.

As shown in FIG. 8 , in one embodiment, the limiting structure 37 includes a protrusion 371 , the protrusion 371 is provided on the inner wall of the second pipe section 32 or the reserved section 36 , and the protrusion 371 is along the direction of the connecting pipe sleeve 30 . It protrudes radially inward from the inner wall of the second pipe section 32 or the reserved section 36 . When the second connecting pipe 20 extends into the connecting pipe sleeve 30 and is welded with the second pipe section 32, the end face of the second connecting pipe 20 abuts on the protrusion 371, and the protrusion 371 limits the position of the second connecting pipe 20, preventing the The second pipe 20 is inserted into the connecting pipe sleeve 30 too deeply.

Certainly, when the second nozzle 20 is sleeved on the outer wall of the second pipe section 32 , the protrusions 371 can be arranged to protrude toward the outside of the connecting sleeve 30 for abutting and limiting the second nozzle 20 .

Optionally, in this embodiment, the number of protrusions 371 may be one, two, three or more, and the protrusions 371 may also be set as limit rings, and the limit rings are provided on the first pipe section 31 and the second pipe section 32 , and the limiting ring protrudes toward the inner/outer direction of the connecting pipe sleeve 30 , which can also achieve the purpose of limiting the position of the second connecting pipe 20 , which is not limited here.

As shown in FIG. 9 , in another embodiment, the limiting structure 37 includes a flared section 372 , and the maximum inner diameter of the flared section 372 is less than or equal to the inner diameter of the second pipe section 32 , so that the flared section 372 is connected to the second pipe section 32 between the flared section 372 and the second pipe section 32 . A first limit step 3721 is formed therebetween; the second nozzle 20 is inserted into the second pipe section 32 and abuts against the first limit step 3721 .

Similarly, the limiting structure 37 can also be set as a constriction section (not shown in the figure), a second limiting step (not shown in the figure) is formed between the constriction section and the first pipe section 31, and the second nozzle 20 is sleeved on the The outside of the connecting pipe sleeve 30 is attached to the outer wall of the second pipe section 32 and abuts on the second limiting step, and the second limiting step is used for limiting the position of the second nozzle 20 .

As shown in FIG. 10 , in another embodiment, the limiting structure 37 includes a counterbore 373 , the counterbore 373 is formed on the inner wall of the second pipe section 32 , and the diameter of the counterbore 373 is larger than the inner diameter of the reserved section 36 , so as to A third limit step 3731 is formed between the reserved section 36 and the second pipe section 32 ; the second nozzle 20 is inserted into the second pipe section 32 and abuts against the third limit step 3731 .

It can be understood that the counterbore 373 is formed by cutting the inner wall of the second pipe section 32, thereby cutting off part of the wall thickness of the second pipe section 32. When the wall thickness of the second pipe section 32 is smaller than the thickness of the first pipe section 31 and the reserved section 36 When the wall is thick, a third limit step 3731 will be formed between the reserved section 36 and the second pipe section 32, so that when the second nozzle 20 extends from the connecting pipe sleeve 30, it abuts against the third limit step 3731 , so as to realize the limit, and at the same time, it also saves the processing technology.

The fourth embodiment of the present application provides a method for assembling a take-over assembly. The method for assembling the take-over assembly is used to assemble the above-mentioned take-over assembly. The method for assembling the take-over assembly includes:

Step S10, nesting the first pipe section 31 of the connecting tube sleeve 30 and the first connecting section 11 of the first nozzle 10 to obtain a first overlapping length, and filling the interval of the first overlapping length L1 with a first solder;

Step S20, using the first temperature to connect the first connecting section 11 and the first pipe section 31 by brazing;

Step S30, sleeve the second pipe section 32 of the connecting pipe sleeve 30 on the outer side of the second connecting section 21 of the second connecting pipe 20 to obtain a second overlapping length L2, and fill the second overlapping length L2 with a second solder;

In step S40, the second connecting section 21 and the second pipe section 32 are welded and connected by using the second temperature.

Wherein, the first overlapping length L1 is smaller than the second overlapping length L2, and the first temperature is higher than the second temperature.

The fifth embodiment of the present application provides a stainless steel four-way valve, the stainless steel four-way valve includes the above-mentioned connecting pipe assembly, the stainless steel four-way valve includes a cylindrical main valve body 40 , and a first valve fixedly connected to the main valve body 40 . The material of the nozzle 10 , the main valve body 40 and the first nozzle 10 are the same, and the hardness of the main valve body 40 and the first nozzle 10 is greater than that of the second nozzle 20 .

With the device provided in the embodiment, after the stainless steel reversing valve is delivered to the customer, it needs to be welded with the copper pipe (the second pipe 20 ) of the air conditioning system, but the stainless steel pipe (the first pipe 10 ) and the copper pipe are not easily welded, so Before leaving the factory, a copper sleeve (connecting sleeve 30) is put on the stainless steel pipe port, so that customers only need to face the copper pipe and copper pipe welding. Moreover, since the melting point of the first solder is higher than the melting point of the second solder, the first solder will not melt when the copper tube and the copper sleeve are welded, which can ensure the firmness of the connection between the stainless steel tube and the copper sleeve.

Embodiment 6 of the present application provides an air conditioning pipeline system (not shown), including a pipeline (not shown) and a nozzle assembly 100. One end of the nozzle assembly 100 is connected to the valve, and the other end is connected to the pipeline by welding.

The air conditioning piping system also has the advantages of the nozzle assembly 100 described above.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

A take-over assembly, characterized in that the take-over assembly comprises:

a first nozzle (10) having a first connecting section (11);

The second nozzle (20) has a second connecting section (21), and the first nozzle (10) and the second nozzle (20) are made of different materials;

A connecting pipe sleeve (30) includes a first pipe section (31) and a second pipe section (32), the first pipe section (31) and the first connecting section (11) are nested with each other, and the second pipe section ( 32) nesting with the second connecting segment (21);

Wherein, there is a first welding seam (33) between the first connecting section (11) and the first pipe section (31), and the second connecting section (21) and the second pipe section (32) have a first welding seam (33). There is a second welding seam (34) in between, the first welding seam (33) is used for accommodating the first solder, the second welding seam (34) is used for accommodating the second solder, and the first solder has a high melting point at the melting point of the second solder.
The nozzle assembly according to claim 1, characterized in that, the material of the connecting pipe sleeve (30) is the same as the material of the second nozzle (20).
The nozzle assembly according to claim 1, wherein the first nozzle (10) is made of stainless steel, and the second nozzle (20) and the connecting sleeve (30) are made of copper to make.
The nozzle assembly according to claim 1, wherein the first pipe section (31) is sleeved on the outer side of the first connecting section (11) or the first pipe section (31) is inserted into the first pipe section (31) Inside a connecting section (11), the second pipe section (32) is sleeved on the outside of the two connecting sections (21).
The nozzle assembly according to claim 1, wherein the inner diameter of the first nozzle (10) is greater than or equal to the inner diameter of the second nozzle (20).
The nozzle assembly according to claim 1, wherein the overlapping length of the first connecting section (11) and the first pipe section (31) is greater than or equal to 3 mm.
The nozzle assembly according to claim 1, characterized in that the end of the first connection segment (11) abuts against the end of the second connection segment (21).
The nozzle assembly according to claim 1, wherein the length of the first nozzle (10) is smaller than the length of the second nozzle (20).
The nozzle assembly according to claim 1, wherein the length of the first pipe section (31) is smaller than the length of the second pipe section (32).
The nozzle assembly according to claim 1, characterized in that, a solder flow groove is provided in the first welding seam (33), and the solder flow groove is arranged in the first connection section (11) and/or the on the first pipe section (31).
The nozzle assembly according to claim 1, characterized in that, the first connecting section (11) and the first pipe section (31) are connected by brazing welding.
The nozzle assembly according to claim 1, characterized in that, the connecting pipe sleeve (30) further comprises a reduced diameter section (35), and the reduced diameter section (35) is located between the first pipe section (31) and the between the second pipe sections (32).
The nozzle assembly according to claim 1, characterized in that the first pipe section (31) and the second pipe section (32) are located at both ends of the connecting pipe sleeve (30), respectively, and the first pipe section ( 31) Can be inserted into the first connecting section (11) and connected with the first connecting section (11) by welding, the second pipe section (32) is located outside the first connecting pipe (10), and is connected with the first connecting section (11). For welding with the second pipe (20), the connecting pipe sleeve (30) further comprises a reserved section (36), and the reserved section (36) is located between the first pipe section (31) and the first pipe section (31) and the first pipe section (31). Between the two pipe sections (32), both ends of the reserved section (36) are respectively connected with the first pipe section (31) and the second pipe section (32); and, in the first pipe section (31) ) is inserted into the first connecting section (11), the reserved section (36) is located outside the first connecting piece (10), so as to connect the second connecting piece (32) and the first connecting piece An attachment area is formed between (10).
The nozzle assembly according to claim 13, characterized in that, along the axial direction of the connecting sleeve (30), the length of the reserved section (36) is H 1 , and H 1 satisfies the following relational expression:

H 1 ≥ 2mm.
The nozzle assembly according to claim 14, characterized in that, along the axial direction of the connecting pipe sleeve (30), the length of the first pipe section (31) is H 2 , and the second pipe section (32) The length of is H 3 , and H 1 , H 2 and H 3 satisfy the following relation:

H 1 +H 3 >H 2 .
The nozzle assembly according to claim 13, wherein the wall thickness of the first pipe section (31) is defined as T 1 , and the wall thickness of the second pipe section (32) is defined as T 2 , T 1 and T 2 satisfy the following relation:

T 1 ≥ T 2 .
The nozzle assembly according to claim 13, characterized in that a limiting structure (37) is provided on the connecting pipe sleeve (30), and the limiting structure (37) is provided on the second pipe section (32) and the Between the reserved sections (36), the second pipe (20) matched with the second pipe section (32) is used to limit the position.
The nozzle assembly according to claim 17, characterized in that the limiting structure (37) comprises a protrusion (371), and the protrusion (371) is provided on the second pipe section (32) or the preset on the inner wall of the reserved section (36), and the protrusion (371) protrudes beyond the second pipe section (32) or the reserved section (36) along the radial direction of the connecting pipe sleeve (30). inner wall.
The nozzle assembly according to claim 17, wherein the limiting structure (37) comprises a limiting ring, and the limiting ring is installed on the second pipe section (32) or the reserved section (36) ), and part of the limiting ring protrudes from the inner wall of the second pipe section (32) or the reserved section (36).
The nozzle assembly according to claim 17, wherein the limiting structure (37) comprises a flared section (372), and the maximum inner diameter of the flared section (372) is smaller than or equal to the second pipe section (372). 32) an inner diameter to form a first limiting step (3721) between the flared section (372) and the second pipe section (32);

The second pipe (20) is inserted into the second pipe section (32) and abuts on the first limiting step (3721).
The nozzle assembly according to claim 17, wherein the limiting structure (37) comprises a counterbore (373), and the counterbore (373) is formed on the inner wall of the second pipe section (32), And the hole diameter of the counterbore (373) is larger than the inner diameter of the reserved section (36), so as to form a second limit step (36) between the reserved section (36) and the second pipe section (32). 3731);

The second pipe (20) is inserted into the second pipe section (32) and abuts on the second limiting step (3731).
A method for assembling a nozzle assembly, characterized in that the method for assembling the nozzle assembly is used to assemble the nozzle assembly described in any one of claims 1 to 12, and the method for assembling the nozzle assembly includes:

Step S10, nesting the first pipe section (31) of the connecting pipe sleeve (30) and the first connecting section (11) of the first nozzle (10) to obtain a first overlapping length, and at the first overlapping length Fill in the first solder in the interval;

Step S20, using the first temperature to connect the first connection section (11) and the first pipe section (31) by brazing;

Step S30, the second pipe section (32) of the connecting pipe sleeve (30) is sleeved on the outside of the second connecting section (21) of the second connecting pipe (20) to obtain a second overlapping length, and the The interval of two overlapping lengths is filled with the second solder;

Step S40, using the second temperature to weld the second connecting section (21) and the second pipe section (32);

Wherein, the first overlapping length is shorter than the second overlapping length, and the first temperature is higher than the second temperature.
A stainless steel four-way valve, characterized in that the stainless steel four-way valve comprises the nozzle assembly according to any one of claims 1 to 12, the stainless steel four-way valve comprises a cylindrical main valve body (40), and A first pipe (10) fixedly connected to the main valve body (40), the main valve body (40) and the first pipe (10) are made of the same material, and the main valve body (40) And the hardness of the first pipe (10) is greater than the hardness of the second pipe (20).
An air-conditioning pipeline system, characterized in that it comprises a pipeline and the nozzle assembly according to any one of claims 1 to 21, one end of the nozzle assembly is connected to a valve, and the other end is connected to the pipeline by welding.