Refrigerant pipe, refrigerant circulation system, and heating and ventilation device

Abstract

A refrigerant pipe (100), a refrigerant circulation system (200), and a heating and ventilation device (1000). The refrigerant pipe (100) comprises a connecting pipe (10) and a sealing member (30). The sealing member (30) is used for sealing the connecting pipe (10). In this way, according to the refrigerant pipe (100), the sealing member (30) seals the connecting pipe (10), and excessive air does not enter the refrigerant pipe (100) or the refrigerant pipe (100) is in an approximately vacuum state, so that in the mounting process of the split heating and ventilation device, the refrigerant pipe (100) does not need to be subjected to vacuuming treatment, the operation is convenient, and the cost is low.

Description

Refrigerant pipes, refrigerant circulation systems and HVAC equipment

[0001] Priority information

[0002] This application claims priority and benefits of patent application No. 202322633240.2 filed with the State Intellectual Property Office of China on September 26, 2023, and the entire text of which is incorporated herein by reference. Technical Field

[0003] The present application relates to the field of HVAC technology, and in particular to a refrigerant pipe, a refrigerant circulation system and HVAC equipment. Background Art

[0004] Currently, during the installation of split-type HVAC equipment, a large amount of air is trapped in the refrigerant pipes connected to the quick connectors. Because air contains large amounts of non-condensable gases such as oxygen, nitrogen, and carbon dioxide, as well as moisture, to prevent air from entering the unit's piping system and mixing with the refrigerant, potentially harming the air source heat pump during operation, the refrigerant pipes must be vacuumed during the installation process, which is inconvenient.

[0005] Utility Model Content

[0006] In view of this, the present invention aims to solve at least one of the problems in the related art to a certain extent. To this end, the purpose of the present application is to provide a refrigerant pipe, a refrigerant circulation system and a heating and ventilation equipment.

[0007] The present application provides a refrigerant pipe, which includes a connecting pipe and a sealing member, wherein the sealing member is used to seal the connecting pipe.

[0008] In certain embodiments, there are multiple sealing members, each sealing both ends of the connecting pipe.

[0009] In certain embodiments, the seal comprises an on-off valve or a throttle valve.

[0010] In certain embodiments, the refrigerant pipe is used to store refrigerant or to circulate refrigerant.

[0011] The present application also provides a refrigerant circulation system comprising the refrigerant pipe and a first heat exchanger as described in any one of the above embodiments, wherein one end of the connecting pipe is connected to the first heat exchanger, and the sealing member seals the other end of the connecting pipe.

[0012] In certain embodiments, the refrigerant circulation system further includes a second heat exchanger, and the connecting pipe is connected to the second heat exchanger via the sealing member.

[0013] In certain embodiments, after the connecting pipe is connected to the second heat exchanger, at least a portion of the refrigerant stored in the connecting pipe is charged into the second heat exchanger.

[0014] In certain embodiments, the connecting pipe is used to circulate refrigerant between the first heat exchanger and the second heat exchanger.

[0015] In certain embodiments, the connecting pipe is connected to the first heat exchanger through the sealing member.

[0016] The present application also provides a HVAC device, which includes the refrigerant circulation system and an indoor unit according to any one of the above embodiments, wherein the first heat exchanger is disposed in the indoor unit.

[0017] In some embodiments, the HVAC equipment further includes a refrigerant bracket and a refrigerant connector, wherein the refrigerant bracket is provided on the indoor unit, and the refrigerant connector is fixed on the refrigerant bracket; the refrigerant connector is used to connect the connecting pipe and the first heat exchanger.

[0018] In some embodiments, a positioning hole is provided on the refrigerant bracket, and the refrigerant joint includes a joint body and a positioning boss, one end of the joint body is passed through the positioning hole and connected to the first heat exchanger, and the other end of the joint body is connected to the connecting pipe; the positioning boss is arranged on the joint body, and a first mounting hole is provided on the positioning boss, and a second mounting hole that cooperates with the first mounting hole is provided on the refrigerant bracket.

[0019] In some embodiments, the joint body is provided with a direction conversion member, and the direction conversion member is used to convert the connection direction between the connecting pipe and the refrigerant joint.

[0020] The refrigerant pipe of the present application includes a connecting pipe and a seal. The connecting pipe is sealed by the seal, so that too much air will not enter the refrigerant pipe or it will be in a near vacuum state. Therefore, during the installation process of the split HVAC equipment, there is no need to vacuum the refrigerant pipe, which is convenient to operate and low in cost.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] FIG1 is a schematic structural diagram of a refrigerant pipe according to certain embodiments of the present application;

[0024] FIG2 is a schematic structural diagram of the connection between a sealing member and a connecting pipe according to certain embodiments of the present application;

[0025] FIG3 is a schematic cross-sectional view of the sealing member and the connecting pipe in FIG2 along line DD after connection;

[0026] FIG4 is a schematic structural diagram of a refrigerant circulation system according to certain embodiments of the present application;

[0027] FIG5 is a schematic structural diagram of a HVAC device according to certain embodiments of the present application;

[0028] FIG6 is a schematic structural diagram of a refrigerant connector provided on a refrigerant bracket in certain embodiments of the present application.

[0029] Figure numbers: HVAC equipment 1000; refrigerant pipe 100; connecting pipe 10; sealing member 30, plug screw 31, valve body 33, valve core 35, dust cap 37; refrigerant circulation system 200, first heat exchanger 210, second heat exchanger 230; indoor unit 300; outdoor unit 400, outdoor unit stop valve 410; refrigerant bracket 500, positioning hole 510, second mounting hole 530; refrigerant connector 600, connector body 610, direction conversion member 611, positioning boss 630, first mounting hole 631. DETAILED DESCRIPTION

[0030] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application.

[0031] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance, or implicitly specifying the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of this application, "plurality" means two or more, unless otherwise expressly and specifically defined.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed" and "connected" should be understood broadly, and may refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection, or mutual communication; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0033] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0034] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application.

[0035] 1 , the present application provides a refrigerant pipe 100 . The refrigerant pipe 100 includes a connecting pipe 10 and a sealing member 30 . The sealing member 30 is used to seal the connecting pipe 10 .

[0036] Specifically, the connecting pipe 10 may be made of metal such as copper or other materials, which are not limited here.

[0037] The number of seals 30 can be one, and one seal 30 seals one end of the connecting pipe 10, while the other end of the connecting pipe 10 can be directly sealed and connected to the heat exchanger, thereby preventing too much air from entering the refrigerant pipe 100. During the installation of the split HVAC equipment, there is no need to vacuum the refrigerant pipe 100, which is convenient to operate and low in cost.

[0038] When there are multiple seals 30, the multiple seals 30 can be sealed at both ends of the connecting pipe 10 respectively to prevent too much air from entering the refrigerant pipe 100, so that during the installation of the split HVAC equipment, there is no need to vacuum the refrigerant pipe 100, which is convenient to operate and low cost.

[0039] Specifically, the number of seals 30 can be 2, 3, 4, 5, 6, or 8, and is not limited thereto. When there are 2 seals 30, one seal 30 can be provided at each end of the connecting pipe 10; when there are 3 seals 30, one seal 30 can be provided at one end of the connecting pipe 10 and two seals 30 can be provided at the other end of the connecting pipe 10; when there are 4 seals 30, two seals 30 can be provided at one end of the connecting pipe 10 and two seals 30 can be provided at the other end of the connecting pipe 10, and so on. It is understood that the more seals 30 provided on the connecting pipe 10, the more air can be prevented from entering the connecting pipe 10, and the more it can ensure that the refrigerant pipe 100 does not enter too much air or is in a near-vacuum state.

[0040] The seal 30 can be arranged on the connecting pipe 10 by welding, so that the seal 30 is firmly arranged on the connecting pipe 10. The seal 30 can also be arranged on the connecting pipe 10 by screwing or clamping, so as to facilitate the installation and removal of the seal 30.

[0041] The sealing member 30 includes an on-off valve or a throttle valve. That is, the refrigerant pipe 100 of the present application can be connected to the outside world through the on-off valve or the throttle valve in the sealing member 30.

[0042] For more details, please refer to Figures 2 and 3 together. The sealing member 30 may include a valve body 33 and a valve core 35. The valve core 35 moves within the valve body 33. The sealing member 30 may also include a screw plug 31, which is used to prevent refrigerant leakage. The material of the screw plug 31 can be plastic, which is not limited here.

[0043] The sealing member 30 can be made of a metal material, that is, the sealing member 30 can be made of, for example, an aluminum alloy, which can reduce the weight of the refrigerant pipe 100 as a whole while ensuring the rigidity of the sealing member 30 .

[0044] In addition, as shown in FIG3 , the seal 30 may further include a dust cap 37 . That is, the end of the connecting pipe 10 of the present application may also be sealed by the dust cap 37 to prevent dust and air from entering the interior of the connecting pipe 10 . In the case where a seal 30 such as a switch valve or a sealing valve is provided at one end of the connecting pipe 10 , the other end of the connecting pipe 10 may be provided with a dust cap 37 when not sealedly connected to the first heat exchanger 210 . When the connecting pipe 10 is not connected to the first heat exchanger 210 , the dust cap 37 seals the interface of the connecting pipe 10 to prevent dust and air from entering the interior of the connecting pipe 10 and facilitates the separate transportation of the refrigerant pipe 100 .

[0045] In this way, the refrigerant pipe 100 of the present application is sealed to the connecting pipe 30 through the seal 30, and not too much air enters the refrigerant pipe 100 or it is in a near vacuum state, so that during the installation process of the split-type HVAC equipment, there is no need to vacuum the refrigerant pipe 100, which is convenient to operate and low in cost.

[0046] In addition, in certain embodiments of the present application, on the basis that the refrigerant pipe 100 is sealed by the sealing member 30 , the refrigerant pipe 100 can also be used to store refrigerant or for refrigerant circulation.

[0047] That is to say, refrigerant may be pre-stored in the refrigerant pipe 100 of the present application, further ensuring that there is less air or almost no air in the refrigerant pipe 100 .

[0048] The refrigerant pipe 100 is used for refrigerant circulation, which means that the refrigerant pipe 100 can be connected to two external devices through the sealing member 30, thereby realizing refrigerant circulation between the two external device ends.

[0049] 4 , the present application further provides a refrigerant circulation system 200 . The refrigerant circulation system 200 includes the refrigerant pipe 100 and the first heat exchanger 210 . One end of the connecting pipe 10 is connected to the first heat exchanger 210 , and the sealing member 30 seals the other end of the connecting pipe 10 .

[0050] One end of the connecting pipe 10 may be fixedly connected or detachably connected to the first heat exchanger 210 when the refrigerant pipe 100 is transported, so that the first heat exchanger 210 is transported together with the connecting pipe 10 .

[0051] One end of the connecting pipe 10 can also be fixedly or detachably connected to the first heat exchanger 210 when the refrigerant pipe 100 is needed. In other words, when transporting the refrigerant pipe 100, both ends of the connecting pipe 10 can be sealed with the seal 30, and then fixedly or detachably connected to the first heat exchanger 210 when the refrigerant pipe 100 is needed.

[0052] It can be understood that one end of the connecting pipe 10 can be fixedly connected to the first heat exchanger 210 or detachably connected together, and the seal 30 seals the other end of the connecting pipe 10, so that it is difficult for too much air to enter the refrigerant pipe 100 or it is in a near vacuum state.

[0053] The first heat exchanger 210 may be provided in the indoor unit of a split water heater or in the indoor unit of an air conditioner, and the two are not limited to each other.

[0054] In this way, one end of the connecting pipe 10 of the refrigerant pipe 100 in the refrigerant circulation system 200 of the present application is sealed by a seal 30, and the other end is connected to the first heat exchanger 210. Too much air will not enter the refrigerant pipe 100 or it will be in an approximate vacuum state, so that during the installation process of the split HVAC equipment, there is no need to vacuum the refrigerant pipe 100, which is convenient to operate and low in cost.

[0055] In certain embodiments of the present application, the refrigerant circulation system 200 further includes a second heat exchanger 230, and the connecting pipe 10 is connected to the second heat exchanger 230 via a seal 30. That is, one end of the connecting pipe 10 can be sealedly connected to the first heat exchanger 210, and the other end of the connecting pipe 10 is connected to the second heat exchanger 230 via the seal 30. This prevents excessive air from entering the refrigerant pipe 100 or prevents the refrigerant pipe 100 from being in a near-vacuum state. This eliminates the need to evacuate the refrigerant pipe 100 during installation of the split-type HVAC equipment, resulting in convenient operation and low cost.

[0056] Specifically, one end of the connecting pipe 10 may be sealed and connected to the first heat exchanger 210 , and the other end of the connecting pipe 10 may be threadedly connected to the second heat exchanger 230 via the sealing member 30 .

[0057] The second heat exchanger 230 can be installed in the outdoor unit of a split water heater, air conditioner, water heater or other HVAC equipment. The structure of the second heat exchanger 230 can be the same as or different from that of the first heat exchanger 210, which is not limited here.

[0058] In one embodiment, after the connecting pipe 10 is connected to the second heat exchanger 230, at least a portion of the refrigerant stored in the connecting pipe 10 is charged into the second heat exchanger 230. That is, after the valve in the sealing member 30 is opened and the connecting pipe 10 is connected to the second heat exchanger 230, at least a portion of the refrigerant stored in the connecting pipe 10 can be charged into the second heat exchanger 230, thereby achieving rapid refrigerant charging of the second heat exchanger 230.

[0059] In another embodiment, the connecting pipe 10 may also be used to circulate refrigerant between the first heat exchanger 210 and the second heat exchanger 230 .

[0060] That is, the refrigerant pipe 100 may include a plurality of refrigerant pipes 100. For example, there may be two refrigerant pipes 100, which are respectively connected between the first heat exchanger 210 and the second heat exchanger 230 to realize refrigerant circulation between the first heat exchanger 210 and the second heat exchanger 230.

[0061] As shown in FIG4 , when refrigerant circulates between the first heat exchanger 210 and the second heat exchanger 230, the two refrigerant pipes 100 can be connected. When the seal 30 of the upper refrigerant pipe 100 in FIG4 is opened, the refrigerant in the connecting pipe 10 of the upper refrigerant pipe 100 flows from the first heat exchanger 210 to the second heat exchanger 230. That is, the refrigerant in the connecting pipe 10 flows in direction A, injecting refrigerant into the second heat exchanger 230. When the seal 30 of the lower refrigerant pipe 100 in FIG4 is opened, the refrigerant in the connecting pipe 10 of the lower refrigerant pipe 100 flows from the second heat exchanger 230 to the first heat exchanger 210. That is, the refrigerant in the connecting pipe 10 flows in direction B. In other words, the refrigerant in the connecting pipe 10 first flows in direction A, injecting refrigerant into the second heat exchanger 230. Then, the refrigerant passes through the second heat exchanger 230 for heat exchange and then flows into the first heat exchanger 210 in direction B through another lower connecting pipe 10. The refrigerant then flows back from the first heat exchanger 210 to the upper connecting pipe 10, thereby realizing the refrigerant circulation between the first heat exchanger 210 and the second heat exchanger 230.

[0062] In certain embodiments of the present application, the connecting pipe 10 can also be connected to the first heat exchanger 210 via a seal 30. That is, both ends of the connecting pipe 10 can be connected to the heat exchangers at either end via seals 30. This ensures that excessive air does not enter the refrigerant pipe 100, or that the refrigerant pipe 100 is in a near-vacuum state. This eliminates the need to evacuate the refrigerant pipe 100 during installation of the split-type HVAC system, resulting in convenient operation and low cost.

[0063] In addition, when it is necessary to use the connecting pipe 10 to fill the second heat exchanger 230 with refrigerant, the connecting pipe 10 can be pre-filled with refrigerant, and the seal 30 connecting the first end of the connecting pipe 10 and the second heat exchanger 210 can be directly opened first, so that the refrigerant pre-existing in the connecting pipe 10 can be used to fill the second heat exchanger 230 with refrigerant. The operation is simple, convenient and fast.

[0064] When it is necessary to use the connecting pipe 10 to realize the refrigerant circulation between the first heat exchanger 210 and the second heat exchanger 230, the seal 30 connecting the first end of the connecting pipe 10 and the second heat exchanger 210 can be directly opened first, and then the seal 30 connecting the second end of the connecting pipe 10 and the first heat exchanger 210 can be opened, so that the refrigerant circulation can be realized between the first heat exchanger 210 and the second heat exchanger 230 through the connecting pipe 10. The operation is simple, convenient and fast.

[0065] Please refer to Figure 5. The present application also provides a HVAC device 1000. The HVAC device 1000 includes the refrigerant circulation system 200 and the indoor unit 300 in the above embodiment. The first heat exchanger 210 is arranged in the indoor unit 300. It should be noted that the structure of the refrigerant circulation system 200 is the same as described above and will not be repeated here. The HVAC equipment 1000 of the present application includes functions such as heating, ventilation, and air conditioning. These functions can be applied to a variety of equipment, for example, it can be applied to equipment including air conditioners, multi-split units, heat pumps, water heaters, swimming pool machines, etc.

[0066] Specifically, the HVAC equipment 1000 may further include an outdoor unit 400. The second heat exchanger 230 is disposed within the outdoor unit 400. The outdoor unit 400 may be provided with an outdoor unit shutoff valve 410. When the outdoor unit 400 is connected to the connecting pipe 10, the outdoor unit 400 may be connected to the seal 30 disposed on the connecting pipe 10 via the outdoor unit shutoff valve 410, thereby connecting the outdoor unit 400 to the connecting pipe 10. It should be noted that the outdoor unit 400 may be a split water heater or a heat exchange device for an air conditioner. The indoor unit 300 includes a water tank, a water coil, or a water-refrigerant heat exchanger, which is not limited here.

[0067] That is, the indoor unit 300 of the present application can be shipped with the connecting pipe 10. When the user installs it on site, he only needs to connect the end of the connecting pipe 10 provided with the seal 30 to the outdoor unit 400. There is no need for vacuuming, and the operation is convenient and simple.

[0068] In this way, the refrigerant pipe 100 used in the HVAC equipment 1000 of the present application includes a connecting pipe 10 and a seal 30. The seal 30 is used to seal the connecting pipe 10. Too much air will not enter the refrigerant pipe 100 or it will be in a near vacuum state. Therefore, during the installation process of the split HVAC equipment, there is no need to vacuum the refrigerant pipe 100, which is convenient to operate and low in cost.

[0069] Please refer to Figures 5 and 6 together. In some embodiments, the HVAC equipment 1000 further includes a refrigerant bracket 500 and a refrigerant connector 600. The refrigerant bracket 500 is disposed on the indoor unit 300. The refrigerant connector 600 is fixed to the refrigerant bracket 500. The refrigerant connector 600 is used to connect the connecting pipe 10 to the first heat exchanger 210. In other words, the present application provides a refrigerant bracket 500 on the indoor unit 300, so that the refrigerant connector 600 can be firmly fixed to the indoor unit 300 through the refrigerant bracket 500, ensuring that the refrigerant connector 600 does not swing in any direction.

[0070] Specifically, the refrigerant bracket 500 can be mounted on the indoor unit 300 by welding or screwing, without limitation. Welding the refrigerant bracket 500 to the indoor unit 300 provides a simple and secure installation. Screwing the refrigerant bracket 500 to the indoor unit 300 facilitates installation and removal.

[0071] The refrigerant bracket 500 and the refrigerant connector 600 may be made of aluminum alloy or other metal materials, without limitation. The refrigerant bracket 500 and the refrigerant connector 600 are made of aluminum alloy, which can reduce the weight of the refrigerant bracket 500 and the refrigerant connector 600 while ensuring the rigidity of the refrigerant bracket 500 and the refrigerant connector 600.

[0072] The refrigerant connector 600 can be connected to the connecting pipe 10 by snapping or threading, so that the refrigerant connector 600 and the connecting pipe 10 are detachably connected, and the connecting pipe 10 can be flexibly replaced and stored separately.

[0073] Please refer to Figure 6 again. In some embodiments, a positioning hole 510 is provided on the refrigerant bracket 500. The refrigerant joint 600 includes a joint body 610 and a positioning boss 630. One end of the joint body 610 is inserted into the positioning hole 510 and connected to the first heat exchanger 210, and the other end of the joint body 610 is connected to the connecting pipe 10. The positioning boss 630 is provided on the joint body 610, and a first mounting hole 631 is provided on the positioning boss 630. The refrigerant bracket 500 is provided with a second mounting hole 530 that cooperates with the first mounting hole 631. The joint body 610 can be cylindrical or in other shapes, which are not limited here. The positioning boss 630 can be a flat circular plate or an elliptical plate, or in other shapes, which are not limited here.

[0074] That is, the present application provides a positioning hole 510 on the refrigerant bracket 500 and a positioning boss 630 on the refrigerant connector 600, so that the positioning boss 630 can cooperate with the positioning hole 510, one end of the connector body 610 is passed through the positioning hole 510 and firmly connected to the first heat exchanger 210, and the other end of the connector body 610 is firmly connected to the connecting pipe 10, thereby ensuring that the refrigerant connector 600 is firmly fixed on the indoor unit 300.

[0075] The refrigerant connector 600 can be fixed to the refrigerant bracket 500 by screw connection, and only one screw needs to be passed through the first mounting hole 631 and the second mounting hole 530 for fixing, which is simple to install.

[0076] In addition, the positioning boss 630 and the connector body 610 can be integrally formed to reduce production costs.

[0077] The number of positioning holes 510 provided on the refrigerant support 500 corresponds to the number of refrigerant connectors 600. For example, when there are two refrigerant connectors 600, the number of positioning holes 510 provided on the refrigerant support 500 is also two.

[0078] 6 , in some embodiments, the connector body 610 is provided with a direction-changing member 611. The direction-changing member 611 is used to change the connection direction between the connecting pipe 10 and the refrigerant connector 600. It should be noted that the direction-changing member 611 can be a welded copper pipe.

[0079] In this way, the present application provides a direction conversion member 611 on the connector body 610, so that the user can adjust the connection direction of the connecting pipe 10 and the refrigerant connector 600 through the direction conversion member 611 according to actual needs, thereby meeting the actual connection requirements of the connecting pipe 10 and the refrigerant connector 600.

[0080] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A refrigerant pipe, characterized in that: The refrigerant pipe includes a connecting pipe and a sealing member, and the sealing member is used for sealing the connecting pipe.

2. The refrigerant pipe according to claim 1, characterized in that: There are multiple sealing members, which seal the two ends of the connecting pipe respectively.

3. The refrigerant pipe according to claim 1, characterized in that: The sealing element comprises an on-off valve or a throttle valve.

4. The refrigerant pipe according to claim 1, characterized in that: The refrigerant pipe is used for storing refrigerant or for refrigerant circulation.

5. A refrigerant circulation system, characterized in that: The refrigerant circulation system comprises the refrigerant pipe as claimed in claims 1 to 4 and a first heat exchanger, one end of the connecting pipe is connected to the first heat exchanger, and the sealing member seals the other end of the connecting pipe.

6. The refrigerant circulation system according to claim 5, characterized in that: The refrigerant circulation system further includes a second heat exchanger, and the connecting pipe is connected to the second heat exchanger through the sealing member.

7. The refrigerant circulation system according to claim 6, characterized in that: After the connecting pipe is connected to the second heat exchanger, at least part of the refrigerant stored in the connecting pipe is charged into the second heat exchanger.

8. The refrigerant circulation system according to claim 6, characterized in that: The connecting pipe is used for circulating refrigerant between the first heat exchanger and the second heat exchanger.

9. The refrigerant circulation system according to claim 6, characterized in that: The connecting pipe is connected to the first heat exchanger through the sealing member.

10. A HVAC equipment, characterized in that: The HVAC equipment includes the refrigerant circulation system and indoor unit described in any one of claims 5 to 9, and the first heat exchanger is arranged in the indoor unit.

11. The HVAC equipment according to claim 10, characterized in that: The HVAC equipment also includes a refrigerant bracket and a refrigerant connector. The refrigerant bracket is arranged on the indoor unit, and the refrigerant connector is fixed on the refrigerant bracket; the refrigerant connector is used to connect the connecting pipe and the first heat exchanger.

12. The HVAC equipment according to claim 11, characterized in that: The refrigerant bracket is provided with a positioning hole, the refrigerant joint comprises a joint body and a positioning boss, one end of the joint body is inserted into the positioning hole and connected to the first heat exchanger, and the other end of the joint body is connected to the connecting pipe; The positioning boss is arranged on the joint body, a first mounting hole is arranged on the positioning boss, and a second mounting hole matching with the first mounting hole is arranged on the refrigerant bracket.

13. The HVAC equipment according to claim 12, characterized in that: The joint body is provided with a direction conversion member, and the direction conversion member is used to convert the connection direction between the connecting pipe and the refrigerant joint.

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