Outdoor unit, single-temperature-zone cold chain split unit system, and double-temperature-zone cold chain split unit system

Abstract

The utility model discloses an outdoor unit, single temperature zone cold chain split machine system and double temperature zone cold chain split machine system relates to cold chain transportation refrigeration unit technical field, the outdoor unit provided by the utility model includes: outdoor unit main part, first connecting pipe, fluorine injection nozzle, the refrigerant is precharged in the indoor unit main part, the first connecting pipe is connected with the outdoor unit main part, and the refrigerant valve is arranged in the first connecting pipe to control the refrigerant flow or disconnect, the fluorine injection nozzle is arranged in the first connecting pipe and is located the side of the refrigerant valve deviating from the outdoor unit main part to be used for drawing out air or filling refrigerant. Such setting, through the optimization improvement to outdoor unit connection mode and refrigerant filling mode, effectively avoids the refrigerant filling operation under the complex situation of the scene environment, improves its on -the -spot installation convenience and stability.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration units for cold chain transportation, and in particular to an outdoor unit, a single-temperature zone cold chain split unit system, and a dual-temperature zone cold chain split unit system. Background Technology

[0002] Currently, all split-type refrigeration units on the market require vacuuming and refrigerant charging during on-site installation. These chargings are generally not done by the original manufacturer. Furthermore, as the usage time increases, it is necessary to add refrigerant to the split-type refrigeration units to ensure their normal operation.

[0003] In the process of realizing this invention, the inventors discovered that the prior art has at least the following problems: split-type refrigeration units are unstable in terms of equipment, personnel, and site during actual operation, and high-pressure refrigerants are dangerous, requiring high quality and site requirements from customers for installation.

[0004] Therefore, how to improve the convenience and stability of on-site installation of cold chain split machines is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide an outdoor unit that can improve the convenience and stability of on-site installation of the cold chain split unit. Furthermore, this utility model also provides a single-temperature zone cold chain split unit system including the aforementioned outdoor unit and a dual-temperature zone cold chain split unit system including the aforementioned outdoor unit.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] The first aspect of this utility model provides an outdoor unit, comprising:

[0008] The outdoor unit is pre-charged with refrigerant.

[0009] The first connecting pipe connects to the main body of the outdoor unit;

[0010] A refrigerant valve is installed on the first connecting pipe to control the flow or disconnection of refrigerant.

[0011] The refrigerant charging nozzle is located on the first connecting pipe and on the side of the refrigerant valve away from the outdoor unit body, for use in extracting air or charging refrigerant.

[0012] In one possible implementation, the first connecting pipe includes a first pipe and a second pipe, both of which have detachable plugs for sealing the ports at their ends away from the outdoor unit body.

[0013] In one possible implementation, the refrigerant valve includes a first refrigerant valve and a second refrigerant valve, and both the first and second refrigerant valves can be ball valves.

[0014] In one possible implementation, the refrigerant charging nozzle is specifically a three-way valve, which includes a first port, a second port, and a third port. The first port and the second port are connected to a first pipe or a second pipe. The first port and the second port are in a straight-through state. The third port is used for vacuuming or charging refrigerant. When the outdoor unit is operating normally, the third port is in a closed state.

[0015] In one possible implementation, the refrigerant charging nozzle is a four-way valve, which includes a first port, a second port, a third port, and a fourth port. The first port and the second port are connected to a first pipe or a second pipe, and the first port and the second port are in a straight-through state. The third port is used to extract air when installing the outdoor unit, and the fourth port is used to charge the outdoor unit with refrigerant. When the outdoor unit is operating normally, both the third port and the fourth port are in a closed state.

[0016] The second aspect of this utility model provides a single-temperature zone cold chain split air conditioner system, including an outdoor unit as described above, and an indoor unit. The indoor unit is connected to a third pipe and a fourth pipe, and the third pipe and the fourth pipe are used to connect to a first connecting pipe so that the outdoor unit and the indoor unit form a closed loop.

[0017] In one possible implementation, the third pipe is used to connect with the first pipe, and the fourth pipe is used to connect with the second pipe.

[0018] The ends of the third and fourth pipes are detachably fitted with plugs for sealing the ports.

[0019] In one possible implementation, both the third and fourth pipes can be flexible hoses.

[0020] The third aspect of this utility model provides a dual-temperature zone cold chain split air conditioner system, including an outdoor unit as described above, and also including a first indoor unit and a second indoor unit, wherein the first indoor unit is integrated into the outdoor unit body.

[0021] In one possible implementation, the second indoor unit is connected to a third pipe and a fourth pipe, and the third pipe and the fourth pipe are used to connect to the first connecting pipe so that the outdoor unit body and the integrated first indoor unit form a closed loop with the second indoor unit.

[0022] Compared with the prior art, the technical solution provided by this utility model has at least the following beneficial effects:

[0023] The outdoor unit body provided by this utility model is pre-charged with refrigerant. To prevent refrigerant leakage, a refrigerant valve that can be opened or closed is installed on the first connecting pipe connected to the outdoor unit body. Before the outdoor unit is installed, the refrigerant valve is in the closed state, so the refrigerant is sealed in the circulation pipe inside the outdoor unit body. After the outdoor unit is installed and the indoor unit connected to the outdoor unit body is ready to be charged with refrigerant, the refrigerant valve can be opened to complete the refrigerant injection. In this way, there is no need to charge the refrigerant on-site during the installation of the outdoor unit, effectively avoiding refrigerant charging operations in complex on-site environments. This can effectively ensure the cleanliness of the refrigeration system, reduce the equipment required for refrigerant charging, reduce installation costs, and eliminate the need for certain dangerous operations during the whole vehicle installation process, ensuring safety. In addition, this setting greatly reduces the skill requirements of the operators and has a higher compatibility with the installation site.

[0024] In addition, the refrigerant charging nozzle allows for vacuuming of the piping on the other side during outdoor unit installation, enabling refrigerant to quickly fill the entire circulation system after installation. Furthermore, refrigerant can be added to the circulation system after the outdoor unit has been operating for a period of time. This design not only improves the installation efficiency of the outdoor unit but also avoids the need for disassembly when adding refrigerant, making refrigerant replenishment after installation much easier. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the single-temperature zone cold chain split machine system provided in this embodiment of the present invention before installation;

[0027] Figure 2 This is a schematic diagram of the single-temperature zone cold chain split machine system after installation, provided in this embodiment of the utility model.

[0028] Figure 3 This is a schematic diagram of the dual-temperature zone cold chain split machine system provided in this embodiment of the present invention before installation;

[0029] Figure 4 This is a schematic diagram of the dual-temperature zone cold chain split machine system provided in this embodiment of the present invention after installation.

[0030] in:

[0031] 100 - Outdoor unit body, 110 - First pipe, 120 - Second pipe, 130 - First refrigerant valve, 140 - Second refrigerant valve, 150 - Refrigerant charging nozzle;

[0032] 200-plug;

[0033] 300 - Indoor unit, 310 - First indoor unit, 320 - Second indoor unit, 330 - Third duct, 340 - Fourth duct. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left" and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the indicated position or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of this utility model.

[0037] The purpose of this invention is to provide an outdoor unit that can improve the convenience and stability of on-site installation of cold chain split units.

[0038] To achieve the above objectives, the present invention provides the following technical solution:

[0039] Please see Figure 1 and Figure 2This embodiment provides an outdoor unit, including: an outdoor unit body 100, a first connecting pipe, and a refrigerant charging nozzle 150; the outdoor unit body 100 is pre-charged with refrigerant; the first connecting pipe is connected to the outdoor unit body 100, enabling pre-charging and refrigerant flow; a refrigerant valve is disposed on the first connecting pipe to control the flow or disconnection of refrigerant; the refrigerant charging nozzle 150 is disposed on the first connecting pipe and located on the side of the refrigerant valve away from the outdoor unit body 100, for extracting air or charging refrigerant. It can be understood that during the connection of the outdoor unit and the indoor unit, air can be extracted from the indoor unit through the refrigerant charging nozzle 150, allowing the indoor unit to reach the vacuum conditions required for refrigerant charging, so that after the refrigerant valve opens, the refrigerant pre-charged in the outdoor unit body can circulate to the indoor unit.

[0040] Specifically, in this embodiment, the outdoor unit needs to be connected to the indoor unit 300 during installation. The outdoor unit body 100 may include the outer shell structure, compressor, outdoor fan, outdoor heat exchanger, economizer, throttling element and other components required for the refrigeration unit, as well as the electronic control system. Its internal structure can refer to the prior art, which will not be described in detail here. There is a pipeline for refrigerant circulation inside the outdoor unit body 100. The first connecting pipe in this embodiment can be connected to this pipeline. The first connecting pipe can be connected to the indoor unit 300 when the outdoor unit is installed to form a closed loop.

[0041] Furthermore, as shown in the attached drawings, the refrigerant charging nozzle 150 in this embodiment is located on the right side of the refrigerant valve. In this way, when the outdoor unit body 100 and the indoor unit 300 are connected to form a closed loop, the piping on one side of the indoor unit 300 can be evacuated until the standard vacuum level is reached. Then, the refrigerant valve is opened, and the refrigerant pre-charged inside the outdoor unit body 100 will smoothly and quickly fill the entire closed loop. Moreover, after the outdoor unit is installed and has been working for a period of time, refrigerant can be added to the entire closed loop through the refrigerant charging nozzle 150. This arrangement allows for the outdoor unit to be recharged without disassembling it, thus effectively ensuring the service life of the outdoor unit.

[0042] In this embodiment, the outdoor unit body 100 is pre-charged with sufficient refrigerant at the factory. To prevent refrigerant leakage, a refrigerant valve that can be opened or closed is installed on the first connecting pipe connected to the outdoor unit body 100. The refrigerant valve is closed before the outdoor unit is installed, thus sealing the refrigerant within the flow pipe (or pipeline / flow path) inside the outdoor unit body 100. After the outdoor unit is installed and the indoor unit 300 connected to the outdoor unit body 100 is ready to be charged with refrigerant, the refrigerant valve can be opened to complete the refrigerant injection. In this way, there is no need to charge the refrigerant on-site during the installation of the outdoor unit, effectively avoiding refrigerant charging operations in complex on-site environments. This effectively ensures the cleanliness of the refrigeration system, reduces the equipment required for refrigerant charging, lowers installation costs, and eliminates the need for potentially dangerous operations during the vehicle installation process, ensuring safety. Furthermore, this setup greatly reduces the skill requirements for operators and has higher compatibility with installation sites.

[0043] In addition, the refrigerant charging nozzle 150 allows for pre-charging of refrigerant into the outdoor unit body 100. It also allows for vacuuming of the piping on the other side during outdoor unit installation, ensuring refrigerant quickly fills the entire circulation system after installation. Furthermore, refrigerant can be added to the circulation system after the outdoor unit has been operating for a period of time. This design not only improves the installation efficiency of the outdoor unit but also avoids the need for disassembly when adding refrigerant, making refrigerant replenishment after installation more convenient.

[0044] In one possible implementation, the first connecting pipe includes a first pipe 110 and a second pipe 120, both of which have detachable plugs 200 for sealing the ports inserted at their ends away from the outdoor unit body 100.

[0045] In this embodiment, the first connecting pipe has two parts, namely the first pipe 110 and the second pipe 120, and both are respectively connected to the refrigerant inlet and outlet of the outdoor unit body 100, as detailed below. Figure 1 and Figure 2As shown. Understandably, during transportation of the outdoor unit 100, if the ports of its first pipe 110 and second pipe 120 are not properly protected, dust or impurities will inevitably enter the first pipe 110 and second pipe 120. After the outdoor unit is installed and refrigerant is introduced, these impurities or dust will be introduced into the circulation piping connected to the outdoor unit, contaminating the entire refrigeration system. This contamination and dust can damage components of the outdoor unit 100 and indoor unit 300 during circulation, affecting their lifespan. Therefore, plugs 200 are installed at the ports of the first pipe 110 and second pipe 120. The plugs 200 are only removed when connecting the first pipe 110 and second pipe 120 to the indoor unit 300, effectively ensuring the cleanliness of the refrigeration system.

[0046] Furthermore, the refrigerant valves include a first refrigerant valve 130 and a second refrigerant valve 140, which are respectively installed on the first pipe 110 and the second pipe 120. In this way, by simultaneously closing the first refrigerant valve 130 and the second refrigerant valve 140, the pre-charged refrigerant can be sealed inside the outdoor unit body 100. In addition, both the first refrigerant valve 130 and the second refrigerant valve 140 can be ball valves. Of course, other types of valve bodies can also be selected according to the actual situation, which will not be specifically limited here.

[0047] In one embodiment, the refrigerant charging nozzle 150 is specifically a three-way valve, which includes a first port, a second port and a third port. The first port and the second port are connected to the first pipe 110 or the second pipe 120. The first port and the second port are in a straight-through state. The third port is used for vacuuming or charging refrigerant. When the outdoor unit is operating normally, the third port is in a closed state.

[0048] In other words, the first and second ports of the refrigerant inlet 150 are connected to the first pipe 110 or the second pipe 120, while the third port is connected to the first and second ports. In this embodiment, the first and second ports are always connected, while the third port is only opened when vacuuming or refrigerant charging is required. This setting makes it convenient for operators to carry out the operation.

[0049] In another embodiment, the refrigerant charging nozzle 150 is a four-way valve, which includes a first port, a second port, a third port and a fourth port. The first port and the second port are connected to the first pipe 110 or the second pipe 120. The first port and the second port are in a straight-through state. The third port is used to extract air when installing the outdoor unit. The fourth port is used to charge the outdoor unit with refrigerant. When the outdoor unit is running normally, both the third port and the fourth port are in a closed state.

[0050] Understandably, in this embodiment, the refrigerant charging nozzle 150 is installed on the first pipe 110 or the second pipe 120, and it has two functions: one is to evacuate the circulation pipe installed on the outdoor unit, and the other is to charge the circulation pipe with refrigerant. Therefore, in this embodiment, the refrigerant charging nozzle 150 is set as a four-way valve, wherein the first port and the second port are connected to the first pipe 110 or the second pipe 120, but the third port and the fourth port respectively undertake the two functions of the refrigerant charging nozzle 150.

[0051] The second aspect of this utility model provides a single-temperature zone cold chain split air conditioner system, including an outdoor unit as described above, and an indoor unit 300. The indoor unit 300 is connected to a third pipe 330 and a fourth pipe 340, and the third pipe 330 and the fourth pipe 340 are used to connect with a first connecting pipe so that the outdoor unit and the indoor unit 300 form a closed loop.

[0052] Specifically, such as Figure 1 and Figure 2 As shown, the single-zone cold chain split air conditioner system includes the outdoor unit mentioned above and one indoor unit 300. The indoor unit 300 may include an indoor casing, an indoor fan, an indoor heat exchanger, and a temperature sensor. Its structure can refer to existing technology and will not be elaborated here. The indoor unit 300 is connected to a third pipe 330 and a fourth pipe 340, which are respectively connected to both ends of the internal piping of the indoor unit 300. When assembling the single-zone cold chain split air conditioner system, it is only necessary to connect the third pipe 330 and the fourth pipe 340 to the first connecting pipe, thus completing the assembly of the outdoor unit and the indoor unit 300. The two will form a closed loop for refrigerant circulation. In this way, since the outdoor unit body 100 is pre-charged with sufficient refrigerant, it is not necessary to inject refrigerant on-site when assembling the single-zone cold chain split air conditioner system, eliminating the need for refrigerant charging equipment, reducing installation costs, and eliminating the need for certain dangerous operations during installation, ensuring safety. Moreover, the skill requirements for operators are greatly reduced, and the compatibility with installation sites is also higher.

[0053] In one possible implementation, the third pipe 330 is used to communicate with the first pipe 110, and the fourth pipe 340 is used to communicate with the second pipe 120; both the ends of the third pipe 330 and the fourth pipe 340 are detachably fitted with plugs 200 for sealing the ports.

[0054] Specifically, in this embodiment, the third pipe 330 is used to connect with the first pipe 110, and the fourth pipe 340 is used to connect with the second pipe 120; of course, the connection method can be adjusted according to the actual situation; in addition, it is understood that by inserting plugs 200 into the ports of the third pipe 330 and the fourth pipe 340, and only removing them during installation, it can be ensured that the third pipe 330 and the fourth pipe 340 of the outdoor unit will not be contaminated by impurities and dust in the external environment during transportation, thus ensuring the cleanliness of the refrigeration system.

[0055] In one possible implementation, both the third pipe 330 and the fourth pipe 340 can be flexible hoses.

[0056] In summary, the operation of the single-temperature zone cold chain split air conditioner system provided by this utility model is as follows: First, the outdoor unit 100 in its initial state is charged with sufficient refrigerant. At this time, the first refrigerant valve 130 and the second refrigerant valve 140 are closed, and there is no refrigerant in the pipeline from the refrigerant valve to the plug 200, and the plug 200 is not opened. Second, during installation, the plug 200 is opened, and the first pipeline 110 and the second pipeline 120 are connected to the third pipeline 330 and the fourth pipeline 340, respectively. Third, a vacuum is evacuated on one side of the indoor unit 300 through the refrigerant charging nozzle 150 to achieve the standard vacuum degree. Fourth, the first refrigerant valve 130 and the second refrigerant valve 140 are opened, at which time the refrigerant in the outdoor unit will flow into the indoor unit 300 and fill the entire complete circuit. Finally, the unit is started to operate for cooling.

[0057] The third aspect of this utility model provides a dual-temperature zone cold chain split air conditioner system, including the outdoor unit mentioned above, and also including a first indoor unit 310 and a second indoor unit 320, wherein the first indoor unit 310 can be integrated into the outdoor unit body 100.

[0058] Furthermore, the second indoor unit 320 is connected to a third pipe 330 and a fourth pipe 340, and the third pipe 330 and the fourth pipe 340 are used to connect with the first connecting pipe so that the integrated outdoor unit and the first indoor unit 310 form a closed loop with the second indoor unit 320.

[0059] Specifically, such as Figure 3 and Figure 4As shown, in this embodiment, the dual-zone cold chain split system includes the outdoor unit mentioned above and two indoor units 300, namely the first indoor unit 310 and the second indoor unit 320. It should be noted that the first indoor unit 310 is integrated with the outdoor unit body 100 into a single structure, that is, the internal pipes of the two are connected together. Therefore, the refrigerant pre-charged in the outdoor unit body 100 is sealed in the pipe connecting the outdoor unit and the first indoor unit 310 by the first refrigerant valve 130 and the second refrigerant valve 140. The second outdoor unit is the same as the indoor unit 300 in the single-zone cold chain split system. With this configuration, the operation mode of the dual-zone cold chain split system is the same as that of the single-zone cold chain split system. The only difference is that the outdoor unit and the first indoor unit 310 in the dual-zone cold chain split system are equivalent to the outdoor unit in the single-zone cold chain split system.

[0060] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0061] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0062] The embodiments provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. An outdoor unit, characterized in that, include: The outdoor unit body (100) is pre-charged with refrigerant; The first connecting pipe is connected to the outdoor unit body (100); A refrigerant valve is provided on the first connecting pipe to control the flow or disconnection of the refrigerant; A refrigerant charging nozzle (150) is provided on the first connecting pipe and located on the side of the refrigerant valve away from the outdoor unit body (100) for extracting air or charging refrigerant.

2. The outdoor unit according to claim 1, characterized by The first connecting pipe includes a first pipe (110) and a second pipe (120), and the ends of the first pipe (110) and the second pipe (120) away from the outdoor unit body (100) are detachably fitted with plugs (200) for sealing the ports.

3. The outdoor unit according to claim 2, characterized by The refrigerant valve includes a first refrigerant valve (130) and a second refrigerant valve (140), and both the first refrigerant valve (130) and the second refrigerant valve (140) can be ball valves.

4. The outdoor unit according to claim 2, characterized in that, The refrigerant inlet (150) is specifically a three-way valve, which includes a first port, a second port and a third port. The first port and the second port are connected to the first pipe (110) or the second pipe (120). The first port and the second port are in a straight-through state. The third port is used for vacuuming or charging refrigerant. When the outdoor unit is running normally, the third port is in a closed state.

5. The outdoor unit according to claim 2, characterized in that, The refrigerant charging nozzle (150) is a four-way connector, which includes a first port, a second port, a third port and a fourth port. The first port and the second port are connected to the first pipe (110) or the second pipe (120). The first port and the second port are in a straight-through state. The third port is used to extract air when the outdoor unit is installed. The fourth port is used to charge the outdoor unit with refrigerant. When the outdoor unit is running normally, the third port and the fourth port are both in a closed state.

6. A single-zone cold chain split system, characterized in that, The system includes an outdoor unit as described in any one of claims 1 to 5, and also includes an indoor unit (300), wherein the indoor unit (300) is connected to a third pipe (330) and a fourth pipe (340), and the third pipe (330) and the fourth pipe (340) are used to connect to the first connecting pipe so that the outdoor unit and the indoor unit (300) form a closed loop.

7. The single-zone cold chain split machine system of claim 6, wherein, The third pipe (330) is used to connect with the first pipe (110), and the fourth pipe (340) is used to connect with the second pipe (120); The ends of the third pipe (330) and the fourth pipe (340) are detachably fitted with plugs (200) for sealing the ports.

8. The single-temperature zone cold chain split machine system according to claim 6, characterized in that, Both the third pipe (330) and the fourth pipe (340) can be flexible hoses.

9. A dual temperature zone cold chain split system, comprising: The unit includes an outdoor unit as described in any one of claims 1 to 5, and also includes a first indoor unit (310) and a second indoor unit (320), wherein the first indoor unit (310) is integrated into the outdoor unit body (100).

10. The dual zone cold chain split machine system of claim 9, wherein, The second indoor unit (320) is connected to a third pipe (330) and a fourth pipe (340), and the third pipe (330) and the fourth pipe (340) are used to connect with the first connecting pipe so that the integrated body of the outdoor unit (100) and the first indoor unit (310) forms a closed loop with the second indoor unit (320).

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