External subcooler of air conditioner

Abstract

The external subcooler of the air conditioner comprises an installation plate, a plate heat exchanger, an electronic expansion valve and a filter are installed on the front end face of the outer wall of the installation plate, the electronic expansion valve is located on the right side of the plate heat exchanger, and the filter is located below the electronic expansion valve. A liquid pipe inlet connector, a liquid pipe outlet connector, an air pipe inlet connector and an air pipe outlet connector are formed in the outer wall of the plate heat exchanger, the external subcooler assembly, pipelines and functional components are integrally designed in an integrated module mode, an external subcooler is only provided with four connectors, welding is not needed in field transformation, and the installation plate is arranged, so that the structure is simple, and the cost is low. A plurality of mounting holes are formed in the outer wall of the mounting plate, the device can be mounted outdoors or indoors, mounting is convenient, a sensor wire is lengthened, and the electronic expansion valve, the supercooling outlet temperature sensor and the subcooler auxiliary path outlet temperature sensor are all electrically connected with an external outdoor unit mainboard; and automatic control of the electronic expansion valve and automatic adjustment and matching of the system supercooling degree are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of supercoolers, in particular to an external supercooler for an air conditioner. Background Art

[0002] The subcooling degree before the valve of the cooling and heating operation system affects the system operation stability, refrigerant flow noise and refrigeration cycle energy efficiency. For multi-split units, the installation conditions are non-standard and harsh, which can easily cause the system subcooling degree to be low. For systems that lack subcooler design, after the subsequent installation is completed, the user side cannot perform system modification to improve the subcooling degree, which affects the normal performance of the unit. At present, the subcooler system design is built-in when the unit leaves the factory, and it cannot be standard for all product series. For ordinary units after installation, if problems arise due to installation conditions that do not meet the specifications, it is impossible to use the subcooler hardware solution on site;

[0003] As for the noise and its effects caused by conditions that do not meet the requirements of the specifications, a large part of them are caused by insufficient system subcooling, poor refrigerant flow pattern, and high dryness, which lead to unstable expansion valves and cause system fluctuations and noise problems; the subcooler usually adopts a plate exchange system design, which is divided into two ways of liquid extraction: upper liquid extraction and lower liquid extraction. Currently, some product series are factory-built in and fixed by welding, and it is impossible to achieve standard configuration for all product series. In the scenario where the user has completed the installation, due to the installation not meeting the requirements, the system subcooling is insufficient, and the hardware cannot be modified on-site to achieve the purpose of secondary increase in system subcooling. Utility Model Content

[0004] The utility model aims to provide an external subcooler for air conditioner, which has an overall integrated module design of external subcooler assembly, pipelines and functional components, is easy to install and can quickly increase the subcooling degree of the system.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an air-conditioning external subcooler, comprising a mounting plate, a plate heat exchanger, an electronic expansion valve and a filter mounted on the front end surface of the outer wall of the mounting plate, the electronic expansion valve being located on the right side of the plate heat exchanger, the filter being located below the electronic expansion valve, the outer wall of the plate heat exchanger being provided with a liquid pipe inlet interface, a liquid pipe outlet interface, an air pipe inlet interface and an air pipe outlet interface, the liquid pipe inlet interface and the air pipe outlet interface extending to the bottom of the mounting plate, the liquid pipe outlet interface and the air pipe inlet interface extending to the top of the mounting plate, the inlet end of the filter being in communication with the liquid pipe outlet interface, and the outlet end of the filter being in communication with the inlet end of the electronic expansion valve;

[0006] The front end face of the mounting plate is fixedly connected to the lower outer shell, the outer wall of the lower outer shell is detachably connected to the upper outer shell, the lower end face of the upper outer shell is provided with a wiring hole, and the bottom and top of the lower outer shell and the upper outer shell are both provided with two interface reserved openings.

[0007] In order to facilitate the detection of the subcooling outlet and the subcooler auxiliary line outlet temperature, as an air-conditioning external subcooler preferred in the present invention, the outer walls of the air pipe inlet interface and the liquid pipe outlet interface are respectively provided with a subcooling outlet temperature sensor and a subcooler auxiliary line outlet temperature sensor.

[0008] In order to facilitate the operation and control of the electronic expansion valve and sensor, as an air-conditioning external subcooler preferred in the present invention, the electronic expansion valve, subcooling outlet temperature sensor and subcooler auxiliary outlet temperature sensor are all electrically connected to the external outdoor unit mainboard.

[0009] In order to facilitate the installation of the equipment, as a preferred embodiment of the air-conditioning external supercooler of the present invention, the outer wall of the mounting plate is provided with a plurality of mounting holes.

[0010] In order to improve the waterproof sealing effect of the wiring hole, as a preferred external supercooler for an air conditioner of the present invention, a waterproof rubber ring is provided on the inner side of the wiring hole.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] The air conditioner has an external subcooler, and the liquid pipe inlet interface and the gas pipe outlet interface extend to the bottom of the mounting plate, and the liquid pipe outlet interface and the gas pipe inlet interface extend to the top of the mounting plate. The inlet end of the filter is connected to the liquid pipe outlet interface, and the outlet end of the filter is connected to the inlet end of the electronic expansion valve. The external subcooler assembly, pipelines, and functional components are designed as an integrated module. The external subcooler has only four interfaces and no welding is required for on-site modification. By setting a mounting plate with multiple mounting holes on the outer wall of the mounting plate, it can be installed outdoors or indoors, which is convenient for installation. The sensor line is lengthened, and the electronic expansion valve, subcooling outlet temperature sensor and subcooler auxiliary outlet temperature sensor are all electrically connected to the external outdoor unit mainboard to achieve automatic control of the electronic expansion valve and automatic adjustment and matching of the system subcooling degree. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is the main internal structural diagram of the utility model;

[0014] Figure 2 This is a three-dimensional diagram of the overall internal structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the overall decomposition structure of the utility model;

[0016] Figure 4 This is the main structural diagram of the upper outer shell of the utility model in the installed state.

[0017] In the figure: 1. Mounting plate; 2. Plate heat exchanger; 3. Electronic expansion valve; 4. Filter; 5. Liquid pipe inlet interface; 6. Liquid pipe outlet interface; 7. Gas pipe inlet interface; 8. Gas pipe outlet interface; 9. Subcooling outlet temperature sensor; 10. Subcooler auxiliary line outlet temperature sensor; 11. Lower outer shell; 12. Upper outer shell; 13. Wiring hole; 14. Interface reserved opening; 15. Mounting hole. DETAILED DESCRIPTION

[0018] See also Figures 1 to 4 , an air-conditioning external supercooler, comprising a mounting plate 1, a plate heat exchanger 2, an electronic expansion valve 3 and a filter 4 are mounted on the front end surface of the outer wall of the mounting plate 1, the electronic expansion valve 3 is located on the right side of the plate heat exchanger 2, and the filter 4 is located below the electronic expansion valve 3, and a liquid pipe inlet interface 5, a liquid pipe outlet interface 6, an air pipe inlet interface 7 and an air pipe outlet interface 8 are provided on the outer wall of the plate heat exchanger 2, the liquid pipe inlet interface 5 and the air pipe outlet interface 8 extend to the bottom of the mounting plate 1, the liquid pipe outlet interface 6 and the air pipe inlet interface 7 extend to the top of the mounting plate 1, the inlet end of the filter 4 is connected to the liquid pipe outlet interface 6, and the outlet end of the filter 4 is connected to the inlet end of the electronic expansion valve 3;

[0019] The front end face of the mounting plate 1 is fixedly connected to the lower outer shell 11, the outer wall of the lower outer shell 11 is detachably connected to the upper outer shell 12, the lower end face of the upper outer shell 12 is provided with a wiring hole 13, and the bottom and top of the lower outer shell 11 and the upper outer shell 12 are provided with two interface reserved openings 14.

[0020] In this embodiment: the air conditioner is equipped with an external subcooler, the liquid pipe inlet interface 5 and the air pipe outlet interface 8 extend to the bottom of the mounting plate 1, the liquid pipe outlet interface 6 and the air pipe inlet interface 7 extend to the top of the mounting plate 1, the inlet end of the filter 4 is connected to the liquid pipe outlet interface 6, and the outlet end of the filter 4 is connected to the inlet end of the electronic expansion valve 3. The external subcooler assembly, pipelines, and functional components are designed as an integrated module. The external subcooler has only four interfaces, and no welding is required for on-site modification. By providing a mounting plate 1, and providing multiple mounting holes 15 on the outer wall of the mounting plate 1, it can be installed outdoors or indoors, and the installation is convenient. The sensor line is lengthened, and the electronic expansion valve 3, the subcooling outlet temperature sensor 9, and the subcooler auxiliary outlet temperature sensor 10 are all electrically connected to the external outdoor unit mainboard, realizing automatic control of the electronic expansion valve 3 and automatic adjustment and matching of the system subcooling degree.

[0021] As a technical optimization solution of the present invention, the outer walls of the gas pipe inlet interface 7 and the liquid pipe outlet interface 6 are respectively provided with a subcooling outlet temperature sensor 9 and a subcooler auxiliary line outlet temperature sensor 10.

[0022] In this embodiment, the outer walls of the gas pipe inlet interface 7 and the liquid pipe outlet interface 6 are respectively provided with a subcooling outlet temperature sensor 9 and a subcooler auxiliary line outlet temperature sensor 10 to achieve automatic adjustment and matching of the system subcooling degree.

[0023] As a technical optimization solution of the present invention, the electronic expansion valve 3, the subcooling outlet temperature sensor 9 and the subcooler auxiliary line outlet temperature sensor 10 are all electrically connected to the external outdoor unit mainboard.

[0024] In this embodiment, the electronic expansion valve 3, the subcooling outlet temperature sensor 9 and the subcooler auxiliary outlet temperature sensor 10 are all electrically connected to the external outdoor unit mainboard to achieve automatic control of the electronic expansion valve 3 and automatic adjustment and matching of the system subcooling degree.

[0025] As a technical optimization solution of the present invention, a plurality of mounting holes 15 are provided on the outer wall of the mounting plate 1 .

[0026] In this embodiment, a plurality of mounting holes 15 are provided on the outer wall of the mounting plate 1, which can be installed outdoors or indoors, and is easy to install.

[0027] As a technical optimization solution of the present invention, a waterproof rubber ring is provided inside the wiring hole 13 .

[0028] In this embodiment, a waterproof rubber ring is provided inside the wiring hole 13 to effectively improve the waterproof sealing effect of the inside of the wiring hole 13.

[0029] Working principle: The air conditioner has an external subcooler, the liquid pipe inlet interface 5 and the air pipe outlet interface 8 extend to the bottom of the mounting plate 1, the liquid pipe outlet interface 6 and the air pipe inlet interface 7 extend to the top of the mounting plate 1, the inlet end of the filter 4 is connected to the liquid pipe outlet interface 6, and the outlet end of the filter 4 is connected to the inlet end of the electronic expansion valve 3. The external subcooler assembly, pipelines, and functional components are designed as an integrated module. The external subcooler has only four interfaces and no welding is required for on-site modification. By setting up a mounting plate 1 and providing multiple mounting holes 15 on the outer wall of the mounting plate 1, it can be installed outdoors or indoors, which is easy to install. The sensor line is lengthened, and the electronic expansion valve 3, the subcooling outlet temperature sensor 9 and the subcooler auxiliary outlet temperature sensor 10 are all electrically connected to the external outdoor unit mainboard to achieve automatic control of the electronic expansion valve 3 and automatic adjustment and matching of the system subcooling degree.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An external supercooler for an air conditioner, comprising a mounting plate (1), characterized in that: A plate heat exchanger (2), an electronic expansion valve (3) and a filter (4) are installed on the front end surface of the outer wall of the mounting plate (1); the electronic expansion valve (3) is located on the right side of the plate heat exchanger (2); and the filter (4) is located below the electronic expansion valve (3); a liquid pipe inlet interface (5), a liquid pipe outlet interface (6), an air pipe inlet interface (7) and an air pipe outlet interface (8) are provided on the outer wall of the plate heat exchanger (2); the liquid pipe inlet interface (5) and the air pipe outlet interface (8) extend to the bottom of the mounting plate (1); the liquid pipe outlet interface (6) and the air pipe inlet interface (7) extend to the top of the mounting plate (1); the inlet end of the filter (4) is in communication with the liquid pipe outlet interface (6); and the outlet end of the filter (4) is in communication with the inlet end of the electronic expansion valve (3); The front end surface of the mounting plate (1) is fixedly connected to a lower outer shell (11), the outer wall of the lower outer shell (11) is detachably connected to an upper outer shell (12), a wiring hole (13) is provided on the lower end surface of the upper outer shell (12), and two interface reserved openings (14) are provided at the bottom and top of each of the lower outer shell (11) and the upper outer shell (12).

2. The external supercooler for air conditioning according to claim 1, characterized in that: The outer walls of the gas pipe inlet interface (7) and the liquid pipe outlet interface (6) are respectively provided with a subcooling outlet temperature sensor (9) and a subcooler auxiliary path outlet temperature sensor (10).

3. The external supercooler for air conditioning according to claim 2, characterized in that: The electronic expansion valve (3), the subcooling outlet temperature sensor (9) and the subcooler auxiliary path outlet temperature sensor (10) are all electrically connected to the external outdoor unit mainboard.

4. The external supercooler for air conditioning according to claim 1, characterized in that: The outer wall of the mounting plate (1) is provided with a plurality of mounting holes (15).

5. The external supercooler for air conditioning according to claim 1, characterized in that: A waterproof rubber ring is provided on the inner side of the wiring hole (13).

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