Fan coil with pressure maintaining plug

Abstract

The utility model discloses a fan coil with a pressure maintaining plug, which comprises a heat exchange module, a fan and a water pan, the end part of the heat exchange module is provided with two plugging parts, the two plugging parts at least comprise an inflating plug and a pressure testing plug, the inflating plug is provided with an inflating port, and the pressure testing plug is provided with a warning device; according to the utility model, the outer edges of the pressure test plug and the inflation plug can be hexagonal, so that fastening is realized without a wrench, and disassembly and assembly are facilitated; compared with an integrated connector of an air pump used in a workshop, the rubber inflation inner core is more convenient to use in the market, the structure can be matched with an existing inflation ball needle, is common at home and easy to purchase, an inflator can be used for inflating and pressing the heat exchange module, and if a plug is unscrewed midway, a secondary pressure maintaining test can be easily carried out on site.

Description

Technical Field

[0001] The utility model belongs to the technical field of fan coil units, and in particular relates to a fan coil unit with a pressure-maintaining plug. Background Art

[0002] As we all know, in the field of air conditioning technology, the heat exchange module of the fan coil unit needs to be subjected to a pressure test when it is completed to ensure that there is no leakage in the pipeline. Figure 1 As shown, internal high-pressure sealing is achieved by connecting a plugging joint to the pipeline of the heat exchange module.

[0003] The technical problem encountered in the prior art is that the heat exchange module pipelines may be damaged from the pressure resistance test to the fan coil assembly, product transportation and product on-site installation. In other words, the subsequent process cannot clearly guarantee that the heat exchange module pipelines are still intact, and there is a high probability of leakage in this process.

[0004] In the actual product assembly process, if the heat exchange module is found to be damaged during the water supply test after the product is installed, disassembly and replacement of the unit will require additional manpower and the internal pressurization process will be quite cumbersome.

[0005] In view of the above-mentioned drawbacks, as technicians in this industry, it is very necessary to improve the fan disk structure in the existing technology. Through structural improvement, after the existing pressure resistance test is completed, the pressure holding state can be intuitively observed in the subsequent production process. If there is a pressure relief condition, the pressure can be supplemented by the pressure holding plug at any stage. Utility Model Content

[0006] In order to overcome the deficiencies of the prior art, the utility model provides a fan coil unit with a pressure-maintaining plug, which has a novel structural design and improves the pressure-maintaining plug structure, and can always detect the pressure-maintaining state and perform real-time auxiliary pressure maintenance when necessary.

[0007] In order to achieve the above technical objectives, the utility model adopts the following scheme: a fan coil unit with a pressure-maintaining plug, which includes a heat exchange module, a fan, and a water collection pan. Two sealing components are provided at the end of the heat exchange module, and the two sealing components include at least an inflation plug and a pressure test plug. The inflation plug is provided with an inflation port, and the pressure test plug is provided with a warning device.

[0008] The inflatable plug is a screw-on end cover, on which a protrusion or a friction surface or a surface cooperating with a force-applying tool for increasing the force intensity is provided; and the screw-on end cover is provided with an embedded air nozzle.

[0009] The pressure test plug is a screw-on end cover, which is provided with a protrusion or a friction surface for increasing the force strength or a surface that cooperates with the force-applying tool; the screw-on end cover is provided with an axial through hole, and a pressure sensing device is provided in the axial through hole. The pressure sensing device includes a mechanical expansion piece or an electronic sensor alarm device.

[0010] The mechanical expansion piece is an elastic piece, the periphery of which is embedded in the axial through hole. Under low pressure, the middle of the elastic piece bulges inward, and under high pressure, the middle of the elastic piece bulges outward.

[0011] The embedded air nozzle comprises an inner concave covering bag, an inner groove is arranged in the inner concave covering bag, a rubber inflatable inner core is arranged in the inner concave covering bag, and the inflatable inner core is matched with the inner concave covering bag in a concave-convex manner.

[0012] The beneficial effects of the utility model are as follows: through the above arrangement, the utility model includes a heat exchange module, a fan, and a water collecting pan. Two sealing components are arranged at the end of the heat exchange module, and the two sealing components include at least an inflation plug and a pressure test plug. The inflation plug is provided with an inflation port, and the pressure test plug is provided with a warning device; the utility model can adopt a hexagonal shape on the outer edge of the pressure test plug and the inflation plug, and tightening does not require the aid of a wrench, which is convenient for disassembly and assembly; the rubber material inflation core is more convenient for market use than the integrated joint of the air pump used in the workshop, and this structure can be adapted to the existing inflation ball needle, which is common and easy to buy in households, and the heat exchange module can be inflated with an air pump. If the plug is loosened in the middle, a secondary pressure holding test can be easily carried out on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the prior art;

[0014] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the three-dimensional structure of the pressure test plug;

[0016] Figure 4 This is a schematic diagram of the main structure of the pressure test plug;

[0017] Figure 5 for Figure 4 Schematic diagram of the cross-section structure in the middle A direction (low pressure);

[0018] Figure 6 for Figure 4 Schematic diagram of the cross-section structure in the middle A direction (high pressure);

[0019] Figure 7 It is a schematic diagram of the three-dimensional structure of the inflatable plug;

[0020] Figure 8 This is a schematic diagram of the side structure of the inflatable plug;

[0021] Fig. 9 This is a schematic diagram of the main structure of the inflatable plug;

[0022] Fig.10 It is a schematic diagram of the cross-sectional structure in the B direction in 9;

[0023] In the accompanying drawings, 1, heat exchange module, 11, pipeline, 12, joint, 2, water tray, 3, fan, 4, pressure test plug, 41, pressure test end face, 42, force protrusion I, 43, screw thread section I, 44, elastic sheet, 441, embedded end, 442, protruding end, 5, inflation plug, 51, inflation end face, 52, force protrusion II, 53, screw thread II, 54, concave coated bag, 55, inner groove, 56, vent, 6, rubber inflation core, 61, protrusion, 62, inflation hole. DETAILED DESCRIPTION

[0024] As shown in the attached drawings, the utility model discloses a fan coil unit with a pressure-maintaining plug, the specific structure of which is as follows:

[0025] like Figure 2 As shown, the main structure is the same as that of the existing equipment, which includes a heat exchange module 1, a fan 3, and a water receiving tray 2. The end of the heat exchange module 1 is provided with two sealing components connected to the heat exchange module through a pipeline 11. The two sealing components include at least an inflation plug 5 and a pressure test plug 4. The inflation plug 4 is provided with an inflation port, and the pressure test plug 5 is provided with a warning device.

[0026] Embodiment 1 Based on the above specific structure, the utility model further explains the inflation plug 5 and the pressure test plug 4:

[0027] As shown in Figures 3-8, the inflation plug 5 is a screw-on end cover, which includes an inflation end face 51. A screw thread section II53 is provided on the side of the inflation end face 51, and a force-applying protrusion II52 is provided on the periphery of the inflation end face 51. External force-applying screwing can be achieved through the force-applying protrusion II52, so as to facilitate assembly and disassembly.

[0028] The inflation plug 5 is provided with an embedded gas nozzle, and the specific structure of the embedded gas nozzle is as follows: Fig.10As shown: the embedded air nozzle includes an inner concave encapsulated bag 54, in which an inner groove 55 is arranged, and the inner concave encapsulated bag 54 is axially penetrated, and a rubber inflatable inner core 6 is arranged in the inner concave encapsulated bag 54, and a protrusion 61 is arranged on the inflatable inner core 6 to match the inner groove 55. Through this structural setting, the inner groove 55 and the protrusion 61 form a radial concave-convex matching structure; the rubber inflatable inner core 6 is also provided with an inflation hole 62, and the inflation hole 62 is axially penetrated with the vent hole 56 on the inner concave encapsulated bag 54. Through the above structural setting, the rubber inflatable inner core 6 designed by the utility model is the same as a ball air nozzle, and a ball needle can be used to inflate the inside of the heat exchange module, thereby realizing flexible air pressure replenishment.

[0029] like Figure 3 , 4 As shown in Figures 5 and 6, the pressure test plug 4 is a screw-on end cover, which includes a pressure test end face 41. A screw-on thread section Ⅰ43 is provided on the side of the pressure test end face 41, and a force-applying protrusion Ⅰ42 is provided on the periphery of the pressure test end face 41. External force-applying screwing can be achieved through the force-applying protrusion Ⅰ42, so as to facilitate assembly and disassembly.

[0030] The pressure test plug 4 is provided with an axial through hole, and a pressure sensor is provided in the axial through hole. The pressure sensor is an electronic sensor alarm, which can be used to test the internal pressure of the pressure test plug 4. After the pressure test, the product can be set to the test state by setting the pressure value during the stages of fan coil assembly, product transportation and product on-site installation. If the pressure is too low, the electronic sensor alarm will sound an alarm. This monitoring process can clearly ensure that the heat exchange module pipeline is still intact, and if there is a leak during this process, the pressure can be supplemented at any time.

[0031] Embodiment 2 Based on Embodiment 1, an axial through hole is provided on the pressure test plug 4, and a pressure sensor is provided in the axial through hole. The pressure sensor is a mechanical expansion piece. Figure 3 , 4 As shown in , 5 and 6, the mechanical expansion piece is an elastic piece 44, the periphery of which is embedded in the axial through hole, and the middle of the elastic piece 44 bulges inward under low pressure, as shown in FIG. Figure 5 , 6 As shown, the elastic sheet 44 is a circular metal spring sheet, which includes an embedded end 441 and a protruding end 442 , and the embedded end 441 is inserted and embedded in the pressure test plug 4 .

[0032] When the product is tested for pressure resistance, an elastic sheet 44 is provided in the center of the pressure test plug 4. The elastic sheet 44 is concave toward the side of the heat exchange module 1 when no force is applied. When the inflation pressure inside the elastic sheet 44 increases to a certain level (for example, 2 atmospheres), the elastic sheet 44 pops outward and becomes convex due to the air pressure, accompanied by a sound, which can be used as a signal to stop inflation. The outward convexity of the elastic sheet 44 of the pressure test plug 4 indicates that the heat exchange module is in a pressure-maintaining state and there is no leakage in the pipeline. If the pressure is too low, the elastic sheet 44 becomes concave and this concave is visible and can be observed with the naked eye. External personnel can replenish the pressure at any time.

[0033] Furthermore, on the basis of Examples 1 and 2, the force-applying protrusions Ⅰ42 and Ⅱ52 provided on the pressure test plug 4 and the inflation plug 5 are radial protrusions, and those skilled in the art may also choose threaded surfaces, external hexagons or internal hexagons, etc., in order to increase the force application area or friction when personnel screw, so as to facilitate assembly and disassembly by personnel.

[0034] To sum up, the utility model can adopt irregular shapes on the outer edges of the pressure test plug 5 and the inflation plug 4, which is easy to apply force and convenient for disassembly and assembly; the rubber inflation core 6 adopted by it is more convenient for market promotion than the one-piece joint of the air pump used in the workshop. This structure can be adapted to the existing inflation ball needle, which is common and easy to buy in households, and an air pump can be used to inflate the heat exchange module. If the plug is loosened in the middle, a secondary pressure maintaining test can be easily carried out on site.

Claims

1. A fan coil unit with a pressure-maintaining plug, characterized in that: It includes a heat exchange module, a fan, and a water receiving tray. Two sealing components are arranged at the end of the heat exchange module. The two sealing components include at least an inflation plug and a pressure test plug. The inflation plug is provided with an inflation port, and the pressure test plug is provided with a warning device.

2. The fan coil unit with a pressure-maintaining plug according to claim 1, characterized in that: The inflatable plug is a screw-on end cover, on which a protrusion or a friction surface or a surface cooperating with a force-applying tool for increasing the force intensity is provided; and the screw-on end cover is provided with an embedded air nozzle.

3. The fan coil unit with a pressure-maintaining plug according to claim 1, characterized in that: The pressure test plug is a screw-on end cover, on which a protrusion or a friction surface or a surface cooperating with a force-applying tool for increasing the force strength is provided; an axial through hole is provided on the screw-on end cover, and a pressure sensor is provided in the axial through hole.

4. The fan coil unit with a pressure-maintaining plug as claimed in claim 3, characterized in that: The pressure sensing device is an electronic sensing alarm device.

5. The fan coil unit with a pressure-maintaining plug as claimed in claim 3, characterized in that: The pressure sensing device is a mechanical expansion piece, which is an elastic piece. Its periphery is embedded in the axial through hole. Under low pressure, the middle of the elastic piece bulges inward, and under high pressure, the middle of the elastic piece bulges outward.

6. The fan coil unit with a pressure-maintaining plug according to claim 2, characterized in that: The embedded air nozzle comprises an inner concave enveloping bag, an inner groove is arranged in the inner concave enveloping bag, a rubber inflatable inner core is arranged in the inner concave enveloping bag, and the inflatable inner core is matched with the inner concave enveloping bag in a concave-convex manner.

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