Fan coil, sheath and air conditioning system

Abstract

The invention discloses a fan coil, a sheath and an air conditioning system, and relates to the technical field of air conditioners. The heat exchanger is arranged in the shell, the heat exchanger is provided with a water inlet and a water outlet, the water inlet and the water outlet are connected with an external pipeline through metal joints, the shell is provided with mounting through holes corresponding to the metal joints, and the metal joints are arranged in the mounting through holes in a penetrating manner; and the sheath is provided with a mounting channel penetrating through the sheath, and the sheath is arranged in the mounting through hole in a penetrating manner and is arranged outside the metal joint in a sleeving manner. When the fan coil is used, the metal connector is sleeved with the protective sleeve used for heat preservation, so that the protective sleeve and the metal connector are arranged in the installation through hole in the shell in a penetrating mode at the same time, the protective sleeve can prevent the metal connector from making contact with the shell of the fan coil to form a cold bridge, cooling capacity loss is reduced, and the service life of the fan coil is prolonged. And condensed water condensation caused by temperature reduction on the surface of the shell is prevented.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to a fan coil unit, a sheath, and an air conditioning system. Background Technology

[0002] In related technologies, fan coil units, as one of the terminal devices of air conditioning systems, typically include a housing and a heat exchanger installed inside the housing. The heat exchanger has an inlet and an outlet, and the inlet and outlet of the heat exchanger are usually connected to external pipelines by metal joints (such as brass joints) that pass through the side wall of the housing.

[0003] Traditional fan coil units currently have the following problems: 1. Since the casing of the fan coil unit is usually made of metal, under cooling conditions, the metal joints running through the side wall of the casing come into contact with the casing, forming a cold bridge. This causes both heat loss and condensation on the surface of the casing due to temperature drop. The condensate dripping can easily cause a "ceiling blister" accident (i.e., the ceiling of the building is soaked with water); 2. The metal joints and external pipes are usually connected by threads, which can lead to slight leaks at the connection point due to poor sealing or loosening caused by vibration. These slight leaks can easily cause a "ceiling blister" accident; 3. The metal joints and external pipes usually need to be wrapped with insulation cotton. However, due to the limited operating space at the metal joints, the insulation cotton may not be wrapped properly or thick enough, creating a weak point in the insulation. This, in turn, makes the metal joints prone to heat loss and condensation. Summary of the Invention

[0004] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes a fan coil unit that can prevent the metal joints at the inlet and outlet of the heat exchanger from contacting the fan coil unit casing and forming a cold bridge.

[0005] The fan coil unit according to the first aspect of this application includes: case; A heat exchanger is disposed inside the shell. The heat exchanger has an inlet and an outlet. Both the inlet and the outlet are connected to an external pipeline through metal joints. The shell is provided with mounting through holes corresponding to the metal joints, and the metal joints pass through the mounting through holes. A heat-insulating sleeve having a through-hole for installation, the sleeve passing through the through-hole and fitted over the metal joint.

[0006] The fan coil unit according to the embodiments of this application has at least the following beneficial effects: When in use, the heat insulation sleeve is placed over the metal joint so that the sleeve and the metal joint are simultaneously inserted into the mounting through hole on the housing. The sleeve can prevent the metal joint from contacting the housing of the fan coil unit and forming a cold bridge, which not only helps to reduce the loss of cold energy, but also helps to prevent condensation from forming on the surface of the housing due to the decrease in temperature.

[0007] According to some embodiments of this application, a water receiving tray is provided at the bottom of the housing below the heat exchanger, the mounting through hole is provided on the side wall of the housing, the end face of the metal connector away from the heat exchanger is located in the mounting channel, so that there is a preset distance between the end face of the metal connector away from the heat exchanger and the end face of the sheath facing away from the heat exchanger, and the bottom area of ​​the mounting channel is provided with a guide slope for guiding water to the water receiving tray.

[0008] According to some embodiments of this application, the cross-sectional area of ​​the mounting channel increases from the end of the sheath facing away from the heat exchanger to the end of the sheath facing the heat exchanger, so that the bottom region of the mounting channel forms the guide slope.

[0009] According to some embodiments of this application, the inner wall of the mounting channel is provided with at least two protrusions spaced apart along the circumference of the mounting channel for clamping the metal connector.

[0010] According to some embodiments of this application, the end face of the sheath facing away from the heat exchanger protrudes from the outer surface of the side wall of the housing, and the portion of the sheath outside the housing is used to wrap the insulation cotton.

[0011] According to some embodiments of this application, the color of the sheath is configured to be different from the color of the insulation cotton.

[0012] According to some embodiments of this application, the sheath is provided with a connecting ear, the connecting ear is provided with a connecting hole for passing a fastener through, and the housing is provided with a mounting hole for installing the fastener corresponding to the connecting hole.

[0013] According to some embodiments of this application, the sheath is made of EPP material.

[0014] A sheath according to a second aspect of this application is applied to a fan coil unit according to the first aspect of this application described above.

[0015] An air conditioning system according to a third aspect of this application includes a fan coil unit according to the first aspect of this application described above.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of a fan coil unit according to an embodiment of this application; Figure 2 yes Figure 1 Enlarged view of a portion of point A in the middle; Figure 3 This is a cross-sectional schematic diagram of a fan coil unit according to an embodiment of this application after wrapping the metal joint with thermal insulation cotton; Figure 4 yes Figure 3 Enlarged view of a portion of point B in the middle; Figure 5 This is a schematic diagram of the structure of a sheath according to an embodiment of this application; Figure 6 This is a cross-sectional schematic diagram of a sheath according to an embodiment of this application.

[0018] Figure label: Insulating cotton a; Casing 100; Heat exchanger 200; Metal connector 300; Sheath 400, mounting channel 410, guide slope 411, protrusion 412, connecting ear 420, connecting hole 421; Water tray 500. Detailed Implementation

[0019] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0020] In the description of this application, it should be understood that if directional descriptions are involved, such as up, down, front, back, left, right, etc., indicating the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0021] In the description of this application, if words such as several, greater than, less than, exceeding, above, below, or within appear, "several" means one or more, "more than" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the number itself, and "above," "below," "within," etc. are understood to include the number itself.

[0022] In the description of this application, the use of terms such as "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0023] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0024] Reference Figures 1 to 6 According to an embodiment of this application, a fan coil unit includes a housing 100, a heat exchanger 200, and a heat insulation sleeve 400.

[0025] Specifically, the heat exchanger 200 is installed inside the shell 100. The heat exchanger 200 has an inlet and an outlet. Both the inlet and outlet are connected to external pipelines through metal joints 300. The shell 100 has a mounting through hole corresponding to the metal joint 300. The metal joint 300 passes through the mounting through hole. The sheath 400 has a through mounting channel 410. The sheath 400 passes through the mounting through hole and is fitted over the metal joint 300.

[0026] It should be noted that the housing 100 is made of metal. Specifically, the housing 100 is a sheet metal structure.

[0027] In use, the insulation sleeve 400 is fitted over the metal connector 300 so that the sleeve 400 and the metal connector 300 are simultaneously inserted into the mounting through hole on the housing 100. The sleeve 400 can prevent the metal connector 300 from contacting the housing 100 of the fan coil unit and forming a cold bridge. This not only helps to reduce cold loss, but also helps to prevent condensation from forming on the surface of the housing 100 due to temperature drop.

[0028] Reference Figures 1 to 4 as well as Figure 6In some embodiments, a water receiving tray 500 located below the heat exchanger 200 is provided at the bottom of the housing 100, and a mounting through hole is provided on the side wall of the housing 100. The end face of the metal connector 300 away from the heat exchanger 200 is located in the mounting channel 410, so that there is a preset distance between the end face of the metal connector 300 away from the heat exchanger 200 and the end face of the sheath 400 facing away from the heat exchanger 200. The bottom area of ​​the mounting channel 410 is provided with a guide slope 411 for guiding water to the water receiving tray 500. Since the end face of the metal joint 300 away from the heat exchanger 200 is located inside the installation channel 410, that is, the connection between the metal joint 300 and the external pipeline is located inside the installation channel 410, when there is a slight water leakage at the connection between the metal joint 300 and the external pipeline due to poor sealing or loosening caused by vibration, the water droplets formed by the slight water leakage at the connection between the metal joint 300 and the external pipeline can drip to the bottom area of ​​the installation channel 410 under their own weight. Since the bottom area of ​​the installation channel 410 is provided with a guide slope 411 for guiding water to the water receiving tray 500, the water droplets dripping to the bottom area of ​​the installation channel 410 can be guided by the guide slope 411 to the water receiving tray 500 inside the shell 100. This helps to prevent the water droplets formed by the slight water leakage at the connection between the metal joint 300 and the external pipeline from dripping directly onto the ceiling of the building and causing a "flooded ceiling" accident.

[0029] In addition, the aforementioned guide slope 411 also helps to prevent water droplets formed by slight leakage at the connection between the metal joint 300 and the external pipeline from flowing into the insulation cotton a wrapped around the external pipeline, thereby helping to keep the insulation cotton a dry and thus helping to maintain the insulation performance of the insulation cotton a.

[0030] It should be noted that the preset spacing mentioned above is 10-15mm. Specifically, the preset spacing can be 10mm, 15mm, 12mm, or other values ​​within the above range.

[0031] Reference Figure 6 In some embodiments, the cross-sectional area of ​​the mounting channel 410 increases from the end of the sheath 400 facing away from the heat exchanger 200 to the end of the sheath 400 facing the heat exchanger 200, so that the bottom region of the mounting channel 410 forms a guide slope 411. Thus, when installing the sheath 400, it is not necessary to deliberately distinguish between the top region and the bottom region with the guide slope 411 in the mounting channel 410, thereby reducing assembly difficulty and improving assembly efficiency.

[0032] It should be noted that the cross-sectional area of ​​the mounting channel 410 does not involve the solid portion of the sheath 400.

[0033] Specifically, the cross-sectional shape of the mounting channel 410 can be circular, polygonal, or other irregular shapes.

[0034] Reference Figure 2 as well as Figures 4 to 6 In some embodiments, the inner wall of the mounting channel 410 is provided with at least two protrusions 412 spaced apart circumferentially along the mounting channel 410 for clamping the metal connector 300. On the one hand, this prevents the metal connector 300 from easily becoming loose due to the varying cross-sectional area of ​​the mounting channel 410. On the other hand, it creates a gap between the area at the bottom of the mounting channel 410 where the protrusions 412 are not provided and the metal connector 300, so that water droplets from slight leaks at the connection between the metal connector 300 and the external pipeline can be guided to the water collection tray 500 inside the housing 100.

[0035] Reference Figures 1 to 4 In some embodiments, the end face of the sheath 400 facing away from the heat exchanger 200 protrudes from the outer surface of the side wall of the housing 100, and the portion of the sheath 400 outside the housing 100 (i.e. the portion of the sheath 400 protruding from the outer surface of the side wall of the housing 100) is used to wrap the insulation cotton a. During the process of wrapping the metal joint 300 with the external pipe to which it is connected, when the insulation cotton a completely wraps the part of the sheath 400 outside the shell 100, compared to the case where the insulation cotton a is directly wrapped outside the metal joint 300, double insulation can be achieved through the sheath 400 and the insulation cotton a. In addition, even if the insulation cotton a does not completely wrap the part of the sheath 400 outside the shell 100, compared to the case where the insulation cotton a is directly wrapped outside the metal joint 300 and not wrapped properly, since the metal joint 300 is covered with the sheath 400, the sheath 400 can also provide insulation function to ensure the insulation effect at the metal joint 300, that is, it will not create a weak point in the insulation, thereby improving the error tolerance during construction.

[0036] Based on this, when wrapping the metal joint 300 with the external pipe connected to it with insulation cotton a, the end face of the sheath 400 facing away from the heat exchanger 200 forms a clear "wrapping baseline". The operator only needs to ensure that the wrapped insulation cotton a at least covers the end of the sheath 400 facing away from the heat exchanger 200. Specifically, since the end face of the sheath 400 facing away from the heat exchanger 200 protrudes from the outer surface of the side wall of the shell 100, the operator can intuitively judge whether the wrapped insulation cotton a is properly wrapped. That is, the operator can observe whether the end of the sheath 400 facing away from the heat exchanger 200 is wrapped with insulation cotton a. When the insulation cotton a is not properly wrapped, the end face of the sheath 400 facing away from the heat exchanger 200 will be exposed, which is convenient for the operator to quickly identify and rectify. Compared with the traditional wrapping method that requires measurement and marking, it helps to ensure the efficiency and accuracy of construction.

[0037] In other words, the above design integrates "thermal insulation function" with "quality judgment function," achieving "visible insulation quality." Sheath 400 not only provides physical insulation but also solves the "invisible and intangible" quality control problem in traditional insulation construction through visual design.

[0038] In some embodiments, the sheath 400 has a wall thickness of 20-30 mm to ensure that it provides sufficient insulation for the metal joint 300, thereby ensuring insulation for areas where the insulation cotton a is not properly wrapped at the metal joint 300. Specifically, the wall thickness of the sheath 400 can be 20 mm, 30 mm, 25 mm, or other values ​​within the aforementioned range.

[0039] In some embodiments, the color of the sheath 400 is different from that of the insulation cotton a, so that there is a clear color difference between the sheath 400 and the insulation cotton a, so as to help the operator better judge whether the insulation cotton a is properly wrapped.

[0040] Specifically, since thermal insulation cotton (a) is usually black or dark gray, the color of the sheath (400) can be a more eye-catching color such as yellow or orange.

[0041] Reference Figure 5 In some embodiments, the sheath 400 is provided with a connecting lug 420, and the connecting lug 420 is provided with a connecting hole 421 for fasteners to pass through. The housing 100 is provided with a mounting hole corresponding to the connecting hole 421 for mounting the fasteners. In this way, the sheath 400 can be fixed to the housing 100 by fasteners, thereby improving the stability and reliability of the sheath 400.

[0042] In some embodiments, the connecting ear 420 is a metal structure with a portion embedded inside the sheath 400. On the one hand, this can improve the stability and reliability of the connection structure between the sheath 400 and the housing 100. On the other hand, it can prevent the metal connecting ear 420 from contacting the housing 100 and the metal connector 300 simultaneously, thus avoiding the formation of a cold bridge.

[0043] In some embodiments, the sheath 400 is made of EPP (expanded polypropylene). EPP material has a thermal conductivity of only 0.06–0.28 W / (m·K) and a closed-cell ratio exceeding 95%, thus effectively blocking heat conduction. Furthermore, EPP material also possesses advantages such as light weight, high strength, and resistance to moisture corrosion.

[0044] Reference Figure 5 and Figure 6 The sheath 400 according to an embodiment of this application is applied to the fan coil unit as described above.

[0045] An air conditioning system according to an embodiment of this application includes the fan coil unit described above.

[0046] In the description of this specification, the use of terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," and "some examples" indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A fan coil unit, characterized in that, include: case; A heat exchanger is disposed inside the shell. The heat exchanger has an inlet and an outlet. Both the inlet and the outlet are connected to an external pipeline through metal joints. The shell is provided with mounting through holes corresponding to the metal joints, and the metal joints pass through the mounting through holes. A heat-insulating sleeve having a through-hole for installation, the sleeve passing through the through-hole and fitted over the metal joint.

2. The fan coil unit as described in claim 1, characterized in that, The housing has a water receiving tray located below the heat exchanger at the bottom. The mounting through hole is located on the side wall of the housing. The end face of the metal connector away from the heat exchanger is located in the mounting channel, so that there is a preset distance between the end face of the metal connector away from the heat exchanger and the end face of the sheath facing away from the heat exchanger. The bottom area of ​​the mounting channel is provided with a guide slope for guiding water to the water receiving tray.

3. The fan coil unit as described in claim 2, characterized in that, From the end of the sheath facing away from the heat exchanger to the end of the sheath facing the heat exchanger, the cross-sectional area of ​​the mounting channel increases so that the bottom region of the mounting channel forms the guide slope.

4. The fan coil unit as described in claim 3, characterized in that, The inner wall of the installation channel is provided with at least two protrusions at intervals along the circumference of the installation channel for clamping and abutting the metal connector.

5. The fan coil unit as described in any one of claims 2 to 4, characterized in that, The end face of the sheath facing away from the heat exchanger protrudes from the outer surface of the side wall of the shell, and the portion of the sheath outside the shell is used to wrap the insulation cotton.

6. The fan coil unit as described in claim 5, characterized in that, The color of the sheath is different from the color of the insulation cotton.

7. The fan coil unit as described in claim 1, characterized in that, The sheath is provided with a connecting lug, and the connecting lug is provided with a connecting hole for fasteners to pass through. The housing is provided with a mounting hole for fasteners to be installed corresponding to the connecting hole.

8. The fan coil unit as described in claim 1, characterized in that, The sheath is made of EPP material.

9. A sheath in a fan coil unit as described in any one of claims 1 to 8, characterized in that, The sheath is used for fan coil units.

10. An air conditioning system, characterized in that, Includes the fan coil unit as described in any one of claims 1 to 8.

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