All-dc motor driven wall hung fan-coil

Abstract

The application relates to the field of air treatment equipment, and a full-DC motor driving wall-mounted fan-coil unit which comprises a shell, a surface cooler, a water inlet pipe, a water outlet pipe, a four-port three-way valve, a water supply pipe and a water return pipe. The surface cooler, the water inlet pipe, the water outlet pipe and the four-port three-way valve are located on the inner side of the shell. One end of the water inlet pipe, the water outlet pipe, the water supply pipe and the water return pipe is connected to the four-port three-way valve. The water inlet pipe and the water outlet pipe are connected to the surface cooler. The other end of the water supply pipe and the water return pipe extends out of the shell. The water inlet pipe, the water outlet pipe, the water supply pipe and the water return pipe are connected through the four-port three-way valve. When the fan-coil unit stops working, the liquid in the water supply pipe can be directly discharged through the water return pipe, so that the energy consumption of an external water pump is reduced. The four-port three-way valve is built in the shell, so that an external four-port three-way valve is not needed, the space for assembling the valve assembly is not needed when the fan-coil unit is installed, the installation steps of the fan-coil unit are simplified, the installation cost of the fan-coil unit is reduced, and the working efficiency of the fan-coil unit installation is improved.

Description

Technical Field

[0001] This application relates to the field of air handling equipment, and more particularly to a wall-mounted fan coil unit driven by a fully DC motor. Background Technology

[0002] Currently, wall-mounted fan coil units mainly consist of cross-flow fans and coil heat exchangers. They are terminal devices of central air conditioning systems and are widely used in air conditioning applications in multi-room or large-space industrial or civil buildings such as hotels, restaurants, factories, hospitals, shopping malls, and office buildings to meet requirements for cooling, dehumidification, and heating.

[0003] The valve assembly is a key component in wall-mounted fan coil units used to control flow. Currently, in existing fan coil unit installations, the valve assembly is primarily located at the rear of the unit. During on-site installation, it can only be installed outside the unit, and then connected to the fan coil unit's inlet and outlet water pipes. This installation method has the following disadvantages:

[0004] 1) When installing, users need to consider reserving space outside the machine for assembling valve components;

[0005] 2) Installation is inconvenient and affects the aesthetics and layout of the entire room. Utility Model Content

[0006] To simplify the installation steps of fan coil units, reduce installation costs, and improve installation efficiency, this application provides a wall-mounted fan coil unit driven by a fully DC motor.

[0007] The technical solution for a wall-mounted fan coil unit driven by a fully DC motor provided in this application is as follows:

[0008] A wall-mounted fan coil unit driven by a DC motor includes a housing, a surface cooler, an inlet pipe, an outlet pipe, a four-port three-way valve, a supply pipe, and a return pipe. The surface cooler, inlet pipe, outlet pipe, and four-port three-way valve are located inside the housing. One end of the inlet pipe, outlet pipe, supply pipe, and return pipe is connected to the four-port three-way valve. The inlet pipe and outlet pipe are connected to the surface cooler. The other end of the supply pipe and return pipe extends out of the housing.

[0009] By adopting the above technical solution, the inlet pipe, outlet pipe, supply pipe and return pipe are connected by a four-port three-way valve. When the fan coil unit stops working, the liquid entering the supply pipe can be directly discharged through the return pipe, reducing the energy consumption of the external water pump. The four-port three-way valve is built into the housing, eliminating the need for an external four-port three-way valve. This eliminates the need to reserve space for valve assembly during fan coil unit installation, simplifying the installation steps, reducing installation costs, and improving installation efficiency.

[0010] Preferably, it also includes an electric valve actuator, which is connected to a four-port three-way valve and is used to control the on / off connection between the inlet pipe, outlet pipe, supply pipe and return pipe.

[0011] By adopting the above technical solution, the electric valve actuator is connected to the four-port three-way valve and can be equipped with a built-in control module to remotely control the electric valve actuator, thereby realizing the adjustment of the four-port three-way valve and controlling the on / off of the inlet pipe, outlet pipe, supply pipe and return pipe, improving the convenience of the fan coil unit's water inlet and outlet control.

[0012] Preferably, the four-port three-way valve includes a valve body and a connecting sleeve. The electric valve actuator is connected to one end of the valve body, and the connecting sleeve is connected to the valve body. The connecting sleeve is threadedly connected to the electric valve actuator to achieve a fixed connection between the valve body and the electric valve actuator. Several anti-slip strips are connected to the outside of the connecting sleeve, and the several anti-slip strips are distributed circumferentially around the connecting sleeve.

[0013] By adopting the above technical solution, the connecting sleeve and the electric valve actuator are threaded together to achieve a fixed connection between the valve body and the electric valve actuator. The rotatable connecting sleeve allows for the disassembly and assembly of the valve body and the electric valve actuator, enabling the maintenance or replacement of the four-port three-way valve or the electric valve actuator, and improving the service life of the fan coil unit. The connecting sleeve is equipped with anti-slip strips on its outer circumference, which increases the friction between the maintenance personnel's palm and the connecting sleeve when they hold the connecting sleeve and rotate it, making it easier to rotate the connecting sleeve.

[0014] Preferably, the electric valve actuator has several anti-slip protrusions evenly distributed on the outer periphery near the valve body.

[0015] By adopting the above technical solution, several anti-slip protrusions are evenly distributed on the outer periphery of the electric valve actuator, which increases the friction between the assembler's palm and the electric valve actuator, making it easier to connect the electric valve actuator and the four-port three-way valve, and improving the convenience of fan coil unit assembly.

[0016] Preferably, it also includes an air release valve, which is connected to the water outlet pipe.

[0017] By adopting the above technical solution, the vent valve is connected to the water outlet pipe, which can discharge the gas in the water outlet pipe, ensure smooth water flow, guarantee the normal operation of the fan coil unit, and improve the reliability and safety of the fan coil unit.

[0018] Preferably, there are several surface coolers. The side wall of the inlet pipe is connected to an inlet branch pipe. The number of inlet branch pipes is the same as the number of surface coolers and they correspond one-to-one. The other end of the inlet branch pipe is connected to the surface cooler. The side wall of the outlet pipe is connected to an outlet branch pipe. The number of outlet branch pipes is the same as the number of surface coolers and they correspond one-to-one. The other end of the outlet branch pipe is connected to the surface cooler.

[0019] By adopting the above technical solution, multiple surface coolers are set up. The water inlet pipe is connected to the surface cooler through the water inlet branch pipe, and the water outlet pipe is connected to the surface cooler through the water outlet branch pipe, so that the liquid is evenly distributed in each surface cooler, thereby improving the cooling or heating performance of the fan coil unit.

[0020] Preferably, the housing includes a back plate, a front cover, and a protective cover, the front cover and the protective cover being connected to the back plate, the water inlet pipe, the water outlet pipe and the four-port three-way valve being located inside the front cover, and the surface cooler being located inside the protective cover.

[0021] By adopting the above technical solution, the outer casing consists of a back plate, a front cover, and a protective cover, which enables the outer casing to be detachably connected. This allows for easy removal of the front cover to inspect or replace the four-port three-way valve, or removal of the protective cover to inspect or replace the surface cooler, thereby improving the convenience of the fan coil unit.

[0022] Preferably, the back plate has a connecting opening, and the water supply pipe and the return pipe are embedded in the connecting opening.

[0023] By adopting the above technical solution, during transportation, the water supply pipe and return pipe can be placed inside the outer casing, reducing the possibility of damage to the water supply pipe or return pipe due to collisions with external locations. During installation, the water supply pipe and return pipe can be removed from the connection port and connected to external pipes, thereby improving the service life of the fan coil unit.

[0024] Preferably, the back plate has reinforcing ribs connected to its sidewalls.

[0025] By adopting the above technical solutions, the structural strength of the backplate is improved, the possibility of backplate breakage is reduced, and the safety of the fan coil unit is enhanced.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. The inlet pipe, outlet pipe, supply pipe and return pipe are connected by a four-port three-way valve. When the fan coil unit stops working, the liquid that has entered the supply pipe can be directly discharged through the return pipe, reducing the energy consumption of the external water pump. The four-port three-way valve is built into the housing, eliminating the need for an external four-port three-way valve. This eliminates the need to reserve space for valve assembly during fan coil unit installation, simplifying the installation steps, reducing installation costs and improving installation efficiency.

[0028] 2. The electric valve actuator is connected to the four-port three-way valve and can be equipped with a built-in control module to remotely control the electric valve actuator, thereby regulating the four-port three-way valve and controlling the opening and closing of the inlet pipe, outlet pipe, supply pipe and return pipe, improving the convenience of water inlet and outlet control of the fan coil unit.

[0029] 3. The vent valve is connected to the water outlet pipe, which can release the gas in the water outlet pipe, ensure smooth water flow, ensure the normal operation of the fan coil unit, and improve the reliability and safety of the fan coil unit. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a wall-mounted fan coil unit driven by a fully DC motor.

[0031] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Outer shell; 11. Back plate; 111. Connecting port; 112. Reinforcing rib; 113. Groove; 114. Base plate;

[0034] 2. Cooling mechanism; 21. Surface cooler; 22. Four-port three-way valve; 221. Valve body; 2211. Connecting seat; 222. Connecting sleeve; 2221. Anti-slip strip; 23. Water inlet pipe; 231. Water inlet branch pipe; 24. Water outlet pipe; 241. Water outlet branch pipe; 242. Exhaust branch pipe; 25. Water supply pipe; 26. Water return pipe; 27. Electric valve actuator; 271. Anti-slip protrusion; 28. Air vent valve;

[0035] 3. Electrical box assembly. Detailed Implementation

[0036] The present application will be further described in detail below with reference to the accompanying drawings.

[0037] Reference Figure 1This application discloses a wall-mounted fan coil unit driven by a full DC motor, comprising a housing 1 and an electrical box assembly 3. The housing 1 includes a back plate 11, a front cover (not shown in the figure), and a protective cover (not shown in the figure). A groove 113 is provided on one side of the back plate 11 along its thickness direction. One end of the electrical box assembly 3 is fixedly connected to the bottom of the groove 113. A bottom plate 114 is fixedly connected to one side of the back plate 11 along its width direction. The surface of the bottom plate 114 near the groove 113 is flush with the groove wall, and the other surface of the bottom plate 114 is flush with the side wall of the back plate 11. A plurality of reinforcing ribs 112 are fixedly connected to the outer wall of one side of the back plate 11 along its length direction. The reinforcing ribs 112 are spaced apart along the width direction of the back plate 11. In this embodiment, five reinforcing ribs 112 are provided, and the five reinforcing ribs 112 are evenly distributed along the width direction of the back plate 11. The front cover includes a side panel and a connecting plate. The side panel is fixedly connected to the back plate 11 near the reinforcing rib 112. The connecting plate is L-shaped, with one end fixedly connected to the side surface of the side panel near the back plate 11. The distance from the other end of the connecting plate to the side panel is less than the distance from the end of the back plate 11 away from the side panel. The surface of the connecting plate away from the back plate 11 is flush with the side wall of the side panel, and the other surface of the connecting plate is in contact with the side wall of the back plate 11 and the end of the bottom plate 114 away from the back plate 11. The protective cover is located on the side of the back plate 11 near the front cover and on the side of the connecting plate away from the side panel. The end of the protective cover near the side panel has a receiving groove, and the side wall of the receiving groove near the back plate 11 has a mounting groove that penetrates the protective cover. The side of the mounting groove near the front cover penetrates the protective cover. The back plate 11 is fixedly connected to the protective cover and covers the wall of the mounting groove. The wall of the mounting groove is in contact with the side wall of the back plate 11 and the end of the bottom plate 114 away from the back plate 11.

[0038] Reference Figure 1 and Figure 2A wall-mounted fan coil unit driven by a full DC motor also includes a cooling mechanism 2. The cooling mechanism 2 includes a four-port three-way valve 22, an inlet pipe 23, an outlet pipe 24, a supply pipe 25, a return pipe 26, and an electric valve actuator 27. The four-port three-way valve 22 includes a valve body 221, a connecting sleeve 222, and a valve core (not shown in the figure). The valve body 221 is located on the side of the connecting plate near the back plate 11, and the axis of the valve body 221 is parallel to the length direction of the back plate 11. Connecting seats 2211 are fixedly connected to the outer walls of the valve body 221 on both sides along the thickness direction of the back plate 11. The axis of the connecting seat 2211 is perpendicular to the axis of the valve body 221, and the axis of the connecting seat 2211 is coplanar with the axis of the valve body 221. There are four connecting seats 2211. The axes of the four connecting seats 2211 are coplanar. The four connecting seats 2211 are divided into two groups. The two groups of connecting seats 2211 are symmetrically distributed along the axis of the connecting seats 2211. The two connecting seats 2211 in the same group are distributed at intervals along the circumference of the valve body 221. One end of the inlet pipe 23, outlet pipe 24, supply pipe 25, and return pipe 26 is fixedly connected to the connecting seat 2211. The inlet pipe 23 and outlet pipe 24 are located on the side of the valve body 221 away from the back plate 11, the inlet pipe 23 is located on the side of the return pipe 26 near the side plate, the supply pipe 25 and return pipe 26 are located on the side of the valve body 221 near the back plate 11, and the supply pipe 25 is located on the side of the return pipe 26 near the side plate. The back plate 11 is provided with a connecting port 111 on the side away from the bottom plate 114. The connecting port 111 penetrates the back plate 11 along the thickness direction of the back plate 11. The other ends of the supply pipe 25 and return pipe 26 extend out of the outer shell 1 after passing through the connecting port 111. The valve core is coaxially rotatably embedded in the valve body 221. The valve core is used to control the on / off connection between the inlet pipe 23, outlet pipe 24, supply pipe 25, and return pipe 26. An electric valve actuator 27 is fixedly connected to one end of the valve body 221 near the side plate and to the end of the electrical box assembly 3 away from the base plate 114. The electric valve actuator 27 is used to control the rotation of the valve core. A connecting sleeve 222 is connected to the side of the valve body 221 near the electric valve actuator 27. The connecting sleeve 222 and the electric valve actuator 27 are threaded together to achieve a fixed connection between the valve body 221 and the electric valve actuator 27. Several anti-slip strips 2221 are fixedly connected to the outer circumference of the connecting sleeve 222, and the anti-slip strips 2221 are evenly distributed circumferentially around the axis of the connecting sleeve 222. Several anti-slip protrusions 271 are evenly distributed on the outer circumference of the end of the electric valve actuator 27 near the valve body 221.

[0039] The cooling mechanism 2 also includes surface coolers 21. Three surface coolers 21 are embedded in a receiving groove and are spaced apart around the circumference of the receiving groove. A water inlet branch pipe 231 is fixedly connected to the outer wall of the water inlet pipe 23. The number of water inlet branch pipes 231 is the same as the number of surface coolers 21 and they correspond one-to-one. The other end of the water inlet branch pipe 231 is fixedly connected to the end of the surface cooler 21 near the electrical box assembly 3 to connect the water inlet pipe 23 to the surface cooler 21. A water outlet branch pipe 241 is fixedly connected to the outer wall of the water outlet pipe 24. The number of water outlet branch pipes 241 is the same as the number of surface coolers 21 and they correspond one-to-one. The other end of the water outlet branch pipe 241 is fixedly connected to the end of the surface cooler 21 near the electrical box assembly 3 to connect the water outlet pipe 24 to the surface cooler 21.

[0040] An exhaust branch pipe 242 is provided on the side of the water outlet pipe 24 away from the water inlet pipe 23. The axis of the exhaust branch pipe 242 is parallel to the axis of the valve body 221, and the axis of the exhaust branch pipe 242 is coplanar with the axis of the water outlet pipe 24. The cooling mechanism 2 also includes a vent valve 28, which is fixedly connected to the end of the exhaust branch pipe 242 away from the water outlet pipe 24.

[0041] The implementation principle of a wall-mounted fan coil unit driven by a full DC motor in this application embodiment is as follows: During assembly, the surface cooler 21 is embedded in the receiving groove, the back plate 11 is embedded in the mounting groove and fixedly connected to the protective cover, the electrical box assembly 3 is fixedly connected to the bottom of the groove 113, the four-port three-way valve 22 is connected to the electric valve actuator 27, the electric valve actuator 27 is fixedly connected to the electrical box assembly 3, one end of the inlet pipe 23, the outlet pipe 24, the supply pipe 25 and the return pipe 26 are fixedly connected to the connecting seat 2211, the inlet branch pipe 231 and the outlet branch pipe 241 are connected to the surface cooler 21, the supply pipe 25 and the return pipe 26 extend out of the outer shell 1 after passing through the connecting port 111, the vent valve 28 is fixedly connected to the exhaust branch pipe 242, and then the front cover is connected to the back plate 11 and the bottom plate 114 to realize the assembly of the outer shell 1.

[0042] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A wall-mounted fan coil unit driven entirely by a DC motor, characterized in that: It includes a housing (1), a surface cooler (21), an inlet pipe (23), an outlet pipe (24), a four-port three-way valve (22), a water supply pipe (25), and a return pipe (26); the surface cooler (21), the inlet pipe (23), the outlet pipe (24), and the four-port three-way valve (22) are located inside the housing (1); one end of the inlet pipe (23), the outlet pipe (24), the water supply pipe (25), and the return pipe (26) is connected to the four-port three-way valve (22); the inlet pipe (23) and the outlet pipe (24) are connected to the surface cooler (21); the other end of the water supply pipe (25) and the return pipe (26) extends out of the housing (1).

2. The wall-mounted fan coil unit driven by a full DC motor according to claim 1, characterized in that: It also includes an electric valve actuator (27); the electric valve actuator (27) is connected to a four-port three-way valve (22); the electric valve actuator (27) is used to control the on / off of the inlet pipe (23), the outlet pipe (24), the supply pipe (25) and the return pipe (26).

3. The wall-mounted fan coil unit driven by a full DC motor according to claim 2, characterized in that: The four-port three-way valve (22) includes a valve body (221) and a connecting sleeve (222); the electric valve actuator (27) is connected to one end of the valve body (221); the connecting sleeve (222) is connected to the valve body (221); the connecting sleeve (222) is threadedly connected to the electric valve actuator (27) to achieve a fixed connection between the valve body (221) and the electric valve actuator (27); a number of anti-slip strips (2221) are connected to the outside of the connecting sleeve (222); the number of anti-slip strips (2221) are distributed circumferentially around the connecting sleeve (222).

4. The all-DC motor driven wall-mounted fan coil unit according to claim 3, characterized in that: The electric valve actuator (27) has several anti-slip protrusions (271) evenly distributed on the outer periphery of the end near the valve body (221).

5. The all-DC motor driven wall-mounted fan coil unit according to claim 1, characterized in that: It also includes an air release valve (28); the air release valve (28) is connected to the water outlet pipe (24).

6. The wall-mounted fan coil unit driven by a full DC motor according to claim 1, characterized in that: The surface cooler (21) is provided in several units; the side wall of the water inlet pipe (23) is connected to the water inlet branch pipe (231); the number of the water inlet branch pipe (231) is the same as the number of surface coolers (21) and they correspond one-to-one; the other end of the water inlet branch pipe (231) is connected to the surface cooler (21); the side wall of the water outlet pipe (24) is connected to the water outlet branch pipe (241); the number of the water outlet branch pipe (241) is the same as the number of surface coolers (21) and they correspond one-to-one; the other end of the water outlet branch pipe (241) is connected to the surface cooler (21).

7. The wall-mounted fan coil unit driven by a fully DC motor according to claim 1, characterized in that: The outer casing (1) includes a back plate (11), a front cover and a protective cover; the front cover and the protective cover are connected to the back plate (11); the water inlet pipe (23), the water outlet pipe (24) and the four-port three-way valve (22) are located inside the front cover; the surface cooler (21) is located inside the protective cover.

8. The wall-mounted fan coil unit driven by a fully DC motor according to claim 7, characterized in that: The back panel (11) is provided with a connecting port (111); the water supply pipe (25) and the return water pipe (26) are embedded in the connecting port (111).

9. The all-DC motor driven wall-mounted fan coil unit according to claim 7, characterized in that: The back plate (11) is connected to a reinforcing rib (112) on its side wall.

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