Return air and fresh air mixing valve

Abstract

The utility model relates to the technical field of mixing valves, in particular to a return air and fresh air mixing valve which comprises an air pipe, the upper end of the air pipe communicates with a refrigerating channel and a heating channel at intervals in the length direction, and the lower end of the air pipe communicates with an indoor return air pipe and an outdoor fresh air pipe at intervals in the length direction; first air valve plates are rotationally installed between the indoor air return pipe and the refrigeration channel and between the outdoor fresh air pipe and the heating channel, a second air valve plate is rotationally installed in the air pipe and located between the two first air valve plates, the first air valve plates and the second air valve plate are vertically arranged, and small holes are formed in the second air valve plate; all the first air valve plates and the second air valve plates are connected through chain transmission, and the chain transmission is driven by a motor. According to the scheme, through chain transmission, all the first air valve plates and the second air valve plates are synchronously deflected, synchronously started and controlled in a centralized mode, overall regulation and control are facilitated, and the situation that conveying of airflow in an air pipe is affected due to the fact that the position state of a certain air valve plate is incorrect during single control is avoided; and compared with single control and single adjustment, the operation is saved, more labor is saved, and convenience is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of mixing valves, and in particular to a return air and fresh air mixing valve. Background Art

[0002] Combined air conditioners are generally composed of more than three functional sections, such as primary return air section, surface cooling water retaining section, heating section, humidification section, secondary return air section, fan section, silencer section, medium efficiency filtration section, sterilization section and heat recovery section. Different air treatment requirements can be achieved through the combination of different functional sections.

[0003] The air conditioning unit needs to use a mixing section to mix the system return air and fresh air. Usually, air valves are installed at the return air outlet and the fresh air outlet, and the linkage between the air valves can achieve fresh air mixing or old air circulation. However, the traditional air valve is a single control component, which cannot be controlled synchronously, and it is troublesome to adjust one by one; and the combined air conditioner is generally large in size and has many pipes. If it cannot be controlled synchronously, then the operation of the entire air conditioning system will be more cumbersome and the manpower burden will be heavy.

[0004] To this end, the present application provides a return air and fresh air mixing valve, so that air valves in different parts are connected and controlled synchronously, so as to simplify operation and reduce workload. Utility Model Content

[0005] The purpose of the present application is to solve the problems existing in the prior art and to propose a return air and fresh air mixing valve.

[0006] In order to achieve the above purpose, this application adopts the following technical solutions:

[0007] A return air and fresh air mixing valve comprises an air duct, wherein the upper end of the air duct is connected with a refrigeration channel and a heating channel at intervals along the length direction, and the lower end of the air duct is connected with an indoor return air duct and an outdoor fresh air duct at intervals along the length direction; an air valve piece 1 is rotatably installed between the indoor return air duct and the refrigeration channel, and between the outdoor fresh air duct and the heating channel, and an air valve piece 2 is rotatably installed between two air valve pieces 1 in the air duct, the air valve piece 1 and the air valve piece 2 are vertically arranged, and a small hole is provided on the air valve piece 2; all the air valve pieces 1 and the air valve pieces 2 are connected by a chain drive, and the chain drive is driven by a motor.

[0008] Preferably, an air drying component is provided in the refrigeration channel.

[0009] Preferably, baffles are provided on both sides of the upper and lower ends of all air valve pieces 1 and 2 in the air duct, electromagnets are embedded in the baffles, and metal sheets are provided at both ends of air valve piece 1 and air valve piece 2.

[0010] Preferably, a sealing gasket is provided on the surface of the baffle plate that contacts the first air valve plate and the second air valve plate.

[0011] Preferably, a brake is provided on the output shaft of the motor.

[0012] Preferably, a stirring fan is provided in the refrigeration channel below the air drying component.

[0013] Compared with the prior art, the present application provides a return air fresh air mixing valve, which has the following beneficial effects:

[0014] This solution uses chain transmission to make all air valve pieces 1 and 2 deflect synchronously, start synchronously, and be centrally controlled, which is convenient for overall regulation and avoids the situation in which the position state of a certain air valve piece is incorrect during single control and affects the delivery of airflow in the air duct; compared with single control and single adjustment, it saves operation, is more labor-saving and convenient.

[0015] Other advantages, objectives and features of the present application will be described in the following description to some extent; and will be apparent to those skilled in the art based on the following examination and study to some extent; or, may be taught from the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an axial view of the present application.

[0017] Figure 2 This is a schematic diagram of the air valve plate 1 and the air valve plate 2 of the present application being connected via a chain drive.

[0018] Figure 3 This is a schematic diagram of the position status of air valve plate 1 and air valve plate 2 in the winter mode of the present application.

[0019] Figure 4 This is a schematic diagram of the position status of air valve plate 1 and air valve plate 2 in the summer mode of the present application.

[0020] Figure 5 For this application Figure 4 A partial schematic diagram of the circled area.

[0021] Figure 6 This is another schematic diagram of a driving structure of the present application.

[0022] In the figure: 1. air duct; 2. cooling channel; 3. heating channel; 4. indoor return air duct; 5. outdoor fresh air duct; 6. air valve plate 1; 7. air valve plate 2; 8. small hole; 9. chain drive; 10. baffle; 11. stirring fan; 12. air drying component; 13. air filter box. DETAILED DESCRIPTION

[0023] The following will be combined with the attached examples of the present application Figure 1-6, the technical solutions in the embodiments of the present application are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0024] In order to solve the problems existing in the prior art, the present embodiment provides a return air and fresh air mixing valve, including an air duct 1, wherein the upper end of the air duct 1 is connected with a refrigeration channel 2 and a heating channel 3 at intervals along the length direction, and the lower end of the air duct 1 is connected with an indoor return air duct 4 and an outdoor fresh air duct 5 at intervals along the length direction; an air valve piece 6 is rotatably installed between the indoor return air duct 4 and the refrigeration channel 2, and between the outdoor fresh air duct 5 and the heating channel 3, and an air valve piece 2 7 is rotatably installed between the two air valve pieces 1 6 in the air duct 1, the air valve piece 1 6 and the air valve piece 2 7 are vertically arranged, and a small hole 8 is provided on the air valve piece 2 7; all air valve pieces 1 6 and air valve pieces 2 7 are connected by a chain drive 9, and the chain drive 9 is driven by a motor.

[0025] Principle details of this embodiment:

[0026] A return air fresh air mixing valve comprises an air duct 1. A cooling channel 2 and a heating channel 3 are staggered at intervals at the upper end of the air duct 1 along the length direction, and an indoor return air duct 4 and an outdoor fresh air duct 5 are staggered at intervals at the lower end of the air duct 1 along the length direction. The indoor return air duct 4 is located on the side of the cooling channel 2 facing the heating channel 3 and the axes are staggered, and the outdoor fresh air duct 5 is located on the side of the heating channel 3 away from the cooling channel 2 and the axes are staggered. The indoor return air duct 4 is located between the cooling channel 2 and the heating channel 3, and the outdoor fresh air duct 5 is located on the side of the heating channel 3 away from the cooling channel 2.

[0027] The output end of the cooling channel 2 is connected to a cooling unit, such as a compressor or a refrigerator, for air cooling. The output end of the heating channel 3 is connected to a solar collector (a device that absorbs solar radiation and transfers the generated heat energy to a heat transfer medium) for air heating. The air inlet end of the indoor return air duct 4 extends to the indoor room, and the air inlet end of the outdoor fresh air duct 5 extends to the outdoor room. In the figure, only the connecting parts of the cooling channel 2, the heating channel 3, the indoor return air duct, the outdoor fresh air duct 5 and the air duct 1 are shown, and the extended part is not shown.

[0028] Air valve piece 1 6 is rotatably installed between the indoor return air duct 4 and the cooling channel 2, and between the outdoor fresh air duct 5 and the heating channel 3. Air valve piece 2 7 is rotatably installed between the indoor return air duct and the heating channel 3 in the air duct 1, and small holes 8 are provided on air valve piece 2 7. Air valve piece 1 6 and air valve piece 2 7 are installed vertically during installation. All air valve pieces 1 6 and air valve pieces 2 7 are connected together via a chain drive 9, and the chain drive 9 is driven by a motor fixedly installed on the outer wall of the air duct 1.

[0029] The air inlet ends of the outdoor fresh air pipe 5 and the indoor return air pipe 4 are both equipped with air filter boxes 13, which are used to filter out floating objects suspended in the air, such as fluff, tiny particles, etc., and absorb odors to purify the air. For example, an activated carbon box.

[0030] In this embodiment, both the cooling channel 2 and the heating channel 3 are provided with exhaust devices such as fans to ensure the flow and transportation of gas.

[0031] In this embodiment, the chain drive 9 includes sprockets fixed on the rotating shafts of the air valve plate 1 6 and the air valve plate 2 7, all of which are covered with chains, and the rotating shaft of one of the sprockets is connected to the output end of the motor. The sprockets and chains are both located outside the air duct 1.

[0032] There are two states when in use:

[0033] (1) Winter status: refer to the attached Figure 3 As shown, at this time, the air valve plate 1 6 is vertical and cuts off the inner cavity of the air duct 1, and the air valve plate 2 7 is horizontal. At this time, the indoor air enters the air duct 1 from the indoor return air duct 4, and the air flow system of the refrigeration unit is closed, and the outdoor fresh air does not circulate. After the indoor air enters the air duct 1, it enters the heating channel 3 and enters the solar collector for heating, and then enters the room for indoor heating.

[0034] (2) Summer status: refer to the attached Figure 4 As shown, the motor drives all the air valve plates 1 6 and 2 7 on the same section of the air duct 1 to deflect synchronously through the chain drive 9, so that the air valve plate 1 6 is in a horizontal state and the air valve plate 2 7 is deflected in a vertical state to cut off the inner cavity of the air duct 1. At this time, the indoor gas and the outdoor fresh air enter the air duct 1 from the indoor return air duct 4 and the outdoor fresh air duct 5 respectively. Since there is a small hole 8 on the air valve 2, the outdoor fresh air enters the air duct and passes through the small hole 8 to contact and mix with the indoor return air on the other side of the air valve 2. The mixed gas enters the refrigeration unit through the refrigeration channel 2 for refrigeration, and then is input into the room to cool the room. In this process, the fresh air intake of the heating unit and the hot air input after heating can be started or closed according to specific needs.

[0035] In summary, this solution uses chain drive 9 to make all air valve pieces 1 6 and air valve pieces 2 7 deflect synchronously, start synchronously, and be centrally controlled, which is convenient for overall regulation and avoids the situation in which the position state of a certain air valve piece is incorrect during single control and affects the delivery of airflow in the air duct 1; compared with single control and single adjustment, it saves operation, is more labor-saving and convenient.

[0036] In this embodiment, another structure is provided to replace the motor for driving operation: Gear 1 is installed on the rotating shaft of the first sprocket, and Gear 1 meshes with Gear 2 which is rotatably installed on the outer wall of the air duct 1. The module of Gear 2 is greater than that of Gear 1, which amplifies the rotation angle. Connecting rod 1 is sleeved on the rotating shaft of Gear 2, and the end of connecting rod 1 is rotatably connected to connecting rod 2, and the end of connecting rod 2 is rotatably connected to a slider which is slidably installed on the outer wall of the air duct 1. The end of the slider is a metal block, and a spring is provided between the metal block and the air duct 1. An electromagnet which cooperates with the metal block is provided on the outer wall of the air duct 1.

[0037] There are also two states when in use. In the winter state, as shown in the attached Figure 6 As shown, the electromagnet is not energized at this time. In the summer state, the electromagnet is energized to attract the metal block, so that the slider is close to the electromagnet and the spring is stretched. The slider drives the gear 2 to deflect through the connecting rod 2 and the connecting rod 1, and the gear 2 drives the gear 1 to deflect, so that the drive chain transmission starts and drives the air valve piece 1 6 and the air valve piece 2 7 to deflect, so that the air valve piece 1 6 and the air valve piece 2 are changed to the summer state.

[0038] In a further embodiment of the present scheme, an air drying component 12 is provided in the refrigeration channel 2 for filtering moisture in the air and generating dry cold air, which can not only reduce the need for cleaning and collecting work due to subsequent condensation of cold air, but also prevent indoor humidity.

[0039] In a further embodiment of the present scheme, baffles 10 are provided at both sides of the upper and lower ends of all air valve pieces 1 6 and air valve pieces 2 7 in the air duct 1, electromagnets are embedded in the baffles 10, and metal sheets are provided at both ends of air valve pieces 1 6 and air valve pieces 2 7. When air valve piece 1 6 or air valve piece 2 7 is in a vertical state, the electromagnet is energized to generate magnetic attraction, so that the end of air valve piece 1 6 or air valve piece 2 7 is closely fitted with the baffle 10, which can improve the cut-off sealing performance of air valve piece 1 6 and air valve piece 2 7 in a vertical state, and can also improve the stability of the vertical state of air valve piece 1 6 and air valve piece 2 7, thereby reducing the burden of the torque generated by the motor output shaft blocking the wind force.

[0040] In a further embodiment of this scheme, the baffle 10 is provided with a sealing gasket on the contacting side with the air valve plate 1 6 and the air valve plate 2 7, so as to improve the sealing performance of the air duct 1 when the air valve plate 1 6 and the air valve plate 2 7 are in a vertical state.

[0041] In a further embodiment of the present invention, a brake is provided at the output shaft of the motor. The brake of the motor is the motor brake, which is used to prevent the motor from moving due to external force and causing danger when the motor is in a stationary state and loses power. This is to ensure the braking performance of the motor and prevent the deflection of the air valve plate 1 6 or the air valve plate 2 7 in a vertical state.

[0042] In a further embodiment of the present invention, a stirring fan 11 is provided in the refrigeration channel 2 below the air drying assembly 12, and the stirring fan 11 is driven by a motor fixed to the outer wall of the air duct 1. In the summer state, the stirring fan 11 stirs the indoor return air and the outdoor fresh air to fully mix them, thereby ensuring that the composition of the cold air input into the room is uniform.

[0043] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed in the present application according to the technical solution and application concept of the present application, which should be covered by the protection scope of the present application.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0045] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A return air and fresh air mixing valve, characterized in that: The invention comprises an air duct (1), wherein the upper end of the air duct (1) is connected with a cooling channel (2) and a heating channel (3) at intervals along the length direction, and the lower end of the air duct (1) is connected with an indoor return air duct (4) and an outdoor fresh air duct (5) at intervals along the length direction; an air valve plate (6) is rotatably installed between the indoor return air duct (4) and the cooling channel (2), and between the outdoor fresh air duct (5) and the heating channel (3); an air valve plate (7) is rotatably installed between the two air valve plates (6) in the air duct (1); the air valve plate (6) and the air valve plate (7) are arranged vertically, and a small hole (8) is provided on the air valve plate (7); all the air valve plates (6) and the air valve plates (7) are connected by a chain drive (9), and the chain drive (9) is driven by a motor.

2. A return air fresh air mixing valve according to claim 1, characterized in that: An air drying component (12) is provided in the refrigeration channel (2).

3. A return air fresh air mixing valve according to claim 1, characterized in that: Baffles (10) are provided on both sides of the upper and lower ends of all air valve pieces 1 (6) and air valve pieces 2 (7) in the air duct (1), and electromagnets are embedded in the baffles (10). Metal sheets are provided at both ends of air valve pieces 1 (6) and air valve pieces 2 (7).

4. A return air fresh air mixing valve according to claim 3, characterized in that: The baffle (10) is provided with a sealing gasket on the surface in contact with the first air valve plate (6) and the second air valve plate (7).

5. The return air and fresh air mixing valve according to claim 1, characterized in that: A holding brake is arranged at the output shaft of the motor.

6. A return air fresh air mixing valve according to claim 2, characterized in that: A stirring fan (11) is provided in the refrigeration channel (2) below the air drying component (12).

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