Flat and urgent combined air handling unit

Abstract

The utility model relates to the technical field of air treatment, in particular to a flat and urgent combined air treatment unit which comprises an air supply box body, an air inlet end of the air supply box body is communicated with the outside, an air feeder is arranged at an air outlet end of the air supply box body, and an air supply outlet of the air feeder is communicated with the inside; a return fan, a return air valve, an exhaust valve and at least one first filter are arranged in the air return and exhaust box body, the air inlet end of the air return and exhaust box body is communicated with the indoor space, the first filter is detachably arranged between the return fan and the air inlet end of the air return and exhaust box body, and the air return and exhaust box body is provided with a return air inlet and an exhaust outlet; the air return port communicates with the air inlet end of the air supply box through an air return valve, and the air exhaust port communicates with the outside through an air exhaust valve. The ordinary-emergency combined air handling unit can be switched between the ordinary working condition and the emergency working condition, the ordinary comfortable air conditioning function can be achieved, and meanwhile the emergency public health event can be dealt with.

Description

Technical Field

[0001] The utility model relates to the technical field of air treatment, in particular to a flat and emergency combined air treatment unit. Background Art

[0002] At present, for large-space functional places, the terminal air-conditioning units often use combined air handling units, which are generally installed in the machine room. The indoor return air and outdoor fresh air are mixed and centrally processed by the air handling unit before being sent to the large-space air-conditioning area through the main supply air duct.

[0003] However, conventional air handling units can often only meet the needs of comfort air conditioning. Once an emergency public health incident occurs, emergency conversion cannot be achieved. The unit needs to be replaced or modified on-site, and it is impossible to respond to the emergency public health incident in a timely manner. Utility Model Content

[0004] The purpose of the utility model is to provide a combined normal and emergency air handling unit, which solves the problem that conventional air handling units in the prior art cannot achieve the demand for rapid switching of working conditions to respond to public health emergencies, or even if they can achieve fresh air operation, the exhaust part may not be able to fully meet the needs of fresh air changes. At the same time, the exhaust part cannot be equipped with a filter, and the filtering requirements for exhaust air are not met, resulting in the problem that normal use under emergency conditions cannot be achieved.

[0005] In order to achieve the above object, the utility model provides a flat and emergency combined air handling unit, comprising:

[0006] The air supply box has an air inlet end connected to the outside, and an air supply fan is arranged at the air outlet end of the air supply box, and the air supply port of the air supply fan is connected to the indoor room;

[0007] The return and exhaust air box includes a return air fan, a return air valve, an exhaust valve and at least one first filter. The air inlet end of the return and exhaust air box is connected to the indoor room. The first filter is detachably arranged between the return air fan and the air inlet end of the return and exhaust air box. The return and exhaust air box has a return air port and an exhaust port. The return air port is connected to the air inlet end of the supply air box through the return air valve, and the exhaust port is connected to the outdoor room through the exhaust valve.

[0008] Optionally, an air supply valve is provided at the air inlet end of the air supply box.

[0009] Optionally, at least one of the return air valve, the exhaust air valve and the supply air valve is an electric regulating air valve.

[0010] Optionally, at least one of the first filters is a high efficiency filter.

[0011] Optionally, at least one second filter is further provided in the air supply box.

[0012] Optionally, the air supply box is also provided with an air conditioning hot and cold water coil.

[0013] Optionally, a humidifier is also provided in the air supply box.

[0014] Optionally, a water baffle is further provided in the air supply box, and the water baffle is located between the humidifier and the air supply fan.

[0015] Optionally, the supply air fan and the return air fan are arranged vertically or horizontally.

[0016] Optionally, both the supply fan and the return fan are variable frequency fans.

[0017] In the flat and emergency combined air handling unit provided by the utility model, it is possible to switch between the following two working modes (or working conditions):

[0018] In the first working mode (i.e., normal working condition), the return air valve and the exhaust air valve are opened at the same time, the air supply box provides fresh air to the room, part of the return air from the return and exhaust air box is discharged to the outside through the exhaust air valve, and the remaining return air enters the air supply box through the return air valve. In this mode, the first filter is not enabled;

[0019] In the second working mode (emergency condition), the return air valve is closed, the exhaust valve is opened, the supply air box provides fresh air to the room, and all the return air from the return and exhaust air box is discharged to the outside through the exhaust valve. In this mode, the first filter is normally activated to meet the filtering requirements for exhaust air.

[0020] The flat and emergency combined air handling unit has at least one of the following beneficial effects:

[0021] 1) It can meet the comfort air conditioning function in normal times and can also respond to public health emergencies. It only needs to install the first filter and close the return air valve to achieve rapid conversion between normal and emergency conditions;

[0022] 2) The first filter is detachably installed. Under normal working conditions, it is generally not necessary to install the first filter to reduce the system resistance during normal operation and save the operating energy consumption of the return air fan. The first filter is only installed under emergency conditions to achieve the discharge of exhaust air after filtering under emergency conditions;

[0023] 3) The return air valve, exhaust air valve and supply air valve can all use electric regulating air valves. Through the combined control of the above three valves (such as by adjusting the opening changes of each valve), the ratio between the fresh air, return air and exhaust air of the entire air handling unit can be adjusted, and the unit can be adjusted steplessly in all operating conditions from the minimum fresh air volume to the full fresh air operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Those skilled in the art should understand that the drawings provided are for a better understanding of the present invention and do not constitute any limitation on the scope of the present invention.

[0025] Figure 1 A schematic structural diagram of a flat and emergency combined air handling unit provided in one embodiment of the utility model.

[0026] in:

[0027] 1-supply fan; 2-air supply port of the supply fan; 3-return fan; 4-return air valve; 5-exhaust valve; 6-first filter; 7-air inlet end of the return and exhaust air box; 8-supply air valve; 9-second filter; 10-air conditioning hot and cold water coil; 11-humidifier; 12-water baffle. DETAILED DESCRIPTION

[0028] In order to make the purpose, advantages and features of the present utility model clearer, the present utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the implementation method of the present utility model. In order to make the purpose, features and advantages of the present utility model more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Any modification of the structure, change in the proportional relationship or adjustment of the size, in the case of the same or similar effects and purposes that can be achieved by the present utility model, should still fall within the scope of the technical content disclosed by the present utility model.

[0029] As used in the present invention, the singular forms "one", "an", and "the" include plural objects, unless the content clearly indicates otherwise. As used in the present invention, the term "or" is generally used in a sense that includes "and / or", unless the content clearly indicates otherwise. As used in the present invention, the term "several" is generally used in a sense that includes "at least one", unless the content clearly indicates otherwise. As used in the present invention, the term "at least two" is generally used in a sense that includes "two or more", unless the content clearly indicates otherwise. In addition, the terms "first", "second", and "third" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include one or at least two of the features.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Please refer to Figure 1 This embodiment provides a combined air handling unit including:

[0032] The air supply box has an air inlet end connected to the outside, and an air supply fan 1 is arranged at the air outlet end of the air supply box, and an air supply port 2 of the air supply fan 1 is connected to the indoor room;

[0033] The return and exhaust air box includes a return air fan 3, a return air valve 4, an exhaust valve 5 and at least one first filter 6. The air inlet end 7 of the return and exhaust air box is connected to the indoor room. The first filter 6 is detachably arranged between the return air fan 3 and the air inlet end 7 of the return and exhaust air box. The return and exhaust air box has a return air port and an exhaust port. The return air port is connected to the air inlet end of the supply air box through the return air valve 4, and the exhaust port is connected to the outdoors through the exhaust valve 5.

[0034] The air supply box is used to provide fresh air to the room, the air supply fan is used to provide air supply power, the return and exhaust air box is used for indoor return and exhaust air, and the return fan 3 provides return and exhaust power.

[0035] In this embodiment, the flat and emergency combined air handling unit switches between the following two working modes (or working conditions):

[0036] In the first working mode (i.e., normal working condition), the return air valve 4 and the exhaust air valve 5 are opened at the same time, the air supply box provides fresh air to the room, part of the return air from the exhaust air box is discharged to the outside through the exhaust air valve 5, and the remaining return air enters the air supply box through the return air valve 4. In this mode, the first filter 6 is not enabled;

[0037] In the second working mode (emergency condition), the return air valve 4 is closed, the exhaust air valve 5 is opened, the supply air box provides fresh air to the room, and all the return air from the return and exhaust air box is discharged to the outside through the exhaust air valve 5. In this mode, the first filter 6 is normally enabled to meet the filtering requirements for exhaust air.

[0038] Therefore, the combined normal and emergency air handling unit provided in this embodiment can switch between normal and emergency working conditions. While meeting the normal comfort air conditioning function, it can also respond to public health emergencies. It only needs to install the first filter 6 and close the return air valve 4 to achieve rapid conversion between normal and emergency working conditions.

[0039] In this embodiment, the return air inlet and the exhaust air outlet of the return and exhaust air box are respectively provided with a return air valve 4 and an exhaust air valve 5, and the return air valve 4 and the exhaust air valve 5 are respectively used to control the return air and the exhaust air. In addition, the air supply valve 8 is provided at the air inlet end of the air supply box, and the air supply valve 8 is used to control the air supply. In this embodiment, each valve can be a switch valve for controlling the on and off of the pipeline, or a regulating valve for regulating the flow of the pipeline, and the utility model does not limit this. At the same time, each valve can be a manual valve or an automatic valve, such as an electric valve, a pneumatic valve, etc., which can be selected according to needs, and the utility model does not limit this.

[0040] Preferably, at least one of the return air valve 4, the exhaust air valve 5 and the supply air valve 8 is an electrically adjustable air valve. More preferably, the return air valve 4, the exhaust air valve 5 and the supply air valve 8 are all electrically adjustable air valves, and the ratio between the fresh air, the return air and the exhaust air of the entire air handling unit can be adjusted by combined control of the above three valves (such as by adjusting the opening change of each valve), and the unit can be steplessly adjusted in all working conditions from the minimum fresh air volume to the full fresh air operation.

[0041] In this embodiment, at least one first filter 6 is provided in the return air box, and its main function is to filter and purify the return air of the return fan 3. Therefore, according to the filtering requirements (such as filtering accuracy, filtering efficiency, etc.), one first filter 6 can be provided, or two or more first filters 6 can be provided in series, and the utility model does not limit this. When there are at least two first filters 6, the filtering accuracy and / or filtering efficiency of the two first filters 6 can be different.

[0042] In a preferred embodiment, the first filter 6 is one and a high efficiency filter is selected.

[0043] In this embodiment, the first filter 6 is detachably arranged between the return air fan 3 and the air inlet end 7 of the return and exhaust air box. This is equivalent to reserving an installation position for the first filter 6. Under normal working conditions, the first filter 6 is generally not required to be installed to reduce the system resistance of normal operation and save the operating energy consumption of the return air fan 3. The high-efficiency filter 5 is only installed under emergency conditions (such as public health emergencies) to achieve the discharge of exhaust air after filtering under emergency conditions. Preferably, the detachable method is, for example, a drawer-type installation, which is convenient for disassembly and assembly.

[0044] Preferably, at least one second filter 9 is also provided in the air supply box, and the second filter 9 is used to filter the fresh air entering from the air inlet end of the air supply box and the return air flowing into the return and exhaust air box. Similarly, according to the filtering requirements (such as filtering accuracy, filtering efficiency, etc.), one second filter 9 can be provided, or two or more second filters 9 can be provided in series, and the utility model does not limit this. When there are at least two second filters 9, the filtering accuracy and / or filtering efficiency of the two second filters 9 can be different.

[0045] In a preferred embodiment, there are two second filters 9, and the two first filters 6 are respectively a coarse-effect filter and a medium-effect filter. The coarse-effect filter is closer to the air inlet end of the air supply box than the medium-effect filter.

[0046] Preferably, the air supply box is also provided with an air conditioning hot and cold water coil 10. When chilled water or hot water flows through the coil, heat is exchanged with the air supply outside the tube, so that the air is cooled or heated to adjust the indoor air supply temperature. In this embodiment, the air conditioning hot and cold water coil 10 is located between the first filter 6 and the air supply fan 1.

[0047] Preferably, a humidifier 11 is also provided in the air supply box. The humidifier 11 can be used to humidify the air supply in winter to avoid room filtration and drying. In this embodiment, the humidifier 11 is located between the air conditioning hot and cold water coil 10 and the air supply fan 1.

[0048] Furthermore, a water baffle 12 is provided in the air supply box, and the water baffle 12 is located between the humidifier 11 and the air blower 1. The water baffle 12 is used to block and intercept the floating water in the humidification process of the humidifier 11, so as to prevent water droplets from entering the air blower 1 or the air supply box and causing adverse effects.

[0049] In this embodiment, the air supply fan 1 and the return air fan 3 are arranged vertically. Of course, the air supply fan 1 can also be arranged horizontally with the return air fan 3, and the utility model does not limit this.

[0050] Preferably, both the supply fan 1 and the return fan 3 are variable frequency fans. The variable frequency operation mode can cooperate with each valve to meet different working conditions and also play a role in energy saving.

[0051] The specific working mode of the combined air handling unit provided in this embodiment is as follows:

[0052] 1) Under normal daily use conditions, the supply fan 1 provides the power for supplying air, the return fan 3 provides the power for returning and exhausting air, the return fan 3 operates at a variable frequency, and the return air valve 4, the exhaust air valve 5 and the supply air valve 8 maintain a fixed opening to fix the ratio between fresh air, return air and exhaust air, so as to meet the operating requirement of the constant fresh air ratio under normal working conditions, and the air volume of the supply and exhaust air is basically balanced;

[0053] 2) When outdoor air can be used for free cooling in the transition season (i.e., the outdoor temperature is lower than the indoor temperature), and the fresh air volume needs to be increased, the supply fan 1 is used to provide air supply power, and the return fan 3 is used to provide return air and exhaust air power. The return fan 3 operates with variable frequency, increases the opening of the exhaust valve 5 and the supply air valve 8, and reduces the opening of the return air valve 4 to increase the fresh air volume and exhaust air volume, and reduce the return air volume, thereby increasing the fresh air ratio and meeting the operation demand of increasing the fresh air ratio in the normal transition season;

[0054] 3) When switched to emergency operation, the first filter 6 is installed, the supply fan 1 is used to provide air supply power, the return fan 3 is used to provide exhaust power, the return fan 3 increases the operating frequency, the exhaust valve 5 and the supply valve 8 are fully opened, and the return air valve 4 is closed, so as to achieve 100% return air discharged to the outside through the exhaust valve 5, and all supply air enters the room through the supply air valve 8, achieving 100% fresh air, meeting the demand for fresh air operation under emergency conditions.

[0055] In summary, the embodiment of the utility model provides a combined normal and emergency air handling unit, which adopts a dual fan design consisting of a supply fan + a return fan. The supply fan is used to provide air supply power, and the return fan is used to provide return air and exhaust power. The supply fan and the return fan can adjust the ratio between fresh air, return air and exhaust air by adjusting the opening of each valve according to the operating needs of the system, and can achieve stepless adjustment of the unit from the minimum fresh air volume to the full fresh air operation. At the same time, the first filter can be quickly installed as needed to meet the conversion needs of the normal and emergency combined working conditions.

[0056] In addition, it should be recognized that although the present invention has been disclosed as a preferred embodiment, the above embodiment is not intended to limit the present invention. For any technician familiar with the art, without departing from the scope of the technical solution of the present invention, the above disclosed technical content can be used to make many possible changes and modifications to the technical solution of the present invention, or modified into equivalent embodiments of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A combined air handling unit, characterized in that: include: The air supply box has an air inlet end connected to the outside, and an air supply fan is arranged at the air outlet end of the air supply box, and the air supply port of the air supply fan is connected to the indoor room; The return and exhaust air box is provided with a return air fan, a return air valve, an exhaust valve and at least one first filter. The air inlet end of the return and exhaust air box is connected with the indoor room. The first filter is detachably arranged between the return air fan and the air inlet end of the return and exhaust air box. The return and exhaust air box has a return air port and an exhaust port. The return air port is connected with the air inlet end of the supply air box through the return air valve, and the exhaust port is connected with the outdoor room through the exhaust valve.

2. The flat and emergency combined air handling unit according to claim 1, characterized in that: An air supply valve is arranged at the air inlet end of the air supply box.

3. The flat and emergency combined air handling unit according to claim 2, characterized in that: At least one of the return air valve, the exhaust air valve and the supply air valve is an electric regulating air valve.

4. The flat and emergency combined air handling unit according to claim 1, characterized in that: At least one of the first filters is a high efficiency filter.

5. The flat and emergency combined air handling unit according to claim 1, characterized in that: At least one second filter is also arranged in the air supply box.

6. The flat and emergency combined air handling unit according to claim 1, characterized in that: The air supply box is also provided with an air conditioning hot and cold water coil.

7. The flat and emergency combined air handling unit according to claim 1, characterized in that: A humidifier is also arranged in the air supply box.

8. The flat and emergency combined air handling unit according to claim 7, characterized in that: A water baffle is also provided in the air supply box, and the water baffle is located between the humidifier and the air supply fan.

9. The flat and emergency combined air handling unit according to claim 1, characterized in that: The supply air fan and the return air fan are arranged vertically or horizontally.

10. The flat and emergency combined air handling unit according to claim 1, characterized in that: The supply air fan and the return air fan are both variable frequency fans.

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