Multifunctional anti-freezing fresh air handling unit

Abstract

The utility model relates to a multifunctional anti-freezing fresh air handling unit which comprises a fresh air handling unit, an air inlet assembly and an air outlet pipe, the air inlet assembly and the air outlet pipe are arranged at the two ends of the fresh air handling unit, and the multifunctional anti-freezing fresh air handling unit is characterized by further comprising a fresh air preheating anti-freezing bypass assembly. And the fresh air preheating anti-freezing bypass assembly comprises a bypass air pipe and a second electric adjusting air valve arranged on the pipeline, the two ends of the bypass air pipe communicate with the air mixing section and the flow equalizing bypass section correspondingly, and the treated fresh air flows into the air mixing section through the fresh air preheating anti-freezing bypass assembly and the flow equalizing bypass section of the fresh air handling unit in a bypass mode. The outdoor fresh air is preheated and precooled, the air conditioner water coil pipe is not prone to frost damage during operation in winter, the enthalpy difference of treatment of the air conditioner water coil pipe is small during operation in summer, and the cooling and heat exchange efficiency is improved. Fresh air can be preheated in winter, the anti-freezing effect is achieved, the fresh air can be precooled in summer, and the heat exchange efficiency of the coil pipe is improved.

Description

Technical Field

[0001] The utility model relates to a fresh air unit, in particular to a multifunctional antifreeze fresh air unit. Background Art

[0002] At present, the fresh air unit of the hospital's operating room purification air conditioner draws fresh air from the outside and enters the fresh air unit directly through the air duct. After the fresh air enters the fresh air unit, it is filtered and pressurized by the fan, and then passes through the air conditioning water coil for cooling and dehumidification or heating and heating. The treated fresh air is sent to the circulation unit in each operating room.

[0003] The disadvantage of this type of fresh air unit is that, in cold regions, to prevent the air conditioning water coils inside the fresh air unit from freezing, electric heating is usually used to heat the outdoor fresh air to a certain temperature, thereby protecting the air conditioning water flowing in the coils from freezing. However, the use of electric heating is not recommended for energy conservation.

[0004] In the summer, when outdoor air temperatures are high, the air conditioning coils in the fresh air unit must cool the hot outdoor air down to around 12°C. This is commonly known as the fresh air unit's large enthalpy difference process. The greater the enthalpy difference between the fresh air unit's front and back treatments, the lower its efficiency. To cool the air down, more cooling capacity is required, and lower air conditioning water temperatures are also detrimental to energy conservation. Summary of the Invention

[0005] The purpose of the utility model is to provide a multifunctional antifreeze fresh air unit which can preheat the fresh air in winter to play an antifreeze role, and can precool the fresh air in summer to improve the coil heat exchange efficiency.

[0006] In order to achieve the above object, the technical solution of the utility model is: a multifunctional antifreeze fresh air unit, comprising a fresh air unit, an air inlet component and an air outlet duct, wherein the air inlet of the fresh air unit is provided with an air inlet component and the air outlet is provided with an air outlet duct, and the innovation lies in: further comprising a fresh air preheating antifreeze bypass component,

[0007] The interior of the fresh air unit is provided with an air mixing section near the air inlet end and a flow equalizing bypass section near the air outlet end.

[0008] The fresh air preheating and antifreeze bypass assembly includes a bypass air duct and a second electric regulating air valve. The two ends of the bypass air duct are respectively connected to the air mixing section and the flow-sharing bypass section, and the second electric regulating air valve is provided on the bypass air duct.

[0009] When the fresh air unit is running in winter, the outdoor fresh air enters the mixed air section of the fresh air unit through the air inlet assembly. At the same time, the heated air inside the fresh air unit flows into the equal flow bypass section and enters the mixed air section under the action of the bypass air duct. After mixing with the outdoor fresh air, the fresh air is preheated before entering the interior of the fresh air unit to achieve anti-freezing of the coil inside the fresh air unit.

[0010] When the fresh air unit is operating in summer, the outdoor fresh air enters the mixed air section of the fresh air unit through the air inlet component. At the same time, the cooled air inside the fresh air unit flows into the equal flow bypass section, and enters the mixed air section under the action of the bypass air duct. After mixing with the outdoor fresh air, the fresh air is pre-cooled before entering the interior of the fresh air unit, which is used to improve the heat exchange efficiency of the coil inside the fresh air unit.

[0011] In the above technical solution, the air inlet assembly includes an air inlet duct, a first electric regulating air valve and a check valve. The air inlet duct is connected to the air inlet of the fresh air unit, and the air inlet duct is provided with a first electric regulating air valve and a check valve on its body.

[0012] In the above technical solution, fresh air louvers are provided on the outside of the air inlet assembly.

[0013] In the above technical solution, the flange at the air inlet of the fresh air unit is softly connected to the flange of the air inlet duct through a canvas hose, and the flange at the air outlet is softly connected to the flange of the air outlet duct through a canvas hose, and the air outlet duct is externally connected to other circulation units.

[0014] In the above technical solution, the interior of the fresh air unit is located between the mixed air section and the equal flow bypass section, and a primary and secondary efficiency filter section, an EC fan section, and a coil section for installing a hot coil and a cold coil are sequentially provided. A sub-high efficiency filter outlet section is also provided on the outside of the equal flow bypass section and adjacent to the air outlet of the fresh air unit.

[0015] In the above technical solution, the bypass air duct is of U-shaped structure as a whole, and both ends of the bypass air duct are softly connected to the air mixing section and the flow-equalizing bypass section through canvas hoses respectively.

[0016] The positive effect of the utility model is that after adopting the multifunctional antifreeze fresh air unit of the utility model, since the utility model also includes a fresh air preheating antifreeze bypass component,

[0017] The interior of the fresh air unit is provided with an air mixing section near the air inlet end and a flow equalizing bypass section near the air outlet end.

[0018] The fresh air preheating and antifreeze bypass assembly includes a bypass air duct and a second electric regulating air valve. The two ends of the bypass air duct are respectively connected to the air mixing section and the flow-sharing bypass section, and the second electric regulating air valve is provided on the bypass air duct.

[0019] When the fresh air unit is running in winter, the outdoor fresh air enters the mixed air section of the fresh air unit through the air inlet assembly. At the same time, the heated air inside the fresh air unit flows into the equal flow bypass section and enters the mixed air section under the action of the bypass air duct. After mixing with the outdoor fresh air, the fresh air is preheated before entering the interior of the fresh air unit to achieve anti-freezing of the coil inside the fresh air unit.

[0020] When the fresh air unit is running in summer, the outdoor fresh air enters the mixed air section of the fresh air unit through the air inlet assembly. At the same time, the cooled air inside the fresh air unit flows into the flow-balancing bypass section and enters the mixed air section under the action of the bypass duct. After mixing with the outdoor fresh air, the fresh air is pre-cooled before entering the interior of the fresh air unit, which is used to improve the heat exchange efficiency of the coil inside the fresh air unit.

[0021] The utility model adds a fresh air preheating and anti-freezing bypass component. In winter, it uses its own equal flow bypass section to feed back a part of the heated fresh air to the mixed air section of the fresh air unit, so as to heat the extracted outdoor fresh air, and prevent the overcooled fresh air from directly entering the fresh air unit and causing the air-conditioning water coil to be frozen, thereby effectively playing an anti-freezing role. In summer, it uses its own equal flow bypass section to feed back a part of the cooled fresh air to the mixed air section of the fresh air unit, so as to pre-cool the extracted outdoor fresh air, thereby reducing the enthalpy difference treated by the air-conditioning water coil and increasing the cooling and heat exchange efficiency, which is more conducive to improving the stability of the air-conditioning system of the operating department and making the temperature and humidity in the operating room more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of a specific implementation method of the utility model. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and given embodiments, but the present invention is not limited thereto.

[0024] like Figure 1 As shown, a multifunctional antifreeze fresh air unit includes a fresh air unit 1, an air inlet component 2 and an air outlet duct 3. The air inlet of the fresh air unit 1 is provided with an air inlet component 2, the air outlet is provided with an air outlet duct 3, and also includes a fresh air preheating antifreeze bypass component 4.

[0025] The interior of the fresh air unit 1 is provided with an air mixing section 11 near the air inlet end and a flow equalizing bypass section 15 near the air outlet end.

[0026] The fresh air preheating and antifreeze bypass assembly 4 includes a bypass air duct 41 and a second electric regulating air valve 42. The two ends of the bypass air duct 41 are respectively connected to the air mixing section 11 and the flow-sharing bypass section 15. The second electric regulating air valve 42 is provided on the bypass air duct 41.

[0027] When the fresh air unit 1 is running in winter, the outdoor fresh air enters the air mixing section 11 of the fresh air unit 1 through the air inlet component 2. At the same time, the heated air inside the fresh air unit 1 flows into the flow-balancing bypass section 15 and enters the air mixing section 11 under the action of the bypass air duct 41. After mixing with the outdoor fresh air, the fresh air is preheated before entering the interior of the fresh air unit 1 to achieve anti-freezing of the coil inside the fresh air unit 1.

[0028] When the fresh air unit 1 is operating in summer, the outdoor fresh air enters the mixed air section 11 of the fresh air unit 1 through the air inlet component 2. At the same time, the cooled air inside the fresh air unit 1 flows into the flow-balancing bypass section 15, and enters the mixed air section 11 under the action of the bypass air duct 41. After mixing with the outdoor fresh air, the fresh air is pre-cooled and then enters the interior of the fresh air unit 1, so as to improve the heat exchange efficiency of the coil inside the fresh air unit 1.

[0029] like Figure 1 As shown, in order to achieve linkage between the air intake assembly and the fresh air unit, the air intake assembly 2 includes an air intake duct 21, a first electric air regulating valve 22, and a check valve 23. The air intake duct 21 is connected to the air inlet of the fresh air unit 1, and the first electric air regulating valve 22 and the check valve 23 are installed on the body of the air intake duct 21. When the fresh air unit 1 is turned on, the first electric air regulating valve 22 opens. Conversely, when the fresh air unit 1 is turned off, the first electric air regulating valve 22 closes. The addition of a check valve is intended to ensure that the fresh air in the air intake duct can only flow in one direction.

[0030] like Figure 1 As shown, in order to prevent debris from entering the air inlet duct, fresh air louvers 5 are provided on the outside of the air inlet assembly 2, which can effectively prevent objects such as leaves and plastic bags from entering the unit and affecting normal operation.

[0031] like Figure 1 As shown, in order to achieve soft connection between the air inlet duct and the air outlet duct and the air inlet and air outlet of the unit, and prevent the air duct from being affected by external forces and affecting the normal operation of the fresh air unit, the flange at the air inlet of the fresh air unit 1 is softly connected to the flange of the air inlet duct 21 through a canvas hose, and the flange at the air outlet is softly connected to the flange of the air outlet duct 3 through a canvas hose, and the air outlet duct 3 is externally connected to other circulation units.

[0032] like Figure 1 As shown, in order to achieve filtration, fan pressurization, cooling and dehumidification or heating of the air-conditioning water coil and secondary filtration of the fresh air in the fresh air unit, the interior of the fresh air unit 1 of the present invention is provided with a primary and secondary efficiency filter section 12, an EC fan section 13 and a coil section 14 for installing a hot coil and a cold coil in sequence between the air mixing section 11 and the flow-sharing bypass section 15. A sub-high-efficiency filter outlet section 16 is provided on the outside of the flow-sharing bypass section 15 and adjacent to the air outlet of the fresh air unit 1.

[0033] like Figure 1 As shown, in order to further improve the rationality of the structure, the bypass air duct 41 is generally U-shaped, and both ends of the bypass air duct 41 are softly connected to the air mixing section 11 and the flow-balancing bypass section 15 through canvas hoses.

[0034] The working process of the present invention is as follows: when the fresh air unit 1 is operating in winter, the first electric regulating air valve 22 is opened and the second electric regulating air valve 42 is closed. In the early operation stage of the fresh air unit 1, the EC fan is operated at a reduced frequency. When the air behind the coil section is heated to 5-8°C, the second electric regulating air valve 42 is opened, and the outdoor fresh air enters the mixed air section 11 of the fresh air unit 1 through the air inlet component 2. At the same time, the heated air inside the fresh air unit 1 flows into the equal flow bypass section 15 and enters the mixed air section 11 under the action of the bypass air duct 41. After being mixed with the outdoor fresh air, the fresh air is preheated and then enters the interior of the fresh air unit 1 to achieve anti-freezing of the coil in the fresh air unit 1. At the same time, in order to make up for the fresh air volume supplied to each circulation unit due to the reduction in bypass air volume, the operating frequency of the EC fan is increased and the air volume is increased when the second electric regulating air valve 42 is opened.

[0035] When the fresh air unit 1 is running in summer, the first electric regulating air valve 22 is opened and the second electric regulating air valve 42 is closed. In the early operation stage of the fresh air unit 1, the EC fan is operated at a reduced frequency. When the air behind the coil section is cooled to 12-15°C, the second electric regulating air valve 42 is opened, and the outdoor fresh air enters the mixed air section 11 of the fresh air unit 1 through the air inlet component 2. At the same time, the cooled air inside the fresh air unit 1 flows into the flow-sharing bypass section 15 and is discharged by the bypass duct 41. The fresh air enters the mixed air section 11 and is mixed with the outdoor fresh air. The temperature of the fresh air is reduced and the enthalpy value is also reduced accordingly. In this way, the amount of enthalpy difference processing of the coil in the fresh air unit is small. The cooled fresh air then enters the fresh air unit 1, which improves the heat exchange efficiency of the coil. At the same time, in order to make up for the reduction in the amount of fresh air sent to each circulation unit due to the bypass air volume, the operating frequency of the EC fan is increased when the second electric regulating air valve 42 is opened, and the air volume is increased to improve the heat exchange efficiency of the coil in the fresh air unit 1.

[0036] The utility model adds a fresh air preheating and anti-freezing bypass component. In winter, it uses its own equal flow bypass section to feed back a part of the heated fresh air to the mixed air section of the fresh air unit, so as to heat the extracted outdoor fresh air, and prevent the overcooled fresh air from directly entering the fresh air unit and causing the air-conditioning water coil to be frozen, thereby effectively playing an anti-freezing role. In summer, it uses its own equal flow bypass section to feed back a part of the cooled fresh air to the mixed air section of the fresh air unit, so as to pre-cool the extracted outdoor fresh air, thereby reducing the enthalpy difference treated by the air-conditioning water coil and increasing the cooling and heat exchange efficiency, which is more conducive to improving the stability of the air-conditioning system of the operating department and making the temperature and humidity in the operating room more stable.

[0037] That is to say, the treated fresh air is bypassed through the equalizing bypass section of the fresh air unit to preheat and precool the outdoor fresh air, ensuring that the air-conditioning water coil of the fresh air unit 1 is not easily frozen when it is operated in winter. When it is operated in summer, the enthalpy difference treated by the air-conditioning water coil is small, and the cooling and heat exchange efficiency is increased, which is more conducive to improving the stability of the air-conditioning system of the operating department and making the temperature and humidity in the operating room more stable.

[0038] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A multifunctional antifreeze fresh air unit, comprising a fresh air unit (1), an air inlet assembly (2) and an air outlet duct (3), wherein the air inlet of the fresh air unit (1) is provided with the air inlet assembly (2) and the air outlet is provided with the air outlet duct (3), and characterized in that: It also includes a fresh air preheating and antifreeze bypass component (4), The interior of the fresh air unit (1) is provided with an air mixing section (11) near the air inlet end, and a flow equalization bypass section (15) near the air outlet end. The fresh air preheating and antifreeze bypass assembly (4) comprises a bypass air duct (41) and a second electric regulating air valve (42), wherein both ends of the bypass air duct (41) are respectively connected to the air mixing section (11) and the flow-sharing bypass section (15), and the second electric regulating air valve (42) is provided on the bypass air duct (41). When the fresh air unit (1) is in operation in winter, the outdoor fresh air enters the air mixing section (11) of the fresh air unit (1) through the air inlet assembly (2). At the same time, the heated air inside the fresh air unit (1) flows into the flow-averaging bypass section (15) and enters the air mixing section (11) under the action of the bypass air duct (41). After being mixed with the outdoor fresh air and preheated, the fresh air enters the interior of the fresh air unit (1), thereby preventing the coil inside the fresh air unit (1) from freezing. When the fresh air unit (1) is in operation in summer, outdoor fresh air enters the air mixing section (11) of the fresh air unit (1) through the air inlet assembly (2). At the same time, the air cooled inside the fresh air unit (1) flows into the flow-averaging bypass section (15) and enters the air mixing section (11) under the action of the bypass air duct (41). After being mixed with the outdoor fresh air and pre-cooled, the fresh air enters the interior of the fresh air unit (1), thereby improving the heat exchange efficiency of the coil inside the fresh air unit (1).

2. The multifunctional antifreeze fresh air unit according to claim 1 is characterized in that: The air inlet assembly (2) comprises an air inlet duct (21), a first electric air regulating valve (22) and a check valve (23); the air inlet duct (21) is connected to the air inlet of the fresh air unit (1), and the first electric air regulating valve (22) and the check valve (23) are provided on the body of the air inlet duct (21).

3. The multifunctional antifreeze fresh air unit according to claim 1 is characterized in that: Fresh air louvers (5) are provided on the outer side of the air inlet assembly (2).

4. The multifunctional antifreeze fresh air unit according to claim 2 is characterized in that: The flange at the air inlet of the fresh air unit (1) is softly connected to the flange of the air inlet duct (21) through a canvas hose, and the flange at the air outlet is softly connected to the flange of the air outlet duct (3) through a canvas hose, and the air outlet duct (3) is externally connected to other circulation units.

5. The multifunctional antifreeze fresh air unit according to claim 1 is characterized in that: The interior of the fresh air unit (1) and located between the air mixing section (11) and the flow-sharing bypass section (15) are provided with a primary and secondary efficiency filter section (12), an EC fan section (13), and a coil section (14) for installing a hot coil and a cold coil. A sub-high efficiency filter outlet section (16) is provided outside the flow-sharing bypass section (15) and adjacent to the air outlet of the fresh air unit (1).

6. The multifunctional antifreeze fresh air unit according to claim 1 is characterized in that: The bypass air duct (41) is of a U-shaped structure as a whole, and both ends of the bypass air duct (41) are softly connected to the air mixing section (11) and the flow-averaging bypass section (15) through canvas hoses.

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