Fan box suitable for conversion of epidemic prevention working conditions

Abstract

The utility model relates to the field of fan boxes, in particular to a fan box suitable for conversion of epidemic prevention working conditions, which comprises a fan box, a frequency conversion fan is mounted in the fan box, the fan box is provided with a fan box connection port, an electrically operated valve MD 1 and an electrically operated valve MD 2 are respectively mounted in the fan box, a partition plate is arranged between the electrically operated valve MD 1 and the electrically operated valve MD 2, and the fan box connection port is connected with the electrically operated valve MD 1 and the electrically operated valve MD 2. The partition plate is fixedly connected with the fan box, and an electric valve MD III is mounted on the partition plate; and a low-efficiency filter and a medium-efficiency filter are respectively mounted at the top in the fan box. When the ventilation system is used, under the normal working condition, the first electric valve MD and the second electric valve MD are opened, the third electric valve MD is closed, the efficient filter bypass and the frequency conversion fan operate at a low speed, and the design requirement of the ventilation system at ordinary times is met. Under the epidemic situation working condition, the first electric valve MD and the second electric valve MD are closed, the third electric valve MD is opened, and indoor polluted air is discharged at high altitude after being treated by the high-efficiency filter. At ordinary times, the fan does not bear the resistance of the high-efficiency filter, and energy is saved.

Description

Technical Field

[0001] The utility model relates to the field of fan boxes, and in particular to a fan box suitable for conversion between normal and epidemic working conditions. Background Art

[0002] The "Technical Guidelines for the Construction of Convertible Wards in Comprehensive Hospitals for Peacetime and Epidemic Conditions (Trial)" stipulates that the number of fresh air exchanges in negative pressure isolation wards used in epidemic conditions shall not be less than 12 times / h. The number of fresh air exchanges in ordinary wards used during normal times is generally 3 (non-respiratory wards) or 6 times / h (respiratory wards). At the same time, the exhaust system of the ward used during epidemic conditions generally needs to be equipped with a high-efficiency filter, and the resistance of the high-efficiency filter is relatively large. The exhaust system under epidemic conditions has the characteristics of large air volume and large system resistance. The fans used in normal conditions cannot meet the requirements of epidemic conditions. When designing hospital buildings that combine peacetime and epidemic conditions and convert between peacetime and epidemic conditions, they are generally set according to the most unfavorable conditions, namely epidemic conditions. This undoubtedly increases the operating energy consumption of the fans during normal times, which is contrary to the current energy-saving and emission reduction policies advocated. Therefore, those skilled in the art provide a fan box suitable for conversion between peacetime and epidemic conditions to solve the problems raised in the above background technology. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a fan box suitable for switching between normal and epidemic working conditions, including a fan box, a variable frequency fan installed in the fan box, a fan box connection port, an electric valve MD1 and an electric valve MD2 installed in the fan box, a partition is provided between the electric valve MD1 and the electric valve MD2, the partition is fixedly connected to the fan box, and the partition is installed with the electric valve MD3;

[0004] A coarse-effect filter and a medium-effect filter are respectively installed on the top of the fan box.

[0005] Preferably, an air inlet is provided on the top of the fan box, and the coarse-effect filter is located between the medium-effect filter and the air inlet.

[0006] Preferably: a high efficiency filter is installed at the bottom of the electric valve MD3.

[0007] Preferably, the high efficiency filter is fixedly connected to the fan box.

[0008] The technical effects and advantages of this utility model are:

[0009] During normal operating conditions, electric valves MD1 and MD2 are open, MD3 is closed, the HEPA filter is bypassed, and the variable frequency fan operates at low speed, meeting normal ventilation system design requirements. During epidemic conditions, electric valves MD1 and MD2 are closed, MD3 is opened, and indoor polluted air is treated by the HEPA filter before being discharged into the atmosphere. During normal operating conditions, the fan does not bear the resistance of the HEPA filter, which is more energy-efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural diagram provided by this application;

[0011] In the figure: 1. Fan box; 2. Variable frequency fan; 3. Fan box connection port; 4. High efficiency filter;

[0012] 5. Electric valve MD 1; 6. Electric valve MD 2; 7. Electric valve MD 3; 8. Coarse filter;

[0013] 9. Medium efficiency filter. DETAILED DESCRIPTION

[0014] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.

[0015] See also Figure 1 In this embodiment, a fan box suitable for switching between normal and epidemic conditions is provided, including a fan box 1, a variable frequency fan 2 is installed in the fan box 1, the fan box 1 is provided with a fan box connection port 3, an electric valve MD-5 and an electric valve MD-6 are respectively installed in the fan box 1, a partition is provided between the electric valve MD-5 and the electric valve MD-6, the partition is fixedly connected to the fan box 1, and the partition is installed with the electric valve MD-3 7;

[0016] A coarse-effect filter 8 and a medium-effect filter 9 are respectively installed on the top of the fan box 1. An air inlet is provided on the top of the fan box 1. The coarse-effect filter 8 is located between the medium-effect filter 9 and the air inlet. A high-efficiency filter 4 is installed on the bottom of the MD three 7, and the high-efficiency filter 4 is fixedly connected to the fan box 1.

[0017] The working principle of this utility model is:

[0018] This patented method: Under normal operating conditions, electric valves MD1 and MD2 are open, electric valve MD3 is closed, the HEPA filter is bypassed, and the variable frequency fan runs at a low speed, meeting the normal ventilation system design requirements. During epidemic conditions, electric valves MD1 and MD2 are closed, and electric valve MD3 is opened, and indoor polluted air is processed by the HEPA filter and discharged into the air. Under normal operating conditions, the fan does not bear the resistance of the HEPA filter, which is more energy-efficient.

[0019] The fan in the fan box 1 is a variable frequency fan 2, and the wind speed of the fan can be adjusted according to whether the air passes through the high efficiency filter 4.

[0020] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making any creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in this utility model shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A fan box suitable for switching between normal and epidemic conditions, comprising a fan box (1), characterized in that: A variable frequency fan (2) is installed in the fan box (1), and the fan box (1) is provided with a fan box connection port (3). An electric valve MD1 (5) and an electric valve MD2 (6) are respectively installed in the fan box (1). A partition is provided between the electric valve MD1 (5) and the electric valve MD2 (6), and the partition is fixedly connected to the fan box (1). The partition is provided with an electric valve MD3 (7); A coarse filter (8) and a medium filter (9) are respectively installed on the top of the fan box (1).

2. A fan box suitable for switching between normal and epidemic conditions according to claim 1, characterized in that: An air inlet is provided on the top of the fan box (1), and a coarse-effect filter (8) is located between the medium-effect filter (9) and the air inlet.

3. The fan box suitable for switching between normal and epidemic conditions according to claim 1 is characterized in that: A high efficiency filter (4) is installed at the bottom of the electric valve MD3 (7).

4. A fan box suitable for switching between normal and epidemic conditions according to claim 3, characterized in that: The high efficiency filter (4) is fixedly connected to the fan box (1).

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