Positive pressure isolation head cover

Abstract

The application discloses a positive pressure isolation head cover, which comprises a head cover, a supporting ring, an air conveying pipe and a fan, a transparent window is arranged on the front part of the head cover, the supporting ring is arranged inside the head cover to support the head cover, so that the head cover can be fixed on the head of a user through the supporting ring, the inside of the supporting ring is hollow, a plurality of air outlet holes are arranged on the supporting ring in the circumferential direction and are communicated with the inside of the supporting ring, an air inlet port is arranged on the rear part of the supporting ring and is communicated with the inside of the supporting ring, the air inlet port is connected with one side pipe end of the air conveying pipe through a joint, the other side pipe end of the air conveying pipe is connected with the air outlet of the fan, a filter tank is arranged at the air inlet of the fan and is used for filtering air, and an electric plate is arranged outside the fan and is used for providing electric power for the fan. The head cover has the advantages of simple structure, relatively low price and low use cost.

Description

Technical Field

[0001] This invention relates to the field of personal protective equipment technology, specifically to a positive pressure isolation hood. Background Technology

[0002] When working in areas where dust, fumes, gases, pathogens, or other contaminants are known to be present or may be potentially hazardous or harmful to health, operators must wear a positive pressure breathing apparatus (PPB). During use, the PPB maintains a slightly higher pressure throughout the respiratory system than the ambient air pressure, preventing toxic or harmful gases or pathogens from entering the user's respiratory system and thus avoiding infection for medical personnel. However, PPBs have disadvantages such as complex structure, high price, and high operating costs. Summary of the Invention

[0003] The purpose of this invention is to provide a positive pressure isolation hood that is simple in structure, relatively inexpensive, and has low operating costs.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a positive pressure isolation hood, comprising a hood, a support ring, an air delivery pipe, and a fan. A transparent viewing window is provided at the front of the hood. The support ring is disposed inside the hood to support it, allowing the hood to be fixed to the user's head. The support ring is hollow inside, and several air outlets communicating with the inside of the support ring are arranged circumferentially on the support ring. An air inlet port communicating with the inside of the support ring is provided at the rear of the support ring. The air inlet port is connected to one end of the air delivery pipe via a connector, and the other end of the air delivery pipe is connected to the air outlet of the fan. A filter canister for filtering air is provided at the air inlet of the fan, and an electrical board for providing power to the fan is provided outside the fan.

[0005] Furthermore, in the aforementioned positive pressure isolation hood, the specific structure of the connector includes: a connector body, in which an air passage runs vertically through the connector body; an annular groove for inserting the end of an air delivery pipe is arranged around the air passage at the lower end of the connector body; a connecting pipe is arranged at the upper end of the connector body, the lower end of the connecting pipe is inserted downward and fixed in the air passage of the connector body; a positioning skirt is arranged at the upper end of the connecting pipe; a positioning head protruding from the end face of the connecting pipe opening and capable of engaging with the air inlet port of the support ring is arranged on the upper end face of the positioning skirt; two guide holes are arranged on the positioning head, penetrating the positioning head and the positioning skirt, and the two guide holes are distributed... On both sides of the pipe inlet, there are downward-facing blocks at the pipe inlet. At the bottom of each block, there is a guide strip vertically installed. The two guide strips of the block are inserted into two guide holes and extend downward from the corresponding guide holes to the outside of the pipe. The block, the two guide strips, and the positioning head together form the air outlet. External threads are provided on the outer wall of the two guide strips. A rotating sleeve is provided between the positioning head and the connector body, which is sleeved on the outside of the two guide strips and threaded to the two guide strips. When the rotating sleeve rotates, it can drive the guide strips and the block to move up or down relative to the positioning head along the guide holes, thereby adjusting the size of the air outlet.

[0006] Furthermore, in the aforementioned positive pressure isolation hood, a shoulder shield is connected to the lower part of the hood.

[0007] Through the implementation of the above technical solution, the beneficial effects of the present invention are: simple structure, relatively low price and low cost of use. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of a positive pressure isolation hood according to the present invention.

[0009] Figure 2 for Figure 1 A schematic diagram of the structure viewed from the left.

[0010] Figure 3 for Figure 1 The diagram shows the structure of the support ring.

[0011] Figure 4 for Figure 3 A structural diagram viewed from below.

[0012] Figure 5 for Figure 1 The diagram shows the structure of the connector.

[0013] Figure 6 for Figure 5 The diagram shows the structure of the stop block.

[0014] Figure 7for Figure 5 The diagram shows the structure of the connector body.

[0015] Figure 8 for Figure 1 The diagram shows the structure of the fan.

[0016] Figure 9 This is a schematic diagram illustrating the usage state of a positive pressure isolation headgear as described in this invention when installed on a human body. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0018] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, a positive pressure isolation headgear includes a headgear 1, a support ring 2, an air delivery pipe 3, and a fan 4. The headgear 1 has a transparent viewing window 5 at the front. The support ring 2 is located inside the headgear 1 to support the headgear 1 so that the headgear 1 can be fixed to the user's head 6. The support ring 2 is hollow inside. Several air outlets 7 connected to the inside of the support ring 2 are arranged circumferentially on the support ring 2. An air inlet port 8 connected to the inside of the support ring 2 is located at the rear of the support ring 2. The air inlet port 8 is connected to one end of the air delivery pipe 3 through a connector 9. The other end of the air delivery pipe 3 is connected to the air outlet of the fan 4. A filter canister 10 for filtering air is provided at the air inlet of the fan 4. An electric plate 11 for providing power to the fan 4 is provided outside the fan 4.

[0019] In this embodiment, the specific structure of the connector 9 includes: a connector body 91, in which an air passage is provided vertically through the connector body 91; an annular groove for inserting the end of the air delivery pipe 3 is provided around the air passage at the lower end of the connector body 91; a connecting pipe 92 is provided at the upper end of the connector body 91, the lower end of the connecting pipe 92 is inserted downward and fixed in the air passage of the connector body 91; a positioning skirt 93 is provided at the upper end of the connecting pipe 92; a positioning head 94 protruding from the end face of the connecting pipe opening 921 and capable of engaging with the air inlet port 8 of the support ring is provided on the upper end face of the positioning skirt 93 along the edge of the connecting pipe opening 921; two guide holes 95 penetrating the positioning head 94 and the positioning skirt 93 are provided on the positioning head 94, the two guide holes 95 being distributed on both sides of the connecting pipe opening 921; and a downward-facing connecting... The stop block 96 of the pipe opening 921 has a guide strip 97 vertically arranged at both ends of its bottom. The two guide strips of the stop block 96 are respectively inserted into two guide holes and extend downward from the corresponding guide holes to the outside of the pipe. The stop block 96, the two guide strips 97, and the positioning head 94 together form an air outlet. External threads 98 are provided on the outer walls of the two guide strips 97. A rotating sleeve 99 is provided between the positioning head 94 and the connector body 91, which is sleeved on the outside of the two guide strips 97 and threaded to the two guide strips 97. When the rotating sleeve 99 rotates, it can drive the guide strips 97 and the stop block 96 to move up or down relative to the positioning head 94 along the guide hole 95, thereby adjusting the size of the air outlet. The above connector structure is simple and easy to install and maintain. In this embodiment, a shoulder cover 12 is connected to the lower part of the head cover 1.

[0020] During installation, the user 6 simply places the headgear 1 over their head until the support ring 2 inside the headgear 1 is installed on their head. During use, the fan 4 is turned on, and the fan 4 draws in outside air through the air inlet. As the outside air passes through the air inlet of the fan 4, it is filtered into clean gas by the filter canister 10. The clean gas is then sequentially delivered into the headgear 1 through the air delivery pipe 3, connector 9, air inlet 8 of support ring 2, internal space of support ring 2, and air outlet 7 of support ring 2. This provides breathing for the user and ensures that the gas pressure inside the headgear 1 is always slightly higher than the external ambient gas pressure, preventing toxic or harmful gases or germs from the external environment from entering the user's respiratory system and thus effectively avoiding infection of medical personnel.

[0021] The advantages of this invention are: simple structure, relatively low price and low cost of use.

[0022] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any modifications or equivalent changes made based on the technical essence of the present invention shall still fall within the scope of protection claimed by the present invention.

Claims

1. A positive pressure isolator hood, characterized by: The device includes a headgear, a support ring, an air delivery pipe, and a fan. The headgear has a transparent window at the front. The support ring is located inside the headgear to support it and secure it to the user's head. The support ring is hollow and has several air outlets connected to its interior along its circumference. The support ring has an air inlet at its rear, which is connected to its interior. The air inlet is connected to one end of the air delivery pipe via a connector, and the other end of the air delivery pipe is connected to the air outlet of the fan. A filter canister is located at the air inlet of the fan to filter the air. An electrical board is located outside the fan to provide power to it. The connector's specific structure includes: a connector body, within which an air passage runs vertically through the connector body; an annular groove around the lower end of the connector body for inserting the end of an air delivery pipe; a connecting pipe at the upper end of the connector body, with its lower end inserted downwards and fixed within the air passage of the connector body; a positioning skirt at the upper end of the connecting pipe; and a positioning head protruding from the end face of the connecting pipe opening and capable of engaging with the air inlet port of the support ring on the upper surface of the positioning skirt; two guide holes penetrating the positioning head and the positioning skirt, distributed on both sides of the connecting pipe opening. A stop block facing downwards is provided at the pipe opening. A guide strip is vertically provided at both ends of the bottom of the stop block. The two guide strips of the stop block are respectively inserted into two guide holes and extend downwards from the corresponding guide holes to the outside of the pipe. The stop block, the two guide strips, and the positioning head together form an air outlet. External threads are provided on the outer walls of the two guide strips. A rotating sleeve is provided between the positioning head and the connector body, which is sleeved on the outside of the two guide strips and threaded to the two guide strips. When the rotating sleeve rotates, it can drive the guide strips and the stop block to move up or down relative to the positioning head along the guide holes, thereby adjusting the size of the air outlet.

2. A positive pressure isolator hood according to claim 1, wherein: Shoulder guards are attached to the lower part of the hood.

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