Volume tracing box

Abstract

The invention discloses a plethysmography box which comprises a box body and an air circulation system, the box body is used for containing a person to be examined in an airtight mode, and the air circulation system is configured to conduct internal circulation purification through gas in the box body. According to the volume tracing box, the air circulation system is arranged in the body tracing box, internal circulation and purification treatment are carried out on gas in the body tracing box, gas temperature rise and humidity rise in the box caused by a human body are reduced, it is ensured that the gas environment in the box is stable, and therefore the detection precision of the body tracing box is improved.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a plethysmograph box. Background Art

[0002] At the end of the 19th century, some scholars proposed to measure the functional residual capacity by measuring the volume change of the human body caused by the expansion of the chest cavity during breathing. It was not until 1956 that the practical volume volumography technology based on Boyle's law was developed, that is, under sealed constant temperature conditions, a certain amount of gas will be compressed or expanded, and its volume will be reduced or increased, while the change in air pressure follows the product of pressure and volume at any time to remain constant. The sealed container required for direct or indirect measurement of human body volume changes is called a volume volumography box, or volume volumography box for short. There are three types of volume volumography boxes currently in use: pressure volumography box, volume volumography box, and flow volumography box. The volume volumography box basically consists of a cabin similar to a telephone booth, which can be closed in an airtight manner, and the person to be examined is placed in it.

[0003] During clinical testing, subjects need to enter a closed body scan box to measure relevant lung function parameters. Since the body scan box is a relatively sealed environment, the heat dissipation of the human body and the gas produced by exhalation will quickly cause the temperature and humidity in the body scan box to rise rapidly, thereby causing the box pressure to rise rapidly. Although the pressure will be reduced when the box pressure exceeds the threshold, as the test time increases, the subjects will feel short of breath due to lack of oxygen, and feel uncomfortable due to the increase in temperature and humidity, thus affecting the test results. Summary of the invention

[0004] The main technical problem solved by the present invention is to provide a plethysmograph box to solve the problems of temperature, humidity, oxygen content, etc. in the plethysmograph box, and to add an air purification circulation system, so as to achieve the purpose of single circulation flow of air in the plethysmograph box through a single fan, thereby avoiding all or some of the above-mentioned defects.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a plethysmograph box, which includes a box body and an air circulation system, wherein the box body is used to accommodate a person to be examined in an airtight manner, and the air circulation system is configured to use the gas in the box body for internal circulation purification.

[0006] Wherein, the air circulation system is installed outside the box.

[0007] The air circulation system includes an air inlet pipe, an air pump, a condenser, an air outlet pipe and a controller, and the gas in the box circulates through the air inlet pipe, the air pump, the condenser and the air outlet pipe in sequence;

[0008] One end of the air inlet pipe is connected to the box body, and the other end is connected to the air pump;

[0009] One end of the air outlet pipe is connected to the box body, and the other end is connected to the condenser;

[0010] The condenser is arranged between the air pump and the air outlet pipe;

[0011] The controller is used to control the start or stop of the air circulation system.

[0012] Wherein, the air circulation system also includes a pressure control component.

[0013] Wherein, the pressure control component includes a first air container and a second air container, the first air container is arranged between the air inlet pipe and the air pump, and the second air container is arranged between the condenser and the air outlet pipe.

[0014] Wherein, the air circulation system also includes a filter component.

[0015] Wherein, the filtering device comprises a filter screen, and the filter screen is arranged between the air inlet pipe and the first air container.

[0016] Wherein, the filtering device further comprises a filter, and the filter is arranged between the air outlet pipe and the second air container.

[0017] Wherein, the air circulation system further includes a denoising component, and the denoising component is arranged between the filter screen and the first air container.

[0018] Wherein, the denoising component includes a silencer.

[0019] Compared with the prior art, the beneficial effects achieved by the plethysmograph box of the present invention are as follows: by configuring an air circulation system in the plethysmograph box, the gas in the plethysmograph box is internally circulated and purified, thereby reducing the temperature rise and humidity increase of the gas in the box caused by the human body, ensuring the stability of the gas environment in the box, and thus improving the detection accuracy of the plethysmograph box. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the plethysmography box of the present invention;

[0022] Figure 2 It is a top view of the plethysmograph box of the present invention. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the embodiment of the present invention, all directional indications (such as up, down, left, right, front, back ...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. The terms "first", "second", etc. in this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0025] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0026] See also Figure 1 to Figure 2 , Figure 1 1 is a schematic diagram of the three-dimensional structure of the plethysmography box of the present invention, Figure 2 The plethysmograph box of the present invention is a top view. The plethysmograph box comprises a box body 1 and an air circulation system 2. The plethysmograph box of the present invention has a large box body and a wide range of applications, and can be applied to children over 8 years old, adults and the elderly, and is mainly applied to adults.

[0027] As described in the above background technology, the temperature and humidity in the current body scanning box need to be processed accordingly during the test process in order to maintain the stability of the environment in the body scanning box. At present, most commercial body scanning boxes use algorithms to deal with the problem of increased box pressure caused by temperature rise. The differences in algorithm processing between different manufacturers will produce certain differences in test results. Therefore, maintaining the constant temperature and humidity in the box also has a certain impact on the stability of the test results.

[0028] Some body scanning boxes are also equipped with external air circulation devices, which extract the air in the body scanning box and introduce it into the external environment, and filter and circulate the air in the body scanning box. However, the humidity and temperature of the introduced external gas are quite different from those of the gas in the box, and complex mechanisms are required for corresponding treatment, such as filtering, dehumidification, heating, pressurization, etc. At the same time, it is also necessary to ensure that the flow of gas extracted and entering the box is consistent, and the structure is complex and the cost is high. For example, there are currently body scanning boxes designed for infants and young children. The box volume of infant body scanning boxes is small, and infants and young children are more sensitive to the environment, and the degree of cooperation of infants and young children is low, and the test time may be longer. Therefore, the design of the circulation system of the body scanning box for them needs to consider the gas composition factor, and external gas needs to be introduced for circulation.

[0029] The plethysmograph box of the present application is designed for use by adults, but is also compatible with older children with autonomous control capabilities. The box is large in size, and adults have better cooperation and tolerance, and the test time is short, so there is no need to consider the influence of gas composition. The air internal circulation design can simplify the structural design and reduce system complexity.

[0030] The box 1 is used to accommodate the person to be examined in an airtight manner. The box 1 has a door 11 that can be closed and opened. After the door 11 is closed, the inside of the box 1 is isolated from the outside environment to form an airtight space. The box 1 is provided with a pulmonary function test instrument and a body scanning box component 12. The pulmonary function test instrument is used to measure the pulmonary function parameters of the person to be examined, and the body scanning box component 12 is used for body scanning calibration and testing. The body scanning box component 12 may include a pressure detector, a gas detection sensor, calibration and testing hardware, etc.

[0031] After the person to be inspected enters the box 1, the door 11 of the box 1 is closed, and the interior becomes an airtight space. The heat dissipation of the human body and the gas produced by exhalation will quickly cause the temperature and humidity in the volume recording box to rise rapidly, thereby causing the box pressure to rise rapidly, causing changes in the environment in the box 1, and affecting the test results. In order to avoid the above factors affecting the test results, the present application sets up an air circulation system 2, and the air circulation system 2 is configured to use the gas in the box 1 for internal circulation purification. The air circulation system 2 mainly controls the temperature and humidity of the gas in the box 1. Although the internal circulation purification of the gas in the box 1 will cause the reduction of oxygen and the accumulation of carbon dioxide, since the volume of the volume recording box of the present application is mainly used for adults, the volume of the box 1 is relatively large, and the single-time lung function test time of a single person is only a few minutes. In the short test process, the effect of the change in gas composition on the test results is minimal, so the above unfavorable factors can be relatively ignored.

[0032] In the present application, the air circulation system 2 is installed outside the box 1. Specifically, the air circulation system 2 is installed on the top of the box 1 to reduce the occupied space on the plane.

[0033] In the present application, the air circulation system 2 includes an air inlet pipe 21, an air pump 22, a condenser 23, an air outlet pipe 24 and a controller 25. The gas in the box 1 circulates through the air inlet pipe 21, the air pump 22, the condenser 23 and the air outlet pipe 24 in sequence. The air pump 22 is a gas delivery mechanical device, which is used to extract air from the box 1. The air inlet pipe 21 and the air outlet pipe 24 are both connected to the box 1, and are used to extract and inlet air from the box 1 respectively. For ease of explanation, the gas discharged from the box 1 outside the air circulation system 2 through the air inlet pipe 21 is called input gas, and the gas that is processed by the air circulation system 2 and leaves the air circulation system 2 through the air outlet pipe 24 and enters the box 1 is called output gas. The condenser 23 is used to reduce the humidity in the conveying gas.

[0034] In order to be used in conjunction with the air circulation system 2, an air outlet and an air inlet are provided on the top of the box body 1, which penetrate the box body 1 and are used for exhaust and intake respectively. The input gas is discharged from the box body 1 through the air outlet, and after being processed in the air circulation system 2, the output gas enters the box body 1 through the air inlet, thereby circulating the gas in the box body 1 internally and controlling the temperature and humidity of the gas in the box body 1.

[0035] One end of the air inlet pipe 21 is connected to the inside of the box body 1 , specifically, connected to the air outlet of the box body 1 , and the other end of the air inlet pipe 21 is connected to the air pump 22 .

[0036] One end of the air outlet pipe 24 is connected to the inside of the box body 1 , specifically, connected to the air inlet of the box body 1 , and the other end of the air outlet pipe 24 is connected to the condenser 23 .

[0037] The condenser 23 is disposed between the air pump 22 and the air outlet pipe 24 and is used to dehumidify the gas in the box 1 .

[0038] The controller 25 is used to control the start or shut down of the air circulation system 2. The controller 25 can be provided with a button in the box 1, and the person to be detected or the staff can start or shut down the air circulation system 2 from the box 1.

[0039] The ends of the air inlet pipe 21 and the air outlet pipe 24 do not protrude from the air outlet hole and the air inlet hole, and do not occupy the space in the box body 1.

[0040] The air circulation system 2 in the present application also includes a pressure control component for controlling the gas pressure in the box 1 to keep the gas pressure in the box 1 stable.

[0041] The pressure control assembly in the present application includes a first gas container 26 and a second gas container 27. The first gas container 26 is arranged between the air inlet pipe 21 and the air pump 22, and the second gas container 27 is arranged between the condenser 23 and the air outlet pipe 24. The main function of the gas container is to buffer the compressed air and balance the system pressure. The first gas container 26 is used to stabilize the input gas pressure, and the second gas container 27 is used to stabilize the output gas pressure.

[0042] The air circulation system 2 in the present application also includes a filter component, which is used to filter and purify the gas, remove impurities and dust in the gas, and ensure the cleanliness of the air in the plethysmography box.

[0043] The filter assembly may filter the input gas, may filter only the output gas, or may filter both the input gas and the output gas.

[0044] A specific implementation of the present invention is to filter the input gas and the output gas twice.

[0045] The filter device in the present application includes a filter screen 28, which is disposed between the air inlet pipe 21 and the first air container 26 and is used to filter the input gas. The filter screen 28 can be made of non-woven fabric, metal wire mesh, glass fiber, nylon mesh, synthetic fiber felt, etc. The filtering accuracy can be set according to different usage requirements. In the case of higher requirements, glass fiber with higher filtering accuracy can be selected to improve the filtering efficiency and filtering effect.

[0046] The filtering device in the present application also includes a filter 29, which is arranged between the gas outlet pipe 24 and the second gas container 27, and is used to filter the output gas. In the case of higher requirements, the filter 29 can be selected as a medium-efficiency filter or a high-efficiency filter, so that the atmospheric environment in the plethysmograph box meets the requirements of the medical environment.

[0047] Optionally, the filter screen 28 may be replaced by a filter in other embodiments, and the filter 29 may be simplified to a filter screen.

[0048] The air circulation system in the present application also includes a noise reduction component, which is arranged between the filter screen 28 and the first air container 26. Since the air pump 22 inhales air into the box body 1 through one end of the air inlet pipe 21, noise is generated at the air outlet of the box body 1. The noise reduction component is used to reduce the noise generated during inhalation to avoid adverse effects on personnel being tested in the plethysmography box.

[0049] The noise reduction component in the present application includes a silencer 30. Specifically, an impedance composite silencer can be selected to utilize the sound absorption effect of the sound-absorbing material or the sound-absorbing structure to make the noise propagating along the pipeline attenuate with distance, thereby achieving the purpose of noise reduction.

[0050] Of course, a de-noising component may be further provided between the filter 29 and the air outlet pipe 24, and de-noising may also be performed at the air inlet of the housing 1 to reduce the noise generated when the filtered gas is discharged into the housing 1. When the de-noising component is provided at the above position, a de-noiser 30 may also be selected.

[0051] Of course, it is also possible to further install a noise reduction component, such as a sound insulation board, between the air circulation system 2 and the box 1 to isolate the noise generated by the air circulation system 2 outside the box 1 to the maximum extent, so that the plethysmography box can achieve a silent environment, and the subjects can be unaffected by external noise when tested in the plethysmography box.

[0052] The installation method of the volume tracer box of the present invention is as follows: one end of the air inlet pipe 21 is installed at the air outlet of the box body 1, and the other end of the air inlet pipe 21 is connected to the filter 28, the silencer 30, the first air container 26 and the air pump 22 in sequence, the air pump 22 is connected to the condenser 23, the second air container 27, the filter 29 and the air outlet pipe 24 in sequence, and the end of the air outlet pipe 24 is installed at the air inlet of the box body 1, and the controller 25 is electrically connected to the valves and motors of the air pump 22, the first air container 26, the second air container 27, and the filter 29.

[0053] The implementation method of the volume tracing box of the present invention is as follows: after the pulmonary function instrument is connected to the volume tracing test module of the volume tracing box, the operator can manually open the air circulation system 2, and the subject closes the box door 11 after entering the volume tracing box, and clicks to start the measurement after waiting for a while. During the human body test, the heat emitted by the human body heats the surrounding air, and part of the air is dissipated through the box body 1 itself, and part of the air is cooled, dried and purified through the air circulation system 2. The air in the entire box body 1 is always in a dynamic equilibrium flow state, and the subject will feel more comfortable when taking measurements therein, and will not feel stuffy and breathless like a traditional volume tracing box. It has been verified that as long as the air circulation system keeps the intake and outlet flow rates consistent, it will not have any effect on the measurement of the box pressure, so adding the air circulation system will have no effect on the test results. Since the box body 1 is large in volume and the test time is short, the change in the ratio of oxygen and carbon dioxide caused by the internal circulation of the gas can be ignored. The impact on the test results.

[0054] When using the plethysmograph box of the present invention, an air circulation system is configured in the plethysmograph box to circulate and purify the gas in the plethysmograph box, thereby reducing the temperature rise and humidity rise of the gas in the box caused by the human body, ensuring the stability of the gas environment in the box, and thus improving the detection accuracy of the plethysmograph box.

[0055] The above description is only an implementation mode of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A plethysmography box, characterized in that: The plethysmograph box comprises a box body and an air circulation system, wherein the box body is used to contain a person to be examined in an airtight manner, and the air circulation system is configured to use the gas in the box body for internal circulation purification.

2. The plethysmograph chamber according to claim 1, characterized in that The air circulation system is installed outside the box.

3. The plethysmograph box according to claim 1 or 2, characterized in that: The air circulation system comprises an air inlet pipe, an air pump, a condenser, an air outlet pipe and a controller, and the gas in the box circulates through the air inlet pipe, the air pump, the condenser and the air outlet pipe in sequence; One end of the air inlet pipe is connected to the box body, and the other end is connected to the air pump; One end of the air outlet pipe is connected to the box body, and the other end is connected to the condenser; The condenser is arranged between the air pump and the air outlet pipe; The controller is used to control the start or stop of the air circulation system.

4. The plethysmograph box according to claim 3, characterized in that The air circulation system also includes a pressure control assembly.

5. The plethysmograph box according to claim 4, characterized in that The pressure control assembly includes a first gas container and a second gas container, wherein the first gas container is arranged between the air inlet pipe and the air pump, and the second gas container is arranged between the condenser and the air outlet pipe.

6. The plethysmograph chamber according to claim 5, characterized in that The air circulation system also includes a filter assembly.

7. The plethysmograph chamber according to claim 6, characterized in that The filter device comprises a filter screen, and the filter screen is arranged between the air inlet pipe and the first air container.

8. The plethysmograph chamber according to claim 7, characterized in that The filtering device further comprises a filter, and the filter is arranged between the air outlet pipe and the second air container.

9. The plethysmograph chamber according to claim 8, characterized in that The air circulation system further comprises a noise removal component, and the noise removal component is arranged between the filter screen and the first air container.

10. The plethysmograph chamber according to claim 9, characterized in that The noise reduction component includes a muffler.

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