JP2014219180A - Air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioning system capable of preventing growth of disease agents in patient bedrooms.SOLUTION: An air conditioning system 1 comprises: a radiation air conditioner 10 provided on a ceiling C of a patient room R; an exhaust port 22 provided in the ceiling C above beds B installed in the patient room R; and partitioning members 30 provided adjacent to the beds B for partitioning the patient room R into surrounding spaces of the respective beds B.

Description

  The present invention relates to an air conditioning system.

  Conventionally, in a hospital room, when an infectious disease patient who is infected via air such as tuberculosis coughs or sneezes, pathogens may spread. Therefore, in order to reduce infection by infectious diseases, an air supply / exhaust treatment system has been proposed in which an air supply / exhaust fan, a total heat exchanger, and an air filter are integrally provided on the ceiling of a hospital room (see Patent Document 1 below).

  In this air supply / exhaust processing system, the external air supplied from the external air supply port and the exhaust from the hospital room are heat-exchanged by the total heat exchanger. Then, the heat-exchanged air is filtered through an air filter, and supplied from the air supply / exhaust fan to the hospital room.

JP 2002-106906 A

  Here, in the air supply / exhaust treatment system described in Patent Document 1, air supplied is circulated in the hospital room and air-conditioning is performed. Therefore, a pathogen of one patient is exhausted after circulating in the hospital room. The For this reason, when there is another patient in the hospital room, there is a possibility that the pathogen may be infected to the other patient.

  Then, this invention is made | formed in view of the said situation, and provides the air-conditioning system which can prevent the spreading | diffusion of the pathogen in a sickroom.

In order to achieve the above object, the present invention employs the following means.
That is, the air conditioning system according to the present invention is provided adjacent to the bed, a radiation type air conditioner provided on the ceiling of the hospital room, an exhaust port provided on the ceiling above the bed arranged in the hospital room. And a partition member that partitions the surrounding space.

  In such an air conditioning system, when there is a patient having a pathogen in the room, the pathogen emitted from the patient in the bed is restricted from moving in the horizontal direction by the partition member, and is provided on the ceiling above the bed. It is exhausted from the exhaust port. Furthermore, since the temperature of the air in the hospital room is adjusted in a state where the air flow is suppressed by the radiation type air conditioner, the movement of the pathogen can be suppressed. Therefore, it is possible to prevent the pathogen from spreading in the hospital room.

  In the air conditioning system according to the present invention, it is preferable that a plurality of the beds are arranged in the hospital room, and the partition member is arranged between the plurality of beds.

  In such an air conditioning system, since the pathogen emitted from the patient in one bed is restricted from moving in the horizontal direction by the partition member, it is possible to prevent the pathogen from spreading to the patient in the adjacent bed.

  Moreover, the air conditioning system which concerns on this invention WHEREIN: The said exhaust port may be provided in the said ceiling facing the pillow side of the said bed.

  In such an air conditioning system, since the patient lying on the bed has an exhaust port above the mouth from which the pathogen is ejected, the injected pathogen can be quickly exhausted.

  The air conditioning system according to the present invention may further include an air supply port provided in the ceiling.

  In such an air conditioning system, air supplied from the ceiling passes through the bed and is exhausted from an exhaust port provided above the bed, so that the air in the hospital room can be ventilated.

  According to the air conditioning system of the present invention, it is possible to prevent the spread of pathogens in a hospital room.

It is the perspective view which cut away some hospital rooms concerning one embodiment of the present invention. It is (a) floor plan and (b) ceiling plan of a hospital room concerning one embodiment of the present invention. It is a typical top view of the air-conditioning system concerning the example of the present invention. It is a figure which shows the structure of the air conditioning system which concerns on the Example of this invention. It is a typical top view of an air-conditioning system concerning a comparative example of the present invention. It is a figure which shows the structure of the air conditioning system which concerns on the comparative example of this invention. 7A and 7B show the contamination concentration distribution of the contaminant in the pattern A of the embodiment of the present invention, where FIG. 7A is a plan view of the contamination concentration distribution, and FIG. 7B is the contamination concentration distribution A in FIG. It is -A sectional drawing. FIG. 7 is a diagram illustrating a contamination concentration distribution of a contaminant in the pattern B of the embodiment of the present invention, where (a) is a plan view of the contamination concentration distribution, and (b) is A in FIG. 8A of the contamination concentration distribution. It is -A sectional drawing. FIG. 7 is a diagram illustrating the contamination concentration distribution of the contaminant in the pattern C of the embodiment of the present invention, where (a) is a plan view of the contamination concentration distribution, and (b) is A in FIG. 9A of the contamination concentration distribution. It is -A sectional drawing. FIG. 7 is a diagram illustrating the contamination concentration distribution of a contaminant in the pattern D of the comparative example of the present invention, where (a) is a plan view of the contamination concentration distribution, and (b) is A of the contamination concentration distribution in FIG. It is -A sectional drawing.

  An air conditioning system according to an embodiment of the present invention will be described.

As shown in FIG.1 and FIG.2, the air conditioning system 1 which concerns on this embodiment is provided in the hospital room R of a hospital.
First, the hospital room R will be described.
The hospital room R includes a floor F, four walls W erected from the floor F, and a ceiling C facing the floor F.
Here, for convenience, the extending direction of the wall W1 in the wall W is defined as the X direction, and the extending direction of the wall W2 orthogonal to the wall W1 is defined as the Y direction. This wall W2 is provided with a window M that can be opened in the X direction. Moreover, the outdoor side of the wall W3 facing the wall W2 is a corridor (not shown) that leads to another hospital room.

In this hospital room R, four beds B are arranged.
Specifically, beds B1 and B2 are provided on the wall W1 so as to be spaced apart from each other in the X direction. Pillows H are respectively arranged on the walls W1 side of the beds B1 and B2. Further, the wall W4 facing the wall W1 is also provided with beds B3 and B4 spaced apart in the X direction, similarly to the wall W1. Pillows H are also arranged on the walls W4 side of the beds B3 and B4.

Next, the air conditioning system 1 will be described.
The air conditioning system 1 includes a radiant air conditioner 10 (see FIG. 2B) provided on the ceiling C of a hospital room R, an air supply port 21 and an exhaust port 22, and a partition member 30 provided between adjacent beds B. And.

The radiant air conditioner 10 includes, for example, a heat exchanger (not shown) provided above the ceiling C, and a plurality of radiant panels 11 connected to the heat exchanger by piping (not shown). Inside the radiation panel 11, a flow pipe (not shown) through which hot water or cold water heat-exchanged by a heat exchanger flows is embedded. In the present embodiment, the radiation panel 11 includes four first radiation panels 12 arranged on the ceiling above the four beds B, the first radiation panel 12 above the bed B1, and the first radiation panels 12 above the bed B3. The second radiation panel 13 is disposed between the first radiation panel 12 and the second radiation panel 13.
In the present embodiment, the second radiation panel 13 is disposed between the first radiation panels 12 and 12 on the wall W2 side in the X direction, but the first radiation panel 12 on the wall W3 side in the X direction. , 12 may also be arranged.

The air supply port 21 is provided substantially in the center of the ceiling C in plan view, and can supply outside air into the patient room R.
The exhaust port 22 is provided on the pillow H side of the ceiling C above each bed B, and can discharge the air in the hospital room R to the outside. In the present embodiment, four exhaust ports 22 are provided corresponding to the number of beds B.

  Moreover, the partition member 30 is provided adjacent to the bed B so as to partition the surrounding space. In other words, the partition member 30 partitions the space around the bed B1 and the space around the bed B2. Similarly, the partition member 30 partitions the space around the bed B3 and the space around the bed B4.

  The partition member 30 includes a plate-like panel portion 36 erected from the floor F, and a storage portion 37 that can store clothes (not shown) and medical gas pipes (not shown) provided on the panel portion 36. And have. The upper end of the partition member 30 does not reach the ceiling C, and a gap is provided between the partition member 30 and the ceiling C.

  The partition member 30 includes a first panel 31 provided between the bed B1 and the bed B2, and a second panel 32 provided between the bed B3 and the bed B4.

Next, the operation of the air conditioning system 1 in the hospital room R configured as described above will be described.
It is assumed that the patient who uses the bed B1 has a pathogen.
Here, the patient's own heat generates an upward airflow around the patient. Further, since the first panel 31 and the walls W1, W2 are erected from the floor F around the bed B1, the horizontal movement of the air is restricted by the first panel 31 and the walls W1, W2. .
Therefore, the pathogen emitted from this patient is controlled to move in the horizontal direction by the first panel 31 and the walls W1, W2, and moves upward according to the rising airflow. And it exhausts out of the hospital room R from the exhaust port 22 above the bed B1.

  Moreover, when warm water distribute | circulates in the distribution pipe of the radiation panel 11 of the radiation type air conditioner 10, the radiation panel 11 is warmed and radiant heat is transmitted toward the inside of the hospital room R from the surface of the radiation panel 11. Thereby, the air in the hospital room R is warmed.

  On the other hand, when cold water circulates in the flow pipe of the radiation panel 11 of the radiation type air conditioner 10, the radiation panel 11 is cooled and the radiation panel 11 takes the heat in the hospital room R. Thereby, the air in the hospital room R is cooled.

In the air conditioning system 1 configured in this way, the pathogen emitted from the patient in one bed B is restricted from moving in the horizontal direction by the partition member 30 and the wall W, and the exhaust provided on the ceiling C above the bed B. The air is exhausted from the port 22. Therefore, since a pathogen can be rapidly discharged | emitted from the exhaust port 22 located above the mouth of the patient who lies on one bed B, spreading | diffusion of the pathogen with respect to the patient of the adjacent bed B can be prevented.
For example, in the case where a plurality of beds B are arranged in the room R and the pathogen is sterilized without being noticed, infection of the pathogen to a large number of patients can be prevented in advance. It is valid.

Thus, since the risk of air infection and the risk of droplet infection are reduced, a safer room space can be provided.
Furthermore, when a pathogen is infected, enormous human costs and treatment costs are required for the subsequent care, and these costs can be suppressed by preventing infection in advance.

  Furthermore, since the radiation type air conditioner 10 adjusts the temperature of the air in the hospital room R with the air flow suppressed, the temperature in the hospital room R is kept comfortable while preventing the pathogen from spreading in the hospital room R. be able to.

  Further, the air supplied from the air supply port 21 provided on the ceiling C passes through the bed B and is exhausted from the exhaust port 22 provided above the bed B. Can be ventilated.

  Further, a space surrounded by the wall W and the partition member 30 is formed around the bed B. Therefore, the partition member 30 can ensure the privacy of the patient, and can store clothing and medical gas piping in the storage portion 37. Furthermore, the partition member 30 can also restrict the pathogen from moving to the other bed B side. Therefore, it is not necessary to separately provide a panel for ensuring the privacy of the patient and a panel for restricting the pathogen from moving to the other bed B side, so that the number of parts can be reduced.

(Examples and comparative examples)
Hereinafter, it demonstrates comparing with the Example experimented using said air-conditioning system 1, and the comparative example which employ | adopted the convection air-conditioning system.
As shown in FIG.3 and FIG.4, the Example is formed by the same structure as the hospital room R and the air-conditioning system 1 which were shown above. The exhaust port 22 provided above each bed B exhausts the air in the hospital room R to the outside through the duct 23. The air supply port 21 is connected to an air supply unit 25 provided outside by a duct 24 and supplies outside air into the patient room R.
3 and 4, EA represents exhaust, SA represents air supply, SOA represents air supply (outside air), VAV represents a variable air volume device, and OA represents outside air.

As shown in FIGS. 5 and 6, the comparative example is the same room R as the example.
Further, an exhaust port 51 is provided on the pillow B (see FIG. 1) side of the bed B of the ceiling C. The exhaust port 51 exhausts the air in the patient room R to the outside through the duct 52.
A circulation port 53 is also provided on the pillow H (see FIG. 1) side of the bed B on the ceiling C. The circulation port 53 introduces the air in the hospital room R into the air conditioner 55 through the duct 54. In addition, air supplied from an air supply unit 59 provided outside is introduced into the air conditioner 55 through a duct 56. The air conditioner 55 exchanges heat between the air from the circulation port 53 (return air) and the air from the air supply unit 59 (air supply), and the heat-exchanged air passes through the duct 57 from the air supply port 58 to the hospital room. Air is supplied into R. In addition, outside air is taken in twice per hour.
In FIGS. 5 and 6, EA is exhaust, SA is supply air, SOA is supply air (outside air), VAV is a variable air volume device, RA is return air, OA is outside air, and FCU is fan coil. Each unit is represented.

Both the examples and comparative examples were simulated under the following conditions.
A four-bed room on the north side during summer cooling is assumed.
The calorific value from the patient using the bed B is 64 W per person, and the total of 256 W is 4 persons. The amount of heat generated from the bedside lighting used for the base light is 60 W per unit, and the total of 240 units is 240 W. Moreover, the calorific value from the bedside illumination used for hand illumination is 7.7 W per piece, and the total of 4 pieces is 30.8 W. In addition, the amount of heat generated from the outlet is 40 W per unit, and four units total 160 W.

  The conditions for the contaminants are a particle size of 0.3 μm, a generation temperature of 37 ° C., and a generation amount of 60,000 per hour.

  In the air conditioning system of the example, the set temperature is 27 ° C. and the ceiling surface temperature is 20 ° C. As pattern A, outside air is taken in twice per hour, and the temperature at the air outlet 21 is 21.4 ° C. Further, as pattern B, outside air is taken in three times per hour, and the temperature of air blown from the air supply port 21 is set to 23.4 ° C. Further, as pattern C, outside air is taken in four times per hour, and the temperature at the air supply port 21 is set to 24.3 ° C.

  On the other hand, the air conditioning method of the comparative example is a convection air conditioning method, taking outside air twice per hour, setting the circulation air volume to a maximum of six times per hour, setting temperature 26 ° C, ceiling surface temperature 26 ° C, The blowing temperature is 19.6 ° C., and the collection efficiency of the filter is 15%. This condition is pattern D.

The result of the simulation carried out under the above conditions, assuming that pollutants are generated from the bed B1, will be described.
As shown in FIG. 7 to FIG. 9, it can be seen that in the examples, the greater the amount of outside air taken in, the lower the average pollution concentration of the pollutant and the more the diffusion of the pollutant is suppressed.
Further, when comparing the pattern A of the example and the pattern D of the comparative example, it can be seen that the diffusion of contaminants is suppressed more in the pattern A than in the pattern D.

Next, the running cost was simulated.
The running cost is the sum of the operating cost of the air conditioning system and the maintenance cost including replacement of the filter. Further, assuming that there are seven rooms R on the first floor, a nine-storey hospital is assumed.

As a result, the running costs of the patterns A to C of the example and the pattern D of the comparative example were calculated.
The running cost of the pattern A of the example was 1.2 million yen per year less than the running cost of the pattern D of the comparative example. Moreover, the running cost of the pattern B of an Example became equivalent to the running cost of the pattern D of a comparative example. In addition, the running cost of the pattern C of the example was slightly higher than the running cost of the pattern D of the comparative example.

From the above results, it can be seen that the pattern A of the example can suppress the diffusion of contaminants and the running cost more than the pattern D of the comparative example. Further, it can be seen that the pattern B of the example can effectively suppress the diffusion of the pollutant while having a running cost equivalent to the pattern D of the comparative example.
Therefore, by appropriately selecting the patterns A to C according to the conditions such as the cost, it is possible to adjust the suppression of the diffusion of the pollutant as compared with the comparative example.

  It should be noted that the assembly procedure shown in the above-described embodiment, or the shapes and combinations of the constituent members are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

  For example, in the present embodiment, an example in which the upper end of the partition member 30 does not reach the ceiling C and there is a gap between the upper end of the partition member 30 and the ceiling C has been described. You may reach C. In this case, since the movement of the air in the horizontal direction can be suppressed in the vertical direction from the floor F to the ceiling C, the movement of the pathogen in the horizontal direction can be more reliably blocked.

  Moreover, in this embodiment, although the partition member 30 is comprised by the member erected from the floor F, it may be a member like a curtain hanging down from the ceiling C, for example.

DESCRIPTION OF SYMBOLS 1 ... Air conditioning system 10 ... Radiation type air conditioner 21 ... Air supply port 22 ... Exhaust port 30 ... Partition member B ... Bed C ... Ceiling F ... Floor H ... Pillow R ... Hospital room

Claims (4)

A radiation-type air conditioner installed on the ceiling of the hospital room;
An exhaust port provided in the ceiling above the bed arranged in the hospital room;
An air conditioning system comprising: a partition member provided adjacent to the bed and partitioning a surrounding space. The air conditioning system according to claim 1,
A plurality of the beds are arranged in the hospital room,
The air conditioning system, wherein the partition member is disposed between the plurality of beds. In the air conditioning system according to claim 1 or 2,
The air conditioning system, wherein the exhaust port is provided in the ceiling facing the pillow side of the bed. In the air-conditioning system according to any one of claims 1 to 3,
The air conditioning system further comprising an air supply port provided in the ceiling.