JP7431500B2 - Air conditioner air temperature equalization structure - Google Patents

Description

The present invention relates to a structure for uniformizing the temperature distribution of air flowing from the heating coil to the cooling coil in an outside air intake air conditioner equipped with a cooling coil downstream of the heating coil.

Air conditioning systems for buildings such as factories that require indoor temperature and humidity conditions to be kept within a certain range but require a large amount of exhaust air include circulation air conditioners that send temperature-controlled supply air into the room and suck in return air that has processed the indoor heat load. Some air conditioning systems include an outside air intake air conditioner (outside air conditioner) that separately controls the temperature of outside air by separating the outside air, which has a large heat treatment load during the summer and winter months when there are many disturbances, from the circulating air. In addition, in air conditioning systems in factories, it is necessary to temperature-regulate the same amount of outside air as the exhaust air and perform cooling dehumidification and heating humidification in order to keep the temperature and humidity within a certain range to prevent indoor disturbances due to process reasons. Air conditioners are required to run steam for heating and cold water for cooling all year round.

FIG. 5 shows an example of an outside air intake air conditioner (outside air conditioner). The outside air intake air conditioner 1 includes, in a housing 2, a filter 3 for purifying outside air A introduced from an outside air intake louver through an intake duct, and a preheating coil (first heating coil) for preheating the outside air A taken in. a cooling coil 5 for cooling the outside air A downstream of the first heating coil 4, and a heating coil (second heating coil) 6 for heating the outside air A downstream of the cooling coil 5. , and a fan 7 for generating airflow. In the example shown here, a steam type humidifier 8 is provided downstream of the second heating coil 6 and upstream of the fan 7.

The filter 3 is, for example, a roll-type filter in which the filter is stretched between a pair of rolls, and removes dust and dirt contained in the outside air (air) A. After a certain amount of operating time, clogging will occur, so by unwinding a predetermined length of filter sheet from one roll and winding up the filter sheet that was previously being used on the other roll, repeating this process will increase the length of the filter sheet. The dust removal performance of the dust accompanying the outside air A taken in from the atmosphere is maintained over a period of time.

The first and second heating coils 4 and 6 are steam coils that use low-pressure steam as a heating medium, and are made of a tube made of a highly thermally conductive material such as metal, and fins provided on the outside of the tube. It is made up of. The tube is arranged to meander vertically or horizontally with respect to the passing direction of the outside air A, for example, and is arranged so as to form a surface that intersects with the passing direction of the outside air A, and a heated high temperature (for example, The outside air A taken into the outside air intake air conditioner 1 is heated by bringing the outside air A into contact with the outer surface and the fins extending in contact with the outside surface while introducing steam at a temperature of about 120° C. to 140° C. It has become.

The cooling coil 5 is composed of a tube made of metal or the like and fins provided on the outside of the tube. The outside air A taken into the outside air intake air conditioner 1 is cooled by letting the outside air A come into contact with the outer surfaces of the tubes and fins while passing a refrigerant, which is cold water, through the tubes that meander up and down or left and right. ing.

The humidifier 8 is a device that humidifies the circulating outside air A, and is designed to increase the humidity of the outside air A by injecting steam to the outside air A after passing through the second heating coil 6. There is.

Under outdoor conditions such as summer when the dry bulb temperature and absolute humidity of the outdoor air are high, cold water is passed through the cooling coil 5 to cool the room, but depending on the dry bulb temperature conditions in the room where the outside air A is introduced, a second heating coil The fan 7 is operated by heating the outside air A to a predetermined temperature while passing steam through the fan 6 as a heating medium (operation of the first heating coil 4 is not necessary if the outside temperature is sufficiently high). Through the operation of the fan 7, outside air A is introduced from the inlet opening 2a of the housing 2, which is connected to the outside air intake louver through the outside air duct, and after removing dust and dirt through the filter 3, it passes through the cooling coil 5. Then, it is cooled by exchanging heat with the cold water flowing through the tube of the cooling coil 5. The outside air A is cooled by the cooling coil 5 to a temperature below the dew point of the outside air A, and moisture in the outside air A condenses on the surface of the cooling coil, and the condensed moisture condenses on the surface of the cooling coil 5. The outside air A, whose absolute humidity has been lowered by condensing in the outside system at a saturated water vapor partial pressure or higher and having moisture taken away, passes through the second heating coil 6 further downstream, and is heated by the second heating coil 6. It exchanges heat with the steam flowing through the tube of the coil 6 and is heated again. In this way, the outside air A that has been adjusted to an appropriate temperature and humidity is supplied from the fan 7 to a room to be air-conditioned (not shown).

In addition, under conditions where the outside temperature is low, such as in winter, the outside air A is heated while passing steam through the first heating coil 4, which is a preheating coil, in addition to the second heating coil 6, and the cooling coil located downstream The fan 7 is operated while trying to prevent the refrigerant No. 5 from freezing. Operation of the cooling coil 5 is unnecessary if the absolute humidity of the outside air is sufficiently low. However, due to daily differences, the outside temperature often rises on the same day and cooling becomes necessary, and it is not possible to drain the refrigerant from the cooling coil 5. Through the operation of the fan 7, outside air A introduced from the inlet opening 2a of the housing 2 is filtered to remove dirt and dust by the filter 3, and then passes through the first heating coil 4. It is heated by exchanging heat with the steam flowing inside the tube. Furthermore, the outside air A passes through the second heating coil 6 on the downstream side, exchanges heat with the steam flowing in the tube of the second heating coil 6, and is heated to a sufficient temperature. When the absolute humidity of the outside air temperature is insufficient for the required humidity, the humidifier 8 is activated to increase the humidity of the outside air A. The outside air A, which has been adjusted to an appropriate temperature and humidity, is supplied from the fan 7 to a room to be air-conditioned (not shown).

Note that, as a document describing technology related to this type of air conditioner, there is, for example, the following Patent Document 1.

Japanese Patent Application Publication No. 2011-174650

In the operation of the outside air intake air conditioner 1 as described above, some devices may not be used depending on the season or conditions. That is, if the outside temperature is sufficiently high, it is not necessary to operate the first heating coil 4, and when the outside temperature is low, the cooling coil 5 is not operated. However, even if these devices are not used for a certain period of the day, they do not allow outside air A into the room, where the temperature and humidity can change significantly even during the day due to changes in the weather or low pressure. In order to control the temperature to a predetermined temperature and humidity, the refrigerant or heat medium inside the coil may be flowed out at the next moment. This allows outside air A to pass through the first heating coil 4 and cooling coil 5 regardless of the season or conditions, even if the control valve does not operate the flow and the refrigerant or heat medium is stagnant. .

Here, if the outside air intake air conditioner 1 is operated in a state where water, which is a refrigerant, remains in the tube of the cooling coil 5 in winter, etc., the cooling coil 5 loses heat due to the flow of cold outside air A. The water inside may freeze, causing deformation or damage to the tube. Of course, this kind of situation can be prevented if the outside air A is sufficiently and uniformly heated by the first heating coil 4 located upstream of the cooling coil 5, but especially in steam-type heating coils, overheating Even if the steam is introduced into the heating coil as a gas, when the heat possessed by the superheated steam is applied to the outside air A via the heating coil, the superheated steam itself condenses and undergoes a phase change to liquid water. The phase-changed water then accumulates at the bottom of the heating coil due to the action of gravity, and the phases tend to separate clearly, with high-temperature steam at the top and low-temperature water at the bottom. For this reason, there is a situation in which variations in air heating performance tend to occur from part to part. Whether the steam flowing in the tube is extended horizontally and reciprocated, or vertically extended and reciprocated, the gas vapor changes to liquid water with a greatly different density due to phase changes associated with heat exchange, including the block part. As a result, a temperature difference occurs between the upper and lower tubes, and the heat exchange efficiency at the lower part of the coil decreases due to the small relative temperature difference and intermittent drainage in the trap. In particular, when the tubes are arranged to meander horizontally left and right, and steam is introduced from above and extracted from below, the heat exchange efficiency below the heating coil tends to be low.

Therefore, when the outside air intake air conditioner 1 as shown in FIG. 5 is operated in winter, even if the first heating coil 4 is operated, the outside air A passing through the lower position of the first heating coil 4 may The temperature does not rise much from the outside temperature, and reaches the cooling coil 5 at a low temperature. The supply of heat to the first heating coil 4 is controlled, for example, by adjusting the amount of steam supplied based on the temperature of the outside air A downstream of the first heating coil 4. In most cases, the air temperature measurement point used as the heating coil 4 is set at the vertical center of the first heating coil 4 when viewed from the downstream side, or at a position inserted from the upper surface of the downstream casing. Therefore, the temperature of the outside air A passing through the lower part of the first heating coil 4 is not taken into account in the temperature control of the outside air A.

In addition, when the outside temperature is so low that there is a concern that freezing may occur in the cooling coil 5, the first There is also a method of forcibly opening the control valve for the steam introduced into the heating coil 4 to raise the temperature of the outside air A flowing into the cooling coil 5, but when such control is performed, the required amount of outside air A is There may be situations where the first heating coil 4 supplies an excessive amount of heat relative to the temperature, or where the cooling coil 5 cancels out the excess heat in order to maintain a predetermined temperature and humidity at the outlet opening 2b of the housing 2. The state is such that cold heat is supplied, and the energy generated for hot and cold heat is inefficient.

In view of these circumstances, the present invention provides a structure for equalizing the air temperature downstream of the preheating section inside an air conditioner, which has a simple structure and can effectively prevent freezing of the cooling coil while avoiding excessive supply of energy. This is what I am trying to do.

The present invention is an air temperature equalization structure for an air conditioner used in an outside air intake air conditioner,
Inside the housing of the air conditioner,
In order to heat the outside air introduced through the outside air duct , superheated steam as a heating medium is passed through the tube and the heat held by the superheated steam is given to the outside air.The superheated steam itself condenses and changes its phase to liquid water, which flows to the bottom of the tube. a first heating coil that is a steam coil that accumulates under the action of gravity;
a cooling coil that is provided downstream of the heating coil and includes a tube through which cold water flows to cool the outside air;
a baffle plate arranged along the same plane orthogonal to the flow of outside air so as to block only the upper and lower sides of the flow path of outside air between the heating coil and the cooling coil,
The upper baffle plate and the lower baffle plate constituting the baffle plate each have a width enough to block the entire width direction of the first heating coil when viewed from the downstream side ,
The heights of the upper baffle plate and the lower baffle plate constituting the baffle plate are each 5% or more and 15% or less of the height of the heating coil,
Although the introduced outside air flows in one direction from the inlet opening to the exit opening within the housing, the flow of outside air between the first heating coil and the cooling coil is blocked from above and below by the baffle plate, and only a portion The direction of the air is bent every time, and the outside air goes through a state of sudden contraction and expansion, and vortices are generated from the turbulence of the airflow, and the whole air is violently disturbed and mixed.
Due to the low heat exchange efficiency between the water and the outside air below the first heating coil, the outside air temperature immediately after the first heating coil no longer has a distribution of being high at the top of the flow path and low at the bottom. The outside air at a uniform temperature is then flowed to the downstream cooling coil.
This invention relates to an air temperature equalization structure for an air conditioner characterized by the following.

In the air temperature equalization structure for an air conditioner according to the present invention, the upper baffle plate is fixed to an upper reinforcing member provided on the ceiling of the casing via a mounting bracket,
It is preferable that the lower baffle plate is fixed to a lower reinforcing member provided on a floor surface of the housing via a mounting bracket .

According to the air temperature equalization structure of the air conditioner of the present invention, it is possible to achieve the excellent effect of effectively preventing freezing of the cooling coil while avoiding excessive supply of energy with a simple structure.

1 is a schematic cross-sectional view showing the configuration of an air conditioner according to a first embodiment of the present invention. It is an exploded perspective view showing the attachment structure of the baffle plate in a first example. FIG. 2 is a perspective view illustrating the arrangement of air temperature measurement points in a test to demonstrate the air temperature uniformity performance of the air conditioner of the first embodiment. FIG. 2 is a schematic cross-sectional view showing the configuration of an air conditioner according to a second embodiment of the present invention. FIG. 1 is a schematic cross-sectional view showing an example of the configuration of a conventional outside air intake type air conditioner.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

Figures 1 and 2 show an example of the configuration of an air conditioner to which the air temperature equalization structure of the present invention is applied, and in the figures, parts with the same symbols as in Figure 5 represent the same parts. There is.

The basic configuration of the first embodiment is the same as that of the conventional example (see FIG. 5), and as shown in FIG. A roll-type filter 3 for purifying outside air A, a first heating coil 4 for preheating the taken outside air A, a cooling coil 5 for cooling outside air A, and a second heating coil for reheating outside air A. It is equipped with a coil 6, a fan 7 that creates airflow, and a steam-type humidifier 8.

In the case of the first embodiment, a baffle plate 9 is installed downstream of the first heating coil 4 and upstream of the cooling coil 5 in order to equalize the temperature of the outside air A flowing to the cooling coil 5. It is characterized by the fact that

As shown in FIGS. 1 and 2, the baffle plate 9 is arranged so as to block the upper and lower parts of the flow path of the outside air A. The upper baffle plate 9a and the lower baffle plate 9b are arranged so as to be perpendicular to the flow of outside air A from the inlet opening 2a to the outlet opening 2b, and are arranged along the same plane. "Arrangement perpendicular to the flow of outside air A" and "arrangement along the same plane" mean that the upper and lower baffle plates 9a, 9b are exactly orthogonal to the flow direction of outside air A, and This does not necessarily mean that the baffles 9a and 9b are exactly flush with each other.The baffle plates 9a and 9b only need to suitably exhibit the effect of bending the flow of the outside air A, as will be described later, and the direction of their respective surfaces is such that the direction of the outside air A is There is no problem even if the direction is slightly deviated from the direction perpendicular to the flow, or if the surfaces formed by each other are slightly inconsistent). The flow path for outside air A formed by the casing 2 has a rectangular cross-sectional shape as shown in FIG. It has a shape. The upper and lower baffle plates 9a, 9b each have a width sufficient to block the entire widthwise area of the first heating coil 4 when viewed from the downstream side. The height of the baffle plates 9a, 9b is 5% or more and 50% or less of the height of the first heating coil 4, more preferably 3% or more and 25% or less, and still more preferably 5% or more. It is 15% or less. This numerical range is preferable because if the dimension in the height direction of the baffle plates 9a and 9b is too small, the effect of equalizing the air temperature, which will be described later, will be reduced, while if the dimension is too large, the pressure will be This is because the loss will be excessive.

The upper baffle plate 9a is arranged on the downstream side of the first heating coil 4 so as to cover the upper end of the first heating coil 4 when viewed from the downstream side, and the lower baffle plate 9b is arranged on the downstream side of the first heating coil 4. It is arranged downstream of the heating coil 4 so as to cover the lower end of the first heating coil 4 when viewed from the downstream side. When installing the upper baffle plate 9a, for example, as shown in FIG. , and fix the upper baffle plate 9a to another side. In addition, when installing the lower baffle plate 9b, one side corresponding to the bottom of the right triangular mounting bracket 11 is fixed to the lower reinforcing member 12 provided on the floor of the housing 2 along the flow path direction. , the lower baffle plate 9b may be fixed to another side. The mounting bracket 11 can be fixed to the upper reinforcing member 10 and the lower reinforcing member 12, and the baffle plate 9 can be fixed to the mounting bracket 11 by, for example, using bolts (not shown), but other methods can also be used, such as welding or gluing. This may also be done using a drug or the like. The method of fixing the baffle plates 9a and 9b described here is just one example, and various fixing methods may be used as long as each baffle plate 9 can be arranged so as to form an appropriate surface with respect to the flow path of the outside air A. Of course, any other method may be adopted.

Here, in general air conditioners, a space is often provided between the heating coil and the cooling coil on the downstream side for workers to perform inspection and maintenance. Therefore, the baffle plate 9 as in the first embodiment can be easily installed between the first heating coil 4 and the cooling coil 5, and a similar baffle plate can be easily installed even in an existing air conditioner. It can be attached to. Further, since the members such as the baffle plate 9 and the mounting bracket 11 may have a simple structure, the space for inspection and maintenance will not be greatly encroached on when installed, and there is no fear of hindering inspection and maintenance work.

In this way, when the baffle plates 9a and 9b are installed above and below the flow path of the outside air A, the outside air A flowing above the flow path out of the outside air A that has passed through the first heating coil 4 is blocked by the upper baffle. The flow direction is bent downward by colliding with the plate 9a, and the outside air A flowing below the flow path collides with the lower baffle plate 9b and the flow direction is bent upward. The vertically directed flows collide with each other at the center of the flow path, and mix with the outside air A flowing through the center. In other words, a situation of rapid contraction and expansion occurs in which the flow path area is suddenly narrowed in the cross section of the air conditioner 1 in the air flow direction due to the baffles 9a and 9b, and then rapidly expanded. In a flow path with such a shape, flow path resistance occurs in the flowing air, but upstream of the baffle where the air flow is limited by the cross-sectional area of the casing and the surface velocity is constant within a certain range, the movement When the pressure was constant within a certain range and the static pressure was low, the dynamic pressure was converted to static pressure at the rapidly contracting part where the airflow collided with the baffle plates 9a and 9b, and then the flow path In the center of the area, the surface velocity increases and part of the static pressure is converted to dynamic pressure, and in the rapidly expanding part, the fast dynamic pressure suddenly slows down, and a part of the dynamic pressure (conversion pressure) is converted again. Pressure fluctuations occur that are converted into static pressure. At this time, in the sudden contraction/expansion part, a vortex is generated due to the turbulence of the airflow, and the entire air is violently disturbed, and the separated flows forming layers due to temperature differences are mixed. The energy generated by this vortex consumes a little of the total pressure, but results in very good mixing.

As explained above, when the first heating coil 4 is operated, the heat exchange efficiency with the outside air A tends to vary depending on the position of the first heating coil 4, and as a result, the heating coil 4 Temperature non-uniformity occurs in the passing outside air A depending on the position through which it passes. That is, the temperature of the outside air A immediately after the heating coil 4 tends to exhibit a distribution in which it is generally higher on the upper side of the flow path and lower on the lower side. However, if the flow direction of the outside air A is bent and mixed in each section by the baffle plate 9 as in the first embodiment, the outside air A having a uniform temperature will flow into the downstream cooling coil 5.

Here, the first heating coil 4 is configured as a steam coil equipped with a tube through which heated steam flows, so that even if the tube is extended horizontally and reciprocated, the steam flowing inside the tube is Even if the water is reciprocated for an extended period of time, the phase change associated with heat exchange, including the block part, will result in liquid water with a density significantly different from that of gaseous vapor. Then, due to gravity, a temperature difference occurs between the upper and lower tubes along with the phase of the heating medium, and the water in the heating medium may stagnate due to the small relative temperature difference between the heating medium and the outside air A, or due to intermittent drainage in the trap. The heat exchange rate in the lower part decreases, and the above-mentioned temperature unevenness tends to occur. However, by providing the baffle plate 9 on the downstream side, the temperature of the outside air A can be made uniform simply and effectively.

Regarding the air conditioner 1 of the first embodiment, a demonstration test was conducted to verify the temperature distribution of the outside air A flowing into the cooling coil 5. FIG. 3 shows the positions of measurement points at which the temperature of outside air A was measured in this demonstration test (the positions of the same measurement points are also shown in FIG. 1 by broken lines). In this demonstration test, measurement points 13 (13a to 13i) were set at a total of nine locations downstream of the baffle plate 9 and upstream of the cooling coil 5. The nine measurement points 13 were arranged on the same plane perpendicular to the flow direction of the outside air A, in three stages at the top, middle and bottom in the flow direction, and three points each on the center and left and right sides. The fan 7 and the first heating coil 4 were operated, and the temperature of the outside air A was measured. The temperature of the outside air A measured at each measurement point 13 under the condition that the outside air temperature is 9.8° C. is as shown in Table 1 below.

The introduced outside air at 9.8°C is heated by passing through the first heating coil 4, and before flowing into the cooling coil 5 on the downstream side, the temperature is about 30°C in the middle stage and the temperature in the upper stage. Temperatures of around 33°C were measured in each case. In the lower stage, the temperature of outside air A is at least 15.4°C, and in the middle stage, under operating conditions where the temperature is about 20°C higher than the outside temperature, the temperature in the lower stage is maintained at least 5°C higher than the outside temperature. was. That is, as a result of the outside air A being stirred by the action of the baffle plate 9, the temperature distribution on the downstream side of the first heating coil 4 is made uniform, and a part of the outside air A that has flowed in at the outside temperature remains almost at the outside temperature. It can be said that the situation where the water flows into the cooling coil 5 has been improved.

Incidentally, such a stirring structure using a baffle plate can also be applied to a configuration different from the outside air intake air conditioner 1 as described in the first embodiment. For example, as shown in the second embodiment in FIG. Even for a configuration in which a humidifier (which vaporizes air as it passes) is installed, the same effect can be obtained by installing a baffle plate 9 on the downstream side of the first heating coil 4. Can be done. That is, regardless of the type of structure in which the cooling coil is arranged downstream of the heating coil, by installing a baffle plate such as the baffle plate 9 between the heating coil and the cooling coil, the heating coil can be cooled. It is possible to stir the air passing through to equalize the temperature. Furthermore, the outside air intake air conditioner 1 may be an internal air conditioner (indoor circulation type), and may be applied to an air conditioner that exhausts part of the return air and introduces the same amount as outside air.

As described above, in each of the above embodiments, in order to heat the introduced outside air A, there is a first heating coil 4 which flows heat medium vapor through a tube to form a steam coil, and a downstream side of the heating coil 4. A cooling coil 5 that is provided with a tube through which a refrigerant flows to cool the outside air A, and a cooling coil 5 that is perpendicular to the flow of the outside air A so as to block the upper and lower sides of the flow path of the outside air A between the heating coil 4 and the cooling coil 5. baffle plates 9a and 9b arranged along the same plane. By doing so, the flow direction of the outside air A can be bent and mixed in each section by the baffle plate 9, and the outside air A having a uniform temperature can be allowed to flow to the downstream cooling coil 5.

In the air temperature equalization structure of the air conditioner of each of the above embodiments, the heights of the upper baffle plate 9a and the lower baffle plate 9b constituting the baffle plate 9 are each 5% of the height of the heating coil 4. It can be set to 50% or less. In this way, in the case of 5%, if the outside air A is scaled down and expanded so as to lift only the lower part, the lifted outside air A can collide with the warm airflow above. On the other hand, in the case of 50%, the surface speed of the outside air A suddenly doubles and then quickly becomes 1x, creating many vortices, but with this surface speed difference, the pressure loss is several tens of Pa, and the fan power Since this is a speed range that does not have a large effect on the temperature of the outside air A and also prevents the problem of the outside air A not expanding rapidly with a normal housing length, the temperature of the outside air A can be made uniform particularly effectively.

In the air temperature equalization structure of the air conditioner of each of the above embodiments, the flow path of the outside air A between the heating coil 4 and the cooling coil 5 is blocked from above and below by the baffles 9a and 9b, so that the outside air A does not suddenly contract or expand rapidly. Depending on the state, many vortices can be generated, and in this way, the temperature of the outside air A can be effectively uniformized in the outside air intake air conditioner 1 equipped with the heating coil 4 which is a steam coil.

When the air temperature equalization structure of the air conditioner of each of the above embodiments is used in the outside air intake air conditioner (outside air conditioner) 1, it is possible to easily and suitably equalize the temperature of the outside air A taken in.

Therefore, according to the above embodiment, freezing of the cooling coil can be effectively prevented while avoiding unnecessary supply of energy with a simple structure.

It should be noted that the air temperature equalization structure of the air conditioner of the present invention is not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

4 Heating coil (first heating coil)
5 Cooling coil 9 Baffle plate 9a Baffle plate (upper baffle plate)
9b Baffle plate (lower baffle plate)
A Outside air

Claims (2)

An air temperature equalization structure for an air conditioner used in an outside air intake air conditioner,
Inside the housing of the air conditioner,
In order to heat the outside air introduced through the outside air duct , superheated steam as a heating medium is passed through the tube and the heat held by the superheated steam is given to the outside air.The superheated steam itself condenses and changes its phase to liquid water, which flows to the bottom of the tube. a first heating coil that is a steam coil that accumulates under the action of gravity;
a cooling coil that is provided downstream of the heating coil and includes a tube through which cold water flows to cool the outside air;
a baffle plate arranged along the same plane orthogonal to the flow of outside air so as to block only the upper and lower sides of the flow path of outside air between the heating coil and the cooling coil,
The upper baffle plate and the lower baffle plate constituting the baffle plate each have a width sufficient to block the entire width direction of the first heating coil when viewed from the downstream side ,
The heights of the upper baffle plate and the lower baffle plate constituting the baffle plate are each 5% or more and 15% or less of the height of the heating coil,
Although the introduced outside air flows in one direction from the inlet opening to the exit opening within the housing, the flow of outside air between the first heating coil and the cooling coil is blocked from above and below by the baffle plate, and only a portion The direction of the air is bent every time, and the outside air goes through a state of sudden contraction and expansion, and vortices are generated from the turbulence of the airflow, and the whole air is violently disturbed and mixed.
Due to the low heat exchange efficiency between the water and the outside air below the first heating coil, the outside air temperature immediately after the first heating coil no longer has a distribution of being high at the top of the flow path and low at the bottom. The outside air at a uniform temperature is then flowed to the downstream cooling coil.
The air temperature equalization structure of the air conditioner is characterized by: The upper baffle plate is fixed to an upper reinforcing member provided on the ceiling of the casing via a mounting bracket,
The air temperature equalization structure for an air conditioner according to claim 1 , wherein the lower baffle plate is fixed to a lower reinforcing member provided on the floor of the housing via a mounting bracket .

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