JPH05133556A - Booth air conditioner - Google Patents

Abstract

PURPOSE:To reduce the load of a heat exchanger and extend its lifetime and, what is more, enhance a cooling capacity. CONSTITUTION:There are installed an open air duct 33 which guides the open air form an open air fan and an indoor air duct 34 which guides the indoor air from a circulation fan 57 cut off with a partitioning board 32 in a casing. An open air filter 35 is laid out in the open air duct 33 while a circulation filter 36 is laid out in the indoor air duct 34. A heat exchanger 37 is laid out and fixed in the rear side of the circulation filter 36 in the indoor air duct 34 so that only the indoor air flowing in the indoor air duct 34 may be heat- exchanged. Furthermore, the open air from the open air duct 33 and the heat- exchanged air from the indoor air duct are mixed with each other in an air mixing chamber 39 and introduced into a booth by means of a pressure fan.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a booth air conditioner, and more particularly, to a structure in which the outside air outside the booth and the indoor air inside the booth are mixed and recooled in the casing and then circulated again in the booth. Related to the improvement of.

[0002]

2. Description of the Related Art As a conventional air conditioner for a booth of this type,
The technique disclosed in Japanese Utility Model Publication No. 49-12741 can be mentioned.

As described in the above publication, generally, a booth air conditioner is mounted and fixed on the roof of a toll booth such as a toll road for the purpose of cooling and heating the inside of the booth. In the booth air conditioner, various devices such as a fan are arranged in a casing, the indoor air in the booth is introduced into the casing by the fan, and heat is exchanged by a heat exchanger. It circulates again in the booth.
Further, since the air in the booth is contaminated by exhaust gas discharged from the vehicle passing by the side of the booth, the air conditioner for the booth is usually not limited to the air in the booth in order to clean the air in the booth. The outside air outside the booth is also introduced into the casing. Then, the room air and the outside air introduced into the casing are mixed, the mixed air is passed through a heat exchanger for heat exchange, and the heat exchange air is circulated again in the booth. As a result, fresh air is constantly circulated in the booth, and the booth is maintained in a comfortable state.

[0004]

Since the conventional booth air conditioner is constructed as described above, after the indoor air inside the booth and the outside air outside the booth are mixed, the mixed air The heat will be exchanged by the heat exchanger. At this time, since the indoor air in the booth has the same temperature as the outside air immediately after the start of cooling / heating, the temperature of the mixed air passing through the heat exchanger becomes the same as the outside air temperature, but the cooling / heating starts for a predetermined time. After the lapse of time, the air after heat exchange is circulated in the booth, and there is always a temperature difference between the outside air introduced from outside the booth and the indoor air introduced from inside the booth. The mixed air is made to have an approximately intermediate temperature and is passed through the heat exchanger. That is, the indoor air introduced into the casing from the booth is at a temperature lower or higher than the outside air temperature. Therefore, cold air is constantly passed through the heat exchanger in the winter and hot air is passed in the summer.

In this case, from the point of influence on the heat exchanger, the heat exchanger is greatly affected by the hot air passing through the heat exchanger during heating, and particularly by the hot air passing through the heat exchanger during cooling. there is a possibility. That is, hot air from the outside of the booth is mixed with indoor air from the inside of the booth to form hot air, and as a result of passing through the heat exchanger, hot air having a temperature higher than that of the indoor air from inside the booth is constantly passed through the heat exchanger. Therefore, there is a possibility that the heat exchanger will be overloaded, the life of the heat exchanger will be shortened, and that the heat exchange efficiency will decrease and the cooling capacity will decrease.

Therefore, an object of the present invention is to provide a booth air conditioner that reduces the load on the heat exchanger, extends its life, and improves the cooling capacity.

[0007]

A booth air conditioner according to the present invention has, in a casing, an outside air passage for guiding outside air from an outside air fan and an indoor air passage for guiding indoor air from a circulation fan. It is provided so as to be cut off, and a heat exchanger is arranged on the indoor air air passage so as to exchange heat only with the indoor air flowing through the indoor air air passage, and downstream of the outside air air passage and the indoor air air passage, An air mixing chamber for mixing the outside air from the outside air passage and the heat exchange air from the indoor air passage is provided, and the mixed air in the air mixing chamber is introduced into the booth by a pressurizing fan. is there.

[0008]

In the present invention, the air passing through the heat exchanger is only the indoor air that has already undergone heat exchange inside the booth, and the outside air outside the booth does not pass through the heat exchanger. During cooling, the outside air that becomes high-temperature hot air that puts an excessive burden on the heat exchanger does not pass through the heat exchanger and is mixed with the heat exchange air in the air mixing chamber downstream of the heat exchanger. The load on the heat exchanger is reduced.

[0009]

EXAMPLES Examples of the present invention will be described below.

FIG. 1 is a perspective view showing the outer appearance of a booth air conditioner according to an embodiment of the present invention, FIG. 2 is a perspective view showing the internal structure of the booth air conditioner of the same embodiment, and FIG. Sectional view of the front of the booth air conditioner, FIG. 4 is a sectional view of the right side of the booth air conditioner of the same embodiment, FIG. 5 is a sectional view of the left side of the booth air conditioner of the same embodiment, and FIG. It is a plane sectional view of a booth air conditioner of an example.

In the figure, 1 is a substantially rectangular base fixed to the roof of a booth (not shown) such as a toll booth on a toll road, 2 is an outer wall forming a front wall, and 3 is both left and right side walls. Constituting outer walls, 4 is an outer wall fixed to the upper ends of the right sides of the outer walls 2 and 3 with screws or the like, 5 is a roof fixed to the upper ends of the left front half of the outer walls 2 and 3 with screws or the like, and 6 is the above It is a cover that covers the upper left part, the left part, and the rear part of the base 1. 6a is a plurality of ventilation holes formed in the upper wall of the cover 6,
Reference numeral 6b denotes a plurality of vent holes formed in the side wall of the cover 6. Reference numeral 7 is a hinge for connecting the roof 5 and the cover 6 to each other so that they can be opened and closed, and 8 is a handle fixed to the roof 5 and the cover 6, respectively. By moving the cover 6 up and down by the handle 8, the cover 6 is opened and closed with respect to the roof 5 via the hinge 7. Further, when the roof 8 is moved up and down by the handle 8 in a state where the fixing by the screw or the like is released, the roof 5 is opened and closed with respect to the cover 6 via the hinge 7. Reference numeral 9 is a casing of a booth air conditioner which is composed of the base 1, outer walls 2, 3, 4, roof 5, cover 6 and hinge 7.

Reference numeral 10 is a shield wall vertically provided below the boundary between the roof 5 and the cover 6. Reference numeral 11 denotes an inner wall vertically extending below a boundary portion between the outer wall 4 and the cover 6, and a front portion thereof has a substantially L-shaped cross section and is separated from the base 1, and a rear portion thereof together with the shielding wall 10 The inside of the casing 9 is divided into two in an airtight manner. Reference numeral 12 is an outdoor unit accommodating chamber formed by the cover 6, the shielding wall 10 and the rear portion of the inner wall 11. An outdoor unit 15 is housed and fixed in the outdoor unit housing chamber 12, and corresponds to an outdoor unit of a normal building air conditioner, and includes various devices (not shown) such as a compressor, a blower, and a heat exchanger. It is housed.

Reference numeral 31 denotes a swash plate fixed in the left-right direction between the lower end of the front portion of the inner wall 11 and the outer wall 3, and FIG.
As shown in FIG. 3, the front edge thereof is in close contact with the outer wall 2. Reference numeral 31a constitutes a front portion of the swash plate 31, an inclined portion which inclines downward and extends rearward, and 31b constitutes a rear portion of the swash plate 31, which extends substantially horizontally and has a rear edge and the shielding wall 10.
It is a horizontal portion that forms a predetermined gap between and.

Reference numeral 32 denotes a partition plate which is fixed in the left-right direction between the front portion of the inner wall 11 and the outer wall 3 and vertically divides the space between the swash plate 31 and the roof 5, and its front end. The edge is in close contact with the outer wall 2 and extends rearward, and like the swash plate 31, a predetermined gap is formed between the rear edge and the shielding wall 10. Reference numeral 33 is an upper part of the partition plate 32, an outside air passage formed by the partition plate 32, the outer wall 2 and the roof 5, 34 is a space between the partition plate 32 and the swash plate 31, and the partition plate 32, the outer wall 2 and the swash plate 31. And the partition plate 32 forms an air passage that is cut off from the outside air passage 33. Reference numeral 35 is an outside air filter fixed so as to extend over the entire left and right sides of the partition plate 32, and divides the outside air passage 33 by shielding it in the front and rear. Reference numeral 36 denotes the partition plate 32 and the inclined portion 31 of the swash plate 31.
It is a circulation filter that is fixed so as to extend in the entire left-right direction with respect to a, and divides the indoor air flow passage 34 by shielding it in the front and rear. 37 is the indoor air duct 34
And the partition plate 32 and the swash plate 31
A heat exchanger fixed between the heat exchanger 37 and the horizontal portion 31b of the heat exchanger 38 is a heater fixed behind the heat exchanger 37.

Reference numeral 39 is an air mixing chamber which is formed behind the outside air passage 33 and the indoor air passage 34 and communicates with the partition plate 32 and the shielding wall 10 through a gap. As a result, the heat exchanger 37 is connected to the partition plate 32.
As a result, only the air that is cut off from the outside air introduced into the air mixing chamber 39 from the outside air passage 33 and introduced into the air mixing chamber 39 from the indoor air passage 34 passes through the heat exchanger 37.

Reference numeral 40 denotes a plurality of flat plate-shaped air guides fixed on the upper surface of the partition plate 32 in the outside air passage 33 and in front of the outside air filter 35, as shown in FIG. The plates 32 are arranged in a zigzag pattern from the right end to the left end of the plate 32 at predetermined intervals, and each of them is provided with the outside air filter
It is fixed so as to form a slant at a predetermined angle with respect to the front surface of No. 5.

Reference numeral 41 is an inner wall that divides a space below the swash plate 31 into left and right sides, 42 is a first outlet chamber formed on the left side of the inner wall 41 so as to communicate with the air mixing chamber 39, and 43 is downward. And a partition plate 43a that is obliquely provided to partition the space formed on the right side of the inner wall 41 into an oblique shape, and 43a is the partition plate 43.
A lower end of a circular hole 44 formed in the communication port is connected to the inside of a booth (not shown), and an upper end thereof is formed into the partition plate 43.
A circular suction pipe communicating with the closed hole 43a, and the partition plate 43 and the circulation suction pipe 44 constitute a double pipe. Reference numeral 45 denotes a second blowout chamber formed below the partition plate 43, which is hermetically shielded from the air mixing chamber 39 by the inner wall 41 and communicates with the inside of the booth. Reference numeral 46 denotes a pressurizing fan disposed in the first blowout chamber 42, the blowout port of which is attached to the inner wall 41 to suck the mixed air in the air mixing chamber 39 into the first blowout chamber 42. It is possible to blow air to the second blowing chamber 45.

Reference numeral 47 is a control box for accommodating a control panel (not shown) arranged between the outer wall 3 and the rear portion of the inner wall 11. Reference numeral 48 is an intake port fixed to the outer wall 4 and communicating with the outside of the casing 9, 49 is an inner wall that divides a space in front of the control box 47 into front and rear, and 50 is the control box 47 and the inner wall 4.
9, a first intake chamber communicating with the intake port 48, 51 is an inner wall that vertically divides a space in front of the first intake chamber 50, and 52 is a first wall formed above the inner wall 51. Two
The intake chamber 53 is an outside air fan disposed in the first intake chamber 50, and its outlet is attached to the inner wall 51 as shown in FIG. 48 into the first intake chamber 50, and the second intake chamber 5
It is possible to blow air to 2. Reference numeral 54 is a communication port formed in the front portion of the inner wall 11 to connect the second intake chamber 52 and the outside air passage 33.

Reference numeral 55 denotes a first circulation chamber formed above the partition plate 43, which is hermetically shielded from the air mixing chamber 39 by the inner wall 41 and has a circulation suction pipe 44. It is connected to the inside of the booth via. 5
Reference numeral 6 denotes a second circulation chamber formed above the first circulation chamber 55, which communicates with the first circulation chamber 55 and is airtight with the first intake chamber 50 and the second intake chamber 52. It is shielded in a shape. Reference numeral 57 denotes a circulation fan disposed in the second circulation chamber 56, the outlet of which is attached to the front portion of the inner wall 11 so that the room air in the booth is passed through the circulation suction pipe 44 to the first circulation chamber. Suction from 55 into the second circulation chamber 56,
The air can be blown to the indoor air passage 34.

Next, the operation of the booth air conditioner of the present embodiment constructed as described above will be explained.

First, the operation of the booth air conditioner is started,
When the circulation fan 58 is driven, the circulation fan 58 causes the indoor air in the booth to flow from the circulation suction pipe 44 to the first circulation chamber 5.
5 into the second circulation chamber 56, and the indoor air duct 3
It blows to the front side of 4 and blows air. The air blown to the front side of the indoor air passage 34 is guided from the right end to the left along the outer wall 2, the swash plate 31, and the partition plate 32 forming the indoor air passage 34, and is introduced. After passing through the circulation filter 36, dust in the air is removed. The air that has passed through the circulation filter 36 is guided to the rear side of the indoor air duct 34 along the partition plate 32, and the circulation filter 36
After passing through the heat exchanger 37 at the rear of the heat exchanger to be heat-exchanged, it is introduced into the air mixing chamber 39.

On the other hand, when the outside air fan 53 is driven, the outside air fan 53 sucks the outside air, which is fresh air outside the booth, from the intake port 48 into the first intake chamber 50 and blows it out to the second intake chamber 52. .. Further, the outside air blown into the second intake chamber 52 is sent to the front side of the outside air passage 33 through the communication port 54. The outside air blown to the front side of the outside air passage 33 is guided along the outer wall 2, the roof 5, and the partition plate 32 forming the outside air passage 33 from the right end to the left, and is introduced into the air guide. Guided by 40, the dust in the air is removed after passing through the outside air filter 35. And
The air that has passed through the outside air filter 35 is guided to the rear side of the outside air passage 33 along the partition plate 32, and is introduced into the air mixing chamber 39 behind the outside air filter 35. Then, the heat exchange air from the heat exchanger 37 and the non-heat-exchanged outside air from the outside air filter 35 are mixed in the air mixing chamber 39.

At this time, since the outside air that has passed through the outside air filter 35 is blocked from the heat exchanger 37 by the partition plate 32, it does not affect the heat exchanger 37 thermally. Therefore, immediately after the operation of the booth air conditioner is started, the room air inside the booth passing through the heat exchanger 37 has the same temperature as the outside air outside the booth, and for example, during the cooling in the summer, hot air is slightly blown. Although it passes through the heat exchanger 37, only the cold air circulating in the booth then passes through the heat exchanger 37, and the heat exchanger 37 is not overloaded. Then, the mixed air obtained as described above has an approximately intermediate temperature between the temperature of the heat exchange air and the temperature of the outside air, and after mixing both the indoor air inside the booth and the outside air outside the booth, the heat exchanger. As a result, the temperature becomes similar to that of the conventional example in which the liquid is passed through.

On the other hand, when the pressurizing fan 46 is driven, the pressurizing fan 46 causes the mixed air of the room air inside the booth and the outside air outside the booth mixed in the air mixing chamber 39 as described above to flow into the first blowing chamber. The air is sucked into 42 and blown out into the second blowing chamber 45. The mixed air blown into the second blowout chamber 45 is guided downward along the lower surface of the partition plate 43 that is inclined downward and is introduced into the booth. Thereafter, the same operation as described above is repeated to air-condition the inside of the booth.

As described above, in the booth air conditioner of the above-described embodiment, the inside air duct for guiding the outside air from the outside air fan 53 and the indoor air from the circulation fan 57 in the casing 9 is provided. 34 is cut off by a partition plate 32, an outside air filter 35 is arranged and fixed in the outside air passage 33, and a circulation filter 36 is arranged and fixed in the indoor air passage 34 so as to remove dust in the air. The device 37 is arranged and fixed on the rear side of the circulation filter 36 of the indoor air duct 34 so that only the indoor air flowing through the indoor air duct 34 is heat-exchanged, and the outdoor air duct 33 and the indoor air duct An air mixing chamber 39 that mixes the outside air from the outside air passage 33 and the heat exchange air from the indoor air passage 34 is provided downstream of the passage 34, and the mixed air in the air mixing chamber 39 is pressurized by a pressurizing fan 46. By In which was to be introduced into the over nest.

Therefore, in the above embodiment, the heat exchanger 37
The air passing through is only the indoor air that has already undergone heat exchange inside the booth, and the outside air outside the booth does not pass through the heat exchanger 37. Therefore, especially during cooling in the summer, the heat exchanger 37 is overheated. The external air, which is a high-temperature hot air that imposes a heavy load, is mixed with the heat exchange air in the air mixing chamber 39 located downstream of the heat exchanger 37 without passing through the heat exchanger 37, and therefore is applied to the heat exchanger 37. The load is reduced, the life of the heat exchanger 37 can be extended, the heat exchange efficiency can be improved, and the cooling capacity can be improved.

By the way, the outside air passage 33 and the indoor air passage 34 of the above embodiment are provided so as to be blocked by the partition plate 32, but when the present invention is carried out, it is not limited to this. Instead, the outside air outside the booth and the indoor air inside the booth may be guided in a state where they are separately blocked, and finally, the air mixing chamber 39 may be mixed so as to function. For example, it is possible to form the outside air air passage 33 and the indoor air air passage 34 by attaching a cylindrical object that extends in the left-right direction and opens rearward to the communication port 54 and the air outlet of the circulation fan 57. Further, the air mixing chamber 39 may be configured by a case-like object that mixes the outside air from the outside air passage 33 and the indoor air from the inside air passage 34 downstream of the outside air passage 33 and the inside air passage 34. Good. However, when the partition plate 32 is used to block the outside air passage 33 and the indoor air passage 34, and a space is provided between the rear end circle of the partition plate 32 and the shield wall 10, the air mixing chamber 39 is provided. When it is implemented as a configuration for forming the above, there is an effect that the entire configuration is simple and the cost can be reduced.

Further, in the above-mentioned embodiment, in order to introduce the outside air from the outside air fan 53 into the outside air passage 33, the first intake chamber 5
Although the zero and second intake chambers 52 are provided, the outside air fan 53 may be provided in a single intake chamber to blow the outside air directly to the outside air passage 33. Similarly, in order to introduce indoor air from the circulation fan 57 to the indoor air duct 34, the circulation fan 57 is arranged in a single circulation chamber without providing the first circulation chamber 55 and the second circulation chamber 56. Then, the room air may be blown directly to the room air passage 34. Similarly, the pressure fan 4
In order to introduce the mixed air into the booth from No. 6, without providing the first blowing chamber 42 and the second blowing chamber 45, the pressurizing fan 46 is arranged in a single blowing chamber, and the mixed air is directly fed to the booth. May be blown. Alternatively, the intake port 48 can be provided at a position other than the outer wall 4 of the casing 9.

[0029]

As described above, the booth air conditioner of the present invention has, in the casing, the outside air passage for guiding the outside air from the outside air fan and the indoor air passage for guiding the inside air from the circulation fan. It is provided so as to be cut off, and a heat exchanger is arranged on the indoor air air passage so as to exchange heat only with the indoor air flowing through the indoor air air passage, and downstream of the outside air air passage and the indoor air air passage, An air mixing chamber for mixing the outside air from the outside air passage and the heat exchange air from the indoor air passage is provided, and the mixed air in the air mixing chamber is introduced into the booth by a pressurizing fan. is there. Therefore, the air that passes through the heat exchanger is only the indoor air that has already undergone heat exchange inside the booth, and the outside air outside the booth does not pass through the heat exchanger.Therefore, especially during cooling in summer, heat exchange is performed. The external air, which is a hot air that overloads the heat exchanger, does not pass through the heat exchanger and is mixed with the heat exchange air in the air mixing chamber downstream of the heat exchanger. Is reduced, the life of the heat exchanger can be extended, the heat exchange efficiency can be improved, and the cooling capacity can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing the appearance of a booth air conditioner according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an internal configuration of a booth air conditioner according to an embodiment of the present invention.

FIG. 3 is a front sectional view of a booth air conditioner according to an embodiment of the present invention.

FIG. 4 is a right side sectional view of a booth air conditioner according to an embodiment of the present invention.

FIG. 5 is a sectional view of a left side surface of a booth air conditioner according to an embodiment of the present invention.

FIG. 6 is a plan sectional view of a booth air conditioner according to an embodiment of the present invention.

[Explanation of symbols]

 9 Casing 33 Outside air wind passage 34 Indoor air wind passage 37 Heat exchanger 39 Air mixing chamber 46 Pressurizing fan 53 Outside air fan 57 Circulation fan

Claims (1)

[Claims] 1. A casing mounted on a roof of a booth, an outside air fan for introducing outside air outside the booth into the casing, and an outside air provided inside the casing for guiding outside air from the outside air fan. An air duct, a circulation fan for introducing the indoor air in the booth into the casing, and a casing provided in the casing to block the outside air duct,
An indoor air duct for guiding the indoor air from the circulation fan; a heat exchanger arranged on the indoor air duct for exchanging heat between the indoor air flowing through the indoor air duct; the outside air duct and the room It is installed downstream of the air duct,
An air mixing chamber for mixing the outside air from the outside air passage and the heat exchange air from the indoor air passage, and a pressurizing fan for introducing the mixed air in the air mixing chamber into the booth. Air conditioner for booth.