JPH0712824U - Air conditioner - Google Patents

Abstract

(57) [Summary] [Configuration] The pre-filters 32 and 48 are provided in the ventilation passages that connect the return air fan 34 and the air supply fan 54 to the return air port 30, the exhaust port 40, the air supply port 74, and the outside air port, respectively.
Total heat exchanger 38, main filter 60, cooling coil 6
2. Air conditioners such as the heating coil 64 and the humidifier 66 are arranged. Therefore, the noise generated in the return air fan 34 and the air supply fan 54 is absorbed by these air conditioners, and the noise transmitted to the room is reduced. [Effect] Noise can be reduced. Further, since it is not necessary to provide a muffling device, it is inexpensive and a large heat exchange coil with a small air pressure loss can be used.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an air conditioner, and more particularly to an air conditioner such as an air handling unit or a packaged air conditioner having an exhaust heat recovery function and an outside air cooling function.

[0002]

[Prior art]

 A conventional air conditioner of this type has been disclosed in Jikken No. 3-1707 filed on January 18, 1991 and Jpn. No. 3-15939 filed on April 5, 1991. Has been done.

[0003]

[Problems to be solved by the device]

 In all of the conventional technologies, the air supply fan and the return air fan, which are noise sources, are installed near the air supply port and the return air port, so in order to reduce the noise transmitted to the room, the upper part of the casing is used. There is a problem in that it is necessary to provide a muffling device and the cost is high.

Further, since the installation space of the heat exchange coil is narrow, the installed heat exchange coil has a high surface wind velocity and a large number of rows. Therefore, since the air pressure loss due to the heat exchange coil is large, it is necessary to increase the blowing power, which causes a problem that the noise of the fan becomes large. Therefore, the main object of this invention is to provide an air conditioner that is inexpensive and has low noise.

[0005]

[Means for Solving the Problems]

 The present invention is directed to a casing, a return air which is formed in an upper portion of the casing, a return air port, an outside air outlet, an exhaust port, and an air supply port, each of which is provided in a lower portion of the casing and which inhales the return air from the return air port. A fan, an air supply fan that sends out air supply from the air supply port, a pre-filter provided in the first ventilation passage that connects the return air port and the return air fan, and a first filter that connects the exhaust port and the return air fan. The total heat exchanger provided over the second ventilation passage, the third ventilation passage that communicates the outside air inlet and the air supply fan, and the fourth heat exchanger that communicates the air inlet and the air supply fan. An air conditioner that includes a main filter and a heat exchange coil provided in a ventilation path.

[0006]

[Action]

 The noise generated by the return air fan and the supply air fan is absorbed by the air conditioners such as the pre-filter, total heat exchanger, main filter and heat exchange coil, and the long ventilation passage. It can be significantly attenuated by the time it leaves the mouth and air supply. Also, as with the total heat exchanger that requires a large installation space, the space for the main filter and heat exchange coil installed above can be expanded.

[0007]

[Effect of device]

 According to this invention, since it is not necessary to provide a muffling device, it is inexpensive. Moreover, since the installation space of the heat exchange coil can be expanded, a large heat exchange coil with a small air pressure loss can be used, and therefore, the blast power can be reduced and the noise can be reduced. The above-mentioned objects, other objects, features and advantages of the present invention will be more apparent from the following detailed description of the embodiments with reference to the drawings.

[0008]

【Example】

 1 to 5, the air conditioner 10 of this embodiment includes a casing 11. Inside the casing 11, due to the partition walls 12a to 12f and the drain pan 14, the first chamber 16, the second chamber 18, the third chamber 20, the fourth chamber 22, the fifth chamber 24, the sixth chamber 26 and the seventh chamber 26 are provided. The chambers 28 are formed at the positions shown in the figures. Then, the adjacent chambers are communicated with each other through the openings 19a to 19h formed in the partition walls 12a to 12f, whereby a predetermined ventilation passage is formed in the casing 11. A heat insulating material (not shown) is formed on the inner surface of the casing 11 and the surfaces of the partition walls 12a to 12f.

A return air port 30 is formed on the upper surface of the first chamber 16 (FIGS. 1 and 5), a pre-filter 32 is arranged in the center of the first chamber 16, and a lower portion of the first chamber 16 is further provided. A return air fan 34 and a motor 36 for driving the return air fan 34 are arranged. The discharge port of the return air fan 34 is connected to the opening 19 a that connects the first chamber 16 and the second chamber 18. As can be seen from FIG. 3, a total heat exchanger 38 penetrating the partition wall 12c is arranged in each of the second chamber 18 and the fifth chamber 24. An exhaust port 40 is formed on the upper surface of the third chamber 20 (FIG. 5), and an exhaust damper for adjusting the passing air volume is provided in each of the openings 19b and 19c that connect the third chamber 20 and the second chamber 18. 42 and 44 are attached. An outside air port 46 is formed on the upper surface of the fourth chamber 22 (FIG. 1), and a prefilter 48 is horizontally arranged at the center of the fourth chamber 22 to connect the fourth chamber 22 and the fifth chamber 24. Outside air dampers 50 and 52 are attached to the openings 19d and 19e, respectively. An air supply fan 54 and a motor 56 for driving the air supply fan 54 are arranged in the fifth chamber 24 (FIGS. 1 and 5), and the discharge port of the air supply fan 54 includes the fifth chamber 24 and the sixth chamber 26. It is connected to the communicating opening 19g. Further, a return air damper 58 is attached to the opening 19f that connects the fifth chamber 24 and the second chamber 18 with each other. The main filter 60, the cooling coil 62, the heating coil 64, and the humidifier 66 are arranged in this order from the upstream side in the opening 19h that connects the sixth chamber 26 and the seventh chamber 28. Motor valves 68 and 70 are attached to the cooling coil 62 and the heating coil 64, respectively, and a solenoid valve 72 is attached to the humidifier 66 (FIG. 3). An air supply port 74 is formed on the upper surface of the seventh chamber 28. When the air conditioner 10 is used, the return air port 30 and the air supply port 74 are communicated with the room through a duct (not shown), and the exhaust port 40 and the outside air port 46 are outdoors with a duct (not shown). Communicated.

In operation, when the heating operation is executed, the electric valve 68 of the cooling coil 62 is closed and the electric valve 70 of the heating coil 64 is opened. Further, the solenoid valve 72 of the humidifier 66 is opened if necessary. Then, the return air fan 34 and the air supply fan 54 are driven by the motors 36 and 56. Then, the return air from the room to be air-conditioned is taken into the first room 16 of the air conditioner 10 through the return air port 30. The return air taken into the first chamber 16 is dusted through the pre-filter 32 and then sent to the second chamber 18 through the return air fan 34. Part of the return air sent to the second chamber 18 is sent to the fifth chamber 24 through the return air damper 58, and the rest is exhausted from the exhaust port 40 through the exhaust damper 44 or the total heat exchanger 38 and the damper 42. To be done.

Further, the outside air from the outside is taken into the fourth chamber 22 through the outside air port 46. The outside air taken into the fourth chamber 22 is dusted through the pre-filter 48, is then sent to the fifth chamber 24 through the outside air damper 52 or the outside air damper 50 and the total heat exchanger 38, and flows in through the return air damper 58. Mixed with return air. At this time, the outside air passed through the total heat exchanger 38 undergoes total heat exchange with the exhaust gas, whereby exhaust heat is recovered. The mixture of the outside air and the return air (air supply) is sent to the sixth chamber 26 through the air supply fan 54. Then, the dust is further removed by the main filter 60, heated by the heating coil 64, humidified by the humidifier 66 as necessary, and then supplied into the room through the duct (not shown) from the air supply port 74.

Similarly, when the cooling operation is executed, the supply air cooled to the predetermined temperature can be supplied to the room to be air-conditioned. However, during the cooling operation, the electric valve 68 of the cooling coil 62 is opened and the electric valve 70 of the heating coil 64 is closed. According to this embodiment, the air passage connecting the return air port 30 and the return air fan 34 and the air passage connecting the air supply port 74 and the air supply fan 54 are long, and a muffling effect is exerted on these air passages. The expected pre-filter 32 and the heat exchange coil (cooling coil 62 and heating coil 64), etc. are arranged, and a heat insulating material (not shown) that can expect a sound deadening effect is provided on the inner surface of the casing 11 and the surfaces of the partition walls 12a to 12f. Since it is formed, the noise transmitted to the room can be greatly reduced.

Also, like the total heat exchanger that requires a large installation space, since it is installed on the upper part, it is possible to use a large-sized heat exchange coil and a main filter, and therefore, air pressure loss is reduced and blast power is reduced. Therefore, the generated noise can be reduced. Although the cooling coil 62, the heating coil 64, and the like are arranged vertically in the above-described embodiment, if they are arranged obliquely, as shown in FIG. 6, the entire air conditioner 10 becomes more compact. Can be formed.

Further, in the above-described embodiment, the air supply port 74 is formed on the upper surface of the seventh chamber 28, that is, on the left end of the upper surface of the casing 11. However, the air supply port 74 may be formed, for example, as shown in FIGS. As shown in FIG. 8, it may be formed on the upper surface of the sixth chamber 26, that is, on the central portion of the upper surface of the casing 11. In this case, the discharge port of the air supply fan 54 is connected to the opening 19i that connects the fifth chamber 24 and the seventh chamber 28, and the opening 19h is connected to the main side in this order from the upstream side, that is, the seventh chamber 28 side. A filter 60, a cooling coil 62, a heating coil 64 and a humidifier 66 are arranged.

[Brief description of drawings]

FIG. 1 is an illustrative view showing one embodiment of the present invention.

FIG. 2 is a plan view of the embodiment shown in FIG.

3 is a sectional view taken along line III-III in FIG.

4 is a sectional view taken along line IV-IV in FIG.

5 is a sectional view taken along line VV in FIG.

FIG. 6 is an illustrative view showing a state in which a cooling coil, a heating coil and the like are obliquely provided in the embodiment of FIG.

FIG. 7 is an illustrative view showing a state in which an air supply port is formed in the central portion of the upper surface of the casing in the embodiment of FIG.

FIG. 8 is a plan view of the embodiment shown in FIG.

[Explanation of symbols]

 10 ... Air conditioner 11 ... Casing 12a-12f ... Partition wall 30 ... Return air port 32, 48 ... Pre-filter 34 ... Return air fan 38 ... Total heat exchanger 40 ... Exhaust port 46 ... Outside air port 54 ... Air supply fan 60 ... Main filter 62 ... Cooling coil 64 ... Heating coil 74 ... Air inlet

Claims (2)

[Scope of utility model registration request] 1. A casing, a return air port, an outside air port, an exhaust port, and an air supply port, each of which is formed in an upper portion of the casing, and return air is provided from the return air port, each of which is provided in a lower portion of the casing. A return air fan that draws in air, and a supply air fan that supplies supply air from the air supply port, a prefilter provided in a first ventilation path that connects the return air port and the return air fan, the exhaust port and the A second air passage communicating with the return air fan, a total heat exchanger provided across a third air passage communicating the outside air opening and the air supply fan, and the air supply opening An air conditioner comprising a main filter and a heat exchange coil provided in a fourth ventilation path that communicates with the air supply fan. 2. The air conditioner according to claim 1, wherein the main filter and the heat exchange coil are obliquely arranged.