JPH02282635A - Air conditioner - Google Patents

Abstract

PURPOSE:To simplify the switching mechanism in the operation mode, reducing the parts required in number and cutting down the work steps in the assembly procedure, by providing a damper-switching device designed to switch by means of a set of dampers between passageways for outside air and discharged air to an all-purpose heat exchanger and passageways bypassing the all-purpose heat exchanger. CONSTITUTION:When the operation is in the mode for recovering the waste heat, a switching damper 7 takes a position (a); indoor air A1 drawn in by a return-air fan 1 is divided into air-for-discharge C1 and air for circulation by the opening-closing action of a return-air damper 2; after passing the return-air damper 2 the air for circulation is mixed with air-from-the-outdoors, D1, cleared of dust by a filter 3, undergoes heating against cooling by a cold-hot water coil 4, and is sent into the indoor space by an air-feed fan 5; both the air-for-discharge C1 and the air-from-the- outdoors D1 are drawn into an all-purpose heat exchanger 6 so that the heat is recovered from the air-for-discharge C1. When the operation is in the mode of outdoor- air cooling, the switching damper 7 takes a position (b); indoor air A1 is discharged directly without being passed through the all-purpose heat exchanger 6; air-from-the- outdoors D1 is conveyed directly to a filter 3 without being passed through the all- purpose heat exchanger 6.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an air conditioning source used in buildings, etc., and particularly relates to an air conditioner having an exhaust heat recovery function and an outside air cooling function.

2. Description of the Related Art In general, this type of air conditioner has a return air fan 1 that introduces blank air (return air) A2, as shown in FIGS. 5 and 6.
01, a return air damper 102 that allows outside circulation to pass through the introduced air, a filter 103 that removes dust from the air, a hot and cold water carp/l/104 that heats or cools the air, and the air (Maki). Air supply fan 10 that sends B2 into the room
5, and outside air D2 is taken in during exhaust heat recovery operation mode, and exhaust air C is
2, face dampers 107a and 107b that cool the entire surface of the total heat exchanger 106 in the outside air cooling operation mode, and outside air D2 and exhaust C.
2 and bypass dampers 108a and 108b that bypass the total heat exchanger 106.

In the case of the exhaust heat recovery operation mode with the above configuration, the indoor air (return air) A2 introduced by the return air fan 101 is exhausted by the opening/closing operation of the return air damper 102.
and the outside of the circulation, and the outside of the circulation is distributed to the return air damper 102.
After passing through and mixing with outside air D2, and having dust removed by a filter 103, it is heated and cooled by a hot and cold water carp/L/104, and then sent into the room by an air supply fan 105.

In addition, when taking in the outside air D2, the face damper 10
7a and 107b are opened and the bypass damper 108a is opened.

10th Close the door and transfer the exhaust gas C and outside air D2 to the total heat exchanger 106
The heat of the exhaust gas C2 is recovered.

Next, in the case of outside air cooling operation mode, the return air damper 102
is closed, the indoor air (return air) A2 is exhausted through a bypass damper 108a that bypasses the total heat exchanger 1oe,
In addition, outside air D2 is also introduced into the fill 103 through the bypass damper 1o8b. That is, face dampers 107a and 107b block air over the entire surface of the total heat exchanger 106.
id: closed, bypass dampers 108a and 108b are open.

Problems to be Solved by the Invention In such a conventional configuration, the seven-eighth damper 107a is used to switch the operation mode between exhaust heat recovery and outside air cooling.

1o7b and Baihasuda7 /< 108 a, 10
Since 8 b parts are required, the number of parts and assembly man-hours increases.
There were problems in that the manufacturing cost was high, a large storage space was required, the overall size of the air conditioner was increased, and the pressure loss when the air passed through it was also large.

The present invention solves these problems, and aims to provide a low-cost and compact air conditioner that facilitates operation mode switching, reduces the number of parts and assembly man-hours, and provides a low-cost and compact air conditioner.

Means for Solving the Problem In order to solve this problem, the present invention provides a return air fan for introducing indoor air, and a system that distributes the air introduced by the return air fan into the exhaust air and the return air. A return air damper, a supply air fan that mixes the air that has passed through the return air damper and outside air and supplies the mixture to the blank space, and a total heat exchanger for recovering exhaust heat, and the outside air is supplied to the total heat exchanger. and an air conditioner having a damper switching device that switches between an exhaust air path and an air path that bypasses the total heat exchanger using a set of dampers.

Effect With this configuration, when switching between exhaust heat recovery and outside air cooling operation mode, when the damper switching device is set to the total heat exchanger side, outside air and exhaust gas are guided to the total heat exchanger and the operation mode is switched to exhaust heat recovery operation mode.
When set to the bypass side, the entire surface of the total heat exchanger is blocked and the return air is directly exhausted, resulting in an outside air cooling operation mode.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 to 4.

As shown in the figure, 1 is a return air fan that introduces indoor air (return air) A1, and the introduced air is supplied to the indoor air B.
1, a return air damper 2, a filter 3 for removing dust from the air, and a supply fan 5 for supplying cold/hot water coil (v4) for heating and cooling the air and supply air B1 into the room are installed in sequence. ing. An air path from the return air fan 1 to the exhaust air C1 to the outside, and a supply air B1 for the outside air D1.
A total heat exchanger 6 is provided in an air mixture box 8 having an air passage for taking in the air, and the exhaust air C1 and the outside air D1 are separated by a partition plate 9. Furthermore, a damper switching device 7 is installed in the air-fuel mixture Bocknu 8, and the air path to the total heat exchanger 6 is switched by switching the damper.

According to the configuration described in 2 above, for example, in the case of the exhaust heat recovery operation mode, the damper switching device 7 is located at position (3), and the indoor air (return air) A1 introduced by the return air fan 1 is switched to the return air damper 2. It is divided into exhaust C1 and circulation part by opening and closing operation,
The circulating air passes through the return air damper 2 and mixes with outside air D1, and after removing dust by the filler 3, it is heated and cooled by the hot and cold water carp (v4) and sent into the room by the supply air 7 an 6. . In this case, the exhaust gas C and outside air D1 are introduced into the total heat exchanger e, so that the amount of heat of the exhaust gas C1 is recovered.

In addition, in the case of the outside air cooling operation mode, the damper switching device 7 is in the 0 position, so the indoor air (return air) A1 is directly exhausted without passing through the total heat exchanger 6, and the outside air D1 is also exhausted through the total heat exchanger 6. It is introduced directly into fill 3 without passing through 6. In other words, the damper switching device 7 cools the air path of the exhaust gas C and outside air D1 to the total heat exchanger 6.

Effects of the Invention As is clear from the above description of the embodiments, according to the present invention, by switching the position of the damper switching device, it is possible to easily switch between the exhaust heat recovery operation mode and the outside air cooling operation mode. This eliminates the need for a face damper and bypass damper compared to conventional models, reduces the number of parts and assembly man-hours, reduces the number of parts, and eliminates the need for storage space, making it more compact. It also has the effect of reducing pressure loss.

[Brief explanation of drawings]

FIG. 1 is a front view of an air conditioner according to an embodiment of the present invention, and FIG.
The figure is a left side view of the air conditioner, Figure 3 is a perspective view of the air conditioner's air mixture box during exhaust heat recovery operation, and Figure 4 is the air conditioner's air mixture box when it is in outside air cooling operation. FIG. 5 is a front view of a conventional air conditioner, and FIG. 6 is a left side view of the same air conditioner. 1... Return air fan, 2... Return air damper, 6... Supply air fan, 6... Total heat exchanger,
7...damper switching device, A1...return air, C1...exhaust air, Dl...outside air. Name of agent: Patent attorney Shigetaka Awano and 1 other person @1
Figure 5 Figure 1--1 to fan 2 =-1 breast A 'i' brim. 5-1 supply h fan g-11 all writings i to 7・-”〉Baro g device pigeon-i Mr.

Claims (1)

[Claims] a return fan for introducing indoor air; a return air damper for distributing the air introduced by the return air fan into exhaust air and return air; It is equipped with a supply air fan and a total heat exchanger for recovering exhaust heat, and a set of dampers is used to connect an air path for outside air and exhaust air to the total heat exchanger, and an air path that bypasses the total heat exchanger. An air conditioner equipped with a damper switching device that switches between