JPH0240410Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to an indoor unit for duct air conditioning that is mainly installed indoors in a residence.

(Prior art) Conventionally, as shown in, for example, Japanese Utility Model Application Publication No. 10149/1983, a case constituting an air conditioner has a blow-off duct that runs along the ceiling of the room and a side wall of the same room. After connecting the indoor air with a suction duct, the blower housed in the case sucks the indoor air through the suction duct, and cools or heats it with the heat exchanger also housed in the case. A widely known technique is one in which the air is returned indoors through a blow-out duct.

(Problem to be solved by the invention) However, in the above air conditioner, one duct is used only for suction, and the other duct is used only for blowing out, so it depends on whether the cold air is hot air or not. It was not possible to change the flow of air in the room, and it was not always possible to perform efficient air conditioning control.

Therefore, in this invention, the purpose of this invention is to provide an air conditioning indoor unit that can perform efficient indoor air conditioning control by switching between the two connected ducts for air suction or air blowing as appropriate. There is.

(Means for solving the problem) The gist of this invention is that in an indoor air conditioning unit in which a heat exchanger and a blower are housed in a case, and two ducts are connected to the case, The inside of the case is divided into a suction side space and a blowout side space with the heat exchanger as a boundary, and the suction side space has two suction ports that communicate with each of the two ducts, and the blowout side space has two suction ports that communicate with each of the two ducts. two air outlets leading to each of the two air outlets are connected to each other, and the two air intake ports are provided with a suction side switching door for controlling opening and closing of the two air intake ports, and the two air outlet openings are connected to each other, and the two air outlet openings are connected to each other. A controlled blow-off side switching door is provided, and the blower is housed in the blow-off side space and connected to the two blow-off ports.

(Function) Therefore, each of the two ducts connected to the case has an inlet connected to the suction side space whose opening/closing is controlled by the suction side switching door, and an outlet side space whose opening/closing is controlled by the blowout side switching door. Since an air outlet connected to the duct will be provided, both ducts can be used for suction or blowing out air by operating the suction side switching door and the blowing side switching door, thus achieving the above purpose. It is something that can be done.

(Example) Hereinafter, an example of this invention will be described with reference to the drawings.

In Figures 1 to 5, air conditioning indoor unit 1
is attached to, for example, the back of the ceiling 4 of a house with screws or the like via a mounting bracket 3 provided in a case 2, and a cooling heat exchanger 5, a heating heat exchanger 6, and a blower 7 are installed in the case 2. It is constructed by storing. The entire case 2 is formed into a substantially rectangular shape, and one end of the cooling heat exchanger 5 is connected to an air inlet/outlet frame 8 provided on one surface of the case 2.
is located near the center of the surface, and the other end is located near the end of one adjacent surface formed following this one surface. Further, the heating heat exchanger 6 is arranged adjacent to and adjacent to the leeward side of the cooling heat exchanger 5. Therefore, these cooling heat exchangers 5
The interior of the case 2 is roughly divided into two by the heating heat exchanger 6 and the inner surface of the case 2 and the air inlet/outlet frame 8 on the windward and leeward sides of the heat exchangers 5 and 6, respectively.
A suction side space 9 and an outlet side space 10 surrounded by
is formed. The cooling heat exchanger 5 and the heating heat exchanger 6 are each formed into a rectangular shape, and are connected to refrigerant pipes 13 and 1 through refrigerant inlets and outlets 11 and 11 and hot water inlets and outlets 12 and 12 provided on one side of the case 2, respectively.
3 and hot water pipes 14, 14 are pulled out and connected to a cold/hot heat source 15 provided outdoors.
Refrigerant or hot water is supplied from 5.

The air inlet/outlet frame 8 is formed with first and second duct connection parts 17a and 17b connected to the first and second ducts 16a and 16b on the outside of the case 2,
The inside of the case 2 is divided into two parts, one of which extends into the suction side space 9 so as to face the filter 18, and the other part extends into the outlet side space 10. The first and second ducts 16a and 16b are arranged vertically in parallel along the ceiling 4, and communicate with the interior of the room through a plurality of air inlet/outlet holes 19 formed on the side surfaces. A portion of the air inlet/outlet frame facing the suction side space 9 has first and second suction ports 20a, 20b connected to the suction side space 9, and a portion facing the blowout side space 10 has the blowout side space. First and second air outlets 21a and 21b connected to the duct 10 are formed respectively, and the first inlet 20a and the first air outlet 21a are connected to the first duct 16a, and the second inlet 20b and the second air outlet 21a are connected to the first duct 16a. The air outlet ports 21b each communicate with the second duct 16b. In addition, the first and second suction ports 20
At the rear of a and 20b, there is a suction side switching door 22a,
A blowout switching door 22b is rotatably provided behind the first and second blowout ports 21a, 21b, and these switching doors 22a, 22b allow the first
and second suction ports 20a, 20b and first and second
The air outlets 21a and 21b are selectively controlled to open and close. The suction side switching door 22a and the blowing side switching door 22b are operated by the motor actuator 2 in conjunction with a cooling/heating switch (not shown).
3a, 23b, both switching doors 22 are driven by the motor actuators 23a, 23b.
a and 22b are rotated in conjunction with each other, so that when the suction port leading to one duct is closed by the suction side switching door 22a, the blowout port leading to the other duct is closed by the blowout side switching door 22b. It is becoming more and more like this.

Further, the tips of the first and second air outlets 21a and 21b gradually become tapered, and are connected to the air outlet duct portion 2 of the blower 7 via the air outlet side switching door 22b.
4b is connected. This air blower 7 is of the Shirotsuko type, which is constructed by storing a Shirotsuko fan 25 in a scroll-shaped fan storage case 24, and a motor 2 connected to the Shirotsuko fan 25.
6, air is sucked through the air inlet 24a formed on the side surface of the fan storage case 24, and the air is drawn into the air outlet duct 24 formed at the part with the largest diameter.
The air sucked in is pumped through b.

In the above configuration, if heating is selected by the cooling/heating switch (not shown), the second
When the suction port 20b of the air inlet 20b is closed and the first air outlet 21a is closed, and the blower 7 is driven in this state, as shown by the arrow, the first duct 16
a to the suction side space 9 via the first suction port 20a.
The indoor air is sucked in. Then, this sucked air is heated by passing through a cooling heat exchanger 5 (not in operation) and a heating heat exchanger 6 (hot water is supplied), and a blower 7 blows hot air into the air. the second duct 16b through the second outlet 21b
Forced inside. On the other hand, when cooling is selected, the first intake port 20a is closed and the second outlet 21b is closed, and air is sucked into the intake space 9 from the second duct 16b. , cooled by the cooling heat exchanger 5 in operation, and the blowout side space 10
From there, cold air is sent to the first duct 16a.

Therefore, it is possible to selectively provide each of the first and second ducts 16a, 16b with both the functions of suctioning and blowing out indoor air depending on the cooling or heating operation.

(Effects of the invention) As described above, according to this invention, the inside of the case constituting the indoor unit for air conditioning is divided into the suction side space and the blowout side space by a heat exchanger, and a heat exchanger is installed in the case on the suction side space. 2 leading to each of the two ducts
The two inlets are connected to the two outlets leading to each of the two ducts, and the opening and closing of the two inlets are controlled by the inlet side switching door, and the two outlet sides are controlled by the outlet side switching door.
Since the blower is connected to two air outlets, both ducts can be used for suction or blowing out air by operating the intake side switching door and the outlet side switching door, allowing efficient air conditioning control that matches the indoor environment. can be done. In addition, the intake side switching door and the outlet side switching door are independent, and the opening and closing of the inlet and outlet are controlled separately by these switching doors, so the shape of the inlet and outlet can be set as desired. It also has merits.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing an embodiment of this invention, Figure 2 is a sectional view showing an embodiment of this invention.
The figure is a sectional view taken along the line shown in Fig. 1, Fig. 3 is a sectional view taken along the line shown in Fig. 1, Fig. 4 is a perspective view of the air conditioning indoor unit in Fig. 1, and Fig. 5 is an installed state of the air conditioning indoor unit. FIG. 1... Air conditioning indoor unit, 2... Case, 5... Cooling heat exchanger, 6... Heating heat exchanger, 7... Air blower, 9... Suction side space, 10... Outlet side space,
16a, 16b... duct, 20a, 20b...
Inlet, 21a, 21b... Outlet, 22a...
Suction side switching door, 22b...Blowout side switching door.

Claims (1)

[Scope of utility model registration request] In an air conditioning indoor unit in which a heat exchanger and a blower are housed in a case and two ducts are connected to the case, the interior of the case is divided into an intake side space and an outlet side space with the heat exchanger as a boundary, Two inlets leading to each of the two ducts are connected to the suction side space, and two air outlets leading to each of the two ducts are connected to the outlet side space. A suction side switching door for controlling opening and closing of the suction port is provided, and a blowout side switching door for controlling opening and closing of the two blowout ports is provided at the two blowout ports, and the blower is housed in the blowout side space. An indoor unit for duct air conditioning characterized by being connected to two air outlets.