JPH0224056Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is an air conditioner, more specifically, a casing having an air outlet, a rotor, and a rotor that covers the outer periphery of the rotor in a spiral shape and has a distance from the center of rotation of the rotor. A Sirotskov fan is equipped with a fan housing comprising a peripheral wall where the temperature changes, a pair of side walls, and a differential user section on the outlet side, and heat exchange between the outlet side of the fan and the air outlet. The present invention relates to an air conditioner in which a container is arranged.

(Prior Art) Conventionally, as described in, for example, Japanese Utility Model Application Publication No. 56-96216, and as shown in FIG. The fan housing 5 is formed into an inner hollow shape by a peripheral wall 6 that spirally covers the outer periphery of the rotor 4 and whose distance from the rotation center of the rotor 4 changes, and a pair of side walls 7, 7. However, an air conditioner is known in which a Sirotskov fan 3 is provided with a differential user section 8 on the outlet side, and a heat exchanger 2 is disposed on the suction side of the fan 3.

The cross-sectional shape of the differential user portion 8 of the Shirotsuko fan 3 is a rectangular shape in which the width (passage width) of the radially outer portion and the inner portion are equal.

On the other hand, a ceiling-suspended air conditioner having a configuration similar to the above-mentioned air conditioner will be described with reference to FIG. In other words, a heat exchanger 2 is disposed on the blowing side of the Sirotskov fan 3, and the air in the air-conditioned room is sucked in by the rotational drive of the Sirotskov fan and blown and supplied to the heat exchanger 2. 2, the air was exchanged with heat and the conditioned air was blown out from the outlet 1a.

(Problems to be Solved by the Invention) However, in the above-mentioned air conditioner, since the cross section of the differential user part 8 of the above-mentioned Sirotsukofan 3 was square, the following problems occurred.

That is, in the Sirotskov fan 3, the opening of the differential user part 8 provided on the outlet side of the fan housing 5 has a rectangular cross section as described above, and this opening is generally smaller in size than the heat exchanger 2. Therefore, when disposing the Sirotskov fan 3 in the casing 1, the differential user part 8 of the Sirotskov fan 3 is placed in the heat exchanger 2 in order to downsize the casing 1.
If the air is blown out from the differential user section 8 as the rotor 4 rotates, it will only flow through a part of the heat exchanger 2. The flow area of the air flowing through the heat exchanger 2 is small, and the thermal efficiency of the heat exchanger 2 becomes poor.

Further, the differential user section 8 has a rectangular cross section, and the width of the passage inside and outside the differential user section 8 in the radial direction is the same. When air is blown out from the heat exchanger 2, the wind speed on the radially outward side of the differential user section 8 is high, and the wind speed on the radially inward side is small.
The wind speed of the air flowing through the heat exchanger 2 differs in each part of the heat exchanger 2, and uniform and good heat exchange cannot be expected, and the distribution of the blown air also becomes poor.

On the other hand, in order to solve the problem that the contact area of circulating air in the heat exchanger 2 is small,
The Sirotskov fan 3 may be placed apart from the heat exchanger 2 to ensure a sufficient distance between the differential user section 8 and the heat exchanger 2, but in this case, the casing of the air conditioner 3
This leads to the negative effects of the larger size of the structure.

The purpose of the present invention is to increase the contact area of the circulating air in the heat exchanger without increasing the size of the air conditioner, to effectively utilize the heat exchanger to improve the refrigerating capacity, and to The point is to make the air distribution uniform.

(Means for Solving the Problems) To explain the configuration of the present invention based on FIGS. 1 to 3, a rotor 4 is attached to a casing 1 having an air outlet 1a
and a fan housing 5 in which the rotor 4 is housed, and a heat exchanger 2 is disposed between the outlet side of the fan 3 and the air outlet 1a. The fan housing 5 is connected to a peripheral wall 6 that covers the outer periphery of the rotor 4.
The air outlet 1a is connected to one end of the peripheral wall 6.
a ceiling wall 6a that extends toward the side and whose distance from the rotation center of the rotor 4 increases toward the exit side;
and the air outlet 1 continuous to the other end side of the peripheral wall 6.
a bottom wall 6b extending in the direction a and facing the top wall 6a;
It is composed of a pair of side walls 7, 7, and the ceiling wall 6a
A differential user section 8 is formed by the bottom wall 6b and the free end portions of the side walls 7, 7, while the width of the top wall 6a is gradually changed from the continuous portion with the peripheral wall 6 toward the tip end on the outlet side. In addition to making the width wider, the bottom wall 6b
has the same width as the peripheral wall 6, and the free ends of the side walls 7 forming the differential user section 8 are inclined walls, so that the cross-sectional shape of the differential user section 8 is shaped like an inverted table. It was made into a shape.

(Function) As the rotor 4 is driven to rotate, air is blown into the 8-shell heat exchanger 2 of the differential user section. As a result, the blown air is blown out more widely than in the conventional case due to the slope of the side walls 7, 7. As a result, when the Sirotskov fan 3 and the heat exchanger 2 are arranged at the same spacing as in the conventional case, the air blown from the differential user section 8 can be made to flow over a wider area of the heat exchanger 2. At the same time, the width of the top wall 6a located at the radially outer part of the differential user part 8 where the blown air is further accelerated is gradually increased toward the outlet side tip with respect to the continuous part with the peripheral wall 6. Therefore, the blowing air flow on the ceiling wall 6a side is decelerated, and the blowing air is blown out to the heat exchanger 2 at a uniform wind speed.

(Example) The air conditioner according to the present invention will be described below with reference to the embodiments shown in the drawings.

In Fig. 2, reference numeral 1 denotes a casing having an elongated rectangular shape, and a blowout port 1a is formed on one side in the length direction of the casing 1, and a suction port 1b is formed at a lower position on the opposite side to the blowout port 1a. At the same time, inside the casing 1, a heat exchanger 2 is arranged in a forward-slanted manner on the side of the air outlet 1a, while a Shirotsuko fan 3 is arranged on the side of the air inlet 1b of the heat exchanger 2.

The Sirotskov fan 3 is formed from a rotor 4 and a fan housing 5 that houses the rotor 4. The fan housing 5 includes a peripheral wall 6 that covers the outer periphery of the rotor 4, and a peripheral wall 6 that is continuous with one end of the peripheral wall 6. a top wall 6a that extends toward the air outlet 1a and whose distance from the center of rotation of the rotor 4 increases toward the outlet; Extending, the ceiling wall 6a
The top wall 6a, the bottom wall 6b and the side walls 7,
A differential user section 8 is formed by the free end section 7.

As the rotor 4 is driven to rotate, air in the air-conditioned room is sucked into the fan housing 5 from the suction port 1b of the casing 1 through the suction port 7a provided on the side wall 7 of the Sirotsko fan 3. The air is pressurized in the housing 5 and blown out from the differential user part 8 toward the heat exchanger 2, and heat is exchanged when passing through the heat exchanger 2, so that the conditioned air is supplied from the outlet 1a of the casing 1. It's like it's blowing out into the room.

Furthermore, the width of the top wall 6a is made wider in a continuous portion with the peripheral wall 6 toward the tip end on the outlet side, and the width of the bottom wall 6b is made the same width as the peripheral wall 6, and The free end portions of the side walls 7, 7 forming the differential user portion 8 are formed as inclined walls, and the cross-sectional shape of the differential user portion 8 is made into an inverted trapezoidal shape.

Specifically, as shown in detail in FIG. 1, one top wall 6a of the peripheral wall 6 is formed so as to gradually expand in diameter outward in the radial direction around the rotation center of the rotor 4, and this top wall 6a is formed to gradually become wider toward the tip end on the outlet side, and the bottom wall 6b of the peripheral wall 6
The top and bottom walls 6a and 6b are made to have a width that is almost the same as the width of the top wall and extend to the tip end on the outlet side, and both ends of the top wall and the bottom wall 6a and 6b are closed with the side walls 7, so that the top wall and the bottom wall 6
In the interior surrounded by a, 6b and each side wall 7, the differential user section 8 is formed, which has an inverted trapezoidal cross section and whose opening area gradually increases toward the tip end on the exit side.

In this manner, the air pressurized within the fan housing 5 as the rotor 4 is driven to rotate is blown out from the inverted trapezoidal opening 8a of the differential user section 8, thereby improving the heat exchanger 2. This increases the air circulation area for the heat exchanger 2 to increase the thermal efficiency (heat radiation or heat absorption efficiency). By increasing the width of the passage in the radially outer part relative to the side part, the wind velocity of the air blown out from the opening 8a of the differential user part 8 is made uniform in each part, and the heat exchanger 2 is provided with a uniform wind velocity. It was designed to allow air to circulate for good heat exchange.

The differential user portion 8 has an opening area gradually increasing in a smooth continuous manner as it approaches the outlet end of the fan housing 5. When only the opening area of the diffuser section 8 is suddenly expanded in a step-like manner, turbulence (vortex) is generated in the differential user section 8 as the rotor 4 rotates, and the rotational resistance of the rotor 4 increases. Pressure loss occurs and the fan performance deteriorates, but as mentioned above, by gradually increasing the opening area of the differential user section 8 in a smooth continuous manner toward the tip end on the outlet side, the opening of the differential user section 8 can be reduced. This prevents the occurrence of turbulent flow (turbulent flow) due to the expansion of the area, thereby suppressing the deterioration of fan performance.

Further, as shown in FIG. 4, it is also possible to install a plurality of the Shirotsukou fans 3 in parallel in the casing 1. In this case, the differential user section 8 of the fan housing 5 of each Shirotsukou fan 3 can be installed in an inverted position. Due to this shape, sufficient suction space can be secured between the mutually adjacent side walls 7 of each fan housing 5, and the suction ports 7a of each side wall 7 can be secured without increasing suction resistance.
Therefore, air can be sucked into each fan housing 5 in a good manner.

The embodiment of the present invention is constructed as described above, and the fan housing 5 of the Sirotskov fan 3 is
Air from the air-conditioned room is sucked into the casing 1 through the suction port 1b of the casing 1 by the rotation of the rotor 4 provided therein, and this air flows through the suction port 7a formed in the side wall 7 of the fan housing 5 into the fan housing. 5 , is pressurized within the fan housing 5 as the rotor 4 rotates, and is blown out from the differential user section 8 of the fan housing 5 to the heat exchanger 2 .

Therefore, the differential user part 8 is formed in an inverted trapezoidal shape so that the opening area gradually increases as it approaches the tip opening 8a. As shown in FIG. 3, the flow area of the blown air to the heat exchanger 2 is increased corresponding to the increase in the opening area of the opening, and the air flows through the heat exchanger 2.
In addition, by making the differential user section 8 into an inverted trapezoidal shape, air is blown out from the differential user section 8 at a uniform air velocity to each part, and the air is blown out to the heat exchanger 2 at a uniform air velocity. air is supplied, and the heat exchanger 2 efficiently exchanges heat. Incidentally, as the flow velocity of the air blown out from the radially outward portion of the differential user section 8 is reduced, the heat transmission coefficient in the heat exchanger 2 is slightly reduced, but this causes the heat exchange Compared to the decrease in thermal efficiency in the heat exchanger 2, the improvement in thermal efficiency due to the increase in the contact area of the circulating air in the heat exchanger 2 is greater, and the overall thermal efficiency is improved.

(Effect of the invention) As explained above, in the air conditioner according to the invention, the fan housing 5 is connected to the rotor 4.
a peripheral wall 6 that covers the outer periphery of the peripheral wall 6; a ceiling wall 6a that extends continuously from one end of the peripheral wall 6 toward the air outlet 1a and whose distance from the rotation center of the rotor 4 increases toward the outlet side; It consists of a bottom wall 6b that extends to the air outlet 1a continuously from the other end of the peripheral wall 6 and faces the top wall 6a, and a pair of side walls 7, 7, the top wall 6a and the bottom wall 6b. and the free end portions of the side walls 7, 7 form a differential user portion 8, while the width of the top wall 6a is gradually increased toward the tip end on the outlet side with respect to the continuous portion with the peripheral wall 6. , the width of the bottom wall 6b is the same as that of the peripheral wall 6, and the free end portions of the side walls 7, 7 forming the differential user portion 8 are sloped walls, so that the cross section of the differential user portion 8 is Since the shape is an inverted trapezoid, even if the Sirotskov fan 3 and the heat exchanger 2 are arranged at the same spacing as in the conventional case, in other words, even if the casing 1 is not enlarged, the distance from the differential user part 8 of the Sirotskov fan 3 can be reduced. The flow area of the blown air to the heat exchanger 2 can be increased, and the thermal efficiency of the heat exchanger 2 can be increased. In other words, while increasing the thermal efficiency of the heat exchanger 2, the casing can be made smaller, and the casing can be made smaller. This makes it possible to reduce the size and weight of the air conditioner, and by forming the cross-sectional shape of the differential user section 8 into an inverted trapezoidal shape, the differential user section 8 can be made smaller and lighter, and the cross-sectional shape of the differential user section 8 is formed into an inverted trapezoidal shape. By increasing the width of the top wall 6a, where the wind speed is high, compared to the bottom wall 6b, the wind speed of the air blown from the differential user section 8 is reduced by the top wall 6a.
a and the bottom wall 6b, and the air at a uniform wind speed can be supplied from the differential user section 8 to the heat exchanger 2, and the heat exchanger 2 can provide a uniform and good heat exchanger. Furthermore, it is possible to improve the blown air distribution.

[Brief explanation of the drawing]

Fig. 1 is a slope view of a Shirodskov fan for an air conditioner according to the present invention, Fig. 2 is a side sectional view of an air conditioner to which the Shirodskov fan is applied, and Fig. 3 is a slope diagram illustrating the operating state of the Shirodskov fan on a heat exchanger. FIG. 4 is a plan view showing an embodiment in which Sirotskov fans are used in parallel, and FIG. 5 is a drawing showing a conventional example. DESCRIPTION OF SYMBOLS 1... Casing, 1a... Outlet, 2... Heat exchanger, 4... Rotor, 5... Fan housing, 6... Peripheral wall, 6a... Top wall, 6b... Bottom wall,
7...Side wall, 8...Diff user section, 8a...
Aperture.

Claims (1)

[Scope of utility model registration request] A Sirotskov fan 3 having a rotor 4 and a fan housing 5 housing the rotor 4 is installed in a casing 1 having an air outlet 1a, and a heat exchanger 2 is installed between the outlet side of the fan 3 and the air outlet 1a. In the air conditioner, the fan housing 5 is continuous with a peripheral wall 6 that covers the outer periphery of the rotor 4 and one end of the peripheral wall 6 and extends toward the air outlet 1a side. a ceiling wall 6a whose distance from the rotation center increases toward the exit side;
It consists of a bottom wall 6b that extends to the air outlet 1a continuously from the other end of the peripheral wall 6 and faces the top wall 6a, and a pair of side walls 7, 7, the top wall 6a and the bottom wall 6b. and the free end portions of the side walls 7, 7 form a differential user portion 8, while the width of the top wall 6a is gradually increased toward the tip end on the outlet side with respect to the continuous portion with the peripheral wall 6. , the width of the bottom wall 6b is the same as that of the peripheral wall 6, and the free end portions of the side walls 7, 7 forming the differential user portion 8 are sloped walls, so that the cross section of the differential user portion 8 is An air conditioner characterized by having an inverted trapezoidal shape.