JPH0139774B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hot air dryer for washrooms, which is installed in a place where people wash their hands, such as a washroom, and dries wet hands with warm air. A conventional hot air dryer for a washroom consists of a heating section made of nichrome wire or the like and a blowing section made of a fan or the like. However, heating using a nichrome wire is inefficient and requires separate mechanisms for heating and blowing air, resulting in a large number of parts. On the other hand, the present inventor has disclosed the following patents:
In a series of subsequent inventions such as No. 57-55379,
A reduced pressure equilibrium heating method and a drying method or apparatus using the method were proposed.

The basic technology is to forcibly suck the air inside a sealed hollow chamber by the rotation of a rotating body and exhaust it to the outside, reducing the pressure in the room and balancing the pressure difference between the inside and outside. This equilibrium state is maintained, and the rotating action of the rotating body is continued while maintaining this equilibrium state to promote frictional action with the air to generate frictional heat, and this frictional heat heats the inside of the hollow chamber. This is a heating method that uses the rotating action of a rotating body to forcibly suck the air inside a sealed hollow chamber and exhaust it to the outside, reducing the pressure in the room and keeping the pressure difference between the inside and outside in a well-balanced state. At the same time, while maintaining this equilibrium state, the rotating action of the rotating body is continued to promote frictional action with the air and generate frictional heat, and this frictional heat heats the inside of the hollow chamber. This is a reduced pressure equilibrium heating method in which outside air is supplied by operation.

The present inventor also proposed a pressurized equilibrium heating method in JP-A No. 57-127779, in which if an exhaust port with a capacity lower than the exhaust capacity of the rotating body is provided in the exhaust, the intake gas is forced to be discharged to the outside. Therefore, it exhibits a kind of pressurizing effect, and is therefore accompanied by the generation of compression heat.
It was also discovered that the temperature could be raised more effectively and warm air could be obtained.

The inventor further disclosed in the patent application "Hot air method and apparatus" dated July 13, 1981 that the device has a gas suction port and a gas discharge port, and rotates with a gas suction capacity larger than the gas suction amount of the gas suction port. We proposed a method to create hot air in succession by sequentially connecting the gas outlet and gas inlet of each hollow body with an airtight structure having a rotating body. Further, in the same application, a plurality of rotating bodies having a gas inlet and a gas exhausting capacity larger than the gas inlet and the gas exhausting capacity of the gas inlet and the gas exhausting capacity of the gas inlet and the gas outlet, respectively, are arranged in a hollow body of an airtight structure having a gas inlet and a gas outlet. hollow body,
We proposed a method to create hot air by sequentially connecting the gas outlet and gas inlet of each hollow body. In both methods, even if the capacity of the other rotating bodies is lower than the capacity of the rotating body closest to the intake side, the hot air production capacity of the entire device is still higher than that of the rotating body with the same capacity. I also found that there was no difference. In addition, when three or more such hollow chambers are connected in succession, even if the capacity of the rotating bodies is lowered sequentially from the intake side, the hot air generation capacity of the entire device will be lower than when the capacities of all the rotating bodies are the same. I also found that there was no difference.

Based on these findings, it is an object of the present invention to provide a hot air dryer for washrooms that is efficient, consumes less power, and has a small number of parts.

That is, the present invention limits the amount of gas sucked into the gas inlet and/or the amount of gas discharged from the gas outlet to less than the gas suction and exhaust ability obtained by the rotation of the rotating body provided in the hollow body. Then, due to the retention effect of the intake gas based on the rotation within the rotation area of the rotating body and the constant pressure effect of depressurization or pressurization, the gas is heated by a friction phenomenon, etc., and this is obtained as hot air. This product provides a warm air dryer for washrooms.

The following is a first diagram showing a central cross section of an embodiment of the present invention.
The description will be made with reference to FIG. 2, which shows a central cross section of another embodiment.

1 is a hot air dryer for washrooms, and the hot air dryer for washrooms has an intake port 2 and an exhaust port 3. Reference numeral 4 is a hollow body having an airtight structure, and reference numeral 7 is a rotating body having a gas inlet 5 and a gas outlet 6, and is composed of rotating blades such as a propeller fan or a syringe fan. The rotary bodies 7 are rotatable by electric motors 8 installed in each of the hollow bodies 4 in a direction in which gas can be sucked in from the gas inlet 5 and gas can be discharged from the gas outlet 6. The gas outlet 6 has a larger opening area than the gas inlet 5. As shown in Fig. 1, in a washroom hot air dryer with one hollow chamber 4, the gas inlet of the hollow body 4 is connected to the air inlet of the washroom hot air dryer 1, and the gas exhaust port 6 is used for exhausting air. Connect to mouth 3. When connecting multiple hollow bodies as shown in Fig. 2, the gas exhaust port 6 and the gas inlet port 5 of each hollow body 4 are successively connected in a sealed state, and the gas exhaust of the hollow body on the most exhaust side is connected. The outlet 6 is connected to the exhaust port 3 of the warm air fan for the washroom, and the gas inlet 5 of the hollow chamber on the most intake side is connected to the intake port 2. g is a minute gap formed between the inner wall of the hollow body 4 and the rotating body 8, and R is the rotation area of the rotating body 7. Based on the gas suction capacity of the gas inlet 5 formed in each hollow body, the rotating body 7 installed in the corresponding hollow body
It is necessary to set the opening area of the gas suction port 5 so that the gas suction capacity during normal rotation is greater.

In this embodiment, the gas exhaust ports are further arranged such that the gas exhaust capacity during normal rotation of the rotating body 7 installed in the corresponding hollow body is greater than the gas exhaust capacity of the gas exhaust ports 6 formed in each hollow body. Set the opening area of 6.

In the embodiment shown in FIG. 2, the capacity of each rotating body 7 decreases from the intake port side to the exhaust port side, and the output of each electric motor 8 that rotates the rotating body 7 is It is about 1/2 that of a motor. In other words, the ratio of the output of each electric motor is approximately 3 to 4:2 from the intake port side to the exhaust port side.
It is 1.

Therefore, when the rotating body 7 is rotated by the electric motor 8,
The gas flows from the intake port 2 to the hollow body 4 via the gas intake port 5.
flow inside. At this time, since the opening area of the gas suction port 7 is limited to the gas suction capacity of the rotating body 7 installed in the corresponding hollow body 4, the rotating body 7
The amount of gas sucked in is smaller than the gas discharged by the rotating body 7, and the pressure in the rotation region R of the rotating body 7 is reduced compared to other parts, and the pressure in the hollow body as a whole is also reduced. The pressure difference between the rotation region R and other parts, and the pressure difference between the hollow body and the outside air gradually increases, but when a certain pressure difference is reached, the rotation region R
A nearly equilibrium state is reached in relation to the gas flowing into the vicinity, and this constant pressure state is maintained. The pressure difference between the inside and outside of the rotating region R in this equilibrium state and constant pressure state depends on the magnitude of the rotational suction and exhaust force of the rotating body 7, the size of the opening area of the gas inlet 5, the size of the minute gap g, etc. However, this equilibrium and constant pressure state is maintained as long as the rotating action of the rotating body 7 continues. In this equilibrium state, a phenomenon of air stagnation occurs in the rotational region R of the rotating body 7, and the frictional action continues repeatedly between the rotating body 7 and the accumulated gas, so that frictional heat is generated and the temperature gradually rises. The warm air heated by this frictional heat passes through a small gap g, is discharged from the gas discharge port 6 to the exhaust port 3, and is blown onto wet hands. If the opening area of the gas exhaust port 6 is set to a smaller exhaust capacity than the exhaust capacity of the rotating body 7, the gas sucked into the hollow body 4 will be forcibly discharged to the outside. 7 exhibits a kind of pressurizing effect, and is accompanied by the generation of compression heat, making it possible to further increase the exhaust gas temperature. When a plurality of hollow bodies 4 are arranged in series as shown in FIG. 2, it is possible to increase the temperature in stages and make the final exhaust temperature high. In this case, if the opening area of the gas outlet of each hollow body 5 is set to have a smaller exhaust capacity than the exhaust capacity of the rotating body 8 installed in the hollow body, the pressure near the gas outlet 6 tends to increase. However, since the air is taken in by the rotating body 7 installed in the hollow body 4 adjacent to the continuous exhaust side, the area near the gas outlet of the hollow body 5 on the most exhaust side eventually becomes high pressure, and this part becomes a kind of It exhibits a pressurizing effect, and with the generation of compression heat, the temperature increases more effectively.

In the case of three consecutive hollow bodies, if the electric motor 8 installed in each hollow body and driving the rotating body has the same capacity, the pressure inside each hollow body 4 will increase as it goes from the intake port side to the exhaust port side. It changes as 1:1/2:1/3. As shown in Fig. 2, the output ratio of each electric motor 8 is increased from the intake port side to the exhaust port side.
When the outputs of the electric motors 9 are made the same, there is almost no difference in the temperature of the warm air that is finally obtained when the outputs of the electric motors 9 are made the same. In this case, the opening area of the gas suction port 5 of the hollow body 4 on the most suction side needs to be of a size that can create a reduced pressure equilibrium state in the rotation region R of each rotating body. Therefore, the present invention provides a hot air dryer for washrooms that efficiently generates hot air in a constant pressure equilibrium state and that is efficient and has a small number of parts.

[Brief explanation of drawings]

FIG. 1 is a central sectional view of an embodiment of the invention, and FIG.
The figure is a central sectional view of another embodiment. 1...Hot air dryer for washroom, 2...Intake port, 3
...Exhaust port, 4...Hollow body, 5...Gas inlet,
6... Gas discharge port, 7... Rotating body, 8... Electric motor, g... Minute gap, R... Rotating region.

Claims (1)

[Scope of Claims] 1. A hot air dryer for washrooms having a gas intake port and a gas discharge port, which rotates with a gas suction capacity greater than the gas suction capacity of the gas suction port to achieve constant pressure equilibrium. A hot air dryer for a washroom, characterized in that a hollow body having an airtight structure is provided between an intake port and an exhaust port, and has a rotating body that generates heat by rotational action in a rotating region of the rotating body while maintaining a state. 2. In a hot air dryer for washrooms having a gas inlet and an exhaust port, the rotating body rotates with a gas suction capacity greater than the gas suction capacity of the gas inlet and maintains a constant pressure equilibrium state. A plurality of airtight hollow bodies each having a rotating body that generates heat due to rotational action in the rotating region are installed between the intake and exhaust ports by sequentially connecting the gas outlet and gas intake of each hollow body. Hot air dryer for washrooms. 3. The hot air dryer for washrooms according to claim 2, wherein the gas suction capacity of the plurality of hollow rotary bodies installed is the highest in the rotary body on the most intake side. 4. The hot air dryer for washrooms according to claim 2, wherein the gas suction capacity of the plurality of hollow rotating bodies decreases from the most inlet side to the most exhaust side. 5. A hot air dryer for washrooms having a gas intake port and a gas discharge port, which rotates with a gas suction and discharge capacity greater than the gas suction capacity of the gas intake port and the gas discharge capacity of the gas discharge port. A hot air dryer for a washroom, characterized in that a hollow body with an airtight structure having a rotating body that generates heat by rotational action in the rotating region of the rotating body while maintaining a constant pressure equilibrium state is provided between an intake port and an exhaust port. . 6. A hot air dryer for washrooms that has a gas intake port and a gas discharge port, and is rotated with a gas suction and discharge capacity that is greater than the gas intake capacity of the gas intake port and the gas discharge capacity of the gas discharge port. A hollow body with an airtight structure has a rotating body that generates heat due to rotational action in the rotating region of the rotating body while maintaining a constant pressure equilibrium state. and a hot air dryer for washrooms, characterized in that a plurality of them are installed between exhaust ports. 7. The hot air dryer for washrooms according to claim 6, wherein the gas suction and discharge capacity of the plurality of hollow rotary bodies installed is the greatest for the rotary body on the most intake side. 8. The hot air dryer for washrooms according to claim 6, wherein the gas suction and discharge capacity of the plurality of hollow rotary bodies decreases from the most inlet side to the most exhaust side.