JP2008090243A - Demonstration apparatus and demonstration method of principle of operation of heat pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an easy to carry demonstration apparatus that enables viewer to visually comprehend the principle of operation of a heat pump. <P>SOLUTION: The demonstration apparatus of the principle of operation of a heat pump comprises a hollow circular cylinder which is made of atmospheric pressure resistant transparent material and fixed by one or a plurality of supporting stands, inside of which is airtight with a high-boiling point gas and a rubber balloon that is made airtight, except for its blow-in port, is interpolated, and on a part of whose external surface a spiral tube for making water flow through is welded or disposed; an air blower connected to the blow-in port of the balloon via a blast tube and a leak valve; and a blower for sending peripheral air to a part where the spiral tube is arranged. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a demonstration device and a demonstration method capable of visually understanding the operation principle of a heat pump.

  The heat pump uses the thermal energy of air (atmosphere), and can be applied to air conditioning equipment and the like to realize significant energy saving, and future spread is expected at the national level.

  Applicants and other electric power companies are also focusing on the spread of “EcoCute” (registered trademark), which is a highly efficient heat pump water heater using natural refrigerant (carbon dioxide), and understanding of its advertisement and publicity Of course, we are also putting effort into our activities.

  As shown in FIG. 1, this heat pump takes out heat energy from air through a cycle of refrigerant compression, condensation, expansion and evaporation by a compressor 1, a condenser 2, an expansion valve 3 and an evaporator 4. The water is heated to boil hot water. In addition, the temperature of the refrigerant | coolant etc. which were shown in FIG. 1 is an example.

  The applicant has conducted a method of explaining the principle of the heat pump by a method using written materials, a method of sending air to a small container, and a method of demonstrating only compression heat.

  As far as the applicants investigated, no literature was available on techniques to explain or demonstrate the principles of heat pumps in an easy-to-understand manner.

  Use the heat of air (which is a registered trademark of the applicant and is also said to be a catchphrase in Ecocute advertisements / promotions) What can be obtained (COP (coefficient of performance) exceeding 1) is difficult to understand from ordinary people's common sense of science. In the previous explanation method, in order to have you understand the principle of heat pump ,There is a limit.

  On the other hand, it is possible to modify the actual heat pump (for example, an air conditioner) for demonstration purposes. However, the cost of the modification is high, and the pipes are made of metal. Is inadequate.

  An object of the present invention is to provide means for solving these problems, that is, a demonstration device and a demonstration method capable of visually understanding the operating principle of a heat pump that is easy to carry.

  In the demonstration device of the operating principle of the heat pump according to the invention of claim 1, a high-boiling point gas is enclosed inside, a balloon made of a stretchable elastic material is inserted, and air is sealed except for the balloon blowing port. A hollow cylinder (cylinder) made of a pressure-resistant transparent material in which a spiral tube is fused or arranged in part and fixed by one or a plurality of support bases, and a blower tube and a leak at the balloon inlet It is provided with the air sending machine connected via a valve, and the air blower which ventilates surrounding air to the portion where the spiral tube is arranged.

  The demonstration device of the operating principle of the heat pump according to the invention of claim 2 is filled with a high-boiling point gas and hermetically sealed by an easily movable piston, and a balloon made of a stretchable elastic material is inserted, A hollow cylinder (cylinder) made of a pressure-resistant transparent material, provided with an air vent, and having a helical tube fused or disposed on a part of the outer surface and fixed by one or more support bases, and the balloon inlet And an air delivery device connected via a blower tube and a leak valve, and a blower for blowing ambient air to a portion where the spiral tube is disposed.

A method for demonstrating the operating principle of the heat pump according to the invention of claim 3 is that a high boiling point gas is sealed inside a transparent carbonated water bottle, a balloon made of a stretchable elastic material is inserted, and the air pump is It connects to the blowing port of a balloon through a leak valve, and the bottle is hermetically sealed except for the blowing port of the balloon, and the following processes (1) to (4) are continuously performed.
(1) The air pump is driven to expand the balloon and pressurize the high-boiling point gas to generate heat of compression.
(2) The temperature of the high boiling point gas is lowered by spraying water or sending air to a part of the bottle whose temperature is increased by the compression heat.
(3) The air encapsulated in the balloon is leaked and the high boiling point gas is decompressed and expanded to absorb the heat of vaporization.
(4) By sending ambient air to a part of the bottle whose temperature is lowered by the heat of vaporization, the high boiling point gas is vaporized by obtaining the heat of vaporization from the air.

  According to the present invention, it is possible to visually understand the operation principle of a heat pump that is difficult to understand from the common sense of science of ordinary people. In particular, the invention according to claim 3 makes it possible to visually understand the operating principle of the heat pump very easily and at low cost.

  FIG. 2 is a configuration diagram of the demonstration apparatus according to the first embodiment of the present invention, and individual components will be described below.

A hollow cylinder 5 made of a transparent material is prepared so that it can withstand high atmospheric pressure and the operation can be visually recognized, and a high boiling point gas 6 (a gas that is liable to be liquefied, for example, butane) is sealed inside the hollow cylinder 5 as a refrigerant. Further, a balloon 7 made of a stretchable elastic material (for example, rubber) for compressing and expanding the high boiling point gas 6 is inserted into the hollow cylinder 5, and the hollow cylinder other than the blowing port 8 of the balloon 7 is inserted. The inside of 5 is airtight.
Here, the amount of the high-boiling gas 6 to be sealed is based on the state equation of the gas based on the type of the high-boiling gas 6 and the realizable atmospheric pressure determined from the pressure resistance performance of the air delivery device 12 and the hollow cylinder 5 described later. Determined.

  In order to move the heat generated from the refrigerant to the outside, a spiral tube 9 through which water flows is fused or disposed on a part of the outer surface of the hollow cylinder 5. One or a plurality of fixing support bases 10 are arranged outside the hollow cylinder 5.

  In order to expand the balloon 7 (in order to compress the high-boiling point gas 6 of the refrigerant), an air delivery device 12 is connected to the blowing port 8 of the balloon 7 through the blower pipe 11, and the balloon 7 is rapidly deflated. Therefore, a leak valve 13 is also connected (to expand the high boiling point gas 6 of the refrigerant). Here, it is desirable to add a barometer to the air delivery device 12 in order to operate at or below the allowable atmospheric pressure of the hollow cylinder 5 and maintain safety.

  In addition, a blower 14 is installed to blow ambient air to the portion of the spiral tube 9 (that is, to take heat from the air).

  The operation of the four processes in one cycle of the demonstration apparatus will be described.

  By closing the leak valve 13 and operating the air delivery device 12, air is blown into the balloon 7 through the blower tube 11 to inflate the balloon 7. Due to the expansion of the balloon 7, the high boiling point gas 6 enclosed in the hollow cylinder 5 is compressed and heat of compression is generated. (Compression process)

  Water is passed through the spiral tube 9. Thereby, the high boiling point gas 6 is lowered to a saturation temperature corresponding to the pressurized pressure, generates heat of condensation (that is, the compression heat is taken away by the water flowing through the spiral tube 9), and is liquefied. (Condensation process)

  The leak valve 13 is opened, and the air sent to the balloon 7 is rapidly released to the outside air, and the balloon 7 is deflated. When the balloon 7 is deflated, the high-boiling point gas 6 is decompressed and expanded, and falls to a saturation temperature corresponding to the decompressed pressure. (Expansion process)

  By blowing outside air to the portion of the high-boiling gas 6 whose temperature has been lowered, heat in the air is given to the high-boiling gas 6 and the high-boiling gas 6 is all vaporized. (Evaporation process)

  FIG. 3 is a configuration diagram of a demonstration apparatus according to the second embodiment of the present invention. In the first embodiment, a piston 15 is installed inside the hollow cylinder 5 and the high-boiling point gas 6 is hermetically sealed by the piston 15, and the piston 15 is moved only by the operation of the balloon 7. It is two that the air vent 16 is provided in the column 5.

  In the first embodiment, the high-boiling point gas 6 is divided at both ends of the hollow cylinder 6 due to the expansion of the balloon 7, and the high-boiling point gas 6 in the portion that is the target of the heat pump operation and the non-target portion are in the expansion process, etc. And the visual effect of heat in and out fades. On the other hand, the second embodiment has an advantage that the portion where the high-boiling point gas 6 is located is not changed, and the visual effect of heat in and out is not impaired.

  As a matter of course, the operations of the four processes in one cycle of the second embodiment are the same as those of the first embodiment.

  The third embodiment of the present invention relates to claim 3 and is essentially the same as the first and second embodiments, but is a method that can be demonstrated much more easily than these. .

  A high-boiling point gas 6 is enclosed inside a transparent plastic bottle (which is disadvantageous in terms of heat transfer because the internal pressure is increased, but a slightly thicker one for carbonated drinks), and a balloon 7 is further contained. Insert. An air pump is connected to the blowing port 8 of the balloon 7 via a leak valve 13, and the PET bottle is hermetically sealed from outside air except for the blowing port 8.

  And the operation principle of a heat pump is demonstrated by performing the process from (1) to (4) continuously.

  (1) Heat is generated by driving the air pump to inflate the balloon to pressurize the high-boiling point gas. (Compression process)

  (2) The temperature of the high-boiling point gas is lowered by spraying water or sending air to the part of the bottle whose temperature is increased by the compression heat. As a result, the high boiling point gas lowered to the saturation temperature corresponding to the pressurized pressure generates condensation heat and liquefies while giving heat to the water or air. (Condensation process)

  (3) By leaking air enclosed in the balloon and depressurizing the high-boiling point gas, the high-boiling point gas is lowered to a saturation temperature corresponding to the depressurized pressure. (Expansion process)

  (4) By sending ambient air to the part of the bottle whose temperature is lowered by the heat of vaporization, the liquefied high boiling point gas obtains the heat of vaporization from the air and vaporizes all of the high boiling point gas. (Evaporation process)

Explanatory drawing of the operation principle of a heat pump. The block diagram of the demonstration apparatus concerning the 1st Embodiment of this invention. The block diagram of the demonstration apparatus concerning the 2nd Embodiment of this invention.

Explanation of symbols

5 ... hollow cylinder, 6 ... high boiling point gas, 7 ... balloon, 8 ... blow-in port, 9 ... spiral tube, 10 ... support base, 11 ... air blow tube, 12 ... Air delivery machine, 13 ... Leak valve, 14 ... Blower, 15 ... Piston, 16 ... Air vent

Claims (3)

A high-boiling point gas is sealed inside, a balloon made of a stretchable elastic material is inserted, and other than the balloon blowing port is hermetically sealed, and a spiral tube is fused or arranged on a part of the outer surface, and one or more A hollow cylinder (cylinder) made of a pressure-resistant transparent material fixed by a support base of
An air delivery device connected to the blowing port of the balloon via a blower pipe and a leak valve;
A blower that blows ambient air to the portion where the spiral tube is disposed;
An apparatus for demonstrating the operating principle of a heat pump characterized by comprising: A high-boiling point gas is sealed inside and air-tightened by an easily movable piston, and a balloon made of a stretchable elastic material is inserted. Further, an air vent is provided, and a spiral tube is fused or arranged on a part of the outer surface. A hollow cylinder (cylinder) made of a pressure-resistant transparent material provided and fixed by one or more support bases;
An air delivery device connected to the blowing port of the balloon via a blower pipe and a leak valve;
A blower that blows ambient air to the portion where the spiral tube is disposed;
An apparatus for demonstrating the operating principle of a heat pump characterized by comprising: A high-boiling gas is sealed inside a transparent carbonated water bottle, a balloon made of a stretchable elastic material is inserted, an air pump is connected to the balloon inlet through a leak valve, and the bottle is Airtight except for the balloon outlet,
A method for demonstrating the operating principle of a heat pump, characterized in that the following steps (1) to (4) are continuously performed.
(1) The air pump is driven to expand the balloon and pressurize the high-boiling point gas to generate heat of compression.
(2) The temperature of the high boiling point gas is lowered by spraying water or sending air to a part of the bottle whose temperature is increased by the compression heat.
(3) The air encapsulated in the balloon is leaked and the high boiling point gas is decompressed and expanded to absorb the heat of vaporization.
(4) By sending ambient air to a part of the bottle whose temperature is lowered by the heat of vaporization, the high boiling point gas is vaporized by obtaining the heat of vaporization from the air.

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