Air conditioner-heater

FIELD: mechanical engineering; reversible air conditioners.

SUBSTANCE: proposed air conditioner-heater consists of heat exchanger installed inside room and operating in summer period as evaporator, and external heat exchanger with fan operating in summer period as condenser, working medium, compressor with electric drive, four-way valve and branch pipes connecting above-indicated sets into common plant with possibility of reversing to make external heat exchanger operate as evaporator in cold seasons. Air conditioner-heater includes therosiphons in form of vertical gravity heat pipes whose evaporating parts are driven into ground, and condensing parts project over surface of ground being furnished with heat exchangers with air. Condensing parts of heat pipes with heat exchangers are enclosed, together with outer heat exchanger and fan, in sealed heat-insulated hood furnished with hatches to pass outer air into inner space of hood, when hatches are opened.

EFFECT: increased thermal energy transformation coefficient.

2 cl, 2 dwg

 

The invention relates to a power system and can be used in the application of reversible air-conditioning devices, cooling the air in homes and other premises during the warm period of the year and heating these premises in the cold season.

Known air conditioners that cool the air in the warm season, using the evaporator is located inside the premises, taking heat from the air in the room, the compressor is driven, in which the compressed vapors of the working fluid, and a condenser in which the vapors of the working fluid, undergoing a phase transition into a liquid, giving a latent heat to the outside air. The known device, carrying out the heating, for example, heat pumps using low-grade heat sources (see "Description of invention to the patent of Russian Federation №2264585 C1", IPC F24D 17/02).

Known reversible air conditioners, heaters in air-to-air in the cold season the evaporator and condenser are swapped, for example, have for the purpose of reversing the four-way valve. In them during the cold period of the year the condenser is a heat exchanger inside the room. And a pair of working fluid to give heat to the air inside the room, thereby topliva these premises. Heat is taking the outside air into the evaporator, which in the cold season is the external heat exchanger.

However, these devices can operate only at relatively high temperatures, i.e. at temperatures higher than about -10°C. At lower temperatures, which are often observed, for example in Siberia, the conversion of thermal energy falls, and space heating using such devices is not profitable. At low temperatures the operation of such devices is undesirable also because of the freezing of the oil in the compressor. Thus in parallel with the existing air conditioning-heater must have, as a rule, qualitatively other heating devices that use fuel or connected to the centralized heating networks, for example, have to have a boiler and used for space heating at relatively low temperatures and wear and consequently additional capital and operating costs.

The purpose of this invention is the provision of a wide class of air-heaters, including on the basis of serial products as a heating device, and at relatively low temperatures and relatively high energy conversion efficiency.

This t is l is achieved by air conditioning-heater consisting of the inside space of the heat exchanger, operating in the summer season as the evaporator and the external heat exchanger with a fan in the summer as the condenser, the working fluid of the compressor with an electric drive four-way valve, and pipes connecting these units in a single installation, with the possibility of reversing its operation in which the external heat exchanger works in the cold period of the year as the evaporator according to the invention is composed of thermosyphons, in the form of a vertical gravitational heat pipes, evaporative part of which is submerged in the ground, and capacitor parts protrude above the surface of the Earth and provided with heat exchangers with air, condensing part of the heat pipe heat exchangers are enclosed together with an external heat exchanger and a fan in an airtight insulated casing, provided with a hatch opening of the latter for the passage of external air into the internal space of the casing.

In the particular case of the hatches can be fitted with actuators, control system with temperature sensor, outdoor air opening hatches when the outside temperature is above some pre-established, and closing hatches at temperatures below a certain, in advance of the mouth of blennow.

Figure 1 shows a diagram of the air conditioner-heater. Fig 2. cutaway outdoor unit, representing the Union, prisoners in insulated casing, together with the fan and its drive, external heat exchanger and condenser portions of the heat pipes.

Air conditioning-heater consists of an inside space of the heat exchanger 1, the employee in the summer season the evaporator, cooling the room, and in winter, condenser, heating the indoor and the outdoor heat exchanger 2, an employee in the summer, the condenser, and in winter, the evaporator and in this period, taking in heat from the outdoor air. The heat exchangers through pipes are integrated into a common system with each other and with the compressor 3. The whole system is filled with the working fluid. Inside the heat-insulated casing 4 is placed finned condenser part of the heat pipes 7. They are located in the inner duct 6 so as to be in the stream of air flowing through the external heat exchanger 2. The duct 6 is located and the fan 5 driven. The evaporating section of heat pipes embedded in the ground 8. The exposed areas of the heat pipe is thermally insulated 9. In the casing 4 on both sides of the heat exchanger 2 mounted for opening and closing hatches 10 in the closed position, making the heat-insulated casing 4 PRA is automatically sealed.

The device operates as follows. In the summer hatches 10 are opened and the air from the atmosphere is supplied by the fan 5 through the external heat exchanger 2, while the gravitational heat pipes 7 do not change the temperature of the air, because they work as thermal diodes, i.e. transfer heat from the bottom up only in the cold season, when the temperature in the area of their condenser parts becomes lower than the ground temperature. Air is heated in the external heat exchanger 2, which in this warm period serves as a condenser and freely leaves the casing 4. If necessary, a device for heating of premises with four-way valve (not shown) the role of heat exchangers 1 and 2 are reversed and the heat exchanger 2 in this case works for cooling outdoor air. Hatches 10 closed during the coldest periods of the year when temperatures less say minus 8°C. the Air moved by the fan 5 through the condenser part of the heat pipes 7 and heated in this part of the device, goes to the external heat exchanger 2, an employee in this period, the evaporator where the air is cooled and, further, because the hatches 10 are closed, the air is returned back through the open channel formed by the inner duct 6 and the outer casing 4. Since the casing 4 and hatches 10 is made of insulated, even in strong m the roses almost all the heat coming from warmer than the outside air, ground, goes to the heat exchanger 2. In the offseason at moderate temperatures, say from plus 5 to minus 8°C hatches 10 are opened and the air from the surrounding space a few heated in the condenser part of the heat pipe 7, and then is cooled in the heat exchanger 2 and exits. In the latter case is also an interim mode of the device, in which heat is extracted by the heat exchanger 2 from the outside air and from the ground.

It provides the fundamental possibility of the operation of the device in the cold and the heat of the soil is used only in a limited period of the heating season. Because the inside of the housing 4 is supported by means of heat pipes relatively high temperature before entering it into the evaporator 2, the energy conversion efficiency will remain high during the entire heating season. A significant positive result is also that here the device can be collected from virtually any serial conditioning type air-to-air" with the function of generating heat in the cold season.

1. Air conditioning-heater consisting of the inside space of the heat exchanger, operating in the summer season as the evaporator, and apparently what about the heat exchanger with fan, working in the summer as the condenser, the working fluid, a compressor with an electric drive, four-way valve and pipes connecting these units in a single installation, with the possibility of reversing its operation in which an external heat exchanger in the cold period of the year serves as an evaporator, characterized in that it is composed of thermosyphons, in the form of a vertical gravitational heat pipes, evaporative part of which is submerged in the ground, and capacitor parts protrude above the surface of the Earth and is equipped with heat exchangers with air, condensing part of the heat pipe heat exchangers are enclosed together with an external heat exchanger and a fan in an airtight insulated casing, provided with hatches opening of the latter for the passage of external air into the internal space of the casing.

2. Air conditioning-heater according to claim 1, characterized in that the hatches are equipped with actuators, these actuators with temperature sensor, outdoor air, with the possibility of opening hatches when the outside temperature is above some predetermined and closing hatches at temperatures below a certain pre-installed.



 

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