JPH0638011B2 - Heat pump heater - Google Patents

Description

TECHNICAL FIELD The present invention relates to a heat pump type heater.

2. Description of the Related Art As shown in FIG. 3, a conventional heat pump type heater guides a high-temperature and high-pressure gas refrigerant discharged from a compressor 31 to an indoor heat exchanger 32 to release latent heat of condensation to heat indoor air to generate high-pressure liquid. It becomes a refrigerant, passes through the decompression mechanism 33, becomes a low-temperature low-pressure liquid refrigerant, absorbs latent heat of vaporization from the outside air by the outdoor heat exchanger 34, becomes a low-pressure gas refrigerant, and returns to the compressor 31 to heat the inside of the room.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-described configuration, when the operation is stopped for a long time and then restarted, most of the refrigerant in the heater is a low temperature outdoor heat exchanger 34 and the compressor when the engine is stopped. Since the refrigerant is accumulated in 31, the distribution of the refrigerant becomes non-uniform for a few minutes after the start, and the evaporation of the refrigerant in the outdoor heat exchanger 34 and the condensation of the refrigerant in the indoor heat exchanger 32 are compared with the steady state. It has a drawback that it becomes insufficient and the heating capacity at the time of start-up is insufficient to make the user uncomfortable.

In view of the above problems, the present invention does not compensate for the shortage of heating capacity with heat generated by a chemical reaction within a certain time after starting,
By returning to the normal heat pump operation, it is an object to provide a heat pump type heater having a good start-up characteristic.

Means for Solving the Problems In order to solve the above problems, a heat pump type air conditioner of the present invention has a main circuit in which a compressor, an indoor heat exchanger, a pressure reducing mechanism, and an outdoor heat exchanger are connected in an annular shape. And a reaction vessel filled with a medium that exhibits reversible endothermic heat generation by reacting with a solvent, which is provided so as to be capable of exchanging heat with the high-pressure side of the main circuit, and a reserve tank for storing the solvent, The reserve tank is arranged vertically above the reaction vessel, the lower part of the reserve tank and the upper part of the reaction vessel are connected by a passage with a solenoid valve in the middle, and the upper part of the reserve tank and the upper part of the reaction vessel are arranged in the middle. It is connected by a passage having a check valve capable of passing the solvent only from the reaction container toward the reserve tank.

Operation The present invention, due to the above configuration, enables more comfortable heating immediately after starting by supplementing the heating capacity with the heat generated by the chemical reaction for several minutes until the main circuit generates sufficient heating capacity at startup. .

Embodiment A heat pump type air conditioner according to an embodiment of the present invention will be described below with reference to FIG.

In FIG. 1, 11 is a compressor, 12 is an indoor heat exchanger,
15 is a heat exchanger, 16 is a reaction vessel, 17 is a solenoid valve, 18
Is a reserve tank, and 21 is a check valve. Here, the reaction vessel 16 is filled with silica gel as a medium, and the reserve tank 18 is filled with water 20 as a solvent. Further, the reserve tank 18, the solenoid valve 17, and the reaction vessel 16 are arranged so that when the solenoid valve 17 is opened, liquid water 20 moves into the reaction vessel 16 by gravity, and the check valve 21 is moved from the reserve tank 18 to the reaction vessel 16. Are arranged in a direction that hinders the movement of the solvent.

The operation of the heat pump type air conditioner configured as described above will be described below.

In the state before starting, the solenoid valve 17 is closed, the water 20 is collected in the reserve tank 18, and the silica gel in the reaction container 16 is in a dry state. Here, the solenoid valve 17 is opened at the same time when the compressor is activated, and the reserve tank 18 is opened.
The water 20 therein moves into the reaction vessel 16 by the action of gravity, where it reacts with the silica gel 19 to generate heat. This heat is given to the high-pressure refrigerant in the main circuit by the heat exchanger 15 and becomes heating heat quantity. At this time, the filling amounts of the silica gel 19 and the water 20 are adjusted according to the rising characteristics of the main circuit.

When the main circuit generates a sufficient amount of heating heat, the reaction between the silica gel 19 and the water 20 ends. When the amount of heat generated by the main circuit increases a few minutes after the start-up, this time the reaction vessel 16 that has completed the exothermic reaction takes heat from the high pressure refrigerant of the main circuit through the heat exchanger 15 and releases the absorbed water as water vapor. Start the reaction. The generated steam moves through the check valve 21 into the reserve tank 18, and is condensed into water 20. This reverse reaction continues to the equilibrium point determined by the temperature of the high temperature high pressure refrigerant in the main circuit. When the reverse reaction is completed, the sub circuit returns to the state before activation, and the main circuit returns to normal operation. The solenoid valve 17 is closed when the water 20 moves into the reaction vessel 16.

As described above, according to this embodiment, the reserve tank 18,
By installing an independent sub-circuit consisting of the solenoid valve 17, the reaction vessel 16, and the heat exchanger 15 so as to be able to exchange heat with the high-temperature high-pressure refrigerant of the main circuit, the heating capacity at the time of startup, which is insufficient in the main circuit, is supplemented and a good startup is achieved. A heat pump type heater having characteristics can be realized.

The second embodiment of the present invention will be described below with reference to FIG.

In the figure, 12 is an indoor heat exchanger, 17 is a solenoid valve, 1
8 is a reserve tank, 21 is a check valve, and the above is the same as that of the structure of FIG. The difference from the configuration of FIG. 1 is that the reaction vessel 46 is provided so as to be capable of heat exchange with the compressor high-pressure vessel 41.

The operation of the heat pump type air conditioner configured as described above will be described below.

During the exothermic reaction at the time of startup, the heat generated in the reaction vessel 46 is given to the compressor high-pressure vessel 41 to improve the starting characteristics, and after the exothermic reaction is completed, the compressor high-pressure vessel of the main circuit that sufficiently generates the heating capacity. A reverse reaction occurs in the reaction container 46 which receives heat from 41, and returns to the state before starting and thereafter the main circuit operates normally.

Even if the reaction vessel 46 is directly heat-exchanged with the compressor high-pressure vessel 41 as described above, it is possible to realize the heat pump type air conditioner having a good start-up characteristic by compensating for the insufficient heating capacity at the time of start-up which occurs in the main circuit. .

Although silica gel is used as the medium in the above embodiments, desiccant such as zeolite may be used, and water may be used as the solvent, but alcohol, freon, or the like may be used, or a combination thereof may be further modified.

Effects of the Invention As described above, the present invention provides an independent sub-circuit including a reserve tank, a check valve, a solenoid valve, a reaction vessel, a heat exchanger, etc., in which a reversible reaction with endothermic heat generation is generated. By providing reaction generation maturation so that it can exchange heat with the high-pressure side refrigerant of the main circuit, heat is generated by a chemical reaction until the main circuit generates sufficient heating capacity at startup, and the heat causes the heating capacity. , And more comfortable heating can be realized immediately after starting.

Particularly, in the present application, as the force for moving the reaction medium, gravity is used at the same time as the difference in the internal pressure between the containers, so that the reaction medium necessary for the reaction can be sufficiently supplied. Since the moving speed is sufficiently high, it is an optimal structure for the application of this system.

[Brief description of drawings]

FIG. 1 is a refrigeration cycle diagram of a heat pump type heater according to an embodiment of the present invention, FIG. 2 is a refrigeration cycle diagram according to a second embodiment of the present invention, and FIG. 3 is a refrigeration cycle diagram according to a conventional example. 11 ... Compressor, 12 ... Indoor heat exchanger, 13 ... Decompression mechanism, 14 ... Outdoor heat exchanger, 15 ... Heat exchanger, 16, 46 ... Reaction vessel, 17 ... Solenoid valve , 18 ... Reserve tank, 21 ... Check valve, 41 ... Compressor high pressure vessel, 45 ... Accumulator, 46 ... Reaction vessel.

Claims (3)

[Claims] 1. A main circuit is constructed by connecting a compressor, an indoor heat exchanger, a pressure reducing mechanism, and an outdoor heat exchanger in an annular shape, and a solvent provided so as to be capable of exchanging heat with the high pressure side of the main circuit. It has a reaction container filled with a medium exhibiting reversible endothermic / exothermic reaction, and a reserve tank for storing the solvent, and the reserve tank is arranged vertically above the reaction container, and The lower part and the upper part of the reaction container are connected by a passage having a solenoid valve in the middle thereof, and the upper part of the reserve tank and the upper part of the reaction container are connected to the solvent only in the direction from the reaction container to the reserve tank. A heat pump type heater connected by a passage with a check valve that can pass through. 2. The heat pump type heater according to claim 1, wherein the reaction vessel and a part of the pipe from the compressor outlet of the main circuit to the indoor heat exchanger are heat exchangeable. 3. The heat pump type heater according to claim 1, wherein the reaction container and the outer wall of the high pressure container of the compressor are capable of heat exchange.