JPS6311571Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an absorption heat pump with a boiler function that allows easy boiler operation switching in the absorption heat pump.

Conventionally, commonly used absorption heat pumps have only a heat pump function and cannot utilize boiler functions. For example, as shown in FIG. 1, the structure is such that the dilute absorption liquid in the regenerator 1 is separated into refrigerant vapor and concentrated absorption liquid in the separator 2, and this refrigerant vapor is simply sent to the evaporator 4 through the condenser 3. At the same time, the concentrated absorption liquid is guided to the absorber 6 via the heat exchanger 5. For this reason, when absorption heat pumps run out of waste heat, the heat source water and refrigerant may freeze and the absorption liquid may crystallize, so they have had to perform troublesome operations such as installing a separate safety device to shut down the pump.

In view of the above-mentioned circumstances, the present invention provides an absorption heat pump that can operate the boiler using the heat supplied to the regenerator even if the waste heat decreases and the supply temperature of heat source water to the absorption heat pump drops or stops. It is something to do.

Hereinafter, the present invention will be described with reference to the drawings of embodiments.

Reference numeral 1 denotes a regenerator for receiving driving fuel a, and a separator 2 is provided at the tip of a liquid lift pipe 7 disposed above the regenerator. and a branch pipe 10 toward the shell 9 of the absorber 6
A valve 11 is installed in the middle of the branch pipe 10. This valve 11 is controlled in conjunction with a thermostat 13 provided at the inlet or outlet of the heat source water supply pipe 12 disposed in the evaporator 4 section. 5 is a heat exchanger for once guiding the concentrated absorption liquid separated from the separator 2; the concentrated absorption liquid that has passed through the 5 parts of the heat exchanger is guided to the absorber 6; The dilute absorption liquid that has absorbed refrigerant vapor is introduced at the regenerator 6 section, and the dilute absorption liquid that has absorbed the refrigerant vapor is introduced at the regenerator 6 section and returned to the regenerator 1.

To explain this effect now, first of all, in the normal operation of an absorption heat pump, the dilute absorption liquid that has flowed into the regenerator 1 is heated to boiling point by the combustion gas, and this bubble flow is sent through the pumping pipe 7, as in the conventional absorption heat pump. The liquid is then led to a separator 2, where it is separated into refrigerant vapor and concentrated absorption liquid. Next, this refrigerant vapor is cooled in the evaporator 3, and the refrigerant liquid is sent to the evaporator 4, where it absorbs heat from the heat source water flowing through the heat source water supply pipe 12 in the evaporator 4 and evaporates. The water in the 12 water supply pipes is used for cooling, etc. The evaporated refrigerant vapor is absorbed by the concentrated absorption liquid supplied from the heat exchanger 5 side in the absorber 6, and the dilute absorption liquid whose concentration has been reduced by the refrigerant passes through the heat exchanger 5. After that, it is returned to the regenerator 1.

Here, when the supply temperature of the heat source water falls below the set value or when the heat source water supply pump stops, etc., the detection signal of the thermostat 13 at the heat source water inlet or outlet or the heat source water pump (not shown) is detected. Switching is performed by operating the valve 11 in conjunction with the electrical interlock signal from the That is, when the valve 11 is opened during heat pump operation, refrigerant vapor at relatively high pressure and high temperature (compared to the evaporator and absorber) flows into the evaporator 4 and absorber 6, increasing the pressure and temperature of the evaporator 4. , freezing of the heat source water and freezing of the refrigerant can be prevented, and since refrigerant vapor is absorbed into the absorption liquid of the absorber 6, crystallization of the absorption liquid in the absorber 6 can also be prevented, and heating of hot water in the absorber 6 can be prevented. becomes possible.

Therefore, in the absorption heat pump, hot water can be produced in the absorber 6 and the condenser 3 regardless of the presence or absence of heat source water and the temperature level of the heat source water. Incidentally, when the hot water load decreases and the output of the absorption heat pump remains, the thermostat 14 controls the amount of fuel to keep the hot water temperature constant.

As mentioned above, the absorption heat pump with boiler function of the present invention has piping branched from the refrigerant vapor piping from the regenerator to the condenser to the absorber and evaporator body, and a heat source water inlet or outlet is installed in the middle of this branch piping. By having a configuration equipped with a switching valve operated by a thermostat that detects temperature, the thermostat senses when there is insufficient waste heat and automatically opens the valve, so high-temperature refrigerant vapor can be used. Since the pressure of the absorber and the evaporator can be increased, the heat source water and the refrigerant can be prevented from freezing, and the refrigerant vapor can also be used to heat the hot water in the absorber and the condenser. Furthermore, there are practical effects such as being able to operate the boiler to produce hot water for heating the regenerator even without supplying heat source water to the evaporator.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional absorption heat pump, and FIG. 2 is an explanatory diagram of the present invention. 1... Regenerator, 2... Separator, 3... Condenser,
4...evaporator, 5...heat exchanger, 6...absorber,
8... Refrigerant vapor piping, 9... Shell, 10... Branch piping, 11... Valve, 12... Heat source water supply pipe, 13...
...Thermostat.

Claims (1)

[Scope of utility model registration request] An absorption heat pump that guides refrigerant vapor from a regenerator to a condenser via a separator, guides this refrigerant liquid to an evaporator, and guides a concentrated absorption liquid that can be separated from the separator to the absorber via a heat exchanger, A branch pipe leading to the body of the absorber and evaporator is connected to the refrigerant vapor pipe from the regenerator to the condenser, and a heat source water supply pipe connected to the evaporator is connected to a valve attached to the branch pipe. An absorption heat pump with a boiler function, which is connected to a thermostat that detects the water inlet or outlet temperature, and is connected to another thermostat attached to the heat exchange pipe that passes through the condenser to the combustion section of the regenerator.