JPH0566479U - Absorption refrigerator - Google Patents

Abstract

(57) [Abstract] [Purpose] In an absorption chiller using a refrigerant storage tank, without using a heat insulating material, it is possible to prevent the refrigerant storage tank from being condensed and submerged when the operation is stopped. [Structure] A refrigerant storage tank is provided in the non-condensable gas storage tank. [Effect] Since a heat insulating material is unnecessary due to the vacuum heat insulating effect inside the non-condensable gas storage tank, the device can be downsized.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a refrigerant storage tank of an absorption refrigerator.

[0002]

[Prior Art]

 As an alternative to the small-sized absorption refrigerator without the refrigerant reservoir and the refrigerant pump of the evaporator, as shown in FIG. 2, the refrigerant storage tank 13 and the valve are provided in the refrigerant path from the condenser 7 to the evaporation chamber 8. 14 is provided, the concentration of the solution is adjusted by releasing the refrigerant liquid (water) accumulated in the refrigerant storage tank 13 when the concentration of the solution becomes too high, or at the end of the operation, to prevent the generation of crystals. To prevent.

In the figure, 1 is a load pipe for circulating cold water to an indoor cooling unit or the like, and 2 is a cooling water pipe for introducing cooling water from an outdoor cooling tower or the like, which is generated in a high temperature regenerator 4 by heating a burner 3. The refrigerant vapor (water vapor) and the medium concentration solution of the absorbent (lithium salts) are separated in the gas-liquid separator 5, and the refrigerant vapor is heated through the heating pipe of the low temperature regenerator 6 and then released from the solution. It is cooled in the condenser 7 together with the generated refrigerant vapor and returned to the refrigerant liquid (water), and is further sprayed on the tube bundle of the evaporator 8 to cool the cold water in the load circuit 1 by itself evaporating and cooling the cold water in the absorber 9 Condenses at the same time and is absorbed by the solution. On the other hand, the medium-concentration solution is sent from the gas-liquid separator 5 to the low-temperature regenerator 6 through the high-temperature heat exchanger 10, concentrated to a high concentration by the above-mentioned refrigerant vapor, and then further passed through the low-temperature heat exchanger 11. Is sent to the absorber 9 and absorbs the refrigerant vapor from the evaporator 8 to become a dilute solution. The diluted solution is pressure-fed to the high temperature regenerator 4 while being heated by the low temperature heat exchanger 11 and the high temperature heat exchanger 10 by the solution pump 12.

[0004]

[Problems to be solved by the device]

 In the above-mentioned configuration, it is the evaporator 8 that needs to be kept cool due to the low temperature during operation, but the temperature of the evaporator 8 drops to about 5 ° C. However, when the operation of the refrigerator is stopped, the generation of refrigerant vapor in the high temperature regenerator 4 occurs. The supply of the refrigerant liquid from the condenser 7 to the refrigerant storage tank 13 is also stopped because the pressure in the condenser 7 is lowered and the cooling water is stopped. Furthermore, since the pressure difference between the condenser 7 and the evaporator 8 disappears, the supply of the refrigerant liquid to the evaporator 8 is also stopped, so that the pressure in the refrigerant storage tank 13 decreases while the refrigerant liquid is stored. As a result, the refrigerant liquid evaporates in the refrigerant storage tank 13 and the heat of vaporization is removed, so that the temperature of the refrigerant storage tank 13 decreases.

As a result, when the operation is stopped, dew condensation is formed on the surface of the refrigerant storage tank 13 and the inside of the machine is submerged. Therefore, in order to prevent this, it is necessary to cool the outer wall of the tank 13 with a heat insulating material. There was a problem that it was against the demand for miniaturization. The present invention aims to solve such problems.

[0006]

[Means for Solving the Problems]

 As shown in FIG. 1, the present invention is provided with a refrigerant storage tank 13 for temporarily storing a refrigerant liquid in a refrigerant path from a condenser 7 to an evaporator 8 to adjust the concentration of a solution. In the refrigerator, the refrigerant storage tank 13 is provided in the non-condensable gas storage tank 15.

[0007]

[Action]

 Although the non-condensable gas storage tank 15 is not kept cold, the inside of the non-condensable gas storage tank 15 is in a vacuum state. Act on. Therefore, the volume of the non-condensable gas storage tank 15 needs to be increased by that amount, but the heat insulating material for keeping the refrigerant storage tank 13 cool is not necessary, and the overall size of the device and cost reduction can be achieved. In addition, the number of tanks is reduced and the layout is easier.

[0008]

【Example】

 FIG. 1 shows an embodiment of the present invention, and is different from the conventional example of FIG. 2 in that a refrigerant storage tank 13 is provided in a noncondensable gas storage tank 15. The refrigerant storage tank 13 temporarily stores the refrigerant liquid condensed in the condenser 7 and supplied to the evaporator 8, and controls the refrigerant content of the absorbing solution by adjusting the amount of the refrigerant liquid stored by the valve 14 or the like. However, this prevents crystallization of the solution when the operation is stopped or the temperature of the cooling water is lowered, and is usually provided in the vicinity of the condenser 7. On the other hand, the non-condensable gas storage tank 15 accumulates non-condensable gases such as hydrogen gas generated in the refrigerator due to the action of the air invading from the valves and the action of the corrosion inhibitor, and the non-condensable gas storage tank 15 is removed from the machine when it reaches a certain amount. It is for discharging and is provided above the machine body for convenience of air extraction.

The refrigerant storage tank 13 is fixed to the wall surface of the noncondensable gas storage tank 15 by a pipe joint with a gap provided between the outer wall surface thereof and the inner wall surface of the noncondensable gas storage tank 15. Even when the temperature inside the refrigerant storage tank 13 decreases due to the evaporation of the refrigerant inside when the operation is stopped, there is almost no heat conduction from the noncondensable gas storage tank 15, and therefore dew condensation also forms on the outer wall surface of the noncondensable gas storage tank 15. There is no fear.

[0010]

[Effect of the device]

 As described above, the present invention has an extremely simple structure in which the refrigerant storage tank is provided in the non-condensable gas storage tank, and the non-condensable gas storage tank plays a heat insulating function for the refrigerant storage tank. Since there is no risk of water inside the machine being contaminated by dew condensation on the outer wall surface of the machine, there is no need for a heat insulating material to keep the refrigerant storage tank cool, so the overall size and cost of the equipment can be reduced and the number of elements can be reduced. There is an advantage that layout can be facilitated by reducing

[Brief description of drawings]

FIG. 1 is a schematic system diagram of an embodiment of the present invention.

FIG. 2 is a schematic system diagram of a conventional example.

[Explanation of symbols]

 1 Load piping 2 Cooling water piping 3 Burner 4 High temperature regenerator 5 Separator 6 Low temperature regenerator 7 Condenser 8 Evaporator 9 Absorber 13 Refrigerant storage tank 14 Valve 15 Non-condensable gas storage tank

Claims (1)

[Scope of utility model registration request] 1. An absorption refrigerator in which a refrigerant storage tank for temporarily storing a refrigerant liquid is provided in a refrigerant path from a condenser to an evaporator to adjust a concentration of a solution, and the refrigerant storage tank is provided with the refrigerant storage tank. An absorption chiller installed in a non-condensable gas storage tank.