CN1389690A - Generator Structure Used in Absorption Diffusion Refrigerator - Google Patents

Abstract

A generator structure for absorption-diffusion type refrigerating unit is composed of a heating unit with a concentrated aqueous ammonia solution pipe as inner tube and a diluted aqueous ammonia solution pipe as outer tube, a double-tube for said heating unit, and a heat-conducting sleeve between said two tubes for heating the double-tube to release ammonia gas to generate bubble flow.

Description

Generator Structure Used in Absorption Diffusion Refrigerator

The invention relates to a generator structure used in an absorption-diffusion refrigeration device, in particular to an innovative structure which utilizes a heat conduction sleeve to reduce the thermal resistance between inner and outer tubes, thereby lowering the activation temperature of bubbles.

The difference between the general ammonia absorption refrigeration cycle and the compression refrigeration cycle lies in the way it completes the compression. In the absorption refrigeration cycle, the low-pressure ammonia vapor is absorbed by water, and the liquid solution is pumped by a hydraulic pump. to high pressure. As shown in Figure 1, it is the action flow chart of the ammonia absorption refrigeration cycle. First, the low-pressure ammonia vapor leaves the evaporator and enters the absorber, where it is absorbed by dilute ammonia solution. This process is carried out at a temperature slightly higher than that of the outside world. temperature, so there must be heat transfer to the outside; moreover, the obtained concentrated ammonia solution is pumped through a heat exchanger, and pumped into the generator maintained at high pressure and high temperature, thus, in the generator The incoming heat from the high-temperature heat source inside makes the ammonia vapor evaporate from the concentrated ammonia solution, flows to the condenser to condense to form liquid ammonia, and enters the evaporator, and the dilute ammonia solution produced by the generator passes through The heat exchanger returns to the absorber to complete an absorption refrigeration cycle.

In addition, in the refrigeration cycle system, in order to prevent waste caused by energy loss, there are often various pipeline designs, such as the design of double sleeves (or double tubes), and the double sleeves can be applied to In order to have a relatively complete heat exchange; however, the inner tube of the double sleeve is a concentrated ammonia solution tube, that is, the inner tube is heated indirectly through the outer tube due to heat transfer, so if you want to make the inner tube When the concentrated ammonia solution in the tube is separated into vapor and liquid, it must be heated to a relatively high temperature to activate the generation of bubbles; therefore, the generator needs to provide a considerable external energy to generate high temperature, which not only increases the overall power consumption, but also And it is also limited in design and application (for example, fuel cells and general waste heat that can generally generate medium and low temperatures cannot be used, so it cannot be implemented in small refrigerators, etc.); it can be seen that in actual use, it is obviously inconvenient and defective. , and urgently need to be improved.

The object of the present invention is to provide a generator structure used in an absorption-diffusion refrigeration device, so as to overcome the defects in the prior art.

The object of the present invention is achieved like this: a kind of generator structure that is used in the absorption diffusion type freezing device, its key lies in, comprises a heating device, a double casing that is positioned at this heating device and is located at this double casing The heat conduction sleeve between the inner and outer tubes; it has complete heat exchange and can reduce the thermal resistance between the inner and outer tubes, thereby reducing the bubble activation temperature of the generator.

In the generator structure used in the absorption-diffusion refrigeration device, the inner tube of the double casing is a concentrated ammonia solution tube, and the outer tube is a dilute ammonia solution tube.

In the generator structure used in the absorption-diffusion refrigeration device, a plurality of grooves can be opened on the surface of the heat conduction sleeve.

It can thus be seen that the present invention provides a generator structure used in an absorption-diffusion refrigeration device, which includes a heating device, a double casing positioned at the heating device, and an inner and outer tube located at the double casing The heat conduction sleeve between them, wherein, the inner tube of the double sleeve is a concentrated ammonia solution spray pipe, while the outer tube is a dilute ammonia solution pipe, and the surface of the heat conduction sleeve is provided with a plurality of grooves to facilitate the outer pipe The dilute ammonia solution passes through; accordingly, by heating the double sleeves, a relatively complete heat exchange can be achieved, and the heat conduction sleeve is used to reduce the thermal resistance between the inner and outer tubes, thereby reducing the bubble activation of the generator temperature.

The features and technical content of the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. However, the accompanying drawings are provided for reference and illustration only, and are not intended to limit the present invention.

Fig. 1 is the action flowchart of general ammonia absorption type refrigeration cycle;

Fig. 2 is the implementation status figure of generator structure of the present invention;

Fig. 3 is the side sectional view of generator structure of the present invention;

Fig. 4 is the sectional view of the B-B part of Fig. 3;

Fig. 5 is a sectional view of part C-C of Fig. 3 .

The present invention provides a generator structure used in an absorption-diffusion refrigeration device, wherein the absorption-diffusion refrigeration device (as shown in Figure 2) comprises a concentrated ammonia solution tank 1, a generator 2, a vapor-liquid separator Device 3, a condenser 4, an evaporator (figure omitted), an absorber 5, and necessary pipelines 6 and control devices (figure omitted) and other components.

This refrigerating device uses ammonia as a refrigerant agent, and can be divided into a strong ammonia solution and a dilute ammonia solution according to the concentration of ammonia water. It is heated by the generator 2, and as the temperature rises, so that the concentrated ammonia solution 70 starts to vaporize and generate bubbles, and separate the dilute ammonia solution 71 and ammonia vapor 72; wherein, the ammonia vapor 72 is then Enter this condenser 4 and be condensed, so that this ammonia vapor 72 condenses ammonia liquid 73, then this ammonia liquid 73 enters this evaporator (figure is omitted), and makes this ammonia liquid 73 be evaporated into ammonia gas (figure is omitted) ), and the ammonia gas (figure omitted) is mixed with hydrogen (figure omitted) flowing out from the absorber 5, so as to form mixed ammonia gas and hydrogen gas 74 and flow back to the concentrated ammonia solution tank 1.

In addition, the dilute ammonia solution 71 separated by the generator 2 enters the absorber 5, and the dilute ammonia solution 71 of the absorber 5 can interact with the mixed ammonia and hydrogen 74 passing through the absorber 5, so that the The dilute ammonia solution 71 is absorbed and gradually becomes concentrated ammonia solution 70 and flows back to the concentrated ammonia solution tank 1, and the mixed ammonia gas and hydrogen gas 74 passing through the absorber 5 is also absorbed and gradually becomes hydrogen gas (figure omitted) and enters the evaporation device (not shown), so as to complete the action flow of a refrigeration cycle.

Accordingly, the present invention is mainly designed for the generator of the above-mentioned absorption-diffusion refrigeration device; please refer to Fig. 2 and shown in Fig. 3 simultaneously, the concentrated ammonia solution 70 that flows out from this concentrated ammonia solution tank 1 promptly flows into a concentrated ammonia solution pipe 20, the concentrated ammonia solution pipe 20 is coaxially sleeved in a dilute ammonia solution pipe 21 (as shown in Figure 4) to form a double casing, and the concentrated ammonia solution pipe 20 and the dilute ammonia solution pipe 21 It is connected at the vapor-liquid separation device 3, that is, the concentrated ammonia solution 70 passed through the generator 2 is separated into dilute ammonia solution 71 and ammonia vapor 72, and when both flow to the vapor-liquid separation device 3 , the ammonia vapor 72 will flow upwards to the condenser 4, and the dilute ammonia solution 71 will flow back down into the dilute ammonia solution pipe 21.

In addition, the generator 2 uses a heating device 22 to heat the concentrated ammonia solution 70 and the dilute ammonia solution 71 passing through the concentrated and dilute ammonia solution pipes 20 and 21, so that the concentrated ammonia solution 70 is separated into dilute ammonia solution 71. and ammonia vapor 72, and a heat conduction sleeve 23 is set between the thick and dilute ammonia solution pipes 20 and 21 at the heating place. The dilute ammonia solution 71 in 21 passes through, and the heat conduction sleeve 23 can reduce the thermal resistance between the concentrated and dilute ammonia solution pipes 20 and 21, thereby reducing the bubble activation temperature of the generator.

To sum up, the present invention discloses a generator structure used in an absorption-diffusion refrigeration device, which mainly utilizes a heat conduction sleeve, so that the generator can achieve the effect of separating vapor and liquid at medium and low temperatures.

However, the above descriptions are only preferred feasible embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent structural changes made by using the description of the present invention and the contents of the accompanying drawings are included in the scope of the present invention. Within the scope of protection determined by the claims, it is agreed to state.

Claims (3)

1, a kind of generator architecture that is used in absorption-diffusion type refrigerator is characterized in that, includes two sleeve pipes and that a heater, is positioned at this heater and is located at heat conduction sleeve between the inner and outer pipe of this pair sleeve pipe; It has complete heat exchange, and can reduce the thermal resistance between inner and outer pipe, and then reduces the steam bubble activationary temperature of generator.

2, the generator architecture that is used in absorption-diffusion type refrigerator as claimed in claim 1 is characterized in that, the interior pipe of this pair sleeve pipe is to be the concentrated ammonia solution pipe, and outer tube then is the dilute ammonia solution pipe.

3, the generator architecture that is used in absorption-diffusion type refrigerator as claimed in claim 1 is characterized in that, this heat conduction sleeve surface is to offer plural groove.

Images