JPH04156A - Absorption heat source device - Google Patents

Abstract

PURPOSE:To prevent heat loss from being produced owing to heat radiation to the air even with use of a cooling type condenser by allowing refrigerant vapor produced in a gas/liquid separation to move to the condenser upon heating operation by providing a first on-off valve in the middle of a refrigerant vapor transfer pipe that serves to transfer the refrigerant vapor from the gas/liquid separator to the condenser. CONSTITUTION:In heating operation a first on-off valve 17 is closed and a second on-off valve 23 is opened, and a heat transfer medium from an indoor machine is circulated and transferred to a second heat transfer part 13 by switch means 21 and further a reproducer 3 and a gas/liquid separator 4 are operated. Hereby, absorption liquid in the gas/liquid separator 4 is circulated, transferred and heated via a concentrated absorption fluid bypass pipe 24, and a diluted absorption fluid transfer pipe 16. Thereupon, a heat transfer medium from an outdoor machine is transferred to the second heat transfer part 13 in the gas/liquid separator 4 and is heated by heat involved in the absorption fluid for a heating cycle. Upon the heating cycle, refrigerant vapor produced in the gas/liquid separator 4 is not transferred to a condenser 5, and hence no heat radiation to the air is performed even in the case of the condenser 5 being of a cooling type.

Description

[Detailed description of the invention] Industrial applications The present invention relates to an absorption heat source device.

2. Description of the Related Art Conventionally, there are absorption type heat source devices for heating and cooling equipment. This absorption heat source device consists of an evaporator that evaporates a refrigerant (e.g., water), an absorber that absorbs the refrigerant vapor evaporated in the evaporator into an absorbing liquid (e.g., lithium bromide aqueous solution), and a refrigerant in the absorber. A regenerator that absorbs vapor and heats the diluted absorption liquid, a condenser that condenses the refrigerant vapor heated by the regenerator and separated from the liquid, and a refrigerant vapor separated by the regenerator. It consists of a concentrated absorption liquid transfer pipe that sends the concentrated absorption liquid that has become concentrated in the absorber to the absorber, and a dilute absorption liquid transfer pipe that has a solution pump in the middle and sends the diluted absorption liquid that has become diluted in the absorber to the regenerator. has been done. In this configuration, when performing indoor cooling operation, a refrigeration cycle of evaporation → absorption → regeneration → condensation of the refrigerant is performed, and
The heat medium from the indoor unit was guided into the evaporator for cooling. Furthermore, when performing indoor heating operation, a regenerator is operated and the heating medium from the indoor unit is guided to the regenerator for heating.

Problems to be Solved by the Invention According to the above conventional configuration, during heating operation, the refrigerant vapor evaporated and separated in the regenerator is naturally sent to the condenser via the refrigerant vapor transfer pipe. For this reason,
When the condenser is air-cooled, there is a problem in that heat is inevitably released and heat loss occurs.

Therefore, an object of the present invention is to provide an absorption type heat source device that does not cause heat loss even when the condenser is air-cooled.

Means for Solving the Problems In order to solve the above problems, the absorption type heat source device of the present invention includes:
When the refrigerant is evaporated, there is also a first heat transfer medium inside for cooling.
An evaporator in which a heat transfer section is placed, an absorber that absorbs the refrigerant vapor evaporated by the evaporator into an absorption liquid, and this absorber absorbs the refrigerant vapor and heats the diluted absorption liquid. a gas-liquid separator that separates refrigerant vapor from the gas-liquid mixed liquid heated by the regenerator and is provided with a second heat transfer section for cooling the heat transfer medium; An air-cooled condenser that condenses the refrigerant vapor separated by the liquid separator, and a concentrated absorption liquid transfer pipe that sends the concentrated absorption liquid, which is concentrated after the refrigerant vapor is separated by the gas-liquid separator, to the absorber, and A diluted absorption liquid transfer pipe having a solution pump thereon and sending the diluted absorption liquid diluted in the absorber to the regenerator, and a first on-off valve interposed in the middle, and a refrigerant separated by the gas-liquid separation. A refrigerant vapor transfer pipe for transferring vapor to the condenser, a refrigerant liquid transfer pipe for transferring the refrigerant liquid condensed in the condenser to the absorber, and a switching means interposed in the middle to transfer the heat transfer medium to the above-mentioned absorber. A heat transfer medium circulation transfer pipe that circulates and transfers the heat transfer medium to either the first heat transfer section or the second heat transfer section, a second on-off valve interposed in the middle, and the concentrated absorption liquid transfer pipe and the dilute absorption liquid transfer pipe. An absorbent bypass pipe is provided between the concentrated absorbent liquid transfer pipe and the dilute absorbent liquid transfer pipe to communicate with each other and bypass the absorber, and is provided between the concentrated absorbent liquid transfer pipe and the dilute absorbent liquid transfer pipe to transfer the heat of the concentrated absorbent liquid to the dilute absorbent liquid for heat recovery. It is equipped with a heat exchanger that performs

Function: A case will be described in which the above configuration is used as an outdoor unit of air-conditioning equipment.

First, when performing cooling operation, the first on-off valve is opened, the second on-off valve is closed, and the heat transfer medium from the indoor unit is circulated and transferred to the first heat transfer section by the switching means, If a normal refrigeration cycle is performed, the heat transfer medium from the indoor unit is cooled.

Next, when performing heating operation, the first on-off valve is closed, the second on-off valve is opened, and the heat transfer medium from the indoor unit is circulated and transferred to the second heat transfer section by the switching means. At the same time, the regenerator and gas-liquid separator are operated. Then, the absorption liquid in the gas-liquid separator is circulated and heated in the regenerator via the concentrated absorption liquid transfer pipe, the absorption liquid bypass pipe, and the dilute absorption liquid transfer pipe. At this time, since the heat transfer medium from the outdoor unit is transferred to the second heat transfer section in the gas-liquid separator, it is heated by the heat of the absorption liquid, and a heating cycle is performed. Moreover, in this heating cycle, the refrigerant vapor generated in the gas-liquid separator is not transferred to the condenser.
Even when the condenser is air-cooled, heat is not radiated to the atmosphere like in the past.

Example An embodiment of the present invention will be described below with reference to FIG.

The absorption type heat source device in this embodiment will be described, for example, as one used as an outdoor unit of an air-conditioning equipment consisting of an indoor unit and an outdoor unit.

That is, this absorption type heat source device evaporates the refrigerant and also has a first heat transfer tube (first heat transfer tube) for cooling a heat transfer medium (for example, water) that exchanges heat with an indoor unit (not shown) inside. 1; an absorber 2 in which refrigerant vapor evaporated in the evaporator 1 is introduced through a communication part (for example, a communication pipe) 12 and absorbed into an absorption liquid; This absorber 2
A regenerator 3 absorbs refrigerant vapor and heats the diluted absorption liquid, and a regenerator 3 separates the refrigerant vapor from the gas-liquid mixed liquid heated by the regenerator 3, and a heat transfer medium cooling device is installed inside. a gas-liquid separator 4 in which a second heat transfer tube (second heat transfer section) 13 is arranged; an air-cooled condenser 5 for condensing the refrigerant vapor separated by the gas-liquid separator 4; Liquid separator 4
The refrigerant vapor is separated and the concentrated absorption liquid is transferred to absorber 2.
A concentrated absorption liquid transfer pipe 14 for sending the concentrated absorption liquid to the regenerator 3, a dilute absorption liquid transfer pipe 16 having a solution pump 15 on the way to send the diluted absorption liquid diluted in the absorber 2 to the regenerator 3, and a first on-off valve on the way. A refrigerant vapor transfer pipe 18 is provided with a refrigerant vapor transfer pipe 17 for transferring the refrigerant vapor separated by the gas-liquid separator 4 to the condenser 5, and a refrigerant pump 19 is provided in the middle, and the refrigerant condensed in the condenser 5 is provided. Refrigerant liquid transfer pipe 20 for transferring liquid to the absorber 2
, a heat transfer medium circulation transfer pipe 22 that circulates and transfers the heat transfer medium to either the first heat transfer tube 11 or the second heat transfer tube 13 by means of a switching means 21 disposed in the middle, and a second on-off valve in the middle. 23 is interposed, and an absorption liquid bypass pipe 24 that connects the concentrated absorption liquid transfer pipe 14 and the dilute absorption liquid transfer pipe 16 to bypass the absorber 2; and the concentrated absorption liquid transfer pipe 14.
A heat exchanger 25 is provided between the absorbing liquid and the dilute absorbing liquid transfer pipe 16 to recover heat by imparting heat of the concentrated absorbing liquid to the dilute absorbing liquid.

Further, the heat transfer medium circulation transfer pipe 22 is a first transfer pipe 3 for transferring the heat transfer medium from the indoor unit to the first heat transfer pipe 11.
1, and a circulation pump 32 in the middle, and the above-mentioned first
A second transfer tube 33 for transferring the heat transfer medium that connects the heat transfer tube 11 and the second heat transfer tube 13, and a third transfer tube 34 for transferring the heat transfer medium from the second heat transfer tube 13 to the indoor unit side. , a first connecting pipe 35 that connects the middle of the first transfer pipe 31 and the middle of the second transfer pipe 33 on the upstream side of the circulation pump 32; 3 transfer pipe 3
4, and a second connecting pipe 36 that connects the middle part of the pipe.

Further, the switching means 21 includes a first three-way switching valve 41 interposed at a connection point between the first transfer pipe 31 and the first connecting pipe 35.
and a second three-way switching valve 42 interposed at the connection point between the second transfer pipe 33 and the second connection pipe 36.

Next, the operation in the above configuration will be explained.

■Cooling operation During cooling operation, the first on-off valve 17 is open, the second on-off valve 23 is closed, and the first and second three-way switching valves 41.
42 so that the heat transfer medium flows in the direction shown by arrow A in FIG.

In this state, the above-mentioned absorption heat source device is operated to perform a refrigeration cycle, and the heat transfer medium on the indoor unit side is circulated and transferred to the first heat transfer tube 11 in the absorber 2. In addition,
This refrigeration cycle is the same as before, so
The explanation will be omitted.

■Heating operation During heating operation, the first on-off valve 17 is closed, the second on-off valve 23 is opened, and the first and second three-way switching valves 41,
42 so that the heat transfer medium flows in the direction shown by arrow B in FIG.

In this state, the regenerator 3, gas-liquid separator 4, solution pump 15
and operates the circulation pump 32.

Then, the gas-liquid separator 4 on the side of the absorption heat source device which is the outdoor unit
The absorption liquid accumulated in the gas-liquid separator 4 is transferred to the regenerator 3 through the concentrated absorption liquid transfer pipe 14, the absorption liquid bypass pipe 24, and the dilute absorption liquid transfer pipe 16, where it is heated. This cycle will then be repeated. On the other hand, the heat transfer medium on the indoor unit side is transferred to the second heat transfer pipe 13 in the gas-liquid separator 4 via the first transfer pipe 31, first connection pipe 35, and second transfer pipe 33, and is recycled here. It is heated by the heat of the absorption liquid that has been heated and transferred in the vessel 3.

The heat transfer medium heated within the second heat transfer tube 13 is returned to the indoor unit via the third transfer tube 34 and used as a heat source.

In this way, during heating operation, the refrigerant vapor is transferred to the condenser 5.
Since the absorption liquid is not transferred to the absorber 2, there is no heat loss due to atmospheric heat radiation as in the conventional case, and since the absorption liquid is not transferred to the absorber 2, no extra heat loss occurs.

In the above embodiment, the evaporator 1 was bypassed via the first connecting pipe 35 during heating operation, but the heat transfer medium may be passed through the evaporator 1 depending on the case.

Further, instead of the three-way switching valves 41 and 42 in the above embodiment, two on-off valves may be used to provide the same function.

In addition, as shown in FIGS. 2 and 3, in order to increase thermal efficiency during heating operation, between the second transfer pipe 33 and the concentrated absorption liquid transfer pipe 14, or between the second transfer pipe 33 and the dilute absorption liquid Heat exchangers 51 and 52 for exchanging heat with the transfer pipe 16 may be provided.

Further, in the above embodiment, a heat transfer tube is shown as the first heat transfer section, but a flash type may be adopted, for example, as shown in FIG. is circulated and transferred to the second heat transfer section via the first connecting pipe 35.

Effects of the Invention As described above, according to the configuration of the present invention, the first on-off valve is interposed in the middle of the refrigerant vapor transfer pipe that transfers refrigerant vapor from the gas-liquid separator to the condenser. When conducting heating operation by guiding the medium to the regenerator, the refrigerant vapor generated in the gas-liquid separator does not move to the condenser, so even if an air-cooled condenser is used, it will not be affected by the conventional atmospheric heat radiation. No heat loss occurs.

[Brief explanation of the drawing]

FIG. 1 is an overall schematic configuration diagram showing one embodiment of the present invention, and FIG.
3 and 3 are schematic diagrams showing the main parts of a modified example of the present embodiment, and FIG. 4 is a schematic diagram of the main parts showing another embodiment of the first heat transfer section. 1... Evaporator, 2... Absorber, 3... Regenerator, 4... Gas-liquid separator, 6... Condenser, 11...
...first heat transfer tube, 12...refrigerant vapor transfer tube, 13
...Second heat transfer tube, 14...Concentrated absorption liquid transfer pipe, 1
5... Solution pump, 16... Dilute absorption liquid transfer pipe,
17...First on-off valve, 18...Refrigerant vapor transfer pipe, 20-76 medium liquid transfer pipe, 21...Switching means, 2
2... Heat transfer medium circulation transfer pipe, 23... Second on-off valve, 24... Dilute absorption liquid bypass pipe, 25... Heat exchanger.

Claims (1)

[Claims] 1. An evaporator that evaporates refrigerant and has a first heat transfer section disposed therein for cooling the heat transfer medium; an absorber that absorbs the refrigerant vapor evaporated by the evaporator into an absorption liquid; A regenerator that absorbs refrigerant vapor in an absorber and heats the diluted absorption liquid, and a regenerator that separates the refrigerant vapor from the gas-liquid mixed liquid heated by the regenerator, and a heat transfer medium cooling device inside. a gas-liquid separator in which a second heat transfer section is arranged; an air-cooled condenser for condensing the refrigerant vapor separated by the gas-liquid separator; A concentrated absorption liquid transfer pipe that sends the concentrated concentrated absorption liquid to the absorber, a dilute absorption liquid transfer pipe that has a solution pump in the middle and sends the diluted absorption liquid that has become diluted in the absorber to the regenerator, and A refrigerant vapor transfer pipe that is provided with a first on-off valve and that transfers the refrigerant vapor separated by the gas-liquid separation to the condenser; and a refrigerant liquid that transfers the refrigerant liquid condensed in the condenser to the absorber. A transfer pipe, a heat transfer medium circulation transfer pipe that circulates and transfers the heat transfer medium to either the first heat transfer section or the second heat transfer section by means of a switching means interposed in the middle, and a second on-off valve in the middle. is interposed between an absorption liquid bypass pipe that connects the concentrated absorption liquid transfer pipe and the dilute absorption liquid transfer pipe to bypass the absorber, and the concentrated absorption liquid transfer pipe and the dilute absorption liquid transfer pipe. What is claimed is: 1. An absorption heat source device comprising: a heat exchanger that is provided to recover heat by imparting heat possessed by a concentrated absorption liquid to a dilute absorption liquid.