JPS5869372A - Absorption heat pump - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention The present invention is characterized in that the evaporation temperature and vapor pressure of the refrigerant in the evaporator are set to be higher than the condensation temperature and vapor pressure of the refrigerant in the condenser, and the absorption temperature is also set higher than the generation temperature. (hereinafter simply referred to as absorption and one pump).

Generally, a refrigerator has a cooling side and a heat radiation side, and when the cooling side is used, it is called a refrigerator, and when the heat radiation side is used, it is called a refrigerator! −
)/Nde, and most of them are OE-, regardless of whether they are compression type or absorption type.
Dobongpu falls into this concept.

By the way, the absorption pump of the present invention is different from the above-mentioned concept.It is an absorption machine exclusively for the purpose of evaporating refrigerant with heat of low temperature Vpemu, and when adsorbing refrigerant vapor into the absorption liquid. A heat pump that extracts high-temperature hot water using the generated absorption heat.In other words, the evaporation temperature and vapor pressure of the refrigerant in the evaporator are higher than the condensation temperature and vapor pressure of the refrigerant in the condenser. , and also relate to types of absorption where the refrigerant absorption temperature is higher than the refrigerant generation temperature and -) bonding.

Figure 1 shows a conventional example of such an absorption heat pump.
Upper shell on high pressure side (1) K evaporator (z) and absorber (3)
However, the generator (5) and condenser (6) are installed in the lower body (4) of the low pressure couple.
), and these containers contain refrigerant bonders (7
) with a refrigerant pipe (8), a U-shaped refrigerant liquid return pipe (9)
, an absorption liquid pipe (b) having an absorption liquid pump (10), a U-shaped absorption liquid return pipe (b) and a heat exchanger (to) connected airtightly to form an absorption heat pump cycle 7I/, A heat source fluid is supplied to the evaporator (2) and the generator (6), and cooling water is supplied to the condenser (6) to obtain high temperature water from the absorber (3).

In such a conventional absorption pump, the unevaporated refrigerant in the evaporator (2) on the high pressure side is transferred to the refrigerant reservoir in the condenser (6) on the low pressure side via the U-shaped refrigerant liquid return pipe (9). The unevaporated refrigerant and the refrigerant condensed in the condenser (6) are returned to the shaft by pressure difference from the liquid reservoir through the refrigerant pipe (8) to the refrigerant bonder (7).
1 consists of a refrigerant circulation path that is distributed to the evaporator (2) on the high-pressure side, and the flow rate and temperature of solar hot water and other heat source fluids, or the flow rate of cooling water.

The pressure difference between the upper shell (1) and the lower shell (4) changes due to changes in external conditions such as temperature, and especially when the pressure difference becomes too small, the liquid refrigerant in the refrigerant liquid return pipe (9) changes. As a result, the refrigerant distribution to the evaporator ('1) is immediately stopped, and the bomb operation cannot be performed smoothly.
On the other hand, if the pressure difference becomes too large, the U-shaped refrigerant return pipe (9
) is broken, and the upper shell (1) and the lower shell (4) are communicated with refrigerant vapor, making it impossible to operate the unit, and eventually making it impossible to stably remove water from the water shortage. There are some problems that cannot be solved. Furthermore, the refrigerant pump (7) has a refrigerant flow rate discharge capacity, that is, a large head and a large flow rate, to achieve a sufficient lift from the low-pressure side lower shell (4) to the high-pressure side upper shell (1) and to spray sufficient refrigerant into the evaporator (t). It must have a discharge capacity, which has the drawback of high power consumption.

In view of such problems, the present invention provides a configuration in which a refrigerant circulation path having a first refrigerant pump is configured in the evaporator on the high pressure side, and a refrigerant distribution pipe having a second refrigerant pump is connected to the refrigerant circulation path. The object of the present invention is to provide an absorption heat pump that consumes little power and can stably obtain hot water.

Figure 2 shows a one-dormitory embodiment of the present invention, in which the upper shell (1) on the high pressure side, the K evaporator (2) and the absorber (3) are housed, and the lower shell (4) on the low pressure side houses the upper shell (1) on the high pressure side. k generator (S) and condenser (6)
These vessels are airtightly connected via a heat exchanger (to) to form an absorption heat pump cycle A/, and the evaporator (2) and generator (6) are supplied with heated waste water and waste steam. , *, etc., as well as supplying heat source fluids such as In the figures, the same books were used for those with the same structure as in Figure 1.

and (8) are the unevaporated refrigerant reservoir (to), the refrigerant distribution pipe (7f), the refrigerant distributor (goods), and the evaporator (
! A is a refrigerant circulation path constructed of a second refrigerant bonder (71), in which the liquid refrigerant from the reservoir A4, which is liquefied in the condenser (6), is guided to the second refrigerant bond (71). This is a refrigerant distribution pipe that connects the side wall of the evaporator (2) of the shell (1) and the condensed refrigerant reservoir (2). It is convenient to connect to a road (not shown), and it can be connected to any location on the required KWa circulation route 5.

The refrigerant is evaporated by the heat source fluid in the evaporator (2) of the high-pressure side upper shell (1), and the heat source is absorbed by the absorbed heat generated when the refrigerant vapor is adsorbed by the absorption liquid in the absorber (1). Hydrothermal water or warm water at a higher temperature than the fluid temperature is obtained, while the unevaporated refrigerant and the condensed refrigerant from the refrigerant distribution pipe are again distributed from the distributor to the evaporator (2) and evaporated.
/ is repeated to continuously obtain hot water or high temperature water from the absorber (3).

In this way, the absorption pump of the present invention has a high pressure side upper body (
1) evaporator (the refrigerant circulation path (85 is configured so that unevaporated refrigerant is repeatedly sprayed to the evaporator), to the generator (5) of the lower shell (4) on the low pressure side Even if there is a temporary decrease in the amount of refrigerant condensed due to a decrease in the amount of heating or the amount of cooling to the condenser (6), a sufficient amount of unevaporated refrigerant is distributed to the evaporator (2), and hot water or High-temperature water is obtained.In other words, according to the present invention, the pump generates high temperature water by changing the pressure difference between the upper shell (1) and the lower shell O) due to changes in external conditions such as heat source fluid and cooling water. Unlike the conventional example, the amount of refrigerant sprayed to the evaporator 11 was not significantly affected, and the upper shell (1) and lower shell (4) did not communicate with each other through steam, making it stable. Continuous operation is performed, and hot water and high temperature water can be stably obtained.

In addition, the first refrigerant pump (7) circulates the liquid refrigerant between the same pressure vessel called the upper body (1), so it only needs to be of a small lift, and the second refrigerant pump (7) circulates a small amount of condensation. It is sufficient to have the ability to discharge the refrigerant from the lower pressure side lower shell (4) to the higher pressure side upper shell (1), and the power consumption is lower than that of the conventional refrigerant bonder (7) which has a large head and large flow capacity. The power consumption of the first and second refrigerant pumps (7 ft) combined is less.

^ Next (to) is a liquid level controller installed in the condensed refrigerant reservoir (b), which turns on and off the second refrigerant bond (4).In other words, the water level in the liquid reservoir (b) When the lower limit value is exceeded, the second refrigerant bonder (7) is operated, and stops when the lower limit value is exceeded.By doing this, the amount of heat source to the generator (5) and to the condenser (6) is reduced. The condensed refrigerant in the liquid reservoir (b) does not become empty due to the decrease in the amount of condensed refrigerant accompanying the decrease in the cooling amount of
This prevents damage and enables safe pump operation.

In addition, On is a liquid level controller installed in the unevaporated refrigerant reservoir (2), and this controller starts and stops the second refrigerant bonder (7S).In other words, at the initial stage of the start of operation of the refrigerant pump, the liquid level controller ), the first refrigerant pump (7) is operated after the condensed refrigerant from the 8 layers has been sufficiently introduced into the refrigerant distribution pipe (8 layers) to prevent a cavity scene of the pump. If the conditions are stable, the liquid level controller (2) is not provided and the start signal of the second refrigerant pump (7) is held by itself until sufficient condensed refrigerant is introduced into the unevaporated refrigerant reservoir Ql. First refrigerant pump (7) configured to fully start (not shown)
You may do so.

As described above, the present invention provides an absorption heat pump in which the evaporator and absorber are on the high pressure side, and the generator and the condenser are on the low pressure side, in which the evaporator is provided with a refrigerant circulation path having a second refrigerant pump, Since a refrigerant distribution pipe with a second refrigerant pump that sends the condensed refrigerant to the circulation path is installed, the power consumption of the pump is small and there is no change in the external conditions of the heat source unit. However, hot water or high-temperature water can be extracted stably.

Figure 2 shows an embodiment of the absorption heat pump of the present invention.
F is an explanatory schematic diagram.

(2)...Evaporator, (3)...Absorber,
(δ) −・− Generator, <61−−−・Folder, E・
- Refrigerant circulation path, trS-11 cold sister bomb, i...-
- Refrigerant distribution pipe, tri-1 second refrigerant pump.

Applicant: 1 person other than Sanyo Electric Co., Ltd. Figure 1

Claims (2)

[Claims] (1) Heat source fluid is supplied to the evaporator and generator while cooling water is circulated to the condenser, and the generator, condenser, and evaporator are arranged so that hot water with a temperature higher than the temperature of the heat source fluid is extracted from the absorber. , a heat pump in which an absorber or the like is connected via piping, the refrigerant piping comprising a refrigerant circulation path having a first refrigerant pump in the evaporator and having a second refrigerant pump for sending liquid refrigerant from the condenser to the circulation path; An absorption and one-ship pump characterized by connecting. (2) The absorption pump according to claim 1, wherein a liquid level controller is provided in the refrigerant reservoir of the condenser, and the second refrigerant bond is turned on and off by the controller.