JPH10300260A - Absorption water cooler-heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorption water cooler-heater using plate heat exchangers which enable substantial miniaturization of heat exchanger elements and enable easy alteration of a design even in the case of series construction according to refrigerating capacities. SOLUTION: A low-temperature regenerator 2, a condenser 3, an evaporator 4 and an absorber 5 constituting an absorption water cooler-heater are equipped respectively with first plate heat exchangers 2a, 3a, 4a and 5a provided with a plurality of bag-shaped panels in juxtaposition and the direction of juxtaposition of the panels is made identical. Besides, a low-temperature solution heat exchanger 6 and a high-temperature solution heat exchanger 7 are equipped with second plate heat exchangers 6a and 7a constructed by stacking a plurality of heat transfer plates alternately, and the direction of stacking thereof is made identical with the direction of juxtaposition of the panels of the first plate heat exchangers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption chiller / heater, in which the heat exchanger of each element of the absorption chiller / heater is made of a plate type to reduce the size thereof. An absorption chiller / heater using a plate heat exchanger whose design can be easily changed is used for, for example, an air conditioner.

[0002]

2. Description of the Related Art Generally, a plurality of tubes are mounted on each heat exchanger of an evaporator, an absorber, a condenser, and a low-temperature regenerator in a conventional absorption chiller / heater. In order to reduce the size of the heat exchanger, it is necessary to improve the wettability of the heat transfer surface outside the tube or to increase the surface area. The heat transfer performance was improved by using tubes. In addition, models with different refrigeration capacities responded by changing the length and number of tubes.

[0003] For example, in the technique described in Japanese Patent Application Laid-Open No. 6-42837, the size of an absorption chiller / heater is reduced.
The evaporator and the absorber are equipped with a heat exchanger consisting of a bellows fin and a seal plate that are continuously bent from a thin plate.The peak of the bellows fin of the evaporator and the peak of the bellows fin of the absorber face each other. What is arranged is known.

[0004]

The absorption chiller / heater equipped with the above-mentioned conventional tube-type heat exchanger has a limit in miniaturization, and in order to achieve a significant miniaturization, it is necessary to use another type of heat exchanger. It is necessary to mount a vessel. In particular, when the absorption chiller / heater is to be configured in series according to refrigeration capacity, if the heat exchanger is a tube system, if the length of the tube is changed, the model will be the same as the size of the can body on which the heat exchanger is mounted. When the number of pipes is changed, if one model is used for several models, there is a problem that a space is wasted and the size cannot be reduced.

Further, by changing the length and number of tubes, the pressure loss of the medium flowing in the evaporator, the absorber, the condenser, and the low-temperature regenerator differs for each model having different refrigeration capacity. Therefore, when designing each model with different refrigeration capacity, while considering the allowable pressure loss,
It is necessary to change the number and length of the tubes with respect to the required heat transfer surface, the tube plate for supporting the tubes, and the like, which causes a problem that the design change becomes difficult.

On the other hand, according to the technique described in Japanese Patent Application Laid-Open No. 6-42837, a bellows fin formed by continuously bending a thin plate is used as a heat transfer surface. It is necessary to change the size of the bellows fins or the number of fins corresponding to each model together with the size of the body. Furthermore, in this structure, it is difficult to make the circulating water flow uniformly for each fin inside the inside surrounded by each bellows fin and the seal plate. In this case, the pressure loss of the circulating water changes. Even in such a case, when designing models having different refrigeration capacities, it is necessary to change the size of the bellows fins and the number of fins with respect to the necessary heat transfer surface while considering the allowable pressure loss. There was a problem that the change was difficult.

The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to greatly reduce the size of various heat exchanger elements constituting an absorption chiller / heater, Another object of the present invention is to provide an absorption chiller / heater using a plate heat exchanger whose design can be easily changed even when a series configuration is made for each refrigeration capacity.

[0008]

In order to achieve the above object, a first configuration of an absorption chiller / heater according to the present invention comprises at least a high-temperature regenerator, a low-temperature regenerator, a condenser, an evaporator, and an absorber. , A high-temperature solution heat exchanger, an absorption chiller-heater in which a low-temperature solution heat exchanger is operatively connected by piping,
At least two of the condenser, the evaporator, and the absorber form a bag-shaped panel forming a sealed space inside the heat transfer surface facing each other, and a predetermined gap is formed between the heat transfer surface of the adjacent bag-shaped panel. A plurality of the bag-shaped panels are arranged side by side in the formed state, and a flow path communicating the inner space of the bag-shaped panels is provided between the plurality of the bag-shaped panels to allow the first medium to flow, and the plurality of the bag-shaped panels are formed. The second medium is circulated in the outer space of the panel,
The heat transfer surfaces facing each other include a plate heat exchanger having a heat transfer promotion surface that generates turbulence inside the bag-shaped panel, and at least two of the plate heat exchangers are the plate heat exchangers. Are all arranged side by side in the same direction.

The second configuration of the absorption chiller / heater according to the present invention comprises at least a high-temperature regenerator, a low-temperature regenerator, a condenser, an evaporator, an absorber, a high-temperature solution heat exchanger, and a low-temperature solution heat exchanger. Chiller, condenser, evaporator, and absorber, wherein at least two of the low-temperature regenerator, the condenser, the evaporator, and the absorber form a sealed space inside the heat transfer surface facing each other. Plural panels are arranged side by side in a state where a predetermined gap is formed with the heat transfer surface of the adjacent bag-shaped panel,
A flow path communicating the inner space of the bag-shaped panel is provided between the plurality of bag-shaped panels to allow the first medium to flow, and the second medium is flown to the outer space of the plurality of bag-shaped panels. The heat transfer surfaces facing each other comprise a first plate heat exchanger having a heat transfer promotion surface for generating turbulence inside the bag-shaped panel, and a high-temperature solution heat exchanger, At least one of the low-temperature solution heat exchangers penetrates a plurality of medium flow tubes and stacks a plurality of heat transfer plates, and a heat transfer surface of the heat transfer plate has a curved ridge in which concave portions and convex portions are continuous. The curved ridges of the heat transfer plates adjacent to each other are stacked so that the directions of the bends are respectively opposite to each other to form a flow path, and a plurality of heat transfer plates are formed for each of the stacked heat transfer plates. So that one medium and the second medium are alternately distributed Is the result from the second plate heat exchanger, at least two of said first plate heat exchanger,
The panels constituting the plate heat exchanger are all arranged side by side in the same direction, and the heat transfer plates constituting the second plate heat exchanger are replaced with the panels of the first plate heat exchanger. They are arranged so as to be stacked in the same direction as the juxtaposition direction.

[0010]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIG. First, the configuration and operation of the absorption chiller / heater will be described with reference to the cycle system diagram of FIG. FIG. 10 is a cycle diagram of a general absorption chiller / heater. The arrows in the figure indicate the direction of flow of cold water, cooling water, solution, refrigerant, and the like. The general absorption chiller / heater has seven heat exchangers, a high temperature regenerator 101, a low temperature regenerator 102, a condenser 103, an evaporator 104, an absorber 105, a low temperature solution heat exchanger 106, and a high temperature solution heat exchanger 107. It is composed of a solution pump 108 for circulating the element and the absorbing solution, and a pipe connecting them.

The operation of the cooling operation will be described. During the cooling operation, the high-temperature regenerator 101 heated by the external heat source
The refrigerant vapor generated by concentrating the solution of
The solution in the low-temperature regenerator 102 is heated and concentrated by being guided to the heat exchanger 102 a in 2, generates refrigerant vapor, condenses and liquefies, and flows into the condenser 103. The refrigerant vapor generated in the low-temperature regenerator 102 is guided to the condenser 103, cooled by the cooling water passed through the heat exchanger 103a, and condensed and liquefied.
The refrigerant is sent to the evaporator 104 together with the refrigerant from No. 1. The liquid refrigerant in the evaporator 104 is supplied to the heat exchanger 104a in the evaporator 104.
And heat exchange with cold water flowing in the heat exchanger 104 a to evaporate and flow into the absorber 105. The cooling effect is exerted by the latent heat of evaporation at that time.

In the absorber 105, the concentrated solution concentrated in the high-temperature regenerator 101 and the low-temperature regenerator 102 is supplied to the absorber 105.
It is sprayed to the heat exchanger 105a inside, is cooled by the cooling water flowing in the heat exchanger 105a, absorbs the refrigerant vapor from the evaporator 104, and generates a dilute solution. The dilute solution in the absorber 105 is divided into two by a solution pump 108 via a low-temperature solution heat exchanger 106, and one is supplied to a low-temperature regenerator 102,
The other is further supplied to the high temperature regenerator 101 via the high temperature solution heat exchanger 107. The cooling cycle is configured as described above.

Next, the difference between the heating operation and the cooling operation will be described. During the heating operation, the cooling water is not passed through the absorber 105 and the condenser 103. Therefore, the refrigerant vapor guided from the low-temperature regenerator 102 in the condenser 103 is sent to the evaporator 104 at a high temperature without being condensed and liquefied. Further, by opening the cooling / heating switching valve 110, the high-temperature solution and the refrigerant vapor are directly supplied from the high-temperature regenerator 101 to the absorber 10
It is led to 5. This refrigerant vapor is not cooled by the absorber 105, but is sent to the evaporator 104, and together with the refrigerant vapor from the condenser 103, heats the hot water flowing in the heat exchanger 104a in the evaporator 104. The heating cycle is configured as described above.

In the absorption chiller / heater performing the above operation,
FIG. 1 and FIG. 2 show plate heat exchangers used for heat exchanger elements such as a low-temperature regenerator, a condenser, an evaporator, and an absorber.
This will be described with reference to FIG. Drawing 1 is an explanatory view of a panel which constitutes a plate heat exchanger concerning one embodiment of the present invention,
(A) is a plan view, (b) is an AA cross-sectional view of (a), and FIG. 2 is a side view showing a configuration of a plate heat exchanger according to an embodiment of the present invention.

In FIGS. 1 and 2, reference numeral 21 denotes a bag-like panel forming a sealed space inside the heat transfer surfaces facing each other, and 22 denotes a joint for forming the heat transfer surfaces facing each other into a bag-like panel. The edge forming part, 23 is a panel 21
The inflow opening 24 provided at the lower left when viewed from the front (FIG. 1 (a)) is the outflow opening 25 provided at the upper right as viewed from the front of the panel 21 (FIG. 1 (a)). , 25
c) is a ridge formed on the heat transfer surface.
In FIG. 1A, a concave portion and a convex portion are continuous in the horizontal direction toward FIG. 1A, and are provided meandering in the vertical direction toward FIG. 26 is an inflow pipe of the first medium provided in contact with the inflow opening 23, 27 is an outflow pipe of the first medium provided in contact with the outflow opening 24, and 28 is an inflow opening of the first medium. The inflow header 29 that is in communication is the outflow header that is in communication with the outflow opening 24.

FIG. 1A shows an embodiment of the ridge 25 described above.
This will be described in more detail with reference to FIG. For example, FIG.
(A) As shown in (b), the concave portion 25a (shown by a solid line) on the front surface and the concave portion 25b (shown by a broken line) on the back surface are vertically aligned so that they contact each other at points 25c inside the panel 21. A meandering ridge 25 is formed. The panel 21 is formed into a bag-like panel by being joined by, for example, brazing or welding at each point 25c inside the panel 21 that mainly contacts the edge 22 on the inside of the heat transfer surface.

Next, the structure of the plate heat exchanger 20 including the panel 21 as a component will be described with reference to FIG. A plurality of panels 21 are juxtaposed in accordance with the refrigerating capacity of the absorption chiller / heater. The panels 21 communicate with each other by an inflow header 28 at an inflow opening 23 provided in the panel 21, and communicate with an outflow header 29 at an outflow opening 24 provided in the panel 1. Adjacent panels 21 are provided with gaps at regular intervals and communicate with the surrounding space of the plate heat exchanger 20. Also, only one surface of one panel 21 located at both ends of the plate heat exchanger 20 is not provided with the inflow opening 23 and the outflow opening 24 (not shown), and one surface of the other panel 21 is provided with the inflow opening. 23
Is connected to the inflow side pipe 26, and the outflow opening 24 is connected to the outflow side pipe 27.

As described above, the bag-shaped panels 21 constituting the plate heat exchanger 20 are arranged side by side.
Since the pressure loss of the first medium flowing inside, for example, cold water, can be made the same, even if the number of panels 21 of the same size increases or decreases, the piping connected to the plate heat exchanger 20 or the cold water Also, the design along with the selection of a circulation pump or the like for circulating the cooling water becomes easy.

Further, the bag-shaped panel 21 can significantly reduce the inner volume of the panel 21 compared to the inner volume of the tube system, and also has the ridges on both sides on the heat transfer surface of the panel 21 as shown in FIG. As shown in FIG. 1B, the points 25c where the recesses 25a and 25b are joined inside the panel 21 as shown in FIG. 1B are alternately arranged with respect to the flow direction of cold water or the like flowing inside the panel 21. It can withstand the pressure difference between the inside and outside and generate strong turbulence.
Therefore, since the heat transfer performance per unit area can be improved as compared with the conventional tube system, the size can be significantly reduced as compared with the tube system.

The shape of the ridge 25 on the heat transfer surface of the panel 21 shown in FIG. 1 is not limited to this as long as it can generate severe turbulence inside the panel 21.
Even if the number, angle, and direction of meandering are changed, the same effects as described above can be obtained. Further, for example, even when the heat transfer surface is a parallel plate and a heat transfer promoting member such as a fin is provided inside, the same effect as described above can be obtained.

Next, the second plate heat exchanger employed in the heat exchanger elements of the high-temperature solution heat exchanger and the low-temperature solution heat exchanger in the absorption chiller / heater will be described with reference to FIGS. I do. FIG. 3 is a front view of a heat transfer plate according to an embodiment of the present invention, FIG. 4 is a perspective view of a heat exchanger formed by stacking the heat transfer plates of FIG. 3, and FIG. FIG. 3 is an exploded explanatory view showing a flow of a medium in the exchanger.

In the second plate heat exchanger, FIG.
The heat transfer plates 30 shown in FIG. 3 and the heat transfer plates 36 shown in FIG. Heat transfer plate 3
On the heat transfer surfaces 0 and 36, ridges 31 and 37 in which concave portions and convex portions are continuous in the vertical direction toward FIG. Then, as shown in FIGS. 3 (a) and 3 (b), the directions of the ridges 31 and 37 in the shape of a square are opposite to each other.
The heat transfer plates 30 and the heat transfer plates 36 are alternately stacked.

The openings 32, 33, 34, and 35 through which the first and second media flowing in the high-temperature solution heat exchanger and the low-temperature solution heat exchanger flow in and out of the heat transfer plate 30 respectively. , And the openings 38, 39, 40, 41 are provided in the heat transfer plate 36. Further, on the heat transfer surface, ridges 31 and 3 in which concave portions and convex portions are continuous in the vertical direction toward FIG.
7 is formed in, for example, a U-shape, and the ridges 31 and 37 are arranged so that the directions of the U-shape are reversed.

Next, the structure of the heat exchanger using the heat transfer plate of FIG. 3 and the flow path of the two media flowing in the heat exchanger will be described with reference to FIGS. In the heat exchanger shown in FIG. 4, a heat exchanger 45 in which the heat transfer plates 30 and the heat transfer plates 36 shown in FIG. First medium a flowing in heat exchanger 45
Flows from one pipe joint (not shown) provided in the can body 42 and flows out from the pipe joint 44. The second medium b is
It flows in from a pipe joint 43 provided on the can body 42 and flows out from the other pipe joint (not shown).

FIG. 5 shows the flow path of the first medium a and the second medium b in the heat exchanger 45. The first medium a is transferred to the opening 32 of the heat transfer plate 30 in the inflow direction. Heat plate 3
6, the second medium b forms a flow path between the heat transfer plate 36 and the heat transfer plate 30 in the inflow direction, so that the first medium a and the second medium b Heat transfer plate 3
Heat exchange is performed via the heat transfer plate 36 and the heat transfer plate 36.

The heat transfer plates 30, 36 shown in FIG.
The shape of the heat transfer surface is not limited to this.
1 and 37 meander like the ridge 25 in FIG.
There is no particular problem even if the number, angle, and direction of the meandering ridge 25 are changed.

The construction of an absorption chiller / heater employing the above plate heat exchanger will be described with reference to FIG. FIG. 6 is a system diagram of an absorption chiller / heater employing a plate heat exchanger according to an embodiment of the present invention. In the absorption chiller / heater shown in FIG. 6, the plate heat exchanger 20 shown in FIG. 2 is provided in the heat exchanger elements of the low temperature regenerator, condenser, evaporator and absorber, and the high temperature solution heat exchanger and the low temperature solution heat are used. The exchanger is provided with a plate heat exchanger in which heat transfer plates 31 and 36 shown in FIG. 3 are alternately stacked.

The absorption chiller / heater shown in FIG. 6 includes a high-temperature regenerator 1, a low-temperature regenerator 2, a condenser 3, an evaporator 4, an absorber 5, a low-temperature solution heat exchanger 6, a high-temperature solution heat exchanger 7, a solution It comprises a pump 8, an eliminator 9, and a cooling / heating switching valve 10, and the operation of the cooling operation and the heating operation is basically the same as the cycle system of the absorption chiller / heater shown in FIG. As shown in FIG. 6, low temperature regenerator 2, condenser 3, evaporator 4,
Each heat exchanger element of the absorber 5 is equipped with a plate heat exchanger 2a, 3a, 4a, 5a (hereinafter referred to as a first plate heat exchanger) as shown in FIG. The low-temperature solution heat exchanger 6 is provided with plate heat exchangers 7a and 6a (hereinafter referred to as a second plate heat exchanger) in which heat transfer plates 30 and 36 are alternately stacked as shown in FIG. , Each of which can realize significant miniaturization.

Next, referring to FIGS. 7 and 8, the first plate heat exchanger employed in the low-temperature regenerator 2, the condenser 3, the evaporator 4, the absorber 5 shown in FIG. An embodiment of a method of arranging the second plate heat exchanger employed in the heat exchanger 7 and the low-temperature solution heat exchanger 6 will be described. FIG. 7 is an explanatory view showing the direction in which the panels constituting the plate heat exchanger in this embodiment are arranged side by side and the direction in which the heat transfer plates are stacked. FIG. 8 is a plan view of FIG. 7 as viewed from above.

FIGS. 7 and 8 are explanatory views showing a transparent view of the inside of a can in which each device is located. Absorption chiller / heater
The can bodies 50, 51, and 52 are formed, and the plate heat exchanger 3a of the condenser 3 and the plate heat exchanger 2a of the low-temperature regenerator 2 shown in FIG. The plate heat exchanger 4a of the evaporator 4 and the plate heat exchanger 5a of the absorber 5 shown in FIG. 6 are mounted on the can 51, and the plate 52 of the high-temperature solution heat exchanger 7 is further mounted on the lower can 52. The heat exchanger 7a and the plate heat exchanger 6a of the low-temperature solution heat exchanger 6 are mounted.

As shown in FIGS. 7 and 8, the plate heat exchangers 3a and 2a in the can body 50, the plate heat exchangers 4a and 5a in the can body 51, and the plate heat exchanger 7 in the can body 52 are provided.
a, 6a are the directions in which the panels 21 of FIG. 1 constituting each plate heat exchanger are arranged side by side, and the heat transfer plates 30, 3 of FIG.
6 are arranged in the same direction. Thereby, when the absorption chiller / heater is configured in series according to the refrigerating capacity, the cans 50 and 51 have, for example, one of the panels 21.
Assuming that the refrigerating capacity of each piece is 3.5 kW, the refrigerating capacity is 350
By increasing or decreasing the number of panels 21 to 100 units at kW and 50 units at 175 kW, a series configuration becomes possible.
The absorption chiller / heater can be configured by changing the dimensions of the can bodies 50 and 51, particularly in the direction in which they are juxtaposed, in accordance with the number of units.

Further, also in the can body 52, if the number of the heat transfer plates 30 and 36 is increased or decreased when the series is configured according to the refrigerating capacity, a series configuration can be realized. By changing the size of the body 52, particularly in the direction in which the bodies 52 are stacked, the absorption chiller / heater can be configured, so that the design can be easily changed depending on the refrigeration capacity.

FIG. 9 is a piping diagram of cold and hot water and cooling water when two absorption chiller / heaters having different refrigeration capacities are installed. That is, FIG. 9 shows a cooling / heating water piping system from the absorption cooling / heating water heater to the use side and a cooling water piping system from the absorption cooling / heating water heater when two absorption cooling / water heating machines having different refrigeration capacities are installed. This is an embodiment for explaining the effects of the present invention.

The embodiment shown in FIG. 9 shows the absorption chiller / heaters 60 and 61 having different refrigerating capacities, the opening / closing valves 62 and 64 of the absorption chiller / heater 60 in the chilled / hot water piping system, and the opening / closing valve 63 of the absorption chiller / heater 61. , 65, a chilled / hot water circulation pump 66, on / off valves 67, 69 of an absorption chiller / heater 60 in a cooling water piping system, on / off valves 68, 70 of an absorption chiller / heater 61, and a cooling water circulation pump 7.
2 and a cooling tower 71.

As shown in FIG. 9, when two absorption chiller / heaters 60 and 61 having different refrigerating capacities are installed, the length and number of the tubes are different in the conventional pipe system.
Since the pressure loss of the cold / hot water side and the cooling water side of 61 is different, for example, the open / close valves 64 and 65 of the cold / hot water side and the open / close valves 69 and 70 of the cool water side are fully opened, and the open / close valves 62 and 6 of the cold / hot water side.
3. If the cooling chiller / heater 61 is installed fully open without adjusting the flow rate at the cooling water side on-off valves 67 and 68, the absorption chiller / heater 61 has a larger flow rate than the rated flow when the pressure loss is larger. If the flow rate is too small, the capacity becomes insufficient, and the absorption chiller / heater 60 has a problem that the flow rate is too large and the corrosion of the pipe is promoted. Therefore, at the time of installation, the on-off valves 62 and 63 on the cold / hot water side and the on-off valves 6 on the cooling water side
At 7,68, the flow rate had to be adjusted without fail.

Therefore, the absorption chiller / heater 60, 61 is provided in FIG.
The plate heat exchanger 20 shown in FIG. 6 is configured as shown in the cycle flow diagram of FIG. 6, except for the cold and hot water piping in the evaporator 4 and the cooling water piping in the absorber 5 and the condenser 3. The pressure loss on the cold / hot water side and the pressure loss on the cooling water side of the absorption chiller / heater 60, 61 can be made the same. Therefore, the on-off valves 62, 6 on the cold / hot water side
3, 64, 65, on-off valves 67, 68, 69, on the cooling water side
Even if the inlet and outlet sides of the absorption water heaters 60 and 61 are not fully adjusted at the time of installation, and the pressure loss is almost the same even when installed without opening, the rated flow rate is the same as that of the conventional pipe system. There is no problem that is too small or too large.

According to the above embodiments, the low temperature regenerator 2, the condenser 3, the evaporator 4, the absorber 5, and the bag-like panel 21
Plate heat exchangers 2a, 3a, 4a,
5a, and plate heat exchangers 6a and 7a in which a plurality of heat transfer plates 30 and 36 are alternately arranged side by side in the low-temperature solution heat exchanger 6 and the high-temperature solution heat exchanger 7, respectively. By making the directions the same, it is possible to reduce the size of the absorption chiller / heater, and when a series configuration is made for each refrigeration capacity, the panel 21 and the heat transfer plates 30, 36 are set for each refrigeration capacity.
This can be achieved by increasing or decreasing the number of layers to be stacked and mainly changing the dimension in the juxtaposition direction, so that the design can be easily changed depending on the refrigeration capacity.

In each of the above embodiments, the low-temperature regenerator 2, condenser 3, evaporator 4, and absorber 5 are all provided with the first plate heat exchanger having a plurality of panels 21 arranged in parallel. And the low-temperature solution heat exchanger 6 and the high-temperature solution heat exchanger 7 are each provided with a second plate heat exchanger in which a plurality of heat transfer plates 30 and 36 are alternately stacked. , Condenser 3, evaporator 4, absorber 5 is equipped with a first plate heat exchanger, and low-temperature solution heat exchanger 6, high-temperature solution heat exchanger 7 is equipped with a second plate heat exchanger. Needless to say, even if the plate heat exchanger of the above is equipped, there is a corresponding effect.

[0039]

As described in detail above, according to the present invention, it is possible to greatly reduce the size of various heat exchanger elements constituting the absorption chiller / heater, and to form a series for each refrigeration capacity. An absorption chiller / heater using a plate heat exchanger whose design can be easily changed even in such a case can be provided.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a panel constituting a plate heat exchanger according to an embodiment of the present invention.

FIG. 2 is a side view showing a configuration of a plate heat exchanger according to one embodiment of the present invention.

FIG. 3 is a front view of a heat transfer plate according to one embodiment of the present invention.

FIG. 4 is a perspective view of a heat exchanger configured by laminating the heat transfer plates of FIG. 3;

FIG. 5 is an exploded explanatory view showing a flow of a medium in the heat exchanger of FIG.

FIG. 6 is a system diagram of an absorption chiller / heater employing a plate heat exchanger according to an embodiment of the present invention.

FIG. 7 is an explanatory diagram showing a direction in which panels constituting the plate heat exchanger according to the present embodiment are arranged side by side and a direction in which heat transfer plates are stacked.

FIG. 8 is a plan view of FIG. 7 as viewed from above.

FIG. 9 is a piping diagram of cold and hot water and cooling water when two absorption chiller / heaters having different refrigeration capacities are installed.

FIG. 10 is a cycle system diagram of a general absorption chiller / heater.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... High temperature regenerator, 2 ... Low temperature regenerator, 2a ... Plate heat exchanger of low temperature heat exchanger, 3 ... Condenser, 3a ... Condenser plate heat exchanger, 4 ... Evaporator, 4a ... Evaporator plate Heat exchanger, 5 ... absorber, 5a ... absorber plate heat exchanger, 6 ... low temperature solution heat exchanger, 6a ... low temperature solution heat exchanger plate heat exchanger, 7 ... high temperature solution heat exchanger, 7a ... Plate heat exchanger of high-temperature solution heat exchanger, 20: plate heat exchanger, 21: panel, 25: ridge, 28: inflow side header,
29: Outflow side header, 30, 36: Heat transfer plate, 3
1, 37 ... ridge, 32, 33, 34, 35, 38, 39,
40, 41 ... opening, 43, 44 ... pipe joint, 42,
50, 51, 52: Can body, 62, 63, 64, 65: On / off valve on the cold / hot water side, 67, 68, 69, 70: On / off valve on the cooling water side.

Claims (2)

[Claims] 1. At least a high-temperature regenerator, a low-temperature regenerator,
In an absorption chiller / heater in which a condenser, an evaporator, an absorber, a high-temperature solution heat exchanger, and a low-temperature solution heat exchanger are operatively connected by piping, at least one of a low-temperature regenerator, condenser, evaporator, and absorber In the two, a plurality of bag-shaped panels forming a sealed space inside the heat transfer surfaces facing each other are arranged side by side in such a manner that a predetermined gap is formed between the heat transfer surfaces of the adjacent bag-shaped panels. A flow path communicating the inner space of the bag-shaped panel is provided between the plurality of bag-shaped panels to allow the first medium to flow, and the second medium is passed through the outer space of the plurality of bag-shaped panels. Wherein the heat transfer surfaces facing each other comprise a plate heat exchanger having a heat transfer promotion surface for generating a turbulent flow inside the bag-shaped panel; and at least two of the plate heat exchangers. Is the panel that constitutes the plate heat exchanger Both the absorption chiller which is characterized in that it is arranged in the same direction. 2. At least a high-temperature regenerator, a low-temperature regenerator,
In an absorption chiller / heater in which a condenser, an evaporator, an absorber, a high-temperature solution heat exchanger, and a low-temperature solution heat exchanger are operatively connected by piping, at least one of a low-temperature regenerator, condenser, evaporator, and absorber In the two, a plurality of bag-like panels forming a sealed space inside the heat transfer surfaces facing each other are arranged side by side in such a manner that a predetermined gap is formed between the heat transfer surfaces of the adjacent bag-like panels. A flow path communicating the inner space of the bag-shaped panel is provided between the plurality of bag-shaped panels to allow the first medium to flow, and the second medium is passed through the outer space of the plurality of bag-shaped panels. The heat transfer surfaces facing each other are constituted by a first plate heat exchanger having a heat transfer promoting surface for generating a turbulent flow inside the bag-shaped panel. , At least one of the low-temperature solution heat exchangers includes a plurality of medium flow pipes. A plurality of heat transfer plates are laminated, and the heat transfer surface of the heat transfer plate is formed by forming a large number of curved ridges in which a concave portion and a convex portion are continuous. A second channel in which the first medium and the second medium are alternately circulated for each of the plurality of stacked heat transfer plates, the channels being stacked so that the directions of the bends are respectively reversed. At least two of the first plate heat exchangers, wherein the panels constituting the plate heat exchangers are all arranged side by side in the same direction, and the second plate heat exchange An absorption chiller / heater, wherein the heat transfer plates constituting the heat exchanger are arranged so as to be stacked in the same direction as the direction in which the panels of the first plate heat exchanger are juxtaposed.