JP5004645B2 - Refrigeration air conditioner - Google Patents

Description

  The present invention relates to a refrigeration air conditioner, and more particularly to a refrigeration air conditioner including a plurality of water heat exchangers.

In recent years, refrigeration air conditioners (same as “chiller” and “refrigeration device”) use a method of enlarging an evaporator / condenser constituting a refrigeration cycle for the purpose of improving the efficiency of the refrigeration cycle. In addition, a plate-type heat exchanger is adopted as the water heat exchanger to save space in the refrigeration air conditioner.
Furthermore, a refrigerating apparatus is disclosed in which two water heat exchangers are arranged to increase the heat transfer area of the evaporator (see, for example, Patent Document 1).
Japanese Patent Laying-Open No. 2005-337688 (page 6, FIG. 9)

The refrigeration apparatus disclosed in Patent Document 1 arranges an uppermost plate heat exchanger and a rear plate heat exchanger in a horizontal direction in a lower part of a housing, and includes a plate heat exchanger. In this case, a refrigerant having cold heat flows in from near the bottom surface of the box and flows out from near the top surface of the box, while a heat medium (for example, water) on the load side flows from near the top surface of the box. It flows out from the lower surface side of the heat exchanger, and during this time, cold heat is transferred and the heat medium on the load side is cooled.
Similarly, a refrigerant having warm heat flows in from near the top surface of the box and flows out from near the bottom surface of the box, while a heat medium (for example, water) on the load side flows from near the bottom surface of the box and flows into the box. It flows out from near the upper surface of the body, and during this time, heat is transferred and the heat medium on the load side is heated.

Therefore, when the plate heat exchangers are arranged side by side, the water outlet (or water inlet) provided near the upper surface of one plate heat exchanger and the lower surface of the other plate heat exchanger are provided. There was a need to communicate with the designated water inlet (or water outlet).
That is, there is a problem that the connection pipe for such communication needs to be arranged in “task” (see FIG. 7), and the pipe length of the connection pipe becomes long.

  In addition, since it is necessary to connect a load side pipe to the inlet water pipe and the outlet water pipe forming the water inlet and the water outlet, respectively, if a space for arranging the connecting pipe is provided in the apparatus There is a problem that the length of the inlet water pipe and the outlet water pipe needs to be increased, the apparatus size is increased, and the apparatus weight is increased.

  The present invention has been made to solve the above-described problems, and while having a plurality of water heat exchangers, it is possible to shorten the length of the connecting pipes connecting them and to save the space for arranging the connecting pipes. An object of the present invention is to provide a refrigeration air conditioner capable of

A refrigerating and air-conditioning apparatus according to the present invention comprises a first water heat exchanger and a second water heat exchanger that constitute a refrigeration cycle and deliver cold energy to a passing refrigerant and a passing heat medium,
With the first water heat exchanger up and the second water heat exchanger down, the first water heat exchanger and the second water heat exchanger are vertically installed in the vertical direction ,
A first front side heat medium inlet / outlet is provided for the heat medium to flow in and out near the upper surface in front of the first water heat exchanger, and the heat medium flows in and out toward the lower surface on the rear surface of the first water heat exchanger. A first back side heat medium inlet / outlet is provided, and a refrigerant inlet and a refrigerant outlet for inflow and outflow of refrigerant are provided on the back side of the first water heat exchanger,
A second back side heat medium inlet / outlet is provided for the heat medium to flow in and out near the upper surface on the back surface of the second water heat exchanger, and the heat medium flows in and out near the lower surface on the front surface of the second water heat exchanger. A second front-side heat medium inlet / outlet is provided, and a refrigerant inlet and a refrigerant outlet for inflow / outflow of the refrigerant are provided on the rear surface of the second water heat exchanger,
The first back-side heat medium inlet / outlet and the second back-side heat medium inlet / outlet communicate with each other through a connection pipe, and only the pipe forming the first front-side heat medium inlet / outlet from the front of the first water heat exchanger. It protrudes and only the piping which forms said 2nd front side heat-medium inlet / outlet protrudes from the front of said 2nd water heat exchanger, It is characterized by the above-mentioned.

  Therefore, by vertically installing the first water heat exchanger and the second water heat exchanger vertically, the length of the connection pipe can be shortened and space saving can be achieved.

[Embodiment 1]
(Refrigeration air conditioner)
1 is a perspective view schematically showing a refrigerating and air-conditioning apparatus according to Embodiment 1 of the present invention.
In FIG. 1A, a refrigeration air conditioner (hereinafter referred to as “refrigeration device”) 100 includes a heat exchange unit 19 in which a propeller fan 18 and the like are disposed, a first water heat exchanger 11 and a second water heat. The machine room unit 20 is provided with an exchanger 12 (hereinafter, sometimes collectively referred to as a “water heat exchanger”) and the like. At this time, the first water heat exchanger 11 is disposed so as to overlap above the second water heat exchanger 12, and the compressor 32 is disposed above the first water heat exchanger 11.
In FIG. 1B, the refrigeration air conditioner 200 includes a heat exchange unit 19 in which a propeller fan 18 and the like are arranged, a machine room in which the first water heat exchanger 11 and the second water heat exchanger 12 and the like are arranged. And a unit 20. At this time, the first water heat exchanger 11 is disposed so as to overlap the second water heat exchanger 12, and the compressor 32 is disposed side by side with the second water heat exchanger 12.
Therefore, since the water heat exchanger is arranged vertically, the projected area required for the arrangement is halved compared to the case where the water heat exchanger is arranged horizontally. Similarly, the area of the drain receiver 23 is also halved. The contents common to the refrigerating and air-conditioning apparatus 100 and the refrigerating and air-conditioning apparatus 200 will be described below as a representative of the refrigerating and air-conditioning apparatus 100.

(Water heat exchanger)
In FIGS. 1A and 1B, when supplying cold energy to a load side device (not shown), water having cold energy (hereinafter referred to as “cold water”) is sent out from the second water heat exchanger 12. Then, the cold water delivered to the load side device returns to the first water heat exchanger 11.
At this time, the feed pipe (not shown) is connected to an outlet flange 17 provided in the second water heat exchanger 12, and the return water pipe (not shown) is an inlet flange 16 provided in the first water heat exchanger 11. Connected to.

(Water circuit)
2 and 3 schematically illustrate the water circuit of the refrigeration apparatus shown in FIG. 1. FIG. 2 (a) is a plan view, FIG. 2 (b) is a side view, and FIG. FIG. 3A is a front view, and FIG. 3B is a rear view.
2 and 3, the water circuit includes a first water heat exchanger 11, a second water heat exchanger 12, and a water heat exchanger connection water pipe (hereinafter referred to as “connection pipe”) that connects the two. 15, an inlet flange 16 to which a return water pipe (not shown) is connected, and an outlet flange 17 to which a feed water pipe (not shown) is connected.

  That is, water (hereinafter referred to as “cold water”) as a heat medium flows out to a feed water pipe (not shown) connected to the outlet flange 17 (indicated by an arrow A3 in the figure) and passes through this. To the load side device (not shown), and further flows into the first water heat exchanger 11 through the return water pipe (not shown) from the inlet flange 16 to which it is connected (arrow A1 in the figure). ). And after receiving cold heat in the 1st water heat exchanger 11, it passes through the connection piping 15 (indicated by arrow A2 in the figure), and returns to the first water heat exchanger 11 for circulation.

At this time, the 1st water heat exchanger 11 is installed above the 2nd water heat exchanger 12, and is set up vertically. Accordingly, the outlet portion disposed near the lower surface of the first water heat exchanger 11 and the inlet portion disposed near the upper surface of the second water heat exchanger 12 have the shortest distance. The length can be minimized.
That is, as the connection pipe 15 is shortened, the arrangement space can be reduced, so that the refrigeration apparatus 100 can be reduced in size and the pressure loss of the water circuit in the apparatus can be reduced. The pump power on the load side can be reduced. In addition, the weight of the refrigeration apparatus 100 can be reduced as the connection pipe 15 is lightened. Therefore, the cost of the refrigeration apparatus 100 itself can be reduced, and the cost of a refrigeration system including the refrigeration apparatus 100 and a load side device (not shown) can be reduced.

Further, the water inlet portion (closer to the upper surface) of the first water heat exchanger 11 is provided on the front surface, and the water outlet portion (lower surface portion) is provided on the opposite surface, respectively. A water inlet (near the upper surface) is provided on the front surface, and a water outlet (near the lower surface) is provided on the rear surface, on the opposite surface.
For this reason, the connection pipe 15 is installed on the back side, the inlet flange 16 and the outlet flange 17 which are load side connection portions are arranged on the front side, and there is no connection pipe 15 on the front side. , Indicated by a one-dot chain line) can be brought close to the front of the first water heat exchanger 11 and the second water heat exchanger 12. Accordingly, this also saves space in the machine room unit, and promotes downsizing of the refrigeration apparatus 100.

  Note that the names of the inlet flange 16 and the outlet flange 17 are for convenience of explanation when the refrigeration apparatus 100 supplies cold heat. That is, when the refrigeration apparatus 100 supplies warm heat, water (hot water) as a heat medium circulates in the direction opposite to the above, so the warm water is sent from the inlet flange 16 toward the load side apparatus, It will return from the outlet flange 17.

(Refrigerant circuit)
2 and 3, the refrigeration air conditioner 100 includes a compressor 32 constituting a refrigeration cycle, an air heat exchanger (not shown) opposed to the propeller fan 18, an expansion means (not shown), 1st water heat exchanger 11, 2nd water heat exchanger 12, refrigerant piping (not shown) which constitutes a refrigerant circuit, and four-way valve which reverses the direction in which a refrigerant flows (same as four-way switching valve, not shown) And are installed.
When the refrigeration air conditioner 100 supplies cold heat, the cold refrigerant flows into the first water heat exchanger 11 from the refrigerant inlet 28 provided near the lower surface of the first water heat exchanger 11. Then, after the cold heat is transferred to the cold water as the heat medium, it flows out from the refrigerant outlet 27 provided near the upper surface. The same applies to the second water heat exchanger 12.
On the other hand, when the refrigerating and air-conditioning apparatus 100 supplies hot heat, the hot refrigerant flows in the direction opposite to that described above, and therefore flows in through the refrigerant outlet 27 and out of the refrigerant inlet 28.

In the present invention, the first water heat exchanger 11 and the second water heat exchanger 12 are not limited to those arranged in parallel with respect to the refrigerant, but the first water heat exchanger 11 and the second water heat. The exchanger 12 may be arranged in series with respect to the refrigerant.
At this time, a communication pipe that connects the refrigerant outlet 27 of the second water heat exchanger 12 and the refrigerant inlet 28 of the first water heat exchanger 11 is installed, and the refrigerant having cold heat is first a refrigerant inlet 28 near the lower surface. After flowing into the second water heat exchanger 12, it flows into the first water heat exchanger 11 through the communication pipe and flows out from the refrigerant outlet 27 near the upper surface. Similarly, the refrigerant having warm heat flows in the opposite direction.
Furthermore, a four-way valve (not shown) may be removed, and the refrigeration air conditioner 100 (the same applies to the refrigeration air conditioner 200) may be specialized for either dedicated cold supply or dedicated heat supply.
Moreover, although what uses "water" as a heat medium is shown, this invention is not limited to this, For example, gas, a slurry, etc. may be sufficient.

[Embodiment 2]
FIG. 4 schematically shows a water heat exchanger in a refrigerating and air-conditioning apparatus according to Embodiment 2 of the present invention, where (a) is a front view, (b) is a side view, and (c) is a rear view. It is. In addition, the same code | symbol is attached | subjected to the part which is the same as that of Embodiment 1, or an equivalent part, and one part description is abbreviate | omitted.
In FIG. 4, a mounting member 24 is disposed between the first water heat exchanger 11 and the second water heat exchanger 12, and the first water heat exchanger 11 is connected to the second water heat via the mounting member 24. It is installed in the heat exchanger 12. Further, support members 30 are installed on the front surface and the back surface of the second water heat exchanger 12.
The upper part of the support member 30 reaches the first water heat exchanger 11, and the front and back surfaces of the first water heat exchanger 11 are installed on the support member 30.
Therefore, the vertically installed first water heat exchanger 11 is firmly supported by the second water heat exchanger 12 and the support member 30.

[Embodiment 3]
5 and 6 schematically illustrate a refrigerating and air-conditioning apparatus according to Embodiment 3 of the present invention. FIG. 5 is a perspective view, FIG. 6 (a) is a front view, and FIG. 6 (b) is a side view. FIG. 4C is a rear view. In addition, the same code | symbol is attached | subjected to the part which is the same as that of Embodiment 1, or an equivalent part, and one part description is abbreviate | omitted.
5 and 6, a third water heat exchanger 21 is added to the refrigeration air conditioner 300 between the first water heat exchanger 11 and the second water heat exchanger 12, and each of them is vertically installed vertically. (Hereinafter, collectively referred to as “water heat exchanger”). That is, it corresponds to a structure in which the third water heat exchanger 21 is added to the refrigeration air conditioner 100 (or the refrigeration air conditioner 200) shown in the first embodiment.
At this time, since the three water heat exchangers are arranged vertically, the projected area required for the arrangement is reduced to about ３ as compared to the case where they are arranged horizontally. Similarly, the area of the drain receiver is also greatly reduced.

In addition, on the back surface of the third water heat exchanger 21, an inlet portion into which cold water flows is provided near the upper surface, and an outlet portion from which cold water flows out is provided near the lower surface.
The outlet portion of the first water heat exchanger 11 and the inlet portion of the third water heat exchanger 21 communicate with each other through the connection pipe 15, and the outlet portion of the third water heat exchanger 21 and the second water heat exchanger 121. Are connected to each other by a connecting pipe 22.
Therefore, as with the refrigeration air conditioner 100 (or refrigeration air conditioner 200) shown in the first embodiment, the weight of the refrigeration apparatus 300 can be reduced as the connection pipe 22 becomes lighter. The cost can be reduced, and the cost of a refrigeration system including the refrigeration apparatus 300 and a load side apparatus (not shown) can be reduced.
Furthermore, since both the connection pipe 15 and the connection pipe 22 are installed on the back surface, it becomes possible to bring the “panel surface (indicated by a one-dot chain line in the figure)” closer to the front surface of the heat exchanger, Space saving of the unit is achieved, and downsizing of the refrigeration apparatus 300 is promoted.

[Conventional form]
FIG. 7 schematically shows a conventional refrigerating and air-conditioning apparatus for reference, in which (a) is a plan view, (b) is a front view, and (c) is a side view. In addition, the same code | symbol is attached | subjected to the same part as Embodiment 1, or a corresponding part.
In FIG. 7, a refrigeration air conditioner 900 includes a first water heat exchanger 11 and a second water heat exchanger 12 installed side by side in parallel, and a water inlet portion (upper surface) of the first water heat exchanger 11 and All the water outlets (near the lower surface) are arranged in front, and the water inlet part (near the upper surface) and the water outlet (near the lower surface) of the second water heat exchanger 12 are similarly arranged in the front.
For this reason, since the connection pipe 15 is installed on the front side in “task rack”, the connection pipe 15 is longer than those in the first and second embodiments, and the panel surface covering the connection pipe 15 is equal to this installation space. It is arranged to protrude only to the front side.
That is, as described above, the refrigerating and air-conditioning apparatus 900 includes the long connection pipe 15, a wide space due to the horizontal arrangement of the water heat exchanger, and a wide space due to the panel surface protruding to the front side. Became large and the manufacturing cost was high.

  As described above, since the refrigeration air conditioner of the present invention can be downsized and the manufacturing cost can be reduced, it can be widely used as various refrigeration air conditioners.

1 is a perspective view schematically showing a refrigeration air conditioner according to Embodiment 1 of the present invention. The top view and side view which explain typically the water circuit of the freezing apparatus shown in FIG. The front view and rear view which explain typically the water circuit of the freezing apparatus shown in FIG. The front view, side view, and rear view which show typically the water heat exchanger in the refrigerating air-conditioning apparatus which concerns on Embodiment 2 of this invention. The perspective view which illustrates typically the refrigerating air conditioning apparatus which concerns on Embodiment 3 of this invention. FIG. 6 is a front view, a side view, and a rear view schematically illustrating a water heat exchanger in the refrigeration air conditioner shown in FIG. 5. The top view, front view, and side view which show the conventional refrigeration air conditioner typically.

Explanation of symbols

  11: 1st water heat exchanger, 12: 2nd water heat exchanger, 15: Connection piping, 16: Inlet flange, 17: Outlet flange, 18: Propeller fan, 19: Heat exchange unit, 20: Machine room unit, 21: Third water heat exchanger, 22: Connection pipe, 23: Drain receiver, 24: Mounting member, 27: Refrigerant outlet, 28: Refrigerant inlet, 30: Support member, 32: Compressor, 100: Refrigeration system ( Refrigeration air conditioner), 200: refrigeration apparatus (refrigeration air conditioner), 300: refrigeration apparatus (refrigeration air conditioner).

Claims (4)

Comprising a first water heat exchanger and a second water heat exchanger that constitute a refrigeration cycle and deliver cold heat to a refrigerant passing therethrough and a heat medium passing therethrough,
With the first water heat exchanger up and the second water heat exchanger down, the first water heat exchanger and the second water heat exchanger are vertically installed in the vertical direction ,
A first front side heat medium inlet / outlet is provided for the heat medium to flow in and out near the upper surface in front of the first water heat exchanger, and the heat medium flows in and out toward the lower surface on the rear surface of the first water heat exchanger. A first back side heat medium inlet / outlet is provided, and a refrigerant inlet and a refrigerant outlet for inflow and outflow of refrigerant are provided on the back side of the first water heat exchanger,
A second back side heat medium inlet / outlet is provided for the heat medium to flow in and out near the upper surface on the back surface of the second water heat exchanger, and the heat medium flows in and out near the lower surface on the front surface of the second water heat exchanger. A second front-side heat medium inlet / outlet is provided, and a refrigerant inlet and a refrigerant outlet for inflow / outflow of the refrigerant are provided on the rear surface of the second water heat exchanger,
The first back-side heat medium inlet / outlet and the second back-side heat medium inlet / outlet communicate with each other through a connection pipe, and only the pipe forming the first front-side heat medium inlet / outlet from the front of the first water heat exchanger. A refrigerating and air-conditioning apparatus characterized in that only a pipe that protrudes and forms the second front-side heat medium inlet / outlet protrudes from the front of the second water heat exchanger . Constituting a refrigeration cycle, having a first water heat exchanger, a second water heat exchanger, and a third water heat exchanger that transfer cold energy to a passing refrigerant and a passing heat medium;
With the first water heat exchanger up, the third water heat exchanger in the middle, and the second water heat exchanger down, the first water heat exchanger and the third water heat exchanger The second water heat exchanger is vertically installed in the vertical direction ,
A first front side heat medium inlet / outlet is provided for the heat medium to flow in and out near the upper surface in front of the first water heat exchanger, and the heat medium flows in and out toward the lower surface on the rear surface of the first water heat exchanger. A first back side heat medium inlet / outlet is provided, and a refrigerant inlet and a refrigerant outlet for inflow and outflow of refrigerant are provided on the back side of the first water heat exchanger,
A third rear-side upper heat medium inlet / outlet is provided for the heat medium to flow in and out near the upper surface at the back of the third water heat exchanger, and the heat medium flows into the lower surface near the lower surface of the third water heat exchanger. A third rear side lower heat medium inlet / outlet for discharging, and a refrigerant inlet and a refrigerant outlet for inflow and outflow of refrigerant on the back side of the third water heat exchanger,
A second back side heat medium inlet / outlet is provided for the heat medium to flow in and out near the upper surface on the back surface of the second water heat exchanger, and the heat medium flows in and out near the lower surface on the front surface of the second water heat exchanger. A second front-side heat medium inlet / outlet is provided, and a refrigerant inlet and a refrigerant outlet for inflow / outflow of the refrigerant are provided on the rear surface of the second water heat exchanger,
The first back side heat medium inlet / outlet and the third back side upper heat medium inlet / outlet, and the third back side lower heat medium inlet / outlet and the second back side heat medium inlet / outlet communicate with each other through connection pipes, respectively. From the front of the first water heat exchanger, only the piping that forms the first front-side heat medium inlet / outlet protrudes, and there is nothing protruding from the front of the third water heat exchanger, the second water heat exchange. vessels of refrigeration air conditioner you wherein only the pipe forming the second front-side heat medium entrance is projected from the front. The connection pipe is arranged substantially parallel to a vertical plane, the refrigerating and air-conditioning apparatus according to claim 1 or 2, wherein it is a circular arc shape or a U-shape in a side view. A first flange is provided in a pipe forming the first front side heat medium inlet / outlet port,
A second flange is provided on the pipe forming the second front side heat medium inlet / outlet;
A panel surface is disposed between the first flange and the front surface of the first water heat exchanger, and between the second flange and the front surface of the second water heat exchanger. Item 4. The refrigeration air conditioner according to any one of Items 1 to 3 .

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