JPH08210667A - Water heat source air conditioning device - Google Patents

Abstract

PURPOSE: To make it possible to change the connection direction of a water pipeline to comply with requirements with regards to water heat equipment for a water heat source air conditioning device. CONSTITUTION: With regards to heat source equipment 4 for a water heat source air conditioning device which is provided with a heat exchanger unit 9 and a refrigerator unit 8 in a casing 14 and designed to feed water at a specified temperature from a water heat source unit by way of a water pipeline 5 and heat-exchange between water and refrigerant in a heat exchanger unit, there are installed connectors 16a and 18a at a plurality of locations, which are capable of connecting the water pipeline to a water inlet header 16 and a water outlet pipeline which are connected to the heat exchanger unit 9 in the casing 14. This construction makes it possible to change the connection direction of the water pipeline 5 selectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses water supplied from a water heat source unit as a heat source, and in a heat exchange unit, heat is exchanged between water and a refrigerant to condense or evaporate the refrigerant, and The present invention relates to a water heat source air conditioner that performs air conditioning, and more particularly, to an improvement in a disposition state of a water supply / drain pipe that connects a water heat source unit and a heat exchange unit.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Patent Laid-Open No. 6-34172 is known.
As an example of the air conditioner disclosed in Japanese Patent Publication No. 1 (1994), a device that uses water as a heat source is known. In this type of air conditioner, a water heat source unit such as a boiler and a cooling tower installed outdoors, and a heat exchange unit installed indoors are connected by a water pipe, while an indoor unit installed indoors. And a refrigerator unit including a compressor, a pressure reducing mechanism, and the like are connected by a refrigerant pipe. In the heat exchange unit, heat is exchanged between the water supplied from the water heat source unit and the refrigerant flowing through the refrigerant pipe.

With this configuration, during cooling operation,
Chilled water from the cooling tower of the water heat source unit and discharge refrigerant from the compressor of the refrigerator unit are both supplied to the heat exchange unit, and heat is exchanged between them to condense the refrigerant, and then the refrigerant is transferred to the indoor unit. It is supplied in the opposite direction and evaporated in this indoor unit. On the other hand, during the heating operation, the hot water from the boiler of the water heat source unit and the liquid refrigerant discharged from the compressor and condensed in the indoor unit are both supplied to the heat exchange unit, and heat is exchanged between them to evaporate the refrigerant. After letting
The refrigerant is collected in the compressor.

Further, conventionally, in an air conditioner of this type, the heat exchange unit and the refrigerator unit are generally housed in the same casing and configured as a heat source unit. Connection pipes extending from the upstream end and the downstream end are opened toward the casing back surface, and a water pipe extending from the water heat source unit to the connection pipe is connected to the connection pipe from the casing back surface side.

[0005]

By the way, when the heat source device as described above is installed in a room such as a machine room, the connecting direction of the water pipe is not limited to the back side of the casing depending on the disposition state. There is a request to set the direction. For example, if there is a restriction on the installation space of the heat source unit, there may be a request to connect the water pipe from the top plate side of the casing, or from the side of the casing in terms of connection workability. There is.

However, in the conventional structure, the connecting direction of the water pipe is set to one direction, and it has not been possible to meet the above-mentioned demand.

The present invention has been made in view of this point, and an object of the present invention is to make it possible to change the connection direction of water pipes for a heat source unit of such a water heat source air conditioner as required. And

[0008]

In order to achieve the above object, the present invention can change the connecting direction of the water pipe by providing a plurality of connecting portions on the pipe inside the casing.

Specifically, the invention according to claim 1 is, as shown in FIGS. 1 and 2, a use side unit installed in a room.
(6), a refrigerant circulation unit (8) for circulating a refrigerant between the use side unit (6), a water heat source means (3) for generating water at a predetermined temperature, and the water heat source means (3) Is connected by a water supply / drainage pipe (12) to exchange heat between the water received from the water heat source means (3) and the refrigerant circulating between the refrigerant circulation unit (8) and the use side unit (6). It is premised on a water heat source air conditioner provided with a heat exchange unit (9) for condensing or evaporating the refrigerant. Then, the heat exchange unit (9) is housed in the casing (14), and the water supply / drainage pipe (12) is connected to the heat exchange unit (9) in the casing (14). And a water pipe extending from the water heat source means (3)
(5) It is equipped with and. Further, in the portion of the connecting pipe (16, 18) located in the casing (14), the water pipe (5)
The connection parts (16a, 18a) that can be connected to each other are provided at a plurality of positions.

The invention according to claim 2 is, in the water heat source air conditioner according to claim 1, in the connecting portions (16a, 18a),
A pipe part (16b, 18b) extending in a direction orthogonal to the extension direction of the connecting pipe (16, 18) is provided, and each pipe part (16b, 18b) other than the one to which the water pipe (5) is connected The closing plug (P1, P2)
It has a closed structure.

According to a third aspect of the present invention, in the water heat source air conditioner according to the first or second aspect, the connecting pipe (16,1) is provided.
The tip of 8) is openable so that the water pipe (5) can be connected.

The invention according to claim 4 is the above-mentioned claim 1, 2
Or the water heat source air conditioner described in 3, the connecting pipe (1
6,18) with a pair of pipes facing each other in parallel,
Connection parts provided in the direction in which the pipes face each other
The configuration is set to be different from the connection direction of the water pipe (5) to (16a, 18a).

According to a fifth aspect of the present invention, in the water heat source air conditioner according to the second aspect, a knock hole that can be opened is provided at a position corresponding to the pipe portion (16b, 18b) in the casing (14). I am trying.

[0014]

With the above construction, the present invention provides the following actions. According to the invention of claim 1, when the air conditioner is in operation, the water having the predetermined temperature supplied from the water heat source means (3) to the heat exchange unit (9) and the refrigerant circulation unit.
The refrigerant circulating between the (8) and the use side unit (6) is heat exchanged in the heat exchange unit (9), whereby the refrigerant is condensed or evaporated, and the heat exchange unit (9) and the use side unit. Heat is transferred between (6) and air conditioning in the room. When installing this air conditioner, the connecting pipe (16, 16) connected to the heat exchange unit (9)
The water pipe (5) will be connected to the water pipe (18), but since the connection pipes (16, 18) are provided with a plurality of connection parts (16a, 18a), the heat exchange unit ( Connection is possible from the direction required by the arrangement state of 9). That is,
The connection direction of the water pipe (5) to the connection pipes (16, 18) can be selectively set.

According to the second aspect of the present invention, each tube portion (16b, 18)
Since all of b) except the one to which the water pipe (5) is connected are closed by the closure plugs (P1, P2), such pipe parts (16
Even if a large number of b, 18b) are provided, water will not leak from the connecting pipes (16, 18).

In the third aspect of the invention, the water pipe (5) can be connected to the tip of the connecting pipe (16, 18).

In the invention according to claim 4, each connecting pipe (16, 1)
8) When connecting the water pipes (5) to each other, the pipes (16, 18) are arranged side by side in the connection direction of the water pipes (5) and the water pipe (5) and the connection pipe (16 , 18) can be avoided. In other words, when connecting the water pipe (5) to each connecting pipe (16,18) respectively,
It is possible to avoid a situation in which another connection pipe (18) is located in the connection direction of the connection pipe (16) of (5) and this connection work is hindered, and the connection work between the pipes can be performed well.

According to the invention of claim 5, when connecting the water pipe (5), the pipe portion (16b, 18b) to which the water pipe (5) is connected is connected.
The knock hole provided corresponding to is opened. Thus, the work of inserting the water pipe (5) into the casing (14) and connecting it to the pipe portions (16b, 18b) can be favorably performed.

[0019]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 shows a system diagram of a water heat source air conditioner according to this example. As shown in FIG. 1, the water heat source air conditioner is a boiler installed outside (on the roof of a building, etc.).
A water heat source unit (3) as a water heat source means consisting of (1) and a cooling tower (2), and a plurality of heat source units (4, 4, ...) installed in a plurality of rooms, respectively, form an above-ceiling space. Each of the heat source units (4, 4, ...) is connected to the other by water pipes (5) that extend, and multiple indoor units are used as units on the use side.
The refrigerant pipes (7) extending through the space above the ceiling are connected to (6, 6, ...), respectively.

As shown in FIG. 2, the heat source unit (4) includes a refrigerator unit (8) as a refrigerant circulation unit having a compressor (8a, 8a), an expansion valve (8b), etc. A heat exchange unit (9) having a heat exchanger (10) and an auxiliary heat exchanger (11) for exchanging heat between water and the refrigerant and condensing or evaporating the refrigerant depending on the air conditioning operation state is provided. There is.

That is, the boiler (1) and the cooling tower
(2) The heat exchanger (10) of the heat exchange unit (9) and the auxiliary heat exchanger (11) are water pipes (5a) and water recovery pipes (5b). Circulation of water as a heat source is possible by piping (5), and each refrigerator unit (8,
, 8) and the indoor units (6, 6, ...) Are connected by a refrigerant pipe (7) so that the refrigerant can circulate.

Each of the indoor units (6, 6, ...) Is so-called cooling / heating-free that can individually switch between the cooling operation and the heating operation. Therefore, as shown in FIG. From (4), the refrigerant pipe (7) consisting of the liquid pipe (7a), the suction gas pipe (7b) and the discharge gas pipe (7c) is connected to each indoor unit (6, 6,
...). In addition, in FIG. 2, (7a ') is a connecting portion of the liquid pipe (7a), (7b') is a connecting portion of the suction gas pipe (7b), and (7c ') is a connecting portion of the discharge gas pipe (7c). . The boiler (1) has a heat balance of all the indoor units (6,6, ...) When all the indoor units (6,6, ...) Are in the heating operation state or a part of the boiler is in the cooling operation. Drive the hot water only when the heat exchanger (10,1) of the heat exchange unit (9)
1) is supplied to. On the other hand, the cooling tower (2) has all the indoor units when all the indoor units (6, 6, ...) Are in the cooling operation state or a part thereof is in the heating operation.
Only when the heat balance of (6,6, ...) Is required to cool, the cold water is supplied to each heat exchanger (10,11) of the heat exchange unit (9). That is, the heat exchanger (10, 11)
Hot water from the boiler (1) when it functions as an evaporator, and a cooling tower when it functions as a condenser.
The cold water from (2) is supplied to each heat exchanger (1
0,11). Then, for the indoor unit (6) that is in the cooling operation state, the liquid refrigerant is supplied to the indoor unit (6) from the liquid pipe (7a), and this liquid refrigerant is used in the heat exchanger in the indoor unit (6). An indoor unit that is in a heating operation while evaporating and returning to the refrigerator unit (8) through the suction gas pipe (7b)
For (6), the gas refrigerant is supplied to the indoor unit (6) from the discharge gas pipe (7c), this gas refrigerant is condensed in the heat exchanger in the indoor unit (6), and the liquid pipe (7a) By refrigerator unit
Refrigerant is circulated back to (8) and each indoor unit (6,6, ...)
The cooling operation and the heating operation can be individually performed.

Next, the internal structure of the heat source unit (4) will be described. As shown in FIGS. 2 to 4, in the heat source device (4), the inside of the casing (14) formed by assembling a plurality of plate materials is divided into two upper and lower spaces (A, B) by a partition plate (14a). The refrigerator unit (8) is housed in the lower space (B), and the heat exchange unit (9) is housed in the upper space (A).

The top plate (14b) constituting the upper surface of the casing (14) has a plurality of openings (not shown) for taking out pipes and the like. And the refrigerant pipe (7)
Extends through the opening formed in the top plate (14b) toward the indoor unit (6) side.

Further, the heat exchanger (10) constituting the heat exchange unit (9) has a plurality of passes (four passes in this example) formed in a spiral shape, as shown in FIGS. The first to fourth heat exchange tubes (10a, 10b, 10c, 10d) are vertically stacked, and each heat exchange tube (10a, 10b, 10c, 10d) is connected by a tightening band (15). It is fastened together. In addition, each heat exchange pipe (10a to 10d, 10a to 10d of the heat exchanger (10) and the auxiliary heat exchanger (11),
11a) is formed of a double pipe, and the passage (1
Water is allowed to flow in 0e, 11b) and a refrigerant is allowed to flow in the outer passages (10f, 11c), and heat is exchanged between the two fluids via the tube wall. Further, as described above, each heat exchange tube formed in a spiral shape (10a to 10d, 11a) has a lower end portion on the upstream side of water flow and an upper end portion on the downstream side of water flow. There is. That is, as shown by the arrows in FIGS. 5 and 7, water is introduced from the lower ends of the heat exchange tubes (10a to 10d, 11a) and discharged from the upper ends thereof. Note that (S) in FIGS. 2 and 3 is a switch box.

Next, a piping structure for supplying and draining water to and from each heat exchanger (10, 11) will be described. Casing (1
The upper space (A) in 4) is provided with pipes (16, 17, 18) as three connecting pipes extending vertically in the space (A). These are a water inlet header (16) whose one end is connected to the water supply pipe (5a) to introduce water into the heat exchanger (10) and the auxiliary heat exchanger (11), and the heat exchanger (10). The water outlet header (17) that collects the water that is derived from the water outlet header (17) and the water that is connected to the water recovery pipe (5b) at one end and that is recovered from the auxiliary heat exchanger (11). It consists of a water outlet pipe (18) leading to a water recovery pipe (5b). Then, as shown in FIG. 2, the upper ends of the water inlet header (16) and the water outlet pipe (18) are the top plate (14b) of the casing (14).
Through the water supply pipe (5a) and the water recovery pipe (5b). This means that each of these tubes (16,18) is a casing (14).
Penetrates through the upper surface of.

The structure of each of these pipes (16, 17, 18) will be described in detail. As shown in FIG. 2, the water inlet header (16) is
The heat exchanger (10) faces the upstream end of each heat exchange pipe (10a to 10d) and extends in the vertical direction, and the upper end of the casing top plate (1
The lower end is located above 4b) and the lower end is located above partition (14a). Further, as shown in FIGS. 5 and 7, the water inlet header (16) has heat exchangers (1
The upstream side of each heat exchange pipe (10a ~ 10d) of 0) is connected, and communicates with the water flow passage (10e) inside the heat exchange pipe (10a ~ 10d),
Water is supplied to the passage (10e).

The water outlet header (17) has a heat exchanger (10).
Of each of the heat exchange tubes (10a to 10d), which extend in the up-down direction so as to face the downstream side end portions thereof, and the upper end portion thereof is slightly above the lowermost first heat exchange pipe (10a) and the lower end thereof. The parts are located above the partition plate (14a) so as to face the lower end of the water inlet header (16). The upper end and the lower end of this water outlet header (17) are both closed. The water outlet header (17) is provided at four locations in the vertical direction of the heat exchanger (1
The downstream side of each heat exchange pipe (10a ~ 10d) of 0) is connected, and is communicated with the water flow passage (10e) inside the heat exchange pipe (10a ~ 10d),
Water is led out from the passage (10e).

Further, as shown in FIGS. 3 and 7, the water outlet pipe (18) is located at the position where the water inlet header (16) is arranged.
At a position close to the front surface (right side surface in FIG. 3) and side surface (lower side surface in FIG. 3) of the heat source unit (4), and the front surface of the casing (front surface in FIG. 2) with respect to the water outlet header (17). It extends in the vertical direction at a position opposed to the extension direction (vertical direction in FIG. 3). That is, the water outlet pipe (18) and the water inlet header (16) are the vertical walls (14c, 14c) of the casing (14).
Are opposed to each other in a direction inclined with respect to the extension direction of. Further, this water outlet pipe (18), like the water inlet header (16), has an upper end located above the casing top plate (14b), while a lower end located at the bottom. 4 heat exchange tubes (1
0d) is located slightly above (Figs. 2 and 5).
reference). And, the lowermost part of the water outlet pipe (18) is connected to a vertically intermediate portion of the water outlet header (17) by a connecting pipe (19) extending in the horizontal direction.
The water in 7) is collected and led to the water recovery pipe (5b). The above is the connection state of the pipes (16, 17, 18) and the heat exchanger (10). With such a configuration, the water inlet header (16), the water outlet header (17), the water outlet pipe (18), and
The water supply pipe (5a) and the water recovery pipe (5b) connected to this constitute a water supply / drain pipe (12).

Due to this piping structure, when water flows through the heat exchanger (10), the water flowing from the water supply pipe (5a) into the water inlet header (16) is heated by each heat exchanger. Exchange tube (10a, 10b, 10
c, 10d), and after exchanging heat with the refrigerant,
It is joined at the water outlet header (17) and then the connecting pipe (1
After passing through 9), the water outlet pipe (18) is circulated upward from the lowermost portion of the water outlet pipe (18) and discharged to the water recovery pipe (5b).

The details of each of these pipes (16, 17, 18) will be described. First, as shown in FIGS. 5 and 6, the water inlet header (16) and the water outlet header (17) have a heat exchanger. Inspection connection pipe used when inspecting (10) for water leaks etc.
(25,26) are provided. Specifically, the water inlet header
In the vicinity of the upper end of (16), the comparatively short inlet side connecting pipe for inspection (25) protruding to the left in FIG. 6 and in the vicinity of the lower end of the water outlet header (17) protruding to the left in FIG. A relatively long outlet connection pipe (26) for inspection is installed, and each of the connection pipes (25, 26) has an inspection pipe (25) at the final stage of the manufacturing process of the heat source unit (4). 27, 28) are connected (see FIGS. 3, 5 and 6), and water is supplied from the inspection pipes (27, 28) to the heat exchanger (10) and the auxiliary heat exchanger (11). Inspections for the presence of cracks and pressure resistance tests are being conducted. And after this inspection, inspection pipes (27, 28)
Compressed air is supplied from the device to draw out water, and plugs (P3, P3) are attached to the inspection connecting pipes (25, 26). In this way, the inspection pipes (27, 28) can be mounted from the horizontal direction, so the workability of this inspection is good and the water can be drained quickly and reliably after the inspection. There is. In addition, at the bottom of the outlet side inspection connecting pipe (26), a drain for draining water remaining in each pipe (16, 17, 18) and heat exchanger (10, 11) at the time of maintenance of the device etc. A pipe (26a) is provided and normally closed by a drain plug (P4).

Further, in this water outlet header (17), a temperature switch (30) for freeze prevention is provided so as to face the connecting portion at the downstream end of the fourth heat exchange pipe (10d) located at the bottom. A mounting pipe (31) for mounting is projected. That is, the protruding position of the attachment pipe (31) is located below the lower end of the water outlet pipe (18). For this reason,
When attaching the temperature switch (30) to the mounting pipe (31), the mounting pipe (31) should be installed from the left side in FIG.
The temperature switch (30) is inserted in and the sensor part (30a) at the tip of the switch is positioned inside the water flow passage (10e) of the fourth heat exchange pipe (10d) as shown in FIG. In other words, there are no obstacles such as the water outlet pipe (18) in this insertion direction, and this attachment work can be easily performed. In FIG. 10, (30b) is an outer holder fitted in the mounting pipe (31), (30c) is an inner holder screwed to the outer holder (30b) to hold the sensor section (30a), (30d) is the sensor section
A sensor line (30a) which is a transmission line for transmitting a temperature signal inside the water circulation space of the fourth heat exchange pipe (10d) detected in (30a).
When it is detected that the inside of the water flow passage (10e) of the fourth heat exchange pipe (10d) is at the freezing temperature, a predetermined melting operation is performed.

Next, each pipe (16, 17, 18) and the auxiliary heat exchanger (1
The connection status with 1) is explained. As shown in FIG.
The lower end of the water inlet header (16) is connected to a horizontally extending water inlet pipe (20) for the auxiliary heat exchanger. This auxiliary heat exchanger water inlet pipe (20) has disk-shaped end plates (20a, 2a) at both ends.
Each of them is closed by 0a), and a part of the outer peripheral surface thereof is connected to the lower end of the water outlet header (17) in a non-communication state. In other words, this auxiliary heat exchanger water inlet pipe (20)
Water is allowed to flow between the water inlet header (16) and water is not allowed to flow between the water outlet header (17).

Further, the auxiliary heat exchanger water inlet header (21) extending in the vertical direction is slightly closer to the water outlet header (17) than the longitudinal center of the auxiliary heat exchanger water inlet pipe (20).
Is connected to the water flow passageway (11b) inside the auxiliary heat exchanger (11) to supply water to the passageway (11b). On the other hand, an auxiliary heat exchanger water outlet pipe (22) extending in the horizontal direction is connected to the water outlet pipe (18) slightly above the center in the vertical direction. One end of the auxiliary heat exchanger water outlet pipe (22) is connected to the outer peripheral surface of the water inlet header (16) in a non-communication state. That is, the water outlet pipe (22) for the auxiliary heat exchanger is capable of flowing water between the water outlet pipe (18) and the water inlet header (16) and the water does not flow through the structure. Has become.

Further, a water outlet header (23) for the auxiliary heat exchanger that extends vertically is located slightly closer to the water inlet header (16) than the longitudinal center of the water outlet pipe (22) for the auxiliary heat exchanger.
Is connected to the water flow passage (11b) inside the auxiliary heat exchanger (11) so that water is collected from the passage (11b) and supplied to the water outlet pipe (18). ing.

With such a piping structure, an auxiliary heat exchanger
When water circulates in (11), part of the water that has flowed into the water inlet header (16) from the water supply pipe (5a) is the water inlet header (16).
Is introduced from the lower end of the water inlet pipe for auxiliary heat exchanger (20),
Auxiliary heat exchanger water inlet header (21)
Inflow to 1). And this water is the auxiliary heat exchanger (11)
After performing heat exchange with the refrigerant inside the auxiliary heat exchanger water outlet header (23), the auxiliary heat exchanger water outlet pipe (2
It flows through 2) into the water outlet pipe (18), flows upward in the water outlet pipe (18), and flows out to the water recovery pipe (5b).

A feature of this embodiment is the structure of the water inlet header (16) and the water outlet pipe (18). Hereinafter, these structures will be described. As shown in FIGS. 2 and 7 to 9,
At a plurality of locations (four locations in this example) located inside the casing (14) at the upper ends of the water inlet header (16) and the water outlet pipe (18), pipe connection portions (16a, 16a, ...), (18a, 18a, ...)
Is provided. This pipe connection (16a, 16a,…), (18
a, 18a,…) are the vertical walls (14c, 14c,…) of the casing (14)
Connecting pipes (16b, 16b,
…), (18b, 18b,…) extend horizontally in all four directions, and the inside of this connecting pipe (16b, 16b,…), (18b, 18b,…) and the water inlet header (16) and water outlet The inside of the pipe (18) is in communication with each other. And each of these connecting pipes (16b, 16b,…), (18b, 18b,
...) are equipped with plugs (P1, P1,…), (P2, P2,…) respectively, and as described above, the water pipe (5) is attached to the casing (14) on the top plate (14b) side. Connect from the water inlet header (1
6) and the water supply pipe (5a) and the water recovery pipe (5b) are respectively connected to the upper ends of the water outlet pipe (18), the plugs (P
1, P1, ...), (P2, P2, ...)
Water does not leak from (16b, 16b, ...), (18b, 18b, ...). On the other hand, from the side of the casing (14),
When a request to connect (5) occurs, each pipe (16b, 16b,
…), (18b, 18b,…) One plug plug (P1, P2) is removed respectively, and the connecting pipe (16b, 18b) opened by this
On the other hand, the water pipe (5) is connected by penetrating the side surface of the casing (14). At this time, the upper ends of the water inlet header (16) and the water outlet pipe (18) are closed by a closing plug (not shown). Also, each of these connecting pipes (16b, 16b,…), (1
8b, 18b, ...) facing the vertical wall (14c, 14c) of the casing (14)
() Has a knock hole (not shown), and when connecting the water pipe (5) from the side surface of the casing (14) as described above, an opening for inserting the water pipe (5) is easy. It can be formed into. Further, as described above, the water outlet pipe (18) and the water inlet header (16) are opposed to each other in a direction inclined with respect to the extension direction of the vertical walls (14c, 14c) of the casing (14). Moreover, the water pipe (5) penetrating the side surface of the casing (14) does not interfere with the water outlet pipe (18) or the water inlet header (16). That is, connect the water supply pipe (5a) to the water inlet header (1
When connecting the water recovery pipe (5b) to the water outlet pipe (18) in 6), the water supply pipe (5a) interferes with the water outlet pipe (18) and is connected to the water inlet header (16). It is possible to avoid a situation in which the water recovery pipe (5b) interferes with the water inlet header (16) and interferes with the connection to the water outlet pipe (18). In addition, each connection pipe
The arrangement positions of (16b, 16b, ...) And (18b, 18b, ...) are set such that a pair of four connecting pipes are at the same height position as shown in FIGS. 8 and 9. That is, the height position of the other pair of connecting pipes is different from the pair of connecting pipes, and avoiding local reduction in the strength of the water inlet header (16) and the water outlet pipe (18). There is.

Next, the refrigerator unit (8) housed in the lower space (B) of the casing (14) will be described. As shown in FIGS. 2 and 4, the refrigerator unit (8) is a refrigerant pipe.
It is equipped with two compressors (8a, 8a) connected in parallel to (7), and the discharge pipes (8c), (8c) of each compressor (8a, 8a) have an oil separator (8d). Via the valve mechanism (8e). The valve mechanism (8e) switches the supply path of the gas refrigerant discharged from the compressor (8a, 8a) according to the operating state of each indoor unit (6, 6, ...). That is, for the indoor unit (6) in the cooling operation state, this gas refrigerant is used for each heat exchanger (10,
11), the condensed liquid refrigerant is supplied to the indoor unit (6) through the liquid pipe (7a), while discharging the gas refrigerant to the indoor unit (6) in the heating operation. From 7c) indoor unit (6)
After being supplied to each heat exchanger (10,
It is designed to be flushed to 11). 2 and 4, (8f) is a four-way switching valve, (8g) is an accumulator, and (8h) is a receiver.

Next, the operation of the thus constructed water heat source air conditioner will be described. First, during heating operation, the boiler (1) is driven and hot water is supplied to the water supply pipe (5a).
And via the water inlet header (16) to each heat exchanger (10, 11) of the heat exchange unit (9). Specifically, heat exchanger (10)
Hot water is diverted from the water inlet header (16) to each heat exchange pipe (10a to 10d), and from the water inlet header (16) to the auxiliary heat exchanger (11). Hot water is introduced through the pipe (20) and the auxiliary heat exchanger water inlet header (21). On the other hand, the gas refrigerant discharged from the compressor (8a, 8a) of the refrigerator unit (8) is condensed in the indoor unit (6) and liquefied before being supplied to each heat exchanger (10, 11). . Then, heat is exchanged between the hot water and the refrigerant in each of the heat exchangers (10, 11), and the refrigerant evaporated by this is recovered in the compressors (8a, 8a). Further, the water derived from the heat exchanger (10) passes through the water outlet header (17) and the connecting pipe (19) to the water outlet pipe (18), and the water derived from the auxiliary heat exchanger (11) is supplemented. It is led out to the water outlet pipe (18) via the water outlet header (23) for the heat exchanger and the water outlet pipe (22) for the auxiliary heat exchanger, respectively, and is discharged to the boiler by the water recovery pipe (5b).
Recovered in (1). By such a circulating operation of water and refrigerant, it is possible to cause the indoor unit (6) to perform stable heating operation, and in particular, excellent indoor heating is performed even when the outside air temperature is low.

On the other hand, during the cooling operation, the cooling tower
(2) is driven, and cold water is circulated between the water heat source unit (3) and the heat exchange unit (9) like hot water during the heating operation described above. In addition, the compressor (8a,
The gas refrigerant discharged from 8a) is supplied to each heat exchanger (10, 11), exchanges heat with cold water to be condensed and liquefied, and then evaporated and compressed in the indoor unit (6). Recovered by machine (8a, 8a). By such a circulation operation of water and refrigerant,
It is possible to cause the indoor unit (6) to perform stable cooling operation even during the cooling operation, and particularly good indoor cooling is performed even in a situation where the outside air temperature is high.

As described above, the heat source machine of this example
In (4), the water inlet header (16) and the water outlet pipe (18) at the upper end portion of the portion located inside the casing (14), the pipe connection portions (16a, 16a, ...), By providing (18a, 18a, ...), this water inlet header (16) and water outlet pipe
The connection direction of the water supply pipe (5a) and the water recovery pipe (5b) with respect to (18) should be set not only on the top plate (14b) side of the casing (14) but also on the front, back, left and right side surfaces of the casing (14). Can be set in any direction. Therefore, if there is a restriction on the space in the room where the heat source unit (4) is installed, the connecting pipe (16,1
8) can be projected from the top plate (14b) side of the casing (14), or can be projected from the side surface side of the casing (14) in order to improve the connection workability of the water pipe (5). The projecting direction of the connecting pipes (16, 18) can be selectively set according to the arrangement of the heat source unit (4), and the connecting direction of the water pipe (5) can be arbitrarily changed according to the request. You can

In this example, the connection direction of the water pipe (5) is 5
Although it can be changed in one direction, the present invention is not limited to this.

Further, the water inlet header (16) and the water outlet pipe (18)
The water pipe (5) can be connected from the horizontal direction except at the connection position of these upper ends, but the water inlet header (16) and the water outlet pipe (18) can be connected horizontally. Install it by extending it to a position other than the connection position of these tips.
From the direction orthogonal to these extension directions, the water pipe (5)
May be connectable.

[0044]

As described above, according to the present invention, the following effects are exhibited. According to the first aspect of the invention, in the air conditioner using the water supplied from the water heat source means as the heat source, the water pipe can be connected to the portion of the connecting pipe forming the water supply / drainage pipe located in the casing. Since the various connecting portions are provided at a plurality of positions, the connecting direction of the water pipe to the connecting pipe can be set in various directions with respect to the casing. Therefore, the connection direction of the water pipe can be arbitrarily changed according to the request, and the pipe connection workability at the time of installation work can be favorably obtained. .

According to the second aspect of the present invention, since a plurality of pipe portions provided in the connecting pipe are closed by the closing plug except those to which the water pipe is connected, a plurality of pipe portions are provided. Even in this case, water leakage does not occur from the connecting pipe, and it is possible to obtain the effect described in claim 1 while ensuring the reliability of the device.

According to the third aspect of the invention, the water pipe can be connected to the tip of the connecting pipe by making the tip of the connecting pipe open, and the connectable direction of the water pipe can be changed. It can be increased further.

According to the fourth aspect of the present invention, when connecting the water pipe to each of the connecting pipes, another connecting pipe is located in the connecting direction of the water pipe, which hinders the connecting work. It is possible to avoid the situation where the pipes come to each other, and it is possible to satisfactorily perform the connection work between the pipes.

According to the invention described in claim 5, it is possible to easily perform the work of inserting the water pipe into the casing and connecting it to the pipe portion by opening the knock hole, and the pipe connecting work is short. Can be done in time.

[Brief description of drawings]

FIG. 1 is a system diagram of a water heat source air conditioner according to an embodiment.

FIG. 2 is a diagram showing an internal configuration of a heat source device.

FIG. 3 is a plan view showing a heat exchange unit and piping connected to the heat exchange unit.

FIG. 4 is a plan view of a refrigerator unit.

FIG. 5 is a view showing a heat exchange unit and piping connected to the heat exchange unit.

FIG. 6 is a view on arrow VI in FIG.

FIG. 7 is a view taken in the direction of the arrow VII in FIG. 5;

FIG. 8 is a view corresponding to FIG. 5 with the heat exchanger omitted.

FIG. 9 is a view on arrow IX in FIG.

FIG. 10 is a view showing a mounted state of a temperature switch for freeze prevention.

[Explanation of symbols]

 (3) Water heat source unit (water heat source means) (5) Water piping (6) Indoor unit (user side unit) (8) Refrigerator unit (refrigerant circulation unit) (9) Heat exchange unit (12) Water supply / drain pipe (14 ) Casing (16) Water inlet header (connection pipe) (18) Water outlet pipe (connection pipe) (16a, 18a) Piping connection (16b, 18b) Connection pipe (P1, P2) Closure plug

Claims (5)

[Claims] 1. A user side unit (6) installed indoors
A refrigerant circulation unit (8) for circulating a refrigerant between the use side unit (6), a water heat source means (3) for generating water at a predetermined temperature, and a water supply / drain pipe for the water heat source means (3). The refrigerant that is connected by (12) and receives heat from the water heat source means (3) and the refrigerant that circulates between the refrigerant circulation unit (8) and the utilization side unit (6) causes heat exchange between the refrigerant and the refrigerant. In a water heat source air conditioner equipped with a heat exchange unit (9) for condensing or evaporating, the heat exchange unit (9) is housed in a casing (14), and the water supply and drain pipe (12) is The casing (14) is provided with a connecting pipe (16, 18) connected to the heat exchange unit (9) and a water pipe (5) extending from the water heat source means (3). In the part located inside the casing (14) in (18), the connection parts (16a, 18a) where the water pipe (5) can be connected.
Water heat source air conditioner characterized in that a) is provided at multiple locations. 2. The connecting portion (16a, 18a) is a pipe portion (16b, 18b) extending in a direction orthogonal to the extending direction of the connecting pipe (16, 18).
The pipes (16b, 18b) except the one to which the water pipe (5) is connected are closed by the closing plugs (P1, P2). Water heat source air conditioner. 3. The water pipe (5) is provided at the tip of the connecting pipe (16, 18).
The water heat source air conditioner according to claim 1 or 2, wherein the water heat source air conditioner is openable so that the water heat source can be connected. 4. The connecting pipes (16, 18) are made up of a pair of pipes that are opposed to each other in parallel, and the direction in which the pipes face each other is relative to the connecting portions (16a, 18a) provided respectively. 4. The water heat source air conditioner according to claim 1, wherein the water heat source air conditioner is set in a direction different from the connecting direction of the water pipe (5). 5. The water heat source air conditioner according to claim 2, wherein the casing (14) is provided with a knock hole which can be opened at a position corresponding to the pipe portion (16b, 18b).