JP2008151457A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner capable of easily draining a hot water heat exchanger in maintenance and repair work and the like. <P>SOLUTION: This air conditioner 1 comprises a draining-time valve opening means for opening an opening/closing valve 19 when an operation of the air conditioner 1 is completely stopped, and a drain switch for starting the draining-time valve opening means when the operation of the air conditioner 1 is fully stopped. Thus the draining can be easily performed by opening the opening/closing valve 19 by the draining-time valve opening means by operating the drain switch in the maintenance and repair work and the like. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an air conditioner including a heat exchanger that heats air with hot water.

  An air conditioner having a function of heating air flowing through a ventilation path formed inside an apparatus body by a hot water heat exchanger is widely used. An air conditioner is installed on a wall or ceiling of a room, and cools, heats, dehumidifies, or humidifies indoor air. In this case, in the hot water heat exchanger, hot water is circulated through the pipes from a water heater installed outside the room.

  When repairing or maintaining an already installed air conditioner, it is necessary to remove the air conditioner from the wall or ceiling of the room. In this case, it is necessary to remove the pipe connected to the hot water heat exchanger from the air conditioner. At this time, if the water is stored in the hot water heat exchanger of the air conditioner after removing the piping, the water may overflow during the repair, maintenance, or transportation, and wet the surroundings. . Therefore, in such a case, the water in the hot water heat exchanger is drained in advance.

Generally, the hot water supplied to the hot water heat exchanger of the air conditioner is disconnected by an electric on-off valve. When draining water, it is necessary to open an electric on-off valve that connects hot water to the hot water heat exchanger. Therefore, conventionally, in order to open the electric on-off valve for draining water, the electric on-off valve has been operated once with the air conditioner once in operation.
JP 2001-193948 A JP 2003-28503 A JP-A-8-121867 JP-A-8-121866

  However, normally, when performing repairs, maintenance, etc., the equipment is temporarily stopped and then the maintenance work is started. If you notice that you forgot to drain the hot water heat exchanger after opening the housing after opening the work, close the housing lid and start the air conditioner for safety. It is necessary to drain water. Therefore, there has been a problem that work such as maintenance becomes troublesome.

  Then, the objective of this invention is providing the air conditioner which can perform draining of a warm water heat exchanger easily at the time of work, such as repair and maintenance.

  An air conditioner according to the present invention includes a housing, a ventilation path that is formed in the housing and circulates air between the air-conditioned space and the outside air space, a blower that circulates air through the ventilation path, and the ventilation A hot water heat exchanger that is provided in the passage and heats the air in the ventilation passage by hot water heat, and an on-off valve that is provided in the housing and cuts off the hot water in the hot water heat exchanger; When the operation of the air conditioner is completely stopped, the drain opening valve means for opening the on-off valve, and the operation of the air conditioner are fully stopped And a drain switch for starting the valve opening means at the time of draining.

  This configuration makes it easy to operate the drain switch and open the on-off valve using the drain opening means even when the operation of the device is in a fully stopped state during repair or maintenance work. It becomes possible to drain water.

  Here, the “drain switch” may be a switch selected by selecting a selection button displayed as an image on the display screen in addition to a so-called normal switch. Moreover, as an on-off valve, a thermally operated valve, an electric valve, a solenoid valve, or the like can be used.

  As described above, according to the present invention, the open / close valve is opened by the drain switch and the drain opening valve means even when the operation state of the apparatus main body is in a completely stopped state during work such as repair or maintenance. Therefore, it becomes possible to drain water easily, and repair and maintenance work are facilitated.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram illustrating a configuration of an air conditioner 1 according to a first embodiment of the present invention. FIG. 2 is a diagram schematically showing the configuration of the air conditioner 1 of FIG. In the present embodiment, as an example of the air conditioner 1, a desiccant air conditioner that dehumidifies the indoor space will be described.

  The air conditioner 1 includes a rectangular housing 2 in plan view. The interior of the housing 2 is partitioned into a dehumidifying channel A and a regeneration channel B by partition members 3, 4, and 5. The dehumidification flow path A is a ventilation path through which the outdoor air OA supplied from the outdoor space to the room flows. The regeneration channel B is a channel through which indoor air RA exhausted from the indoor space to the outdoor space flows.

  The left and right side walls of the housing 2 are installed facing the outdoor space and the indoor space, respectively. A dehumidification channel intake port 6 and a regeneration channel exhaust port 7 are formed on the side wall of the housing 2 facing the outdoor space. In addition, a regeneration channel intake port 8 and a dehumidification channel exhaust port 9 are provided on the side wall of the housing 2 facing the indoor space.

  Inside the housing 2 are a rotor assembly 10, a sensible heat exchanger 11, a first blower 12, a second blower 13, a regenerative heat exchanger 15, an indoor temperature / humidity sensor 17, an outdoor temperature / humidity sensor 18, an on-off valve. 19, a regenerating thermistor 20 and a control board 21 are provided. The rotor assembly 10 includes a desiccant rotor 14, a rotor shaft 14a, a rotor frame 14b, rotor gears 14c and 14d, and a rotor motor 16.

  Hot water is circulated in the regenerative heat exchanger 15 through the internal hot water supply pipe 15a. The internal hot water supply pipe 15a is connected to pipe connection nipples 22 and 23 provided on the side wall of the casing 2 on the side facing the room. The pipe connection nipples 22 and 23 are connected to an external hot water supply pipe (not shown) that circulates and supplies hot water from a hot water heater (not shown) installed outside. The regenerative heat exchanger 15 exchanges heat with the hot water and the air in the regenerative flow path B to heat the air in the regenerative flow path B.

  When the dehumidifying operation is performed, the outdoor air OA is circulated through the dehumidifying channel A by the second blower 13. The indoor air RA in the indoor space is circulated through the regeneration flow path B by the first blower 12. In addition, the desiccant rotor 14 is rotated at a low speed by the rotor motor 16 and adsorbs moisture of the air in the dehumidifying channel A and desorbs it into the air of the regeneration channel B, thereby exchanging moisture. The on-off valve 19 is opened, and hot water is circulated through the regenerative heat exchanger 15.

  The outdoor air OA flowing from the outdoor space into the dehumidifying channel A passes through the desiccant rotor 14. At this time, moisture in the air is adsorbed by the desiccant rotor 14, and after exchanging heat with the indoor air RA in the sensible heat exchanger 11, the second air blower 13 passes through the dehumidifying channel exhaust port 9. It is discharged into the room.

  On the other hand, the indoor air RA flowing into the regeneration flow path B from the indoor space first exchanges heat with the air in the dehumidification flow path A in the sensible heat exchanger 11, and then the regenerative heat exchanger 15 and the desiccant rotor 14. pass. The air in the regeneration channel B is heated in the regeneration heat exchanger 15 and passes through the desiccant rotor 14 in a high temperature state. Therefore, moisture adsorbed on the desiccant rotor 14 is desorbed and becomes air in the regeneration channel B. Released. The air with moisture passes through the first blower 12 and is discharged to the outside from the regeneration flow path exhaust port 7.

  The overall operation control of the air conditioner 1 is performed by the control board 21. Further, a remote controller 30 is connected to the control board 21 (see FIG. 2), and remote control is possible. As shown in FIG. 3, the remote control 30 is provided with a liquid crystal display screen 30a and a plurality of input buttons 30b. An instruction can be input to the control board 21 by pressing the input button 30b in accordance with the display on the liquid crystal display screen 30a.

  In the air conditioner 1 having the above configuration, when maintenance is performed, first, the operation state of the air conditioner 1 is set to a fully stopped state by the remote controller 30. In the fully stopped state, the first blower 12, the second blower 13, and the rotor motor 16 are stopped, and the on-off valve 19 is closed.

  First, the external water heater connected to the pipe connection nipples 22 and 23 is extracted. As a result, the pipe end of the internal hot water supply pipe 15a is released, but water cannot be drained because the on-off valve 19 is closed.

  Therefore, next, a maintenance mode switch provided on the remote controller 30 is pushed to enter the maintenance mode. At this time, the maintenance mode is displayed on the liquid crystal display screen 30a of the remote controller 30.

  In the maintenance mode display, a “water drain button” for selecting the “water drain” operation of the regenerative heat exchanger 15 is displayed. Therefore, when the “drain button” is selected by the input button 30b, the control board 21 opens the on-off valve 19. Thereby, the water in the regeneration heat exchanger 15 is drained.

  As described above, in the air conditioner 1 according to the present embodiment, the on-off valve 19 can be opened by setting the remote controller 30 in the maintenance mode and selecting the “drain button” in the fully stopped state. As a result, it becomes possible to easily drain the hot water heat exchanger during work such as repair and maintenance.

  In the above description, the air conditioner 1 has been described as a dehumidifying desiccant air conditioner, but the present invention can also be applied to a humidified desiccant air conditioner having a plurality of hot water heat exchangers. If you have multiple hot water heat exchangers, do not open all the open / close valves at once, but when you have finished draining one hot water heat exchanger, drain the next hot water heat exchanger It is desirable to sequentially drain water.

It is a figure showing the structure of the air conditioner 1 which concerns on Example 1 of this invention. FIG. 2 is a diagram schematically illustrating the configuration of the air conditioner 1 of FIG. 1. 2 is a diagram illustrating a configuration of a remote controller 30. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air conditioner 2 Housing | casing 3,4,5 Partition member 6 Dehumidification flow path inlet 7 Regeneration flow path exhaust port 8 Regeneration flow path intake port 9 Dehumidification flow path exhaust port 10 Rotor assembly 11 Sensible heat exchanger 12 1st air blower 13 Second blower 14 Desiccant rotor 14a Rotor shaft 14b Rotor frame 14c, 14d Rotor gear 15 Regenerative heat exchanger 15a Internal hot water supply pipe 16 Rotor motor 17 Indoor temperature / humidity sensor 18 Outdoor temperature / humidity sensor 19 Open / close valve 20 Regenerative thermistor 21 Control boards 22, 23 Pipe connection nipple A Dehumidification flow path B Regeneration flow path 30 Remote control 30a Liquid crystal display screen 30b Input button

Claims (1)

A housing,
An air passage that is formed in the housing and circulates air between the air-conditioned space and the outside air space;
A blower for circulating air in the ventilation path;
A hot water heat exchanger that is provided in the ventilation path and heats the air in the ventilation path with hot water heat;
An on-off valve provided in the housing, for disconnecting hot water from the hot water heat exchanger;
In an air conditioner equipped with
When the operation of the air conditioner is completely stopped, the drain opening valve means for opening the on-off valve; and
When the operation of the air conditioner is completely stopped, a drain switch that activates the drain opening valve means,
An air conditioner characterized by comprising:

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