JP2003014257A - Absorption air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problems with a conventional absorption air conditioner that the worker needs to go to an indoor unit after pulling out a drain plug in an outdoor unit so the work is troublesome and the work time becomes long, though in the conventional way, the worker opens a drain plug on the side of the outdoor unit, and next operates the indoor unit thereby opening a flow regulating valve arranged within the indoor unit, in the case of draining the cold/warm water within a cold/warm water pipe. SOLUTION: The work of draining the cold/warm water pipe 5 of cold/warm water can be done merely on the side of the outdoor unit 1 since this air conditioner can compulsively open the flow regulating valve 6 arranged outdoors by means of the controller 3 of the outdoor unit 3 during OFF of a cold/warm water pump. In short, it gets off without going to the indoor unit 2, and the work of draining the cold/warm water pipe 5 of cold/warm water can be put done easily in a short time. Moreover, since the flow regulating valve 6 is arranged outdoors, even if working sound occurs in the flow regulating valve 6, this working sound does not reach the ears of the user within the room, consequently the indoor sound can be made small.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption type heating / cooling system using an absorption type refrigeration cycle, and particularly to a heating / cooling heat medium (for example, cooling / heating water) from the inside of a circulation means connecting an outdoor unit and an indoor unit. ) About the technology to pull out.

[0002]

2. Description of the Related Art In an absorption type cooling and heating apparatus, a heating / cooling heat medium (hereinafter, cold / hot water) cooled or heated by an outdoor unit is guided to an indoor unit by a circulation means (hereinafter, cold / hot water pipe), and the indoor unit is indoors. Cool or heat. The cold / hot water having undergone heat exchange in the indoor unit is returned to the outdoor unit again by the cold / hot water pipe. Conventionally, a flow rate adjusting valve for adjusting the flow rate of cold / hot water is provided inside the indoor unit, and the opening of this flow rate adjusting valve is adjusted by the controller of the indoor unit.

[0003]

[Problems to be solved by the invention]
The cold and hot water in the hot and cold water pipes may be drained when performing maintenance. In that case, first open the water drain plug on the outdoor unit side, then operate the indoor unit and open the flow rate adjustment valve,
The cold / hot water in the cold / hot water pipe was drained from the water drain plug. However, after removing the water drain plug with the outdoor unit, it is necessary to go indoors to operate the indoor unit, which increases the burden on the operator and lengthens the working time.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to easily and quickly perform a work of removing a heating / cooling heat medium from a circulation means (so-called draining work). To provide a simple absorption type air conditioner.

[0005]

In order to achieve the above-mentioned object, the absorption type cooling and heating apparatus of the present invention employs the following technical means. [Means of Claim 1] An absorption type cooling and heating apparatus comprises an outdoor unit equipped with an absorption type refrigeration cycle, and an indoor unit that performs at least one of cooling and heating in a room by a heat medium for cooling and heating supplied from the outdoor unit, A circulation unit that supplies a heating / cooling heat medium from the outdoor unit to the indoor unit and returns the cooling / heating heat medium from the indoor unit to the outdoor unit, and a flow rate adjustment that adjusts the flow rate of the cooling / heating heat medium flowing through the circulation unit. A valve, wherein the outdoor unit is equipped with a controller having a function of a forced valve opening unit for forcibly opening the flow rate control valve during the stop of the heating and cooling operation. To do.

[Means for Claim 2] In the absorption type cooling and heating apparatus according to claim 1, the flow rate adjusting valve is provided outside the indoor unit.

[Means for Claim 3] In the absorption type cooling and heating apparatus according to claim 1 or 2, the controller is
When the operation of forcibly opening the flow rate adjusting valve is performed, the flow rate adjusting valve is opened only when the cooling and heating heat medium circulation pump for circulating the heating and cooling heat medium is stopped. To do.

[Means for Claim 4] In the absorption type cooling and heating apparatus according to any one of claims 1 to 3, when the controller receives an operation for ending the forced opening of the flow rate adjusting valve, the controller is forcibly opened. It is characterized in that the forced opening of the flow rate adjusting valve is ended when a predetermined time has elapsed from the start of the valve or when an operation instruction for cooling or heating is received.

[Means of Claim 5] In the absorption type cooling and heating apparatus according to any one of Claims 1 to 4, the controller includes display means for displaying that the flow rate adjusting valve is forcibly opened. It is characterized by being provided.

[Means of Claim 6] In the absorption type cooling and heating apparatus according to any one of Claims 1 to 5, when the heater incorporated therein is heated by the heater incorporated therein, the flow control valve is provided with a wax pellet incorporated therein. It is a thermal valve whose opening is increased by expansion.

[0011]

[Operation and effect of the invention] [Operation and effect of claim 1] While the cooling and heating operation is stopped, the controller mounted in the outdoor unit can forcibly open the flow rate adjusting valve. It is possible to perform the work of pulling out the air from the circulation means only on the outdoor unit side. That is, unlike the conventional art, since the work for removing the heating / cooling heat medium from the circulation means is not required, it is not necessary to go to the indoor unit, and the work for removing the heat / cooling heat medium from the circulation means can be easily and quickly performed. .

[Operation and Effect of Claim 2] Since the flow rate adjusting valve is provided outside the indoor unit, even when the flow rate adjusting valve makes an operating noise when performing the flow rate adjustment, This operating sound is inaudible to users in the room. Therefore, indoor noise can be reduced.

[Operation and Effect of Claim 3] Since the flow rate adjusting valve can be forcibly opened only when the cooling / heating heat medium circulation pump is stopped, the cooling / heating pressurized by the cooling / heating heat medium circulation pump. There is no problem that the heating medium is discharged to the outside, and the safety is high.

[Operation and Effect of Claim 4] Even if the operator forgets the operation for ending the forced valve opening, if the predetermined time has elapsed from the start of the forced valve opening, the flow rate control valve is forcedly opened. Since the valve is automatically closed, the valve open state is not maintained for a long time. In addition, if the operator forgets the operation to end the forced valve opening, even if it is within a predetermined time that the valve open state is maintained, if the operation instruction for cooling or heating is received,
Since the forced opening of the flow rate adjusting valve is automatically terminated, the operation can be restarted without generating an error.

[Operation and Effect of Claim 5] Since the fact that the flow rate adjusting valve is forcibly opened is visually displayed on the display means, the forced opening of the flow rate adjusting valve can be easily confirmed, and the operator There is no problem that is operated by mistake. Further, for example, when the flow rate adjusting valve is a thermal valve, the valve opening state can be confirmed by touching with a hand, but since it is visually displayed on the display means, it is not necessary to confirm by touching with a hand.

[Operation and Effect of Claim 6] Since the thermal valve is used as the flow rate adjusting valve, the operating noise of the flow rate adjusting valve can be reduced.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described based on examples and modifications. [Configuration of Embodiment] FIGS. 1 and 2 show an embodiment, and FIG. 1 is a schematic configuration diagram of an absorption type cooling and heating apparatus.

The absorption type air conditioner comprises an outdoor unit 1 and one or more indoor units 2. The outdoor unit 1 comprises a refrigerator body (not shown), a cooling tower (not shown) and a controller 3. Each of the mounted electric functional parts is controlled by the controller 3.
The refrigerator main body forms an absorption cycle by using, for example, an aqueous solution of lithium bromide as a refrigerant and an absorbing liquid, and has a heating means (not shown) for heating the absorbing liquid by combustion of gas and a single layer or a double layer. A well-known absorption absorption refrigeration cycle (not shown) of multiple effects type or more is mounted.

When a cooling operation instruction is given from the indoor unit 2 side to the controller 3 via the signal line 4, the outdoor unit 1 cools cold / hot water (corresponding to a heating / cooling heat medium) by an absorption refrigeration cycle. In addition, from the indoor unit 2 side, the signal line 4
When a heating operation instruction is given to the controller 3 via the, the outdoor unit 1 heats cold / hot water with the absorbing liquid heated by the heating means. The cooled or heated cold / hot water is driven by a cold / hot water pump (corresponding to a heating / medium circulating pump for cooling / heating) not shown, and is supplied to the indoor unit 2 through a cold / hot water pipe 5 (corresponding to a circulating means). .

The indoor unit 2 is for forcibly exchanging heat between cold and hot water and indoor air to cool or heat the room, and is an indoor heat exchanger for exchanging heat between cold and hot water and indoor air ( (Not shown) and an indoor fan (not shown). Although only one indoor unit 2 is shown in the figure, description will be made assuming that a plurality of indoor units 2 are connected to one outdoor unit 1. The cold / hot water that has undergone heat exchange in the indoor unit 2 is returned to the absorption refrigeration cycle through the cold / hot water pipe 5.

The indoor unit 2 is provided with an operation panel (not shown), and the operation panel is provided with an ON / OFF switch for heating and cooling and means for setting the temperature. The indoor fan is set to a rotational speed according to the difference between the set temperature and the indoor temperature by an internal unit control circuit (not shown) mounted on the indoor unit 2. In addition, the control circuit for the internal unit turns ON / OFF the air conditioner.
-The OFF signal and the control signal of the flow rate of the cold / hot water supplied to the indoor unit 2 are transmitted via the signal line 4 to the controller 3 of the outdoor unit 1.
It is designed to be sent to.

The flow rate of cold / hot water supplied to the indoor unit 2 is adjusted by a flow rate adjusting valve 6 provided outside the indoor unit 2 and near the outdoor unit 1 of the cold / hot water pipe 5. The flow rate adjusting valve 6 is provided for each indoor unit 2. The flow rate adjusting valve 6 is a thermal valve in which, when the built-in heater is energized and heated, the built-in wax pellets receive heat to expand and the opening degree increases. Controller 3
Is a signal from each indoor unit 2 (indoor unit 2
Based on the signal corresponding to the operating state of
Adjust the opening of.

Next, the case where the cold / hot water in the cold / hot water pipe 5 is drained will be described. When the cold / hot water in the hot / cold water pipe 5 is drained, even if the water drain plug (not shown) arranged at the bottom of the cold / hot water pipe 5 is opened, the flow rate control valve 6 arranged in the middle of the cold / hot water pipe 5 is When closed, it becomes impossible to drain cold / hot water in the cold / hot water pipe 5. Therefore, the controller 3 mounted on the outdoor unit 1 is provided with a function of a forced valve opening means for forcibly opening the flow rate adjusting valve 6 while the cooling and heating operation is stopped.

The forced opening of the flow rate adjusting valve 6 by the forced opening means is set by operating a switch (for example, a DIP switch) (not shown) provided in the controller 3. When the forced valve opening is set by the switch, the display means (not shown) provided on the side surface of the controller 3 displays "the flow rate adjusting valve 6 is forcibly opened". As an example of the display means, the display means is a 3-digit display panel using LEDs of 7 segments, and when the switch is used to set the forced valve opening, "the flow rate adjusting valve 6 is forcibly opened. "HOP (abbreviation of heater control valve open)" is displayed.

The operation of the controller 3 when the forced valve opening is set by the switch will be described with reference to the flowchart of FIG. When the forced valve opening is selected by a switch (for example, an error read switch) (start), it is determined whether the cold / hot water pump is in the OFF state (step S1). If the result of this determination is NO, the switch selection is canceled and the initial state is restored (END). If the judgment result is YES, "HOP" is displayed on the display means.
Is displayed and all the flow rate adjusting valves 6 are opened (step S2).

Next, it is judged whether or not the setting for ending the forced valve opening is made by operating the switch (step S3). If the result of this judgment is YES, the display of "HOP" on the display means is turned off and all the flow rate adjusting valves 6 are closed (step S4). If the determination result in step S3 is NO, it is determined whether or not an instruction for cooling or heating operation is given on the indoor unit 2 side (step S5). If the determination result is YES, step S
Go to 4. If the result of the determination in step S5 is NO, it is determined whether or not a predetermined time (for example, 24 hours) has elapsed since the forced valve opening was started (step S6). If the determination result is NO, the process returns to step S3, and if the determination is YES,
Go to step S4. After the execution of step S4, it returns to the initial state (end).

(Effect of the embodiment) The outdoor unit 1 is operated while the cooling and heating operation is stopped, that is, while the hot and cold water pump is off in this embodiment.
The flow rate adjusting valve 6 can be forcibly opened by the controller 3 mounted in the, so that the work of drawing cold / hot water from the cold / hot water pipe 5 can be performed only on the outdoor unit 1 side. That is, it is not necessary to go to the indoor unit 2 in order to perform the work of drawing the hot and cold water from the hot and cold water pipe 5 as in the conventional case. As a result, the cold / hot water pipe 5
The work of pulling it out can be carried out easily and in a short time.

The flow rate adjusting valve 6 is provided outside the indoor unit 2 and on the outdoor unit 1 side. That is, the flow rate adjusting valve 6 is arranged outdoors. Therefore, even if an operation sound is generated by the flow rate adjusting valve 6, this operation sound is not heard by the user in the room, and as a result, the indoor noise can be reduced. Since the flow rate adjusting valve 6 can be forcibly opened only when the cold / hot water pump is stopped, there is no problem that the cold / hot water pressurized by the cold / hot water pump is discharged to the outside.

Even if the operator forgets the operation for ending the forced valve opening, a predetermined time (for example, 2
After 4 hours), the forced opening of the flow rate adjusting valve 6 is automatically terminated, so that there is no problem that the opened state is maintained for a long time. Further, if the operator forgets to perform the operation to end the forced valve opening, even if the operation instruction for cooling or heating is received even within the predetermined time when the valve opening state is maintained, the flow rate adjusting valve 6 Since the forced valve opening of is automatically ended, the operation can be restarted without generating an error.

Since the fact that the flow rate adjusting valve 6 is forcibly opened is visually displayed on the display means, the flow rate adjusting valve 6 can be easily
The forced valve opening can be confirmed, and there is no malfunction that the operator makes an erroneous operation. Since the flow rate adjusting valve 6 is a thermal valve, the opened state can be confirmed by touching it with a hand, but it is not necessary to touch it with a hand because it is visually displayed by the display means.

[Modification] As an example of the indoor unit 2, an air conditioning indoor unit having a heat exchanger and a fan is shown, but another indoor unit 2 such as floor heating may be connected to the outdoor unit 1. . As an example of the heating means, the example in which the combustion heat of gas is used is shown, but the combustion heat of oil or the heat of an electric heater may be used, or the exhaust heat of another device (for example, an internal combustion engine) may be used. . As an example of the absorbing liquid, an aqueous lithium bromide solution is shown as an example.
Other absorbing liquids such as ammonia as the refrigerant and an aqueous ammonia solution using water as the absorbent may be used. As an example of the heat medium for cooling and heating, an example using cold / hot water (water) has been shown, but other heat medium such as antifreeze liquid or oil may be used.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an absorption type cooling and heating device.

FIG. 2 is a flowchart showing the operation of the forced valve opening means.

[Explanation of symbols]

1 outdoor unit 2 Indoor unit 3 controller 5 Hot and cold water piping (circulation means) 6 Flow rate control valve (thermal valve)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Rie Nakayama             4-1-2 Hirano-cho, Chuo-ku, Osaka City, Osaka             Gas Co., Ltd. F term (reference) 3L054 BF04 BF20                 3L060 AA08 CC08 CC19 DD01 EE33                 3L093 AA05 CC00 DD02 HH19 JJ02                       KK01 MM08

Claims (6)

[Claims] 1. An outdoor unit equipped with an absorption refrigeration cycle, an indoor unit for cooling and / or heating the room by a heating / cooling heat medium supplied from the outdoor unit, and the outdoor unit to the indoor unit. An absorption-type heating / cooling system that includes a circulation unit that supplies a cooling / heating heat medium and returns the cooling / heating heat medium from the indoor unit to the outdoor unit, and a flow rate adjustment valve that regulates the flow rate of the cooling / heating heat medium that flows through the circulation unit. An absorption type cooling and heating apparatus, characterized in that the outdoor unit is equipped with a controller having a function of a forced valve opening means for forcibly opening the flow rate adjusting valve while the heating and cooling operation is stopped. . 2. The absorption cooling / heating apparatus according to claim 1, wherein the flow rate adjusting valve is provided outside the indoor unit. 3. The absorption cooling and heating apparatus according to claim 1 or 2, wherein when the controller receives an operation of forcibly opening the flow rate adjusting valve, the heating and cooling heat for circulating the heating and cooling heat medium is provided. An absorption type cooling and heating apparatus, wherein the flow rate adjusting valve is opened only when the medium circulation pump is stopped. 4. The absorption type cooling and heating apparatus according to any one of claims 1 to 3, wherein when the controller receives an operation for ending the forced opening of the flow rate adjusting valve, a predetermined period starts from the start of the forced opening. An absorption type cooling and heating apparatus characterized in that the forced opening of the flow rate adjusting valve is ended when a time elapses or when an operation instruction for cooling or heating is received. 5. The absorption type cooling and heating apparatus according to any one of claims 1 to 4, wherein the controller includes display means for displaying that the flow rate adjusting valve is forcibly opened. Absorption type air conditioner. 6. The absorption type cooling and heating apparatus according to any one of claims 1 to 5, wherein when the heater incorporated therein is energized and heated, the flow control valve has an opening degree due to expansion of a wax pellet incorporated therein. An absorption type cooling and heating device characterized by an increasing number of thermal valves.