JPH0719649A - Absorption refrigerating apparatus - Google Patents

Abstract

PURPOSE:To commonly use an indoor unit by not completely stopping an absorption type refrigerating apparatus within a predetermined time from starting of a stop signal to a cooling chilled water supply signal, maintaining it in a standby state for easily restarting, and completely stopping if the stop signal is continued for the predetermined time. CONSTITUTION:When a cooling thermostat switch is ON, a predetermined cooling operation is continued, when the switch is OFF in the case of a temporary stop, only agitating is conducted (standby stop), and when the switch is returned to the ON, a normal original operation is conducted. However, when a timer starts to count, when the switch is OFF, up (the stop is continued for a predetermined time), a valve 26 of a refrigerant system to become a refrigerant tank 8 side is opened to feed refrigerant liquid to a solution tank 13, and dilute agitating is conducted by rotating a solution pump 24 for a predetermined time. Accordingly, the solution stored in a regenerator 5 is diluted to prevent absorbent from being crystallized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption refrigeration system for obtaining cold / hot water for air conditioning.

[0002]

2. Description of the Related Art Conventionally, a regenerator, an absorber, a condenser,
In the absorption type refrigerating apparatus having an evaporator or the like, the absorption type refrigerating apparatus has a poor start-up during operation. Therefore, in a completely stopped state, the concentrated liquid does not crystallize, and therefore the refrigerant is mixed with the solution to make the whole thin solution state. However, in a state in which the cooling water supply is not required in the operating state, it is desirable to place the refrigerant in the standby state so as to be able to quickly respond to the next cold water demand signal while keeping the refrigerant separated from the solution. For this reason, it has been necessary to provide a signal indicating that there is no chilled water request signal and that there is no chilled water request signal from the room even though the operation is stopped and in operation. For example, as shown in FIG. 5, in the air conditioning configuration, the outdoor unit 1 and the indoor unit 2 are
The indoor unit 2 is provided with an indoor control device a, and this control operates the outdoor unit 1 in response to a cooling request from the indoor unit 2. This outdoor unit operation is performed by the indoor unit control device. Two switches are provided for controlling by a thermo signal for use and an operation signal indicating whether or not to cool. As for the control in this case, as shown in the flowchart of FIG. 6, the operation switch is turned on to start the operation, and the operation signal and the thermo signal are used to judge whether the operation is continued, the cooling thermo is turned off, or stopped, and when the cooling thermo is turned on. When the operation is continued and the thermostat is stopped once, the solution pump is rotated to stir, and when it is stopped, diluted stirring is performed. After that, when the cooling thermostat is turned on, the operation is returned to the original operation, and when the cooling thermostat is turned off, the operation is stopped, and when the cooling thermostat is completely stopped, the refrigerant in the refrigerant tank is introduced to dilute and stir to completely homogenize the concentration.

[0003]

However, in such a signal system, the number of signals is increased and the number of signal lines needs to be increased, which complicates the signal discrimination circuit. In addition, in the indoor unit used for the air conditioner using a general compressor,
Such a signal is not necessary, and it is not preferable in terms of commonality of indoor units.

In view of the above situation, the present invention provides an absorption type refrigerating apparatus which receives only a chilled water request signal and is compatible with an indoor unit of a compressor type air conditioner so that the indoor unit can be shared. The purpose is to do.

[0005]

According to the present invention, in an absorption type refrigerating apparatus comprising a regenerator, an absorber, a condenser, an evaporator, etc., a stop signal is issued in response to a cooling water supply signal for cooling. The absorption refrigeration system is not completely stopped within a fixed time after the start of the operation, but is maintained in a standby state where it can be easily restarted, and is brought into a complete stop state when the stop signal continues for a fixed time or longer.

[0006]

As described above, in the absorption type hot and cold water apparatus including the regenerator, the absorber, the condenser, the evaporator and the like, for example, an operation stop signal which also serves as a cooling thermo signal is put on a pair of signal lines to make the thermo When it is stopped by turning it off, only stirring for easy restarting is performed (standby stop), and when the thermostat is turned on, it returns to cooling operation and continues operation. It also determines if a certain time (whether the timer is up) has elapsed since the stop signal was issued, and if the stop signal continues for a certain time or longer, introduce a refrigerant (water), dilute and stir to dilute the solution. So as not to induce the crystal of the absorbent (complete stop).

[0007]

The present invention will be described below with reference to the drawings of the embodiments.

1 and 2 are a system diagram and a schematic view of an absorption type refrigerating apparatus for air conditioning, which is divided into an outdoor unit and an indoor unit. 1 is an outdoor unit equipped with a refrigerating engine and 2 is an indoor unit equipped with a radiator. And these are connected via a pair of control signal lines 3.
On the outdoor unit side, a regenerator 5 having a cooling combustion device 4 is provided in the lower part, a communicating condenser 6 for guiding a refrigerant vapor is arranged above the regenerator 5, and a refrigerant connected to the condenser 6 is provided. The tip of the pipe 7 is connected to guide the refrigerant liquid to the evaporator 9 through the refrigerant tank 8, and the absorber 1 that guides the refrigerant vapor communicating with the evaporator 9
0 is a concentrated liquid pipe 1 connected to the concentrated liquid reservoir of the regenerator 5.
The concentrated liquid from No. 1 is introduced through the heat exchanger 12 for solution, while the solution pipe 14 drawn from the solution tank 13 connected to the absorber 10 is connected to the regenerator 5 through the heat exchanger 12. A solution circulation path is constructed. In addition, hot water or cold water flows into the indoor unit 2 through a confluent pipe that appropriately switches a hot water pipe 17 derived from a heating heat exchanger 16 having a heating combustion device 15 at a lower portion and a cold water pipe 18 derived from the evaporator 9. I am trying to do it. Reference numeral 20 denotes a control device provided on the indoor unit 2 side.

To explain this action, first, in the operation of the absorption refrigerating apparatus having a refrigerating cycle, for example, in the cooling operation, the solution accumulated in the regenerator 5 by heating the cooling combustor 4 serving as a gas burner (rare) (Solution) is boiled to separate into refrigerant vapor and concentrated liquid, and the rising refrigerant vapor is condensed by the condenser 6
Is condensed into a refrigerant liquid, the refrigerant liquid is temporarily stored in the refrigerant tank 8 from the refrigerant pipe 7, and the refrigerant liquid is collected by the refrigerant pump 2.
1 is carried to the spraying device 22 of the evaporator 9 and sprayed.
The heat transfer tube portion 18a of the cold water pipe 18 is cooled by using the latent heat of vaporization generated by the dispersion of the refrigerant liquid to obtain cold water. This cold water is guided to the indoor unit 2 side for cooling. On the other hand, the refrigerant vapor generated in the evaporator 9 flows to the absorber 10 side, and the refrigerant vapor is absorbed by the concentrated liquid from the regenerator 5 sprayed from the concentrated liquid dispersion device 23 above the absorber 10. Let it be a rare liquid. This dilute solution enters the solution tank 13 and the solution pump 24
The liquid is returned to the regenerator 1.

In this case, as the operation control, only the chilled water request signal is received, and within a certain time after the request signal is stopped, the refrigerant is held and stopped in a standby state for facilitating restart, and then in a stopped state. Is longer than a certain period of time, a complete stop state is obtained, and a state in which the refrigerant is mixed with the solution is agitated and the solution is thinned to prevent crystallization of the absorbent.

As a concrete control, as shown in the flow chart of FIG. 3, when the operation switch is turned on and the cooling thermo switch 25 is ON, a predetermined cooling operation is continued, and the cooling thermo switch is turned OFF. In the case of, only agitation is performed (standby stop), and if the cooling thermo switch is turned back on, normal operation is resumed. However,
When the cooling thermo switch is turned off and the timer starts counting, and when the timer counts up (stops for a certain period of time or more), the refrigerant system valve 26 on the refrigerant tank 8 side is opened to flow the refrigerant liquid into the solution tank 13 and the solution pump. Diluting and stirring is performed by rotating 24 for a predetermined time. Therefore, the solution accumulated in the regenerator 5 is thinned to prevent crystallization of the absorbent (complete stop). If the cooling thermo switch is turned on before the timer counts up, the operation returns to the initial stage. At this time, no dilution stirring is performed.

In other words, this means that when diluted stirring is performed, it takes time until normal operation is resumed, so it is better to wait without diluting stirring as much as possible, and when the operating switch is OFF. In order to prevent the solution from crystallizing when the operation is stopped for a relatively long period of time, the control is unavoidably performed to carry out the dilution stirring.

FIG. 4 shows a compressor type air conditioner. In this case, the power source 2 is connected to the outdoor unit 1 side.
Equipped with a compressor 28 having 7 and a power relay 29,
The indoor unit 2 is an air conditioner including a control device 20 similar to that of the above embodiment. O of the operation switch of the indoor unit 2 or the cooling thermoswitch (neither is shown)
The control device 20 turns on and off the control switch 25 according to N and OFF, and controls the energization of the power relay 29 through the pair of signal lines 3 to start and stop the compressor 28 of the outdoor unit 1. As can be seen from this, the indoor unit of the absorption type refrigeration system and the compressor type air conditioner can be shared.

[0014]

As described above, in the absorption type refrigerating apparatus of the present invention, the cooling control is performed by the signal wiring (a pair of signal lines) for receiving only the cooling water request signal, and the refrigerating apparatus is not completely stopped within the fixed time. The start-up of the operation is made good by only stirring the solution and making it into a solution state that can be easily restarted. Of course,
When the operation switch is turned off, the refrigerant is mixed and stirred with the solution to make the solution thin when the stopped state continues for a certain period of time or more, so that the crystallization of the absorbent can be prevented. Further, even if the operation switch is ON, the thermostat can also prevent the crystallization of the absorbent even when the cold water request signal is not output for a long time, and the risk of crystallization can be reduced as compared with the conventional method. Moreover, since the number of signal lines does not increase, the indoor unit of the compressor type air conditioner can be commonly used.

[Brief description of drawings]

FIG. 1 is a system diagram of an absorption refrigeration system showing an embodiment of the present invention.

FIG. 2 is a schematic view of the absorption refrigerating apparatus.

FIG. 3 is the same flowchart.

FIG. 4 is a system diagram of an embodiment showing a compressor type air conditioner / heater.

FIG. 5 is a system diagram of a conventional absorption refrigeration system.

FIG. 6 is a flowchart of the same.

[Explanation of symbols]

 1 Outdoor Unit 2 Indoor Unit 5 Regenerator 6 Condenser 9 Evaporator 10 Absorber 20 Controller 25 Cooling Thermo Switch

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shozo Kato 2-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Tetsuo Miyamoto 2-18-2 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Within the corporation

Claims (1)

[Claims] 1. An absorption type refrigerating apparatus comprising a regenerator, an absorber, a condenser, an evaporator and the like, wherein the absorption type refrigerating apparatus is used within a certain time after a stop signal is issued in response to a cooling water supply signal for cooling. An absorption type refrigeration system characterized in that the refrigeration system is not completely stopped but is kept in a standby state where it can be easily restarted, and is brought into a complete stop state when a stop signal continues for a certain period of time or longer.