JPS5843364A - Controller for absorption heat pump - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an absorption heat posipro: control device layer 2 for the refrigerant antifreeze used.

The absorption pump consists of a regenerator, a condenser, an evaporator-generator, etc. The regenerator distributes the refrigerant from the absorption liquid, and the SC
The heat obtained by vaporizing the liquid refrigerant in the generator is the heat of condensation! In addition, the reaction heat of the absorbing liquid is collected by a six-hole steel structure outside the machine, and is used to raise the temperature of hot spring water or to raise the temperature of a single pipe in a factory.

However, in this type of absorption and -topump, as well as absorption refrigerators, absorption tIIg': tuteum bromide, refrigerant I =
In order to use water as a warning, the conditions for use in the pump are G = 1, and the freezing of the refrigerant (water) is 1A - J;
When the cold fly came to an end, it had the drawbacks of completely losing its function as a heat pump and damaging its consciousness.

For this reason, the temperature or pressure conditions of the evaporator of the absorption heat pump are close to 4I% when the temperature or pressure conditions cause the refrigerant to freeze.
1:” is absorbed by stopping the operation of the regenerator burner!-
) Attempts have been made to install a refrigerant antifreeze device to forcibly stop the operation of the PoyV, but the absorption rate is low. When restarting heat pump operation after stopping the second operation and exposing the equipment to low temperatures, the refrigerant freeze prevention device will operate even when the refrigerant freezes, making it impossible to restart heat pump operation. There are things to do.

In particular, when the temperature sensing part for preventing refrigerant freezing is installed in the evaporator 6, which is both absorbent and bomb, the ability to prevent refrigerant from freezing is high, but if the temperature inside the evaporator drops even for a short period of time before restarting operation, It is inevitable that the refrigerant anti-freezing device will activate.If you do not operate the Pana to raise the internal temperature of the machine or manually raise the temperature of the equipment by running hot water, normal operation will not occur. It also has disadvantages such as:

The present invention was developed in view of the fact that the absorption heat pump operation "stop function" by the anti-freezing device would prevent the heat pump operation for a certain period of time after the absorption pump starts operating. This control device is characterized by the ability to smoothly start operation at any time.

8 in the figure, ... is a regenerator having a heater (21) for separating the refrigerant from the dilute absorption liquid that has absorbed the refrigerant; A heat exchanger (51
The condenser (16) is heated to liquefy the refrigerant in the condenser (41), and the evaporator (16) obtains thermal energy from the heat source water (71) at a low temperature level by vaporizing the refrigerant liquefied in the condenser (41) under low pressure conditions. 8) Evaporates unvaporized liquid refrigerant 1!16)
Upper-two recirculating lift pumps, (9) regenerators (1
1 also absorbs the vaporized refrigerant in the evaporator (6) using the supplied absorption liquid! The absorber (9) houses a heater 00 that raises the temperature of the hot water flowing into the absorber (91) using the latent heat of the refrigerant gas and the heat of reaction between the refrigerant gas and the absorption liquid. A vessel a@ and a heat exchanger (5) are connected to obtain hot water from the flowing pipe D.

In other words, os is a regenerator for the diluted absorption liquid that has absorbed the refrigerant (1) Kame: Return suction @liquid pump % = is a burner, 041 is antifreeze*t is a refrigerant low --- mo, 119 is When the humidity of the absorption liquid is at a certain temperature (for example, 50"1 or higher), the absorption liquid pump closes at 0.
1: Operates the pump start/stop thermostat, - closes when the heat source water temperature is above a certain temperature to enable heat pump operation, and 2) controls the heat source water. 1 are connected as shown in the electric circuit of FIG. 2 or 3 to constitute the control device of the present invention.

, that is, in order to start the operation of the absorption heat pump using the electric circuit of 4 mW in Figure 2, when the operation switch is closed, normally, the main temperature of the heat source is above a certain temperature and the heat source water is not turned on. The tie is closed and the solenoid is energized and the contact A is closed, and the burner is energized through the normally closed switch contact Qυ, so the contact of the low-temperature propellant is opened and closed. Heating of the absorption liquid in the regenerator (1) is started regardless of the situation. The above-mentioned refrigerant low temperature is the temperature or pressure condition of the evaporation town 6) that causes the refrigerant to freeze: when approaching the burner osc.
I) This is to stop the operation of the absorption liquid pump G, but if such an electric circuit is used, the stop function of the antifreeze device will not reach the absorption and absorption pump G due to the contact 121), and the operation will be forcibly stopped. As burner a3 is operated (secondly, the temperature of the absorption liquid in the regenerator (1) gradually increases to
When the contact a of the branch pump leaf is closed and the absorption liquid pump ms is operated, the high temperature absorption liquid is circulated through the absorption liquid 19) and normal heat pump operation is started. Furthermore, since the closing of the contact os also energizes the solenoid, the contact @ is opened, and at the same time as the normal heat pump operation starts, the low-temperature cheese for preventing freezing of the refrigerant also enters the normal operating state. When the refrigerant freezes, such as a decrease in the flow rate of one heat fI, the anti-freezing device automatically stops the two burners, then stops the operation of the absorption liquid positive three, and turns off the heat pump. Damage can be prevented.

FIG. S shows another embodiment of the control device of the present invention, in which the stop s11 of the refrigerant antifreeze device does not reach the heat pump for a certain period of time at the start of operation, and the burner 411 is forced to operate. In order to do this, the timer solenoid and its contacts are connected in parallel with the refrigerant low temperature control valve. The other parts are the same as in Figure 2, so while the operation switch 09 is turned on and the timer switch port and contacts @ are working, the absorption and one pumps operate as in the beginning of operation in Figure 2. The refrigerant freeze prevention device including the refrigerant low temperature thermometer 04 begins to function as a normal protection device at the same time when the timer ① ends and the contact @ opens.

As described above, the control device for an absorption heat pump according to the present invention prevents the refrigerant □, loincloth- This is designed to prevent the stoppage of heat pump operation due to a malfunction of the refrigerant antifreeze mechanism, which can occur at the start of operation of an absorption heat pump equipped with a prevention device, and does not require a particularly large starter device. The absorption heat pump can start operation automatically, and can be applied to small and simple absorption heat pumps to ensure a reliable start of operation.

Brief explanation of the drawing: 1llll":
・1. ,.

FIG. 1 is a cycle diagram showing an example of an absorption heat pop, and FIGS. 2 and 3 are main part electrical circuit diagrams showing an embodiment of a control device according to the present invention.

1 - regenerator, 4 - condenser, 6 - evaporator.

9~Absorber, 10~Heater, 14~Refrigerant low temperature thermostat.

Figure 1 Figure 2 Figure 3 1.3 1215

Claims (1)

[Claims] (1) #l that absorbed refrigerant! A regenerator that separates the refrigerant from the absorption liquid, and an evaporator that obtains thermal energy from a heat source body with a low temperature level by vaporizing the liquid refrigerant under low pressure conditions.The evaporator absorbs the vaporized refrigerant. Absorber absorbing liquid - an absorption pump with a heater disposed inside the absorber to heat the residue with the latent heat of the refrigerant gas and the heat of reaction between the refrigerant gas and the absorbent liquid 8, an anti-freezing device is installed that forcibly stops the operation of the absorption heat pump when the inside of the evaporator approaches conditions for freezing the refrigerant, and a certain period of time after the absorption heat pump starts operating is provided. 1. The function of stopping the operation of the absorption pump by the antifreeze device is 7.
Absorption heat pump control** characterized by not reaching the function of T-bob ν.