JPS5963474A - Defroster - 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 FIELD OF THE INVENTION The present invention relates to a defrosting device for products in which 1 and 11 are deposited and grown on a heat exchanger.

Conventional structure and its problems When it comes to dehumidifiers, etc., the temperature of the evaporator after a certain period of time after the start of dehumidification varies depending on the ambient temperature during operation, as shown in Figure 1. In this method, the solenoid valve is actuated by sensing the temperature of the heat exchanger, and if the thermostat is set to the optimum temperature at a certain ambient temperature, it will not work in the other 11 to 4 degrees range. Excessive defrosting may occur due to improper defrosting operation or variations in thermostat temperature settings.
It had the disadvantage of being inconsistent in its timing. Also, Figure 2,
As shown in Figure 8, in the method of embedding the temperature sensing part (2) of the thermostat (1) in the fins (4) of the heat exchanger (3), the temperature of the heat exchanger is directly sensed, so the ambient temperature Depending on the situation, defrosting may start and then end before the charm has completely melted, or defrosting may start even before the boxes are completely assembled. In order to avoid this, a method has been taken in which a timer and a thermometer are combined to prevent υ malfunctions using the cam tiJ 84, but this method has the drawback of increasing cost. Moreover, the drawbacks such as the increase in the number of man-hours required to embed the temperature-sensing part (2) in the fin (4) were also overcome.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and aims to provide a registration removal device that can efficiently perform automatic registration according to changes in ambient temperature and eliminate malfunctions.

11G of the Invention The present invention includes a thermostat that operates by detecting the humidity of the evaporator, an electric timer that repeatedly turns on and off at regular intervals, and a solenoid valve installed in the refrigeration circuit. The heating part is placed in a fixed holder at a predetermined distance from the evaporator, and the solenoid valve is operated when the temperature sensing part of the thermostat comes into contact with or approaches the frost that has grown from the S generator, and the thermostat is activated and the electric timer is activated. It is connected so that it is activated when it is off, and is configured so that when the solenoid valve 9i1 is activated, hot gas from the refrigeration circuit flows into the evaporator with frost, thereby determining the timing of defrosting and The intended purpose is achieved by detecting the end of removal from the register and automatically repeating defrosting and dehumidifying operations.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Fourth
In the refrigeration circuit shown in the figure, the flow of refrigerant during dehumidification operation is as follows: energization of solenoid valve αυ from compressor 00, condenser O, and resistance pipe 0.
3 is energized and the evaporator is turned off to generate dew and sheath, and then returns to the compressor 01. At the time of deregistration, the refrigerant discharged from the pressure oil 1 machine 01 flows directly from the solenoid valve αη into the evaporator θQ as hot gas, and the heat melts the frost, and the compressor 00
Return to

Next, the electrical operation will be explained with reference to FIGS. 5 to 10. The operation of the timer is as shown in FIG.

It is on for 62 hours and off for 62 hours, after which it is cycled back in time. As shown in Part 6, the operation of the thermostat Q7) turns off when the temperature of the temperature sensing part (18) becomes 11 or less, and once the temperature rises to 12 or more after turning off, the thermostat Q7) turns off. The temperature is maintained until the temperature drops to 11 or less, and then the cycle is repeated. When the dehumidifying operation is started, the electric circuit, compressor H, fan motor 05), and timer is energized, and the wind generated by the blade Q flows through the evaporator QQ and condenser (J21).Even if the timer contact turns off, the temperature sensing part (1) of the thermostat 07
If the temperature at 81 is not below 11, the dehumidification operation continues as shown in FIG. When the timer contact mechanism is off, when the temperature of the temperature sensing part θ→ of the thermostat (l) becomes below t, the thermostat θ is turned off, and as shown in Figure 9, the temperature of the thermostat θ→ is The power goes out? lj
The magnetic valve coil (23) is energized, the solenoid valve 0υ is activated, and the registration is removed. After defrosting is finished, the temperature of the evaporator QQ rises, and the temperature of the temperature sensing part θ of the thermostat (main) reaches 1.
When the value is 2 or more, the thermostat θη is turned on, the electromagnetic valve coil (to) is de-energized as shown in FIG. 8, the fan motor θ6) is energized, and the dehumidifying operation is restarted.

After the start of the critical phase, the thermostat) Q7) temperature sensing part θ8)
Even if the temperature does not rise above 12, if the timer contact turns on, the solenoid valve coil □
The power to □□ is cut off, the fan motor θ5) is powered, and the dehumidifying operation is started. Furthermore, as can be seen in Fig. 10, even if the temperature of the temperature sensing part θ~ of the thermostat Oη is below 11, the timer contacts (2 vessels) are turned on.
Dehumidifying operation continues regardless of whether thermostat 07) is on or off. As you can see from the above actions,
The end of oil removal operation is determined by the temperature sensing part (1) of thermostat 071.
The earlier of the temperature rises to 12 or the timer contact and the end of the brown off time takes precedence.

The temperature sensing portion 08) of the thermostat θ is inserted into a fixed holder example as shown in FIGS. 11 to 13, and is fixed with movement restricted in all directions, vertically and horizontally.

Furthermore, the exaggerated part 00 of the fixed holder □□□ is shown in Figure 14~
As shown in Fig. 16, the pipe section (31i
), the distance between the surface (36) of the evaporator 01 and the temperature sensing portion θ8) of the thermostat O'I) is kept constant. G is the fin.

As the frost grows, the temperature sensing part θ of the thermostat θ~
When it approaches and grows to a certain distance, the sheath comes into contact with the temperature sensing part (1~), the temperature of the temperature sensing part OPJ drops rapidly, and the thermostat Q7 is activated and turned off. Furthermore, when the temperature of the evaporator θQ starts to rise and the temperature of the evaporator θQ rises, the fan motor (15) is stopped, so even if the ambient temperature is low, the temperature sensing of the thermostat θη is caused by the heat from the evaporator af1. When the temperature at part θ also rises and reaches 12 or more, the thermostat Qη is turned on again.

Now, assume that the ambient temperature of the main body during operation is Ill, the frost sensing temperature of the thermostat α force is tl, the reset temperature is t2, the actual frost temperature is 13, the on time of the timer contact (24) is 7, and the off time is 7. An example of the timing flowchart of the movement of the timer contact under each temperature condition, the temperature change of the temperature sensor θ barrel, the movement of the contact of the thermostat θη, and the timing of the solenoid valve operation when is set to 112 is shown in the 17th example. It is shown in FIGS.

As you can see from the figure, 1. >1. If the setting temperature of the thermostatic Cl force is determined under the temperature condition of ≧t, when the ambient temperature is high to a certain extent, the dehumidifying operation continues until the frost grows, and when the bells grow to a certain extent, as shown in Figure 17. Defrosting begins. Also, when the ambient temperature is low, as shown in Figure 19, forced dehumidification is performed for a certain period of time even if the thermostat Q71 is turned off. Accordingly, efficient defrosting becomes possible. In addition, in any case, the evaporator 0φ and the temperature sensing part (1
8) is not in contact with 1a, so there are no problems such as a sudden temperature drop of the evaporator α mark at the beginning of the dehumidifying operation or a malfunction of the thermostat α force due to a sudden temperature rise after the start of the defrosting operation.

In addition, the amount of frost adhesion on the T5 sensor can be easily adjusted by changing the distance IJL between the temperature sensing part position of the fixed holder and the evaporator 0 → and the on/off cycle of the timer contact ρ. I can do it.

Effects of the Invention As described above, according to the present invention, the distance between the temperature sensing part of the thermostat and the surface of the heat exchanger can be kept constant;
In addition, by combining the timer and thermostat contacts with wires, efficient automatic defrosting can be achieved in response to changes in ambient temperature, eliminating malfunctions and reducing the number of attachment sources.
This has the effect that it can be easily changed by changing the height of the temperature sensing part of the fixed holder and the on/off cycle of the timer.

[Brief explanation of the drawing]

Fig. 1 is a characteristic diagram showing the relationship between the ambient temperature and the temperature of the evaporator for a certain period of time after dehumidifying operation, and Figs. 2 and 3 are explanatory diagrams showing the mounting state of the thermostat in a conventional example M1.
Fig. 4 is a refrigeration circuit diagram of a dehumidifier according to an embodiment of the present invention, Fig. 5 is a timing flowchart of the timer contacts used in the invention, Fig. 6 is a timing flowchart of the thermostat contacts, and Fig. 7 are electric circuit diagrams of a dehumidifier according to an embodiment of the present invention, FIGS. 8 and 9, and 1θ.
The figure is a circuit diagram showing the operation of the main parts, Figure 11 is the top surface M of the fixed holder, Figure 12 is a side view of the fixed holder showing the state in which the temperature sensing part of the thermostat is attached, and Figure 18 is a side view of the fixed holder. Fig. 12 is a sectional view taken along line A-A in Fig. 12, Fig. 14 is a front view of the evaporator showing the state in which the temperature-sensing part of the thermostat is also attached, Fig. 15 is its side view, and Fig. 16 is B-B in Fig. 14. [The r-plane diagram, FIGS. 17, 18, and 19 are characteristic diagrams showing temporal changes in the timer contact, the temperature sensing part temperature, the thermostat contact, and the solenoid valve output at each ambient temperature. αO...Compressor, αυ...Solenoid valve, (A)...Condenser, θ51- fan motor, H...Evaporator, αη
...Thermostat, 08] ...Temperature-sensing part, (Foundation)...
・Solenoid valve coil/L, (241... timer contact, (2
FA...Timer motor, Cap...Fixed holder, 0υ°°
``Groove section, (c)... Pipe section agent Yoshihiro Morimoto Figure 1 ff1BE class Figure 2 Figure 3 Figure 4j Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 1θ Figure Figure 11n

Claims (1)

[Claims] 1. A thermostat that detects the temperature of the evaporator and operates, a 7-way timer that repeatedly turns on and off for a certain period of time, and a solenoid valve installed in the refrigeration circuit. Place the temperature-sensing part of the thermostat in a solid holder at a predetermined distance from the evaporator, and place the solenoid valve described in 11. a defrosting device connected so as to be activated when the electric timer is activated and the electric timer is off, and configured to cause hot gas in the cooling boost circuit to flow to the frosted evaporator when the solenoid valve is activated. .