CN86106473A - The many controls of many temperature energy-saving electric refrigerator - Google Patents

Abstract

The present invention is the many controls of a many temperature energy-saving electric refrigerator, is a kind of compressed steam refrigeration device that a plurality of operating rooms are arranged, and it can control and regulate the temperature of each operating room respectively, saves the service life that the energy also can prolong compressor again.

It is characterized in that in refrigeration system, being provided with combination valve, check valve and pressure switch, there are independent evaporimeter, capillary and temperature controller in each operating room, liquid refrigerant evaporates under different evaporating pressures respectively, thus reach respectively control, energy-conservation, prolong the compressor purpose in service life.

Description

The present invention is the compressed steam refrigeration device of a plurality of operating rooms, and it can control and regulate the temperature of each operating room respectively.

Known refrigerator has a plurality of operating rooms, but the temperature of each operating room can not be controlled respectively and regulate, and can only control and regulate one of them operating room, and the temperature of other operating rooms changes with thermic load, and power consumption is bigger.

Task of the present invention designs exactly a kind ofly can control and regulate each operating room's temperature respectively, saves the energy again and can prolong compressor a kind of like this refrigerator in service life.

The feature that claim 1 provides has solved this task.

Its refrigeration system of known compressed steam refrigeration device is by compressor, condenser, device for drying and filtering, one or more capillary and one or more evaporimeter constitute, of the present invention being characterized as, combination valve and check valve are housed on the refrigeration system, pressure switch is housed on the pressure duct, each evaporimeter has an independent capillary to be connected with combination valve, in the refrigeration system except that the highest evaporimeter of evaporating pressure, a check valve is equipped with in the exit of each evaporimeter, n-1 combination valve is equipped with in n operating room on refrigeration system, there are an evaporimeter and a temperature controller in each operating room.

The effect of combination valve is signal and the chosen temperature control sequence that gives according to each operating room's temperature controller, liquid refrigerant is sent into by above signal and the determined capillary of order, and enter in the continuous evaporimeter and evaporate, so each operating room's temperature can realize controlling respectively and regulating as required by the temperature controller of each operating room.

The effect of check valve is, when the higher evaporator operation of evaporating pressure, it can prevent that cold-producing medium from entering in the lower evaporimeter of evaporating pressure simultaneously, with the duty of guaranteeing combination valve and the operate as normal of refrigeration system.

The Resistance Value of every capillary is by being determined with the evaporating pressure of its evaporimeter that directly links to each other, because the evaporating pressure difference of each evaporimeter, therefore each Resistance Value capillaceous is also different, its flow is also just inequality, so the refrigerating capacity of compressor changes along with the difference of the capillary of duty and the evaporimeter that links to each other, thereby improved the average refrigerating capacity of compressor, shortened the working time of compressor, reached energy-conservation and prolonged the compressor purpose in service life.

Pressure switch can guarantee that the unloading of compressor starts.

Start button (" often opening " contact, the button that can return are automatically closed in drive) is used for refrigerator stop using after, temperature recovery reusing during in operating room's to environment temperature.

Accompanying drawing 1 is the longitudinal sectional view of combination valve, divide left and right sides two parts, right-hand member is a solenoid directional control valve, by shell (1), coil (2), spring (3), iron core (4), valve core rod (5), right valve seat (6), spool (7), valve core housing (8) and left valve seat (9) are formed, left end is that evacuation valve is by left valve seat (9), valve body (10), spool (11), packing (12), bellows (13) and (14), transmit screw (15), pressure sleeve (16) and tube connector (17) are formed, left side valve seat (9) has the left side of connection simultaneously, right two-part effect, tube connector (17) one ends are connected with pressure sleeve (16), the other end is connected on the pipeline between evaporator outlet and the check valve, the left end of valve body (10) has ring flange, is connected with pressure sleeve (16) with screw.

Its course of work is: cold-producing medium is entered by the inlet opening of valve core housing (8), when coil (2) does not have electric current to pass through, iron core (4) is under the effect of spring (3), push spool (7) to left end by valve core rod (5), make the pathway closure of left valve seat (9), cold-producing medium flows out from the fluid hole of right valve seat (6).When coil (2) had electric current to pass through, iron core (4) was attracted to right-hand member, drove the pathway closure of spool (7) with right valve seat (6).Cold-producing medium enters left valve seat (9), this moment is because the evacuation valve of left end still is in closed condition, cold-producing medium can not flow out from the fluid hole of valve body (10), when by pressure sleeve (16), transmit screw (15), pressure in the pressure chamber that bellows (14) and packing (12) are formed, when reducing along with the continuous air-breathing evaporimeter internal pressure reduction of compressor, the active force that transmits screw (15) right side is greater than the active force in the pressure chamber of left side, force spool (11) to be moved to the left, passage between spool (11) and the left valve seat (9) is opened, and cold-producing medium flows out from the fluid hole of valve body (10).

Fig. 2, Fig. 3 are one embodiment of the present of invention, and the present invention has been made further instruction.

Fig. 2 is the refrigeration system schematic diagram of three temperature, three control energy-saving electric refrigerators.

Shown in the figure: 1-compressor 2.-condenser 3.-device for drying and filtering 4.-pressure switch 5,6-combination valve 7.-muffler 8,13.-low temperature chamber capillary and evaporimeter 9,12.-medium temperature chamber capillary and evaporimeter 10,11.-hot room capillary and evaporimeter 14.-low temperature chamber evaporator outlet check valve 15.-medium temperature chamber evaporator outlet check valve

Fig. 3 is the electrical schematic diagram of three temperature, three control energy-saving electric refrigerators.

Shown in the figure: the contact HQ7-1-of the contact YLJ4-pressure switch (4) of contact WJ2, the WJ2-1 of WJ1, WJ1-1-low temperature chamber temperature controller, the contact WJ3 of WJ2-2-medium temperature chamber temperature controller, WJ3-1-hot room temperature controller is subjected to the actuating coil QA-start button of the actuating coil HQ7-control contact (HQ7-1) of the contact KQ5, KQ6-combination valve (5) of coil (HQ7) control and (6)

The state relation of each contact of temperature controller.

When WJ1 is closed → and WJ1-1 disconnects, when WJ1 disconnects → the WJ1-1 closure, and when WJ2 is closed → WJ2-1 closure, WJ2-2 disconnect, when WJ2 disconnects → WJ2-1 disconnects, the WJ2-2 closure, when WJ3 is closed → the WJ3-1 closure, when WJ3 disconnects → WJ3-1 disconnects.

Fig. 2, the course of work of three temperature, three control energy-saving electric refrigerators shown in Figure 3 is, if three selected operating room's temperature control sequences are, preferential control low temperature chamber, next is a medium temperature chamber, be hot room at last, when low, in, when the temperature of Senior Three chamber all is higher than the setting of each room temperature controller, the contact of each room temperature controller (WJ1) then, (WJ2), (WJ3), (WJ2-1), (WJ3-1) be in closure, (WJ1-1), (WJ2-2) be in disconnection, when the pressure of condenser (2) is lower than the setting valve of pressure switch (4), its contact (YLJ4) is closed (when reusing after stopping using, if condensing pressure is higher than setting valve, then use start button), compressor (1) starts, coil (HQ7) is connected, its contact (HQ7-1) closure, pressure rising along with condenser (2), the contact (YLJ4) of pressure switch (4) disconnects, because contact (HQ7-1) is in closure, therefore compressor (1) works on, coil (KQ5) and (KQ6) obstructed because contact (WJ1-1) disconnects, liquid refrigerant enters evaporimeter (13) evaporation by combination valve (5) and (6) through the capillary (8) of low temperature chamber, and steam is through the check valve (14) of low temperature chamber, evaporimeter of medium temperature chamber (12) and check valve (15), evaporimeter of hot room (11) and muffler (7) are got back to compressor (1).When the temperature of low temperature chamber is reduced to the setting of low temperature chamber temperature controller, contact (WJ1) automatic disconnection also drives contact (WJ1-1) closure, if the temperature of medium temperature chamber is not reduced to the setting of medium temperature chamber's temperature controller as yet, its contact (WJ2) then, (WJ2-1) still be in closure state, compressor (1) works on, the coil (KQ6) of combination valve (6) is connected because contact (WJ1-1) is closed, liquid refrigerant enters the left end of combination valve (6) through combination valve (5), because this moment, the evacuation valve of left end still was in closed condition, therefore liquid refrigerant can not enter the evaporimeter (12) of medium temperature chamber, when compressor (1) is taken out left liquid refrigerant at low temperature chamber evaporimeter (13) to the greatest extent and is made pressure be lower than the setting valve of evacuation valve, the evacuation valve of combination valve (6) is just opened, liquid refrigerant enters medium temperature chamber's evaporimeter (12) evaporation through capillary (9), low temperature chamber check valve (14) is under the effect of medium temperature chamber's evaporating pressure, be in closed condition, thereby prevent that cold-producing medium from entering low temperature chamber evaporimeter (13), guarantee normally carrying out of kind of refrigeration cycle.When the temperature of medium temperature chamber is reduced to the setting of medium temperature chamber's temperature controller, contact (WJ2) automatic disconnection also drives contact (WJ2-1) disconnection, (WJ2-2) closure, if the temperature of hot room is not reduced to the setting of hot room temperature controller as yet, its contact (WJ3) and (WJ3-1) still be in closure then, compressor (1) works on, the coil (KQ6) of combination valve this moment (6) is obstructed, the coil (KQ5) of combination valve (5) is connected because of contact (WJ2-2) is closed, liquid refrigerant enters the left end of combination valve (5), because the evacuation valve of left end is in closed condition, therefore cold-producing medium can not enter the evaporimeter (11) of hot room, when compressor (1) is taken out left liquid refrigerant at medium temperature chamber's evaporimeter (12) to the greatest extent, and when making pressure be lower than the setting valve of evacuation valve, the evacuation valve of combination valve (5) is just opened, liquid refrigerant enters hot room evaporimeter (11) evaporation through capillary (10), medium temperature chamber's check valve (15) is closed under the effect of hot room evaporating pressure, when the temperature of hot room is reduced to the setting of hot room temperature controller, contact (WJ3) automatic disconnection, and drive contact (WJ3-1) disconnects, because contact (WJ1), (WJ2), (WJ3) all disconnect, so compressor (1) quits work.The coil (KQ5) of combination valve (5) and (6), (KQ6) because of contact (WJ3-1), (WJ2-1) disconnection and obstructed, the liquid refrigerant of condenser (2) is under its pressure effect, drying filter (3) combination valve (5) and (6), capillary (8) enters low temperature chamber evaporimeter (13), when the pressure of condenser (2) is brought down below height, when medium temperature chamber's evaporimeter (11) reaches the pressure of (12), left at height, in the liquid refrigerant of warm evaporimeter (11) and (12) continue evaporation, air inlet by compressor (1), exhaust valve plate is got back to condenser (2), and continue to enter low temperature chamber evaporimeter (13), till the pressure of the pressure of condenser (2) and low temperature chamber evaporimeter (13) balances each other, the contact (YLJ4) of pressure switch (4) is connected, thereby the unloading that guarantees compressor (1) starts.

If when medium temperature chamber or hot room work, the temperature recovery of low temperature chamber is when being higher than the setting of low temperature chamber temperature controller, then closed, (WJ1-1) disconnection of its contact (WJ1), the coil (KQ5) of combination valve (5) and (6), (KQ6) disconnect obstructed because of contact (WJ1-1), liquid refrigerant enters low temperature chamber evaporimeter (13) evaporation through capillary (8) again, thereby has guaranteed temperature and the chosen temperature control sequence that sets up each operating room.

Claims (6)

1, the many controls of a kind of many temperature energy-saving electric refrigerator, its refrigeration system has compressor, condenser, device for drying and filtering, one or more capillary and one or more evaporimeter, and of the present invention being characterized as is equipped with combination valve and check valve on the refrigeration system.

2, refrigerator according to claim 1, it is characterized by, combination valve divides left and right sides two parts, right-hand member is a solenoid directional control valve, by shell (1), coil (2), spring (3), iron core (4), valve core rod (5), right valve seat (6), spool (7), valve core housing (8) and left valve seat (9) are formed, left end is an evacuation valve, by left valve seat (9), valve body (10), spool (11), packing (12), bellows (13) and (14), transmit screw (15), pressure sleeve (16) and tube connector (17) are formed, left side valve seat (9) has the two-part effect in the left and right sides of connection simultaneously, tube connector (17) one ends are connected with pressure sleeve (16), the other end is connected on the pipeline between evaporator outlet and the check valve, the left end of valve body (10) has ring flange, is connected with pressure sleeve (16) with screw.

3, refrigerator according to claim 1 is characterized by, and each evaporimeter has an independent capillary to be connected with combination valve.

4, refrigerator according to claim 1 is characterized by, and except that the highest evaporimeter of evaporating pressure, a check valve is equipped with in the exit of each evaporimeter in the refrigeration system.

5, refrigerator according to claim 1 is characterized by, and n-1 combination valve is equipped with in n operating room on refrigeration system.

6, refrigerator according to claim 1 is characterized by, and there is an evaporimeter each operating room.

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