CN201177434Y

CN201177434Y - Direct-freezing refrigerator

Info

Publication number: CN201177434Y
Application number: CNU2007200285694U
Authority: CN
Inventors: 王东宁; 阎志建; 宋清波
Original assignee: Haier Group Corp; Qingdao Haier Co Ltd
Current assignee: Haier Group Corp; Qingdao Haier Co Ltd
Priority date: 2007-09-30
Filing date: 2007-09-30
Publication date: 2009-01-07
Anticipated expiration: 2017-09-30

Abstract

The utility model discloses a direct cooling type refrigerator which comprises a refrigerating chamber, a temperature change chamber and a freezing chamber, wherein the refrigerating chamber and the temperature change chamber are respectively provided with a temperature controller; moreover, a normally open contact of the temperature controller of the refrigerating chamber controls a power supply loop of a compressor; a normally close contact of the temperature controller of the refrigerating chamber is connected with a power supply loop of an electromagnetic valve in series; a normally open contact of the temperature controller of the temperature change chamber controls two middle relays; a normally open contact of one of the two relays and the normally close contact of the temperature controller of the refrigerating chamber are connected in series to the power supply loop of the electromagnetic valve; and a normally open contact of the other relay is connected with two ends of the normally open contact of the temperature controller of the refrigerating chamber in parallel. The direct cooling type refrigerator can realize the separate control of the refrigerating chamber and the temperature change chamber; and the temperature change chamber can realize large-scale stepless temperature change between soft refrigeration and refrigeration.

Description

A kind of direct cooling refrigerator

Technical field

The utility model relates to refrigerating field, relates in particular to a kind of direct cooling refrigerator.

Background technology

In the prior art, the refrigeration control procedure that comprises the refrigerator of refrigerating chamber and temperature-changing chamber is mostly when refrigerating chamber need freeze, start compressor, after cold-producing medium flows out from compressor through refrigerator evaporator, freeze through the temperature-changing chamber evaporimeter again, finally get back to compressor by freezer evaporator, what temperature-changing chamber can only be passive like this freezes along band, and, when temperature-changing chamber needs refrigeration, and this moment refrigerating chamber when not needing to freeze, thereby need improve the operation ratio of compressor and then reach the temperature that temperature-changing chamber needs by the temperature that heater strip improves refrigerating chamber.Like this, temperature-changing chamber and refrigerating chamber can not independently be controlled, and can't freeze the refrigeration that does not also reach flexibly.

Most of band temperature-changing chamber refrigerators in the market generally are to control by the computer plate.But based on reasons such as cost, performances own, can only realize with 1 ℃ be the adjustment of unit, be not stepless alternating temperature fully truly.

The utility model content

Technical problem to be solved in the utility model is to provide a kind of refrigerator that can realize that refrigerating chamber and temperature-changing chamber are independently controlled, realizes stepless alternating temperature truly.

In order to address the above problem, the utility model proposes a kind of direct cooling refrigerator, comprise refrigerating chamber, temperature-changing chamber and refrigerating chamber, wherein, described refrigerating chamber and temperature-changing chamber are equipped with temperature controller, and, the current supply circuit of the normally opened contact control compressor of described refrigerating chamber temperature controller, the normally-closed contact of described refrigerating chamber temperature controller is series at the current supply circuit of magnetic valve, at least two relays of normally opened contact control of described temperature-changing chamber temperature controller, the normally-closed contact of the normally opened contact of one of them relay and described refrigerating chamber temperature controller is series at the current supply circuit of described magnetic valve, and the normally opened contact of another relay is parallel to the normally opened contact two ends of described refrigerating chamber temperature controller.

Wherein, described temperature controller is a mechanical thermostat.

Preferably, described mechanical thermostat is the pressure type mechanical thermostat.

Wherein, described mechanical thermostat is provided with stepless rotation adjusting knob, and the temperature-sensing element of described mechanical thermostat is arranged at surface or its peripheral thermometric field of corresponding evaporator.

Wherein, the rotation adjusting knob of described temperature-changing chamber mechanical thermostat is realized stepless alternating temperature by the extension spring that transmission mechanism connects in the described mechanical thermostat with the pulling force of regulating this extension spring.

Wherein, described refrigerating chamber temperature controller normally opened contact and described normally-closed contact are specially the interlocking contact.

In addition, the refrigeration system of described refrigerator comprises compressor, the condenser, device for drying and filtering and the magnetic valve that connect described compressor successively, a branch road of described magnetic valve connects refrigerator evaporator through capillary, another of described magnetic valve branch road connects described temperature-changing chamber evaporimeter through capillary, the delivery outlet of described refrigerator evaporator and described temperature-changing chamber evaporimeter is connected refrigerating evaporator jointly, and the delivery outlet of this freezer evaporator connects described compressor.

Implement the utility model, can realize the independent control of refrigerating chamber and temperature-changing chamber, and described temperature-changing chamber can be realized large-scale stepless alternating temperature between freezing and freezing soft.

Description of drawings

Fig. 1 is the schematic diagram of an embodiment of a kind of direct cooling refrigerator of the utility model;

Fig. 2 is the structure chart of an embodiment of the refrigeration system of refrigerator shown in Figure 1;

Fig. 3 is the structure chart of an embodiment of the control circuit of refrigerator shown in Figure 1.

The specific embodiment

With reference to figure 1, illustrate the schematic diagram of an embodiment of a kind of direct cooling refrigerator of the utility model.As shown in the figure, this direct cooling refrigerator is a three-door refrigerator, is refrigerating chamber 1, temperature-changing chamber 2, refrigerating chamber 3 from top to bottom successively.Be provided with mechanical thermostat in the described refrigerating chamber 1, this mechanical thermostat can be arranged in the sidewall or roof of refrigerating chamber 1, and its rotation adjusting knob is exposed to the selection of the pattern that refrigerates for the user in the space of refrigerating chamber 1, its temperature-sensing element is arranged at the surface of described refrigerator evaporator or in its peripheral temperature-sensitive field, described temperature-sensing element can be temperature-sensitive capsule or thermistor etc.

Also be provided with mechanical thermostat in the described temperature-changing chamber 2, this mechanical thermostat can be arranged in the sidewall or roof of temperature-changing chamber 2, and its rotation adjusting knob is exposed in the memory space of temperature-changing chamber 2 and carries out adjustment for the user, owing to be mechanical thermostat, therefore the adjustment of described rotation adjusting knob is a mechanical adjustment, so can realize stepless alternating temperature, its temperature regulating range can be at-7 ℃ in an embodiment of the present utility model--18 ℃ are carried out stepless alternating temperature.Wherein, described mechanical thermostat can adopt compression-type temperature controller, the rotation adjusting knob of this compression-type temperature controller is connected with transmission mechanism, when the user uses described rotation adjusting knob to regulate as required, the amount that described transmission mechanism rotates this button with the user is passed to the extension spring of this compression-type temperature controller, the mobile range of push rod is being controlled in the change of the pulling force of described extension spring, thereby and then the break-make of control temperature controller contact realize control to the compressor start-stop; Wherein, described transmission mechanism can adopt worm geared mode.

It should be noted that described mechanical temperature controller can also realize no matter which kind of temperature controller is all at protection domain of the present utility model with the electronics temperature controller.

With reference to figure 2, illustrate the structure of an embodiment of the refrigeration system of refrigerator shown in Figure 1.As shown in the figure, comprise compressor 20, the dew removing tube 21, condenser 22 and the device for drying and filtering 23 that connect compressor 20 successively, the magnetic valve 24 that connects this device for drying and filtering 23, this magnetic valve 24 is a two way solenoid valve, branch road when it is failure to actuate connects capillary 201, and the branch road during action connects capillary 202; Described capillary 201 connects the input port of refrigerator evaporator 25, described capillary 202 connects the input port of temperature-changing chamber evaporimeter 26, the common tandem of delivery outlet of described refrigerator evaporator 25 delivery outlets and temperature-changing chamber evaporimeter 26 is in the input port of freezer evaporator 27, and the delivery outlet of this freezer evaporator 27 connects described compressor 20.

With reference to figure 3, illustrate the structure of an embodiment of the control circuit of refrigerator shown in Figure 1.As shown in the figure, the implication of the symbol of at first using in the key diagram:

MKG is a door switch; DENG is a lamp; Tc and Tc ' are the interlocking contact of refrigerating chamber temperature controller, and Tc stops the contact for refrigeration, and Tc ' is the refrigeration contact; Tz is a temperature-changing chamber temperature controller operating contact; KA1 is a relay coil, and KA1 ' is the action contact of this relay; KA2 is a relay coil, and KA2 ' is the action contact of this relay; DCF is a magnetic valve; YSJ is a compressor; L represents live wire; N represents zero line; Elaborate its annexation below.

Described compressor YSJ has two current supply circuits, and wherein one is inserted Tc ' control, and another inserts KA1 ' control; Described magnetic valve DCF has only a current supply circuit, and its Tc and KA2 ' by mutual series connection jointly controls; Described Tz connects cross-over connection in described zero line N and live wire L jointly with two relay coil KA1, KA2, and described two relay coils are arranged in parallel; Described door switch MKG connects the back cross-over connection on described zero line N and live wire L with lamp DENG.

Elaborate the work and the control procedure of described refrigeration system below in conjunction with Fig. 1, Fig. 2 and Fig. 3.Simultaneously with reference to figure 1, Fig. 2 and Fig. 3, when refrigerator energising start, described refrigerating chamber temperature controller and temperature-changing chamber temperature controller detect the temperature of corresponding chamber, when the refrigerating chamber temperature controller detects temperature of refrigerating chamber and is higher than design temperature, refrigerating chamber temperature controller contact Tc ' closure then, the work thereby compressor YSJ switches on, cold-producing medium is flowed out by compressor YSJ and process dew removing tube 21 like this, condenser 22 and device for drying and filtering 23 backs arrive magnetic valve 24, because Tc and Tc ' are interlock switch, therefore Tc disconnects at this moment, so magnetic valve 24 no powers, therefore can't move, so this moment, cold-producing medium entered refrigerator evaporator 25 through capillary 201 place branch roads, and finally got back to compressor YSJ through freezer evaporator 27, repeated above-mentioned circulation and reached setting value up to the detected temperature of refrigerating chamber temperature controller.Above-mentioned process of refrigerastion is that refrigerating chamber is preferential, and promptly no matter whether temperature-changing chamber reaches design temperature, if refrigerating chamber does not reach design temperature, and then preferential refrigerating chamber refrigeration.

After above-mentioned refrigerating chamber refrigeration reaches the temperature of setting, then refrigerating chamber temperature controller control Tc ' disconnects, Tc is closed simultaneously, if temperature-changing chamber temperature controller detection this moment temperature-changing chamber temperature does not reach setting value, then the temperature-changing chamber temperature controller is controlled the Tz closure, and then relay coil KA1, KA2 gets, thereby make action contact KA1 ', KA2 ' closure, because the closure of KA1 ' makes compressor YSJ energising work, after cold-producing medium flows out from compressor YSJ through dew removing tube 21, condenser 22, device for drying and filtering 23 backs arrive magnetic valve 24, because KA2 ' closure and Tc closure, therefore magnetic valve DCF energising action, so cold-producing medium flows into temperature-changing chamber evaporimeter 26 through capillary 202 place branch roads, and finally get back to compressor YSJ through behind the freezer evaporator 27, repeat above-mentioned process and reach setting value up to the temperature-changing chamber temperature, described temperature-changing chamber desired temperature is set by the rotation adjusting knob by the user and can be realized stepless alternating temperature.In said process, if after the refrigerating chamber temperature controller detects its temperature and is higher than setting value, then it repeats the process of described refrigerating chamber refrigeration, meanwhile, because magnetic valve DCF can't get electric temperature-changing chamber and can't freeze.

By above description as can be seen, the refrigerator in this specific embodiment comprises two circulations, realizes by a magnetic valve.In another embodiment of the present utility model, magnetosensitive switch and heater strip can be set in described refrigerating chamber and temperature-changing chamber, freeze to control refrigerator more flexibly,, therefore no longer set forth in more detail with regard to details because this is a technology known in the field.In addition, described relay can adopt auxiliary reclay.

Above disclosed only is a kind of preferred embodiment of the utility model, can not limit the interest field of the utility model certainly with this, and therefore the equivalent variations of being done according to the utility model claim still belongs to the scope that the utility model is contained.

Claims

1, a kind of direct cooling refrigerator, comprise refrigerating chamber, temperature-changing chamber and refrigerating chamber, it is characterized in that, described refrigerating chamber and temperature-changing chamber are equipped with temperature controller, and, the current supply circuit of the normally opened contact control compressor of described refrigerating chamber temperature controller, the normally-closed contact of described refrigerating chamber temperature controller is series at the current supply circuit of magnetic valve, at least two relays of normally opened contact control of described temperature-changing chamber temperature controller, the normally-closed contact of the normally opened contact of one of them relay and described refrigerating chamber temperature controller is series at the current supply circuit of described magnetic valve, and the normally opened contact of another relay is parallel to the normally opened contact two ends of described refrigerating chamber temperature controller.

2, refrigerator as claimed in claim 1 is characterized in that, described temperature controller is a mechanical thermostat.

3, refrigerator as claimed in claim 2 is characterized in that, described mechanical thermostat is the pressure type mechanical thermostat.

As claim 2 or 3 described refrigerators, it is characterized in that 4, described mechanical thermostat is provided with stepless rotation adjusting knob, and the temperature-sensing element of described mechanical thermostat is arranged at surface or its peripheral thermometric field of corresponding evaporator.

5, refrigerator as claimed in claim 4 is characterized in that, the rotation adjusting knob of described temperature-changing chamber mechanical thermostat is realized stepless alternating temperature by the extension spring that transmission mechanism connects in the described mechanical thermostat with the pulling force of regulating this extension spring.

As each described refrigerator in the claim 1,2,3, it is characterized in that 6, described refrigerating chamber temperature controller normally opened contact and described normally-closed contact are specially the interlocking contact.

7, as each described refrigerator in the claim 1,2,3, it is characterized in that, the refrigeration system of described refrigerator comprises compressor, the condenser, device for drying and filtering and the magnetic valve that connect described compressor successively, a branch road of described magnetic valve connects refrigerator evaporator through capillary, another of described magnetic valve branch road connects described temperature-changing chamber evaporimeter through capillary, the delivery outlet of described refrigerator evaporator and described temperature-changing chamber evaporimeter is connected refrigerating evaporator jointly, and the delivery outlet of this freezer evaporator connects described compressor.

8, refrigerator as claimed in claim 4, it is characterized in that, the refrigeration system of described refrigerator comprises compressor, the condenser, device for drying and filtering and the magnetic valve that connect described compressor successively, a branch road of described magnetic valve connects refrigerator evaporator through capillary, another of described magnetic valve branch road connects described temperature-changing chamber evaporimeter through capillary, the delivery outlet of described refrigerator evaporator and described temperature-changing chamber evaporimeter is connected refrigerating evaporator jointly, and the delivery outlet of this freezer evaporator connects described compressor.

9, refrigerator as claimed in claim 5, it is characterized in that, the refrigeration system of described refrigerator comprises compressor, the condenser, device for drying and filtering and the magnetic valve that connect described compressor successively, a branch road of described magnetic valve connects refrigerator evaporator through capillary, another of described magnetic valve branch road connects described temperature-changing chamber evaporimeter through capillary, the delivery outlet of described refrigerator evaporator and described temperature-changing chamber evaporimeter is connected refrigerating evaporator jointly, and the delivery outlet of this freezer evaporator connects described compressor.

10, refrigerator as claimed in claim 6, it is characterized in that, the refrigeration system of described refrigerator comprises compressor, the condenser, device for drying and filtering and the magnetic valve that connect described compressor successively, a branch road of described magnetic valve connects refrigerator evaporator through capillary, another of described magnetic valve branch road connects described temperature-changing chamber evaporimeter through capillary, the delivery outlet of described refrigerator evaporator and described temperature-changing chamber evaporimeter is connected refrigerating evaporator jointly, and the delivery outlet of this freezer evaporator connects described compressor.