CN222578607U - Freezer with free switching between freezing and refrigeration - Google Patents
Freezer with free switching between freezing and refrigeration Download PDFInfo
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- CN222578607U CN222578607U CN202421338549.7U CN202421338549U CN222578607U CN 222578607 U CN222578607 U CN 222578607U CN 202421338549 U CN202421338549 U CN 202421338549U CN 222578607 U CN222578607 U CN 222578607U
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- alternating current
- current contactor
- refrigerator
- temperature
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- 230000008014 freezing Effects 0.000 title claims abstract description 30
- 238000007710 freezing Methods 0.000 title claims abstract description 30
- 238000005057 refrigeration Methods 0.000 title description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 239000003507 refrigerant Substances 0.000 claims abstract description 4
- 239000000523 sample Substances 0.000 claims description 19
- 238000010257 thawing Methods 0.000 claims description 15
- 238000005485 electric heating Methods 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
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- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The utility model discloses a refrigerator capable of freely switching freezing and refrigerating, which comprises a first compressor, a second compressor, a condenser, a dry filter, a throttle valve and an evaporator, wherein a refrigerant outlet of the first compressor is sequentially connected with the condenser, the dry filter, the throttle valve and the evaporator, the second compressor is connected with the first compressor in parallel, and a control system comprises a knob switch, a first temperature controller, a second temperature controller, a first alternating-current contactor, a second alternating-current contactor, a third alternating-current contactor, a heating pipe and a time delay relay. The utility model has the advantages that only the switching of freezing and refrigerating can be realized by only poking the knob switch, the operation is simple and convenient, the whole system is realized by sharing one set of refrigerating pipeline by two compressors, the cost is lower, and the efficiency is higher.
Description
Technical Field
The utility model relates to refrigeration equipment, in particular to a refrigerator suitable for freely switching freezing and refrigerating.
Background
At present, the types of domestic commercial display refrigerators are becoming perfect. It is generally seen everywhere in supermarkets, convenience stores and even farmer market freezers. The refrigerators used for storing food generally mainly comprise two types, namely a refrigerator and a freezer, wherein the two types of refrigerators can meet the storage conditions of most food, but the storage space of the two types of refrigerators has certain refrigeration performance, and once a merchant finds that the storage space of the freezer is insufficient, the space of the refrigerator is left or the storage space of the freezer is insufficient, but the space of the freezer is left, and in such a case, the merchant can only purchase new refrigerators again to meet the requirements. That is, the user cannot change the refrigerating or freezing function of the refrigerator by himself, and it can be used only in a factory setting.
In order to solve the problem, the prior art shows that an electronic temperature controller is used on the freezer to realize the purpose of converting the freezer into a freezer for use in the refrigerator. However, the product can only be used for parameter setting of the electronic temperature controller by professional staff, general users cannot operate the electronic temperature controller, the popularization is not strong, and the scheme can only be used for changing the refrigerator into a refrigerated cabinet, but can not be used for changing the refrigerated cabinet into the refrigerated cabinet in turn, so that the limitation is obvious.
The other solution is to arrange two sets of refrigerating systems and two sets of control systems in one refrigerator, so that a user can select one set of refrigerating system to operate at any time according to the needs to realize free switching of the refrigerating and refrigerating functions. However, in the scheme, the two systems independently work without interference, so that the cost is high and the efficiency is low.
Disclosure of Invention
The utility model aims to provide a refrigerator capable of freely switching freezing and refrigerating, which is capable of freely switching freezing and refrigerating at any time, simple to operate, low in cost and high in efficiency.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The refrigerating system comprises a first compressor, a second compressor, a condenser, a dry filter, a throttle valve and an evaporator, wherein a refrigerant outlet of the first compressor is sequentially connected with the condenser, the dry filter, the throttle valve and the evaporator;
The control system comprises a knob switch, a first temperature controller, a second temperature controller, a first alternating current contactor, a second alternating current contactor, a third alternating current contactor, a heating pipe and a delay relay;
The first contact of the knob switch is connected with the first temperature controller, the second contact of the knob switch is connected with the second temperature controller, the first terminals of the first temperature controller and the second temperature controller are connected with the evaporator, the second terminals of the first temperature controller and the second temperature controller are connected with the first alternating current contactor, the first terminals of the first alternating current contactor are respectively connected with the first compressor and the condenser, the second terminals of the first alternating current contactor are connected with the second alternating current contactor through the delay relay to control the second compressor, and the third terminals of the second temperature controller are connected with the third alternating current contactor to control the heating pipe.
Further, the third contact is closed, the refrigerator stops working in a normal state, the refrigerator enters a refrigeration mode when the first contact is closed, and the refrigerator enters a freezing mode when the second contact is closed.
Further, in a refrigerating mode, the first temperature controller is electrified, an evaporator connected with a first terminal of the first temperature controller works, when a temperature control probe of the first temperature controller detects that the temperature of the refrigerator is higher than a first preset temperature, a first alternating current contactor connected with a second terminal of the first temperature controller is electrified, the first alternating current contactor first terminal controls the first compressor and the condenser to work, a second terminal of the first alternating current contactor controls a delay relay to be closed, after the closing time of the delay relay reaches a first delay time, the second alternating current contactor is electrified to control the second compressor to work, and when the temperature control probe of the first temperature controller detects that the temperature of the refrigerator is lower than the preset shutdown temperature, the first alternating current contactor is powered off, and the shutdown mode is entered.
Further, in a freezing mode, the second temperature controller is electrified, the evaporator connected with the first terminal of the second temperature controller works, when the temperature control probe of the second temperature controller detects that the temperature of the refrigerator is higher than a second preset temperature, the first alternating current contactor connected with the second terminal of the second temperature controller is electrified, the first alternating current contactor first terminal controls the first compressor and the condenser to work, the first alternating current contactor second terminal controls the delay relay to be closed, after the delay relay closing time reaches the first delay time, the second alternating current contactor is electrified, after the delay relay closing time reaches the second delay time, the second alternating current contactor is electrified, the second compressor is controlled to work, and when the temperature control probe of the second temperature controller detects that the temperature of the refrigerator is lower than the preset shutdown temperature, the first alternating current contactor is powered off, and the shutdown mode is entered.
Further, the delay relay cannot be closed during shutdown and defrosting operation of the refrigerator.
Further, the freezing mode adopts electric heating defrosting.
The utility model has the advantages that only the switching of freezing and refrigerating can be realized by only poking the knob switch, the operation is simple and convenient, the whole system is realized by sharing one set of refrigerating pipeline by two compressors, the cost is lower, and the efficiency is higher.
Drawings
Fig. 1 is a schematic diagram of a refrigeration system according to the present utility model.
Fig. 2 is a schematic diagram of a control system according to the present utility model.
Fig. 3 is a circuit embodiment of the control system according to the present utility model.
Detailed Description
The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The refrigerating system of the refrigerating and freezing freely-switched refrigerator is shown in fig. 1, and comprises a first compressor M1, a second compressor M2, a condenser 3, a dry filter 4, a throttle valve 5 and an evaporator 6, wherein a refrigerant outlet of the first compressor M1 is sequentially connected with the condenser 3, the dry filter 4, the throttle valve 5 and the evaporator 6, and the second compressor M2 is connected with the first compressor M1 in parallel.
The control system of the refrigerator capable of freely switching freezing and refrigerating comprises a knob switch SA, a first temperature controller, a second temperature controller, a first alternating-current contactor KM1, a second alternating-current contactor KM2, a third alternating-current contactor KM3, a heating pipe R1 and a delay relay KT.
The knob switch SA is in a normal state, the third contact is closed, and the refrigerator stops working. The refrigerator enters a refrigeration mode when the first contact is closed, and enters a freezing mode when the second contact is closed.
The first contact of the knob switch SA is connected with the first temperature controller. The first terminal of the first temperature controller is connected with the evaporator 6. The second terminal of the first temperature controller is connected with the first alternating current contactor KM 1. The first terminal of the first ac contactor KM1 is connected to the first compressor M1 and the condenser 3, respectively. The second terminal of the first ac contactor KM1 is connected to a delay relay KT. The delay relay KT is connected with the second alternating current contactor KM2 and controls the second compressor M2.
The second contact of the knob switch SA is connected with the second temperature controller. The first terminal of the second temperature controller is connected with the evaporator 6. The second terminal of the second temperature controller is connected with the first alternating current contactor KM 1. The first terminal of the first ac contactor KM1 is connected to the first compressor M1 and the condenser 3, respectively. The second terminal of the first ac contactor KM1 is connected to a delay relay KT. The delay relay KT is connected with the second alternating current contactor KM2 and controls the second compressor M2. The third terminal of the second temperature controller is connected with a third alternating current contactor KM3 to control a heating pipe R1.
When the first contact of the knob switch SA is closed and the refrigerator enters a refrigerating mode, the first temperature controller is electrified, and the evaporator 6 connected with the first terminal of the first temperature controller starts to work. When the temperature control probe of the first temperature controller detects that the temperature of the refrigerator is higher than a first preset temperature, the first alternating current contactor KM1 connected with the second terminal of the first temperature controller is electrified and connected, and then the first compressor M1 and the condenser 3 connected with the first terminal of the first alternating current contactor KM1 start to work. At this time, the delay relay KT connected to the second terminal of the first ac contactor KM1 is closed, and the operation is started. When the closing time of the delay relay KT reaches the first delay time, the second alternating current contactor KM2 connected with the delay relay KT is electrified, so that the second compressor M2 works.
When the temperature control probe of the first temperature controller detects that the temperature of the refrigerator is lower than the preset shutdown temperature, the first alternating current contactor KM1 is powered off, the first compressor M1 and the condenser 3 stop working, the delay relay KT is disconnected, the second compressor M2 also stops working, and the whole refrigerator enters a shutdown mode.
When the refrigerator operates in the refrigerating mode for a certain period of time, the refrigerator automatically enters into a shutdown defrosting stage. In the shutdown defrosting stage, the first compressor M1 and the condenser 3 stop working, the delay relay KT is disconnected, the second compressor M2 also stops working, the whole refrigerator enters into shutdown, and defrosting is realized by means of heat exchange between the refrigerator and the outside. Meanwhile, during the shutdown defrosting period, the temperature control probe of the first temperature controller detects that the temperature of the refrigerator rises, and when the temperature is higher than a first preset temperature, the first alternating current contactor KM1 still cannot be electrified to be connected until the shutdown defrosting period is finished.
When the second contact of the knob switch SA is closed and the refrigerator enters a freezing mode, the second temperature controller is electrified, and the evaporator 6 connected with the first terminal of the second temperature controller starts to work. When the temperature control probe of the second temperature controller detects that the temperature of the refrigerator is higher than a second preset temperature, the first alternating current contactor KM1 connected with the second terminal of the second temperature controller is electrified and connected, and then the first compressor M1 and the condenser 3 connected with the first terminal of the first alternating current contactor KM1 start to work. At this time, the delay relay KT connected to the second terminal of the first ac contactor KM1 is closed, and the operation is started. When the closing time of the delay relay KT reaches the second delay time, a second alternating current contactor KM2 connected with the delay relay is electrified, so that the second compressor M2 works.
When the temperature control probe of the second temperature controller detects that the temperature of the refrigerator is lower than the preset shutdown temperature, the first alternating current contactor KM1 is powered off, the first compressor M1 and the condenser 3 stop working, the delay relay KT is disconnected, the second compressor M2 also stops working, and the whole refrigerator enters a shutdown mode.
When the refrigerator operates in the freezing mode for a certain period of time, the refrigerator automatically enters the shutdown defrosting stage. In the shutdown defrosting stage, the first compressor M1 and the condenser 3 stop working, the delay relay KT is disconnected, the second compressor M2 also stops working, and the whole refrigerator enters into shutdown. Unlike the refrigeration mode, however, refrigeration systems typically employ electrically heated defrost. A third terminal of the second temperature controller is connected with a third alternating current contactor KM3 for controlling a heating pipe R1 to realize electric heating defrosting.
During the shutdown defrosting of the refrigerator in the freezing or refrigerating mode, even if the temperature control probe of the first temperature controller detects that the temperature of the refrigerator rises, the first alternating current contactor KM1 still cannot be electrified to be connected when the temperature of the refrigerator is higher than the second preset temperature or the first preset temperature, and the normal running state can not be recovered until the shutdown defrosting period is finished.
According to the utility model, in one refrigerator, the free switching of the freezing and refrigerating functions of a single refrigerator is realized through one refrigerating system and two control systems, so that the use requirements of different scenes of customers are greatly met, and the cost is lower.
Meanwhile, in the utility model, the application of the delay relay KT is very ingenious. In the refrigerating mode, when the delay time of the delay relay KT is set to be shorter, the first compressor M1 and the second compressor M2 can refrigerate the system together, so that the refrigerating speed of the refrigerating mode is greatly improved. When the delay time of the energizing delay relay is set longer (i.e. the delay time is longer than the time required for refrigerating the refrigerator by one compressor alone and pulling the temperature of the refrigerator down to the shutdown temperature value set by the system), the load end of the delay relay KT will always not be energized, that is to say the coil of the second ac contactor KM2 will never be energized, the second compressor M2 will always not be operated, and at this time the refrigerating mode will always be provided with refrigeration by a single first compressor M1. Although the refrigerating speed of a single compressor is reduced, the energy saving aspect is obviously improved.
As shown in fig. 3, a specific circuit connection embodiment of the control system of the present utility model is shown. Wherein XP1 is the terminal strip, evap is the evaporimeter probe, room is temperature controller temperature probe, SA is knob switch, KT is circular telegram time delay relay, F1 represents evaporation fan, F2 represents condensation fan. M1 and M2 are the first compressor and the second compressor, respectively. QF is the earth leakage protector. R1 is a heating pipe. KM1 is an ac contactor for the first compressor, KM2 is an ac contactor for the second compressor, and KM3 is an ac contactor for defrosting.
In fig. 3, a temperature controller 1 is a controller of a refrigerating system, a temperature controller 2 is a controller of a freezing system, and the temperature controllers 1 and 2 realize the switching of refrigerating and freezing functions through a knob switch SA. In the conventional state, the knob switch SA is in the middle, the temperature controllers 1 and 2 are not powered, and the refrigerating system does not work.
When the knob switch SA is dialed to one side of the temperature controller 1, the temperature controller 1 is electrified, the refrigerating system starts to work, the Fan in the temperature controller 1 is electrically closed, the evaporation Fan F1 of the refrigerator starts to operate, when the temperature of the refrigerator detected by the temperature control probe Room of the temperature controller 1 is higher than a starting temperature value set by the system, the Comp electric shock in the temperature controller 1 is closed, the coil of the alternating current contactor KM1 is electrified, the main contact of the alternating current contactor KM1 is closed, on one hand, the load compressor M1 and the condensation Fan F2 start to operate, the system starts to refrigerate, on the other hand, the coil of the electrifying delay relay KT is electrified, the working is started, the load end of the electrifying delay relay KT is electrified after a period of time (delay time of KT), so that the coil of the alternating current contactor KM2 is electrified, then the main contact of the alternating current contactor KM2 is closed, the compressor M2 also starts to work, at the moment, the whole refrigerating system is completely started, the refrigerator enters a quick refrigeration mode, when the temperature of the refrigerator detected by a temperature control probe Room of the temperature controller 1 is lower than a shutdown temperature value set by a system according to a parameter set value of the temperature controller 1, a Comp contact of the temperature controller 1 is disconnected, a coil of an alternating current contactor KM1 is powered off, a main contact of the alternating current contactor KM1 is disconnected, on one hand, a compressor M1 and a condensing Fan F2 are stopped, on the other hand, a coil of an electrifying delay relay KT is powered off, a load end of the KT is also disconnected, so that the coil of the alternating current contactor KM2 is powered off, the main contact of the alternating current contactor KM2 is disconnected, the compressor M2 is also stopped to work, at the moment, the refrigeration of the whole system is closed, the temperature of the refrigerator is continuously increased because of heat exchange with the outside, and when the temperature of the refrigerator is only risen to the startup temperature value set by the system, the Comp contact of the temperature controller 1 is closed again, and refrigeration is started, the above process is started to be repeated, and the refrigeration requirement of the customer is met.
When the knob switch SA is shifted to one side of the temperature controller 2, the temperature controller 2 is powered on, the temperature controller 1 is powered off, and the refrigerating system starts to work. Fan in temperature controller 2 gets electric shock closed, and the evaporating Fan F1 of freezer starts to operate, and when the temperature of the freezer that temperature control probe Room of temperature controller 2 detected is higher than the start temperature value that the system set for, the Comp in temperature controller 2 gets electric shock closed, ac contactor KM1 coil gets the electricity, ac contactor KM 1's main contact circular telegram, load compressor M1 and condensing Fan F2 start to operate afterwards, load compressor M2 also starts to operate after a while, and the opening and closing process of refrigerating system above are basically the same.
Claims (6)
1. A refrigerator capable of freely switching freezing and refrigerating is characterized in that a refrigerating system comprises a first compressor, a second compressor, a condenser, a dry filter, a throttle valve and an evaporator, wherein a refrigerant outlet of the first compressor is sequentially connected with the condenser, the dry filter, the throttle valve and the evaporator;
The control system comprises a knob switch, a first temperature controller, a second temperature controller, a first alternating current contactor, a second alternating current contactor, a third alternating current contactor, a heating pipe and a delay relay;
The first contact of the knob switch is connected with the first temperature controller, the second contact of the knob switch is connected with the second temperature controller, the first terminals of the first temperature controller and the second temperature controller are connected with the evaporator, the second terminals of the first temperature controller and the second temperature controller are connected with the first alternating current contactor, the first terminals of the first alternating current contactor are respectively connected with the first compressor and the condenser, the second terminals of the first alternating current contactor are connected with the second alternating current contactor through the delay relay to control the second compressor, and the third terminals of the second temperature controller are connected with the third alternating current contactor to control the heating pipe.
2. The refrigerator with free switching between freezing and refrigerating according to claim 1, wherein the knob switch is normally closed, the third contact is closed, the refrigerator stops working, the refrigerator enters a refrigerating mode when the first contact is closed, and the refrigerator enters a freezing mode when the second contact is closed.
3. The refrigerator capable of freely switching between freezing and refrigerating is characterized in that in a refrigerating mode, the first temperature controller is electrified, an evaporator connected with a first terminal of the first temperature controller works, when a temperature control probe of the first temperature controller detects that the temperature of the refrigerator is higher than a first preset temperature, a first alternating current contactor connected with a second terminal of the first temperature controller is electrified, the first alternating current contactor first terminal controls a first compressor and a condenser to work, the first alternating current contactor second terminal controls a delay relay to be closed, after the delay relay closing time reaches a first delay time, the second alternating current contactor is electrified to control the second compressor to work, and when the temperature control probe of the first temperature controller detects that the temperature of the refrigerator is lower than the preset shutdown temperature, the first alternating current contactor is powered off and enters a shutdown mode.
4. The refrigerator capable of freely switching between freezing and refrigerating is characterized in that in a freezing mode, the second temperature controller is electrified, an evaporator connected with a first terminal of the second temperature controller works, when a temperature control probe of the second temperature controller detects that the temperature of the refrigerator is higher than a second preset temperature, a first alternating current contactor connected with a second terminal of the second temperature controller is electrified, a first terminal of the first alternating current contactor controls a first compressor and a condenser to work, a second terminal of the first alternating current contactor controls a delay relay to be closed, after the delay relay closing time reaches the first delay time, the second alternating current contactor is electrified, after the delay relay closing time reaches the second delay time, the second alternating current contactor is electrified, the second compressor is controlled to work, and when the temperature control probe of the second temperature controller detects that the temperature of the refrigerator is lower than the preset shutdown temperature, the first alternating current contactor is powered off, and the refrigerator enters a shutdown mode.
5. A refrigerator with free switching between freezing and refrigerating according to claim 4 or 3, wherein the delay relay cannot be closed during the operation time of stopping the refrigerator for defrosting.
6. The refrigerator with freely switched freezing and refrigerating functions according to claim 2, wherein the refrigerator adopts electric heating defrosting in a freezing mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421338549.7U CN222578607U (en) | 2024-06-13 | 2024-06-13 | Freezer with free switching between freezing and refrigeration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421338549.7U CN222578607U (en) | 2024-06-13 | 2024-06-13 | Freezer with free switching between freezing and refrigeration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222578607U true CN222578607U (en) | 2025-03-07 |
Family
ID=94790571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421338549.7U Active CN222578607U (en) | 2024-06-13 | 2024-06-13 | Freezer with free switching between freezing and refrigeration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222578607U (en) |
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2024
- 2024-06-13 CN CN202421338549.7U patent/CN222578607U/en active Active
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