CN114188185A - Timing switch circuit of mechanical direct-cooling single-system refrigerator - Google Patents
Timing switch circuit of mechanical direct-cooling single-system refrigerator Download PDFInfo
- Publication number
- CN114188185A CN114188185A CN202111370364.5A CN202111370364A CN114188185A CN 114188185 A CN114188185 A CN 114188185A CN 202111370364 A CN202111370364 A CN 202111370364A CN 114188185 A CN114188185 A CN 114188185A
- Authority
- CN
- China
- Prior art keywords
- contact
- temperature
- bimetallic strip
- switch circuit
- timing switch
- Prior art date
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- Pending
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- 238000001816 cooling Methods 0.000 title claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 238000005452 bending Methods 0.000 claims abstract description 7
- 238000007710 freezing Methods 0.000 description 8
- 230000008014 freezing Effects 0.000 description 8
- 238000005057 refrigeration Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000003507 refrigerant Substances 0.000 description 5
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 208000001034 Frostbite Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
- H01H43/30—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention discloses a timing switch circuit of a mechanical direct cooling single system refrigerator, wherein a heating wire and a thermosensitive bimetallic strip are connected in series, the heating wire is connected in series with a temperature controller, a second contact is connected in series with a compressor, a first contact is arranged on the thermosensitive bimetallic strip, the second contact is arranged on one side of the first contact, the thermosensitive bimetallic strip is in a bending state at normal temperature, the first contact is in contact with the second contact, and the timing switch circuit is in a connection state at the moment; after the timing switch circuit is switched on, the heating wire is heated, so that the temperature of the thermosensitive bimetallic strip rises, the first contact is separated from the second contact after the temperature of the thermosensitive bimetallic strip reaches the deformation temperature, and the timing switch circuit is switched off. The utility model discloses very big improvement the practicality of mechanical direct cooling single system refrigerator, promoted user and used experience.
Description
The technical field is as follows:
the invention relates to a timing switch circuit of a mechanical direct cooling single-system refrigerator.
Background art:
the mechanical direct-cooling single-system refrigerator in the current market controls the connection and disconnection of a compressor circuit through a temperature controller switch to achieve the aim of controlling the temperature of the refrigerator; generally, the temperature sensing end of the temperature controller of the scheme is placed on the refrigeration evaporator; the refrigerant passes through the freezer evaporator before reaching the cold room evaporator.
In the actual use process, the scheme is easy to cause the problem of non-stop, such as:
firstly, the method comprises the following steps: the ambient temperature is too high, the refrigerator is easy to stop
As the ambient temperature increases, the heat load of the refrigerator increases; therefore, when the ambient temperature is too high, a large amount of refrigerant evaporates in the freezing chamber, and the amount of low-temperature refrigerant reaching the refrigerating evaporator decreases greatly. This often leads to the cold-stored evaporimeter temperature can't drop to the stop point to appear the temperature controller and do not move, the compressor is not stopped, and the cold-stored temperature of refrigerator is less than zero degree, the frozen result of bad, this is very bad use experience to the user.
II, secondly: when the cold chamber is filled with more food at normal temperature, the refrigerator is not stopped
After normal temperature food is put into the freezing chamber, the heat load of the freezing chamber is increased; during the next period of time, a large amount of refrigerant will evaporate in the freezer compartment and the amount of cryogenic refrigerant reaching the refrigeration evaporator is greatly reduced. This often results in the refrigerated evaporator temperature falling short of the shutdown point, resulting in the compressor not shutting down for a long period of time, resulting in a sustained drop in the refrigerated compartment temperature below zero degrees.
After the normal temperature food is frozen to the temperature of the freezing chamber, the refrigerator can be normally opened and shut down, and the refrigerating temperature can be also normally recovered; however, in the process of freezing the normal-temperature food, the temperature in the refrigerating chamber is lower than zero for a long time, irreversible frostbite is generated on the food stored in the refrigerating chamber, and the use experience of a user is seriously influenced.
For the current mechanical direct cooling single system refrigerator, the reason is also the bottleneck of improving the freezing capacity.
In order to solve the problems, some manufacturers have proposed a single-system direct-cooling refrigerator scheme with electronic temperature control, but the cost of components such as a switch circuit board, a temperature sensor and the like of the electronic temperature control scheme is high, and control software of the electronic temperature control scheme also puts forward high requirements on enterprises.
The invention content is as follows:
the invention provides a timing switch circuit of a mechanical direct cooling single-system refrigerator for solving the problems in the prior art.
The technical scheme adopted by the invention is as follows:
a timing switch circuit of a mechanical direct cooling single system refrigerator is connected between a temperature controller and a compressor and comprises a heating wire, a thermosensitive bimetallic strip, a first contact and a second contact, wherein the heating wire is connected with the thermosensitive bimetallic strip in series, the heating wire is connected with the temperature controller in series, the second contact is connected with the compressor in series, the first contact is arranged on the thermosensitive bimetallic strip, the second contact is arranged on one side of the first contact, the thermosensitive bimetallic strip is in a bending state at normal temperature and enables the first contact to be in contact with the second contact, and the timing switch circuit is in a connection state at the moment;
after the timing switch circuit is switched on, the heating wire is heated, so that the temperature of the thermosensitive bimetallic strip rises, the first contact is separated from the second contact after the temperature of the thermosensitive bimetallic strip reaches the deformation temperature, and the timing switch circuit is switched off.
Furthermore, the heating wire, the thermosensitive bimetallic strip, the first contact and the second contact are all arranged in one shell.
Further, the thermosensitive bimetal is in a circular arc bending state at normal temperature.
Further, the outer arc surface of the thermosensitive bimetal in the arc bending state faces the second contact.
Further, the first contact is arranged on the outer arc surface of the thermosensitive bimetallic strip.
Further, the first contact and the second contact are both soldered to the timer switch circuit.
The invention has the following beneficial effects:
the circuit timing switch of the refrigerator solves the problems that the original control scheme of the mechanical direct-cooling single-system refrigerator is easy to stop, the refrigerating chamber is supercooled, the freezing capacity is insufficient and the like, greatly improves the practicability of the mechanical direct-cooling single-system refrigerator, and improves the use experience of a user. In addition, compared with an electric control solution scheme with the same problem, the invention has the advantages of lower cost, lower technical threshold and higher reliability.
Description of the drawings:
fig. 1 is a schematic diagram of a circuit timing switch of a refrigerator according to the present invention.
Fig. 2 is a schematic diagram of a switching circuit using the present invention.
FIG. 3 is a circuit diagram of the switch circuit of the present invention connected between the temperature controller and the compressor.
Fig. 4 is a circuit diagram of a refrigerating temperature compensating heating wire to be added using the present invention.
The specific implementation mode is as follows:
the invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, the timing switch circuit of a mechanical direct cooling single system refrigerator of the present invention includes a heating wire 1, a thermal bimetal 2, a first contact 3 and a second contact 4. The heating wire, the thermosensitive bimetallic strip, the first contact and the second contact are all arranged in one shell 5.
And the heating wire provides a heat source for the timing switch after the circuit is switched on.
The thermosensitive bimetallic strip realizes the connection and disconnection of the first contact and the second contact of the timing switch through the action of the thermosensitive bimetallic strip, and the thermosensitive bimetallic strip is specifically as follows:
the thermosensitive bimetallic strip is in a bent state at normal temperature, the first contact and the second contact are contacted, and the switch is in a connected state (as shown in figure 1);
when the circuit is connected, the temperature of the heat-sensitive bimetallic strip begins to rise under the heat provided by the heating wire. Assuming that the temperature of the thermal bimetal exceeds the action temperature after the time X, the first contact and the second contact are separated under the driving of the action of the thermal bimetal, and the switch is in an off state (as shown in fig. 2);
after the circuit is disconnected, the heating wire does not provide heat any more, and the temperature of the timing switch begins to be reduced. Assuming that the temperature of the thermal bimetal drops to the recovery temperature after the time Y, the first contact and the second contact are contacted under the driving of the action of the thermal bimetal, and the switch is in the on state again (as shown in fig. 1);
therefore, the on-off action of the timing switch is realized; the adjustment of the on-off time parameter X, Y of the timing switch can be realized by adjusting the power of the heating wire, the heat preservation coefficient of the shell, the action temperature of the thermosensitive bimetallic strip and the like.
Referring to fig. 3, the switch circuit of the invention is connected between a temperature controller 7 and a compressor 6, the compressor provides cold energy for the refrigerator, the switch circuit is switched on, the compressor is started, and the refrigerator starts to refrigerate; the switch circuit is disconnected, the compressor stops, and the refrigerator stops refrigerating.
The temperature sensing end of the temperature controller is arranged on the refrigeration evaporator, and when the temperature of the temperature sensing end is reduced to a stop point, the temperature controller acts and the switching circuit is disconnected; when the temperature of the temperature sensing end rises to the starting point, the temperature controller acts, and the switch in the switch circuit is switched on.
The timing switch is connected in series after temperature control, and works according to the on-time X and the off-time Y after being electrified.
Taking the example that the timing switch parameter is set to be X120 min and Y20 min, the working principle of the invention for solving the problems of the original scheme is as follows:
the starting time of the normal running direct cooling single system refrigerator is less than 120 min. Therefore, in the running process of the refrigerator, the timing switch is always in the on state, and the start and stop of the refrigerator are completely controlled by the temperature controller.
If the refrigerator is influenced by external factors (the ambient temperature is too high, and a large amount of heat load is put into the freezing chamber), the temperature of the refrigeration evaporator is not reduced to the shutdown point after the refrigerator is started for 120min, and the temperature controller does not act at the moment.
Because the switch circuit of the invention is provided with the timing switch, the timer is controlled according to the on 120min and off 20min after the temperature controller is connected with the circuit. When the on-time of the temperature controller exceeds 120min, the timer enters a 20min off-state; the whole compressor switching circuit is disconnected due to the disconnection of the timing switch, and the temperature of the refrigerating chamber begins to rise, so that the problem that the starting time of the refrigerator is too long is solved.
After the temperature controller is switched on for more than 140min, the timing switch enters the switching-on state again, the whole compressor switching circuit is switched on, and the refrigerator recovers normal refrigeration.
After external influence factors are eliminated, the starting time of the compressor does not exceed 120min, the timing switch does not participate in the action in the whole process, and the normal refrigeration of the refrigerator is not influenced.
In addition, in the scheme of the invention, a refrigerating temperature compensation heating wire 8 can be added, the circuit diagram of the refrigerating temperature compensation heating wire is shown in fig. 4, and the refrigerating temperature compensation heating wire, the timing switch and the compressor are connected in parallel in a circuit.
Under the on state of the timing switch, the refrigerating temperature compensation heating wire is in a short-circuited state and cannot work due to the fact that the resistance of the compressor is very small;
when the running time of the compressor exceeds the set time X, the timing switch is turned off, and the heating wire is connected into the circuit to start working, so that the temperature of the refrigerating chamber is quickly and effectively increased, and the condition that the refrigerating chamber freezes food is avoided.
The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.
Claims (6)
1. The utility model provides a time switch circuit of mechanical direct cooling single system refrigerator, the connection of time switch circuit is between temperature controller and compressor, its characterized in that: the timing switch circuit comprises a heating wire, a thermosensitive bimetallic strip, a first contact and a second contact, wherein the heating wire and the thermosensitive bimetallic strip are connected in series, the heating wire is connected with a temperature controller in series, the second contact is connected with a compressor in series, the first contact is arranged on the thermosensitive bimetallic strip, the second contact is arranged on one side of the first contact, the thermosensitive bimetallic strip is in a bending state at normal temperature, the first contact is in contact with the second contact, and the timing switch circuit is in a connection state at the moment;
after the timing switch circuit is switched on, the heating wire is heated, so that the temperature of the thermosensitive bimetallic strip rises, the first contact is separated from the second contact after the temperature of the thermosensitive bimetallic strip reaches the deformation temperature, and the timing switch circuit is switched off.
2. The timing switching circuit of a mechanical direct-cooling single system refrigerator as claimed in claim 1, wherein: the heating wire, the thermosensitive bimetallic strip, the first contact and the second contact are all arranged in one shell.
3. The timing switching circuit of a mechanical direct-cooling single system refrigerator as claimed in claim 1, wherein: the thermosensitive bimetallic strip is in a circular arc bending state at normal temperature.
4. The timing switching circuit of the mechanical direct cooling single system refrigerator as claimed in claim 3, wherein: the outer arc surface of the thermosensitive bimetallic strip in the arc bending state faces the second contact.
5. The timing switching circuit of the mechanical direct cooling single system refrigerator as claimed in claim 4, wherein: the first contact is arranged on the outer arc surface of the thermosensitive bimetallic strip.
6. The timing switching circuit of a mechanical direct-cooling single system refrigerator as claimed in claim 1, wherein: the first contact and the second contact are both welded on the timing switch circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111370364.5A CN114188185A (en) | 2021-11-18 | 2021-11-18 | Timing switch circuit of mechanical direct-cooling single-system refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111370364.5A CN114188185A (en) | 2021-11-18 | 2021-11-18 | Timing switch circuit of mechanical direct-cooling single-system refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114188185A true CN114188185A (en) | 2022-03-15 |
Family
ID=80540360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111370364.5A Pending CN114188185A (en) | 2021-11-18 | 2021-11-18 | Timing switch circuit of mechanical direct-cooling single-system refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114188185A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB472087A (en) * | 1935-09-07 | 1937-09-16 | Landis & Gyr Ag | An improved method of and apparatus for regulating the temperature of rooms and other spaces |
| CN2152301Y (en) * | 1993-05-05 | 1994-01-05 | 田惠民 | Heat compensate refrigerator over-current over-temperature rise double protector |
| JPH11303745A (en) * | 1998-04-21 | 1999-11-02 | Matsushita Refrig Co Ltd | Sealed motor-driven compressor |
| CN101459016A (en) * | 2008-12-22 | 2009-06-17 | 苏州华旃航天电器有限公司 | Compressor protector with stable action time |
| CN210040104U (en) * | 2019-05-28 | 2020-02-07 | 加西贝拉压缩机有限公司 | Protector structure with support adjusting rod for refrigeration compressor |
| US20200328053A1 (en) * | 2018-04-08 | 2020-10-15 | Xiamen Set Electronics Co., Ltd | Temperature controller with thermal protection |
| CN212136385U (en) * | 2020-07-04 | 2020-12-11 | 侨日电器(深圳)有限公司 | Low current overload protector |
-
2021
- 2021-11-18 CN CN202111370364.5A patent/CN114188185A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB472087A (en) * | 1935-09-07 | 1937-09-16 | Landis & Gyr Ag | An improved method of and apparatus for regulating the temperature of rooms and other spaces |
| CN2152301Y (en) * | 1993-05-05 | 1994-01-05 | 田惠民 | Heat compensate refrigerator over-current over-temperature rise double protector |
| JPH11303745A (en) * | 1998-04-21 | 1999-11-02 | Matsushita Refrig Co Ltd | Sealed motor-driven compressor |
| CN101459016A (en) * | 2008-12-22 | 2009-06-17 | 苏州华旃航天电器有限公司 | Compressor protector with stable action time |
| US20200328053A1 (en) * | 2018-04-08 | 2020-10-15 | Xiamen Set Electronics Co., Ltd | Temperature controller with thermal protection |
| CN210040104U (en) * | 2019-05-28 | 2020-02-07 | 加西贝拉压缩机有限公司 | Protector structure with support adjusting rod for refrigeration compressor |
| CN212136385U (en) * | 2020-07-04 | 2020-12-11 | 侨日电器(深圳)有限公司 | Low current overload protector |
Non-Patent Citations (1)
| Title |
|---|
| 天津大学精仪系计时教研室: "《机械计时仪器》", 30 November 1980, 天津科学技术出版社, pages: 306 - 307 * |
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