CN113945050A - Defrosting system and control method of refrigerator and refrigerator - Google Patents
Defrosting system and control method of refrigerator and refrigerator Download PDFInfo
- Publication number
- CN113945050A CN113945050A CN202111193754.XA CN202111193754A CN113945050A CN 113945050 A CN113945050 A CN 113945050A CN 202111193754 A CN202111193754 A CN 202111193754A CN 113945050 A CN113945050 A CN 113945050A
- Authority
- CN
- China
- Prior art keywords
- defrosting
- water
- refrigerator
- coil
- storage box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010257 thawing Methods 0.000 title claims abstract description 173
- 238000000034 method Methods 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 165
- 230000008020 evaporation Effects 0.000 claims abstract description 8
- 238000001704 evaporation Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims description 11
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- 230000000630 rising effect Effects 0.000 abstract 1
- 238000004904 shortening Methods 0.000 abstract 1
- 239000003570 air Substances 0.000 description 12
- 238000005336 cracking Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000003340 mental effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
- F25D21/08—Removing frost by electric heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/002—Defroster control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
- F25D21/12—Removing frost by hot-fluid circulating system separate from the refrigerant system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/14—Collecting or removing condensed and defrost water; Drip trays
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Defrosting Systems (AREA)
Abstract
The invention discloses a defrosting system of a refrigerator, a control method and the refrigerator, which comprise an evaporator assembly, an evaporation disc, an exhaust connecting pipe, a defrosting water tray and a defrosting heater arranged at the bottom of the evaporator, wherein the evaporator assembly is provided with a refrigerator coil and a defrosting coil, the defrosting water tray is arranged below the defrosting coil and the refrigerator coil, the defrosting coil penetrates through the refrigerator coil and the defrosting water tray from top to bottom, a defrosting device is arranged above the evaporation disc, and the defrosting device is respectively connected with the defrosting coil and the defrosting water tray. The invention utilizes the heat generated by the refrigerator body to assist defrosting, and has the characteristics of not additionally increasing the heat in the defrosting process, shortening the defrosting time, inhibiting the temperature in the refrigerator from rising in the defrosting process, reducing the energy consumption of the refrigerator and the like.
Description
Technical Field
The invention relates to the technical field of defrosting of refrigerators, in particular to a defrosting system of a refrigerator, a control method and a refrigerator.
Background
Refrigerator defrosting is a problem that must be considered in a refrigerator control system, particularly in an air-cooled refrigerator control system. When the refrigerator is normally cooled, since the evaporator temperature is low and the ambient air temperature is relatively high, water vapor in the air gradually condenses as a frost layer on the surface of the evaporator. If the frost layer is too thick, the refrigeration efficiency is reduced, and the energy consumption is increased.
At present, the frostless refrigerator on the market generally adopts an electric heating mode to defrost. The defrosting mode is that a heater is arranged at the bottom of an evaporator, the heater is electrified and heated, and the heat of a steel pipe heater is transferred to a frost layer in a heat radiation and heat convection mode. For a refrigerator using an auxetic evaporator, an evaporator fin arrangement mode with a dense upper part and a sparse lower part is generally adopted, but for products with a large evaporator chamber width and a small height, frost is not uniform, and particularly, the situation is worse for products with unreasonable air return openings. After the defrosting process of the refrigerator is quitted, the top of the evaporator still has residual frost, so that the defrosting test is unqualified, and long time, the refrigerator with an excessively thick frost layer can not refrigerate, so that the user complaint is caused.
Aiming at the problem of residual frost of the evaporator, the method generally adopts a mode of increasing the power of a heater, prolonging the working time of the heater or increasing the exit temperature of a defrosting sensor. The result of all three modes is that the heat in the defrosting process is increased, the temperature rise in the refrigerator is inevitably increased, and the energy consumption of the refrigerator is increased.
In the comparison document CN105716355A, the water box in the comparison document is too far away from the heat source, the heat required for heating the defrosting water is not supplied enough, and the heat conduction efficiency is low; in addition, the patent does not provide a solution for solving water storage in an auxiliary defrosting water pipe, and when the refrigerator refrigerates again, the risk of pipe cracking or pipe explosion exists, so that the potential safety hazard exists.
Disclosure of Invention
In order to overcome the above disadvantages of the prior art, an object of the present invention is to provide a defrosting system of a refrigerator, a control method and a refrigerator, which solve the problems of residual frost in an evaporator, increased temperature in a refrigerator due to increased heat in a defrosting process and increased energy consumption of the refrigerator in the prior art by increasing heater power, prolonging heater operation time or increasing the exit temperature of a defrosting sensor.
The technical scheme adopted by the invention for solving the technical problems is as follows: the defrosting system of the refrigerator comprises an evaporator assembly, an evaporation disc, an exhaust connecting pipe, a defrosting water pan and a defrosting heater arranged at the bottom of the evaporator, wherein the evaporator assembly is provided with a refrigerator coil and a defrosting coil, the defrosting water pan is arranged below the defrosting coil and the refrigerator coil, the defrosting coil penetrates through the refrigerator coil and the defrosting water pan from top to bottom, a defrosting device is arranged above the evaporation disc, and the defrosting device is respectively connected with the defrosting coil and the defrosting water pan.
As a further improvement of the invention: the defrosting device is provided with a water storage box, the water storage box is provided with a first water outlet, a second water outlet and a water inlet, the first water outlet and the water inlet are all located at the top of the water storage box, the bottom of the water storage box is provided with the second water outlet, the first water outlet is provided with a water pump and an air pump, the water pump and the air pump are connected in parallel with a defrosting coil pipe, the defrosting water pan is connected with the water inlet, and an exhaust connecting pipe is installed in the water storage box.
As a further improvement of the invention: the defrosting coil pipe is in contact connection with the evaporator fin.
As a further improvement of the invention: the water pump and the air pump are connected in parallel and are connected with the defrosting pipe through a three-way reversing valve.
As a further improvement of the invention: a liquid level instrument is arranged in the water storage box and connected with the main control board.
As a further improvement of the invention: and a water valve is arranged at the second water outlet and is connected with the main control board.
A control method of the refrigerator defrosting system comprises the following steps,
s1, defrosting the refrigerator for the first time, wherein the defrosting heater works, and defrosting water of the refrigerator enters the water storage box through the water inlet;
s2: setting a preset water quantity value, and detecting the water quantity value in the water storage box by the liquid level meter; if the water quantity value in the water storage box reaches the preset value, controlling the water valve to open the second water outlet; when the liquid level meter detects that the water quantity value in the water storage box does not reach the preset water quantity value, the water valve is controlled to close the second water outlet;
s3: the refrigerator quits defrosting, the refrigerator refrigerates normally, and the exhaust connecting pipe heats defrosting water in the water storage box;
s4: when the refrigerator meets defrosting conditions, the water pump is started, after all the heated defrosting water in the water storage box is introduced into the defrosting coil pipe, the water pump is closed, and the heated defrosting water flows into the defrosting water receiving disc from the defrosting coil pipe from top to bottom;
s5: the refrigerator stops refrigerating, and the defrosting heater starts to work;
s6: and when the refrigerator reaches a defrosting exit condition, the defrosting heater stops working, the air pump is started, and all water in the defrosting coil pipe is discharged.
A refrigerator comprises a control method using the refrigerator defrosting system.
Compared with the prior art, the invention has the beneficial effects that:
1. the defrosting water in the water storage box is heated through the exhaust connecting pipe without additionally increasing the heat in the defrosting process, the defrosting water is introduced into the defrosting coil pipe and flows into the defrosting water receiving tray from top to bottom, the ice on the upper layer of the evaporator is firstly melted by the heated defrosting water, then the defrosting heater is started to defrost, the defrosting time is shortened, the temperature rise in the refrigerator in the defrosting process is inhibited, and the energy consumption of the refrigerator is reduced.
2. According to the defrosting device, the water pump and the air pump are connected in parallel and are connected with the defrosting coil through the three-way reversing valve, so that residual water in the defrosting coil is discharged after the defrosting heater finishes defrosting, pipe explosion or pipe cracking caused by residual water in the defrosting coil when the refrigerator refrigerates again is avoided, and potential safety hazards are reduced.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the defrosting device.
Fig. 3 is a schematic structural view of an evaporator assembly.
Fig. 4 is a schematic structural view of a refrigerator coil and a defrosting coil.
Detailed Description
The invention will now be further described with reference to the accompanying description and examples:
example 1: as shown in fig. 1 to 4, a defrosting system of a refrigerator includes an evaporator assembly 9, an evaporation pan 7, an exhaust connection pipe 5, a defrosting water pan, and a defrosting heater disposed at the bottom of the evaporator, where the evaporator assembly 9 is provided with a refrigerator coil 91 and a defrosting coil 92, the defrosting water pan is disposed below the defrosting coil 92 and the refrigerator coil 91, the defrosting coil 92 penetrates the refrigerator coil 91 and the defrosting water pan from top to bottom, a defrosting device is disposed above the evaporation pan 7, and the defrosting device is connected to the defrosting coil 92 and the defrosting water pan respectively.
Specifically, the defrosting device is provided with water storage box 4, water storage box 4 is equipped with first delivery port, second delivery port 6 and water inlet 8, first delivery port with water inlet 8 all is located the top of water storage box 4, the bottom of water storage box 4 is equipped with second delivery port 6, first delivery port department is provided with water pump 3 and air pump 1, water pump 3 with air pump 1 parallelly connected with defrosting coil 92 connects, the defrosting water collector with water inlet 8 is connected, install exhaust connecting pipe 5 in the water storage box 4.
The flow of liquid in the defrosting coil 92 is from top to bottom.
Specifically, the defrosting coil 92 is in direct contact with the evaporator fins, so that the heat conduction efficiency is high, and the defrosting efficiency of the refrigerator is higher.
Specifically, the water pump 3 and the air pump 1 are connected in parallel and are connected with the defrosting pipe through a three-way reversing valve 2.
Specifically, be provided with the liquid level appearance in the water storage box 4, the liquid level appearance is connected with the main control board.
Specifically, a water valve is arranged at the second water outlet 6 and connected with the main control board.
Example 2: as shown in fig. 1 to 4, a control method of a defrosting system of a refrigerator according to embodiment 1 includes,
s1, defrosting the refrigerator for the first time, wherein the defrosting heater works, and defrosting water of the refrigerator enters the water storage box through the water inlet; the whole process of the first defrosting of the refrigerator is defrosting by the heat generated by the defrosting heater;
s2: setting a preset water quantity value, and detecting the water quantity value in the water storage box by the liquid level meter; if the water quantity value in the water storage box reaches the preset value, controlling the water valve to open the second water outlet; when the liquid level meter detects that the water quantity value in the water storage box does not reach the preset water quantity value, the water valve is controlled to close the second water outlet;
s3: the refrigerator quits defrosting, the refrigerator refrigerates normally, and the exhaust connecting pipe heats defrosting water in the water storage box;
the defrosting water in the water storage box is heated by utilizing the heat emitted by the exhaust connecting pipe during the refrigeration of the refrigerator, so that the heat in the defrosting process is not additionally increased;
s4: when the refrigerator meets defrosting conditions, the water pump is started, after all the heated defrosting water in the water storage box is introduced into the defrosting coil pipe, the water pump is closed, and the heated defrosting water flows into the defrosting water receiving disc from the defrosting coil pipe from top to bottom;
s5: the refrigerator stops refrigerating, and the defrosting heater starts to work;
the hot water in the defrosting coil firstly melts the ice on the upper layer of the evaporator, the defrosting heater is assisted to defrost, the starting time of the defrosting heater only needs to melt the residual ice on the rest part of the evaporator, the defrosting time is shortened, the heat in the defrosting process is not additionally increased, the temperature in the refrigerator is increased in the defrosting process all the time, and the energy consumption of the refrigerator is reduced;
s6: when the refrigerator reaches a defrosting exit condition, the defrosting heater stops working, the air pump is started, and all water in the defrosting coil pipe is discharged; the pipe explosion or pipe crack caused by residual moisture in the water pipe when the refrigerator refrigerates again is avoided, and the potential safety hazard is reduced.
Example 3: as shown in fig. 1 to 4, a refrigerator using the control method of a refrigerator defrosting system of embodiment 2.
The main functions of the invention are as follows: the invention utilizes the heat generated by the refrigerator body to assist defrosting, does not additionally increase the heat in the defrosting process, shortens the defrosting time, inhibits the temperature rise in the refrigerator in the defrosting process, reduces the energy consumption of the refrigerator, and is additionally provided with the air pump to exhaust the residual water in the defrosting coil pipe, thereby preventing the pipe from cracking or bursting and reducing the potential safety hazard.
In summary, after reading the present disclosure, those skilled in the art can make various other corresponding changes without creative mental labor according to the technical solutions and concepts of the present disclosure, and all of them are within the protection scope of the present disclosure.
Claims (8)
1. The refrigerator defrosting system is characterized by comprising an evaporator assembly, an evaporation disc, an exhaust connecting pipe, a defrosting water tray and a defrosting heater arranged at the bottom of the evaporator, wherein the evaporator assembly is provided with a refrigerator coil and a defrosting coil, the defrosting water tray is arranged below the defrosting coil and the refrigerator coil, the defrosting coil penetrates through the refrigerator coil and the defrosting water tray from top to bottom, a defrosting device is arranged above the evaporation disc, and the defrosting device is respectively connected with the defrosting coil and the defrosting water tray.
2. The refrigerator defrosting system according to claim 1, wherein the defrosting device is provided with a water storage box, the water storage box is provided with a first water outlet, a second water outlet and a water inlet, the first water outlet and the water inlet are both located at the top of the water storage box, the bottom of the water storage box is provided with a second water outlet, the first water outlet is provided with a water pump and an air pump, the water pump and the air pump are connected in parallel and connected with the defrosting coil pipe, the defrosting water receiving tray is connected with the water inlet, and the water storage box is provided with an exhaust connecting pipe.
3. The refrigerator defrosting system of claim 1 wherein the defrosting coil is in contact connection with the evaporator fins.
4. The refrigerator defrosting system of claim 2 wherein the water pump and the air pump are connected in parallel through a three-way reversing valve to the defrosting pipe.
5. The defrosting system of a refrigerator according to claim 2 wherein a liquid level gauge is arranged in the water storage box and connected with the main control panel.
6. The defrosting system of a refrigerator as claimed in claim 2, wherein a water valve is provided at the second water outlet, and the water valve is connected with the main control panel.
7. A control method of the refrigerator defrosting system according to any one of claims 1 to 6, comprising:
s1, defrosting the refrigerator for the first time, wherein the defrosting heater works, and defrosting water of the refrigerator enters the water storage box through the water inlet;
s2: setting a preset water quantity value, and detecting the water quantity value in the water storage box by the liquid level meter; if the water quantity value in the water storage box reaches the preset value, controlling the water valve to open the second water outlet; when the liquid level meter detects that the water quantity value in the water storage box does not reach the preset water quantity value, the water valve is controlled to close the second water outlet;
s3: the refrigerator quits defrosting, the refrigerator refrigerates normally, and the exhaust connecting pipe heats defrosting water in the water storage box;
s4: when the refrigerator meets defrosting conditions, the water pump is started, after all the heated defrosting water in the water storage box is introduced into the defrosting coil pipe, the water pump is closed, and the heated defrosting water flows into the defrosting water receiving disc from the defrosting coil pipe from top to bottom;
s5: the refrigerator stops refrigerating, and the defrosting heater starts to work;
s6: and when the refrigerator reaches a defrosting exit condition, the defrosting heater stops working, the air pump is started, and all water in the defrosting coil pipe is discharged.
8. A refrigerator characterized by using the control method of a refrigerator defrosting system of claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111193754.XA CN113945050A (en) | 2021-10-13 | 2021-10-13 | Defrosting system and control method of refrigerator and refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111193754.XA CN113945050A (en) | 2021-10-13 | 2021-10-13 | Defrosting system and control method of refrigerator and refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113945050A true CN113945050A (en) | 2022-01-18 |
Family
ID=79329577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111193754.XA Pending CN113945050A (en) | 2021-10-13 | 2021-10-13 | Defrosting system and control method of refrigerator and refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113945050A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115289771A (en) * | 2022-07-28 | 2022-11-04 | 长虹美菱股份有限公司 | Water pan auxiliary heating control method for refrigerator and refrigerator |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100958538B1 (en) * | 2009-08-31 | 2010-05-18 | (주)쿨테이너 | Drain water heating device by utilizing waste heat of defrost processing |
| CN105716355A (en) * | 2016-02-03 | 2016-06-29 | 西安交通大学 | Auxiliary defrosting device and method for air cooling refrigerator |
| CN105890269A (en) * | 2016-04-15 | 2016-08-24 | 合肥华凌股份有限公司 | Circulating defrosting system, refrigerator and defrosting method |
| CN205747589U (en) * | 2016-05-16 | 2016-11-30 | 叶立英 | A kind of heat-exchange system and there is the heat pump of defrosting function |
| CN211452038U (en) * | 2020-01-03 | 2020-09-08 | 中国建筑科学研究院有限公司 | Anti-freezing surface air cooler |
| CN112728764A (en) * | 2021-01-14 | 2021-04-30 | 格力电器（武汉）有限公司 | Heat exchanger, outdoor unit, air energy water heater and defrosting method |
-
2021
- 2021-10-13 CN CN202111193754.XA patent/CN113945050A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100958538B1 (en) * | 2009-08-31 | 2010-05-18 | (주)쿨테이너 | Drain water heating device by utilizing waste heat of defrost processing |
| CN105716355A (en) * | 2016-02-03 | 2016-06-29 | 西安交通大学 | Auxiliary defrosting device and method for air cooling refrigerator |
| CN105890269A (en) * | 2016-04-15 | 2016-08-24 | 合肥华凌股份有限公司 | Circulating defrosting system, refrigerator and defrosting method |
| CN205747589U (en) * | 2016-05-16 | 2016-11-30 | 叶立英 | A kind of heat-exchange system and there is the heat pump of defrosting function |
| CN211452038U (en) * | 2020-01-03 | 2020-09-08 | 中国建筑科学研究院有限公司 | Anti-freezing surface air cooler |
| CN112728764A (en) * | 2021-01-14 | 2021-04-30 | 格力电器（武汉）有限公司 | Heat exchanger, outdoor unit, air energy water heater and defrosting method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115289771A (en) * | 2022-07-28 | 2022-11-04 | 长虹美菱股份有限公司 | Water pan auxiliary heating control method for refrigerator and refrigerator |
| CN115289771B (en) * | 2022-07-28 | 2024-05-31 | 长虹美菱股份有限公司 | Water pan auxiliary heating control method for refrigerator and refrigerator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3290837A1 (en) | Freezing and cold storage device and defrosting control method therefor | |
| US6684659B1 (en) | Refrigerator and defrosting heater | |
| US20170241696A1 (en) | Freezing and Refrigerating Device and Defrosting Control Method thereof | |
| CN106247742B (en) | A kind of refrigerator freezing fan defrosting device and its control method | |
| CN206113475U (en) | Icy case of defrost system soft breeze of forced air cooling refrigerator | |
| US2713249A (en) | Liquid defrosting system and the like | |
| US5761922A (en) | Low temperature display case | |
| CN103727714B (en) | A kind of defrost system of Teat pump boiler and control method thereof | |
| CN105674670B (en) | Refrigerator | |
| CN105020965B (en) | Refrigerator | |
| CN113945050A (en) | Defrosting system and control method of refrigerator and refrigerator | |
| JP2010133590A (en) | Refrigerator-freezer | |
| US2909907A (en) | Refrigerating apparatus with hot gas defrost means | |
| US5709096A (en) | Defrosting device for a low temperature display case | |
| CN103453718A (en) | Refrigerator | |
| US20210278112A1 (en) | Evaporator and refrigerator having same | |
| US1890085A (en) | Defrosting device for refrigerating cases | |
| CN107076495B (en) | Frost-free refrigeration appliance | |
| JP5031045B2 (en) | Freezer refrigerator | |
| US4959971A (en) | Refrigerant piping system for refrigeration equipment | |
| US2252979A (en) | Refrigeration apparatus | |
| CN104364596B (en) | Vaporizer for refrigerating appliance and refrigerating appliance | |
| JP6783095B2 (en) | Frozen / refrigerated showcase | |
| JP2016223669A (en) | Control device and heat pump type water heater | |
| CN209013536U (en) | A kind of quickly defrosting system of automatic vending machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220118 |
|
| RJ01 | Rejection of invention patent application after publication |