CN109381148B - Heat pump type dishwasher and control method - Google Patents
Heat pump type dishwasher and control method Download PDFInfo
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- CN109381148B CN109381148B CN201710684948.7A CN201710684948A CN109381148B CN 109381148 B CN109381148 B CN 109381148B CN 201710684948 A CN201710684948 A CN 201710684948A CN 109381148 B CN109381148 B CN 109381148B
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000004146 energy storage Methods 0.000 claims abstract description 179
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 151
- 238000005406 washing Methods 0.000 claims abstract description 100
- 238000010438 heat treatment Methods 0.000 claims abstract description 76
- 239000007788 liquid Substances 0.000 claims description 29
- 238000004851 dishwashing Methods 0.000 claims description 20
- 239000002918 waste heat Substances 0.000 abstract description 6
- 238000005485 electric heating Methods 0.000 description 14
- 230000008014 freezing Effects 0.000 description 9
- 238000007710 freezing Methods 0.000 description 9
- 238000001514 detection method Methods 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 230000008929 regeneration Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical group O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
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- 230000009467 reduction Effects 0.000 description 1
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Images
Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/4285—Water-heater arrangements
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
- A47L15/0021—Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery
- A47L15/0028—Washing phases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Landscapes
- Heat-Pump Type And Storage Water Heaters (AREA)
- Washing And Drying Of Tableware (AREA)
Abstract
本发明公开了一种热泵式洗碗机及控制方法，包括处理室和用于加热洗涤水的热泵系统，所述处理室内设置排水口，所述洗碗机在所述处理室内洗涤餐具；所述热泵系统包括蒸发器，所述储能装置内盛有储能介质，所述蒸发器与储能介质接触吸收所述储能介质的热量；所述洗碗机还设置有进行热传递的换热单元；所述换热单元与处理室连通，所述处理室中的洗涤水可导入到换热单元内与储能装置进行热交换；或者所述换热单元与储能装置连通，所述储能介质可导入到换热单元内与所述处理室进行热交换。发明采用吸收储能装置中的热量的热泵加热系统，取消了风机，噪音更低；通过不同的结构将热量从处理室传导到储能装置，充分利用了余热，提高了热能的利用率。
The invention discloses a heat pump type dishwasher and a control method, comprising a processing chamber and a heat pump system for heating washing water, wherein a drainage port is arranged in the processing chamber, and the dishwasher washes tableware in the processing chamber; The heat pump system includes an evaporator, the energy storage device contains an energy storage medium, and the evaporator contacts the energy storage medium to absorb the heat of the energy storage medium; the dishwasher is also provided with a heat exchanger for heat transfer. a heat unit; the heat exchange unit communicates with the treatment chamber, and the washing water in the treatment chamber can be introduced into the heat exchange unit for heat exchange with the energy storage device; or the heat exchange unit communicates with the energy storage device, the The energy storage medium can be introduced into the heat exchange unit for heat exchange with the processing chamber. The invention adopts a heat pump heating system that absorbs the heat in the energy storage device, eliminates the fan, and has lower noise; the heat is conducted from the processing chamber to the energy storage device through different structures, making full use of the waste heat and improving the utilization rate of heat energy.
Description
Technical Field
The invention belongs to the field of kitchen equipment, and particularly relates to a heat pump type dish washing machine and a control method.
Background
The dish washer is used for automatically cleaning tableware such as dish, chopsticks, dish, knife and fork, and can be divided into two types of box type and conveying type according to the structure. It reduces the labor intensity for the cooking personnel in dining room, hotel and dining room of office, improves the working efficiency and promotes the cleanness and sanitation. At present, various small dishwashers are on the market, and are gradually entering ordinary households.
The existing dish washer uses a heating pipe to supply water to the dish washer, the heating pipe is arranged in a water tank at the bottom of an inner container, and when in washing, the heating pipe is used for heating, and circulating water of a circulating pump is used for washing dishes. However, this method consumes much power and does not dry thoroughly.
In order to solve the problems, some dish washing machines adopting other heating modes exist at present, for example, the Chinese utility model patent with the application number of 201420465616.1 and the name of heat pump type dish washing machine provides a heat pump type dish washing machine, which comprises an inner container, a compressor, a condenser, a throttling device and an evaporator, wherein the condenser is arranged close to the outer wall of the inner container; the outlet of the compressor is connected with the inlet of the condenser, the outlet of the condenser is connected with the inlet of the evaporator through the throttling device, and the outlet of the evaporator is connected with the inlet of the compressor. The utility model discloses an energy resource consumption when saving the washing, the heat pump system that mainly comprises compressor, condenser, throttling arrangement and evaporimeter imbeds in the dish washer adopts copper pipe or aluminum pipe as heat pump system's condenser, closely pastes or twines the setting at the inner bag outer wall. The utility model discloses a having changed the mode that current dish washer adopted the heating pipe heating, having used heat pump system to the dish washer field, opened a brand-new heating and drying mode, very big reduction the consumption of the energy, and have better user experience.
However, the above patents have the following disadvantages: although the problem that heating pipes are large in heating power consumption is solved to a certain extent in the dish-washing machine disclosed by the patent, the heat pump system can affect the temperature of the surrounding environment during working, particularly, the heat pump system is often provided with a fan for better absorbing heat of an evaporator, and therefore the noise is extremely high in the heat pump operation. And when the external environment temperature is too low, the working efficiency of the heat pump is greatly reduced, so that the heating speed is influenced.
Dishwashers typically perform a hot water wash cycle, a cold water rinse cycle, and a final hot water rinse cycle. In the prior dish washer, after the first hot water washing, the heat in the treatment chamber is lost, and the heat is required to be absorbed from the outside again when the last hot water rinsing is carried out so as to heat the washing water, so that the utilization rate of the heat energy is not high.
The present invention has been made in view of this situation.
Disclosure of Invention
The invention provides a heat pump type dish washing machine and a control method, aiming at overcoming the defects of the prior art, the invention adopts a heat pump heating system for absorbing heat in an energy storage device, cancels a fan and has lower noise; the heat is conducted from the treatment chamber to the energy storage device through different structures, the waste heat in the treatment chamber of the dishwasher after being washed by hot water is fully utilized, and the heat energy utilization efficiency of the heat pump heating system is improved.
In order to realize the purpose, the invention adopts the following technical scheme:
a heat pump dishwasher comprising a treatment chamber in which a drain opening is provided, and a heat pump system for heating washing water, the dishwasher washing dishes in the treatment chamber; the heat pump system comprises an evaporator, an energy storage medium is contained in an energy storage device, and the evaporator is in contact with the energy storage medium to absorb heat of the energy storage medium; the dishwasher is also provided with a heat exchange unit for heat transfer;
the heat exchange unit is communicated with the treatment chamber, and the washing water in the treatment chamber can be guided into the heat exchange unit to exchange heat with the energy storage device; the heat exchange unit is provided with a water inlet which is communicated with a water drainage pipeline through a first pipeline, the heat exchange unit is provided with a water outlet which is communicated with the treatment chamber through a second pipeline;
or the heat exchange unit is communicated with an energy storage device, and the energy storage medium can be led into the heat exchange unit to exchange heat with the treatment chamber; the heat exchange unit is communicated with an energy storage device, the energy storage device is provided with a liquid inlet and a liquid outlet which are communicated with the heat exchange unit, the heat exchange unit guides the energy storage medium into the heat exchange unit through the liquid outlet, and the energy storage medium flows back into the energy storage device through the liquid inlet.
Furthermore, a heat exchange unit control valve used for controlling the on-off of the pipeline is arranged on the first pipeline.
Further, the heat exchange unit is arranged in the energy storage device and exchanges heat with the energy storage medium.
Furthermore, a drain valve for controlling the on-off of the drain pipeline is arranged on the drain pipeline, is positioned in the water flow direction of the washing water and is positioned at the downstream of the heat exchange unit control valve.
Further, the drainage pipeline is provided with a drainage pump, the drainage pump is positioned between the treatment chamber and a port of a first pipeline, and the port of the first pipeline is a port of the first pipeline and the drainage pipeline.
Furthermore, the heat exchange unit and the energy storage device are communicated through an energy storage medium pipeline which is connected with the liquid inlet and the heat exchange unit and/or the liquid outlet and the heat exchange unit.
A control method of the heat pump dishwasher, wherein the method leads the washing water in the processing chamber into the heat exchange unit to exchange heat with the energy storage device by controlling the heat exchange unit to be communicated with the processing chamber; or controlling the heat exchange unit to be communicated with the energy storage device, leading the energy storage medium into the heat exchange unit to exchange heat with the processing chamber, leading heat in the processing chamber into the energy storage medium, and enabling the evaporator to be in contact with the energy storage medium to absorb the heat of the energy storage device.
Furthermore, the heat exchange unit is communicated with the treatment chamber under control, the heat exchange unit exchanges heat with the energy storage device, washing water in the treatment chamber is introduced into the heat exchange unit by controlling the on-off of the heat exchange unit, the treatment chamber and the drainage pipeline, and heat in the treatment chamber is transferred to the energy storage device.
Further, the heat exchange unit is controlled to be communicated with an energy storage device, the heat exchange unit exchanges heat with the processing chamber, and heat in the processing chamber is transferred to the energy storage device by driving the energy storage medium in the energy storage device to flow in the heat exchange unit.
Furthermore, the dish washing machine controlled by the method performs at least one hot water washing process, and after the dish washing machine performs the hot water washing process, the heat exchange unit is controlled to transfer the heat in the treatment chamber to the energy storage device.
After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.
According to the heat pump type dish washing machine and the control method, the heat pump heating system is adopted, and the energy consumption for heating washing water is reduced because the energy efficiency ratio of the heat pump system is high; and the heat pump is adopted to absorb heat in the energy storage device, compared with the common heat pump which absorbs heat in the air, the use of a fan is cancelled, and the noise is lower when the heat pump operates. Meanwhile, aiming at the condition that the heating efficiency of the heat pump is reduced when the external environment temperature is too low, the invention also realizes rapid heating in a direct electric heating mode, so that the dish-washing machine can efficiently heat washing water under different environment conditions.
In the invention, the evaporator is fully contacted with the energy storage medium in the energy storage device to realize the heat absorption of the evaporator. Because the energy storage device adopts the liquid energy storage medium, the heat exchange device can exchange heat with the evaporator more uniformly, and the heat exchange efficiency is higher.
Dishwashers typically perform a hot water wash cycle, a cold water rinse cycle, and a final hot water rinse cycle. According to the invention, the heat exchange unit is communicated with the treatment chamber, and the washing water in the treatment chamber can be guided into the heat exchange unit to exchange heat with the energy storage device; or the heat exchange unit is communicated with the energy storage device, the energy storage medium can be guided into the heat exchange unit to exchange heat with the processing chamber, and the different structural designs are adopted, so that heat is transferred from the processing chamber to the energy storage device, the waste heat is fully utilized, and the utilization rate of heat energy is improved.
The invention adopts the heat exchanger to circulate the energy storage medium to the treatment chamber for heating regeneration, or to circulate the washing hot water to the energy storage device for heating regeneration. The temperature of the energy storage medium can be increased, the heat energy of the treatment chamber after hot water washing is fully utilized, the heat pump system of the dishwasher can heat the washing water for the second time by absorbing the heat stored by the energy storage device, and the working efficiency of the heat pump system is improved.
Meanwhile, the invention also adopts a mode of combining a direct electric heating mode and a heat pump heating mode to realize the heating of the washing water of the dish-washing machine. The heating efficiency is greatly influenced by the external environment when the heat pump heating system is used for heating washing, and meanwhile, a richer heating control means is provided for users. The system selects different heating modes according to different external environmental conditions, realizes the high speed and high efficiency of heating the washing water of the dish-washing machine, reduces the waiting time for a user to use hot water, has good energy-saving effect and improves the user experience.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic diagram of a water circuit and structure of a heat pump dishwasher according to the present invention, the water circuit communicating with a treatment chamber via a heat exchange unit;
FIG. 2 is a schematic diagram of a water path and a structure of a heat pump dishwasher according to the present invention, the water path communicating a heat exchange unit with an energy storage device.
In the figure: 1. a water inlet valve; 2. a respirator; 3. draining pump; 4. a circulation pump; 5. a throttling element; 6. an evaporator; 7. an energy storage device; 8. a compressor; 9. a condenser; 10. an electric heater; 11. a spray port; 12. a water inlet waterway; 13. an energy storage medium; 14. a heat exchange unit; 15. a processing chamber; 16. a drain line; 17. a first pipeline; 18. a heat exchange unit control valve; 19. a water inlet; 20. a water outlet; 21. a second pipeline; 22. a drain valve; 23. a liquid inlet; 24. a liquid outlet; 25. and an energy storage medium circulating pump.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 2, the present invention discloses a heat pump type dishwasher and a control method thereof, including a treatment chamber 15 and a heat pump system for heating washing water, a drain port is provided in the treatment chamber 15, the dishwasher washes dishes in the treatment chamber 15; the heat pump system comprises an evaporator 6, an energy storage medium 13 is contained in the energy storage device 7, and the evaporator 6 is in contact with the energy storage medium 13 to absorb heat of the energy storage medium 13; the dishwasher is further provided with a heat exchange unit 14 for heat transfer; the heat exchange unit 14 is communicated with the treatment chamber 15, and the washing water in the treatment chamber 15 can be guided into the heat exchange unit 14 to exchange heat with the energy storage device 7; or the heat exchange unit 14 is communicated with the energy storage device 7, and the energy storage medium 13 can be introduced into the heat exchange unit 14 to exchange heat with the processing chamber 15. The invention adopts the heat pump heating system for absorbing the heat in the energy storage device, a fan is omitted, and the noise is lower; the heat is conducted to the energy storage device from the treatment chamber through different structures, the waste heat is fully utilized, and the utilization rate of the heat energy is improved.
Example 1
As shown in FIG. 1, the present embodiment discloses a heat pump dishwasher, including a process chamber; be provided with in the treatment chamber and spray mouth 11, the washing water that sprays that spray mouth 11 provided through water inlet path 12 sprays the washing and is located tableware in the treatment chamber. The water inlet waterway 12 is connected with a water inlet valve 1, a respirator 2, a drainage pump 3, a circulating pump 4 and a spraying port 11. Washing water enters the water inlet waterway 12 through the water inlet valve 1 and flows into the treatment chamber with the tableware, the washing water circularly flows in the water inlet waterway 12 through the circulating pump 4 and is sprayed on the tableware through the spraying port 11 to clean the tableware, dirty water is discharged through the drainage pump 3 after the washing is finished, and the respirator 2 is used for preventing siphoning of the water inlet waterway 12.
The invention heats the washing water through the heating system in order to improve the cleaning effect of the dish-washing machine. The heating system comprises a heat pump system. As shown in fig. 1, the heat pump system comprises a heat pump working medium circuit connected with each other: throttling element 5, evaporator 6, compressor 8, condenser 9. The working principle of the heat pump system is that energy transfer is realized through conversion of a gas-liquid state of a working medium of the heat pump, specifically, high-pressure refrigerant steam discharged from a compressor 8 flows into a condenser 9, the refrigerant steam is condensed to release latent heat, the condensed liquid refrigerant flows through a throttling element 5 to enter an evaporator 6, the evaporator 6 absorbs external heat to evaporate, and the evaporated steam is sucked by the compressor to complete a heating cycle.
The present invention heats the washing water by using the latent heat released from the condenser 9. The condenser 9 of the present invention is a double pipe heat exchanger, which comprises an inner pipe and an outer pipe, wherein the inner pipe is communicated with a water inlet waterway 12, and the outer pipe is communicated with a working medium of a heat pump. When the washing water flows through the inner tube of the double pipe heat exchanger, the heat pump working medium in the pipe of the condenser 9 releases latent heat, heating the washing water in the inner tube. The circulating pump 4 on the water inlet waterway 12 drives the washing water to flow in the water inlet waterway 12, thereby realizing the heating of the washing water in the dishwasher.
In order to reduce noise generated during operation of the heat pump and improve the heat exchange speed of the heat pump, the heat pump system further comprises an energy storage device 7, an energy storage medium 13 is contained in the energy storage device 7, and the evaporator 6 is in contact with the energy storage medium 13 to absorb heat of the energy storage medium 13. In the invention, the evaporator 6 directly absorbs the heat of the energy storage medium 13, and the energy storage medium 13 exchanges heat with the external environment to absorb the heat of the external environment.
As shown in fig. 1, the energy storage device 7 of the present invention has a chamber therein, the energy storage medium 13 is disposed in the chamber, and the evaporator 6 is disposed in the chamber and is in contact with the energy storage medium 13 for heat exchange. In order to improve the heat exchange efficiency of the evaporator 6, the energy storage medium 13 is liquid, and the freezing point of the energy storage medium is lower than that of the washing water, so that the evaporator can still absorb heat from the liquid energy storage medium 13 under the condition of low temperature, and the heat pump can normally operate. It is further preferable that the energy storage medium 13 in this embodiment is brine, because the freezing point of brine is much lower than that of water, and the materials are easily available, which does not cause environmental pollution.
The heat pump system of the present invention further includes a heating device, which is located on the water inlet path 12 and assists or is independent of the heat pump system to heat the washing water.
In this embodiment, the heating device is an electric heater 10 composed of an electric heating tube. The electric heater 10 is positioned on a water inlet waterway between the water outlet of the circulating pump 4 and the spraying port 11. The electric heater 10 may cooperate with a heat pump system to heat the wash water in the inlet water circuit 12.
The electric heater 10 can also be used for heating the washing water independently, and particularly when the external environment temperature is lower than the freezing point of the energy storage medium 13 and the energy storage medium 13 is frozen to cause the heat pump system to be incapable of working normally, the electric heater 10 is started to heat the washing water in the water inlet water path 12, so that the purpose of heating the washing water is achieved.
The position of the electric heater 10 in this embodiment may be located outside the water inlet path, and the washing water is indirectly heated by heating the water inlet path, or the washing water is heated by directly heating the washing water.
In other embodiments, the electric heater 10 may also be a heating device using other means, such as gas heating, and the disposition and control method thereof are the same as those of the present embodiment, and will not be described herein again.
As shown in fig. 1, a heat pump dishwasher of the present invention is further provided with a heat exchanging unit 14 for heat transfer.
In this embodiment, as shown in fig. 1, the heat exchanging unit 14 is communicated with the processing chamber 15, the washing water in the processing chamber 15 is introduced into the heat exchanging unit 14 to exchange heat with the energy storage device 7, and the heat in the processing chamber 15 is transferred to the energy storage device 7 through the washing water.
As shown in fig. 1, the heat exchanging unit 14 is disposed in the energy storage device 7 and exchanges heat with the energy storage medium 13, in this embodiment, a liquid energy storage medium is used, and the heat exchanging unit 14 is immersed in the energy storage medium 13 and exchanges heat with the energy storage medium 13 by contacting with each other.
A water inlet 19 is formed in the heat exchange unit 14, the water inlet 19 is communicated with the drainage pipeline 16 through a first pipeline 17, and a heat exchange unit control valve 18 for controlling the on-off of the pipeline is arranged on the first pipeline 17; the heat exchange unit 14 is communicated with the processing chamber 15; meanwhile, the other end of the heat exchange unit 14 is provided with a water outlet 20, and the water outlet 20 is communicated with the treatment chamber 15 through a second pipeline 21 to guide the washing water in the heat exchange unit 14 into the treatment chamber 15.
The heat exchange unit 14 in this embodiment is a U-shaped heat exchange tube, one side of the heat exchange tube is a water inlet 19 of the heat exchange unit 14, and the other side of the heat exchange tube is a water outlet 20, and the whole U-shaped tube is immersed in the energy storage medium 13 of the energy storage device 7. In order to control the driving of the flow of the washing water in the heat exchange unit 14, a drain valve 22 for controlling the opening and closing of the drain line 16 is provided on the drain line 16, and the drain valve 22 is provided on the drain line 16 downstream of the heat exchange unit control valve 18 in the flow direction of the washing water. Meanwhile, the drain line 16 is provided with a drain pump 22, and the drain pump 22 is located between the treatment chamber 15 and the interface of the first line, which is the interface of the first line 17 and the drain line 16.
As shown in fig. 1, when the drain valve 22 is closed, the heat exchange unit control valve 18 is opened, and the drain pump 22 is operated, the washing water in the processing chamber enters the heat exchange unit 14 through the first pipeline 17, and then returns to the processing chamber 15 through the second pipeline 21, so as to bring the heat in the processing chamber 15 into the energy storage device 7.
After the heat exchange is completed, the washing water is discharged through the drain line 16 by closing the heat exchange unit control valve 18 and opening the drain valve 22. In the embodiment, the purpose of transferring the waste heat of the treatment chamber 15 to the energy storage device 7 is realized by the way that the heat of the washing water in the treatment chamber 15 passes through the pipeline and the washing water is introduced into the heat exchange unit 14 in the energy storage device 7 and the heat exchange between the energy storage medium 13 and the heat exchange unit 14.
Example 2
This embodiment is another structure of the heat pump dishwasher of embodiment 1.
As shown in fig. 2, the heat pump dishwasher of this embodiment is different from embodiment 1 in that the heat exchange unit 14 of this embodiment is communicated with the energy storage device 7, and the energy storage medium 13 is introduced into the heat exchange unit 14 to exchange heat with the processing chamber 15.
In this example, the medium for heat transfer is not the washing water in example 1, but is replaced by an energy storage medium. Specifically, as shown in fig. 2, in this embodiment, the heat exchange unit 14 is communicated with the energy storage device 7, the energy storage device 7 has a liquid inlet 23 and a liquid outlet 24, which are communicated with the heat exchange unit 14, the heat exchange unit 14 guides the energy storage medium 13 into the heat exchange unit 14 through the liquid outlet 23, and returns the energy storage medium 13 to the energy storage device 7 through the liquid inlet 23. In this embodiment, the heat exchange unit and the energy storage device are communicated through an energy storage medium pipeline connecting the liquid inlet and the heat exchange unit and/or the liquid outlet and the heat exchange unit; and an energy storage medium circulating pump 25 is arranged on the energy storage medium pipeline and used for pushing the energy storage medium to flow in the heat exchange unit. The heat exchange unit 14 of the present embodiment is located in the processing chamber 15, and can sufficiently absorb the residual heat after the hot water washing in the processing chamber 15. After entering the heat exchange unit 14 through the energy storage medium, the heat in the processing chamber 15 is carried to the energy storage device 7 through sufficient heat exchange between the heat exchange unit 14 and the surrounding hot air in the processing chamber 15. When the next heat pump heats the system, the evaporator 6 absorbs the heat of the energy storage medium 13 again, and the heat pump heating process is completed.
In other embodiments, the liquid inlet and the liquid outlet may not be connected by a pipeline, but the energy storage device and the heat exchange device are arranged closely, and the energy storage medium is controlled to flow between the heat exchange unit and the energy storage device by on-off of a valve and a circulating pump.
Example 3
The present embodiment is an explanation of a method of controlling the heat pump dishwasher of the above embodiment. The dish washing machine controlled by the method performs at least one hot water washing process, and after the dish washing machine performs the hot water washing process, the heat exchange unit is controlled to transfer the heat in the treatment chamber to the energy storage device
In this embodiment, the dishwasher performs a hot water washing process, a cold water rinsing process, and a final hot water rinsing process. Through the first washing operation, the water temperature in the energy storage device is reduced, and in order to improve the heat pump efficiency during the last hot water rinsing, before the second cold water rinsing, the heat exchange unit is adopted to circulate the energy storage medium into the treatment chamber for heating and regeneration, or the washing hot water is circulated to the energy storage device for heating and regeneration of the energy storage medium.
By adopting the method, the temperature of the energy storage medium can be increased, the stored heat energy can be regenerated, and the efficiency of the heat pump system can be improved when the evaporator absorbs the heat of the energy storage medium for the second time to heat water
Specifically, the method of this embodiment enables the heat exchange unit to communicate with the treatment chamber by control, introduces the washing water in the treatment chamber into the heat exchange unit to exchange heat with the energy storage device, introduces the heat in the treatment chamber into the energy storage medium, and the evaporator contacts with the energy storage medium to absorb the heat of the energy storage device.
In this embodiment, the heat exchange unit is communicated with the treatment chamber under control, the heat exchange unit exchanges heat with the energy storage device, and washing water in the treatment chamber is introduced into the heat exchange unit by controlling the on-off of the heat exchange unit, the treatment chamber and the drainage pipeline, so that heat in the treatment chamber is transferred to the energy storage device.
Example 4
The present embodiment is different from embodiment 3 in that the method for controlling a heat pump dishwasher of the present embodiment controls the heat exchange unit to communicate with the energy storage device, and introduces the energy storage medium into the heat exchange unit to exchange heat with the processing chamber.
In this embodiment, the heat exchange unit is controlled to be communicated with the energy storage device, the heat exchange unit exchanges heat with the processing chamber, and heat in the processing chamber is transferred to the energy storage device by driving the energy storage medium in the energy storage device to flow in the heat exchange unit. The evaporator is in contact with an energy storage medium to absorb heat of the energy storage device. And the flowing energy storage medium is utilized to realize the collection and utilization of the waste heat in the treatment chamber.
Example 5
The present embodiment is a supplement to the control method of the above embodiment, and in the present embodiment, the heat pump type dishwasher starts heating washing, and automatically selects to use the heat pump system and/or the electric heater to heat the washing water path.
In order to realize the technical scheme of the automatic selection heating system of the heat pump type dishwasher with automatic control, the heat pump type dishwasher comprises a temperature detection device for detecting the ambient temperature. And the heat pump type dish washing machine automatically selects and uses the heat pump system and/or the electric heater to heat the washing water channel according to the comparison result of the ambient temperature detected by the temperature detection device and the temperature of the energy storage medium in the energy storage device.
Specifically, it can be seen from the above examples that the freezing point temperature of the energy storage medium in the present invention is lower than the freezing point temperature of the washing water. When the ambient temperature is higher than the freezing point temperature of the washing water, the energy storage medium and the washing water are both in liquid state, the heat pump can work normally, the evaporator absorbs heat from the energy storage medium in the energy storage device, and the condenser heats the washing water. The heat pump heating mode has high heat exchange efficiency and is a heating scheme which is preferentially used, so that the control device of the dishwasher automatically adopts the heat pump system to heat the washing water at the moment.
Of course, in order to accelerate the temperature rise of the washing water, the electric heater can be simultaneously turned on at the same time, so that the heat pump system and the electric heater simultaneously heat the washing water channel, and the temperature of the washing water is rapidly raised.
In this embodiment, when the ambient temperature is higher than the freezing point temperature of the energy storage medium and lower than the freezing point temperature of the washing water, the ambient temperature is already low, and the heat pump can work at this time, but the work efficiency is significantly reduced, and the washing water is likely to be solidified at any time, so the washing water is scrambled by controlling the method of heating the washing water waterway by using the heat pump system and the electric heater at the same time, or the washing water waterway is heated by simply using the electric heater.
Further, when the ambient temperature further drops and is lower than the freezing point temperature of the energy storage medium, the heat pump system cannot normally work due to the fact that the energy storage medium and the washing water are solidified, and the dishwasher adopts a method for controlling the washing water waterway to be heated by only using the electric heater to meet the requirement of heating the washing water of the dishwasher.
The dishwasher in the embodiment automatically selects different washing water heating modes according to the change of the ambient temperature, so as to improve the heating efficiency of the dishwasher.
Example 6
The present embodiment is different from embodiment 5 in that the different heating modes in the present embodiment are realized according to control instructions. In this embodiment, the heating control program for the dishwasher has three different heating modes, which are: heat pump heating mode, electric heating mode, instant heating mode.
The heat pump heating mode is that the heat pump heating system is used for heating the washing water; the electric heating mode is that the washing water is heated by only using an electric heater; the quick heating mode is to heat the washing water by simultaneously starting the heat pump heating system and the electric heater. The user selects the three different heating modes to heat the washing water in the dishwasher through own selection.
Of course, an alarm device is further provided to ensure the system security in this embodiment. When the external environment does not meet the starting requirement of the heat pump, the warning device reminds the user of the current environment state, so that the user can conveniently select a specific heating mode.
Example 7
This embodiment is complementary to the electric heater of the above-described embodiment.
The electric heater in this embodiment does not simply heat the washing water, but heats the energy storage medium while heating the washing water, so as to raise the temperature of the energy storage medium.
In the embodiment, the temperature difference between the evaporator and the energy storage medium in the heat pump system is improved by fully utilizing the redundant heat of the electric heater and utilizing the method of heating the energy storage medium by the electric heater, so that the working efficiency of heat absorption of the evaporator is improved, and the heating of the washing water reaches the optimal balance in the adjustment of electric heating and heat pump system heating.
Example 8
This example is complementary to example 5.
In this embodiment, the dishwasher is provided with a controller inside, and temperature detection devices are respectively placed in the energy storage medium, the washing water and the external environment, and are electrically connected with the controller, and the controller receives the temperature information detected by the temperature detection devices.
The electric heating device comprises a first electric heating device which is arranged on the energy storage device and used for heating the energy storage medium; and a second electric heating device arranged on the washing water circuit and used for heating the washing water. The first and second electric heating means may be adjustable by the controller.
The controller controls and adjusts the power of the first electric heating device and the power of the second electric heating device according to the mutual relation of the electric quantity consumed by the first electric heating device, the electric quantity consumed by the operation of the heat pump system and the electric quantity consumed by the second electric heating device and the temperature information detected by the temperature detection device. Therefore, the mutual relation between the heat pump heating system and the electric heater is comprehensively coordinated, the washing water can be rapidly heated, the reasonable distribution of the electric quantity under different external environment temperature conditions can be met, and the purposes of high efficiency and energy conservation are achieved.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP4310412A4 (en) * | 2021-11-09 | 2024-07-31 | Midea Group (Shanghai) Co., Ltd. | HEAT EXCHANGER DEVICE AND DISHWASHER |
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| CN112022046B (en) * | 2019-06-04 | 2024-09-13 | 青岛海尔洗碗机有限公司 | Dishwasher casing heat exchange device and dishwasher |
| CN112022044B (en) * | 2019-06-04 | 2024-09-13 | 青岛海尔洗碗机有限公司 | Dishwasher and control method |
| CN112137542B (en) * | 2019-06-27 | 2024-07-30 | 青岛海尔洗碗机有限公司 | Dishwasher and control method |
| CN111685691B (en) * | 2019-11-04 | 2022-01-28 | 浙江三花智能控制股份有限公司 | Heat recovery device of dish washer |
| CN112790700A (en) * | 2019-11-13 | 2021-05-14 | 青岛海尔洗碗机有限公司 | Dish washing machine and control method thereof |
| CN113243867A (en) * | 2020-02-11 | 2021-08-13 | 青岛海尔洗碗机有限公司 | Heat pump type dish washing machine and control method thereof |
| CN115607085A (en) * | 2021-07-12 | 2023-01-17 | 重庆海尔洗衣机有限公司 | Dish washing machine with waste heat recovery function and control method |
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