CN111603038B

CN111603038B - Steaming and baking equipment

Info

Publication number: CN111603038B
Application number: CN202010446587.4A
Authority: CN
Inventors: 陈坚波; 张涛; 卢保东; 李亚军
Original assignee: Hisense Co Ltd
Current assignee: Hisense Co Ltd
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2021-08-03
Anticipated expiration: 2040-05-22
Also published as: CN111603038A

Abstract

The application discloses evaporate roast equipment relates to and evaporates roast technical field for solve inside the intensification of inner bag of current evaporate roast equipment slow and the relatively longer problem of preheating time that leads to. The application provides a steaming and baking equipment includes: a housing; the inner container is arranged inside the shell; the heating element can heat the inner container; the refrigerant circulating system comprises a compressor, and a first heat exchanger, a throttling device and a second heat exchanger are sequentially connected between an exhaust port of the compressor and an air suction port of the compressor; and the heat exchange medium in the heat exchange assembly can exchange heat with the inner container and the first heat exchanger, and is water or heat conduction oil. The steaming and baking equipment is used for baking food.

Description

Steaming and baking equipment

Technical Field

The application relates to the technical field of steaming and baking equipment, in particular to steaming and baking equipment.

Background

With the improvement of living standard of people, the steaming and baking equipment begins to enter a household kitchen. A steaming and baking apparatus is a sealed household appliance for baking food, and generally includes a steaming and baking oven and a microwave oven. The temperature of the steaming and baking equipment can be adjusted according to different baked foods, and the food such as roasted chicken, roasted duck, roasted bread, cakes and the like can be made by utilizing the steaming and baking equipment.

The steaming and baking device generally includes a housing, an inner container installed inside the housing, and a heating element for heating a space inside the inner container or food. In the specific use process, the heating element generates heat to enable the inner container to create a high-temperature heating environment inside, and the baked food in the steaming and baking chamber is baked and heated.

However, when the steaming and baking device in the prior art is in a working mode, the heating element heats the inside of the inner container, so that the temperature rise of the inside of the inner container is slow, the time spent for the internal temperature of the inner container to rise to the preset temperature is long, and a user needs to wait for a long time, which affects the user experience.

Disclosure of Invention

The utility model provides a steaming and baking equipment for solve the inside temperature rise slow of inner bag of current steaming and baking equipment, and the relatively longer problem of preheating time that leads to.

The steaming and baking equipment provided in the embodiment of the application comprises a shell; the inner container is arranged inside the shell; the heating element can heat the inner container; the refrigerant circulating system comprises a compressor, and a first heat exchanger, a throttling device and a second heat exchanger are sequentially connected between an exhaust port of the compressor and an air suction port of the compressor; and the heat exchange medium in the heat exchange assembly can exchange heat with the inner container and the first heat exchanger, and is water or heat conduction oil.

Compared with the scheme that the inner part of the inner container is heated only by the heating element in the prior art, the scheme of the application heats the inner container together by the heating element and the heat exchange device, so that the temperature in the inner container is rapidly increased, and the time spent for raising the temperature in the inner container of the steaming and baking equipment to the preset temperature is favorably shortened, and further improve the user experience. In addition, because the heat exchange medium is water or heat conduction oil, the water and the heat conduction oil have good heat conduction performance and are not inflammable and explosive, and the heat exchange between the heat exchange assembly and the inner container is safer and more reliable.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a first embodiment provided in the present application;

FIG. 2 is a schematic structural diagram of a side wall and a top wall of an inner container of a steaming and baking oven provided by an embodiment of the application;

fig. 3 is a schematic structural view of a rear side wall of an inner container of a steaming and baking oven provided in the embodiment of the present application;

fig. 4 is a schematic structural diagram of a functional module of a steaming and baking apparatus according to an embodiment of the present application;

FIG. 5 is a first control flow chart according to a first embodiment of the present disclosure;

FIG. 6 is a control flow chart of the first embodiment of the present application;

fig. 7 is a schematic structural diagram of a second embodiment provided in the present application;

FIG. 8 is a first control flow chart of a second embodiment of the present application;

FIG. 9 is a second control flow chart according to the second embodiment of the present application;

fig. 10 is a schematic structural diagram of a third embodiment provided in the present application;

FIG. 11 is a first control flow chart of a third embodiment of the present application;

FIG. 12 is a second control flow chart according to a third embodiment of the present application;

fig. 13 is a schematic structural diagram of a fourth embodiment according to the present application;

FIG. 14 is a first control flow chart of a fourth embodiment of the present application;

FIG. 15 is a second control flowchart of a fourth embodiment of the present application;

fig. 16 is a schematic structural diagram of another arrangement manner of a fourth connecting device in the fourth embodiment according to the present application;

FIG. 17 is a schematic structural view of the embodiment of the present application provided with a direction valve;

fig. 18 is a schematic structural diagram of a fifth embodiment provided in the present application;

FIG. 19 is a first control flow chart of a fifth embodiment of the present application;

FIG. 20 is a second control flowchart of a fifth embodiment of the present application;

fig. 21 is a schematic structural diagram of another arrangement manner of a fifth connecting device in the fifth embodiment according to the present application.

Reference numerals:

100-inner container; 200-a refrigerant cycle system; 201-a compressor; 202-a first heat exchanger; 203-a throttling device; 204-a second heat exchanger; 300-a heat exchange assembly; 301-a first savings box; 302-a third heat exchanger; 3021-heat exchange manifold; 3022-a first manifold; 3023-a second manifold; 303-first circulation pump; 304-an air pump; 305-a second savings box; 306-a second circulation pump; 307-first connecting means; 308-a second connecting means; 309-third connecting means; 310-a fourth connecting means; 311-a reversing valve; 312-a fifth connecting means; 400-control system.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to 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; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The steaming and baking equipment comprises a box body, a door body and a controller, wherein the box body comprises a shell, an inner container and a heating element, the inner container is arranged inside the shell to form a steaming and baking chamber, and a heat insulation layer is arranged between the shell and the inner container; the heating element is used for heating the steaming and baking chamber.

The front end of the steaming and baking chamber is provided with a taking and placing opening used for putting the baked food into the steaming and baking chamber and baking the food.

The door body is used for sealing the front end taking and placing opening of the steaming and baking chamber so as to form a closed space in the steaming and baking chamber and avoid heat loss of the steaming and baking chamber.

The heating element is fixedly arranged in the inner container and used for heating the inner container to provide heat for baking food.

The controller is used for controlling the steaming and baking equipment to operate different working modes, or is used for controlling the steaming and baking temperature and the steaming and baking time of the steaming and baking equipment.

Common steaming and baking devices include a steaming oven and a microwave oven.

Referring to fig. 1 to 3, a steaming and baking apparatus provided in an embodiment of the present application includes: a housing; the inner container 100, the inner container 100 is installed inside the outer casing; a heating element capable of heating the inner container 100; the refrigerant circulating system 200 comprises a compressor 201, and a first heat exchanger 202, a throttling device 203 and a second heat exchanger 204 are sequentially connected between an exhaust port of the compressor 201 and an air suction port of the compressor 201; the heat exchange assembly 300, a heat exchange medium in the heat exchange assembly 300 can exchange heat with the liner 100 and the first heat exchanger 202, and the heat exchange medium is water or heat conducting oil.

When the steaming and baking device provided by the embodiment of the application is in the working mode, the compressor 201 is started to provide power for the flow of the refrigerant in the refrigerant circulation passage, so that the high-temperature and high-pressure refrigerant discharged from the exhaust port of the compressor 201 is guided into the first heat exchanger 202, the high-temperature and high-pressure refrigerant in the first heat exchanger 202 can exchange heat with the heat exchange assembly 300, the temperature of the heat exchange medium in the heat exchange assembly 300 is increased, and then the heat exchange medium with higher temperature transfers heat to the inner container 100, so that the temperature inside the inner container 100 is increased, compared with the scheme that the inside of the inner container 100 is heated only by the heating element in the prior art, the scheme of the application heats the inner container 100 by the heating element and the heat exchange device together, so that the temperature inside the inner container 100 is rapidly increased, and the time spent on increasing the temperature inside the inner container 100 of the steaming and baking device to the preset temperature is favorably shortened, and further improve the user experience. In addition, because the heat exchange medium is water or heat conducting oil, the water and the heat conducting oil have good heat conducting performance and are not inflammable and explosive, and the heat exchange between the heat exchange assembly 300 and the inner container 100 is safer and more reliable.

In some embodiments of the present application, the heat exchange assembly 300 includes the first storage tank 301, at least a portion of the first heat exchanger 202 is disposed in the first storage tank 301, and the heat exchange medium is stored in the first storage tank 301, and compared to a scheme in which the first heat exchanger 202 is disposed in close contact with the first storage tank 301, at least a portion of the first heat exchanger 202 is disposed in the first storage tank 301, so that the heat exchange efficiency between the first heat exchanger 202 and the heat exchange medium in the first storage tank 301 can be improved.

Of course, the first heat exchanger 202 may also be arranged completely within the first reservoir tank 301.

In some embodiments of the present application, the heat exchange assembly 300 includes the third heat exchanger 302, the third heat exchanger 302 includes a heat exchange tube, the heat exchange tube is disposed on two parallel side walls and a rear side wall of the inner container 100, the heat exchange tube can exchange heat with each side wall of the inner container 100, and compared with the heat exchange tube disposed on only one side wall of the inner container 100, the heat exchange efficiency between the third heat exchange device and the inner container 100 can be improved.

The heat exchange tube can be one, and the heat exchange tube can be bent into different shapes according to the needs and wound on each side wall of the inner container 100 so as to realize the purpose of exchanging heat for each side wall of the inner container 100.

In order to further improve the heat exchange efficiency between the third heat exchanger 302 and the inner container 100, the heat exchange tube of the present application includes: a plurality of heat exchange branch pipes 3021, the plurality of heat exchange branch pipes 3021 being wound around the outer side of the inner container 100; a first header pipe 3022, the first header pipe 3022 communicating with the outlet of the first reservoir tank 301; the second header pipe 3023, the second header pipe 3023 is communicated with the inlet of the first reservoir tank 301, the plurality of heat exchange branch pipes 3021 are arranged between the first header pipe 3022 and the second header pipe 3023 in parallel, and by arranging the plurality of heat exchange branch pipes 3021, the length of each heat exchange branch pipe 3021 is relatively short, that is, the length of a flow path of a heat exchange medium in each heat exchange branch pipe 3021 can be reduced, the flow path of the heat exchange medium is prevented from being too long, and the flow direction along the heat exchange medium is caused, so that the heat exchange amount between the pipe section of each heat exchange branch pipe 3021 through which the heat exchange medium finally flows and the inner liner 100 is relatively small, and the heat exchange efficiency between the inner liner 100 and the third heat exchanger 302 is relatively low.

In order to improve the heat exchange efficiency between the heat exchange tube and the inner container 100, the heat exchange tube is made of a material having good heat conduction, rust resistance, corrosion resistance and aging resistance, for example, an aluminum tube, a stainless steel tube, a copper tube, or the like can be selected.

Because of the principle that hot air rises and cold air sinks, the temperature of the bottom in the inner container 100 is lower than the temperature of the top in the inner container 100, and in order to ensure that the heat exchange efficiency of the heat exchange medium in the heat exchange device and each area of the inner container 100 is better, in the embodiment of the present application, the first main pipe 3022 is arranged above the inner container 100, and the second main pipe 3023 is arranged below the inner container 100.

In particular use, since the outlet of the first accumulator tank 301 is in communication with the first manifold 3022, the inlet of the first accumulator tank 301 is in communication with the second manifold 3023, while the first manifold 3022 is disposed above the liner 100, the second manifold 3023 is disposed below the liner 100, so that the relatively high temperature heat exchange medium in the first reservoir tank 301 flows into the first main pipe 3022 above the inner container 100 first, then flows through a plurality of heat exchange branch pipes 3021 in sequence, and a second main pipe 3023 arranged below the inner container 100 returns to the first accumulation box 301 through the inlet of the first accumulation box 301, that is, the flow direction of the heat exchange medium in the first storage box 301 is from top to bottom, the heat exchange medium with higher relative temperature exchanges heat with the region with higher relative temperature inside the inner container 100 first, and then exchanges heat with the region with lower relative temperature inside the inner container 100, so that when the temperature of the inner container 100 is raised, the heat exchange efficiency between the heat exchange medium and each region of the inner container 100 is better.

Of course, the first header pipe 3022 may be disposed below the liner 100, and the second header pipe 3023 may be disposed above the liner 100, so as to control the flow direction of the heat exchange medium in the first header pipe 3022 and the second header pipe 3023 by adjusting the flow direction of the heat exchange medium.

Referring to fig. 3, the rear side wall of the liner 100 of the present application is provided with a plurality of vertically placed heat exchange branch pipes 3021, both ends of the plurality of heat exchange branch pipes 3021 are provided with bent portions, the bent portions can connect the plurality of heat exchange branch pipes 3021 between the first main pipe 3022 and the second main pipe 3023, and it can be ensured that the flow direction of the heat exchange medium in the heat exchange branch pipes 3021 provided on the rear side wall of the liner 100 is the same as the flow direction of the heat exchange medium in the heat exchange branch pipes 3021 on the left side wall and the right side wall of the liner 100.

The above-mentioned many heat transfer branch pipes 3021 of this application evenly lay in the outside of inner bag 100, specifically, in many heat transfer branch pipes 3021 that are parallel to each other promptly, the distance between two adjacent heat transfer branch pipes 3021 is the same to make the area of contact evenly distributed between heat transfer branch pipe 3021 and the inner bag 100, at the heat transfer in-process, make the heat transfer between inner bag 100 and the heat transfer device more even.

In some embodiments, the first manifold 3022 is disposed at an intermediate position on the upper sidewall of the liner 100, one end of the first manifold 3022 is directed toward the front end of the liner 100, the other end is directed toward the rear sidewall of the liner 100, the second manifold 3023 is disposed at an intermediate position on the lower sidewall of the liner 100, and are parallel to the first header pipe 3022, first ends of some of the heat exchange branch pipes 3021 of the plurality of heat exchange branch pipes 3021 are all communicated with the second header pipe 3023, and second ends thereof are all extended from the lower side wall of the inner container 100 to the left side wall of the inner container 100 and the upper side wall of the inner container 100 in sequence, then communicated with the first main pipe 3022, the first ends of the other part of the heat exchange branch pipes 3021 of the plurality of heat exchange branch pipes 3021 are communicated with the second main pipe 3023, and the second ends of the other part of the heat exchange branch pipes 3021 extend from the lower side wall of the liner 100 to the right side wall of the liner 100 and the upper side wall of the liner 100 in sequence, and then communicates with the second manifold 3023, so that heat exchange between each side wall of the inner container 100 and the heat exchange means is more uniform.

In some embodiments of the present application, the heat exchange tubes are disposed close to the inner container 100, so that a heat exchange area between the third heat exchanger 302 and the inner container 100 is increased, and a heat transfer rate between the third heat exchanger 302 and the inner container 100 can be further increased.

Furthermore, the throttling device 203 is an electronic expansion valve, thereby facilitating real-time adjustment of the refrigerant flowing through the throttling device 203.

Of course, the throttling device 203 may be a throttling capillary tube to save the manufacturing cost of the steaming and baking device.

The heat exchange assembly 300 further comprises a first circulating pump 303, wherein the first circulating pump 303 is arranged on a connecting pipeline between the third heat exchanger 302 and the first storage tank 301; an air pump 304, the air pump 304 being connected on the connecting conduit between the first circulation pump 303 and the third heat exchanger 302, i.e. in the flow direction of the heat exchange medium in the conduit, the air pump 304 being arranged upstream of the first circulation pump 303. The first circulation pump 303 described above can power the flow of the heat exchange medium between the third heat exchanger 302 and the first reservoir tank 301, so that the heat exchange medium can circulate in the third heat exchanger 302 and the first reservoir tank 301. The air pump 304 is connected to a connecting pipe between the first circulating pump 303 and the third heat exchanger 302, when the temperature of the heat exchange medium is lower than the temperature inside the inner container 100, the heat exchange medium cannot continuously supply heat to the inner container 100, at this time, the first circulating pump 303 is controlled to be closed, the flow of the heat exchange medium is stopped, the air pump 304 is controlled to be opened, air is injected into the third heat exchanger 302 from one end of the third heat exchanger 302, the heat exchange medium in the third heat exchanger 302 flows out from the other end of the third heat exchanger 302 under the extrusion of the air, and the heat exchange medium in the third heat exchanger 302 is prevented from reversely sucking the heat inside the inner container 100.

Wherein the above-mentioned air pump 304 and the first circulation pump 303 are provided on the connection pipe between the first header pipe 3022 in the third heat exchanger 302 and the outlet of the first reservoir tank 301, or on the connection pipe between the second header pipe 3023 in the third heat exchanger 302 and the inlet of the first reservoir tank 301.

In some embodiments of the present application, the heat exchange medium in the heat exchange assembly 300 can exchange heat with the second heat exchanger 204 and the inner container 100, when the steaming and baking apparatus exits the operating mode, the compressor 201 is turned on to provide power for the flow of the refrigerant in the refrigerant circulation path, so as to guide the high-temperature and high-pressure refrigerant discharged from the exhaust port of the compressor 201 into the first heat exchanger 202 for condensation, the condensed refrigerant flows into the throttling device 203 for throttling and expansion, then flows into the second heat exchanger 204 for evaporation, and exchanges heat with the heat exchange assembly 300, so that the temperature of the heat exchange assembly 300 is reduced, then the heat exchange assembly 300 with a lower temperature absorbs the heat of the inner container 100, so that the temperature inside the inner container 100 can be rapidly reduced, on the one hand, the continuous baking and heating of the baked food by the high-temperature waste heat inside the inner container 100 is avoided, and the optimal state of the baked food can be maintained, ensuring that the baked food has good taste and nutrient components; on the other hand, when the user takes out the baked food from the inner container 100, scalding accidents can be avoided, and the user experience is improved.

In some embodiments of the present application, the heat exchange assembly 300 further comprises a second reservoir 305, at least a portion of the second heat exchanger 204 is disposed in the second reservoir 305, and the second reservoir 305 stores the heat exchange medium. Compared with the scheme that the second heat exchanger 204 and the second storage box 305 are arranged in close contact, the arrangement that at least one part of the second heat exchanger 204 is arranged in the second storage box 305 can improve the heat exchange efficiency between the heat exchange medium in the second heat exchanger 204 and the heat exchange medium in the second storage box 305.

Of course, the second heat exchanger 204 may also be arranged completely within the second reservoir tank 305.

In some embodiments of the present application, an outlet of the second reservoir tank 305 is communicated with the second header pipe 3023, and an inlet of the second reservoir tank 305 is communicated with the first header pipe 3022, so that the heat exchange medium with a relatively low temperature in the second reservoir tank 305 flows into the second header pipe 3023 disposed below the liner 100, then flows through the plurality of heat exchange branch pipes 3021 and the first header pipe 3022 disposed above the liner 100 in sequence, and returns to the second reservoir tank 305 through the inlet of the second reservoir tank 305, that is, the flow direction of the heat exchange medium in the second reservoir tank 305 is from bottom to top, the heat exchange medium with a relatively low temperature region inside the liner 100 exchanges heat first, and then exchanges heat with a relatively high temperature region inside the liner 100, thereby ensuring that the heat exchange efficiency between the heat exchange medium and each region of the liner 100 is good when the liner 100 is cooled. Wherein, the arrow direction in fig. 2 and fig. 3 refers to the flowing direction of the heat exchange medium in the heat exchange tube when the inner container 100 is cooled.

The heat exchange assembly 300 further includes: a second circulation pump 306, the second circulation pump 306 being disposed on the connecting pipe between the third heat exchanger 302 and the second reservoir tank 305, and the air pump 304 being further connected to an end of the second circulation pump 306 remote from the second reservoir tank 305. The second circulation pump 306 described above can power the flow of the heat exchange medium between the third heat exchanger 302 and the second reservoir tank 305, so that the heat exchange medium can circulate in the third heat exchanger 302 and the second reservoir tank 305. The air pump 304 can also be connected to one end of the second circulation pump 306 far away from the second storage box 305, that is, along the flowing direction of the heat exchange medium in the pipeline, the air pump 304 is arranged on the upstream of the second circulation pump 306 to inject air into the third heat exchanger 302 from one end of the third heat exchanger 302, so that the low-temperature heat exchange medium in the third heat exchanger 302 flows out from the other end of the third heat exchanger 302 under the extrusion of the air, and further, the heat exchange medium stored in the third heat exchanger 302 can be prevented from sucking back the heat inside the inner container 100 when the steaming and baking device cooks next time.

Referring to fig. 1 and 4, the steaming and roasting equipment comprises a refrigerant circulation system 200, a heat exchange assembly 300 and a control system 400, wherein the control system 400 comprises a first temperature detection module, and the first temperature detection module is used for detecting the temperature of a heat exchange medium in a first storage box 301; a second temperature detection module for detecting the temperature inside the inner container 100; the controller is used for controlling the compressor 201, the first circulating pump 303 and the air pump 304 to be turned on or turned off according to the temperature of the heat exchange medium in the third heat exchanger 302 detected by the first temperature detection module and the temperature inside the inner container 100 detected by the second temperature detection module when the steaming and baking equipment is in the working mode; the controller is further configured to control the compressor 201, the second circulation pump 306, and the air pump 304 to be turned on or turned off according to the temperature value inside the inner container 100 detected by the second temperature detection module when the steaming and baking device exits the operating mode.

When the temperature controller is used specifically, the controller can acquire the temperature value of the heat exchange medium detected by the first temperature detection module in the third heat exchanger 302 and the temperature value detected by the second temperature detection module in the inner container 100, and compare the two temperature values, if the temperature value of the heat exchange medium is greater than the temperature value in the inner container 100, it is indicated that the heat exchange medium can provide heat for the inner container 100 at the moment, the controller controls the air pump 304 to be closed, the compressor 201 and the first circulating pump 303 to be both opened, so that the heat exchange medium circularly flows in the third heat exchanger 302 and the first storage box 301, and the third heat exchanger 302 continuously supplies heat to the inner container 100. If the temperature value of the heat exchange medium is less than or equal to the temperature value inside the inner container 100, that is, it indicates that the heat exchange medium cannot provide heat to the inner container 100 at this time, the controller controls the compressor 201 and the first circulation pump 303 to be both closed, so that the heat exchange medium stops flowing, and controls the air pump 304 to be opened, so that the heat exchange medium in the third heat exchanger 302 returns to the first storage tank 301, and the situation that the heat exchange medium in the third heat exchanger 302 sucks the heat inside the inner container 100 backwards is avoided.

If the second temperature detection module detects that the temperature inside the liner 100 is greater than the preset cooling temperature, the controller controls the air pump 304 to be turned off, and controls the compressor 201 and the second circulating pump 306 to be turned on, and at this time, the low-temperature heat exchange medium in the second storage box 305 circularly flows in the second storage box 305 and the third heat exchanger 302, so that the liner 100 is continuously cooled. If the inside temperature of second temperature detection module detection inner bag 100 is less than or equal to preset cooling temperature, it is relatively lower to show the inside temperature of inner bag 100 promptly, even the user touches inner bag 100 can not take place the danger of scald yet, controller control compressor 201 and second circulating pump 306 close this moment, make low temperature heat transfer medium stop flowing, and control air pump 304 opens, make heat transfer medium in third heat exchanger 302 get back to in second storage box 305, when avoiding the user to use the cooking of steaming and baking equipment next time, the heat transfer medium of third heat exchanger 302 is the inside heat of inner bag 100 of suck-back, and cause the inside slow problem of intensification of inner bag 100.

It should be noted that: the preset cooling temperature is preset and stored in the controller. Moreover, when steaming and roasting equipment is in the mode, can set up corresponding preset and evaporate roast time, the controller can also record the operating time that evaporates roast equipment, and when this operating time equals or is greater than preset and evaporates roast time, the controller control bee calling organ sends the warning signal, and when the controller received bee calling organ and sent the instruction of warning signal, the controller control second circulating pump 306, compressor 201 all opened. When the controller receives an instruction of sending a reminding signal by the buzzer, the steaming and baking is finished, the steaming and baking equipment exits the working mode, and the controller controls the second circulating pump 306 and the compressor 201 to be both opened so as to guide the heat exchange medium in the second storage box 305 into the third heat exchanger 302.

Further, the circulation pump in fig. 4 described above refers to the first circulation pump 303 and/or the second circulation pump 306.

In some embodiments, the third heat exchanger 302 and the first reservoir tank 301 and the second reservoir tank 305 are connected by a work valve set, and since the work valve set has different functions, there are various connection manners between the third heat exchanger 302 and the first reservoir tank 301 and the second reservoir tank 305. The heat exchange assembly 300 will be described in detail with reference to specific embodiments.

In some embodiments, the steaming and baking apparatus further comprises: the first connecting device 307 is used for connecting or disconnecting the third heat exchanger 302 with or from the first storage box 301, the second connecting device 308 is used for connecting or disconnecting the third heat exchanger 302 with or from the second storage box 305, when the steaming and roasting equipment is in an operating mode, the third heat exchanger 302 is connected with or from the first storage box 301 by the first connecting device 307, and the third heat exchanger 302 is disconnected with or from the second storage box 305 by the second connecting device 308, so that the high-temperature heat exchange medium in the first storage box 301 is led into the third heat exchanger 302, and the high-temperature heat exchange medium is prevented from flowing into a pipeline between the second connecting device 308 and the second storage box 305, the flow of the high-temperature heat exchange medium in a connecting pipeline between an outlet and an inlet of the second storage box 305 is reduced, and the heating effect of the inner container 100 is further improved.

Similarly, when the steaming and baking device exits the operating mode, the first connecting device 307 disconnects the third heat exchanger 302 from the first storage box 301, and the second connecting device 308 connects the third heat exchanger 302 with the second storage box 305, so as to further improve the cooling effect on the liner 100.

Example one

Referring to fig. 1, for the embodiment in which the first manifold 3022 is disposed above the liner 100 and the second manifold 3023 is disposed below the liner 100, the first connection device 307 is a first three-position four-way valve having an a end, a B end, a P end, and a T end, as well as a coil YA1 and a coil YA2, the a end of the first three-position four-way valve is communicated with the first manifold 3022, the P end of the first three-position four-way valve is communicated with the outlet of the first reservoir tank 301, the B end of the first three-position four-way valve is communicated with the second manifold 3023, the T end of the first three-position four-way valve is communicated with the inlet of the first reservoir tank 301, when the coils YA1 and YA2 are all de-energized, the first three-position four-way valve is in a neutral position function, and the a, B, P, and T ends of the first three-position four-way valve are all closed; when the coil YA1 is electrified and the coil YA2 is not electrified, the first three-position four-way valve is positioned at the left position, the end A and the end P of the first three-position four-way valve are communicated, and the end B and the end T of the first three-position four-way valve are communicated; when the coil YA1 is powered off and the coil YA2 is powered on, the first three-position four-way valve is positioned at the right position, the P end of the first three-position four-way valve is sealed, and the A end, the B end and the T end of the first three-position four-way valve are communicated.

The second connecting device 308 is a second three-position four-way valve, the second three-position four-way valve has an end a, an end B, an end P and an end T, and a coil YA3 and a coil YA4, the end a of the second three-position four-way valve is communicated with the second header pipe 3023, the end P of the second three-position four-way valve is communicated with the outlet of the second reservoir tank 305, the end B of the second three-position four-way valve is communicated with the first header pipe 3022, the end T of the second three-position four-way valve is communicated with the inlet of the second reservoir tank 305, when the coil YA3 and the coil YA4 are all de-energized, the second three-position four-way valve is in a neutral position function, and the end a, the end B, the end P and the end T of the second three-position four-way valve are all closed; when the coil YA3 is electrified and the coil YA4 is not electrified, the second three-position four-way valve is positioned at the left position, the end A and the end P of the second three-position four-way valve are communicated, and the end B and the end T of the second three-position four-way valve are communicated; when the coil YA3 is out of power and the coil YA4 is powered on, the second three-position four-way valve is positioned at the right position and can function, the P end of the second three-position four-way valve is closed, and the A end, the B end and the T end of the second three-position four-way valve are communicated.

In addition, in the first embodiment, the heat exchange medium in the pipeline between the air pump 304 and the first three-position four-way valve is introduced through the a end of the first three-position four-way valve and then discharged through the T end of the first three-position four-way valve, and the heat exchange medium in the pipeline between the air pump 304 and the second three-position four-way valve can be introduced through the a end of the second three-position four-way valve and then discharged through the T end of the second three-position four-way valve.

The operation states of the components in the steaming and baking apparatus in the first technical solution provided by the above embodiment under different working conditions will be described in more detail with reference to table 1, where "+" in table 1 indicates power on and "-" in table 1 indicates power off.

Table 1 table of operation conditions of embodiment one

Working condition 1: if the steaming and roasting equipment is in the working mode, that is, it indicates that the temperature of the liner 100 needs to be raised at this time, the controller controls the first circulating pump 303 to be turned on, and controls the coil YA1 to be powered, that is, the first three-position four-way valve is in the left-position function, the high-temperature heat exchange medium in the first storage box 301 enters the heat exchange branch pipe 3021 from the first main pipe 3022, and is discharged from the second main pipe 3023 after heat exchange between the heat exchange branch pipe 3021 and the liner 100.

Working condition 2: if the steaming and baking device is in the working mode and the maximum limit temperature value T of the heat exchange medium in the third heat exchanger 302 is higher than the preset limit temperature value T_rs' less than the temperature T inside the inner container 100, which means that the heat exchange medium cannot provide heat to the inner container 100, the controller controls the coil YA2 to be powered on, the first three-position four-way valve is in the right position function, the first circulation pump 303 is powered off, the air pump 304 is powered on, and air enters from the first main pipe 3022 of the third heat exchanger 302, so that the high-temperature heat exchange medium in the third heat exchanger 302 is discharged through the second main pipe 3023.

Working condition 3: if the steaming and baking device exits the operating mode, the coil YA1 and the coil YA2 of the controller lose power, the first three-position four-way valve is in a middle position function, the coil YA3 is powered, the second three-position four-way valve is in a left position function, the second circulating pump 306 is powered, the low-temperature heat exchange medium in the second storage box 305 enters the heat exchange branch pipe 3021 from the second main pipe 3023 below the inner container 100, and is discharged out of the third heat exchanger 302 from the first main pipe 3022 above the inner container 100 after heat exchange between the heat exchange branch pipe 3021 and the inner container 100, namely, the flow direction of the heat exchange medium is from top to bottom.

Working condition 4: if the steaming and baking device exits the operating mode and the temperature T inside the inner container 100 is less than the preset cooling temperature T', the controller controls the coil YA4 to be powered on, the second three-position four-way valve is in the right position function, the second circulating pump 306 is powered off, the air pump 304 is powered on, and the low-temperature heat exchange medium in the third heat exchanger 302 is discharged through the second header pipe 3023.

Referring to fig. 5 and 6, since the heat exchange medium in the first storage tank 301 is heated by the first heat exchanger 202, the temperature of the heat exchange medium is limited, and the operation mode of the heat exchange assembly 300 is divided into two modes, i.e., a first operation mode and a second operation mode, according to the maximum limit temperature value of the heat exchange medium and the preset temperature value when the steaming and baking apparatus is in the operation mode.

The specific working process of the heat exchange assembly 300 is as follows: when the steaming and baking equipment is in a working mode, the compressor 201, the heating element and the first circulating pump 303 are controlled to be started, the coil YA1 is controlled to be powered on, meanwhile, the controller can obtain the current temperature T in the second temperature detection module for detecting the inner container 100, and the highest limit temperature value T of the heat exchange medium_rs' and a preset temperature value T of the steaming and baking equipment_gz' make a comparison to determine the operating mode of the heat exchange assembly 300.

When the heat exchange assembly 300 is in the first working mode, comparing the temperature T inside the inner container 100 with the maximum limit temperature value T of the heat exchange medium_rs' size, when T.gtoreq.T_rsWhen the heat exchanger is empty, the controller controls the first circulating pump 303 and the compressor 201 to be closed, controls the air pump 304 to be opened, controls the coil YA2 to be powered on, controls the coil YA1 to be powered off, and controls the air pump 304 to be closed and controls the coil YA2 to be powered off after the heat exchange medium in the third heat exchanger 302 is emptied. In addition, after the steps of controlling the air pump 304 to be turned on, the coil YA2 to be powered on, and the coil YA1 to be powered off, the method further comprises the following steps: comparing the temperature T inside the inner container 100 with a preset temperature value T_gz', when T is more than or equal to T_gzWhen the air pump 304 is not turned off, it indicates that the heat exchange medium in the third heat exchanger 302 is presentContinuing to wait for the air pump to turn off when the air pump is not emptied; if the air pump 304 is turned off, it indicates that the steaming and baking device is finished.

When the heat exchange assembly 300 is in the second working mode, comparing the temperature T inside the inner container 100 with the preset temperature value T_gz' size, when T.gtoreq.T_gzWhen the heat exchanger is empty, the controller controls the first circulating pump 303, the compressor 201 and the heating element to be turned off, controls the air pump 304 to be turned on, controls the coil YA2 to be powered on, controls the coil YA1 to be powered off, controls the air pump 304 to be turned off, controls the coil YA2 to be powered off after the heat exchange medium in the third heat exchanger 302 is emptied, and ends the work.

When the steaming and baking equipment exits the working mode, the compressor 201 and the second circulating pump 306 are controlled to be both started, the coil YA3 is controlled to be powered on, meanwhile, the controller can obtain the current temperature T in the inner container 100 detected by the second temperature detection module, the current temperature T in the inner container 100 is compared with the preset cooling temperature T ', when the T is less than or equal to the T', the compressor 201 and the second circulating pump 306 are controlled to be both stopped, the air pump 304 is controlled to be started, the coil YA4 is powered on, after the heat exchange medium in the third heat exchanger 302 is emptied, the air pump 304 is controlled to be stopped, the coil YA4 is powered off, and the cooling of the inner container 100 is finished.

Example two

Embodiment two on the basis of the embodiment one, the flow direction of the heat exchange medium in the first reservoir tank 301 and the second reservoir tank 305 in the third heat exchanger 302 can be adjusted by changing the first connecting device 307 and the second connecting device 308.

Referring to fig. 7, for the technical solution that the first manifold 3022 is disposed below the inner container 100 and the second manifold 3023 is disposed above the inner container 100, the first connecting device 307 is a third three-position four-way valve, the third three-position four-way valve has an a end, a B end, a P end, a T end, a coil YA5 and a coil YA6, the a end of the third three-position four-way valve is communicated with the first manifold 3022, the P end of the third three-position four-way valve is communicated with the outlet of the first reservoir tank 301, the B end of the third three-position four-way valve is communicated with the second manifold 3023, the T end of the third three-position four-way valve is communicated with the inlet of the first reservoir tank 301, when the coil YA5 and the coil YA6 are both de-energized, the third three-position four-way valve is in the neutral function, and the a end, the B end, the P end, and the T end of the third four-way valve are all closed; when the coil YA5 is electrified and the coil YA6 is not electrified, the third three-position four-way valve is positioned at the left position, the end A of the third three-position four-way valve is communicated with the end P, and the end B of the third three-position four-way valve is communicated with the end T; when the coil YA5 is powered off and the coil YA6 is powered on, the third three-position four-way valve is positioned at the right position, the P end and the B end of the third three-position four-way valve are communicated, and the A end and the T end of the third three-position four-way valve are communicated.

The second connecting device 308 is a fourth three-position four-way valve, the fourth three-position four-way valve has an end a, an end B, an end P and an end T, and a coil YA7 and a coil YA8, the end a of the fourth three-position four-way valve is communicated with the second header pipe 3023, the end P of the fourth three-position four-way valve is communicated with the outlet of the second reservoir tank 305, the end B of the fourth three-position four-way valve is communicated with the first header pipe 3022, the end T of the fourth three-position four-way valve is communicated with the inlet of the second reservoir tank 305, when the coil YA7 and the coil YA8 are all de-energized, the fourth three-position four-way valve is in a neutral position function, and the end a, the end B, the end P and the end T of the fourth three-position four-way valve are all closed; when the coil YA7 is electrified and the coil YA8 is not electrified, the fourth three-position four-way valve is positioned at the left position, the end A of the fourth three-position four-way valve is communicated with the end P, and the end B of the fourth three-position four-way valve is communicated with the end T; when the coil YA7 is powered off and the coil YA8 is powered on, the fourth three-position four-way valve is positioned on the right position, the P end and the B end of the fourth three-position four-way valve are communicated, and the A end and the T end of the fourth three-position four-way valve are communicated.

The working states of the components in the steaming and baking device in the second technical solution provided by the above embodiment under different working conditions will be described in more detail with reference to table 2, wherein "+" in table 2 indicates power on, and "-" in table 2 indicates power off.

TABLE 2 table of the second embodiment

Working condition 5: if the steaming and roasting equipment is in the working mode, that is, it indicates that the temperature of the liner 100 needs to be raised at this time, the controller controls the first circulating pump 303 to be turned on, and controls the coil YA5 to be powered, that is, the third three-position four-way valve is in the left-position function, the high-temperature heat exchange medium in the first storage box 301 enters the heat exchange branch pipe 3021 from the first main pipe 3022, and is discharged from the second main pipe 3023 after heat exchange between the heat exchange branch pipe 3021 and the liner 100.

Working condition 6: if the steaming and roasting equipment is in the working mode, that is, the temperature of the liner 100 needs to be raised at this time, the controller controls the first circulating pump 303 to be turned on, and controls the coil YA6 to be powered, that is, the third three-position four-way valve is in the right position function, the high-temperature heat exchange medium in the first storage box 301 enters the heat exchange branch pipe 3021 from the second main pipe 3023, and is discharged from the first main pipe 3022 after heat exchange between the heat exchange branch pipe 3021 and the liner 100.

The flow directions of the heat exchange media with higher relative temperatures in the working conditions 5 and 6 are opposite.

Working condition 7: if the steaming and baking device is in the working mode and the maximum limit temperature value T of the heat exchange medium in the third heat exchanger 302 is higher than the preset limit temperature value T_rsWhen the temperature T is lower than the temperature T in the inner container 100, it means that the heat exchange medium cannot provide heat to the inner container 100, the controller controls the coil YA5 to be powered on, the third three-position four-way valve is in the right position function, the first circulating pump 303 is powered off, the air pump 304 is powered on, and the high-temperature heat exchange medium in the third heat exchanger 302 is discharged through the second header pipe 3023.

Working condition 8: if the steaming and roasting equipment exits the working mode, the controller controls the coil YA7 to be powered, the fourth three-position four-way valve is in a left position function, the second circulating pump 306 is powered, the low-temperature heat exchange medium in the second storage box 305 enters the heat exchange branch pipe 3021 from the second main pipe 3023, and is discharged from the first main pipe 3022 after heat exchange in the heat exchange branch pipe 3021 and the liner 100.

Working condition 9: if the steaming and roasting equipment exits the working mode, the controller controls the coil YA8 to be powered, the fourth three-position four-way valve is in the right position function, the second circulating pump 306 is powered, the low-temperature heat exchange medium in the second storage box 305 enters the heat exchange branch pipe 3021 from the first main pipe 3022, and is discharged from the second main pipe 3023 after heat exchange with the liner 100 in the heat exchange branch pipe 3021.

The flow directions of the heat exchange media with lower relative temperatures in the working conditions 8 and 9 are opposite.

Working condition 10: if the steaming and baking device is in the working mode and the temperature inside the inner container 100 is less than or equal to the preset cooling temperature, the controller controls the coil YA8 to be powered on, the fourth three-position four-way valve is in the right position function, the first circulating pump 303 is powered off, the air pump 304 is powered on, and the high-temperature heat exchange medium in the third heat exchanger 302 is discharged through the second header pipe 3023.

Referring to fig. 8 to 9, since the heat exchange medium in the first storage tank 301 is heated by the first heat exchanger 202, the temperature of the heat exchange medium is limited, and the operation mode of the heat exchange assembly 300 is divided into two modes, i.e., a first operation mode and a second operation mode, according to the maximum limit temperature value of the heat exchange medium and the preset temperature value of the steaming and baking apparatus in the operation mode.

The specific working process of the heat exchange assembly 300 is as follows: when the steaming and baking equipment is in a working mode, the compressor 201, the heating element and the first circulating pump 303 are controlled to be started, the coil YA5 is controlled to be powered on, meanwhile, the controller can obtain the current temperature T in the second temperature detection module for detecting the inner container 100, and the highest limit temperature value T of the heat exchange medium_rs' and a preset temperature value T of the steaming and baking equipment_gz' make a comparison to determine the operating mode of the heat exchange assembly 300.

When the heat exchange assembly 300 is in the first working mode, comparing the temperature T inside the inner container 100 with the maximum limit temperature value T of the heat exchange medium_rs' size, when T.gtoreq.T_rsWhen the heat exchanger is used, the controller controls the first circulating pump 303 and the compressor 201 to be closed, controls the air pump 304 to be opened, controls the coil YA6 to be electrified, controls the air pump 304 to be closed after the heat exchange medium in the third heat exchanger 302 is emptied, and controls the coil YA6 to be electrified. In addition, after the step of controlling the air pump 304 to be turned on and controlling the coil YA6 to be powered, the method further comprises the following steps: comparing the temperature T inside the inner container 100 with a preset temperature value T_gz', when T is more than or equal to T_gzIf the air pump 304 is not turned off, it indicates that the heat exchange medium in the third heat exchanger 302 is not emptied, and continues to wait for the turning off of the air pump; if the air pump 304 is turned off, it indicates that the steaming and baking device is finished.

When the heat exchange assembly 300 is in the second operating mode, the ratioThe temperature T inside the inner container 100 and the preset temperature value T_gz' size, when T.gtoreq.T_gzWhen the heat exchanger is in use, the controller controls the first circulating pump 303, the compressor 201 and the heating element to be turned off, controls the air pump 304 to be turned on, controls the coil YA6 to be powered on, controls the air pump 304 to be turned off, controls the coil YA6 to be powered off after the heat exchange medium in the third heat exchanger 302 is emptied, and ends the work.

When the steaming and baking equipment exits the working mode, the compressor 201 and the second circulating pump 306 are controlled to be started, the coil YA7 is controlled to be powered on, meanwhile, the controller can obtain the current temperature T inside the inner container 100 detected by the second temperature detection module, the current temperature T inside the inner container 100 is compared with the preset cooling temperature T ', when the T is less than or equal to the T', the compressor 201 and the second circulating pump 306 are controlled to be closed, the air pump 304 is controlled to be started, the coil YA8 is powered on, after the heat exchange medium in the third heat exchanger 302 is emptied, the air pump 304 is controlled to be closed, the coil YA8 is controlled to be powered off, and the cooling is finished.

It should be noted that: the control flow in fig. 8 is a control flow chart when the high-temperature heat exchange medium in the first accumulator tank 301 is taken in from the first header pipe 3022 and discharged from the second header pipe 3023, and the control flow in fig. 9 is a control flow chart when the low-temperature heat exchange medium in the second accumulator tank 305 is taken in from the second header pipe 3023 and discharged from the first header pipe 3022.

EXAMPLE III

In some embodiments of the present application, the above steaming and baking apparatus further includes a third connecting device 309, the third connecting device 309 is used for communicating the first reservoir tank 301 and the third heat exchanger 302, or is used for communicating the second reservoir tank 305 and the third heat exchanger 302, wherein the first circulating pump 303 is disposed on a connecting pipeline between the third connecting device 309 and the third heat exchanger 302, so that only one circulating pump needs to be disposed to drive the heat exchange medium in the first reservoir tank 301 and the second reservoir tank 305, compared with the first and second embodiments, thereby simplifying the structural complexity of the heat exchange assembly 300 and reducing the manufacturing cost of the steaming and baking apparatus.

Referring to fig. 10, the third connecting device 309 is a two-position six-way valve, the two-position six-way valve has an a end, a B end, a P end, a T end, an R end and an S end, and a coil YA9 and a coil YA10, the a end of the two-position six-way valve is communicated with the first manifold 3022, the B end of the two-position six-way valve is communicated with the second manifold 3023, the P end of the two-position six-way valve is communicated with the outlet of the first reservoir tank 301, the T end of the two-position six-way valve is communicated with the inlet of the first reservoir tank 301, the R end of the two-position six-way valve is communicated with the outlet of the second reservoir tank 305, the S end of the two-position six-way valve is communicated with the inlet of the second reservoir tank 305, when the coil YA9 is powered and the coil YA10 is powered off, the two-position six-position two-position six-way valve is left, the a end and the P end of the two-position six-way valve are communicated, the B end and the T end of the two-position six-way valve are both closed; when the coil YA9 is powered off and the coil YA10 is powered on, the two-position six-way valve is positioned at the right position, the end A and the end R of the two-position six-way valve are communicated, the end B and the end S of the two-position six-way valve are communicated, and the end P and the end T of the two-position six-way valve are both closed.

The operation states of the components in the steaming and baking apparatus in the third embodiment under different working conditions will be described in more detail with reference to table 3, where "+" in table 3 indicates power on and "-" in table 3 indicates power off.

TABLE 3 table of the third embodiment

YA9	YA10	First circulating pump	Air pump	Working conditions
					+	-	+	-	Operating mode 11
+	-	-	+	Operating mode 12
					-	+	+	-	Operating mode 13
-	+	-	+	Operating condition 14

Working condition 11: if the steaming and roasting equipment is in the working mode, that is, it indicates that the temperature of the liner 100 needs to be raised at this time, the controller controls the first circulating pump 303 to be turned on, and the coil YA9 is powered on, that is, the two-position four-way valve is in the left-position function, the high-temperature heat exchange medium in the first storage box 301 enters the heat exchange branch pipe 3021 from the first main pipe 3022, and is discharged from the second main pipe 3023 after heat exchange with the liner 100 in the heat exchange branch pipe 3021.

Working condition 12: if the steaming and baking device is in the working mode and the maximum limit temperature value T of the heat exchange medium in the third heat exchanger 302 is higher than the preset limit temperature value T_rs' less than the temperature T inside the liner 100 indicates that the heat exchange medium cannot provide heat to the liner 100, the controller controls the first circulation pump 303 to lose power and the air pump 304 to get power, and the high-temperature heat exchange medium in the third heat exchanger 302 is discharged through the second header pipe 3023.

Working condition 13: if the steaming and roasting equipment exits the working mode, the coil YA10 of the controller is powered on, the two-position four-way valve is in a left-position function, the first circulating pump 303 is controlled to be powered on, the low-temperature heat exchange medium in the second storage box 305 enters the heat exchange branch pipe 3021 from the first main pipe 3022, and is discharged from the second main pipe 3023 after heat exchange with the liner 100 in the heat exchange branch pipe 3021.

Working condition 14: if the steaming and roasting equipment exits the working mode, the coil YA10 of the controller is powered on, the two-position four-way valve is in the left-position function, the first circulating pump 303 is controlled to be powered off, the air pump 304 is controlled to be powered on, and air enters from the first main pipe 3022 so as to discharge the low-temperature heat exchange medium in the third heat exchanger 302 through the second main pipe 3023.

Referring to fig. 11 to 12, since the heat exchange medium in the first reservoir tank 301 is heated by the first heat exchanger 202, the temperature of the heat exchange medium is limited, and hereinafter, according to the maximum limit temperature value T of the heat exchange medium_rs' and a preset temperature value T when the steaming and baking equipment is in a working mode_gz', the operation mode of the heat exchange assembly 300 is divided into two modes, i.e., a first operation mode and a second operation mode.

The specific working process of the heat exchange assembly 300 is as follows: when the steaming and baking equipment is in a working mode, the compressor 201, the heating element and the first circulating pump 303 are controlled to be started, the coil YA9 is controlled to be powered on, meanwhile, the controller can obtain the current temperature T in the second temperature detection module for detecting the inner container 100, and the highest limit temperature value T of the heat exchange medium_rs' and a preset temperature value T of the steaming and baking equipment_gz' make a comparison to determine the operating mode of the heat exchange assembly 300.

When the heat exchange assembly 300 is in the first working mode, comparing the temperature T inside the inner container 100 with the maximum limit temperature value T of the heat exchange medium_rs' size, when T.gtoreq.T_rsWhen the heat exchanger is powered off, the controller controls the first circulating pump 303 and the compressor 201 to be turned off, controls the air pump 304 to be turned on, and controls the air pump 304 to be turned off and the coil YA9 to be powered off after the heat exchange medium in the third heat exchanger 302 is emptied. In addition, after the step of controlling the air pump 304 to be turned on, the method further comprises the step of comparing the temperature T inside the liner 100 with the preset temperature value T_gz', when T is more than or equal to T_gzWhen the controller is in the 'on' state, the heating element is controlled to be turned off, and whether the air pump 304 is turned off or not is judged,if the air pump 304 is not turned off, which indicates that the heat exchange medium in the third heat exchanger 302 is not exhausted, continuing to wait for turning off the air pump; if the air pump 304 is turned off, it indicates that the steaming and baking device is finished.

When the heat exchange assembly 300 is in the second working mode, comparing the temperature T inside the inner container 100 with the preset temperature value T_gz' size, when T.gtoreq.T_gzWhen the heat exchanger is in use, the controller controls the first circulating pump 303, the compressor 201 and the heating element to be turned off, controls the air pump 304 to be turned on, controls the air pump 304 to be turned off and controls the coil YA9 to be powered off after the heat exchange medium in the third heat exchanger 302 is emptied, and the work is finished.

When the steaming and baking equipment exits from the working mode, the compressor 201 and the first circulating pump 303 are controlled to be both started, the coil YA10 is controlled to be powered on, meanwhile, the controller can obtain the current temperature T inside the inner container 100 detected by the second temperature detection module, the current temperature T inside the inner container 100 is compared with the preset cooling temperature T ', when the temperature T is less than or equal to T', the compressor 201 and the first circulating pump 303 are controlled to be both stopped, the air pump 304 is controlled to be started, after the heat exchange medium in the third heat exchanger 302 is emptied, the air pump 304 is controlled to be stopped, the coil YA10 is controlled to be powered off, and the cooling is finished.

Example four

Based on the third embodiment, the steaming and baking device further comprises: a fourth connecting device 310, wherein the fourth connecting device 310 is used for communicating the outlet of the third connecting device 309 with the first main pipe 3022 or the second main pipe 3023, and the flow direction of the heat exchange medium in the third heat exchanger 302 can be adjusted through the fourth connecting device 310, so that the flow direction of the heat exchange medium is from top to bottom when the inner container 100 is heated. When the inner container 100 is cooled, the flowing direction of the heat exchange medium is from bottom to top, so that the heating and cooling effects of the inner container 100 are better on the basis that the steaming and baking device only comprises the third connecting device 309.

Referring to fig. 13, the fourth connecting device 310 is a fifth three-position four-way valve, the fifth three-position four-way valve has an a end, a B end, a P end and a T end, and a coil YA11 and a coil YA12, the a end of the fifth three-position four-way valve is communicated with the first manifold 3022, the B end of the fifth three-position four-way valve is communicated with the second manifold 3023, the P end of the fifth three-position four-way valve is communicated with the outlet of the first reservoir tank 301, the T end of the fifth three-position four-way valve is communicated with the inlet of the first reservoir tank 301, when the coil YA11 is powered off and the coil YA12 is powered off, the fifth three-position four-way valve is in a neutral position function, and the a end, the P end, the B end and the T end of the fifth three-position four-way valve are all closed; when the coil YA11 is electrified and the coil YA12 is not electrified, the fifth three-position four-way valve is positioned at the left position, the end A of the fifth three-position four-way valve is communicated with the end P, and the end B of the fifth three-position four-way valve is communicated with the end T; when the coil YA11 is de-energized and the coil YA12 is energized, the fifth three-position four-way valve is located at the right position, the end a and the end T of the fifth three-position four-way valve are communicated, and the end B and the end P of the fifth three-position four-way valve are communicated, so that a high-temperature heat exchange medium can enter from the first main pipe 3022 or the second main pipe 3023 and can be discharged from the other of the first main pipe 3022 and the second main pipe 3023, and similarly, the low-temperature heat exchanger can enter from the first main pipe 3022 or the second main pipe 3023 and can be discharged from the other of the first main pipe 3022 and the second main pipe 3023, that is, the flowing direction of the heat exchange medium can be adjusted as required.

In order to facilitate understanding of the solution of the present embodiment by those skilled in the art, the following will describe, in combination with table 4 and fig. 13, more clearly and in detail, the operating states of the various components in the steaming and baking apparatus under different working conditions in the solution provided in the fourth embodiment, where "+" in table 4 indicates power on and "-" in table 4 indicates power off.

TABLE 4 table of the fourth embodiment

YA9

YA10

YA11

YA12

First circulating pump

Air pump

Working conditions

+

-

+

-

+

-

Operating mode 15

+

-

+

-

Operating mode 16

+

-

+

-

+

Operating mode 17

-

+

-

+

-

Operating condition 18

-

+

-

+

-

Operating mode 19

-

+

-

+

Operating mode 20

Working condition 15: if the steaming and roasting equipment is in the working mode, that is, the temperature of the liner 100 needs to be raised at this time, the controller controls the first circulating pump 303 to be turned on, and controls the coil YA9 to be powered and the coil YA11 to be powered, so that the high-temperature heat exchange medium in the first storage box 301 enters the heat exchange branch pipe 3021 from the first main pipe 3022, and is discharged from the second main pipe 3023 after the heat exchange medium in the heat exchange branch pipe 3021 and exchanges heat with the liner 100.

Working condition 16: if the steaming and roasting equipment is in the working mode, that is, the temperature of the liner 100 needs to be raised at this time, the controller controls the first circulating pump 303 to be turned on, and controls the coil YA9 to be powered and the coil YA12 to be powered, so that the high-temperature heat exchange medium in the first storage box 301 enters the heat exchange branch pipe 3021 from the second main pipe 3023, and is discharged from the first main pipe 3022 after the heat exchange medium in the heat exchange branch pipe 3021 and exchanges heat with the liner 100.

The difference between the operating condition 15 and the operating condition 16 is that the flow direction of the heat exchange medium in the first reservoir tank 301 in the third heat exchanger 302 is opposite.

Working condition 17: if the steaming and baking device is in the working mode and the maximum limit temperature value T of the heat exchange medium in the third heat exchanger 302 is higher than the preset limit temperature value T_rs' smaller than the inside of the inner container 100The controller controls the coil YA9 to be powered on, the coil YA11 to be powered on, the first circulating pump 303 to be powered off, and the air pump 304 to be powered on, so that the heat exchange medium in the third heat exchanger 302 is discharged from the second header pipe 3023.

Working condition 18: if the steaming and roasting equipment exits the working mode, the controller controls the coil YA10 to be electrified and the coil YA11 to be electrified, so that the low-temperature heat exchange medium in the second storage box 305 enters the heat exchange branch pipe 3021 from the first main pipe 3022, and is discharged from the second main pipe 3023 after the heat exchange medium in the heat exchange branch pipe 3021 exchanges heat with the liner 100.

Working condition 19: if the steaming and roasting equipment exits the working mode, the controller controls the coil YA10 to be powered and the coil YA12 to be powered, so that the low-temperature heat exchange medium in the second storage box 305 enters the heat exchange branch pipe 3021 from the second main pipe 3023 and is discharged from the first main pipe 3022 after the heat exchange medium in the heat exchange branch pipe 3021 and exchanges heat with the liner 100.

The difference between the operating condition 15 and the operating condition 16 is that the flow direction of the heat exchange medium in the second reservoir tank 305 in the third heat exchanger 302 is opposite.

Working condition 20: if the steaming and baking device exits the operating mode and the temperature T inside the inner container 100 is less than or equal to the preset cooling temperature T', the controller controls the compressor 201 and the first circulating pump 303 to be turned off, controls the coil YA11 to be powered on, controls the air pump 304 to be powered on, and discharges the low-temperature heat exchange medium in the second storage box 305 from the second header pipe 3023.

It is to be noted that the above-described operating conditions of 15 to 20 are described as the first circulation pump 303 and the air pump 304 both being provided on the connection pipe between the outlet of the third connecting device and the first manifold 3022.

Of course, the first circulation pump 303 and the air pump 304 described above may also be provided on the connection pipe between the inlet of the third connection device and the second manifold 3023.

Referring to fig. 14 to 15, since the heat exchange medium in the first storage tank 301 is heated by the first heat exchanger 202, the temperature of the heat exchange medium is limited, and the operation mode of the heat exchange assembly 300 is divided into two modes, i.e., a first operation mode and a second operation mode, according to the maximum limit temperature value of the heat exchange medium and the preset temperature value when the steaming and baking apparatus is in the operation mode.

The specific working process of the heat exchange assembly 300 is as follows: when the steaming and baking equipment is in a working mode, the compressor 201, the heating element and the first circulating pump 303 are controlled to be started, the coil YA9 is controlled to be powered on, the coil YA11 is controlled to be powered on, meanwhile, the controller can obtain the current temperature T in the inner container 100 detected by the second temperature detection module, and the highest limit temperature value T of the heat exchange medium is used_rs' and a preset temperature value T of the steaming and baking equipment_gz' make a comparison to determine the operating mode of the heat exchange assembly 300.

When the heat exchange assembly 300 is in the first working mode, comparing the temperature T inside the inner container 100 with the maximum limit temperature value T of the heat exchange medium_rs' size, when T.gtoreq.T_rsWhen the heat exchanger is powered off, the controller controls the first circulating pump 303 and the compressor 201 to be turned off, controls the air pump 304 to be turned on, and controls the coil YA9 to be powered off and the coil YA11 to be powered off after the heat exchange medium in the third heat exchanger 302 is emptied. Further, after the step of controlling the air pump 304 to be turned on, the method further includes: comparing the temperature T inside the inner container 100 with a preset temperature value T_gz', when T is more than or equal to T_gzIf the air pump 304 is not turned off, it indicates that the heat exchange medium in the third heat exchanger 302 is not emptied, and continues to wait for the turning off of the air pump; if the air pump 304 is turned off, it indicates that the steaming and baking device is finished.

When the heat exchange assembly 300 is in the second working mode, comparing the temperature T inside the inner container 100 with the preset temperature value T_gz' size, when T.gtoreq.T_gzWhen the heat exchanger is in use, the controller controls the first circulating pump 303, the compressor 201 and the heating element to be turned off, controls the air pump 304 to be turned on, controls the air pump 304 to be turned off, controls the coil YA9 to be powered off, controls the coil YA11 to be powered off after the heat exchange medium in the third heat exchanger 302 is emptied, and ends the work.

When the steaming and baking equipment exits the working mode, the compressor 201 and the first circulating pump 303 are controlled to be started, the coil YA10 is powered on, the coil YA12 is powered on, meanwhile, the controller can obtain the current temperature T inside the inner container 100 detected by the second temperature detection module, the current temperature T inside the inner container 100 is compared with the preset cooling temperature T ', when the temperature T is less than or equal to T', the compressor 201 and the first circulating pump 303 are controlled to be stopped, the air pump 304 is controlled to be started, the coil YA11 is powered on, after a heat exchange medium in the third heat exchanger 302 is emptied, the air pump 304 is controlled to be stopped, the coil YA10 is powered off, the coil YA11 is powered off, and cooling is finished.

It should be noted that: the control flow in fig. 14 described above is a control flow chart when the high-temperature heat exchange medium in the first accumulator tank 301 is taken in from the first header pipe 3022 and discharged from the second header pipe 3023, and the control flow in fig. 15 is a control flow chart when the low-temperature heat exchange medium in the second accumulator tank 305 is taken in from the second header pipe 3023 and discharged from the first header pipe 3022.

Referring to fig. 16, the fourth connecting device 310 is a sixth three-position four-way valve having an a terminal, a B terminal, a P terminal, and a T terminal, and a coil YA11 and a coil YA12, the a terminal of the sixth three-position four-way valve is communicated with the first manifold 3022, the B terminal of the sixth three-position four-way valve is communicated with the second manifold 3023, the P terminal of the sixth three-position four-way valve is communicated with the outlet of the first reservoir tank 301, the T terminal of the sixth three-position four-way valve is communicated with the inlet of the first reservoir tank 301, when the coil YA11 is de-energized and the coil YA12 is de-energized, the sixth three-position four-way valve is in a neutral position function, and the a terminal, the P terminal, the B terminal, and the T terminal of the sixth three-position four-way valve are all closed; when the coil YA11 is electrified and the coil YA12 is not electrified, the sixth three-position four-way valve is positioned at the left position, the end A of the sixth three-position four-way valve is communicated with the end P, and the end B of the sixth three-position four-way valve is communicated with the end T; when the coil YA11 is powered off and the coil YA12 is powered on, the sixth three-position four-way valve is positioned at the right position, the A end, the B end and the T end of the sixth three-position four-way valve are communicated, and the P end of the sixth three-position four-way valve is closed.

In order to realize both the temperature increase of the inner container 100 and the temperature decrease of the inner container 100 through one storage box, in some embodiments of the present application, the steaming and baking device further includes a reversing valve 311, and the reversing valve 311 is used for guiding the refrigerant discharged by the compressor 201 into the first heat exchanger 202 or the second heat exchanger 204, so that the steaming and baking device can realize the temperature decrease and temperature increase of the inner container 100 by arranging one storage box. When the temperature of the inner container 100 is raised, the high-temperature and high-pressure refrigerant discharged from the compressor 201 is introduced into the first heat exchanger 202 through the reversing valve 311 to exchange heat with the first reservoir tank 301, so as to heat the heat exchange medium in the first reservoir tank 301, thereby heating the inner container 100. When the inner container 100 is cooled, the high-temperature and high-pressure refrigerant discharged from the compressor 201 is guided into the second heat exchanger 204 through the reversing valve 311 to be condensed, the condensed refrigerant is throttled and expanded through the throttling device 203, the expanded refrigerant flows into the first heat exchanger 202 to be evaporated and absorb heat, and the heat of the heat exchange medium in the first storage box 301 is absorbed, so that the temperature of the heat exchange medium in the first storage box 301 is reduced, and the inner container 100 is cooled.

Referring to fig. 17, the direction switching valve 311 is a four-way valve having an E terminal, a C terminal, a D terminal, and an S terminal, and a coil YA13 and a coil YA14, wherein when the coil YA13 is energized and the coil YA14 is de-energized, the four-way valve is in a left position function, the E terminal and the D terminal of the four-way valve are communicated, and the C terminal and the S terminal of the four-way valve are communicated, so as to guide the high-temperature and high-pressure refrigerant discharged from the compressor 201 into the first heat exchanger 202; when the coil YA13 is de-energized and the coil YA14 is energized, the four-way valve is in the right position function, the C end and the D end of the four-way valve are communicated, and the E end and the S end of the four-way valve are communicated, so that the high-temperature and high-pressure refrigerant discharged by the compressor 201 is guided into the second heat exchanger 204.

EXAMPLE five

In the fifth embodiment, on the basis of the technical solution including the reversing valve 311, the fifth connection device 312 is added, so that the heat exchange medium in the pipe between the air pump 304 and the fifth connection device can be exhausted.

Referring to fig. 18, the steaming and roasting apparatus further includes a fifth connecting device 312, wherein the fifth connecting device 312 is a seventh three-position four-way valve, the seventh three-position four-way valve has an a end, a B end, a P end and a T end, and a coil YA15 and a coil YA16, the a end of the seventh three-position four-way valve is communicated with the first manifold 3022, the B end of the seventh three-position four-way valve is communicated with the second manifold 3023, the P end of the seventh three-position four-way valve is communicated with the outlet of the first storage box 301, the T end of the seventh three-position four-way valve is communicated with the inlet of the first storage box 301, when the coil YA15 is de-energized and the coil YA16 is de-energized, the seventh three-position four-way valve is in a middle position function, and the a, P, B and T ends of the seventh three-position four-way valve are all closed; when the coil YA15 is electrified and the coil YA16 is not electrified, the seventh three-position four-way valve is positioned at the left position, the A end and the P end of the seventh three-position four-way valve are communicated, and the B end and the T end of the seventh three-position four-way valve are communicated; when the coil YA15 is powered off and the coil YA16 is powered on, the seventh three-position four-way valve is positioned at the right position, the A end, the B end and the T end of the seventh three-position four-way valve are communicated, and the P end of the seventh three-position four-way valve is closed.

The operation states of the components in the steaming and baking apparatus in the fifth technical solution provided by the above embodiment under different working conditions will be described in more detail with reference to table 5, where "+" in table 5 indicates power on and "-" in table 5 indicates power off.

TABLE 5 table of the fifth embodiment

YA13

YA14

YA15

YA16

First circulating pump

Air pump

Working conditions

+

-

+

-

+

-

Operating mode 21

-

+

-

+

Operating mode 22

-

+

-

+

-

Operating mode 23

-

+

-

+

Operating condition 24

Working condition 21: if the steaming and roasting equipment is in the working mode, that is, the temperature of the liner 100 needs to be raised at this time, the controller controls the first circulating pump 303 to be turned on, and controls the coil YA13 to be powered and the coil YA15 to be powered, so that the high-temperature heat exchange medium in the first storage box 301 enters the heat exchange branch pipe 3021 from the first main pipe 3022, and is discharged from the second main pipe 3023 after the heat exchange medium in the heat exchange branch pipe 3021 and exchanges heat with the liner 100.

Working condition 22: if the steaming and baking device is in the working mode and the maximum limit temperature value T of the heat exchange medium in the third heat exchanger 302 is higher than the preset limit temperature value T_rs' less than the temperature T inside the liner 100, i.e., indicating that the heat exchange medium cannot be extracted from the liner 100And heat supply, at the moment, the controller controls the first circulating pump 303 to be switched off, controls the coil YA16 to be electrified, controls the air pump 304 to be switched on, and discharges the high-temperature heat exchange medium in the third heat exchanger 302 from the second header pipe 3023.

Working condition 23: if the steaming and roasting equipment exits the working mode, the coil YA14 of the controller is powered, the coil YA15 of the controller is powered, the first circulating pump 303 is controlled to be powered, the low-temperature heat exchange medium in the first storage box 301 enters the heat exchange branch pipe 3021 from the first main pipe 3022, and is discharged from the second main pipe 3023 after heat exchange with the liner 100 in the heat exchange branch pipe 3021.

Working condition 24: if the steaming and baking device exits the operating mode and the temperature T inside the inner container 100 is less than the preset cooling temperature T', the controller controls the first circulating pump 303 to lose power, the air pump 304 to be powered, and the coil YA16 to be powered, so that the low-temperature heat exchange medium in the third heat exchanger 302 is discharged from the second header pipe 3023.

Referring to fig. 19 to 20, since the heat exchange medium in the first storage tank 301 is heated by the first heat exchanger 202, the temperature of the heat exchange medium is limited, and the operation mode of the heat exchange assembly 300 is divided into two modes, i.e., a first operation mode and a second operation mode, according to the maximum limit temperature value of the heat exchange medium and the preset temperature value when the steaming and baking apparatus is in the operation mode.

The specific working process of the heat exchange assembly 300 is as follows: when the steaming and baking equipment is in a working mode, the compressor 201, the heating element and the first circulating pump 303 are controlled to be started, the coil YA13 is controlled to be powered on, the coil YA15 is controlled to be powered on, meanwhile, the controller can obtain the current temperature T in the inner container 100 detected by the second temperature detection module, and the highest limit temperature value T of the heat exchange medium is used_rs' and a preset temperature value T of the steaming and baking equipment_gz' make a comparison to determine the operating mode of the heat exchange assembly 300.

When the heat exchange assembly 300 is in the first working mode, comparing the temperature T inside the inner container 100 with the maximum limit temperature value T of the heat exchange medium_rs' size, when T.gtoreq.T_rsWhen the heat exchanger is used, the controller controls the first circulating pump 303 and the compressor 201 to be turned off, controls the air pump 304 to be turned on, controls the coil YA16 to be electrified, and controls the air pump 304 to be turned off after the heat exchange medium in the third heat exchanger 302 is emptiedControl coil YA16 was de-energized. In addition, after the step of controlling the air pump 304 to be turned on and the coil YA16 to be powered, the method further comprises the following steps: comparing the temperature T inside the inner container 100 with a preset temperature value T_gz', when T is more than or equal to T_gzIf the air pump 304 is not turned off, it indicates that the heat exchange medium in the third heat exchanger 302 is not emptied, and continues to wait for the turning off of the air pump; if the air pump 304 is turned off, it indicates that the steaming and baking device is finished.

When the heat exchange assembly 300 is in the second working mode, comparing the temperature T inside the inner container 100 with the preset temperature value T_gz' size, when T.gtoreq.T_gzWhen the heat exchanger is in use, the controller controls the first circulating pump 303, the compressor 201 and the heating element to be turned off, controls the air pump 304 to be turned on, controls the coil YA16 to be powered on, controls the air pump 304 to be turned off after the heat exchange medium in the third heat exchanger 302 is emptied, controls the coil YA16 to be powered off, and ends the work.

When the steaming and baking equipment exits the working mode, the compressor 201 and the first circulating pump 303 are controlled to be started, the coil YA14 is powered on, the coil YA15 is powered on, meanwhile, the controller can obtain the current temperature T inside the inner container 100 detected by the second temperature detection module, the current temperature T inside the inner container 100 is compared with the preset cooling temperature T ', when the temperature T is less than or equal to T', the compressor 201 and the second circulating pump 306 are controlled to be started, the coil YA16 is controlled to be powered on, after a heat exchange medium in the third heat exchanger 302 is emptied, the air pump 304 is controlled to be started, the coil YA16 is powered off, and cooling is finished.

Or, referring to fig. 21, the steaming and roasting equipment further includes a fifth connecting device 312, the fifth connecting device 312 is an eighth three-position four-way valve, the eighth three-position four-way valve has an a end, a B end, a P end and a T end, as well as a coil YA15 and a coil YA16, the a end of the eighth three-position four-way valve is communicated with the first header pipe 3022, the B end of the eighth three-position four-way valve is communicated with the second header pipe 3023, the P end of the eighth three-position four-way valve is communicated with the outlet of the first storage box 301, the T end of the eighth three-position four-way valve is communicated with the inlet of the first storage box 301, when the coil YA15 is de-energized and the coil YA16 is de-energized, the eighth three-position four-way valve is in a middle position function, and the a end, the P end, the B end and the T end of the eighth three-position four-way valve are all closed; when the coil YA15 is electrified and the coil YA16 is not electrified, the eighth three-position four-way valve is positioned at the left position, the end A of the eighth three-position four-way valve is communicated with the end P, and the end B of the eighth three-position four-way valve is communicated with the end T; when the coil YA15 is powered off and the coil YA16 is powered on, the eighth three-position four-way valve is positioned on the right computer, the end A of the eighth three-position four-way valve is communicated with the end T, and the end B of the eighth three-position four-way valve is communicated with the end P.

In particular use, for embodiments where the first manifold 3022 is disposed above the liner 100 and the second manifold 3023 is disposed below the liner 100. When the inner container 100 is heated, the four-way valve is controlled to be in the left position function, and the eighth three-way four-way valve is controlled to be in the left position function, so that the high-temperature heat exchange medium flows in from the first main pipe 3022, passes through the plurality of heat exchange branch pipes 3021, and is discharged from the second main pipe 3023, that is, the flow direction of the high-temperature heat exchange medium is from top to bottom. When the inner container 100 is cooled, the four-way valve is controlled to be in a right position function, and the eighth three-position four-way valve is controlled to be in a right position function, so that the low-temperature heat exchange medium flows in from the second header pipe 3023, passes through the plurality of heat exchange branch pipes 3021, and is discharged from the first header pipe 3022, that is, the flow direction of the low-temperature heat exchange medium is from bottom to top, and therefore the heating effect and the cooling effect of the third heat exchanger 302 on the inner container 100 are good.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A steaming and baking apparatus, comprising:

a housing;

the inner container is arranged inside the shell;

the heating element can heat the inner container;

the refrigerant circulating system comprises a compressor, and a first heat exchanger, a throttling device and a second heat exchanger are sequentially connected between an exhaust port of the compressor and an air suction port of the compressor;

the heat exchange medium in the heat exchange assembly can exchange heat with the inner container and the first heat exchanger, and is water or heat conduction oil;

the heat exchange assembly comprises:

a first reservoir tank, at least a portion of the first heat exchanger being disposed within the first reservoir tank, the heat exchange medium being stored within the first reservoir tank;

the third heat exchanger is a heat exchange tube;

the heat exchange tube includes:

the heat exchange branch pipes are wound on the outer side of the inner container;

a first manifold in communication with an outlet of the first reservoir tank;

the second main pipe is communicated with the inlet of the first storage box, and the plurality of heat exchange branch pipes are arranged between the first main pipe and the second main pipe in parallel;

the steaming and baking device further comprises:

first connecting means for connecting or disconnecting the third heat exchanger to the first reservoir tank;

the first connecting device is a first three-position four-way valve, the first three-position four-way valve is provided with an A end, a B end, a P end, a T end, a coil YA1 and a coil YA2, the A end of the first three-position four-way valve is communicated with the first main pipe, the P end of the first three-position four-way valve is communicated with the outlet of the first storage box, the B end of the first three-position four-way valve is communicated with the second main pipe, and the T end of the first three-position four-way valve is communicated with the inlet of the first storage box;

when the coil YA1 and the coil YA2 are both de-energized, the A end, the B end, the P end and the T end of the first three-position four-way valve are all closed; when the coil YA1 is electrified and the coil YA2 is not electrified, the A end and the P end of the first three-position four-way valve are communicated, and the B end and the T end of the first three-position four-way valve are communicated; when the coil YA1 is powered off and the coil YA2 is powered on, the P end of the first three-position four-way valve is closed, and the A end, the B end and the T end of the first three-position four-way valve are communicated.

2. The steaming and baking apparatus as claimed in claim 1, wherein the heat exchange pipe is provided on both side walls and a rear side wall of the inner container which are parallel to each other.

3. The steaming and baking apparatus of claim 2, wherein the first manifold is disposed above the inner container and the second manifold is disposed below the inner container.

4. The steaming and baking apparatus according to claim 2 or 3, wherein the heat exchange assembly further comprises:

the first circulating pump is arranged on a connecting pipeline between the third heat exchanger and the first storage box;

an air pump connected to a connection pipe between the first circulation pump and the third heat exchanger.

5. The steaming and baking apparatus of claim 4, wherein the heat exchange assembly further comprises:

and at least one part of the second heat exchanger is arranged in the second storage box, and the heat exchange medium is stored in the second storage box.

6. The steaming and baking apparatus of claim 5, wherein the outlet of the second reservoir tank is in communication with the second manifold, and the inlet of the second reservoir tank is in communication with the first manifold.

7. The steaming and baking apparatus according to claim 5 or 6, wherein the heat exchange assembly further comprises:

the second circulating pump is arranged on a connecting pipeline between the third heat exchanger and the second storage box, and the air pump is further connected to one end, far away from the second storage box, of the second circulating pump.

8. The steaming and baking apparatus according to claim 7, further comprising:

the first temperature detection module is used for detecting the temperature of the heat exchange medium in the third heat exchanger;

the second temperature detection module is used for detecting the temperature inside the inner container;

the controller is used for controlling the compressor, the first circulating pump and the air pump to be turned on or turned off according to the temperature of the heat exchange medium in the third heat exchanger detected by the first temperature detection module and the temperature inside the inner container detected by the second temperature detection module when the steaming and baking equipment is in a working mode;

the controller is further used for controlling the compressor, the second circulating pump and the air pump to be turned on or turned off according to the temperature value inside the inner container detected by the second temperature detection module when the steaming and baking equipment exits the working mode.