Composite food baking equipment based on heat pump

Abstract

The utility model relates to the technical field of food baking, in particular to composite food baking equipment based on a heat pump, which comprises a baking box body, a heating part, a circulating pipeline, a fan, a temperature sensor and a controller, the baking box body is provided with a baking chamber, the heating part comprises a heating element and a heat pump, the heating element and the heat pump are both mounted on the baking box body, and the circulating pipeline is communicated with the circulating pipeline. The circulating pipeline comprises a first pipeline and a second pipeline, the heating element is installed in the first pipeline, the heat pump is installed at the position, opposite to the second pipeline, of the baking box body, the fan is installed in the first pipeline, and the temperature sensor is installed on the side wall of the baking chamber. According to the food baking device, the temperature in the baking chamber is monitored in real time through the temperature sensor, when the temperature in the baking chamber is low, the heat pump is adopted for heating gas, when the temperature in the baking chamber is high, the heating element is adopted for heating gas, the energy consumption efficiency of the food baking device can be improved, and consumption of food baking energy is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to food baking technical field especially a composite food baking equipment based on heat pump. BACKGROUND

[0002] In the baking equipment with hot air as baking medium, the hot air temperature is increased from normal temperature to the set temperature of food baking, which is a slow heating process. For food, the heating process of hot air is also the process of food gradually completing baking. In the traditional hot air heating, fuel combustion or electric energy is usually used.

[0003] 1. Fuel combustion converts chemical energy into heat energy, and heats and increases the temperature of air through heat exchange equipment.

[0004] 2. Electric energy is used to convert electric energy into heat energy, and heats and increases the temperature of air through electric heating pipe heating element.

[0005] In these heating sources, the ratio of input energy to effective utilization energy (i.e. energy utilization efficiency or energy efficiency) is less than 1.

[0006] Heat pump is a kind of high-efficiency energy-saving equipment, when used for heating air, it can obtain multiple heat energy by consuming one part of energy (usually electric energy), and has high energy efficiency. Compared with fuel combustion and direct heating of air by electric energy, heat pump has good energy-saving characteristics. However, in the current heat pump technology, the heated air can only be heated to 80℃, which cannot directly meet the highest temperature required by food baking. UTILITY MODEL CONTENTS

[0007] In view of the above-mentioned shortcomings in the prior art, the present application provides a composite food baking equipment based on heat pump, which can improve the energy efficiency of the food baking device and save the consumption of food baking energy by improving the heating method of the food baking device.

[0008] The technical scheme adopted by the utility model is as follows:

[0009] The utility model provides a kind of composite food baking equipment based on heat pump, including: baking box, heating part, circulating pipeline, fan, temperature sensor and controller, the baking box is opened with baking chamber, the baking chamber is used for food baking, the heating part includes: heating element and heat pump, the heating element, the heat pump are installed on the baking box, and the heating element, the heat pump are used to heat the gas that enters inside the baking chamber, to form heat source gas, the circulating pipeline includes: first pipeline and second pipeline, the heating element is installed in the first pipeline, the heat pump is installed at the position of the baking box relative to the second pipeline, one end of the first pipeline is communicated with one end of the second pipeline, the other end of the first pipeline is communicated with the outlet end of the baking chamber, the other end of the second pipeline is communicated with the import end of the baking chamber, the fan is installed in the first pipeline, and the fan is used to drive gas circulation flow in the first pipeline, the second pipeline and the baking chamber, the temperature sensor is installed on the side wall of the baking chamber, and the heating element, the heat pump, the fan and the temperature sensor are connected with the controller.

[0010] Therefore, the temperature in the baking chamber is monitored in real time by the temperature sensor, compared with the existing heating mode by heat pump, the mode is simple in structure and convenient to operate, when the temperature in the baking chamber is lower, the gas is heated by heat pump, when the temperature in the baking chamber is higher, the gas is heated by heating element, the energy efficiency of the food baking device can be improved, and the consumption of food baking energy can be saved.

[0011] Further, the second pipeline is a single channel.

[0012] Further, the second pipeline includes: first sub-pipeline and second sub-pipeline, one end of the first sub-pipeline and the second sub-pipeline is communicated with the first pipeline, the other end of the first sub-pipeline and the second sub-pipeline is communicated with the import end of the baking chamber, and the heat pump is installed at the position of the baking box relative to the first sub-pipeline.

[0013] Further, the first sub-pipeline is connected with a first air valve, and the second sub-pipeline is connected with a second air valve, and the first air valve and the second air valve are connected with the controller. Therefore, when the temperature in the baking chamber is higher, the first air valve is closed, and the gas is heated by the heating element, which can prevent the dust of hot air from depositing on the surface of the heat pump, thereby prolonging the service life of the heat pump, and reducing the resistance loss of hot air in the high-temperature heating stage, thereby saving the energy consumption of the fan output.

[0014] Further, the circulating pipeline further comprises: a plurality of third pipelines, the plurality of third pipelines are respectively arranged on the top, the bottom and the side wall of the baking chamber, one end of the second pipeline is communicated with one end of the third pipeline, and the other end of the third pipeline is communicated with the inlet end of the baking chamber.

[0015] Further, the other end of the first sub-pipeline and the other end of the second sub-pipeline are both communicated with one end of the third pipeline.

[0016] Further, the heating element comprises: an electric heating wire.

[0017] Further, the heating element comprises: a combustion machine and a flue gas heat exchange device, the combustion machine and the flue gas heat exchange device are both arranged in the first pipeline, and the combustion machine is connected with the flue gas heat exchange device.

[0018] Further, the heat pump comprises: an evaporator, a compressor, a throttling element and a condenser, the evaporator, the throttling element, the condenser and the compressor are sequentially connected, and the condenser is arranged in the first sub-pipeline.

[0019] Further, the baking box body is provided with a box door.

[0020] The beneficial effects of the utility model are as follows:

[0021] The utility model discloses a temperature sensor real-time monitoring the temperature in the baking chamber, compared with the prior art directly through the heat pump heating mode, this mode simple structure, convenient operation can according to the height of heat source gas temperature, the flexible selection heating heat source mode, thereby can improve the energy efficiency of food baking device, save food baking energy consumption.

[0022] The utility model also includes the following advantages:

[0023] 1, the utility model discloses a heat pump and heating element compound use, and the device structure is simple, only needs to add heat pump condenser in the air duct of traditional equipment, and the other components of heat pump can be modularly installed on the outside of the device, and the structure is compact, reasonable.

[0024] 2, the utility model discloses when the temperature in the baking chamber is higher, closes the first air valve, and heating element heating gas can prevent the dust deposition of hot air on the surface of condenser, to prolong the service life of condenser, simultaneously, reduce the hot air resistance loss of high-temperature heating stage, save the energy consumption of fan output.

[0025] 3、The utility model discloses through a plurality of third pipelines, can make the heat source gas from the each direction of baking chamber into the baking chamber to improve the efficiency of food baking. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 Structure diagram of the heat pump based composite food baking equipment of example 1 is shown in the figure.

[0027] Figure 2 Structure diagram of the heat pump of the utility model is shown in the figure.

[0028] Figure 3 Control block diagram of the heat pump based composite food baking equipment of example 1 is shown in the figure.

[0029] Figure 4 Structure diagram of the heat pump based composite food baking equipment of example 2 is shown in the figure.

[0030] Figure 5 Control block diagram of the heat pump based composite food baking equipment of example 2 is shown in the figure.

[0031] Figure 6 Structure diagram of the heat pump based composite food baking equipment of example 3 is shown in the figure.

[0032] Wherein: 1, baking box body;

[0033] 101, baking chamber;

[0034] 2, heating part;

[0035] 201, heating element; 2011, combustion engine; 2012, flue gas heat exchange equipment; 202, heat pump; 2021, evaporator; 2022, compressor; 2023, throttling element; 2024, condenser;

[0036] 3, circulating pipeline;

[0037] 301, first pipeline; 302, second pipeline; 3021, first sub-pipeline; 3022, second sub-pipeline; 3023, first air valve; 3024, second air valve; 303, third pipeline;

[0038] 4, fan;

[0039] 5, temperature sensor;

[0040] 6, controller. DETAILED DESCRIPTION

[0041] The specific implementation of the utility model will be described below in combination with the drawings.

[0042] Example one:

[0043] As shown in Figures 1 to 3 A composite food baking device based on heat pump, comprising: a baking box 1, a heating part 2, a circulating pipeline 3, a fan 4, a temperature sensor 5 and a controller 6, the baking box 1 is provided with a baking chamber 101, the baking chamber 101 is used for food baking, the heating part 2 comprises: a heating element 201 and a heat pump 202, the heating element 201 and the heat pump 202 are both installed on the baking box 1, and the heating element 201 and the heat pump 202 are both used for heating the gas entering the inside of the baking chamber 101 to form a heat source gas, the circulating pipeline 3 comprises: a first pipeline 301 and a second pipeline 302, the heating element 201 is installed in the first pipeline 301, the heat pump 202 is installed at a position of the baking box 1 opposite to the second pipeline 302, one end of the first pipeline 301 is communicated with one end of the second pipeline 302, the other end of the first pipeline 301 is communicated with an outlet end of the baking chamber 101, the other end of the second pipeline 302 is communicated with an inlet end of the baking chamber 101, the fan 4 is installed in the first pipeline 301, the fan 4 is used for driving the gas to circulate and flow in the first pipeline 301, the second pipeline 302 and the baking chamber 101, the temperature sensor 5 is installed on the side wall of the baking chamber 101, and the heating element 201, the heat pump 202, the fan 4 and the temperature sensor 5 are connected with the controller 6. Thus, the temperature in the baking chamber 101 is monitored in real time by the temperature sensor 5, compared with the existing heating mode by the heat pump 202, the mode has simple structure and is convenient to operate, when the temperature in the baking chamber 101 is lower (i.e. the temperature in the baking chamber 101 is ≤80℃), the heat pump 202 is used to heat the gas, when the temperature in the baking chamber 101 is higher (i.e. the temperature in the baking chamber 101 is >80℃), the heating element 201 is used to heat the gas, the energy efficiency of the food baking device can be improved, and the consumption of food baking energy can be saved.

[0044] In other words, in the low-temperature baking occasion, the heat pump 202 is fully utilized to bake food, which has more energy-saving advantages than the traditional baking device.

[0045] Specifically, the temperature in the baking chamber 101 is monitored in real time by the temperature sensor 5, and the switching of the heat pump 202 and the heating element 201 is controlled by the controller 6, so as to control the operation of the whole food baking device.

[0046] For example, the fan 4 is a variable frequency fan 4, the flow thereof can be selected according to the demand of the food to be baked, the head thereof is determined according to the maximum resistance loss of the circulating pipeline 3 when the maximum flow, and the flow of the fan 4 is adjusted to realize different flows of the fan 4 when different types of food are baked, so as to save the energy consumption of the fan 4.

[0047] In the embodiment, the second pipeline 302 is a single channel.

[0048] In the embodiment, the circulating pipeline 3 further comprises a plurality of third pipelines 303, which are respectively arranged on the top, bottom and side wall of the baking chamber 101, one end of the second pipeline 302 is connected with one end of the third pipeline 303, and the other end of the third pipeline 303 is connected with the inlet end of the baking chamber 101. Thus, the hot source gas can enter the baking chamber 101 from all directions through the plurality of third pipelines 303, so as to improve the efficiency of food baking.

[0049] In the embodiment, the heating element 201 is an electric heating wire. Specifically, the heating element 201 can also be an electric heating tube or other electric heating element; the air is heated by converting electric energy into heat energy.

[0050] In the embodiment, the heat pump 202 comprises an evaporator 2021, a compressor 2022, a throttling element 2023 and a condenser 2024, which are connected in sequence, and the condenser 2024 is arranged in the second pipeline 302. Specifically, the air is heated by the condenser 2024, and the operating frequency of the compressor 2022 is adjusted according to the required heating rate of the food to be baked; the heat pump 202 consumes part of the electric energy, converts the energy absorbed by the evaporator 2021 from the air and the electric energy consumed by the compressor 2022 into condensation heat released by the condenser 2024, and heats the air in the circulating air duct.

[0051] In the embodiment, the baking box 1 is provided with a box door.

[0052] The process of food baking in the embodiment is as follows: first, open the box door, put the food to be baked into the baking chamber 101, and then close the box door; then, start the heat pump 202 and the fan 4, heat the air by the heat pump 202 to form the hot source gas, and make the hot source gas circulate in the first pipeline 301, the second pipeline 302, the third pipeline 303 and the baking chamber 101 by the fan 4, bake the food by the flowing hot source gas, monitor the temperature in the baking chamber 101 by the temperature sensor 5 in real time, and continue to heat the gas by the heat pump 202 if the temperature in the baking chamber 101 is ≤80℃; finally, if the temperature in the baking chamber 101 is >80℃, turn off the heat pump 202, start the heating element 201, heat by the heating element 201 to form the hot source gas, and make the hot source gas circulate in the first pipeline 301, the second pipeline 302, the third pipeline 303 and the baking chamber 101 by the fan 4, bake the food by the flowing hot source gas, turn off the heating element 201 after the food is baked, and open the box door, so as to complete the baking of the food.

[0053] Embodiment two:

[0054] As Figures 4 to 5The difference between the embodiment one is that the second pipeline 302 includes: a first sub-pipeline 3021 and a second sub-pipeline 3022, one end of the first sub-pipeline 3021 and the second sub-pipeline 3022 are communicated with the first pipeline 301, the other end of the first sub-pipeline 3021 and the second sub-pipeline 3022 are communicated with the inlet end of the baking chamber 101, the heat pump 202 is installed at the position of the baking box 1 opposite to the first sub-pipeline 3021; the first sub-pipeline 3021 is in series with the first air valve 3023, the second sub-pipeline 3022 is in series with the second air valve 3024, the first air valve 3023 and the second air valve 3024 are connected with the controller 6; the other end of the first sub-pipeline 3021 and the second sub-pipeline 3022 are communicated with one end of the third pipeline 303; the condenser 2024 is located in the first sub-pipeline 3021. Thus, when the temperature in the baking chamber 101 is high, the first air valve 3023 is closed, the heating element 201 is used to heat the gas, which can prevent the dust of the hot air from depositing on the surface of the condenser 2024, so as to prolong the service life of the condenser 2024, at the same time, the heat loss of the hot air in the high-temperature heating stage is reduced, and the energy consumption of the fan 4 output is saved.

[0055] The process of food baking in the embodiment is as follows: first, open the box door, put the food to be baked into the baking chamber 101, and then close the box door; then, start the heat pump 202 and the fan 4, and open the first air valve 3023 (the second air valve 3024 is in the closed state), heat the heat source gas by the heat pump 202, and make the heat source gas flow in the first pipeline 301, the first sub-pipeline 3021, the third pipeline 303 and the baking chamber 101 by the fan 4, use the flowing heat source gas to bake the food, and monitor the temperature in the baking chamber 101 by the temperature sensor 5, if the temperature in the baking chamber 101 is ≤80℃, continue to heat the gas by the heat pump 202; finally, if the temperature in the baking chamber 101 is >80℃, close the heat pump 202 and the first air valve 3023, start the heating element 201 and the second air valve 3024, heat the heat source gas by the heating element 201, and make the heat source gas flow in the first pipeline 301, the second sub-pipeline 3022, the third pipeline 303 and the baking chamber 101 by the fan 4, use the flowing heat source gas to bake the food, after the food is baked, close the heating element 201, and open the box door, the baking of the food is completed.

[0056] Embodiment three:

[0057] As Figure 6Different from the embodiment one, the heating element 201 comprises a combustion machine 2011 and a flue gas heat exchange device 2012, the combustion machine 2011 and the flue gas heat exchange device 2012 are located in the first pipeline 301, and the combustion machine 2011 is connected with the flue gas heat exchange device 2012.

[0058] In summary, the temperature sensor 5 is used for monitoring the temperature in the baking chamber 101 in real time, compared with the existing heating mode through the heat pump 202, the mode has the advantages of simple structure and convenient operation, can flexibly select the heating mode of the heat source according to the temperature of the heat source, thereby improving the energy efficiency of the food baking device and saving the consumption of food baking energy.

[0059] The above description is an explanation of the utility model, not a limitation of the utility model, the range defined by the utility model is referred to the claims, and any form of modification can be made within the protection range of the utility model.

Claims

1. A composite food baking equipment based on a heat pump, characterized in that, include: A baking box (1) is provided with a baking chamber (101) for food baking. Heating unit (2), the heating unit (2) includes: Heating element (201) and heat pump (202) are both installed on the baking chamber (1), and the heating element (201) and the heat pump (202) are both used to heat the gas entering the baking chamber (101) to form heat source gas; A circulation pipe (3), the circulation pipe (3) comprising: A first pipe (301) and a second pipe (302) are connected. The heating element (201) is installed in the first pipe (301). The heat pump (202) is installed in the baking chamber (1) at a position relative to the second pipe (302). One end of the first pipe (301) is connected to one end of the second pipe (302). The other end of the first pipe (301) is connected to the outlet end of the baking chamber (101). The other end of the second pipe (302) is connected to the inlet end of the baking chamber (101). A fan (4) is installed in the first pipe (301) and is used to drive gas to circulate in the first pipe (301), the second pipe (302) and the baking chamber (101); Temperature sensor (5) and controller (6), wherein the temperature sensor (5) is installed on the side wall of the baking chamber (101), and the heating element (201), the heat pump (202), the fan (4) and the temperature sensor (5) are all connected to the controller (6).

2. The composite food baking equipment based on a heat pump as described in claim 1, characterized in that: The second pipe (302) is a single channel.

3. The composite food baking equipment based on a heat pump as described in claim 1, characterized in that: The second conduit (302) includes: The first sub-pipe (3021) and the second sub-pipe (3022) are connected at one end to the first pipe (301) and at the other end to the inlet of the baking chamber (101). The heat pump (202) is installed on the baking chamber (1) at a position relative to the first sub-pipe (3021).

4. The composite food baking equipment based on a heat pump as described in claim 3, characterized in that: The first sub-pipe (3021) is connected in series with a first air valve (3023), and the second sub-pipe (3022) is connected in series with a second air valve (3024). Both the first air valve (3023) and the second air valve (3024) are connected to the controller (6).

5. The composite food baking equipment based on a heat pump as described in claim 4, characterized in that: The circulation pipe (3) also includes: Multiple third pipes (303) are located on the top, bottom and side wall of the baking chamber (101), respectively. The other end of the second pipe (302) is connected to one end of the third pipe (303), and the other end of the third pipe (303) is connected to the inlet end of the baking chamber (101).

6. The composite food baking equipment based on a heat pump as described in claim 5, characterized in that: The other ends of the first sub-pipe (3021) and the second sub-pipe (3022) are connected to one end of the third pipe (303).

7. The composite food baking equipment based on a heat pump as described in claim 1, characterized in that: The heating element (201) has an electric heating wire.

8. The composite food baking equipment based on a heat pump as described in claim 1, characterized in that: The heating element (201) includes: A burner (2011) and a flue gas heat exchanger (2012) are provided, both of which are located in the first pipe (301), and the burner (2011) is connected to the flue gas heat exchanger (2012).

9. The composite food baking equipment based on a heat pump as described in claim 3, characterized in that: The heat pump (202) includes: An evaporator (2021), a compressor (2022), a throttling element (2023), and a condenser (2024) are connected in sequence, and the condenser (2024) is located inside the first sub-pipe (3021).

10. The composite food baking equipment based on a heat pump as described in claim 1, characterized in that: The baking oven (1) is equipped with a door.

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