Heating device for drying oven of coating machine

Abstract

The utility model relates to a heating device for a coating machine oven, which comprises the coating machine oven, an air inlet pipe and an air outlet pipe are arranged at two ends of the coating machine oven, the air inlet pipe and the air outlet pipe are arranged in a crossed mode, and a sensible heat exchanger is arranged at the crossed position of the air inlet pipe and the air outlet pipe. An auxiliary heater is arranged at the position, close to the coating machine drying oven, of the air inlet pipe, an energy-saving heating part is arranged at the position, on the coating machine drying oven, of the air inlet pipe, and the auxiliary heater is located between the coating machine drying oven and the energy-saving heating part. And the energy-saving heating part is used for heating the air which does not pass through the auxiliary heater. The utility model relates to the technical field of heating equipment. The device has the advantages that the purpose of recycling heat in high-temperature gas is achieved, energy consumption is reduced, and meanwhile waste of heat resources is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of heating equipment, and in particular to a heating device for a coating machine oven. Background Technology

[0002] Coating machines are mainly used for surface coating processes of films, paper, etc. This machine coats a roll of substrate with a layer of adhesive, paint or ink with a specific function, and then dries it before cutting it into sheets or rewinding it.

[0003] Most existing coating machines use electric heating directly.

[0004] Electric heating consumes a lot of energy, and the high-temperature gas cannot be recovered and is directly discharged, resulting in a serious waste of resources. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a heating device for the oven of a coating machine, which can realize the heat recycling in high-temperature gas, reduce energy consumption and avoid the waste of heat resources.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A heating device for a coating machine oven includes a coating machine oven, wherein both ends of the coating machine oven are provided with an air inlet pipe and an air outlet pipe, the air inlet pipe and the air outlet pipe are arranged to cross each other, and a sensible heat exchanger is provided at the intersection of the air inlet pipe and the air outlet pipe. An auxiliary heater is provided near the coating machine oven on the air inlet pipe, and an energy-saving heating element is provided at the air inlet pipe on the upper part of the coating machine oven. The auxiliary heater is located between the coating machine oven and the energy-saving heating element.

[0008] The energy-saving heating unit heats the air that has not passed through the auxiliary heater.

[0009] In a preferred embodiment, the present invention can be further configured such that the energy-saving heating section includes a DC frequency converter heating component and an ultra-high temperature heating component.

[0010] In a preferred embodiment, the present invention can be further configured as follows: the DC inverter heating assembly includes a DC inverter heat pump condenser, the DC inverter heat pump condenser is disposed on the air inlet pipe, and the DC inverter heat pump condenser is located between the auxiliary heater and the sensible heat exchanger;

[0011] A DC inverter heat pump evaporator is installed on the air outlet duct, and the sensible heat exchanger is located between the DC inverter heat pump evaporator and the coating machine oven;

[0012] A first pipe is provided between the inlet end of the DC inverter heat pump condenser and the outlet end of the DC inverter heat pump evaporator, and a DC inverter compressor and a first gas-liquid separator are provided on the first pipe.

[0013] A second pipe is provided between the outlet end of the DC inverter heat pump condenser and the inlet end of the DC inverter heat pump evaporator. A first liquid receiver, a first drying filter and a first electronic expansion valve are sequentially provided on the second pipe. The first liquid receiver is closest to the DC inverter heat pump condenser.

[0014] The DC inverter heat pump condenser, the first liquid receiver, the first dryer filter, the first electronic expansion valve, the DC inverter heat pump evaporator, the first gas-liquid separator, and the DC inverter compressor together form a circulation loop.

[0015] In a preferred embodiment, the present invention can be further configured such that: the ultra-high temperature heating component includes an ultra-high temperature heat pump condenser and an ultra-high temperature heat pump evaporator, the ultra-high temperature heat pump condenser is disposed on the air inlet pipe, and the ultra-high temperature heat pump evaporator is disposed on the air outlet pipe;

[0016] The ultra-high temperature heat pump condenser is disposed between the auxiliary heater and the sensible heat exchanger, and the sensible heat exchanger is located between the ultra-high temperature heat pump evaporator and the coating machine oven;

[0017] A third pipe is provided between the inlet end of the ultra-high temperature heat pump condenser and the outlet end of the ultra-high temperature heat pump evaporator. An ultra-high temperature heat pump compressor and a second gas-liquid separator are provided on the third pipe. The ultra-high temperature heat pump compressor is located between the second gas-liquid separator and the ultra-high temperature heat pump condenser.

[0018] A fourth pipe is provided between the outlet end of the ultra-high temperature heat pump condenser and the inlet end of the ultra-high temperature heat pump evaporator. A plate heat exchanger, a second dryer filter and a second electronic expansion valve are sequentially installed on the fourth pipe.

[0019] The ultra-high temperature heat pump condenser, the ultra-high temperature heat pump evaporator, the ultra-high temperature heat pump compressor, the second gas-liquid separator, the plate heat exchanger, the second dryer filter, and the second electronic expansion valve together form a circulation loop.

[0020] In a preferred embodiment, the present invention can be further configured such that: a fifth pipe is provided between the pipe between the plate heat exchanger and the second drying filter and the plate heat exchanger at a certain point, and a third electronic expansion valve is provided on the fifth pipe;

[0021] The plate heat exchanger is connected to the ultra-high temperature heat pump compressor via a pipeline.

[0022] The plate heat exchanger, the third electronic expansion valve, the ultra-high temperature heat pump compressor, and the ultra-high temperature heat pump condenser together form a circulation loop.

[0023] In summary, this utility model has at least one of the following beneficial technical effects:

[0024] 1. By setting up an energy-saving heating unit, the heating device of the coating machine uses electric heating as a supplement and energy-saving heating as the main method, and achieves the purpose of recycling heat in high-temperature gas, reducing energy consumption and avoiding waste of heat resources. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this embodiment.

[0026] In the diagram, 1. Coating machine oven; 11. Sensible heat exchanger; 12. Auxiliary heater; 2. DC inverter heating assembly; 3. Ultra-high temperature heating assembly; 21. DC inverter heat pump condenser; 22. DC inverter heat pump evaporator; 23. DC inverter compressor; 24. First gas-liquid separator; 25. First liquid receiver; 26. First drying filter; 27. First electronic expansion valve; 31. Ultra-high temperature heat pump condenser; 32. Ultra-high temperature heat pump evaporator; 33. Ultra-high temperature heat pump compressor; 34. Second gas-liquid separator; 35. Plate heat exchanger; 36. Second drying filter; 37. Second electronic expansion valve; 4. Third electronic expansion valve. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings.

[0028] Example:

[0029] Reference Figure 1 This utility model discloses a heating device for a coating machine oven 1, comprising a coating machine oven 1. Both ends of the coating machine oven 1 are provided with an air inlet pipe and an air outlet pipe. The air inlet pipe and the air outlet pipe are arranged to cross each other, and a sensible heat exchanger 11 is provided at the intersection of the air inlet pipe and the air outlet pipe. An air filter is provided at the air inlet pipe.

[0030] An auxiliary heater 12 is installed near the air inlet pipe of the coating machine oven 1. An energy-saving heating element is installed at the air inlet pipe of the coating machine oven 1, and the auxiliary heater 12 is located between the coating machine oven 1 and the energy-saving heating element.

[0031] The energy-saving heating unit heats the air that has not passed through the auxiliary heater 12.

[0032] The energy-saving heating section includes a DC inverter heating component 2 and an ultra-high temperature heating component 3.

[0033] The DC inverter heating assembly 2 includes a DC inverter heat pump condenser 21, which is mounted on the air inlet duct and located between the auxiliary heater 12 and the sensible heat exchanger 11. A DC inverter heat pump evaporator 22 is mounted on the air outlet duct, and the sensible heat exchanger 11 is located between the DC inverter heat pump evaporator 22 and the coating machine oven 1.

[0034] A first pipe is provided between the inlet end of the DC inverter heat pump condenser 21 and the outlet end of the DC inverter heat pump evaporator 22. A DC inverter compressor 23 and a first gas-liquid separator 24 are provided on the first pipe.

[0035] A second pipe is provided between the outlet end of the DC inverter heat pump condenser 21 and the inlet end of the DC inverter heat pump evaporator 22. A first liquid receiver 25, a first dryer filter 26 and a first electronic expansion valve 27 are sequentially provided on the second pipe. The first liquid receiver 25 is closest to the DC inverter heat pump condenser 21.

[0036] The DC inverter heat pump condenser 21, the first liquid receiver 25, the first dryer filter 26, the first electronic expansion valve 27, the DC inverter heat pump evaporator 22, the first gas-liquid separator 24, and the DC inverter compressor 23 together form a circulation loop.

[0037] The ultra-high temperature heating assembly 3 includes an ultra-high temperature heat pump condenser 31 and an ultra-high temperature heat pump evaporator 32. The ultra-high temperature heat pump condenser 31 is installed on the air inlet duct, and the ultra-high temperature heat pump evaporator 32 is installed on the air outlet duct. The ultra-high temperature heat pump condenser 31 is located between the auxiliary heater 12 and the sensible heat exchanger 11, and the sensible heat exchanger 11 is located between the ultra-high temperature heat pump evaporator 32 and the coating machine oven 1.

[0038] A third pipe is provided between the inlet end of the ultra-high temperature heat pump condenser 31 and the outlet end of the ultra-high temperature heat pump evaporator 32. An ultra-high temperature heat pump compressor 33 and a second gas-liquid separator 34 are provided on the third pipe. The ultra-high temperature heat pump compressor 33 is located between the second gas-liquid separator 34 and the ultra-high temperature heat pump condenser 31.

[0039] A fourth pipe is provided between the outlet end of the ultra-high temperature heat pump condenser 31 and the inlet end of the ultra-high temperature heat pump evaporator 32. A plate heat exchanger 35, a second dryer filter 36 and a second electronic expansion valve 37 are sequentially installed on the fourth pipe.

[0040] The ultra-high temperature heat pump condenser 31, the ultra-high temperature heat pump evaporator 32, the ultra-high temperature heat pump compressor 33, the second gas-liquid separator 34, the plate heat exchanger 35, the second dryer filter 36, and the second electronic expansion valve 37 together form a circulation loop.

[0041] A fifth pipe is installed between the plate heat exchanger 35 and the second dryer filter 36, and a third electronic expansion valve 4 is installed on the fifth pipe. The plate heat exchanger 35 is connected to the ultra-high temperature heat pump compressor 33 via a pipe. The plate heat exchanger 35, the third electronic expansion valve 4, the ultra-high temperature heat pump compressor 33, and the ultra-high temperature heat pump condenser 31 together form a circulation loop.

[0042] The implementation principle of the above embodiments is as follows:

[0043] This embodiment takes DC inverter heating component 2 as an example.

[0044] The DC inverter compressor 23 continuously draws in the gaseous refrigerant generated in the DC inverter heat pump evaporator 22 and compresses it into a high-temperature, high-pressure superheated gas, which is then sent into the DC inverter heat pump condenser 21. The refrigerant is cooled by the cooling medium in the DC inverter heat pump condenser 21 and condenses into a liquid state. Then, it is throttled and depressurized by the first electronic expansion valve 27 to form a mixture of gaseous and liquid refrigerant, which then enters the DC inverter heat pump evaporator 22. The liquid refrigerant evaporates in the DC inverter heat pump evaporator 22, absorbing the latent heat of vaporization required by the object being cooled. Finally, the gaseous refrigerant in the DC inverter heat pump evaporator 22 is drawn in and compressed by the DC inverter compressor 23, thereby realizing the cycle of the entire DC inverter heating component 2.

[0045] The principle of the ultra-high temperature heating component 3 is largely the same as that of the DC inverter heating component 2. The difference lies in that, since the ultra-high temperature heating temperature is higher than that of the inverter heating component, the liquid refrigerant exiting the ultra-high temperature heat pump condenser 31 first enters the plate heat exchanger 35 for further cooling and subcooling. Most of the liquid refrigerant passes through the second dryer filter 36, the second electronic expansion valve 37, and the ultra-high temperature heat pump evaporator 32, finally returning to the ultra-high temperature heat pump compressor 33 to re-enter the cycle. A small portion of the liquid refrigerant passes through the fifth pipe and the third electronic expansion valve 4, and the plate heat exchanger 35 before returning to the ultra-high temperature heat pump compressor 33 to re-enter the cycle.

[0046] The exhaust air from the coating machine first exchanges heat with the outdoor fresh air through the sensible heat exchanger 11, and then undergoes multiple heat recovery processes through the ultra-high temperature heat pump evaporator 32 and the DC inverter heat pump evaporator 22 before being discharged to the outdoor environment. The outdoor fresh air is preheated by heat recovery through the sensible heat exchanger 11, and then undergoes multiple condensation and heating processes through the DC inverter heat pump condenser 21 and the ultra-high temperature heat pump condenser 31 before finally being sent into the coating machine oven 1 after being controlled by auxiliary electric heating.

[0047] The energy-saving heating unit absorbs the waste heat from the exhaust air of the coating machine. After the energy is boosted by the ultra-high temperature heat pump compressor 33 and the DC inverter compressor 23, the heat recovered by the ultra-high temperature heat pump condenser 31 and the DC inverter heat pump condenser 21, together with the heat generated by the electrical energy consumed by the ultra-high temperature heat pump compressor 33 and the DC inverter compressor 23, is used to heat the air intake of the coating machine.

[0048] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A heating device for a coating machine oven, comprising a coating machine oven (1), wherein both ends of the coating machine oven (1) are provided with an air inlet pipe and an air outlet pipe, the air inlet pipe and the air outlet pipe are arranged to cross each other, and a sensible heat exchanger (11) is provided at the intersection of the air inlet pipe and the air outlet pipe, and an auxiliary heater (12) is provided near the air inlet pipe of the coating machine oven (1), characterized in that, An energy-saving heating element is provided at the air inlet pipe of the coating machine oven (1), and the auxiliary heater (12) is located between the coating machine oven (1) and the energy-saving heating element; The energy-saving heating section heats the air that has not passed through the auxiliary heater (12).

2. The heating device for a coating machine oven according to claim 1, characterized in that: The energy-saving heating section includes a DC inverter heating component (2) and an ultra-high temperature heating component (3).

3. A heating device for a coating machine oven according to claim 2, characterized in that: The DC inverter heating assembly (2) includes a DC inverter heat pump condenser (21), which is installed on the air inlet pipe and is located between the auxiliary heater (12) and the sensible heat exchanger (11). A DC inverter heat pump evaporator (22) is installed on the air outlet duct, and the sensible heat exchanger (11) is located between the DC inverter heat pump evaporator (22) and the coating machine oven (1). A first pipe is provided between the inlet end of the DC inverter heat pump condenser (21) and the outlet end of the DC inverter heat pump evaporator (22), and a DC inverter compressor (23) and a first gas-liquid separator (24) are provided on the first pipe. A second pipe is provided between the outlet end of the DC inverter heat pump condenser (21) and the inlet end of the DC inverter heat pump evaporator (22). A first liquid storage tank (25), a first drying filter (26) and a first electronic expansion valve (27) are sequentially provided on the second pipe. The first liquid storage tank (25) is closest to the DC inverter heat pump condenser (21). The DC inverter heat pump condenser (21), the first liquid receiver (25), the first dryer filter (26), the first electronic expansion valve (27), the DC inverter heat pump evaporator (22), the first gas-liquid separator (24), and the DC inverter compressor (23) together form a circulation loop.

4. A heating device for a coating machine oven according to claim 2, characterized in that: The ultra-high temperature heating component (3) includes an ultra-high temperature heat pump condenser (31) and an ultra-high temperature heat pump evaporator (32). The ultra-high temperature heat pump condenser (31) is installed on the air inlet pipe, and the ultra-high temperature heat pump evaporator (32) is installed on the air outlet pipe. The ultra-high temperature heat pump condenser (31) is disposed between the auxiliary heater (12) and the sensible heat exchanger (11), and the sensible heat exchanger (11) is located between the ultra-high temperature heat pump evaporator (32) and the coating machine oven (1). A third pipe is provided between the inlet end of the ultra-high temperature heat pump condenser (31) and the outlet end of the ultra-high temperature heat pump evaporator (32). An ultra-high temperature heat pump compressor (33) and a second gas-liquid separator (34) are provided on the third pipe. The ultra-high temperature heat pump compressor (33) is located between the second gas-liquid separator (34) and the ultra-high temperature heat pump condenser (31). A fourth pipe is provided between the outlet end of the ultra-high temperature heat pump condenser (31) and the inlet end of the ultra-high temperature heat pump evaporator (32). A plate heat exchanger (35), a second dryer filter (36) and a second electronic expansion valve (37) are sequentially provided on the fourth pipe. The ultra-high temperature heat pump condenser (31), the ultra-high temperature heat pump evaporator (32), the ultra-high temperature heat pump compressor (33), the second gas-liquid separator (34), the plate heat exchanger (35), the second dryer filter (36), and the second electronic expansion valve (37) together form a circulation loop.

5. A heating device for a coating machine oven according to claim 4, characterized in that: A fifth pipe is provided between the plate heat exchanger (35) and the second dryer filter (36) at a certain point, and a third electronic expansion valve (4) is provided on the fifth pipe. The plate heat exchanger (35) and the ultra-high temperature heat pump compressor (33) are connected by a pipeline; The plate heat exchanger (35), the third electronic expansion valve (4), the ultra-high temperature heat pump compressor (33), and the ultra-high temperature heat pump condenser (31) together form a circulation loop.

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