Condensation waste heat recovery device

Abstract

The utility model relates to a condensation waste heat recovery device which comprises a main condenser, a heat exchanger and an automatic three-way valve, an exhaust port of a refrigerating unit is communicated with an inlet of the automatic three-way valve through an exhaust main pipeline, and an outlet of the automatic three-way valve is communicated with an inlet of the main condenser through an exhaust outer circulation pipeline. An outlet of the main condenser is communicated with a liquid falling opening of the refrigerating unit through a liquid falling pipeline, the other outlet of the automatic three-way valve is communicated with an inlet of the heat exchanger through an exhaust internal circulation pipeline, and an outlet of the heat exchanger is communicated with the liquid falling opening of the refrigerating unit. And the automatic three-way valve is electrically connected with the PLC. When a heating space is heated, the heat exchanger is communicated with the refrigerating unit through the automatic three-way valve, the heat exchanger heats the heating space while radiating and condensing the refrigerating unit, waste heat is recycled for assisting in heating, and energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery, in particular to a condensation waste heat recovery device. Background Art

[0002] In recent years, with the increasing global energy consumption and environmental pollution problems, people have paid more attention to the importance of energy conservation and emission reduction. As an important means of energy conservation and emission reduction, waste heat recovery plays an important role in practice. Waste heat recovery can effectively collect waste heat generated in many industrial processes and convert it into useful heat energy through a series of technical means for heating or power generation. This method can not only reduce energy consumption and save costs, but also reduce dependence on natural resources and reduce environmental pollution. For example, when using air conditioning for indoor temperature control, in summer, because the air conditioning blows out cold air during cooling, the indoor hot air rises and the cold air sinks, so the cooling effect is better and saves electricity. In winter, the air conditioning blows out hot air, and the hot air rises. It takes a long time to make the whole room feel warm. Therefore, the energy consumption of the air conditioner during heating is relatively high. If the heating can be assisted by condensing waste heat, the energy consumption can be effectively reduced. Utility Model Content

[0003] In order to solve the above technical problem or at least partially solve the above technical problem, the utility model provides a condensation waste heat recovery device.

[0004] The utility model provides a condensation waste heat recovery device, comprising: a refrigeration unit for refrigeration, a main condenser, a heat exchanger and an automatic three-way valve, the exhaust port of the refrigeration unit is connected with the inlet of the automatic three-way valve through an exhaust main pipeline, one outlet of the automatic three-way valve is connected with the inlet of the main condenser through an exhaust outer circulation pipeline, the outlet of the main condenser is connected with the liquid drop port of the refrigeration unit through a liquid drop pipeline, the other outlet of the automatic three-way valve is connected with the inlet of the heat exchanger through an exhaust inner circulation pipeline, and the outlet of the heat exchanger is connected with the liquid drop port of the refrigeration unit;

[0005] The automatic three-way valve is electrically connected to the PLC controller.

[0006] Furthermore, the inlet and outlet of the automatic three-way valve, the inlet and outlet of the main condenser and the inlet and outlet of the heat exchanger are all equipped with stop valves, and a one-way valve is arranged between the outlet of the main condenser and the outlet of the heat exchanger and the liquid drop pipe.

[0007] Furthermore, the refrigeration unit and the main condenser are arranged outside the heating space, and the heat exchanger is arranged in the heating space; a temperature sensor is arranged in the heating space, and the temperature sensor is communicatively connected to the PLC controller.

[0008] Furthermore, the main condenser includes: a diverter, the diverter is connected to the condenser, the condenser is arranged in a serpentine shape, and heat dissipation fins are arranged outside the condenser. The condenser and the heat dissipation fins are fixed on the main condenser frame, and the main condenser heat dissipation fan is arranged on the main condenser frame.

[0009] Furthermore, the refrigeration unit is provided with an air pressure transmitter, the air pressure transmitter is communicatively connected to the PLC controller, and the PLC controller is electrically connected to the fan drive circuit of the main condenser cooling fan; or, the refrigeration unit is connected with a pressure control switch, and the pressure control switch is arranged between the main condenser cooling fan and a power supply.

[0010] Furthermore, the heat exchanger comprises: a heat exchange tube, the heat exchange tube is arranged in a serpentine shape, a heat exchange fin is arranged outside the heat exchange tube, the heat exchange tube and the heat exchange fin are fixed on a heat exchanger frame, and a heat exchange fan is arranged on the heat exchanger frame.

[0011] Furthermore, the refrigeration unit is provided with an air pressure transmitter, the air pressure transmitter is communicatively connected to the PLC controller, and the PLC controller is electrically connected to the fan drive circuit of the heat exchanger; or, the refrigeration unit is connected to a second pressure control switch, and the second pressure control switch is arranged between the heat exchange fan and the power supply.

[0012] Furthermore, the outlet of the heat exchanger is connected to two branch pipes, each branch pipe is provided with a selection valve, one branch pipe is connected to the inlet of the auxiliary condenser, the outlet of the auxiliary condenser is connected to the liquid drop pipe, and the other branch pipe is connected to the liquid drop pipe.

[0013] Furthermore, a one-way valve is arranged between the outlet of the auxiliary condenser and the liquid drop pipe.

[0014] The above technical solution provided by the embodiment of the utility model has the following advantages compared with the prior art:

[0015] In the utility model, when heating is not needed for the heating space, the refrigeration unit is connected to the main condenser through the automatic three-way valve, and the main condenser dissipates heat and condenses the refrigeration unit. When heating the heating space, the heat exchanger is connected to the refrigeration unit through the automatic three-way valve, and the heat exchanger dissipates heat and condenses the refrigeration unit while heating the heating space, recovering waste heat to assist heating and reducing energy consumption.

[0016] In the utility model, during the heating process through the heat exchanger, if the temperature of the heating space reaches the set temperature, the main condenser is switched to heat dissipation and condensation to ensure the cooling effect of the refrigeration unit.

[0017] In the utility model, the heat exchanger is directly connected to the liquid falling pipe or is connected to the liquid falling pipe through an auxiliary condenser. When the set temperature is high and cannot reach the set temperature, and the heat dissipation and condensation of the heat exchanger alone cannot meet the refrigeration effect of the refrigeration unit, the heat exchanger is connected to the auxiliary condenser. The auxiliary condenser cooperates with the heat exchanger to ensure the heating of the heating space and meet the refrigeration needs of the refrigeration unit.

[0018] In the utility model, the main condenser heat dissipation fan and the auxiliary condenser heat dissipation fan are started when the natural heat dissipation of the main condenser and the auxiliary condenser cannot meet the refrigeration demand of the refrigeration unit, thereby saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 A schematic diagram of a condensation waste heat recovery device provided by the utility model;

[0022] Figure 2 A schematic diagram of a control circuit of a condensation waste heat recovery device provided by the utility model;

[0023] Figure 3 A schematic diagram of another condensation waste heat recovery device provided by the utility model;

[0024] Figure 4 A schematic diagram of another control circuit of a condensation waste heat recovery device provided by the utility model;

[0025] The symbols and their meanings in the figure are as follows:

[0026] 1. Refrigeration unit, 2. Main condenser, 3. Heat exchanger, 4. Automatic three-way valve, 5. Exhaust main pipeline, 6. Exhaust external circulation pipeline, 7. Exhaust internal circulation pipeline, 8. Liquid drop pipeline, 9. Heating space, 10. Auxiliary condenser. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0029] Example 1

[0030] See also Figure 1 and Figure 2 As shown, an embodiment of the utility model provides a condensation waste heat recovery device, including: an automatic three-way valve 4, a refrigeration unit 1 and a main condenser 2 arranged outside the heating space 9, a heat exchanger 3 arranged in the heating space 9, and a temperature sensor is arranged in the heating space (9), and the temperature sensor is communicatively connected to the PLC controller.

[0031] The exhaust port of the refrigeration unit 1 is connected to the inlet of the automatic three-way valve 4 through the exhaust main pipeline 5, one outlet of the automatic three-way valve 4 is connected to the inlet of the main condenser 2 through the exhaust external circulation pipeline 6, and the other outlet of the automatic three-way valve 4 is connected to the inlet of the heat exchanger 3.

[0032] The inlet and outlet of the automatic three-way valve 4 are both equipped with stop valves, and the automatic three-way valve 4 controls the connection between its own inlet and one of its own outlets. In the specific implementation process, the automatic three-way valve 4 is connected to the PLC controller via the valve drive circuit, and the PLC controller controls the automatic three-way valve 4 to be in the startup or normally open state. In the normally open state, the automatic three-way valve 4 connects its own inlet with the main condenser 2, and in the startup state, the automatic three-way valve 4 connects its own inlet with the heat exchanger 3.

[0033] The main condenser 2 comprises: a diverter, the diverter is connected to the condenser tube, the condenser tube is arranged in a serpentine shape, heat dissipation fins are arranged outside the condenser tube, the condenser tube and the heat dissipation fins are fixed on the main condenser frame, and the main condenser heat dissipation fan is arranged on the main condenser frame.

[0034] The heat exchanger 3 comprises: a heat exchange tube, the heat exchange tube is arranged in a serpentine shape, a heat exchange fin is arranged outside the heat exchange tube, the heat exchange tube and the heat exchange fin are fixed on a heat exchange frame, and a heat exchange fan is arranged on the heat exchange frame.

[0035] The outlet of the main condenser 2 is connected to the liquid outlet of the refrigeration unit 1 through the liquid outlet pipe 8, and the outlet of the heat exchanger 3 is connected to the liquid outlet of the refrigeration unit 1. The inlet and outlet of the main condenser 2 and the inlet and outlet of the heat exchanger 3 are both installed with stop valves, and a one-way valve is set between the outlet of the main condenser 2 and the outlet of the heat exchanger 3 and the liquid outlet pipe 8.

[0036] To save energy, the main condenser cooling fan of the main condenser 2 is turned on and off according to the pressure of the refrigeration unit 1. Specifically, the refrigeration unit 1 is provided with an air pressure transmitter, and the air pressure transmitter is communicatively connected to the PLC controller, and the PLC controller is electrically connected to the fan driving circuit of the main condenser cooling fan. When the pressure is higher than the set value and the main condenser 2 is working, the PLC controller controls the main condenser cooling fan to start.

[0037] The working principle of the embodiment of the present application is as follows:

[0038] When the heating space 9 does not need heating, the PLC controller controls the automatic three-way valve 4 to be in a normally open state, and the refrigeration unit 1 is connected to the main condenser 2 through the exhaust main pipeline 5 and the exhaust external circulation pipeline 6, and the main condenser 2 is used to condense and dissipate heat for the refrigeration unit 1.

[0039] When the heating space 9 needs to be heated, the PLC controller controls the automatic three-way valve 4 to be in the start-up state, and the refrigeration unit 1 is connected to the heat exchanger 3 through the exhaust main pipeline 5 and the exhaust internal circulation pipeline 7, and the heat exchanger 3 is used to condense and dissipate heat for the refrigeration unit 1, and the heat dissipated by the heat exchanger 3 is used to heat the heating space 9. In the specific implementation process, the PLC controller uses a temperature sensor to monitor the temperature of the heating space 9. When the temperature is higher than the set temperature, the PLC controller controls the automatic three-way valve 4 to be in the normally open state, and the refrigeration unit 1 is connected to the main condenser 2 through the exhaust main pipeline 5 and the exhaust external circulation pipeline 6, and the main condenser 2 is used to condense and dissipate heat for the refrigeration unit 1. When the temperature is lower than the set temperature, the PLC controller controls the automatic three-way valve 4 to be in the start-up state, and the refrigeration unit 1 is connected to the heat exchanger 3 through the exhaust main pipeline 5 and the exhaust internal circulation pipeline 7, and the heat exchanger 3 is used to condense and dissipate heat for the refrigeration unit 1, and the heat dissipated by the heat exchanger 3 is used to heat the heating space 9.

[0040] Example 2

[0041] See also Figure 3 and Figure 4 As shown, the present application provides an embodiment of the utility model to provide a condensation waste heat recovery device, including: an automatic three-way valve 4, a refrigeration unit 1, a main condenser 2 and an auxiliary condenser 10 arranged outside the heating space 9, a heat exchanger 3 arranged in the heating space 9, a temperature sensor is arranged in the heating space 9, and the temperature sensor is communicatively connected to the PLC controller.

[0042] See also Figure 2 As shown, the exhaust port of the refrigeration unit 1 is connected to the inlet of the automatic three-way valve 4 through the exhaust main pipeline 5, one outlet of the automatic three-way valve 4 is connected to the inlet of the main condenser 2 through the exhaust external circulation pipeline 6, and the other outlet of the automatic three-way valve 4 is connected to the inlet of the heat exchanger 3.

[0043] The inlet and outlet of the automatic three-way valve 4 are both equipped with stop valves, and the automatic three-way valve 4 controls the connection between its own inlet and one of its own outlets. In the specific implementation process, the automatic three-way valve 4 is connected to the PLC controller via the valve drive circuit, and the PLC controller controls the automatic three-way valve 4 to be in the startup or normally open state. In the normally open state, the automatic three-way valve 4 connects its own inlet with the main condenser 2, and in the startup state, the automatic three-way valve 4 connects its own inlet with the heat exchanger 3.

[0044] The main condenser 2 includes: a diverter, the diverter is connected to the condenser, the condenser is arranged in a serpentine shape, and heat dissipation fins are arranged outside the condenser, the condenser and the heat dissipation fins are fixed on the main condenser frame, and the main condenser frame is provided with a main condenser heat dissipation fan; the PLC controller is electrically connected to the fan drive circuit of the main condenser heat dissipation fan, and the refrigeration unit 1 is provided with an air pressure transmitter, and the air pressure transmitter is communicatively connected to the PLC controller.

[0045] The auxiliary condenser 10 has the same structure as the main condenser 2, and its heat dissipation performance is lower than that of the main condenser 2; the PLC controller is electrically connected to the fan driving circuit of the auxiliary condenser cooling fan of the auxiliary condenser, and the refrigeration unit 1 is provided with an air pressure transmitter, and the air pressure transmitter is communicatively connected to the PLC controller.

[0046] The heat exchanger 3 comprises: a heat exchange tube, the heat exchange tube is arranged in a serpentine shape, a heat exchange fin is arranged outside the heat exchange tube, the heat exchange tube and the heat exchange fin are fixed on a heat exchange frame, and a heat exchange fan is arranged on the heat exchange frame.

[0047] The outlet of the main condenser 2 is connected to the liquid drop port of the refrigeration unit 1 through the liquid drop pipe 8, and the outlet of the heat exchanger 3 is connected to two branch pipes. A selection valve is set on each branch pipe. One branch pipe is connected to the inlet of the auxiliary condenser 10, and the outlet of the auxiliary condenser 10 is connected to the liquid drop pipe 8, and the other branch pipe is connected to the liquid drop pipe 8. The selection valve is electrically connected to the PLC controller.

[0048] The inlet and outlet of the main condenser 2 and the inlet and outlet of the heat exchanger 3 are both installed with stop valves, and a one-way valve is set between the outlet of the main condenser 2, the outlet of the heat exchanger 3 and the outlet of the auxiliary condenser 10 and the liquid drop pipe 8.

[0049] To save energy, the main condenser cooling fan of the main condenser 2 is turned on and off according to the pressure of the refrigeration unit 1. Specifically, when the pressure of the refrigeration unit 1 is detected to be higher than the set value and the main condenser 2 is working, the PLC controller controls the main condenser cooling fan to start.

[0050] In order to save energy and ensure the cooling effect of the refrigeration unit 1, during the heating process, the auxiliary condenser 10 is enabled and disabled according to the pressure of the refrigeration unit 1, and further, the auxiliary condenser cooling fan of the auxiliary condenser 10 is turned on and off according to the pressure of the refrigeration unit 1.

[0051] The working principle of the embodiment of the present application is as follows:

[0052] When the heating space 9 does not need heating, the PLC controller controls the automatic three-way valve 4 to be in a normally open state, and the refrigeration unit 1 is connected to the main condenser 2 through the exhaust main pipeline 5 and the exhaust external circulation pipeline 6, and the main condenser 2 is used to condense and dissipate heat for the refrigeration unit 1.

[0053] When the heating space 9 needs to be heated, the PLC controller controls the automatic three-way valve 4 to be in the start-up state, and the refrigeration unit 1 is connected to the heat exchanger 3 through the exhaust main pipeline 5 and the exhaust internal circulation pipeline 7, and the heat exchanger 3 is used to condense and dissipate heat for the refrigeration unit 1, and the heat dissipated by the heat exchanger 3 is used to heat the heating space 9. In the specific implementation process, the PLC controller uses a temperature sensor to monitor the temperature of the heating space 9. When the temperature is higher than the set temperature, the PLC controller controls the automatic three-way valve 4 to be in the normally open state, and the refrigeration unit 1 is connected to the main condenser 2 through the exhaust main pipeline 5 and the exhaust external circulation pipeline 6, and the main condenser 2 is used to condense and dissipate heat for the refrigeration unit 1. When the temperature is lower than the set temperature, the PLC controller controls the automatic three-way valve 4 to be in the start-up state, and the refrigeration unit 1 is connected to the heat exchanger 3 through the exhaust main pipeline 5 and the exhaust internal circulation pipeline 7, and the heat exchanger 3 is used to condense and dissipate heat for the refrigeration unit 1, and the heat dissipated by the heat exchanger 3 is used to heat the heating space 9.

[0054] When the temperature cannot reach the set temperature and the air pressure of the refrigeration unit 1 reaches the set air pressure threshold, the PLC controller controls the selection valve to close the branch pipe between the heat exchanger 3 and the liquid drop pipe 8, controls the selection valve to connect the heat exchanger 3 to the auxiliary condenser 10, and closes the auxiliary condenser cooling fan of the auxiliary condenser 10. Continue to detect the pressure of the refrigeration unit 1. If the auxiliary condenser cooling fan can reduce the pressure of the refrigeration unit 1 to the set threshold by closing the auxiliary condenser cooling fan, it is maintained. Otherwise, the PLC controller controls the auxiliary condenser cooling fan to start.

[0055] In the embodiments provided by the present utility model, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the description division of the circuit is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling shown or discussed can be an indirect coupling through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0056] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A condensation waste heat recovery device, comprising: A refrigeration unit (1) for refrigeration, characterized in that it comprises: a main condenser (2), a heat exchanger (3) and an automatic three-way valve (4), wherein the exhaust port of the refrigeration unit (1) is connected to the inlet of the automatic three-way valve (4) through an exhaust main pipeline (5), one outlet of the automatic three-way valve (4) is connected to the inlet of the main condenser (2) through an exhaust external circulation pipeline (6), the outlet of the main condenser (2) is connected to the liquid drop outlet of the refrigeration unit (1) through a liquid drop pipeline (8), the other outlet of the automatic three-way valve (4) is connected to the inlet of the heat exchanger (3) through an exhaust internal circulation pipeline (7), and the outlet of the heat exchanger (3) is connected to the liquid drop outlet of the refrigeration unit (1); The automatic three-way valve (4) is electrically connected to a PLC controller.

2. The condensation waste heat recovery device according to claim 1, characterized in that: The inlet and outlet of the automatic three-way valve (4), the inlet and outlet of the main condenser (2) and the inlet and outlet of the heat exchanger (3) are all equipped with stop valves, and a one-way valve is arranged between the outlet of the main condenser (2) and the outlet of the heat exchanger (3) and the liquid drop pipe (8).

3. The condensation waste heat recovery device according to claim 1, characterized in that: The refrigeration unit (1) and the main condenser (2) are arranged outside the heating space (9), and the heat exchanger (3) is arranged inside the heating space (9); a temperature sensor is arranged in the heating space (9), and the temperature sensor is communicatively connected to the PLC controller.

4. The condensation waste heat recovery device according to claim 1, characterized in that: The main condenser (2) comprises: a flow divider, the flow divider is connected to a condenser tube, the condenser tube is arranged in a serpentine shape, a heat dissipation fin is arranged outside the condenser tube, the condenser tube and the heat dissipation fin are fixed on a main condenser frame, and a main condenser heat dissipation fan is arranged on the main condenser frame.

5. The condensation waste heat recovery device according to claim 4, characterized in that: The refrigeration unit (1) is provided with an air pressure transmitter, the air pressure transmitter is communicatively connected to the PLC controller, and the PLC controller is electrically connected to the fan drive circuit of the main condenser cooling fan.

6. The condensation waste heat recovery device according to claim 1, characterized in that: The heat exchanger (3) comprises: a heat exchange tube, the heat exchange tube is arranged in a serpentine shape, a heat exchange fin is arranged outside the heat exchange tube, the heat exchange tube and the heat exchange fin are fixed on a heat exchanger frame, and a heat exchange fan is arranged on the heat exchanger frame.

7. The condensation waste heat recovery device according to claim 1, characterized in that: The outlet of the heat exchanger (3) is connected to two branch pipelines, each branch pipeline is provided with a selection valve, one branch pipeline is connected to the inlet of the auxiliary condenser (10), the outlet of the auxiliary condenser (10) is connected to the liquid drop pipeline (8), and the other branch pipeline is connected to the liquid drop pipeline (8), and the selection valve is electrically connected to the PLC controller.

8. The condensation waste heat recovery device according to claim 7, characterized in that: A one-way valve is arranged between the outlet of the auxiliary condenser (10) and the liquid drop pipe (8).

9. The condensation waste heat recovery device according to claim 7, characterized in that: The refrigeration unit (1) is provided with an air pressure transmitter, the air pressure transmitter is communicatively connected to the PLC controller, and the PLC controller is electrically connected to a fan driving circuit of an auxiliary condenser cooling fan of the auxiliary condenser (10).

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