Waste heat recovery system for outdoor unit of direct expansion type air conditioner

Abstract

The utility model discloses a waste heat recovery system for an outdoor unit of a direct expansion type air conditioner, which belongs to the technical field of energy-saving devices and comprises an outdoor unit, a casing and a heat converter. Wherein a condenser is installed in the outdoor unit, a condensation pipe is arranged in the condenser, the two ends of the condensation pipe are communicated with the interior of the room, the condensation pipe is filled with a refrigerant for transferring heat, gas or steam can be converted into liquid, and the heat in the condensation pipe is transferred into a medium near the condensation pipe. When the system runs, fluid used for transferring heat is filled between the machine shell and the condenser, the pump machine is installed in the machine shell, the machine shell is communicated with the condenser, meanwhile, the evaporation pipe is installed in the machine shell and is aligned with the pump machine, and therefore the pump machine can drive the fluid to flow between the evaporation pipe and the condensation pipe, and the heat transfer efficiency is improved. And then waste heat generated in the air outlet process of the outdoor unit is converted into recyclable energy through a heat exchange technology, so that the problem of serious energy consumption caused by insufficient heat utilization is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy-saving devices, in particular to a system for recovering waste heat from an outdoor unit of a direct expansion air conditioner. Background Art

[0002] The air outlet temperature of the outdoor unit of a traditional air conditioner is relatively high. The compressor transfers the heat to the outside, where it is taken away by the external environment. The heat cannot be collected and reused, resulting in a large amount of heat waste. This is especially true in the hot summer, which is the peak period for air conditioning use. Households often consume a lot of electricity, which puts a certain amount of pressure on the power supply of the power grid.

[0003] If the heat transferred by the air can be effectively utilized, it will undoubtedly relieve the power supply pressure of the power grid in the hot summer, and it will also reduce electricity costs for factories, institutions and even ordinary households.

[0004] In view of this, the applicant, based on the principle of heat exchange, directs the high-temperature refrigerant vapor from the indoor unit into the coil of the outdoor unit through the refrigerant pipe. The outdoor unit uses a pump to force the air to convectively exchange heat with the heat exchange coil, ultimately completing the heat energy conversion process and thereby solving the energy consumption problem. Utility Model Content

[0005] To this end, the utility model provides a system for recovering waste heat from an outdoor unit of a direct expansion air conditioner, so as to solve the problem in the prior art of serious energy consumption caused by insufficient utilization of heat transferred by the air conditioner.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] The utility model discloses a system for recovering waste heat from an outdoor unit of a direct expansion air conditioner, comprising:

[0008] The outdoor unit has a condenser installed inside. The condenser is provided with a condenser pipe, and both ends of the condenser pipe are connected to the indoor room:

[0009] a casing, in which a pump is installed, the casing is in communication with the condenser, and a fluid for transferring heat is filled between the casing and the condenser;

[0010] a heat converter, the tail of which is connected to an evaporation tube for collecting heat, wherein the evaporation tube is installed in the housing and aligned with the pump;

[0011] The pump drives the fluid to flow between the evaporating tube and the condensing tube, and the heat converter is connected to the user end through an input pipeline and forms a loop with the heat converter through an output pipeline.

[0012] Furthermore, the pump is an air pump or a fan, and the casing and the condenser are connected through air.

[0013] Furthermore, the evaporating tube and the condensing tube are vertical coils or horizontal coils.

[0014] Furthermore, the casing is detachably mounted on the outdoor unit.

[0015] Furthermore, the heat converter is a heat accumulator, and a thermoelectric battery is installed on the heat converter.

[0016] Furthermore, the evaporation tube and the condensation tube are made of metal material.

[0017] Furthermore, the casing is an elevated hollow structure so as to be hoisted by equipment.

[0018] Furthermore, the evaporation tube is provided with a data acquisition module, and the data acquisition module is used to detect the pressure, temperature and flow rate of the refrigerant at the inlet and outlet ends of the evaporation tube.

[0019] The utility model has the following advantages:

[0020] This utility model uses a condenser and evaporator tube to collect waste heat generated during the air flow from the outdoor unit. Using heat exchange technology, this waste heat is converted into reusable thermal energy, improving energy efficiency, reducing energy consumption, and alleviating environmental impact. Compared to existing technologies, this system can be independently installed on existing direct expansion air conditioner outdoor units. It offers the advantages of simple structure, stability, and reliability, resolving the existing problem of severe energy consumption caused by insufficient utilization of heat transferred by the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely illustrative, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0022] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in size, without affecting the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0023] Figure 1 This is a diagram of the waste heat recovery system of the direct expansion outdoor unit provided by the utility model;

[0024] Figure 2 A top view of the fan cover structure provided by the utility model;

[0025] Figure 3 A side view of the fan cover structure provided by the utility model;

[0026] In the figure: 1 outdoor unit; 2 condenser; 3 condenser tube; 4 casing; 5 pump; 6 evaporator tube; 7 heat exchanger; 8 output pipeline; 9 input pipeline; 10 user end. DETAILED DESCRIPTION

[0027] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can readily understand the other advantages and benefits of the present invention from the contents disclosed in this specification. Obviously, the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0028] Please refer to Figure 1-Figure 3 The waste heat recovery system for a direct expansion air conditioner outdoor unit disclosed in this utility model primarily utilizes heat conduction between high-temperature and low-temperature fluids through the coil walls. As the fluids flow within the coils, they exchange heat with the tube walls, transferring the fluid's heat to other components. The following describes the technical solution using specific embodiments.

[0029] In a specific embodiment disclosed in the present utility model, Figure 1 , comprising an outdoor unit 1, a housing 4, and a heat exchanger 7. The outdoor unit 1 houses a condenser 2, which in turn houses a condenser tube 3. Both ends of the condenser tube 3 are connected to the indoor environment and contain a heat transfer refrigerant. This refrigerant converts gas or vapor into liquid and rapidly transfers heat from the condenser tube 3 to the surrounding medium. In this embodiment, a heat transfer fluid is placed between the housing 4 and the condenser 2, and a pump 5 is installed within the housing 4. Since the housing 4 is connected to the condenser 2 and an evaporator tube 6 is installed within the housing 4 and aligned with the pump 5, the pump 5 can drive the fluid between the evaporator tube 6 and the condenser tube 3. The evaporator tube 6 is connected to the rear end of the heat exchanger 7 to collect heat. Furthermore, the heat exchanger 7 is connected to a user end 10 via an input line 9 and forms a circuit with the heat exchanger 7 via an output line 8.

[0030] In one embodiment of the present invention, the pump 5 is an air pump or fan, and the housing 4 and the condenser 2 are connected by air. In other words, heat is transferred through air. Alternatively, other types of fluids, such as water or oil, can be used to transfer heat using the pump 5.

[0031] In some embodiments, as Figure 2 and Figure 3 The evaporating tube 6 and the condensing tube 3 are vertical coils or horizontal coils, and the evaporating tube 6 and the condensing tube 3 are made of metal materials, which have good thermal conductivity. The shape of the coil can be spiral, U-shaped or other forms to increase the heat exchange area and improve the thermal conductivity efficiency.

[0032] In some embodiments, the housing 4 is removably mounted to the outdoor unit 1, for example, by being secured to the top of the outdoor unit body with nuts, facilitating removal, installation, and maintenance. Furthermore, the housing 4 is an elevated, hollow structure, allowing for lifting equipment and subsequent lowering of the evaporator tubes 6. The height of the housing 4 can be tailored to the number and arrangement of the evaporator tubes 6. For example, the appropriate evaporator tube diameter and coil spacing can be selected based on the size of the fan housing to meet waste heat recovery requirements and corresponding indoor cooling needs. Multiple units can also be connected in series or parallel to meet specific usage requirements.

[0033] Optionally, in some embodiments, the heat converter 7 is a heat accumulator, and a thermoelectric battery is installed on the heat converter 7. The thermoelectric battery can use the temperature difference between the inside and outside of the heat converter 7 to directly convert thermal energy into electrical energy. Thus, a part of the heat can be converted into electrical energy through the heat converter 7, and the heat utilization rate can be further improved by converting the energy type.

[0034] In some embodiments, the evaporator tube 6 is provided with a data acquisition module, which is used to detect the pressure, temperature and flow rate of the refrigerant at the inlet and outlet ends of the evaporator tube 6. The data acquisition module can monitor the operating status of the system in real time, thereby facilitating timely maintenance by maintenance personnel.

[0035] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, such modifications or improvements, without departing from the spirit of the present invention, are within the scope of protection claimed herein.

Claims

1. A system for recovering waste heat from a direct expansion air conditioner outdoor unit, characterized in that: include: The outdoor unit (1) has a condenser (2) installed therein. The condenser (2) is provided with a condenser pipe (3). Both ends of the condenser pipe (3) are connected to the indoor environment. a casing (4) having a pump (5) installed therein, the casing (4) being in communication with the condenser (2), and a fluid for transferring heat being filled between the casing (4) and the condenser (2); a heat converter (7) whose tail is connected to an evaporation tube (6) for collecting heat, wherein the evaporation tube (6) is installed in the housing (4) and aligned with the pump (5); The pump (5) drives the fluid to flow between the evaporating tube (6) and the condensing tube (3), and the heat converter (7) is connected to the user end (10) via an input pipeline (9) and forms a loop with the heat converter (7) via an output pipeline (8).

2. The waste heat recovery system for a direct expansion air conditioner outdoor unit according to claim 1, characterized in that: The pump (5) is an air pump or a fan, and the housing (4) and the condenser (2) are connected through air.

3. The waste heat recovery system for a direct expansion air conditioner outdoor unit according to claim 1, characterized in that: The evaporating tube (6) and the condensing tube (3) are vertical coils or horizontal coils.

4. The waste heat recovery system for a direct expansion air conditioner outdoor unit according to claim 1, characterized in that: The casing (4) is detachably mounted on the outdoor unit (1).

5. The waste heat recovery system for a direct expansion air conditioner outdoor unit according to claim 1, characterized in that: The heat converter (7) is a heat accumulator, and a thermoelectric battery is installed on the heat converter (7).

6. The waste heat recovery system for a direct expansion air conditioner outdoor unit according to claim 1, characterized in that: The evaporation tube (6) and the condensation tube (3) are made of metal material.

7. The waste heat recovery system for a direct expansion air conditioner outdoor unit according to claim 2, characterized in that: The casing (4) is an elevated hollow structure so as to be hoisted by equipment.

8. The waste heat recovery system for a direct expansion air conditioner outdoor unit according to claim 2, characterized in that: The evaporation tube (6) is provided with a data acquisition module, and the data acquisition module is used to detect the pressure, temperature and flow rate of the refrigerant at the inlet and outlet ends of the evaporation tube (6).

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