Heat recovery double-heat-exchanger structure with three-pipe condensation

Abstract

The utility model discloses a heat recovery double heat exchanger structure with three-pipe condensation, which comprises an outdoor unit, an indoor unit comprises an evaporator and a condensation heat recoverer, and the condensation heat recoverer is detachably mounted on the side wall of the evaporator and is attached to the side wall of the evaporator. An evaporation air pipe assembly and a heat recovery air pipe assembly are arranged on the same side of the evaporator and the condensation heat recoverer respectively, the evaporation air pipe assembly is connected with an air return pipe of the outdoor unit, and the heat recovery air pipe assembly is connected with an exhaust pipe of the outdoor unit. A heat recovery liquid pipe assembly is arranged on one side of the condensation heat recoverer, the evaporator and the heat recovery liquid pipe assembly are connected through a liquid separator assembly, and the liquid separator assembly is connected with a liquid pipe of the outdoor unit. Through the design, the effect of adjusting indoor air is achieved through exhaust waste heat of the compressor of the outdoor unit, use of an electric heater is effectively reduced, and the energy-saving effect is obvious.

Description

Technical Field

[0001] The utility model relates to the field of air-conditioning units, in particular to a heat recovery double heat exchanger structure with three-pipe condensation. Background Art

[0002] The condensation heat recovery heat exchanger is mainly used in low-temperature refrigeration and dehumidification systems. The condensation waste heat generated by the refrigeration system during refrigeration and dehumidification can be recovered through the condensation heat recovery heat exchanger to heat the dehumidified dry air, so as to achieve adjustable air outlet temperature of the dehumidification unit, which greatly saves the input energy consumption of the electric heater for dehumidification and reheating of the system.

[0003] However, in the existing structural design, the devices such as the liquid distributor, expansion valve, and gas collecting pipe of the evaporator often need to occupy a large space.

[0004] Therefore, when adding a condensing heat recovery heat exchanger, the structure is very limited by the evaporator structure, resulting in the need for the structures of the evaporator and the condensing heat recovery heat exchanger to be closely coordinated in design, low structural design efficiency, and a long development and production cycle. Utility Model Content

[0005] The main purpose of the utility model is to propose a heat recovery double heat exchanger structure with three-pipe condensation, aiming to achieve a standardized combination of an evaporator and a condensation heat recovery device with a compact structure.

[0006] To achieve the above objectives, the utility model proposes a heat recovery double heat exchanger structure with three-pipe condensation, comprising:

[0007] Outdoor unit;

[0008] The indoor unit includes an evaporator and a condensing heat recovery device, wherein the condensing heat recovery device is detachably mounted on the side wall of the evaporator and is in close contact with each other.

[0009] An evaporator air pipe assembly and a heat recovery air pipe assembly are respectively provided on the same side of the evaporator and the condensing heat recovery device, wherein the evaporator air pipe assembly is connected to the return air pipe of the outdoor unit, and the heat recovery air pipe assembly is connected to the exhaust pipe of the outdoor unit;

[0010] A heat recovery liquid pipe assembly is provided on one side of the condensing heat recovery device, the evaporator and the heat recovery liquid pipe assembly are connected via a liquid distributor assembly, and the liquid distributor assembly is connected to the liquid pipe of the outdoor unit.

[0011] In the technical solution of the utility model, the high-temperature gaseous refrigerant discharged from the compressor enters the outdoor unit condenser and the indoor unit condensing heat recovery device respectively through the exhaust pipe and becomes a medium-temperature liquid refrigerant. The liquid refrigerant in the condensing heat recovery device is throttled into a low-temperature liquid refrigerant through the heat recovery valve. The liquid refrigerant of the outdoor unit condenser enters the liquid distributor assembly 3 through the liquid inlet pipe L1, the filter 7 removes impurities in the refrigerant, and is throttled into a low-temperature liquid refrigerant through the refrigeration electronic expansion valve 8. The low-temperature liquid refrigerants at these two places are combined in the liquid inlet pipe L2 and then enter the evaporator through the liquid distributor pipe L3 for heat absorption and evaporation, thereby reducing the temperature and humidity of the hot air passing through the evaporator. The low-temperature and low-humidity air treated by the evaporator passes through the condensing heat recovery device again, is heated to the set temperature by the high-temperature gaseous refrigerant discharged by the compressor, and is then sent into the room, thereby achieving the purpose of dehumidification and temperature regulation, reducing the use of electric heaters, and effectively reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0013] Figure 2 Schematic diagram of the structure of the liquid dispenser assembly;

[0014] Figure 3 This is the schematic diagram of the refrigeration working condition.

[0015] In the figure,

[0016] Evaporator 1, condensing heat recovery device 2, liquid distributor assembly 3, liquid inlet pipe L1, liquid inlet pipe L2, liquid distributor L3, heat recovery liquid inlet pipe L4, filter 7, refrigeration expansion valve 8, heat recovery valve 9,

[0017] Evaporation gas pipe assembly 5, heat recovery gas pipe assembly 4, heat recovery liquid pipe assembly 6. DETAILED DESCRIPTION

[0018] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments 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.

[0019] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0020] In addition, if there are descriptions involving "first" or "second" etc. in the embodiments of the utility model, the descriptions of "first" or "second" etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0021] like Figures 1 to 3 As shown, a heat recovery double heat exchanger structure with three-pipe condensation includes:

[0022] Outdoor unit;

[0023] The indoor unit includes an evaporator 1 and a condensing heat recovery device 2. The condensing heat recovery device 2 is detachably mounted on the side wall of the evaporator 1 and is attached to each other.

[0024] The same side of the evaporator 1 and the condensing heat recovery device 2 is provided with an evaporation air pipe assembly 5 and a heat recovery air pipe assembly 4, respectively. The evaporation air pipe assembly 5 is connected to the return air pipe of the outdoor unit, and the heat recovery air pipe assembly 4 is connected to the exhaust pipe of the outdoor unit.

[0025] A heat recovery liquid pipe assembly 6 is provided on one side of the condensing heat recovery device 2. The evaporator 1 and the heat recovery liquid pipe assembly 6 are connected via a liquid distributor assembly 3. The liquid distributor assembly 3 is connected to the liquid pipe of the outdoor unit.

[0026] like Figure 3 In the overall structure shown, the high-temperature gaseous refrigerant discharged by the compressor enters the outdoor unit condenser and the indoor unit condensing heat recovery device 2 through the exhaust pipe respectively, and becomes a medium-temperature liquid refrigerant. The liquid refrigerant in the condensing heat recovery device 2 is throttled into a low-temperature liquid refrigerant through the heat recovery valve 9. The liquid refrigerant of the outdoor unit condenser enters the liquid distributor assembly 3 filter 7 through the liquid inlet pipe L1 to remove impurities in the refrigerant, and is throttled into a low-temperature liquid refrigerant through the refrigeration electronic expansion valve 8. The two low-temperature liquid refrigerants are merged in the liquid inlet pipe L2 and then enter the evaporator 1 through the liquid distributor L3 for heat absorption and evaporation, thereby reducing the temperature and humidity of the hot air passing through the evaporator 1. The low-temperature and low-humidity air treated by the evaporator 1 passes through the condensing heat recovery device 2 again, and is heated to the set temperature by the high-temperature gaseous refrigerant discharged by the compressor and then sent into the room, thereby achieving the purpose of dehumidification and temperature regulation, reducing the use of electric heaters, and effectively reducing energy consumption.

[0027] Specifically, the evaporator 1 and the condensing heat recovery device 2 are both fin-type structures, thereby realizing a winding arrangement, so that the evaporator air pipe assembly 5, the heat recovery air pipe assembly 4, the heat recovery liquid pipe assembly 6 and the liquid distributor assembly 3 are all on the same side.

[0028] More specifically, the evaporation gas pipe assembly 5, the heat recovery gas pipe assembly 4, the heat recovery liquid pipe assembly 6 and the liquid distributor assembly 3 are all on the same side, so that the structure is more compact and the overall volume is smaller.

[0029] In the embodiment of the present utility model, Figure 2 As shown, the liquid distributor assembly 3 includes a liquid inlet pipe L1, a liquid inlet pipe L2, a liquid distributor pipe L3, a heat recovery liquid inlet pipe L4, a filter, a refrigeration expansion valve 8 and a heat recovery valve 9.

[0030] The liquid inlet pipe L1 is connected to the liquid pipe of the outdoor unit;

[0031] The liquid dispensing tube L3 is connected to the evaporator 1, and the liquid dispensing tube L3 is connected to the liquid inlet tube L2.

[0032] The heat recovery liquid inlet pipe L4 is connected to the heat recovery liquid pipe assembly 6.

[0033] The heat recovery valve 9 is arranged between the liquid inlet pipe L2 and the heat recovery liquid inlet pipe L4;

[0034] The filter and the refrigeration expansion valve 8 are provided between the liquid inlet pipe L2 and the liquid inlet pipe L1.

[0035] Specifically, the condensing heat recovery device 2 is fixed to the left rear of the evaporator 1 by bolts.

[0036] More specifically, the length of the condensing heat recovery device 2 is shorter than that of the evaporator 1 and a avoidance zone is formed in the front of the condensing heat recovery device 2 , and the liquid distributor assembly 3 is arranged at the position of the avoidance zone.

[0037] In the embodiment of the utility model, the condensing heat recovery device 2 and the evaporator 1 are both frame structures, and the frames are fitted together.

[0038] 1. The liquid separator assembly 3 is cleverly designed to make the assembly structure compact, providing space for the installation of the condensing heat recovery device 2;

[0039] 2. The condensing heat recovery device 2 is installed close to the evaporator 1, with a compact structure, small space occupation and good integrity;

[0040] 3. The evaporator 1 and the condensing heat recovery device 2 can be produced separately, and only need to be connected to the heat recovery liquid inlet pipe L4 of the liquid distributor assembly 3 in the later stage, which is easy to install and effectively improves production efficiency;

[0041] 4. Through this design, the exhaust waste heat of the outdoor unit compressor is used to adjust the indoor air, effectively reducing the use of electric heaters, and achieving obvious energy-saving effects (the structure of the outdoor unit is prior art and will not be described in detail here).

[0042] The liquid inlet pipe L1, the liquid inlet pipe L2, the liquid distribution pipe L3, the heat recovery liquid inlet pipe L4, the filter, the refrigeration expansion valve 8 and the heat recovery valve 9 are connected by welding or threading. When used as a module, it is preferably fixed by welding to facilitate later assembly.

[0043] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A heat recovery double heat exchanger structure with three-pipe condensation, characterized in that: include: Outdoor unit; The indoor unit includes an evaporator and a condensing heat recovery device, wherein the condensing heat recovery device is detachably mounted on the side wall of the evaporator and is in close contact with each other. An evaporator air pipe assembly and a heat recovery air pipe assembly are respectively provided on the same side of the evaporator and the condensing heat recovery device, wherein the evaporator air pipe assembly is connected to the return air pipe of the outdoor unit, and the heat recovery air pipe assembly is connected to the exhaust pipe of the outdoor unit; A heat recovery liquid pipe assembly is provided on one side of the condensing heat recovery device, the evaporator and the heat recovery liquid pipe assembly are connected via a liquid distributor assembly, and the liquid distributor assembly is connected to the liquid pipe of the outdoor unit.

2. The heat recovery double heat exchanger structure with three-pipe condensation according to claim 1, characterized in that: The evaporator and the condensing heat recovery device are both fin-type structures.

3. The heat recovery double heat exchanger structure with three-pipe condensation according to claim 1, characterized in that: The evaporation gas pipe assembly, the heat recovery gas pipe assembly, the heat recovery liquid pipe assembly and the liquid distributor assembly are all located on the same side.

4. The heat recovery double heat exchanger structure with three-pipe condensation according to claim 1, characterized in that: The liquid distributor assembly includes a liquid inlet pipe L1, a liquid inlet pipe L2, a liquid distributor pipe L3, a heat recovery liquid inlet pipe L4, a filter, a refrigeration expansion valve and a heat recovery valve. The liquid inlet pipe L1 is connected to the liquid pipe of the outdoor unit; The liquid dispensing tube L3 is connected to the evaporator, and the liquid dispensing tube L3 is connected to the liquid inlet tube L2. The heat recovery liquid inlet pipe L4 is connected to the heat recovery liquid pipe assembly. The heat recovery valve is arranged between the liquid inlet pipe L2 and the heat recovery liquid inlet pipe L4; The filter and the refrigeration expansion valve are arranged between the liquid inlet pipe L2 and the liquid inlet pipe L1.

5. The heat recovery double heat exchanger structure with three-pipe condensation according to claim 1, characterized in that: The condensing heat recovery device is fixed to the left rear of the evaporator by bolts.

6. The heat recovery double heat exchanger structure with three-pipe condensation according to claim 1, characterized in that: The length of the condensing heat recovery device is shorter than that of the evaporator and forms an escape zone in the front of the condensing heat recovery device. The liquid distributor assembly is arranged at the position of the escape zone.

7. The heat recovery double heat exchanger structure with three-pipe condensation according to claim 5, characterized in that: The condensing heat recovery device and the evaporator are both frame structures, and the frames are fitted together.

8. The heat recovery double heat exchanger structure with three-pipe condensation according to claim 4, characterized in that: The liquid inlet pipe L1, the liquid inlet pipe L2, the liquid distribution pipe L3, the heat recovery liquid inlet pipe L4, the filter, the refrigeration expansion valve and the heat recovery valve are connected by welding or threading.

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