CN111928532A - A modular plate type double evaporator water source heat pump unit - Google Patents

Abstract

The invention proposes a modular plate type double evaporator water source heat pump unit, which includes a condenser, a compressor, an evaporator 1 and an evaporator 2. The condenser is provided with a preheating water inlet, a preheating water outlet, and a high-pressure refrigerant. Inlet, high pressure refrigerant outlet, heat source water outlet and heat source water inlet, refrigerant outlet and refrigerant inlet are provided on evaporator 1 and evaporator 2, heat source water outlet on evaporator 1 and heat source water on evaporator 2 The water inlet is connected; the refrigerant outlet on the first and second evaporators is connected with the inlet of the compressor through the refrigerant pipeline, and the outlet of the compressor is connected with the high-pressure refrigerant inlet through the refrigerant pipeline; the high-pressure refrigerant outlet is connected with the filter, the filter It is also connected with a liquid storage tank, and the liquid storage tank is connected with the refrigerant inlets on the first evaporator and the second evaporator through the supply pipeline. The beneficial effects are: inside the modular unit, each component is fixed and installed separately, each component is independent of each other, and the reserved space is convenient for technicians to perform independent maintenance on the components.

Description

A modular plate type double evaporator water source heat pump unit

technical field

The invention relates to the field of waste heat utilization, in particular to a modular plate type double evaporator water source heat pump unit.

Background technique

The waste heat resources generated by production and life have not been fully utilized in the rapid development stage of the country. With the continuous improvement of the country's environmental protection requirements in recent years, the recovery technology of waste heat resources such as waste water and waste gas has also been paid more and more attention by enterprises and institutions. At present, most of the utilization of waste heat resources in wastewater is mainly based on the heat pump technology relying on shell and tube heat exchangers, and the heat is extracted through forced heat exchange of waste heat sources by heat pump units. According to relevant standards, the use scenario of heat pump units is basically to reduce the waste heat resource of waste water from about 15 degrees to 7 degrees. When an enterprise has a high-temperature heat source, the heat cannot be fully recovered, and there is a lot of waste of resources.

Some enterprises recover high-temperature heat sources by connecting multiple heat pump units in series, but the working conditions of each heat pump unit connected in series in this way are different. When one of the heat pump units fails, the recovery efficiency of the subsequent units will be greatly reduced.

weakness is:

1. Most of the shell-and-tube heat exchangers of existing heat pump units are connected in series. When refrigerant leakage occurs due to certain factors, it is difficult to check the leakage location.

2. The compressor in the unit is fixed on the upper part of the condenser and the evaporator. Its structure is too compact. When a section of the heat exchanger fails and needs to be replaced, the unit needs to be disassembled to replace the faulty parts.

SUMMARY OF THE INVENTION

In order to solve the problems existing in the prior art, the present invention proposes a modular plate type double evaporator water source heat pump unit.

The technical scheme of the present invention is realized as follows:

A modular plate-type double-evaporator water source heat pump unit, comprising: a condenser, a compressor, an evaporator 1 and an evaporator 2, and the condenser is provided with a preheating water inlet, a preheating water outlet, and a high-pressure refrigerant. Inlet and high pressure refrigerant outlet, the first evaporator and the second evaporator are provided with a heat source water outlet, a heat source water inlet, a refrigerant outlet and a refrigerant inlet, and the heat source water outlet on the first evaporator is connected to the other. The heat source water inlet on the second evaporator is connected; the refrigerant outlet on the first evaporator and the second evaporator is connected with the inlet of the compressor through the refrigerant pipeline, and the outlet of the compressor connected to the high-pressure refrigerant inlet through a refrigerant pipeline;

The high-pressure refrigerant outlet is connected to a filter, the filter is also connected to a liquid storage tank, and the liquid storage tank is connected to the refrigerant inlets on the first evaporator and the second evaporator through a supply pipeline.

Further, an expansion valve is also provided on the supply pipeline.

Further, the condenser is a detachable plate heat exchanger.

Further, the first evaporator and the second evaporator are also detachable plate heat exchangers.

The beneficial effects of the present invention are:

1. Inside the modular unit, each component is fixed and installed separately, each component is independent of each other, and space is reserved for technicians to conduct independent maintenance on the components;

2. The modular unit adopts plate heat exchanger, which is smaller in size and lighter in weight than shell-and-tube heat exchangers with the same heat exchange area;

3. The modular installation feature enables technicians to disassemble and replace the problem parts without dismantling the entire unit, which greatly improves the maintenance efficiency and reduces the labor intensity of personnel;

4. The modular plate-type double-evaporator water source heat pump unit can fully recover the waste heat resources of wastewater with high temperature;

5. If the modular plate-type double-evaporator water source heat pump unit is applied to the central air-conditioning system of the building, the flow direction of the water supply in the system can be controlled by the electric valve in the pipeline, so as to achieve the effect of supplying cooling in summer and heating in winter, so as to meet the user's demand for cooling. Different needs for thermal resources.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in FIG. 1, a modular plate type double evaporator water source heat pump unit includes: a condenser 1, a compressor 2, an evaporator 1 3 and an evaporator 2 4, and a preheating water inlet 9 is arranged on the condenser 1 , preheating water outlet 8, high pressure refrigerant inlet 7, high pressure refrigerant outlet 16, evaporator one 3 and evaporator two 4 are provided with heat source water outlet 11 and heat source water inlet 12 and refrigerant outlet 14 and refrigerant inlet 13 , the heat source water outlet 11 on the evaporator one 3 is connected with the heat source water inlet 12 on the evaporator two 4; the refrigerant outlet 14 on the evaporator one 3 and the evaporator two 4 is connected to the compressor 2 through the refrigerant pipeline connection, the outlet of the compressor 2 is connected to the high-pressure refrigerant inlet 137 through the refrigerant pipeline;

The high-pressure refrigerant outlet 16 is connected to the filter 5, and the filter 5 is also connected to the liquid storage tank 6. The liquid storage tank 6 is connected to the refrigerant inlet 13 on the evaporator one 3 and the evaporator two 4 through the supply pipeline 15. An expansion valve 10 is also provided on the road 15 .

Condenser 1, evaporator one 3 and evaporator two 4 are also detachable plate heat exchangers.

The working process of the device is as follows:

Condenser 1, evaporator 1 3 and evaporator 2 4 are all heat exchange equipment, heat source water enters into evaporator 2 4 from heat source water inlet 12, heat source water and refrigerant conduct heat exchange in evaporator 2 4, exchange After completion, the heat source water enters the evaporator 1 and 3 for secondary exchange, and flows out from the heat source water outlet 11; the refrigerant absorbs heat and evaporates after heat exchange; The heat released in the condenser 1 exchanges heat with the heating water. After cooling, the refrigerant enters the liquid storage tank 6 through the filter 5, and the refrigerant in the liquid storage tank 6 re-enters the evaporator one 3 and the evaporator two through the expansion valve 10. 4 and perform another heat exchange with the water in the evaporator. During this process, the expansion valve 10 plays the role of throttling and reducing the pressure in the pipe. When the pressure is reduced, the temperature of the refrigerant will be further reduced, so that the refrigerant is still in the final stage. The endothermic effect in the initiation is better.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. within.

Claims (4)

1. The utility model provides a board-like two evaporimeter water source heat pump set of modularization which characterized in that includes: the condenser is provided with a preheated water inlet, a preheated water outlet, a high-pressure refrigerant inlet and a high-pressure refrigerant outlet, the evaporator I and the evaporator II are both provided with a heat source water outlet, a heat source water inlet, a refrigerant outlet and a refrigerant inlet, and the heat source water outlet on the evaporator I is connected with the heat source water inlet on the evaporator II; the refrigerant outlets of the first evaporator and the second evaporator are connected with the inlet of the compressor through a refrigerant pipeline, and the outlet of the compressor is connected with the high-pressure refrigerant inlet through a refrigerant pipeline;

the high-pressure refrigerant outlet is connected with a filter, the filter is further connected with a liquid storage tank, and the liquid storage tank is connected with the refrigerant inlets on the first evaporator and the second evaporator through a supply pipeline.

2. The modular plate type double-evaporator water source heat pump unit according to claim 1, wherein: an expansion valve is also arranged on the supply pipeline.

3. The modular plate type double-evaporator water source heat pump unit according to claim 1, wherein: the condenser is a detachable plate heat exchanger.

4. The modular plate type double-evaporator water source heat pump unit according to claim 1, wherein: the first evaporator and the second evaporator are also detachable plate heat exchangers.

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