Water source heat pump system based on three-medium heat exchanger

Abstract

The utility model discloses a water source heat pump system based on a three-medium heat exchanger. The water source heat pump system comprises a heat pump, an evaporation three-medium heat exchanger and a condensation three-medium heat exchanger. The evaporation three-medium heat exchanger is connected with a first switch valve and a third switch valve, and the condensation three-medium heat exchanger is connected with a second switch valve and a fourth switch valve. Heat exchange among the water source side, the user side and the heat pump side is integrated in one heat exchanger, quick and simple switching of chilled water supply and hot water supply is achieved through switching of the four valves, the switching number of the valves is reduced, impurities in the water source are prevented from entering the heat pump, equipment integration is achieved, and the energy consumption is reduced. The problems that the heat exchange efficiency is reduced and dismounting and cleaning work is complex are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange, in particular to a water source heat pump system based on a three-medium heat exchanger. Background Art

[0002] Water source heat pumps are widely used in heating and air-conditioning systems as a technology for recovering low-temperature waste heat. There are sewage source heat pumps, river water source heat pumps, circulating cooling water source heat pumps, etc. All of them extract low-grade waste heat and then use it as a heat source for heating or process heat after it is upgraded by a heat pump.

[0003] Conventional water source heat pumps use eight valves to switch the water system when switching between heating and cooling modes, and the water source directly enters the heat pump condenser and evaporator. This can easily cause:

[0004] 1) There are many valves for switching between cooling and heating modes, which are prone to failure;

[0005] 2) The water source directly enters the heat pump condenser and evaporator, the heat pump heat exchanger is prone to scaling, and the dismantling and cleaning work is complicated. Summary of the invention

[0006] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a water source heat pump system based on a three-medium heat exchanger to solve the problems of reduced heat exchange efficiency and complicated dismantling and cleaning work of the heat pump in the prior art.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions to achieve the above problems: a water source heat pump system based on a three-medium heat exchanger includes a heat pump, an evaporation three-medium heat exchanger installed on one side of an evaporator in the heat pump, and a condensation three-medium heat exchanger installed on one side of a condenser in the heat pump;

[0008] A first switch valve is connected to the first evaporation heat exchange water inlet or the first evaporation heat exchange water outlet of the evaporation three-medium heat exchanger, the first evaporation heat exchange water inlet is connected to the first evaporation heat exchange water outlet, and the first evaporation heat exchange water outlet of the evaporation three-medium heat exchanger is used to supply cold water;

[0009] The second evaporation heat exchange water outlet of the evaporation three-medium heat exchanger is connected to the evaporator water inlet of the heat pump, and the evaporator water outlet of the evaporation three-medium heat exchanger is connected to the second evaporation heat exchange water inlet of the evaporation three-medium heat exchanger;

[0010] The second evaporation heat exchange water outlet is connected to the second evaporation heat exchange water inlet;

[0011] A second switch valve is connected to the first condensation heat exchange water inlet or the first condensation heat exchange water outlet of the condensation three-medium heat exchanger, and the first condensation heat exchange water outlet of the condensation three-medium heat exchanger is used for supplying hot water;

[0012] The first condensation heat exchange water inlet is connected to the first condensation heat exchange water outlet;

[0013] The second condensation heat exchange water outlet of the condensation three-medium heat exchanger is connected to the condenser water inlet of the heat pump, and the condenser water inlet of the condensation three-medium heat exchanger is connected to the second condensation heat exchange water inlet of the condensation three-medium heat exchanger;

[0014] The second condensation heat exchange water outlet is connected to the second condensation heat exchange water inlet;

[0015] The condenser water inlet is connected to the condenser water outlet;

[0016] The evaporative three-medium heat exchanger further includes a third evaporative heat exchange water inlet and a third evaporative heat exchange water outlet, and the third evaporative heat exchange water inlet or the third evaporative heat exchange water outlet is connected to a third switch valve;

[0017] The condensing three-medium heat exchanger further includes a third condensing heat exchange water inlet and a third condensing heat exchange water outlet, and the third condensing heat exchange water inlet or the third condensing heat exchange water outlet is connected to a fourth switch valve;

[0018] The third evaporation heat exchange water inlet is connected to the third condensation heat exchange water inlet, and the third evaporation heat exchange water outlet is connected to the third condensation heat exchange water outlet;

[0019] The third evaporation heat exchange water inlet is connected to the third evaporation heat exchange water outlet;

[0020] The third condensation heat exchange water inlet is connected to the third condensation heat exchange water outlet;

[0021] The third evaporation heat exchange water inlet and the third condensation heat exchange water inlet are also connected to a water source, and the third evaporation heat exchange water outlet and the third condensation heat exchange water outlet are also connected to a water source.

[0022] The utility model also has the following technical features:

[0023] A first circulating water pump is connected between the evaporation three-medium heat exchanger and the heat pump, and a second circulating water pump is connected between the condensation three-medium heat exchanger and the heat pump;

[0024] The first evaporation heat exchange water inlet of the evaporation three-medium heat exchanger is installed with a first evaporation heat exchange water inlet pipe, the first switch valve is installed on the first evaporation heat exchange water inlet pipe, and the first evaporation heat exchange water outlet of the evaporation three-medium heat exchanger is installed with a first evaporation heat exchange water outlet pipe;

[0025] The second evaporation heat exchange water outlet of the evaporation three-medium heat exchanger is connected to the evaporator water inlet of the heat pump through the evaporator water inlet pipe, and the evaporator water outlet of the evaporation three-medium heat exchanger is connected to the second evaporation heat exchange water inlet of the evaporation three-medium heat exchanger through the evaporator water outlet pipe;

[0026] The first circulating water pump is installed on the evaporator water outlet pipe;

[0027] The first condensation heat exchange water inlet of the condensation three-medium heat exchanger is installed with a first condensation heat exchange water inlet pipe, the second switch valve is installed on the first condensation heat exchange water inlet pipe, and the first condensation heat exchange water outlet of the condensation three-medium heat exchanger is installed with a first condensation heat exchange water outlet pipe;

[0028] The second condensation heat exchange water outlet of the condensation three-medium heat exchanger is connected to the condenser water inlet of the heat pump through a condenser water inlet pipe, and the condenser water inlet of the condensation three-medium heat exchanger is connected to the second condensation heat exchange water inlet connected to the condensation three-medium heat exchanger through a condenser water outlet pipe;

[0029] The second circulating water pump is installed on the condenser water outlet pipe;

[0030] The third evaporation heat exchange water inlet is connected to the third condensation heat exchange water inlet through a first water source pipe, and the first water source pipe is also connected to a second water source pipe;

[0031] The third evaporation heat exchange water outlet is connected to the third condensation heat exchange water outlet through a third water source pipe, and the third water source pipe is also connected to a fourth water source pipe;

[0032] The third switch valve and the fourth switch valve are both installed on the third water source pipe, and are respectively installed on both sides of the fourth water source pipe;

[0033] Compared with the prior art, the utility model has the following technical effects:

[0034] (I) The utility model provides a water source heat pump system based on a three-medium heat exchanger, which separates the heat pump from the water source through the three-medium heat exchanger, and concentrates the heat exchange between the water source side, the user side and the heat pump side in one heat exchanger. The four valves are switched to achieve quick and easy switching between the supply of chilled water and the supply of hot water, thereby reducing the number of valve switches and preventing impurities in the water source from entering the heat pump. At the same time, the equipment is concentrated, solving the problems of reduced heat exchange efficiency and complicated dismantling and cleaning work.

[0035] (II) The water source heat pump system based on the three-medium heat exchanger provided by the utility model has a simple structure, convenient operation, safety and reliability, and strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of the water source heat pump system based on the three-medium heat exchanger of the utility model.

[0037] The meaning of each symbol in the accompanying drawings:

[0038] 1-heat pump, 2-evaporation three-medium heat exchanger, 3-condensation three-medium heat exchanger; 4-first evaporation heat exchange water inlet, 5-first evaporation heat exchange water outlet, 6-first switch valve; 7-second evaporation heat exchange water outlet, 8-evaporator water inlet, 9-evaporator water outlet, 10-second evaporation heat exchange water inlet; 11-first condensation heat exchange water inlet, 12-first condensation heat exchange water outlet, 13-second switch valve; 14-second condensation heat exchange water outlet, 15-condenser water inlet, 16-condenser water outlet, 17-second condensation heat exchange water inlet; 18-third evaporation heat exchange water inlet, 19-third Three evaporation heat exchange outlets, 20-third switch valve; 21-third condensation heat exchange inlet, 22-third condensation heat exchange outlet, 23-fourth switch valve; 24-first circulation water pump, 25-second circulation water pump; 26-first evaporation heat exchange inlet pipe, 27-first evaporation heat exchange outlet pipe; 28-evaporator inlet pipe, 29-evaporator outlet pipe; 30-first condensation heat exchange inlet pipe, 31-first condensation heat exchange outlet pipe; 32-condenser inlet pipe, 33-condenser outlet pipe; 34-first water source pipe, 35-second water source pipe, 36-third water source pipe, 37-fourth water source pipe;

[0039] The specific contents of the utility model are further explained in detail below in conjunction with the embodiments. DETAILED DESCRIPTION

[0040] All components in the present invention, unless otherwise specified, are components known in the prior art.

[0041] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of the present application fall within the protection scope of the present invention.

[0042] Embodiment 1:

[0043] This embodiment provides a water source heat pump system based on a three-medium heat exchanger, as shown in 1, comprising a heat pump 1, an evaporation three-medium heat exchanger 2 installed on one side of the evaporator of the heat pump 1, and a condensation three-medium heat exchanger 3 installed on one side of the condenser of the heat pump 1;

[0044] The first evaporation heat exchange water inlet 4 or the first evaporation heat exchange water outlet 5 of the evaporation three-medium heat exchanger 2 is connected with a first switch valve 6, the first evaporation heat exchange water inlet 4 is connected with the first evaporation heat exchange water outlet 5, and the first evaporation heat exchange water outlet 5 of the evaporation three-medium heat exchanger 2 is used to supply cold water;

[0045] The second evaporation heat exchange water outlet 7 of the evaporation three-medium heat exchanger 2 is connected to the evaporator water inlet 8 of the heat pump 1, and the evaporator water outlet 9 of the evaporation three-medium heat exchanger 2 is connected to the second evaporation heat exchange water inlet 10 of the evaporation three-medium heat exchanger 2;

[0046] The second evaporation heat exchange water outlet 7 is connected to the second evaporation heat exchange water inlet 10;

[0047] The first condensation heat exchange water inlet 11 or the first condensation heat exchange water outlet 12 of the condensation three-medium heat exchanger 3 is connected with a second switch valve 13, and the first condensation heat exchange water outlet 12 of the condensation three-medium heat exchanger 3 is used for supplying hot water;

[0048] The first condensation heat exchange water inlet 11 is connected to the first condensation heat exchange water outlet 12;

[0049] The second condensation heat exchange water outlet 14 of the condensation three-medium heat exchanger 3 is connected to the condenser water inlet 126 of the heat pump 1, and the condenser water inlet 126 of the condensation three-medium heat exchanger 3 is connected to the second condensation heat exchange water inlet 17 of the condensation three-medium heat exchanger 3;

[0050] The second condensation heat exchange water outlet 14 is connected to the second condensation heat exchange water inlet 17;

[0051] The condenser water inlet 15 is connected to the condenser water outlet 16;

[0052] The evaporative three-medium heat exchanger 2 further includes a third evaporative heat exchange water inlet 18 and a third evaporative heat exchange water outlet 19, and the third evaporative heat exchange water inlet 18 or the third evaporative heat exchange water outlet 19 is connected to a third switch valve 20;

[0053] The condensing three-medium heat exchanger 3 further includes a third condensing heat exchange water inlet 20 and a third condensing heat exchange water outlet 22, and the third condensing heat exchange water inlet 20 or the third condensing heat exchange water outlet 22 is connected to a fourth switch valve 23;

[0054] The third evaporation heat exchange water inlet 18 is connected to the third condensation heat exchange water inlet 20, and the third evaporation heat exchange water outlet 19 is connected to the third condensation heat exchange water outlet 22;

[0055] The third evaporation heat exchange water inlet 18 is connected to the third evaporation heat exchange water outlet 19;

[0056] The third condensation heat exchange water inlet 21 is connected to the third condensation heat exchange water outlet 22;

[0057] The third evaporation heat exchange water inlet 18 and the third condensation heat exchange water inlet 20 are also connected to a water source, and the third evaporation heat exchange water outlet 19 and the third condensation heat exchange water outlet 22 are also connected to a water source.

[0058] The utility model separates the heat pump from the water source through a three-medium heat exchanger, and concentrates the heat exchange among the water source side, the user side and the heat pump side in one heat exchanger, thereby avoiding the influence of the water source quality on the heat pump unit and realizing equipment concentration; the system can realize fast and easy switching between the supply of chilled water and the supply of hot water by switching four valves.

[0059] (1) The three-medium heat exchanger realizes the heat exchange operation mode under three media and two working conditions, achieving equipment concentration.

[0060] (2) The system form of coupling the three-medium heat exchanger with the heat pump protects the heat pump and realizes the simple switching between the two working conditions.

[0061] As a preferred embodiment of this invention:

[0062] A first circulating water pump 24 is connected between the evaporation three-medium heat exchanger 2 and the heat pump 1, and a second circulating water pump 25 is connected between the condensation three-medium heat exchanger 3 and the heat pump 1;

[0063] As a preferred embodiment of this invention:

[0064] The first evaporation heat exchange water inlet 4 of the evaporation three-medium heat exchanger 2 is installed with a first evaporation heat exchange water inlet pipe 26, the first switch valve 6 is installed on the first evaporation heat exchange water inlet pipe 26, and the first evaporation heat exchange water outlet 5 of the evaporation three-medium heat exchanger 2 is installed with a first evaporation heat exchange water outlet pipe 27;

[0065] The second evaporation heat exchange water outlet 7 of the evaporation three-medium heat exchanger 2 is connected to the evaporator water inlet 8 of the heat pump 1 through the evaporator water inlet pipe 28, and the evaporator water outlet 9 of the evaporation three-medium heat exchanger 2 is connected to the second evaporation heat exchange water inlet 10 of the evaporation three-medium heat exchanger 2 through the evaporator water outlet pipe 27;

[0066] The first circulating water pump 24 is installed on the evaporator water outlet pipe 27;

[0067] As a preferred embodiment of this invention:

[0068] The first condensation heat exchange water inlet 11 of the condensation three-medium heat exchanger 3 is installed with a first condensation heat exchange water inlet pipe 30, the second switch valve 13 is installed on the first condensation heat exchange water inlet pipe 30, and the first condensation heat exchange water outlet 12 of the condensation three-medium heat exchanger 3 is installed with a first condensation heat exchange water outlet pipe 31;

[0069] The second condensation heat exchange water outlet 14 of the condensation three-medium heat exchanger 3 is connected to the condenser water inlet 126 of the heat pump 1 through a condenser water inlet pipe 32, and the condenser water inlet 126 of the condensation three-medium heat exchanger 3 is connected to the second condensation heat exchange water inlet 17 connected to the condensation three-medium heat exchanger 3 through a condenser water outlet pipe 33;

[0070] The second circulating water pump 25 is installed on the condenser water outlet pipe 33;

[0071] As a preferred embodiment of this invention:

[0072] The third evaporation heat exchange water inlet 18 is connected to the third condensation heat exchange water inlet 20 via a first water source pipe 32, and the first water source pipe 32 is also connected to a second water source pipe 35;

[0073] The third evaporation heat exchange water outlet 19 is connected to the third condensation heat exchange water outlet 22 via a third water source pipe 36, and the third water source pipe 36 is also connected to a fourth water source pipe 37;

[0074] The third switch valve 20 and the fourth switch valve 23 are both installed on the third water source pipe 36 and are respectively installed on both sides of the fourth water source pipe 37 .

[0075] The second water source pipe 35 and the fourth water source pipe 37 are connected to a water source, which may be sewage, river water, circulating cooling water, etc.;

[0076] Under the condition of supplying chilled water, Figure 1 As shown, the second switch valve 13 and the third switch valve 20 are closed, the first switch valve 6 and the fourth switch valve 23 are opened; the heat pump 1, the second circulating water pump 25, and the first circulating water pump 24 are running. The chilled water produced by the evaporator side of the heat pump 1 is supplied to the end user after heat exchange through the evaporation three-medium heat exchanger 2, and the heat discharged by the heat pump 1 is exchanged with the water source through the evaporation three-medium heat exchanger 2, and the heat is dissipated into the water source.

[0077] In hot water supply conditions, Figure 1 As shown, the second switch valve 13 and the third switch valve 20 are open, 6-the first switch valve and 23-the fourth switch valve are closed; the heat pump 1, the second circulating water pump 25, and the first circulating water pump 24 are running. The evaporator side of the heat pump 1 extracts low-temperature waste heat from the water source through the evaporation three-medium heat exchanger 2, and the condenser side supplies the produced hot water to the end user through the condensation three-medium heat exchanger 3.

[0078] What is important about this system is that the switching between the chilled water supply and the hot water supply is done through four valves, ensuring the convenience of system switching.

[0079] The important thing about this system is that the evaporation three-medium heat exchanger 2 and the condensation three-medium heat exchanger 3 have three channels, which ensure the heat exchange effect under different working conditions while being integrated into one heat exchanger, thus realizing equipment intensiveness.

[0080] The important thing about this system is that the water source does not directly enter the condenser and evaporator of the heat pump, which protects the heat pump unit and reduces the work of dismantling and cleaning the condenser and evaporator.

[0081] The above technical solutions are only preferred specific implementation methods of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be thought of by any technician familiar with the field within the technical scope disclosed by the present utility model without creative work are all covered within the protection scope of the present utility model.

Claims

1. A water source heat pump system based on a three-medium heat exchanger, comprising a heat pump (1), characterized in that: It also includes an evaporation three-medium heat exchanger (2) installed on one side of the evaporator in the heat pump (1) and a condensation three-medium heat exchanger (3) installed on one side of the condenser in the heat pump (1); A first switch valve (6) is connected to the first evaporation heat exchange water inlet (4) or the first evaporation heat exchange water outlet (5) of the evaporation three-medium heat exchanger (2), and the first evaporation heat exchange water outlet (5) of the evaporation three-medium heat exchanger (2) is used to supply cold water; The first evaporation heat exchange water inlet (4) is connected to the first evaporation heat exchange water outlet (5); The second evaporation heat exchange water outlet (7) of the evaporation three-medium heat exchanger (2) is connected to the evaporator water inlet (8) of the heat pump (1), and the evaporator water outlet (9) of the heat pump (1) is connected to the second evaporation heat exchange water inlet (10) of the evaporation three-medium heat exchanger (2); The second evaporation heat exchange water outlet (7) is in communication with the second evaporation heat exchange water inlet (10); A second switch valve (13) is connected to the first condensation heat exchange water inlet (11) or the first condensation heat exchange water outlet (12) of the condensation three-medium heat exchanger (3), and the first condensation heat exchange water outlet (12) of the condensation three-medium heat exchanger (3) is used for supplying hot water; The first condensation heat exchange water inlet (11) is connected to the first condensation heat exchange water outlet (12); The second condensation heat exchange water outlet (14) of the condensation three-medium heat exchanger (3) is connected to the condenser water inlet (15) of the heat pump (1), and the condenser water outlet (16) of the heat pump (1) is connected to the second condensation heat exchange water inlet (17) of the condensation three-medium heat exchanger (3); The second condensation heat exchange water outlet (14) is connected to the second condensation heat exchange water inlet (17); The condenser water inlet (15) is connected to the condenser water outlet (16); The evaporative three-medium heat exchanger (2) further comprises a third evaporative heat exchange water inlet (18) and a third evaporative heat exchange water outlet (19), and the third evaporative heat exchange water inlet (18) or the third evaporative heat exchange water outlet (19) is connected to a third switch valve (20); The condensing three-medium heat exchanger (3) further comprises a third condensing heat exchange water inlet (21) and a third condensing heat exchange water outlet (22), and the third condensing heat exchange water inlet (21) or the third condensing heat exchange water outlet (22) is connected to a fourth switch valve (23); The third evaporation heat exchange water inlet (18) is connected to the third condensation heat exchange water inlet (21), and the third evaporation heat exchange water outlet (19) is connected to the third condensation heat exchange water outlet (22); The third evaporation heat exchange water inlet (18) is connected to the third evaporation heat exchange water outlet (19); The third condensation heat exchange water inlet (21) is connected to the third condensation heat exchange water outlet (22); The third evaporation heat exchange water inlet (18) and the third condensation heat exchange water inlet (21) are also connected to a water source, and the third evaporation heat exchange water outlet (19) and the third condensation heat exchange water outlet (22) are also connected to a water source.

2. The water source heat pump system based on a three-medium heat exchanger according to claim 1, characterized in that: A first circulating water pump (24) is connected between the evaporating three-medium heat exchanger (2) and the heat pump (1), and a second circulating water pump (25) is connected between the condensing three-medium heat exchanger (3) and the heat pump (1).

3. The water source heat pump system based on a three-medium heat exchanger according to claim 2, characterized in that: A first evaporation heat exchange water inlet pipe (26) is installed on the first evaporation heat exchange water inlet (4) of the evaporation three-medium heat exchanger (2), the first switch valve (6) is installed on the first evaporation heat exchange water inlet pipe (26), and a first evaporation heat exchange water outlet pipe (27) is installed on the first evaporation heat exchange water outlet (5) of the evaporation three-medium heat exchanger (2); The second evaporation heat exchange water outlet (7) of the evaporation three-medium heat exchanger (2) is connected to the evaporator water inlet (8) of the heat pump (1) via an evaporator water inlet pipe (28), and the evaporator water outlet (9) of the evaporation three-medium heat exchanger (2) is connected to the second evaporation heat exchange water inlet (10) of the evaporation three-medium heat exchanger (2) via an evaporator water outlet pipe (29); The first circulating water pump (24) is installed on the evaporator water outlet pipe (29).

4. The water source heat pump system based on a three-medium heat exchanger according to claim 3, characterized in that: A first condensation heat exchange water inlet pipe (30) is installed on the first condensation heat exchange water inlet (11) of the condensation three-medium heat exchanger (3), the second switch valve (13) is installed on the first condensation heat exchange water inlet pipe (30), and a first condensation heat exchange water outlet pipe (31) is installed on the first condensation heat exchange water outlet (12) of the condensation three-medium heat exchanger (3); The second condensation heat exchange water outlet (14) of the condensation three-medium heat exchanger (3) is connected to the condenser water inlet (15) of the heat pump (1) via a condenser water inlet pipe (32), and the condenser water inlet (15) of the condensation three-medium heat exchanger (3) is connected to the second condensation heat exchange water inlet (17) connected to the condensation three-medium heat exchanger (3) via a condenser water outlet pipe (33); The second circulating water pump (25) is installed on the condenser water outlet pipe (33).

5. The water source heat pump system based on a three-medium heat exchanger according to claim 4, characterized in that: The third evaporation heat exchange water inlet (18) and the third condensation heat exchange water inlet (21) are connected via a first water source pipe (34), and the first water source pipe (34) is also connected to a second water source pipe (35); The third evaporation heat exchange water outlet (19) is connected to the third condensation heat exchange water outlet (22) via a third water source pipe (36), and the third water source pipe (36) is also connected to a fourth water source pipe (37); The third switch valve (20) and the fourth switch valve (23) are both installed on the third water source pipe (36) and are respectively installed on both sides of the fourth water source pipe (37).

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