Four-pipe air-cooled heat pump waste heat utilization system and building

Abstract

The utility model discloses a four-pipe air-cooled heat pump waste heat utilization system and a building, the system comprises a four-pipe air-cooled heat pump, a water-water heat exchanger and a high temperature type water source heat pump, a cold water circulation pump is arranged on a cold water loop of the four-pipe air-cooled heat pump, and a hot water circulation pump is arranged on a hot water loop of the four-pipe air-cooled heat pump; a hot water loop of the four-pipe air-cooled heat pump is provided with a first branch and a second branch which are connected in parallel, the first branch passes through a heat source channel of the water-water heat exchanger, the second branch passes through a heat source channel of the high-temperature water source heat pump, the inlet end of a temperature rising channel of the water-water heat exchanger is connected with a first water supply pipe, and the outlet end is connected with a low-temperature hot water outlet pipe. The inlet end of a temperature rising channel of the high-temperature type water source heat pump is connected with a second water supply pipe, and the outlet end of the temperature rising channel of the high-temperature type water source heat pump is connected with a high-temperature hot water outlet pipe. Valves are arranged at the inlet and outlet ends of the first branch and the second branch, upstream and downstream of the connecting pipe on the first water supply pipe and the low-temperature hot water outlet pipe, upstream and downstream of the connecting pipe on the second water supply pipe and the high-temperature hot water outlet pipe. According to the system, the waste heat of the four-pipe air-cooled heat pump can be used for preparing high-temperature hot water, the supply requirement of domestic hot water is met, the waste heat of the four-pipe air-cooled heat pump can also be used for preparing low-temperature hot water, other application requirements are met, and the waste heat of the four-pipe air-cooled heat pump is fully used.

Description

Technical Field

[0001] The utility model relates to a four-pipe air-cooling heat pump, in particular to a four-pipe air-cooling heat pump waste heat utilization system and a building. Background Art

[0002] In the air treatment process of purification air conditioning system, swimming pool air conditioning system, constant temperature and humidity air conditioning system, there is a condition of reheating after refrigeration and dehumidification in summer and transition season. The traditional method generally uses electric reheating, which not only offsets the cold and heat, but also consumes a lot of energy. With the increasing requirements of carbon neutrality and carbon emissions, electric reheating is no longer suitable for air conditioning systems, except for strict requirements on temperature and humidity.

[0003] The four-pipe air-cooled heat pump can produce cold water and hot water at the same time. The cold water temperature is 7 / 12℃, and the hot water temperature is 45 / 40℃. Unlike ordinary heat recovery that determines heat based on cold, cold water and hot water can operate independently according to usage needs without affecting each other. Reheating after refrigeration is equivalent to "free". The heating capacity and cooling capacity of the four-pipe air-cooled heat pump can be effectively utilized, and its system energy efficiency can reach above 9.0.

[0004] At present, four-pipe air-cooled heat pumps are increasingly used in purification plants, hotels, swimming pools, hospitals, experimental animal rooms and other fields; however, in actual use, its cooling capacity can be fully utilized, and only a small amount of heat can be utilized. The excess heat cannot meet the supply demand of domestic hot water due to the low water temperature (45 / 40℃), and is directly wasted. Therefore, the advantages of the four-pipe air-cooled heat pump are not fully utilized, that is, the remaining heat is not fully utilized. Utility Model Content

[0005] The purpose of the utility model is to provide a four-pipe air-cooling heat pump waste heat utilization system and a building comprising the system. The system can utilize the waste heat of the four-pipe air-cooling heat pump to prepare high-temperature hot water to meet the supply demand of domestic hot water, and can also utilize the waste heat of the four-pipe air-cooling heat pump to prepare low-temperature hot water to meet other application requirements, thereby making full use of the waste heat of the four-pipe air-cooling heat pump.

[0006] The technical solution adopted by the utility model is:

[0007] A four-pipe air-cooled heat pump waste heat utilization system comprises a four-pipe air-cooled heat pump, a water-water heat exchanger and a high-temperature water source heat pump, wherein a cold water circulation pump is arranged on the cold water circuit of the four-pipe air-cooled heat pump, and a hot water circulation pump is arranged on the hot water circuit; the hot water circuit of the four-pipe air-cooled heat pump comprises a first branch and a second branch connected in parallel, the first branch passes through a heat source channel of the water-water heat exchanger, and the second branch passes through a heat source channel of the high-temperature water source heat pump, the inlet end of the heating channel of the water-water heat exchanger is connected to a first water supply pipe, and the outlet end is connected to a low-temperature hot water outlet pipe, the inlet end of the heating channel of the high-temperature water source heat pump is connected to a second water supply pipe, and the outlet end is connected to a high-temperature hot water outlet pipe, the low-temperature hot water outlet pipe is connected to the second water supply pipe by a connecting pipe, and valves are arranged on the inlet and outlet ends of the first branch and the second branch, the first water supply pipe, the upstream and downstream of the connecting pipe on the low-temperature hot water outlet pipe, the connecting pipe, the upstream and downstream of the connecting pipe on the second water supply pipe, and the high-temperature hot water outlet pipe.

[0008] Preferably, when preparing low-temperature hot water, the valve on the first branch is opened, the valve on the second branch is closed, the valves on the first water supply pipe and the low-temperature hot water outlet pipe are opened, the valves on the connecting pipe, the second water supply pipe and the high-temperature hot water outlet pipe are closed, and the water-to-water heat exchanger is put into use.

[0009] Preferably, when preparing high-temperature hot water, the valve on the first branch is closed, the valve on the second branch is opened, the valves on the first water supply pipe, the low-temperature hot water outlet pipe and the connecting pipe are closed, the valves on the second water supply pipe and the high-temperature hot water outlet pipe are opened, and the high-temperature water source heat pump is put into use.

[0010] Preferably, when preparing high-temperature hot water, the valve on the first branch is closed, the valve on the second branch is opened, the valves on the first water supply pipe, the connecting pipe, and the high-temperature hot water outlet pipe are opened, the valve upstream of the connecting pipe on the low-temperature hot water outlet pipe is opened, and the valve downstream of the connecting pipe is closed, the valve upstream of the connecting pipe on the second water supply pipe is closed, and the valve downstream of the connecting pipe is opened, and the water-to-water heat exchanger and the high-temperature water source heat pump are used in series.

[0011] A building is equipped with the above four-pipe air-cooled heat pump waste heat utilization system.

[0012] The beneficial effects of the utility model are:

[0013] Based on the four-pipe air-cooled heat pump, the system adds a water-to-water heat exchanger and a high-temperature water source heat pump. By adjusting the opening and closing of the valve, different working states can be switched, so that the waste heat of the four-pipe air-cooled heat pump can be used to prepare high-temperature hot water to meet the supply demand of domestic hot water. The waste heat of the four-pipe air-cooled heat pump can also be used to prepare low-temperature hot water to meet other application requirements, making full use of the waste heat of the four-pipe air-cooled heat pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1It is a schematic diagram of a four-pipe air-cooled heat pump waste heat utilization system in the utility model.

[0015] Figure 2 It is a working schematic diagram of the four-pipe air-cooled heat pump waste heat utilization system in the first embodiment of the utility model.

[0016] Figure 3 It is a working schematic diagram of the four-pipe air-cooled heat pump waste heat utilization system in the second embodiment of the present utility model.

[0017] Figure 4 This is a working schematic diagram of a four-pipe air-cooled heat pump waste heat utilization system in Embodiment 3 of the present utility model.

[0018] In the figure: 1. Four-pipe air-cooled heat pump; 2. Water-to-water heat exchanger; 3. High-temperature water source heat pump; 4. Cold water circulation pump; 5. Hot water circulation pump; 6. First branch; 7. Second branch; 8. First water supply pipe; 9. Low-temperature hot water outlet pipe; 10. Second water supply pipe; 11. High-temperature hot water outlet pipe; 12. Connecting pipe. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0021] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0022] The features and performance of the present application are further described in detail below in conjunction with the embodiments.

[0023] The utility model discloses a four-pipe air-cooled heat pump waste heat utilization system, such as Figure 1 As shown, it includes a four-pipe air-cooled heat pump 1, a water-water heat exchanger 2 and a high-temperature water source heat pump 3; wherein:

[0024] The cold water circuit of the four-pipe air-cooled heat pump 1 is provided with a cold water circulation pump 4, and the hot water circuit is provided with a hot water circulation pump 5. Figure 1 ;

[0025] The hot water circuit of the four-pipe air-cooled heat pump 1 has a first branch 6 and a second branch 7 connected in parallel. The first branch 6 passes through the heat source channel of the water-water heat exchanger 2, and the second branch 7 passes through the heat source channel of the high-temperature water source heat pump 3. Figure 1 ;

[0026] The inlet end of the temperature rising channel of the water-water heat exchanger 2 is connected to the first water supply pipe 8, and the outlet end is connected to the low-temperature hot water outlet pipe 9. Figure 1 ;

[0027] The inlet end of the heating channel of the high temperature water source heat pump 3 is connected to the second water supply pipe 10, and the outlet end is connected to the high temperature hot water outlet pipe 11. The low temperature hot water outlet pipe 9 is connected to the second water supply pipe 10 by the connecting pipe 12. Figure 1 ;

[0028] Valves are provided at the inlet and outlet ends of the first branch 6 and the second branch 7, the first water supply pipe 8, the upstream and downstream of the connecting pipe 12 on the low-temperature hot water outlet pipe 9, the connecting pipe 12, the upstream and downstream of the connecting pipe 12 on the second water supply pipe 10, and the high-temperature hot water outlet pipe 11. Figure 1 .

[0029] Embodiment 1

[0030] like Figure 2 As shown, in this embodiment, when preparing low-temperature hot water, the valve on the first branch 6 is opened, the valve on the second branch 7 is closed, the valves on the first water supply pipe 8 and the low-temperature hot water outlet pipe 9 are opened, the valves on the connecting pipe 12, the second water supply pipe 10 and the high-temperature hot water outlet pipe 11 are closed, and the water-water heat exchanger 2 is put into use. Under the refrigeration condition of the four-pipe air-cooled heat pump 1, only a small part of its heating capacity is used for reheating after dehumidification, and the excess heat is used to prepare low-temperature hot water through the water-water heat exchanger 2 to obtain hot water of about 28°C, which can be used as hot water for swimming pools or other purposes.

[0031] Embodiment 2

[0032] like Figure 3As shown, in this embodiment, when preparing high-temperature hot water, the valve on the first branch 6 is closed, the valve on the second branch 7 is opened, the valves on the first water supply pipe 8, the low-temperature hot water outlet pipe 9 and the connecting pipe 12 are closed, the valves on the second water supply pipe 10 and the high-temperature hot water outlet pipe 11 are opened, and the high-temperature water source heat pump 3 is put into use. Under the refrigeration condition of the four-pipe air-cooled heat pump 1, only a small part of its heating capacity is used for reheating after dehumidification, and the excess heat is used to prepare high-temperature hot water through the high-temperature water source heat pump 3 (in addition to using the waste heat of the four-pipe air-cooled heat pump 1, the high-temperature water source heat pump 3 also has a heating function), and hot water of about 60°C is obtained, which can be used to supply domestic hot water that meets the temperature requirements of hotels, hospitals, etc.

[0033] Embodiment 3

[0034] like Figure 4 As shown, in this embodiment, when preparing high-temperature hot water, the valve on the first branch 6 is closed, the valve on the second branch 7 is opened, the valves on the first water supply pipe 8, the connecting pipe 12, and the high-temperature hot water outlet pipe 11 are opened, the valve upstream of the connecting pipe 12 on the low-temperature hot water outlet pipe 9 is opened, and the valve downstream of the connecting pipe 12 is closed, the valve upstream of the connecting pipe 12 on the second water supply pipe 7 is closed, and the valve downstream of the connecting pipe 12 is opened, and the water-water heat exchanger 2 and the high-temperature water source heat pump 3 are used in series. Under the refrigeration condition of the four-pipe air-cooled heat pump 1, only a small part of its heating capacity is used for reheating after dehumidification, and the excess heat is firstly raised through the water-water heat exchanger 2, and then further raised through the high-temperature water source heat pump 3 (using the heating function of the high-temperature water source heat pump 3 itself) to prepare high-temperature hot water at a higher temperature, and obtain hot water of about 75°C, which can be used to supply domestic hot water that meets the temperature requirements of hotels, hospitals, etc. When the demand for domestic hot water is large, the hot water temperature of the four-pipe air-cooled heat pump 1 can also be reduced, and the overall efficiency of the four-pipe air-cooled heat pump 1 can be reversely improved.

[0035] The system adds a water-to-water heat exchanger 2 and a high-temperature water source heat pump 3 on the basis of the four-pipe air-cooled heat pump 1. By adjusting the opening and closing conditions of the valves, different working states can be switched, so that the waste heat of the four-pipe air-cooled heat pump 1 can be used to prepare high-temperature hot water to meet the supply demand of domestic hot water, and the waste heat of the four-pipe air-cooled heat pump 1 can also be used to prepare low-temperature hot water to meet other application requirements.

[0036] The present application also requests protection for a building which is equipped with the above-mentioned four-pipe air-cooling heat pump waste heat utilization system. The building may be a swimming pool, a hotel, a hospital or other place where the four-pipe air-cooling heat pump waste heat utilization system can be utilized.

[0037] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

Claims

1. A four-pipe air-cooled heat pump waste heat utilization system, characterized in that: It includes a four-pipe air-cooled heat pump, a water-to-water heat exchanger and a high-temperature water source heat pump. The cold water circuit of the four-pipe air-cooled heat pump is provided with a cold water circulation pump, and the hot water circuit is provided with a hot water circulation pump; the hot water circuit of the four-pipe air-cooled heat pump has a first branch and a second branch connected in parallel, the first branch passes through the heat source channel of the water-to-water heat exchanger, and the second branch passes through the heat source channel of the high-temperature water source heat pump, the inlet end of the heating channel of the water-to-water heat exchanger is connected to the first water supply pipe, and the outlet end is connected to the low-temperature hot water outlet pipe, the inlet end of the heating channel of the high-temperature water source heat pump is connected to the second water supply pipe, and the outlet end is connected to the high-temperature hot water outlet pipe, the low-temperature hot water outlet pipe is connected to the second water supply pipe by a connecting pipe, and valves are provided on the inlet and outlet ends of the first branch and the second branch, the first water supply pipe, the upstream and downstream of the connecting pipe on the low-temperature hot water outlet pipe, the connecting pipe, the upstream and downstream of the connecting pipe on the second water supply pipe, and the high-temperature hot water outlet pipe.

2. The four-pipe air-cooled heat pump waste heat utilization system according to claim 1, characterized in that: When preparing low-temperature hot water, the valve on the first branch is opened, the valve on the second branch is closed, the valves on the first water supply pipe and the low-temperature hot water outlet pipe are opened, the valves on the connecting pipe, the second water supply pipe and the high-temperature hot water outlet pipe are closed, and the water-to-water heat exchanger is put into use.

3. The four-pipe air-cooled heat pump waste heat utilization system according to claim 1, characterized in that: When preparing high-temperature hot water, the valve on the first branch is closed, the valve on the second branch is opened, the valves on the first water supply pipe, the low-temperature hot water outlet pipe and the connecting pipe are closed, the valves on the second water supply pipe and the high-temperature hot water outlet pipe are opened, and the high-temperature water source heat pump is put into use.

4. The four-pipe air-cooled heat pump waste heat utilization system according to claim 1, characterized in that: When preparing high-temperature hot water, the valve on the first branch is closed, the valve on the second branch is opened, the valves on the first water supply pipe, the connecting pipe, and the high-temperature hot water outlet pipe are opened, the valve upstream of the connecting pipe on the low-temperature hot water outlet pipe is opened, and the valve downstream of the connecting pipe is closed, the valve upstream of the connecting pipe on the second water supply pipe is closed, and the valve downstream of the connecting pipe is opened, and the water-to-water heat exchanger and the high-temperature water source heat pump are used in series.

5. A building, characterized in that: Install the four-pipe air-cooled heat pump waste heat utilization system as described in any one of claims 1 to 4.

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