A heat pump cooling and heating dual-purpose system

Abstract

A heat pump dual-use system for cooling and heating belongs to the technical field of heat pump units. The invention is characterized in that it comprises a heat pump unit, wherein the evaporator and the condenser of the heat pump unit are both shell and tube heat exchangers, the tube side inlet of the evaporator is connected to a hot water input pipe (16), the tube side outlet of the evaporator is connected to a cold water output pipe (18), the tube side inlet of the condenser is connected to a cold water input pipe (20), and the tube side outlet of the condenser is connected to a hot water output pipe (22). The heat pump unit of the heat pump dual-use system for cooling and heating absorbs heat from hot water through the evaporator and generates cold water of a specific temperature as required. The heat pump unit utilizes the absorbed heat to heat the cold water through the condenser to generate hot water of a specific temperature, thereby recovering the waste heat and being able to generate hot water of a specific temperature and cold water of a specific temperature, thereby avoiding heat waste and environmental damage, and being able to generate required hot water and cold water, and being easy to use.

Description

Technical Field

[0001] The invention discloses a heat pump dual-purpose cooling and heating system, belonging to the technical field of heat pump units. Background Art

[0002] In order to meet production needs, chemical plants usually install boilers to produce hot water. There is still a certain amount of heat in the hot water after use. Directly discharging this part of the hot water will not only cause heat waste, but also easily cause harm to the environment. In order to avoid heat waste and damage to the environment, the heat in the hot water is usually recovered through a heat exchanger before being discharged, and the recovered heat is used again to produce hot water. However, the existing technology has the following problems: 1) The temperature of the hot water required by the chemical plant is adjusted according to needs, and the existing hot water system such as boilers can only produce hot water of one temperature, which is very inconvenient to use; 2) At present, the factory not only needs hot water, but sometimes also needs cold water of a certain temperature, and the existing equipment cannot provide cold water of a specific temperature. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a heat pump hot and cold dual-purpose system which recovers the heat of hot water through a heat pump unit, utilizes the heat to produce hot water of a specific temperature, and can also produce cold water of a specific temperature.

[0004] The technical solution adopted by the present invention to solve the technical problem is: the heat pump dual-purpose cooling and heating system is characterized in that it includes a heat pump unit, the evaporator and condenser of the heat pump unit are both shell and tube heat exchangers, the tube inlet of the evaporator is connected to a hot water input pipe, the tube outlet of the evaporator is connected to a cold water output pipe, the tube inlet of the condenser is connected to a cold water input pipe, and the tube outlet of the condenser is connected to a hot water output pipe.

[0005] Preferably, the heat pump unit includes a compressor, an evaporator, a condenser and a four-way valve, the evaporator and the condenser are both shell and tube heat exchangers, the refrigerant outlet of the compressor is connected to the D tube of the four-way valve, the refrigerant inlet of the compressor is connected to the S tube of the four-way valve, the shell side inlet of the evaporator is connected to the E tube of the four-way valve, the shell side outlet of the condenser is connected to the C tube of the four-way valve, the shell side outlet of the evaporator is connected to the shell side inlet of the condenser, and the shell side outlet of the evaporator is connected to the shell side inlet of the condenser, and the shell side outlet of the evaporator is connected to the expansion valve.

[0006] Preferably, the heat pump unit is provided with at least two stages, the tube side of the evaporator of the heat pump unit is arranged in series, the tube side of the condenser of the heat pump unit is arranged in series, the hot water input pipe is connected to the tube side inlet of the evaporator of the first-stage heat pump unit, the cold water output pipe is connected to the tube side outlet of the evaporator of the last-stage heat pump unit, the cold water input pipe is connected to the tube side inlet of the condenser of the last-stage heat pump unit, and the hot water output pipe is connected to the tube side outlet of the condenser of the first-stage heat pump unit.

[0007] Preferably, the heat pump unit has three stages, the tubes of the first-stage evaporator, the second-stage evaporator and the third-stage evaporator of the three-stage heat pump unit are arranged in series, the tubes of the first-stage condenser, the second-stage condenser and the third-stage condenser of the three-stage heat pump unit are arranged in series, the hot water input pipe is connected to the tube inlet of the first-stage evaporator of the first-stage heat pump unit, the cold water output pipe is connected to the tube outlet of the third-stage evaporator of the three-stage heat pump unit, the cold water input pipe is connected to the tube inlet of the third-stage condenser of the three-stage heat pump unit, and the hot water output pipe is connected to the tube outlet of the first-stage condenser of the first-stage heat pump unit.

[0008] Preferably, a hot water input valve is provided on the hot water input pipe, and a cold water input valve is provided on the cold water input pipe.

[0009] Preferably, a cold water output valve is provided on the cold water output pipe, and a hot water output valve is provided on the hot water output pipe.

[0010] Preferably, the cold water input pipe is connected to the tube side outlet of the evaporator and the tube side inlet of the condenser of the heat pump unit.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The heat pump unit used in this heat pump hot and cold dual-purpose system absorbs heat from hot water through the evaporator and produces cold water of a specific temperature as needed. The heat pump unit uses the absorbed heat to heat the cold water through the condenser to produce hot water of a specific temperature, thereby recovering the waste heat and being able to produce hot water of a specific temperature and cold water of a specific temperature, which not only avoids heat waste, but also avoids damage to the environment, and can also produce the required hot water and cold water, and is easy to use.

[0013] 2. The heat pump unit is provided with at least two stages. The tubes of the evaporator of the heat pump unit are arranged in series, and the tubes of the condenser are also arranged in series, so as to realize multi-stage cooling of the hot water and multi-stage heating of the cold water. It can produce hot water of the required temperature and cold water of the required temperature, and has a wide range of adaptability.

[0014] 3. A hot water input valve is provided on the hot water input pipe, and a cold water input valve is provided on the cold water input pipe, so as to conveniently control the on / off and input speed of the hot water and cold water input, and the control is convenient.

[0015] 4. A cold water output valve is provided on the cold water output pipe, and a hot water output valve is provided on the hot water output pipe, which can conveniently control the output speed and output on-off of hot water and cold water respectively, making hot water and cold water easy to use.

[0016] 5. The cold water input pipe is connected with the pipe outlet of the evaporator of the heat pump unit. When hot water is input into the hot water input pipe, the hot water output pipe can output hot water, and the cold water output pipe can output cold water, thereby generating hot water and cold water at the same time, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The principle of the heat pump dual-use system is intended.

[0018] In the figure: 1, primary evaporator 2, secondary evaporator 3, tertiary evaporator 4, primary condenser 5, secondary condenser 6, tertiary condenser 7, primary compressor 8, secondary compressor 9, tertiary compressor 10, primary expansion valve 11, secondary expansion valve 12, tertiary expansion valve 13, primary four-way valve 14, secondary four-way valve 15, tertiary four-way valve 16, hot water input pipe 17, hot water input valve 18, cold water output pipe 19, cold water output valve 20, cold water input pipe 21, cold water input valve 22, hot water output pipe 23, hot water output valve. DETAILED DESCRIPTION

[0019] Figure 1 The best embodiment of the present invention is shown below in conjunction with the attached Figure 1 The present invention is further described.

[0020] A heat pump dual-use system for cooling and heating includes a heat pump unit, wherein the evaporator and the condenser of the heat pump unit are both shell and tube heat exchangers, the tube side inlet of the evaporator is connected to a hot water input pipe 16, the tube side outlet of the evaporator is connected to a cold water output pipe 18, the tube side inlet of the condenser is connected to a cold water input pipe 20, and the tube side outlet of the condenser is connected to a hot water output pipe 22. The heat pump unit used in the heat pump dual-use system for cooling and heating absorbs heat from hot water through the evaporator and generates cold water of a specific temperature as required, and the heat pump unit utilizes the absorbed heat to heat the cold water through the condenser to generate hot water of a specific temperature, thereby recovering the waste heat, and being able to generate hot water of a specific temperature and cold water of a specific temperature, thereby avoiding heat waste and environmental damage, and being able to generate required hot water and cold water, and being easy to use.

[0021] The present invention is further described below in conjunction with specific embodiments. However, people familiar with the art should understand that the detailed description given here in conjunction with the drawings is for better explanation, and the structure of the present invention necessarily exceeds these limited embodiments. For some equivalent replacement schemes or common means, they are no longer described in detail herein, but still belong to the scope of protection of the present application.

[0022] Specific: such as Figure 1As shown: the heat pump unit has at least two stages, the tubes of the evaporator of the heat pump unit are arranged in series, the tubes of the condenser of the heat pump unit are arranged in series, the hot water input pipe 16 is connected to the tube inlet of the evaporator of the first stage heat pump unit, the cold water output pipe is connected to the tube outlet of the evaporator of the last stage heat pump unit, the cold water input pipe 20 is connected to the tube inlet of the condenser of the last stage heat pump unit, and the hot water output pipe 22 is connected to the tube outlet of the condenser of the first stage heat pump unit.

[0023] A hot water input valve 17 is provided on the hot water input pipe 16, and a cold water output valve 19 is provided on the cold water output pipe 18, so that the speed and on / off of the hot water input and the cold water input can be controlled, and the control is convenient. A cold water input valve 21 is provided on the cold water input pipe 20, and a hot water output valve 23 is provided on the hot water output pipe 22, so that the on / off and output speed of the cold water output and the hot water output can be conveniently controlled, and the control is convenient and has a wide range of applications.

[0024] In this embodiment, the heat pump unit has three stages, including a primary heat pump unit, a secondary heat pump unit and a tertiary heat pump unit.

[0025] The first-stage heat pump unit includes a first-stage compressor 7, a first-stage evaporator 1, a first-stage condenser 4 and a first-stage four-way valve 13. The first-stage evaporator 1 and the first-stage condenser 4 are both shell and tube heat exchangers. The refrigerant outlet of the first-stage compressor 7 is connected to the D tube of the first-stage four-way valve 13, the refrigerant inlet of the first-stage compressor 7 is connected to the S tube of the first-stage four-way valve 13, the shell side inlet of the first-stage evaporator 1 is connected to the E tube of the first-stage four-way valve 13, the shell side outlet of the first-stage condenser 4 is connected to the C tube of the first-stage four-way valve 13, the shell side outlet of the first-stage evaporator 1 is connected to the shell side inlet of the first-stage condenser 4, and the shell side outlet of the first-stage evaporator 1 is connected to the shell side inlet of the first-stage condenser 4, and the shell side outlet of the first-stage evaporator 1 is connected to the first-stage expansion valve 10.

[0026] The two-stage heat pump unit includes a two-stage compressor 8, a two-stage evaporator 2, a two-stage condenser 5 and a two-stage four-way valve 14. The two-stage evaporator 2 and the two-stage condenser 5 are both shell and tube heat exchangers. The refrigerant outlet of the two-stage compressor 8 is connected to the D tube of the two-stage four-way valve 14, the refrigerant inlet of the two-stage compressor 8 is connected to the S tube of the two-stage four-way valve 14, the shell side inlet of the two-stage evaporator 2 is connected to the E tube of the two-stage four-way valve 14, the shell side outlet of the two-stage condenser 5 is connected to the C tube of the two-stage four-way valve 14, the shell side outlet of the two-stage evaporator 2 is connected to the shell side inlet of the two-stage condenser 5, and the shell side outlet of the two-stage evaporator 2 is connected to the shell side inlet of the two-stage condenser 5, and the shell side outlet of the two-stage evaporator 2 is connected to the two-stage expansion valve 11.

[0027] The three-stage heat pump unit includes a three-stage compressor 9, a three-stage evaporator 3, a three-stage condenser 6 and a three-stage four-way valve 15. The three-stage evaporator 3 and the three-stage condenser 6 are both shell and tube heat exchangers. The refrigerant outlet of the three-stage compressor 9 is connected to the D tube of the three-stage four-way valve 15, the refrigerant inlet of the three-stage compressor 9 is connected to the S tube of the three-stage four-way valve 15, the shell side inlet of the three-stage evaporator 3 is connected to the E tube of the three-stage four-way valve 15, the shell side outlet of the three-stage condenser 6 is connected to the C tube of the three-stage four-way valve 15, the shell side outlet of the three-stage evaporator 3 is connected to the shell side inlet of the three-stage condenser 6, and the shell side outlet of the three-stage evaporator 3 is connected to the shell side inlet of the three-stage condenser 6, and the shell side outlet of the three-stage evaporator 3 is connected to the shell side inlet of the three-stage condenser 6, and the shell side outlet of the three-stage evaporator 3 is connected to the three-stage expansion valve 12.

[0028] The output end of the hot water input pipe 16 is connected to the tube side inlet of the first-stage evaporator 1, the tube side outlet of the first-stage evaporator 1 is connected to the tube side inlet of the second-stage evaporator 2, the tube side outlet of the second-stage evaporator 2 is connected to the tube side inlet of the tertiary evaporator 3, and the tube side outlet of the tertiary evaporator 3 is connected to the input end of the cold water output pipe 18.

[0029] The tube inlet of the tertiary condenser 6 is connected to the output end of the cold water input pipe 18, the tube outlet of the tertiary condenser 6 is connected to the tube inlet of the secondary condenser 5, the tube outlet of the secondary condenser 5 is connected to the tube inlet of the primary condenser 4, and the tube outlet of the primary condenser 4 is connected to the input end of the hot water output pipe 22.

[0030] The hot water input pipe 20 can also connect the tube side outlet of the three-stage evaporator 3 with the tube side inlet of the three-stage condenser 6, so that cold water can be output through the cold water output pipe 18 or hot water can be output through the hot water output pipe 22 by relying solely on the hot water input through the hot water input pipe 16, which is convenient to use.

[0031] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A heat pump dual-purpose cooling and heating system, characterized in that: A heat pump unit is included, wherein the evaporator and condenser of the heat pump unit are both shell and tube heat exchangers, the tube inlet of the evaporator is connected to a hot water input pipe (16), the tube outlet of the evaporator is connected to a cold water output pipe (18), the tube inlet of the condenser is connected to a cold water input pipe (20), and the tube outlet of the condenser is connected to a hot water output pipe (22); The heat pump unit is provided with at least two stages, the tubes of the evaporator of the heat pump unit are arranged in series, the tubes of the condenser of the heat pump unit are arranged in series, the hot water input pipe (16) is connected to the tube inlet of the evaporator of the first stage heat pump unit, the cold water output pipe (18) is connected to the tube outlet of the evaporator of the last stage heat pump unit, the cold water input pipe (20) is connected to the tube inlet of the condenser of the last stage heat pump unit, and the hot water output pipe (22) is connected to the tube outlet of the condenser of the first stage heat pump unit; The heat pump unit has three stages, the tubes of the first-stage evaporator (1), the second-stage evaporator (2) and the third-stage evaporator (3) of the three-stage heat pump unit are arranged in series, the tubes of the first-stage condenser (4), the second-stage condenser (5) and the third-stage condenser (6) of the three-stage heat pump unit are arranged in series, the hot water input pipe (16) is connected to the tube inlet of the first-stage evaporator (1) of the first-stage heat pump unit, the cold water output pipe (18) is connected to the tube outlet of the third-stage evaporator (3) of the three-stage heat pump unit, the cold water input pipe (20) is connected to the tube inlet of the third-stage condenser (6) of the three-stage heat pump unit, and the hot water output pipe (22) is connected to the tube outlet of the first-stage condenser (4) of the first-stage heat pump unit; The hot water input pipe (16) is provided with a hot water input valve (17), and the cold water input pipe (20) is provided with a cold water input valve (21); The cold water output pipe (18) is provided with a cold water output valve (19), and the hot water output pipe (22) is provided with a hot water output valve (23); the cold water input pipe (20) is connected to the tube side outlet of the evaporator and the tube side inlet of the condenser of the heat pump unit.

2. The heat pump cooling and heating dual-purpose system according to claim 1, characterized in that: The heat pump unit includes a compressor, an evaporator, a condenser and a four-way valve. The evaporator and the condenser are both shell and tube heat exchangers. The refrigerant outlet of the compressor is connected to the D tube of the four-way valve, the refrigerant inlet of the compressor is connected to the S tube of the four-way valve, the shell side inlet of the evaporator is connected to the E tube of the four-way valve, the shell side outlet of the condenser is connected to the C tube of the four-way valve, the shell side outlet of the evaporator is connected to the shell side inlet of the condenser, and the shell side outlet of the evaporator is connected to the shell side inlet of the condenser, and the shell side outlet of the evaporator is connected to the expansion valve.

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