Water source heat pump temperature control system

Abstract

The utility model provides a temperature control system of a water source heat pump, which comprises a water source heat exchanger, a water flow channel, a condenser, an evaporator, a temperature sensor, a temperature sensor and a temperature sensor, and is characterized in that the water source heat exchanger is provided with a medium channel and a water flow channel; the first throttling device and the first electromagnetic valve are arranged between the condenser and the water source heat exchanger in parallel; the second flow control module comprises a second throttling device and a second electromagnetic valve, and the second throttling device and the second electromagnetic valve are arranged between the compressor and the water source heat exchanger in parallel; one end of the second electromagnetic valve is communicated with a medium channel of the water source heat exchanger; and one end of the second throttling device is communicated with the medium channel of the water source heat exchanger, and the other end is communicated with the evaporator. According to the scheme, the modes of the unit can be rapidly switched, and temperature control can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature control, in particular to a water source heat pump temperature control system. Background Art

[0002] Conventional heat pump drying units are mostly air source heat pump drying units, whose low-pressure side absorbs heat from the air by exchanging heat with the air. This type of unit is greatly affected by the temperature of the operating environment. When the temperature is low, the heat exchange on the low-pressure side is reduced, resulting in insufficient heating output of the unit; and because the evaporator is designed for heating mode, when used as a condenser in cooling mode, the system pressure may be too high or the cooling capacity may be insufficient due to insufficient heat exchange area.

[0003] In order to solve the above problems, conventional heat pump drying units mostly use one or more four-way reversing valves to switch between heating, cooling and dehumidification modes. The system composition is complex, and the four-way valve often needs to stop the compressor when switching. Therefore, the mode switching time is long, which is easy to cause fluctuations in the temperature of the drying room, which is not conducive to precise temperature control.

[0004] Therefore, the technical problem that the present application needs to solve is how to quickly switch the mode of the unit to facilitate precise temperature control. Utility Model Content

[0005] In order to solve the above technical problems, the utility model proposes a water source heat pump temperature control system. In the heating mode, the first throttling device controls the throttling, the first solenoid valve is closed, the second solenoid valve is opened, and the second throttling device is closed. In the cooling mode, the second throttling device controls the throttling, the first solenoid valve is opened, the second solenoid valve is closed, the first solenoid valve is fully opened, and the water source heat exchanger works, which can increase the supercooling degree and improve the cooling capacity. In the dehumidification mode, the second throttling device controls the throttling, the first solenoid valve is opened, the second solenoid valve is closed, and the first solenoid valve is fully opened. When the dehumidification capacity of the evaporator is sufficient, the water source heat exchanger does not participate in the heat exchange; when the dehumidification capacity of the evaporator is insufficient, the water source heat exchanger works to increase the supercooling degree before throttling and improve the dehumidification capacity of the dehumidification evaporator. This solution can quickly switch the mode of the unit and improve the control of temperature.

[0006] Specifically, the utility model proposes a water source heat pump temperature control system, including a compressor, a condenser and an evaporator, wherein the exhaust port of the compressor is used to connect to the condenser, and the air inlet of the compressor is used to connect to the evaporator, and further includes:

[0007] A water source heat exchanger, wherein the water source heat exchanger has a medium channel and a water flow channel, one end of the medium channel is used to connect to the condenser, and the other end of the medium channel is used to connect to the evaporator;

[0008] a first flow control module, the first flow control module comprising a first throttling device and a first solenoid valve, the first throttling device and the first solenoid valve being arranged in parallel between the condenser and the water source heat exchanger;

[0009] A second flow control module, the second flow control module includes a second throttling device and a second solenoid valve, the second throttling device and the second solenoid valve are arranged in parallel between the compressor and the water source heat exchanger; wherein,

[0010] One end of the second solenoid valve is used to connect to the medium channel of the water source heat exchanger, and the other end of the second solenoid valve is used to connect to the compressor;

[0011] One end of the second throttling device is used to connect to the medium channel of the water source heat exchanger, and the other end of the second throttling device is used to connect to the evaporator.

[0012] Preferably, a gas-liquid separator is provided at the air inlet of the compressor, and a first flow channel and a second flow channel are installed at the inlet end of the gas-liquid separator, the first flow channel is connected to the evaporator, and the second flow channel is connected to the second solenoid valve; the outflow end of the gas-liquid separator is connected to the air inlet of the compressor through a pipeline.

[0013] Preferably, a one-way valve is provided on the first flow channel to allow the medium in the evaporator to flow into the gas-liquid separator in one direction.

[0014] Preferably, a liquid storage tank is provided at the outflow end of the condenser.

[0015] Preferably, a first filter is provided at the outflow end of the liquid storage tank, a third flow channel and a fourth flow channel are installed at the outflow end of the first filter, the first throttling device is installed on the third flow channel, and the first solenoid valve is installed on the fourth flow channel.

[0016] Preferably, a second filter is provided at the medium outflow end of the water source heat exchanger, and the second filter is respectively connected to the second throttling device and the second solenoid valve.

[0017] Preferably, the condenser and the evaporator are in the same blowing channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required to be used in the embodiments or the description of the prior art will be briefly introduced below.

[0019] Figure 1 It is a schematic diagram of the structure of the water source heat pump temperature control system proposed in this embodiment.

[0020] The reference numerals in the accompanying drawings are as follows:

[0021] 11-compressor; 12-condenser; 13-evaporator; 14-water source heat exchanger; 15-first throttling device; 16-first solenoid valve; 17-second throttling device; 18-second solenoid valve; 19-gas-liquid separator; 20-first flow channel; 21-second flow channel; 22-one-way valve; 23-liquid storage tank; 24-first filter; 25-third flow channel; 26-fourth flow channel; 27-second filter. DETAILED DESCRIPTION

[0022] The technical solution of the present application is further described below in conjunction with specific embodiments, but the present application is not limited to these embodiments.

[0023] like Figure 1 As shown, this embodiment proposes a water source heat pump temperature control system, including a compressor 11, a condenser 12 and an evaporator 13, the exhaust port of the compressor 11 is used to connect to the condenser 12, and the air inlet of the compressor 11 is used to connect to the evaporator 13, and also includes:

[0024] A water source heat exchanger 14, the water source heat exchanger 14 has a medium channel and a water flow channel, one end of the medium channel is used to connect to the condenser 12, and the other end of the medium channel is used to connect to the evaporator 13;

[0025] A first flow control module, the first flow control module comprises a first throttling device 15 and a first solenoid valve 16, the first throttling device 15 and the first solenoid valve 16 are arranged in parallel between the condenser 12 and the water source heat exchanger 14;

[0026] The second flow control module includes a second throttling device 17 and a second solenoid valve 18. The second throttling device 17 and the second solenoid valve 18 are arranged in parallel between the compressor 11 and the water source heat exchanger 14; wherein,

[0027] One end of the second solenoid valve 18 is used to connect to the medium channel of the water source heat exchanger 14, and the other end of the second solenoid valve 18 is used to connect to the compressor 11;

[0028] One end of the second throttling device 17 is used to connect to the medium channel of the water source heat exchanger 14 , and the other end of the second throttling device 17 is used to connect to the evaporator 13 .

[0029] Technical effect of this solution: This solution can quickly switch the mode of the unit and improve the control of temperature.

[0030] This solution sets up a first flow control module and a second flow control module to switch the working mode of the system.

[0031] Among them, the control in the specific working mode is as follows:

[0032] In the heating mode, the first throttling control throttles, the first solenoid valve 16 is closed, the second solenoid valve 18 is opened, and the second throttling device 17 is closed.

[0033] In the cooling mode, the second throttling device 17 controls the throttling, the first solenoid valve 16 is opened, the second solenoid valve 18 is closed, the first solenoid valve 16 is fully opened, and the water source heat exchanger 14 works, which can increase the supercooling degree and improve the cooling capacity.

[0034] In the dehumidification mode, the second throttling device 17 controls the throttling, the first solenoid valve 16 is opened, the second solenoid valve 18 is closed, and the first solenoid valve 16 is fully opened. When the dehumidification capacity of the evaporator 13 is sufficient, the water source heat exchanger 14 does not participate in the heat exchange; when the dehumidification capacity of the evaporator 13 is insufficient, the water source heat exchanger 14 works to increase the subcooling before throttling and improve the dehumidification capacity of the dehumidification evaporator 13.

[0035] Adjustment of the above three modes can facilitate precise temperature control of the system.

[0036] As an implementation mode of this embodiment, a gas-liquid separator 19 is provided at the air inlet of the compressor 11, and a first flow channel 20 and a second flow channel 21 are installed at the inlet end of the gas-liquid separator 19. The first flow channel 20 is connected to the evaporator 13, and the second flow channel 21 is connected to the second solenoid valve 18; the outflow end of the gas-liquid separator 19 is connected to the air inlet of the compressor 11 through a pipeline.

[0037] The technical effect of this solution is that the gas-liquid separator 19 is used to allow the gaseous medium to flow into the compressor 11, so as to make the operation of the compressor 11 more stable.

[0038] As an implementation of this embodiment, a one-way valve 22 is provided on the first flow channel 20 to allow the medium in the evaporator 13 to flow into the gas-liquid separator 19 in a one-way manner.

[0039] The technical effect of this solution is to prevent the medium from flowing back into the evaporator 13, thereby improving the working stability of the entire system.

[0040] Furthermore, a liquid storage tank 23 is provided at the outflow end of the condenser 12 .

[0041] As an implementation mode of this embodiment, a first filter 24 is provided at the outflow end of the liquid storage tank 23, a third flow channel 25 and a fourth flow channel 26 are installed at the outflow end of the first filter 24, a first throttling device 15 is installed on the third flow channel 25, and a first solenoid valve 16 is installed on the fourth flow channel 26.

[0042] In this solution, when the first throttling device 15 is fully opened, the condenser 12 does not work when the first solenoid valve 16 is opened. When the first throttling device 15 is in the control state and the first solenoid valve 16 is closed, the condenser 12 works. This solution facilitates the control of the working state of the condenser 12.

[0043] Furthermore, a second filter 27 is provided at the medium outflow end of the water source heat exchanger 14 , and the second filter 27 is connected to the second throttling device 17 and the second solenoid valve 18 respectively.

[0044] As an implementation method of this embodiment, the condenser 12 and the evaporator 13 are in the same blowing channel. This solution has the effect of saving space.

[0045] The working process of this program is as follows:

[0046] In the heating mode, the first throttling control throttles, the first electromagnetic valve 16 is closed, the second electromagnetic valve 18 is opened, and the second throttling device 17 is closed. At this time, the condenser 12 releases heat and the evaporator 13 does not work.

[0047] In the cooling mode, the second throttling device 17 controls the throttling, the first solenoid valve 16 is opened, the second solenoid valve 18 is closed, the first solenoid valve 16 is fully opened, and the water source heat exchanger 14 works to increase the degree of subcooling and improve the cooling capacity. At this time, the condenser 12 does not exchange heat, and the evaporator 13 works to absorb heat and cool.

[0048] In the dehumidification mode, the second throttling device 17 controls the throttling, the first solenoid valve 16 is opened, the second solenoid valve 18 is closed, and the first solenoid valve 16 is fully opened. When the dehumidification capacity of the evaporator 13 is sufficient, the water source heat exchanger 14 does not participate in the heat exchange; when the dehumidification capacity of the evaporator 13 is insufficient, the water source heat exchanger 14 works to increase the supercooling degree before throttling and improve the dehumidification capacity of the dehumidification evaporator 13. At this time, the air in the environment is precooled by the evaporator 13 to produce droplets and be discharged, achieving the purpose of dehumidification.

[0049] For ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the utility model, which all fall within the protection scope of the utility model.

Claims

1. A water source heat pump temperature control system, comprising a compressor (11), a condenser (12) and an evaporator (13), wherein the exhaust port of the compressor (11) is used to connect to the condenser (12), and the air inlet of the compressor (11) is used to connect to the evaporator (13), characterized in that: Also includes: A water source heat exchanger (14), the water source heat exchanger (14) having a medium channel and a water flow channel, one end of the medium channel being used to connect to the condenser (12), and the other end of the medium channel being used to connect to the evaporator (13); A first flow control module, the first flow control module comprising a first throttling device (15) and a first solenoid valve (16), the first throttling device (15) and the first solenoid valve (16) being arranged in parallel between the condenser (12) and the water source heat exchanger (14); a second flow control module, the second flow control module comprising a second throttling device (17) and a second solenoid valve (18), the second throttling device (17) and the second solenoid valve (18) being arranged in parallel between the compressor (11) and the water source heat exchanger (14); wherein, One end of the second solenoid valve (18) is used to connect to the medium channel of the water source heat exchanger (14), and the other end of the second solenoid valve (18) is used to connect to the compressor (11); One end of the second throttling device (17) is used to connect to the medium channel of the water source heat exchanger (14), and the other end of the second throttling device (17) is used to connect to the evaporator (13).

2. The water source heat pump temperature control system according to claim 1, characterized in that: A gas-liquid separator (19) is provided at the air inlet of the compressor (11); a first flow channel (20) and a second flow channel (21) are installed at the inlet end of the gas-liquid separator (19); the first flow channel (20) is connected to the evaporator (13), and the second flow channel (21) is connected to the second solenoid valve (18); the outlet end of the gas-liquid separator (19) is connected to the air inlet of the compressor (11) through a pipeline.

3. The water source heat pump temperature control system according to claim 2, characterized in that: The first flow channel (20) is provided with a one-way valve (22) for allowing the medium in the evaporator (13) to flow into the gas-liquid separator (19) in a one-way manner.

4. The water source heat pump temperature control system according to claim 1, characterized in that: A liquid storage tank (23) is provided at the outflow end of the condenser (12).

5. The water source heat pump temperature control system according to claim 4, characterized in that: The outflow end of the liquid storage tank (23) is provided with a first filter (24), the outflow end of the first filter (24) is installed with a third flow channel (25) and a fourth flow channel (26), the third flow channel (25) is installed with the first throttling device (15), and the fourth flow channel (26) is installed with the first solenoid valve (16).

6. The water source heat pump temperature control system according to claim 5, characterized in that: A second filter (27) is provided at the medium outflow end of the water source heat exchanger (14), and the second filter (27) is respectively connected to the second throttling device (17) and the second solenoid valve (18).

7. The water source heat pump temperature control system according to claim 1, characterized in that: The condenser (12) and the evaporator (13) are in the same blowing channel.

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